Annotation of loncom/interface/loncommon.pm, revision 1.430

1.10      albertel    1: # The LearningOnline Network with CAPA
1.1       albertel    2: # a pile of common routines
1.10      albertel    3: #
1.430   ! albertel    4: # $Id: loncommon.pm,v 1.429 2006/07/17 19:47:20 www Exp $
1.10      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.1       albertel   28: 
                     29: # Makes a table out of the previous attempts
1.2       albertel   30: # Inputs result_from_symbread, user, domain, course_id
1.16      harris41   31: # Reads in non-network-related .tab files
1.1       albertel   32: 
1.35      matthew    33: # POD header:
                     34: 
1.45      matthew    35: =pod
                     36: 
1.35      matthew    37: =head1 NAME
                     38: 
                     39: Apache::loncommon - pile of common routines
                     40: 
                     41: =head1 SYNOPSIS
                     42: 
1.112     bowersj2   43: Common routines for manipulating connections, student answers,
                     44:     domains, common Javascript fragments, etc.
1.35      matthew    45: 
1.112     bowersj2   46: =head1 OVERVIEW
1.35      matthew    47: 
1.112     bowersj2   48: A collection of commonly used subroutines that don't have a natural
                     49: home anywhere else. This collection helps remove
1.35      matthew    50: redundancy from other modules and increase efficiency of memory usage.
                     51: 
                     52: =cut 
                     53: 
                     54: # End of POD header
1.1       albertel   55: package Apache::loncommon;
                     56: 
                     57: use strict;
1.258     albertel   58: use Apache::lonnet;
1.46      matthew    59: use GDBM_File;
1.51      www        60: use POSIX qw(strftime mktime);
1.82      www        61: use Apache::lonmenu();
1.117     www        62: use Apache::lonlocal;
1.139     matthew    63: use HTML::Entities;
1.334     albertel   64: use Apache::lonhtmlcommon();
                     65: use Apache::loncoursedata();
1.344     albertel   66: use Apache::lontexconvert();
1.369     www        67: use LONCAPA;
1.117     www        68: 
1.22      www        69: my $readit;
                     70: 
1.157     matthew    71: ##
                     72: ## Global Variables
                     73: ##
1.46      matthew    74: 
1.20      www        75: # ----------------------------------------------- Filetypes/Languages/Copyright
1.12      harris41   76: my %language;
1.124     www        77: my %supported_language;
1.12      harris41   78: my %cprtag;
1.192     taceyjo1   79: my %scprtag;
1.351     www        80: my %fe; my %fd; my %fm;
1.41      ng         81: my %category_extensions;
1.12      harris41   82: 
1.63      www        83: # ---------------------------------------------- Designs
                     84: 
                     85: my %designhash;
                     86: 
1.46      matthew    87: # ---------------------------------------------- Thesaurus variables
1.144     matthew    88: #
                     89: # %Keywords:
                     90: #      A hash used by &keyword to determine if a word is considered a keyword.
                     91: # $thesaurus_db_file 
                     92: #      Scalar containing the full path to the thesaurus database.
1.46      matthew    93: 
                     94: my %Keywords;
                     95: my $thesaurus_db_file;
                     96: 
1.144     matthew    97: #
                     98: # Initialize values from language.tab, copyright.tab, filetypes.tab,
                     99: # thesaurus.tab, and filecategories.tab.
                    100: #
1.18      www       101: BEGIN {
1.46      matthew   102:     # Variable initialization
                    103:     $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
                    104:     #
1.22      www       105:     unless ($readit) {
1.12      harris41  106: # ------------------------------------------------------------------- languages
                    107:     {
1.158     raeburn   108:         my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                    109:                                    '/language.tab';
                    110:         if ( open(my $fh,"<$langtabfile") ) {
1.356     albertel  111:             while (my $line = <$fh>) {
                    112:                 next if ($line=~/^\#/);
                    113:                 chomp($line);
                    114:                 my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$line));
1.158     raeburn   115:                 $language{$key}=$val.' - '.$enc;
                    116:                 if ($sup) {
                    117:                     $supported_language{$key}=$sup;
                    118:                 }
                    119:             }
                    120:             close($fh);
                    121:         }
1.12      harris41  122:     }
                    123: # ------------------------------------------------------------------ copyrights
                    124:     {
1.158     raeburn   125:         my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                    126:                                   '/copyright.tab';
                    127:         if ( open (my $fh,"<$copyrightfile") ) {
1.356     albertel  128:             while (my $line = <$fh>) {
                    129:                 next if ($line=~/^\#/);
                    130:                 chomp($line);
                    131:                 my ($key,$val)=(split(/\s+/,$line,2));
1.158     raeburn   132:                 $cprtag{$key}=$val;
                    133:             }
                    134:             close($fh);
                    135:         }
1.12      harris41  136:     }
1.351     www       137: # ----------------------------------------------------------- source copyrights
1.192     taceyjo1  138:     {
                    139:         my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                    140:                                   '/source_copyright.tab';
                    141:         if ( open (my $fh,"<$sourcecopyrightfile") ) {
1.356     albertel  142:             while (my $line = <$fh>) {
                    143:                 next if ($line =~ /^\#/);
                    144:                 chomp($line);
                    145:                 my ($key,$val)=(split(/\s+/,$line,2));
1.192     taceyjo1  146:                 $scprtag{$key}=$val;
                    147:             }
                    148:             close($fh);
                    149:         }
                    150:     }
1.63      www       151: 
                    152: # -------------------------------------------------------------- domain designs
                    153: 
                    154:     my $filename;
                    155:     my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
                    156:     opendir(DIR,$designdir);
                    157:     while ($filename=readdir(DIR)) {
1.271     albertel  158: 	if ($filename!~/\.tab$/) { next; }
1.63      www       159: 	my ($domain)=($filename=~/^(\w+)\./);
1.271     albertel  160: 	{
                    161: 	    my $designfile = $designdir.'/'.$filename;
                    162: 	    if ( open (my $fh,"<$designfile") ) {
1.356     albertel  163: 		while (my $line = <$fh>) {
                    164: 		    next if ($line =~ /^\#/);
                    165: 		    chomp($line);
                    166: 		    my ($key,$val)=(split(/\=/,$line));
1.271     albertel  167: 		    if ($val) { $designhash{$domain.'.'.$key}=$val; }
                    168: 		}
                    169: 		close($fh);
                    170: 	    }
                    171: 	}
1.63      www       172: 
                    173:     }
                    174:     closedir(DIR);
                    175: 
                    176: 
1.15      harris41  177: # ------------------------------------------------------------- file categories
                    178:     {
1.158     raeburn   179:         my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                    180:                                   '/filecategories.tab';
                    181:         if ( open (my $fh,"<$categoryfile") ) {
1.356     albertel  182: 	    while (my $line = <$fh>) {
                    183: 		next if ($line =~ /^\#/);
                    184: 		chomp($line);
                    185:                 my ($extension,$category)=(split(/\s+/,$line,2));
1.158     raeburn   186:                 push @{$category_extensions{lc($category)}},$extension;
                    187:             }
                    188:             close($fh);
                    189:         }
                    190: 
1.15      harris41  191:     }
1.12      harris41  192: # ------------------------------------------------------------------ file types
                    193:     {
1.158     raeburn   194:         my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
                    195:                '/filetypes.tab';
                    196:         if ( open (my $fh,"<$typesfile") ) {
1.356     albertel  197:             while (my $line = <$fh>) {
                    198: 		next if ($line =~ /^\#/);
                    199: 		chomp($line);
                    200:                 my ($ending,$emb,$mime,$descr)=split(/\s+/,$line,4);
1.158     raeburn   201:                 if ($descr ne '') {
                    202:                     $fe{$ending}=lc($emb);
                    203:                     $fd{$ending}=$descr;
1.351     www       204:                     if ($mime ne 'unk') { $fm{$ending}=$mime; }
1.158     raeburn   205:                 }
                    206:             }
                    207:             close($fh);
                    208:         }
1.12      harris41  209:     }
1.22      www       210:     &Apache::lonnet::logthis(
1.46      matthew   211:               "<font color=yellow>INFO: Read file types</font>");
1.22      www       212:     $readit=1;
1.46      matthew   213:     }  # end of unless($readit) 
1.32      matthew   214:     
                    215: }
1.112     bowersj2  216: 
1.42      matthew   217: ###############################################################
                    218: ##           HTML and Javascript Helper Functions            ##
                    219: ###############################################################
                    220: 
                    221: =pod 
                    222: 
1.112     bowersj2  223: =head1 HTML and Javascript Functions
1.42      matthew   224: 
1.112     bowersj2  225: =over 4
                    226: 
                    227: =item * browser_and_searcher_javascript ()
                    228: 
                    229: X<browsing, javascript>X<searching, javascript>Returns a string
                    230: containing javascript with two functions, C<openbrowser> and
                    231: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
                    232: tags.
1.42      matthew   233: 
1.112     bowersj2  234: =item * openbrowser(formname,elementname,only,omit) [javascript]
1.42      matthew   235: 
                    236: inputs: formname, elementname, only, omit
                    237: 
                    238: formname and elementname indicate the name of the html form and name of
                    239: the element that the results of the browsing selection are to be placed in. 
                    240: 
                    241: Specifying 'only' will restrict the browser to displaying only files
1.185     www       242: with the given extension.  Can be a comma separated list.
1.42      matthew   243: 
                    244: Specifying 'omit' will restrict the browser to NOT displaying files
1.185     www       245: with the given extension.  Can be a comma separated list.
1.42      matthew   246: 
1.112     bowersj2  247: =item * opensearcher(formname, elementname) [javascript]
1.42      matthew   248: 
                    249: Inputs: formname, elementname
                    250: 
                    251: formname and elementname specify the name of the html form and the name
                    252: of the element the selection from the search results will be placed in.
                    253: 
                    254: =cut
                    255: 
                    256: sub browser_and_searcher_javascript {
1.199     albertel  257:     my ($mode)=@_;
                    258:     if (!defined($mode)) { $mode='edit'; }
1.170     www       259:     my $resurl=&lastresurl();
1.42      matthew   260:     return <<END;
1.219     albertel  261: // <!-- BEGIN LON-CAPA Internal
1.50      matthew   262:     var editbrowser = null;
1.135     albertel  263:     function openbrowser(formname,elementname,only,omit,titleelement) {
1.170     www       264:         var url = '$resurl/?';
1.42      matthew   265:         if (editbrowser == null) {
                    266:             url += 'launch=1&';
                    267:         }
                    268:         url += 'catalogmode=interactive&';
1.199     albertel  269:         url += 'mode=$mode&';
1.42      matthew   270:         url += 'form=' + formname + '&';
                    271:         if (only != null) {
                    272:             url += 'only=' + only + '&';
1.217     albertel  273:         } else {
                    274:             url += 'only=&';
                    275: 	}
1.42      matthew   276:         if (omit != null) {
                    277:             url += 'omit=' + omit + '&';
1.217     albertel  278:         } else {
                    279:             url += 'omit=&';
                    280: 	}
1.135     albertel  281:         if (titleelement != null) {
                    282:             url += 'titleelement=' + titleelement + '&';
1.217     albertel  283:         } else {
                    284: 	    url += 'titleelement=&';
                    285: 	}
1.42      matthew   286:         url += 'element=' + elementname + '';
                    287:         var title = 'Browser';
1.217     albertel  288:         var options = 'scrollbars=1,resizable=1,menubar=1,location=1';
1.42      matthew   289:         options += ',width=700,height=600';
                    290:         editbrowser = open(url,title,options,'1');
                    291:         editbrowser.focus();
                    292:     }
                    293:     var editsearcher;
1.135     albertel  294:     function opensearcher(formname,elementname,titleelement) {
1.42      matthew   295:         var url = '/adm/searchcat?';
                    296:         if (editsearcher == null) {
                    297:             url += 'launch=1&';
                    298:         }
                    299:         url += 'catalogmode=interactive&';
1.199     albertel  300:         url += 'mode=$mode&';
1.42      matthew   301:         url += 'form=' + formname + '&';
1.135     albertel  302:         if (titleelement != null) {
                    303:             url += 'titleelement=' + titleelement + '&';
1.217     albertel  304:         } else {
                    305: 	    url += 'titleelement=&';
                    306: 	}
1.42      matthew   307:         url += 'element=' + elementname + '';
                    308:         var title = 'Search';
                    309:         var options = 'scrollbars=1,resizable=1,menubar=0';
                    310:         options += ',width=700,height=600';
                    311:         editsearcher = open(url,title,options,'1');
                    312:         editsearcher.focus();
                    313:     }
1.219     albertel  314: // END LON-CAPA Internal -->
1.42      matthew   315: END
1.170     www       316: }
                    317: 
                    318: sub lastresurl {
1.258     albertel  319:     if ($env{'environment.lastresurl'}) {
                    320: 	return $env{'environment.lastresurl'}
1.170     www       321:     } else {
                    322: 	return '/res';
                    323:     }
                    324: }
                    325: 
                    326: sub storeresurl {
                    327:     my $resurl=&Apache::lonnet::clutter(shift);
                    328:     unless ($resurl=~/^\/res/) { return 0; }
                    329:     $resurl=~s/\/$//;
                    330:     &Apache::lonnet::put('environment',{'lastresurl' => $resurl});
                    331:     &Apache::lonnet::appenv('environment.lastresurl' => $resurl);
                    332:     return 1;
1.42      matthew   333: }
                    334: 
1.74      www       335: sub studentbrowser_javascript {
1.111     www       336:    unless (
1.258     albertel  337:             (($env{'request.course.id'}) && 
1.302     albertel  338:              (&Apache::lonnet::allowed('srm',$env{'request.course.id'})
                    339: 	      || &Apache::lonnet::allowed('srm',$env{'request.course.id'}.
                    340: 					  '/'.$env{'request.course.sec'})
                    341: 	      ))
1.258     albertel  342:          || ($env{'request.role'}=~/^(au|dc|su)/)
1.111     www       343:           ) { return ''; }  
1.74      www       344:    return (<<'ENDSTDBRW');
                    345: <script type="text/javascript" language="Javascript" >
                    346:     var stdeditbrowser;
1.111     www       347:     function openstdbrowser(formname,uname,udom,roleflag) {
1.74      www       348:         var url = '/adm/pickstudent?';
                    349:         var filter;
                    350:         eval('filter=document.'+formname+'.'+uname+'.value;');
                    351:         if (filter != null) {
                    352:            if (filter != '') {
                    353:                url += 'filter='+filter+'&';
                    354: 	   }
                    355:         }
                    356:         url += 'form=' + formname + '&unameelement='+uname+
                    357:                                     '&udomelement='+udom;
1.111     www       358: 	if (roleflag) { url+="&roles=1"; }
1.102     www       359:         var title = 'Student_Browser';
1.74      www       360:         var options = 'scrollbars=1,resizable=1,menubar=0';
                    361:         options += ',width=700,height=600';
                    362:         stdeditbrowser = open(url,title,options,'1');
                    363:         stdeditbrowser.focus();
                    364:     }
                    365: </script>
                    366: ENDSTDBRW
                    367: }
1.42      matthew   368: 
1.74      www       369: sub selectstudent_link {
1.111     www       370:    my ($form,$unameele,$udomele)=@_;
1.258     albertel  371:    if ($env{'request.course.id'}) {  
1.302     albertel  372:        if (!&Apache::lonnet::allowed('srm',$env{'request.course.id'})
                    373: 	   && !&Apache::lonnet::allowed('srm',$env{'request.course.id'}.
                    374: 					'/'.$env{'request.course.sec'})) {
1.111     www       375: 	   return '';
                    376:        }
                    377:        return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
1.119     www       378:         '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
1.74      www       379:    }
1.258     albertel  380:    if ($env{'request.role'}=~/^(au|dc|su)/) {
1.111     www       381:        return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
1.119     www       382:         '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
1.111     www       383:    }
                    384:    return '';
1.91      www       385: }
                    386: 
                    387: sub coursebrowser_javascript {
1.234     raeburn   388:     my ($domainfilter)=@_;
1.377     raeburn   389:     my $crs_or_grp_alert = &mt('Please select the type of LON-CAPA entity - Course or Group - for which you wish to add/modify a user role');
1.128     albertel  390:    return (<<ENDSTDBRW);
1.91      www       391: <script type="text/javascript" language="Javascript" >
                    392:     var stdeditbrowser;
1.377     raeburn   393:     function opencrsbrowser(formname,uname,udom,desc,extra_element,multflag,crstype) {
1.91      www       394:         var url = '/adm/pickcourse?';
                    395:         var filter;
                    396:         if (filter != null) {
                    397:            if (filter != '') {
                    398:                url += 'filter='+filter+'&';
                    399: 	   }
                    400:         }
1.128     albertel  401:         var domainfilter='$domainfilter';
                    402:         if (domainfilter != null) {
                    403:            if (domainfilter != '') {
                    404:                url += 'domainfilter='+domainfilter+'&';
                    405: 	   }
                    406:         }
1.91      www       407:         url += 'form=' + formname + '&cnumelement='+uname+
1.187     albertel  408: 	                            '&cdomelement='+udom+
                    409:                                     '&cnameelement='+desc;
1.234     raeburn   410:         if (extra_element !=null && extra_element != '' && formname == 'rolechoice') {
                    411:             url += '&roleelement='+extra_element;
                    412:             if (domainfilter == null || domainfilter == '') {
                    413:                 url += '&domainfilter='+extra_element;
                    414:             }
1.230     raeburn   415:         }
1.293     raeburn   416:         if (multflag !=null && multflag != '') {
                    417:             url += '&multiple='+multflag;
                    418:         }
1.377     raeburn   419:         if (crstype == 'Course/Group') {
                    420:             if (formname == 'cu') {
                    421:                 crstype = document.cu.crstype.options[document.cu.crstype.selectedIndex].value; 
                    422:                 if (crstype == "") {
                    423:                     alert("$crs_or_grp_alert");
                    424:                     return;
                    425:                 }
                    426:             }
                    427:         }
                    428:         if (crstype !=null && crstype != '') {
                    429:             url += '&type='+crstype;
                    430:         }
1.102     www       431:         var title = 'Course_Browser';
1.91      www       432:         var options = 'scrollbars=1,resizable=1,menubar=0';
                    433:         options += ',width=700,height=600';
                    434:         stdeditbrowser = open(url,title,options,'1');
                    435:         stdeditbrowser.focus();
                    436:     }
                    437: </script>
                    438: ENDSTDBRW
                    439: }
                    440: 
                    441: sub selectcourse_link {
1.377     raeburn   442:    my ($form,$unameele,$udomele,$desc,$extra_element,$multflag,$selecttype)=@_;
1.91      www       443:     return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
1.377     raeburn   444:         '","'.$udomele.'","'.$desc.'","'.$extra_element.'","'.$multflag.'","'.$selecttype.'");'."'>".&mt('Select [_1]',$selecttype)."</a>";
1.74      www       445: }
1.42      matthew   446: 
1.273     raeburn   447: sub check_uncheck_jscript {
                    448:     my $jscript = <<"ENDSCRT";
                    449: function checkAll(field) {
                    450:     if (field.length > 0) {
                    451:         for (i = 0; i < field.length; i++) {
                    452:             field[i].checked = true ;
                    453:         }
                    454:     } else {
                    455:         field.checked = true
                    456:     }
                    457: }
                    458:  
                    459: function uncheckAll(field) {
                    460:     if (field.length > 0) {
                    461:         for (i = 0; i < field.length; i++) {
                    462:             field[i].checked = false ;
                    463:         }     } else {
                    464:         field.checked = false ;
                    465:     }
                    466: }
                    467: ENDSCRT
                    468:     return $jscript;
                    469: }
                    470: 
                    471: 
1.42      matthew   472: =pod
1.36      matthew   473: 
1.112     bowersj2  474: =item * linked_select_forms(...)
1.36      matthew   475: 
                    476: linked_select_forms returns a string containing a <script></script> block
                    477: and html for two <select> menus.  The select menus will be linked in that
                    478: changing the value of the first menu will result in new values being placed
                    479: in the second menu.  The values in the select menu will appear in alphabetical
                    480: order.
                    481: 
                    482: linked_select_forms takes the following ordered inputs:
                    483: 
                    484: =over 4
                    485: 
1.112     bowersj2  486: =item * $formname, the name of the <form> tag
1.36      matthew   487: 
1.112     bowersj2  488: =item * $middletext, the text which appears between the <select> tags
1.36      matthew   489: 
1.112     bowersj2  490: =item * $firstdefault, the default value for the first menu
1.36      matthew   491: 
1.112     bowersj2  492: =item * $firstselectname, the name of the first <select> tag
1.36      matthew   493: 
1.112     bowersj2  494: =item * $secondselectname, the name of the second <select> tag
1.36      matthew   495: 
1.112     bowersj2  496: =item * $hashref, a reference to a hash containing the data for the menus.
1.36      matthew   497: 
1.41      ng        498: =back 
                    499: 
1.36      matthew   500: Below is an example of such a hash.  Only the 'text', 'default', and 
                    501: 'select2' keys must appear as stated.  keys(%menu) are the possible 
                    502: values for the first select menu.  The text that coincides with the 
1.41      ng        503: first menu value is given in $menu{$choice1}->{'text'}.  The values 
1.36      matthew   504: and text for the second menu are given in the hash pointed to by 
                    505: $menu{$choice1}->{'select2'}.  
                    506: 
1.112     bowersj2  507:  my %menu = ( A1 => { text =>"Choice A1" ,
                    508:                        default => "B3",
                    509:                        select2 => { 
                    510:                            B1 => "Choice B1",
                    511:                            B2 => "Choice B2",
                    512:                            B3 => "Choice B3",
                    513:                            B4 => "Choice B4"
                    514:                            }
                    515:                    },
                    516:                A2 => { text =>"Choice A2" ,
                    517:                        default => "C2",
                    518:                        select2 => { 
                    519:                            C1 => "Choice C1",
                    520:                            C2 => "Choice C2",
                    521:                            C3 => "Choice C3"
                    522:                            }
                    523:                    },
                    524:                A3 => { text =>"Choice A3" ,
                    525:                        default => "D6",
                    526:                        select2 => { 
                    527:                            D1 => "Choice D1",
                    528:                            D2 => "Choice D2",
                    529:                            D3 => "Choice D3",
                    530:                            D4 => "Choice D4",
                    531:                            D5 => "Choice D5",
                    532:                            D6 => "Choice D6",
                    533:                            D7 => "Choice D7"
                    534:                            }
                    535:                    }
                    536:                );
1.36      matthew   537: 
                    538: =cut
                    539: 
                    540: sub linked_select_forms {
                    541:     my ($formname,
                    542:         $middletext,
                    543:         $firstdefault,
                    544:         $firstselectname,
                    545:         $secondselectname, 
                    546:         $hashref
                    547:         ) = @_;
                    548:     my $second = "document.$formname.$secondselectname";
                    549:     my $first = "document.$formname.$firstselectname";
                    550:     # output the javascript to do the changing
                    551:     my $result = '';
1.219     albertel  552:     $result.="<script type=\"text/javascript\">\n";
1.36      matthew   553:     $result.="var select2data = new Object();\n";
                    554:     $" = '","';
                    555:     my $debug = '';
                    556:     foreach my $s1 (sort(keys(%$hashref))) {
                    557:         $result.="select2data.d_$s1 = new Object();\n";        
                    558:         $result.="select2data.d_$s1.def = new String('".
                    559:             $hashref->{$s1}->{'default'}."');\n";
                    560:         $result.="select2data.d_$s1.values = new Array(";        
                    561:         my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
                    562:         $result.="\"@s2values\");\n";
                    563:         $result.="select2data.d_$s1.texts = new Array(";        
                    564:         my @s2texts;
                    565:         foreach my $value (@s2values) {
                    566:             push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
                    567:         }
                    568:         $result.="\"@s2texts\");\n";
                    569:     }
                    570:     $"=' ';
                    571:     $result.= <<"END";
                    572: 
                    573: function select1_changed() {
                    574:     // Determine new choice
                    575:     var newvalue = "d_" + $first.value;
                    576:     // update select2
                    577:     var values     = select2data[newvalue].values;
                    578:     var texts      = select2data[newvalue].texts;
                    579:     var select2def = select2data[newvalue].def;
                    580:     var i;
                    581:     // out with the old
                    582:     for (i = 0; i < $second.options.length; i++) {
                    583:         $second.options[i] = null;
                    584:     }
                    585:     // in with the nuclear
                    586:     for (i=0;i<values.length; i++) {
                    587:         $second.options[i] = new Option(values[i]);
1.143     matthew   588:         $second.options[i].value = values[i];
1.36      matthew   589:         $second.options[i].text = texts[i];
                    590:         if (values[i] == select2def) {
                    591:             $second.options[i].selected = true;
                    592:         }
                    593:     }
                    594: }
                    595: </script>
                    596: END
                    597:     # output the initial values for the selection lists
                    598:     $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
                    599:     foreach my $value (sort(keys(%$hashref))) {
                    600:         $result.="    <option value=\"$value\" ";
1.253     albertel  601:         $result.=" selected=\"selected\" " if ($value eq $firstdefault);
1.119     www       602:         $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
1.36      matthew   603:     }
                    604:     $result .= "</select>\n";
                    605:     my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
                    606:     $result .= $middletext;
                    607:     $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
                    608:     my $seconddefault = $hashref->{$firstdefault}->{'default'};
                    609:     foreach my $value (sort(keys(%select2))) {
                    610:         $result.="    <option value=\"$value\" ";        
1.253     albertel  611:         $result.=" selected=\"selected\" " if ($value eq $seconddefault);
1.119     www       612:         $result.=">".&mt($select2{$value})."</option>\n";
1.36      matthew   613:     }
                    614:     $result .= "</select>\n";
                    615:     #    return $debug;
                    616:     return $result;
                    617: }   #  end of sub linked_select_forms {
                    618: 
1.45      matthew   619: =pod
1.44      bowersj2  620: 
1.112     bowersj2  621: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
1.44      bowersj2  622: 
1.112     bowersj2  623: Returns a string corresponding to an HTML link to the given help
                    624: $topic, where $topic corresponds to the name of a .tex file in
                    625: /home/httpd/html/adm/help/tex, with underscores replaced by
                    626: spaces. 
                    627: 
                    628: $text will optionally be linked to the same topic, allowing you to
                    629: link text in addition to the graphic. If you do not want to link
                    630: text, but wish to specify one of the later parameters, pass an
                    631: empty string. 
                    632: 
                    633: $stayOnPage is a value that will be interpreted as a boolean. If true,
                    634: the link will not open a new window. If false, the link will open
                    635: a new window using Javascript. (Default is false.) 
                    636: 
                    637: $width and $height are optional numerical parameters that will
                    638: override the width and height of the popped up window, which may
                    639: be useful for certain help topics with big pictures included. 
1.44      bowersj2  640: 
                    641: =cut
                    642: 
                    643: sub help_open_topic {
1.48      bowersj2  644:     my ($topic, $text, $stayOnPage, $width, $height) = @_;
                    645:     $text = "" if (not defined $text);
1.44      bowersj2  646:     $stayOnPage = 0 if (not defined $stayOnPage);
1.258     albertel  647:     if ($env{'browser.interface'} eq 'textual' ||
                    648: 	$env{'environment.remote'} eq 'off' ) {
1.79      www       649: 	$stayOnPage=1;
                    650:     }
1.44      bowersj2  651:     $width = 350 if (not defined $width);
                    652:     $height = 400 if (not defined $height);
                    653:     my $filename = $topic;
                    654:     $filename =~ s/ /_/g;
                    655: 
1.48      bowersj2  656:     my $template = "";
                    657:     my $link;
1.159     www       658: 
                    659:     $topic=~s/\W/\_/g;
1.44      bowersj2  660: 
                    661:     if (!$stayOnPage)
                    662:     {
1.72      bowersj2  663: 	$link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
1.44      bowersj2  664:     }
                    665:     else
                    666:     {
1.48      bowersj2  667: 	$link = "/adm/help/${filename}.hlp";
                    668:     }
                    669: 
                    670:     # Add the text
                    671:     if ($text ne "")
                    672:     {
1.77      www       673: 	$template .= 
                    674:   "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
1.78      www       675:   "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
1.48      bowersj2  676:     }
                    677: 
                    678:     # Add the graphic
1.179     matthew   679:     my $title = &mt('Online Help');
1.215     albertel  680:     my $helpicon=&lonhttpdurl("/adm/help/gif/smallHelp.gif");
1.48      bowersj2  681:     $template .= <<"ENDTEMPLATE";
1.218     albertel  682:  <a href="$link" title="$title"><img src="$helpicon" border="0" alt="(Help: $topic)" /></a>
1.44      bowersj2  683: ENDTEMPLATE
1.78      www       684:     if ($text ne '') { $template.='</td></tr></table>' };
1.44      bowersj2  685:     return $template;
                    686: 
1.106     bowersj2  687: }
                    688: 
                    689: # This is a quicky function for Latex cheatsheet editing, since it 
                    690: # appears in at least four places
                    691: sub helpLatexCheatsheet {
                    692:     my $other = shift;
                    693:     my $addOther = '';
                    694:     if ($other) {
                    695: 	$addOther = Apache::loncommon::help_open_topic($other, shift,
                    696: 						       undef, undef, 600) .
                    697: 							   '</td><td>';
                    698:     }
                    699:     return '<table><tr><td>'.
                    700: 	$addOther .
                    701: 	&Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
                    702: 					    undef,undef,600)
                    703: 	.'</td><td>'.
                    704: 	&Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
                    705: 					    undef,undef,600)
                    706: 	.'</td></tr></table>';
1.172     www       707: }
                    708: 
1.430   ! albertel  709: sub general_help {
        !           710:     my $helptopic='Student_Intro';
        !           711:     if ($env{'request.role'}=~/^(ca|au)/) {
        !           712: 	$helptopic='Authoring_Intro';
        !           713:     } elsif ($env{'request.role'}=~/^cc/) {
        !           714: 	$helptopic='Course_Coordination_Intro';
        !           715:     }
        !           716:     return $helptopic;
        !           717: }
        !           718: 
        !           719: sub update_help_link {
        !           720:     my ($topic,$component_help,$faq,$bug,$stayOnPage) = @_;
        !           721:     my $origurl = $ENV{'REQUEST_URI'};
        !           722:     $origurl=~s|^/~|/priv/|;
        !           723:     my $timestamp = time;
        !           724:     foreach my $datum (\$topic,\$component_help,\$faq,\$bug,\$origurl) {
        !           725:         $$datum = &escape($$datum);
        !           726:     }
        !           727: 
        !           728:     my $banner_link = "/adm/helpmenu?page=banner&amp;topic=$topic&amp;component_help=$component_help&amp;faq=$faq&amp;bug=$bug&amp;origurl=$origurl&amp;stamp=$timestamp&amp;stayonpage=$stayOnPage";
        !           729:     my $output .= <<"ENDOUTPUT";
        !           730: <script type="text/javascript">
        !           731: // <!-- BEGIN LON-CAPA Internal
        !           732: banner_link = '$banner_link';
        !           733: // END LON-CAPA Internal -->
        !           734: </script>
        !           735: ENDOUTPUT
        !           736:     return $output;
        !           737: }
        !           738: 
        !           739: # now just updates the help link and generates a blue icon
1.193     raeburn   740: sub help_open_menu {
1.430   ! albertel  741:     my ($topic,$component_help,$faq,$bug,$stayOnPage,$width,$height,$text) 
        !           742: 	= @_;
        !           743:     
        !           744:     $stayOnPage = 0 if (not defined $stayOnPage);
        !           745:     if ($env{'browser.interface'} eq 'textual' ||
        !           746: 	$env{'environment.remote'} eq 'off' ) {
        !           747: 	$stayOnPage=1;
        !           748:     }
        !           749:     my $output;
        !           750:     if ($component_help) {
        !           751: 	if (!$text) {
        !           752: 	    $output=&help_open_topic($component_help,undef,$stayOnPage,
        !           753: 				       $width,$height);
        !           754: 	} else {
        !           755: 	    my $help_text;
        !           756: 	    $help_text=&unescape($topic);
        !           757: 	    $output='<table><tr><td>'.
        !           758: 		&help_open_topic($component_help,$help_text,$stayOnPage,
        !           759: 				 $width,$height).'</td></tr></table>';
        !           760: 	}
        !           761:     }
        !           762:     my $banner_link = &update_help_link($topic,$component_help,$faq,$bug,$stayOnPage);
        !           763:     return $output.$banner_link;
        !           764: }
        !           765: 
        !           766: sub top_nav_help {
        !           767:     my ($text) = @_;
        !           768: 
        !           769:     my ($topic,$component_help,$faq,$bug,$stayOnPage,$width,$height);
        !           770:    
1.193     raeburn   771:     $text = "" if (not defined $text);
                    772:     $stayOnPage = 0 if (not defined $stayOnPage);
1.258     albertel  773:     if ($env{'browser.interface'} eq 'textual' ||
                    774:         $env{'environment.remote'} eq 'off' ) {
1.193     raeburn   775:         $stayOnPage=1;
                    776:     }
                    777:     $width = 620 if (not defined $width);
                    778:     $height = 600 if (not defined $height);
                    779:     my $link='';
1.201     raeburn   780:     my $title = &mt('Get help');
1.430   ! albertel  781:     if ($stayOnPage) {
        !           782: 	$link = "javascript:helpMenu('display')";
1.195     albertel  783:     } else {
1.430   ! albertel  784:         $link = "javascript:helpMenu('open')";
1.193     raeburn   785:     }
1.430   ! albertel  786:     my $helptopic=&general_help();
        !           787:     my $banner_link = &update_help_link($topic,$component_help,$faq,$bug,$stayOnPage);
        !           788:     my $details_link = '/adm/help/'.$helptopic.'.hlp';
1.196     albertel  789:     my $template;
1.261     albertel  790:     my $nothing=&Apache::lonhtmlcommon::javascript_nothing();
1.215     albertel  791:     my $helpicon=&lonhttpdurl("/adm/lonIcons/helpgateway.gif");
1.331     albertel  792:     my $start_page =
                    793:         &Apache::loncommon::start_page('Help Menu', undef,
                    794: 				       {'frameset'    => 1,
                    795: 					'js_ready'    => 1,
                    796: 					'add_entries' => {
                    797: 					    'border' => '0',
                    798: 					    'rows'   => "105,*",},});
                    799:     my $end_page =
                    800:         &Apache::loncommon::end_page({'frameset' => 1,
                    801: 				      'js_ready' => 1,});
                    802: 
1.196     albertel  803:     $template .= <<"ENDTEMPLATE";
1.219     albertel  804:  <script type="text/javascript">
1.253     albertel  805: // <!-- BEGIN LON-CAPA Internal
                    806: // <![CDATA[
1.430   ! albertel  807: var banner_link = '';
1.243     raeburn   808: function helpMenu(target) {
                    809:     var caller = this;
                    810:     if (target == 'open') {
                    811:         var newWindow = null;
                    812:         try {
1.262     albertel  813:             newWindow =  window.open($nothing,"helpmenu","HEIGHT=$height,WIDTH=$width,resizable=yes,scrollbars=yes" )
1.243     raeburn   814:         }
                    815:         catch(error) {
                    816:             writeHelp(caller);
                    817:             return;
                    818:         }
                    819:         if (newWindow) {
                    820:             caller = newWindow;
                    821:         }
1.193     raeburn   822:     }
1.243     raeburn   823:     writeHelp(caller);
                    824:     return;
                    825: }
                    826: function writeHelp(caller) {
1.430   ! albertel  827:     caller.document.writeln('$start_page<frame name="bannerframe"  src="'+banner_link+'" /><frame name="bodyframe" src="$details_link" /> $end_page')
1.243     raeburn   828:     caller.document.close()
                    829:     caller.focus()
1.193     raeburn   830: }
1.253     albertel  831: // ]]>
1.219     albertel  832: // END LON-CAPA Internal -->
1.193     raeburn   833:  </script>
1.430   ! albertel  834: $banner_link
        !           835:  <a href="$link" title="$title">$text<img src="$helpicon" border="0" alt="(Help Menu)" /></a>
1.193     raeburn   836: ENDTEMPLATE
                    837:     return $template;
                    838: }
                    839: 
1.172     www       840: sub help_open_bug {
                    841:     my ($topic, $text, $stayOnPage, $width, $height) = @_;
1.258     albertel  842:     unless ($env{'user.adv'}) { return ''; }
1.172     www       843:     unless ($Apache::lonnet::perlvar{'BugzillaHost'}) { return ''; }
                    844:     $text = "" if (not defined $text);
                    845:     $stayOnPage = 0 if (not defined $stayOnPage);
1.258     albertel  846:     if ($env{'browser.interface'} eq 'textual' ||
                    847: 	$env{'environment.remote'} eq 'off' ) {
1.172     www       848: 	$stayOnPage=1;
                    849:     }
1.184     albertel  850:     $width = 600 if (not defined $width);
                    851:     $height = 600 if (not defined $height);
1.172     www       852: 
                    853:     $topic=~s/\W+/\+/g;
                    854:     my $link='';
                    855:     my $template='';
1.379     albertel  856:     my $url=$Apache::lonnet::perlvar{'BugzillaHost'}.'enter_bug.cgi?product=LON-CAPA&amp;bug_file_loc='.
                    857: 	&escape($ENV{'REQUEST_URI'}).'&amp;component='.$topic;
1.172     www       858:     if (!$stayOnPage)
                    859:     {
                    860: 	$link = "javascript:void(open('$url', 'Bugzilla', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
                    861:     }
                    862:     else
                    863:     {
                    864: 	$link = $url;
                    865:     }
                    866:     # Add the text
                    867:     if ($text ne "")
                    868:     {
                    869: 	$template .= 
                    870:   "<table bgcolor='#AA3333' cellspacing='1' cellpadding='1' border='0'><tr>".
                    871:   "<td bgcolor='#FF5555'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
                    872:     }
                    873: 
                    874:     # Add the graphic
1.179     matthew   875:     my $title = &mt('Report a Bug');
1.215     albertel  876:     my $bugicon=&lonhttpdurl("/adm/lonMisc/smallBug.gif");
1.172     www       877:     $template .= <<"ENDTEMPLATE";
1.218     albertel  878:  <a href="$link" title="$title"><img src="$bugicon" border="0" alt="(Bug: $topic)" /></a>
1.172     www       879: ENDTEMPLATE
                    880:     if ($text ne '') { $template.='</td></tr></table>' };
                    881:     return $template;
                    882: 
                    883: }
                    884: 
                    885: sub help_open_faq {
                    886:     my ($topic, $text, $stayOnPage, $width, $height) = @_;
1.258     albertel  887:     unless ($env{'user.adv'}) { return ''; }
1.172     www       888:     unless ($Apache::lonnet::perlvar{'FAQHost'}) { return ''; }
                    889:     $text = "" if (not defined $text);
                    890:     $stayOnPage = 0 if (not defined $stayOnPage);
1.258     albertel  891:     if ($env{'browser.interface'} eq 'textual' ||
                    892: 	$env{'environment.remote'} eq 'off' ) {
1.172     www       893: 	$stayOnPage=1;
                    894:     }
                    895:     $width = 350 if (not defined $width);
                    896:     $height = 400 if (not defined $height);
                    897: 
                    898:     $topic=~s/\W+/\+/g;
                    899:     my $link='';
                    900:     my $template='';
                    901:     my $url=$Apache::lonnet::perlvar{'FAQHost'}.'/fom/cache/'.$topic.'.html';
                    902:     if (!$stayOnPage)
                    903:     {
                    904: 	$link = "javascript:void(open('$url', 'FAQ-O-Matic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
                    905:     }
                    906:     else
                    907:     {
                    908: 	$link = $url;
                    909:     }
                    910: 
                    911:     # Add the text
                    912:     if ($text ne "")
                    913:     {
                    914: 	$template .= 
1.173     www       915:   "<table bgcolor='#337733' cellspacing='1' cellpadding='1' border='0'><tr>".
                    916:   "<td bgcolor='#448844'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
1.172     www       917:     }
                    918: 
                    919:     # Add the graphic
1.179     matthew   920:     my $title = &mt('View the FAQ');
1.215     albertel  921:     my $faqicon=&lonhttpdurl("/adm/lonMisc/smallFAQ.gif");
1.172     www       922:     $template .= <<"ENDTEMPLATE";
1.218     albertel  923:  <a href="$link" title="$title"><img src="$faqicon" border="0" alt="(FAQ: $topic)" /></a>
1.172     www       924: ENDTEMPLATE
                    925:     if ($text ne '') { $template.='</td></tr></table>' };
                    926:     return $template;
                    927: 
1.44      bowersj2  928: }
1.37      matthew   929: 
1.180     matthew   930: ###############################################################
                    931: ###############################################################
                    932: 
1.45      matthew   933: =pod
                    934: 
1.256     matthew   935: =item * change_content_javascript():
                    936: 
                    937: This and the next function allow you to create small sections of an
                    938: otherwise static HTML page that you can update on the fly with
                    939: Javascript, even in Netscape 4.
                    940: 
                    941: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
                    942: must be written to the HTML page once. It will prove the Javascript
                    943: function "change(name, content)". Calling the change function with the
                    944: name of the section 
                    945: you want to update, matching the name passed to C<changable_area>, and
                    946: the new content you want to put in there, will put the content into
                    947: that area.
                    948: 
                    949: B<Note>: Netscape 4 only reserves enough space for the changable area
                    950: to contain room for the original contents. You need to "make space"
                    951: for whatever changes you wish to make, and be B<sure> to check your
                    952: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
                    953: it's adequate for updating a one-line status display, but little more.
                    954: This script will set the space to 100% width, so you only need to
                    955: worry about height in Netscape 4.
                    956: 
                    957: Modern browsers are much less limiting, and if you can commit to the
                    958: user not using Netscape 4, this feature may be used freely with
                    959: pretty much any HTML.
                    960: 
                    961: =cut
                    962: 
                    963: sub change_content_javascript {
                    964:     # If we're on Netscape 4, we need to use Layer-based code
1.258     albertel  965:     if ($env{'browser.type'} eq 'netscape' &&
                    966: 	$env{'browser.version'} =~ /^4\./) {
1.256     matthew   967: 	return (<<NETSCAPE4);
                    968: 	function change(name, content) {
                    969: 	    doc = document.layers[name+"___escape"].layers[0].document;
                    970: 	    doc.open();
                    971: 	    doc.write(content);
                    972: 	    doc.close();
                    973: 	}
                    974: NETSCAPE4
                    975:     } else {
                    976: 	# Otherwise, we need to use semi-standards-compliant code
                    977: 	# (technically, "innerHTML" isn't standard but the equivalent
                    978: 	# is really scary, and every useful browser supports it
                    979: 	return (<<DOMBASED);
                    980: 	function change(name, content) {
                    981: 	    element = document.getElementById(name);
                    982: 	    element.innerHTML = content;
                    983: 	}
                    984: DOMBASED
                    985:     }
                    986: }
                    987: 
                    988: =pod
                    989: 
                    990: =item * changable_area($name, $origContent):
                    991: 
                    992: This provides a "changable area" that can be modified on the fly via
                    993: the Javascript code provided in C<change_content_javascript>. $name is
                    994: the name you will use to reference the area later; do not repeat the
                    995: same name on a given HTML page more then once. $origContent is what
                    996: the area will originally contain, which can be left blank.
                    997: 
                    998: =cut
                    999: 
                   1000: sub changable_area {
                   1001:     my ($name, $origContent) = @_;
                   1002: 
1.258     albertel 1003:     if ($env{'browser.type'} eq 'netscape' &&
                   1004: 	$env{'browser.version'} =~ /^4\./) {
1.256     matthew  1005: 	# If this is netscape 4, we need to use the Layer tag
                   1006: 	return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
                   1007:     } else {
                   1008: 	return "<span id='$name'>$origContent</span>";
                   1009:     }
                   1010: }
                   1011: 
                   1012: =pod
                   1013: 
                   1014: =back
                   1015: 
                   1016: =head1 Excel and CSV file utility routines
                   1017: 
                   1018: =over 4
                   1019: 
                   1020: =cut
                   1021: 
                   1022: ###############################################################
                   1023: ###############################################################
                   1024: 
                   1025: =pod
                   1026: 
1.112     bowersj2 1027: =item * csv_translate($text) 
1.37      matthew  1028: 
1.185     www      1029: Translate $text to allow it to be output as a 'comma separated values' 
1.37      matthew  1030: format.
                   1031: 
                   1032: =cut
                   1033: 
1.180     matthew  1034: ###############################################################
                   1035: ###############################################################
1.37      matthew  1036: sub csv_translate {
                   1037:     my $text = shift;
                   1038:     $text =~ s/\"/\"\"/g;
1.209     albertel 1039:     $text =~ s/\n/ /g;
1.37      matthew  1040:     return $text;
                   1041: }
1.180     matthew  1042: 
                   1043: ###############################################################
                   1044: ###############################################################
                   1045: 
                   1046: =pod
                   1047: 
                   1048: =item * define_excel_formats
                   1049: 
                   1050: Define some commonly used Excel cell formats.
                   1051: 
                   1052: Currently supported formats:
                   1053: 
                   1054: =over 4
                   1055: 
                   1056: =item header
                   1057: 
                   1058: =item bold
                   1059: 
                   1060: =item h1
                   1061: 
                   1062: =item h2
                   1063: 
                   1064: =item h3
                   1065: 
1.256     matthew  1066: =item h4
                   1067: 
                   1068: =item i
                   1069: 
1.180     matthew  1070: =item date
                   1071: 
                   1072: =back
                   1073: 
                   1074: Inputs: $workbook
                   1075: 
                   1076: Returns: $format, a hash reference.
                   1077: 
                   1078: =cut
                   1079: 
                   1080: ###############################################################
                   1081: ###############################################################
                   1082: sub define_excel_formats {
                   1083:     my ($workbook) = @_;
                   1084:     my $format;
                   1085:     $format->{'header'} = $workbook->add_format(bold      => 1, 
                   1086:                                                 bottom    => 1,
                   1087:                                                 align     => 'center');
                   1088:     $format->{'bold'} = $workbook->add_format(bold=>1);
                   1089:     $format->{'h1'}   = $workbook->add_format(bold=>1, size=>18);
                   1090:     $format->{'h2'}   = $workbook->add_format(bold=>1, size=>16);
                   1091:     $format->{'h3'}   = $workbook->add_format(bold=>1, size=>14);
1.255     matthew  1092:     $format->{'h4'}   = $workbook->add_format(bold=>1, size=>12);
1.246     matthew  1093:     $format->{'i'}    = $workbook->add_format(italic=>1);
1.180     matthew  1094:     $format->{'date'} = $workbook->add_format(num_format=>
1.207     matthew  1095:                                             'mm/dd/yyyy hh:mm:ss');
1.180     matthew  1096:     return $format;
                   1097: }
                   1098: 
                   1099: ###############################################################
                   1100: ###############################################################
1.113     bowersj2 1101: 
                   1102: =pod
                   1103: 
1.256     matthew  1104: =item * create_workbook
1.255     matthew  1105: 
                   1106: Create an Excel worksheet.  If it fails, output message on the
                   1107: request object and return undefs.
                   1108: 
                   1109: Inputs: Apache request object
                   1110: 
                   1111: Returns (undef) on failure, 
                   1112:     Excel worksheet object, scalar with filename, and formats 
                   1113:     from &Apache::loncommon::define_excel_formats on success
                   1114: 
                   1115: =cut
                   1116: 
                   1117: ###############################################################
                   1118: ###############################################################
                   1119: sub create_workbook {
                   1120:     my ($r) = @_;
                   1121:         #
                   1122:     # Create the excel spreadsheet
                   1123:     my $filename = '/prtspool/'.
1.258     albertel 1124:         $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1.255     matthew  1125:         time.'_'.rand(1000000000).'.xls';
                   1126:     my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
                   1127:     if (! defined($workbook)) {
                   1128:         $r->log_error("Error creating excel spreadsheet $filename: $!");
                   1129:         $r->print('<p>'.&mt("Unable to create new Excel file.  ".
                   1130:                             "This error has been logged.  ".
                   1131:                             "Please alert your LON-CAPA administrator").
                   1132:                   '</p>');
                   1133:         return (undef);
                   1134:     }
                   1135:     #
                   1136:     $workbook->set_tempdir('/home/httpd/perl/tmp');
                   1137:     #
                   1138:     my $format = &Apache::loncommon::define_excel_formats($workbook);
                   1139:     return ($workbook,$filename,$format);
                   1140: }
                   1141: 
                   1142: ###############################################################
                   1143: ###############################################################
                   1144: 
                   1145: =pod
                   1146: 
1.256     matthew  1147: =item * create_text_file
1.113     bowersj2 1148: 
1.256     matthew  1149: Create a file to write to and eventually make available to the usre.
                   1150: If file creation fails, outputs an error message on the request object and 
                   1151: return undefs.
1.113     bowersj2 1152: 
1.256     matthew  1153: Inputs: Apache request object, and file suffix
1.113     bowersj2 1154: 
1.256     matthew  1155: Returns (undef) on failure, 
                   1156:     Filehandle and filename on success.
1.113     bowersj2 1157: 
                   1158: =cut
                   1159: 
1.256     matthew  1160: ###############################################################
                   1161: ###############################################################
                   1162: sub create_text_file {
                   1163:     my ($r,$suffix) = @_;
                   1164:     if (! defined($suffix)) { $suffix = 'txt'; };
                   1165:     my $fh;
                   1166:     my $filename = '/prtspool/'.
1.258     albertel 1167:         $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1.256     matthew  1168:         time.'_'.rand(1000000000).'.'.$suffix;
                   1169:     $fh = Apache::File->new('>/home/httpd'.$filename);
                   1170:     if (! defined($fh)) {
                   1171:         $r->log_error("Couldn't open $filename for output $!");
                   1172:         $r->print("Problems occured in creating the output file.  ".
                   1173:                   "This error has been logged.  ".
                   1174:                   "Please alert your LON-CAPA administrator.");
1.113     bowersj2 1175:     }
1.256     matthew  1176:     return ($fh,$filename)
1.113     bowersj2 1177: }
                   1178: 
                   1179: 
1.256     matthew  1180: =pod 
1.113     bowersj2 1181: 
                   1182: =back
                   1183: 
                   1184: =cut
1.37      matthew  1185: 
                   1186: ###############################################################
1.33      matthew  1187: ##        Home server <option> list generating code          ##
                   1188: ###############################################################
1.35      matthew  1189: 
1.45      matthew  1190: =pod
                   1191: 
1.112     bowersj2 1192: =head1 Home Server option list generating code
                   1193: 
                   1194: =over 4
                   1195: 
                   1196: =item * get_domains()
1.35      matthew  1197: 
                   1198: Returns an array containing each of the domains listed in the hosts.tab
                   1199: file.
                   1200: 
                   1201: =cut
                   1202: 
                   1203: #-------------------------------------------
1.34      matthew  1204: sub get_domains {
                   1205:     # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
                   1206:     my @domains;
                   1207:     my %seen;
1.356     albertel 1208:     foreach my $dom (sort(values(%Apache::lonnet::hostdom))) {
                   1209: 	push(@domains,$dom) unless $seen{$dom}++;
1.34      matthew  1210:     }
                   1211:     return @domains;
                   1212: }
1.88      www      1213: 
1.169     www      1214: # ------------------------------------------
                   1215: 
                   1216: sub domain_select {
                   1217:     my ($name,$value,$multiple)=@_;
                   1218:     my %domains=map { 
                   1219: 	$_ => $_.' '.$Apache::lonnet::domaindescription{$_} 
                   1220:     } &get_domains;
                   1221:     if ($multiple) {
                   1222: 	$domains{''}=&mt('Any domain');
1.287     albertel 1223: 	return &multiple_select_form($name,$value,4,\%domains);
1.169     www      1224:     } else {
                   1225: 	return &select_form($name,$value,%domains);
                   1226:     }
                   1227: }
                   1228: 
1.282     albertel 1229: #-------------------------------------------
                   1230: 
                   1231: =pod
                   1232: 
1.287     albertel 1233: =item * multiple_select_form($name,$value,$size,$hash,$order)
1.282     albertel 1234: 
                   1235: Returns a string containing a <select> element int multiple mode
                   1236: 
                   1237: 
                   1238: Args:
                   1239:   $name - name of the <select> element
                   1240:   $value - sclara or array ref of values that should already be selected
                   1241:   $size - number of rows long the select element is
1.283     albertel 1242:   $hash - the elements should be 'option' => 'shown text'
1.282     albertel 1243:           (shown text should already have been &mt())
1.284     albertel 1244:   $order - (optional) array ref of the order to show the elments in
1.283     albertel 1245: 
1.282     albertel 1246: =cut
                   1247: 
                   1248: #-------------------------------------------
1.169     www      1249: sub multiple_select_form {
1.284     albertel 1250:     my ($name,$value,$size,$hash,$order)=@_;
1.169     www      1251:     my %selected = map { $_ => 1 } ref($value)?@{$value}:($value);
                   1252:     my $output='';
1.191     matthew  1253:     if (! defined($size)) {
                   1254:         $size = 4;
1.283     albertel 1255:         if (scalar(keys(%$hash))<4) {
                   1256:             $size = scalar(keys(%$hash));
1.191     matthew  1257:         }
                   1258:     }
1.169     www      1259:     $output.="\n<select name='$name' size='$size' multiple='1'>";
1.286     banghart 1260:     my @order = ref($order) ? @$order
1.284     albertel 1261:                             : sort(keys(%$hash));
                   1262:     foreach my $key (@order) {
1.356     albertel 1263:         $output.='<option value="'.&HTML::Entities::encode($key,'"<>&').'" ';
1.284     albertel 1264:         $output.='selected="selected" ' if ($selected{$key});
                   1265:         $output.='>'.$hash->{$key}."</option>\n";
1.169     www      1266:     }
                   1267:     $output.="</select>\n";
                   1268:     return $output;
                   1269: }
                   1270: 
1.88      www      1271: #-------------------------------------------
                   1272: 
                   1273: =pod
                   1274: 
1.112     bowersj2 1275: =item * select_form($defdom,$name,%hash)
1.88      www      1276: 
                   1277: Returns a string containing a <select name='$name' size='1'> form to 
                   1278: allow a user to select options from a hash option_name => displayed text.  
                   1279: See lonrights.pm for an example invocation and use.
                   1280: 
                   1281: =cut
                   1282: 
                   1283: #-------------------------------------------
                   1284: sub select_form {
                   1285:     my ($def,$name,%hash) = @_;
                   1286:     my $selectform = "<select name=\"$name\" size=\"1\">\n";
1.128     albertel 1287:     my @keys;
                   1288:     if (exists($hash{'select_form_order'})) {
                   1289: 	@keys=@{$hash{'select_form_order'}};
                   1290:     } else {
                   1291: 	@keys=sort(keys(%hash));
                   1292:     }
1.356     albertel 1293:     foreach my $key (@keys) {
                   1294:         $selectform.=
                   1295: 	    '<option value="'.&HTML::Entities::encode($key,'"<>&').'" '.
                   1296:             ($key eq $def ? 'selected="selected" ' : '').
                   1297:                 ">".&mt($hash{$key})."</option>\n";
1.88      www      1298:     }
                   1299:     $selectform.="</select>";
                   1300:     return $selectform;
                   1301: }
                   1302: 
1.167     www      1303: sub gradeleveldescription {
                   1304:     my $gradelevel=shift;
                   1305:     my %gradelevels=(0 => 'Not specified',
                   1306: 		     1 => 'Grade 1',
                   1307: 		     2 => 'Grade 2',
                   1308: 		     3 => 'Grade 3',
                   1309: 		     4 => 'Grade 4',
                   1310: 		     5 => 'Grade 5',
                   1311: 		     6 => 'Grade 6',
                   1312: 		     7 => 'Grade 7',
                   1313: 		     8 => 'Grade 8',
                   1314: 		     9 => 'Grade 9',
                   1315: 		     10 => 'Grade 10',
                   1316: 		     11 => 'Grade 11',
                   1317: 		     12 => 'Grade 12',
                   1318: 		     13 => 'Grade 13',
                   1319: 		     14 => '100 Level',
                   1320: 		     15 => '200 Level',
                   1321: 		     16 => '300 Level',
                   1322: 		     17 => '400 Level',
                   1323: 		     18 => 'Graduate Level');
                   1324:     return &mt($gradelevels{$gradelevel});
                   1325: }
                   1326: 
1.163     www      1327: sub select_level_form {
                   1328:     my ($deflevel,$name)=@_;
                   1329:     unless ($deflevel) { $deflevel=0; }
1.167     www      1330:     my $selectform = "<select name=\"$name\" size=\"1\">\n";
                   1331:     for (my $i=0; $i<=18; $i++) {
                   1332:         $selectform.="<option value=\"$i\" ".
1.253     albertel 1333:             ($i==$deflevel ? 'selected="selected" ' : '').
1.167     www      1334:                 ">".&gradeleveldescription($i)."</option>\n";
                   1335:     }
                   1336:     $selectform.="</select>";
                   1337:     return $selectform;
1.163     www      1338: }
1.167     www      1339: 
1.35      matthew  1340: #-------------------------------------------
                   1341: 
1.45      matthew  1342: =pod
                   1343: 
1.112     bowersj2 1344: =item * select_dom_form($defdom,$name,$includeempty)
1.35      matthew  1345: 
                   1346: Returns a string containing a <select name='$name' size='1'> form to 
                   1347: allow a user to select the domain to preform an operation in.  
                   1348: See loncreateuser.pm for an example invocation and use.
                   1349: 
1.90      www      1350: If the $includeempty flag is set, it also includes an empty choice ("no domain
                   1351: selected");
                   1352: 
1.35      matthew  1353: =cut
                   1354: 
                   1355: #-------------------------------------------
1.34      matthew  1356: sub select_dom_form {
1.90      www      1357:     my ($defdom,$name,$includeempty) = @_;
1.34      matthew  1358:     my @domains = get_domains();
1.90      www      1359:     if ($includeempty) { @domains=('',@domains); }
1.34      matthew  1360:     my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
1.356     albertel 1361:     foreach my $dom (@domains) {
                   1362:         $selectdomain.="<option value=\"$dom\" ".
                   1363:             ($dom eq $defdom ? 'selected="selected" ' : '').
                   1364:                 ">$dom</option>\n";
1.34      matthew  1365:     }
                   1366:     $selectdomain.="</select>";
                   1367:     return $selectdomain;
                   1368: }
                   1369: 
1.35      matthew  1370: #-------------------------------------------
                   1371: 
1.45      matthew  1372: =pod
                   1373: 
1.112     bowersj2 1374: =item * get_library_servers($domain)
1.35      matthew  1375: 
                   1376: Returns a hash which contains keys like '103l3' and values like 
                   1377: 'kirk.lite.msu.edu'.  All of the keys will be for machines in the
                   1378: given $domain.
                   1379: 
                   1380: =cut
                   1381: 
                   1382: #-------------------------------------------
1.52      matthew  1383: sub get_library_servers {
1.33      matthew  1384:     my $domain = shift;
1.52      matthew  1385:     my %library_servers;
1.356     albertel 1386:     foreach my $hostid (keys(%Apache::lonnet::libserv)) {
                   1387:         if ($Apache::lonnet::hostdom{$hostid} eq $domain) {
                   1388:             $library_servers{$hostid} = $Apache::lonnet::hostname{$hostid};
1.33      matthew  1389:         }
                   1390:     }
1.52      matthew  1391:     return %library_servers;
1.33      matthew  1392: }
                   1393: 
1.35      matthew  1394: #-------------------------------------------
                   1395: 
1.45      matthew  1396: =pod
                   1397: 
1.112     bowersj2 1398: =item * home_server_option_list($domain)
1.35      matthew  1399: 
                   1400: returns a string which contains an <option> list to be used in a 
                   1401: <select> form input.  See loncreateuser.pm for an example.
                   1402: 
                   1403: =cut
                   1404: 
                   1405: #-------------------------------------------
1.33      matthew  1406: sub home_server_option_list {
                   1407:     my $domain = shift;
1.52      matthew  1408:     my %servers = &get_library_servers($domain);
1.33      matthew  1409:     my $result = '';
1.356     albertel 1410:     foreach my $hostid (sort(keys(%servers))) {
1.33      matthew  1411:         $result.=
1.356     albertel 1412:             '<option value="'.$hostid.'">'.
                   1413: 	    $hostid.' '.$servers{$hostid}."</option>\n";
1.33      matthew  1414:     }
                   1415:     return $result;
                   1416: }
1.112     bowersj2 1417: 
                   1418: =pod
                   1419: 
                   1420: =back
                   1421: 
                   1422: =cut
1.87      matthew  1423: 
                   1424: ###############################################################
1.112     bowersj2 1425: ##                  Decoding User Agent                      ##
1.87      matthew  1426: ###############################################################
                   1427: 
                   1428: =pod
                   1429: 
1.112     bowersj2 1430: =head1 Decoding the User Agent
                   1431: 
                   1432: =over 4
                   1433: 
                   1434: =item * &decode_user_agent()
1.87      matthew  1435: 
                   1436: Inputs: $r
                   1437: 
                   1438: Outputs:
                   1439: 
                   1440: =over 4
                   1441: 
1.112     bowersj2 1442: =item * $httpbrowser
1.87      matthew  1443: 
1.112     bowersj2 1444: =item * $clientbrowser
1.87      matthew  1445: 
1.112     bowersj2 1446: =item * $clientversion
1.87      matthew  1447: 
1.112     bowersj2 1448: =item * $clientmathml
1.87      matthew  1449: 
1.112     bowersj2 1450: =item * $clientunicode
1.87      matthew  1451: 
1.112     bowersj2 1452: =item * $clientos
1.87      matthew  1453: 
                   1454: =back
                   1455: 
1.157     matthew  1456: =back 
                   1457: 
1.87      matthew  1458: =cut
                   1459: 
                   1460: ###############################################################
                   1461: ###############################################################
                   1462: sub decode_user_agent {
1.247     albertel 1463:     my ($r)=@_;
1.87      matthew  1464:     my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
                   1465:     my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
                   1466:     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
1.247     albertel 1467:     if (!$httpbrowser && $r) { $httpbrowser=$r->header_in('User-Agent'); }
1.87      matthew  1468:     my $clientbrowser='unknown';
                   1469:     my $clientversion='0';
                   1470:     my $clientmathml='';
                   1471:     my $clientunicode='0';
                   1472:     for (my $i=0;$i<=$#browsertype;$i++) {
                   1473:         my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
                   1474: 	if (($httpbrowser=~/$match/i)  && ($httpbrowser!~/$notmatch/i)) {
                   1475: 	    $clientbrowser=$bname;
                   1476:             $httpbrowser=~/$vreg/i;
                   1477: 	    $clientversion=$1;
                   1478:             $clientmathml=($clientversion>=$minv);
                   1479:             $clientunicode=($clientversion>=$univ);
                   1480: 	}
                   1481:     }
                   1482:     my $clientos='unknown';
                   1483:     if (($httpbrowser=~/linux/i) ||
                   1484:         ($httpbrowser=~/unix/i) ||
                   1485:         ($httpbrowser=~/ux/i) ||
                   1486:         ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
                   1487:     if (($httpbrowser=~/vax/i) ||
                   1488:         ($httpbrowser=~/vms/i)) { $clientos='vms'; }
                   1489:     if ($httpbrowser=~/next/i) { $clientos='next'; }
                   1490:     if (($httpbrowser=~/mac/i) ||
                   1491:         ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
                   1492:     if ($httpbrowser=~/win/i) { $clientos='win'; }
                   1493:     if ($httpbrowser=~/embed/i) { $clientos='pda'; }
                   1494:     return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
                   1495:             $clientunicode,$clientos,);
                   1496: }
                   1497: 
1.32      matthew  1498: ###############################################################
                   1499: ##    Authentication changing form generation subroutines    ##
                   1500: ###############################################################
                   1501: ##
                   1502: ## All of the authform_xxxxxxx subroutines take their inputs in a
                   1503: ## hash, and have reasonable default values.
                   1504: ##
                   1505: ##    formname = the name given in the <form> tag.
1.35      matthew  1506: #-------------------------------------------
                   1507: 
1.45      matthew  1508: =pod
                   1509: 
1.112     bowersj2 1510: =head1 Authentication Routines
                   1511: 
                   1512: =over 4
                   1513: 
                   1514: =item * authform_xxxxxx
1.35      matthew  1515: 
                   1516: The authform_xxxxxx subroutines provide javascript and html forms which 
                   1517: handle some of the conveniences required for authentication forms.  
                   1518: This is not an optimal method, but it works.  
                   1519: 
                   1520: See loncreateuser.pm for invocation and use examples.
                   1521: 
                   1522: =over 4
                   1523: 
1.112     bowersj2 1524: =item * authform_header
1.35      matthew  1525: 
1.112     bowersj2 1526: =item * authform_authorwarning
1.35      matthew  1527: 
1.112     bowersj2 1528: =item * authform_nochange
1.35      matthew  1529: 
1.112     bowersj2 1530: =item * authform_kerberos
1.35      matthew  1531: 
1.112     bowersj2 1532: =item * authform_internal
1.35      matthew  1533: 
1.112     bowersj2 1534: =item * authform_filesystem
1.35      matthew  1535: 
                   1536: =back
                   1537: 
1.157     matthew  1538: =back 
                   1539: 
1.35      matthew  1540: =cut
                   1541: 
                   1542: #-------------------------------------------
1.32      matthew  1543: sub authform_header{  
                   1544:     my %in = (
                   1545:         formname => 'cu',
1.80      albertel 1546:         kerb_def_dom => '',
1.32      matthew  1547:         @_,
                   1548:     );
                   1549:     $in{'formname'} = 'document.' . $in{'formname'};
                   1550:     my $result='';
1.80      albertel 1551: 
                   1552: #---------------------------------------------- Code for upper case translation
                   1553:     my $Javascript_toUpperCase;
                   1554:     unless ($in{kerb_def_dom}) {
                   1555:         $Javascript_toUpperCase =<<"END";
                   1556:         switch (choice) {
                   1557:            case 'krb': currentform.elements[choicearg].value =
                   1558:                currentform.elements[choicearg].value.toUpperCase();
                   1559:                break;
                   1560:            default:
                   1561:         }
                   1562: END
                   1563:     } else {
                   1564:         $Javascript_toUpperCase = "";
                   1565:     }
                   1566: 
1.165     raeburn  1567:     my $radioval = "'nochange'";
1.174     matthew  1568:     if (exists($in{'curr_authtype'}) &&
                   1569:         defined($in{'curr_authtype'}) &&
                   1570:         $in{'curr_authtype'} ne '') {
                   1571:         $radioval = "'$in{'curr_authtype'}arg'";
                   1572:     }
1.165     raeburn  1573:     my $argfield = 'null';
                   1574:     if ( grep/^mode$/,(keys %in) ) {
                   1575:         if ($in{'mode'} eq 'modifycourse')  {
                   1576:             if ( grep/^curr_authtype$/,(keys %in) ) {
                   1577:                 $radioval = "'$in{'curr_authtype'}'";
                   1578:             }
                   1579:             if ( grep/^curr_autharg$/,(keys %in) ) {
                   1580:                 unless ($in{'curr_autharg'} eq '') {
                   1581:                     $argfield = "'$in{'curr_autharg'}'";
                   1582:                 }
                   1583:             }
                   1584:         }
                   1585:     }
                   1586: 
1.32      matthew  1587:     $result.=<<"END";
                   1588: var current = new Object();
1.165     raeburn  1589: current.radiovalue = $radioval;
                   1590: current.argfield = $argfield;
1.32      matthew  1591: 
                   1592: function changed_radio(choice,currentform) {
                   1593:     var choicearg = choice + 'arg';
                   1594:     // If a radio button in changed, we need to change the argfield
                   1595:     if (current.radiovalue != choice) {
                   1596:         current.radiovalue = choice;
                   1597:         if (current.argfield != null) {
                   1598:             currentform.elements[current.argfield].value = '';
                   1599:         }
                   1600:         if (choice == 'nochange') {
                   1601:             current.argfield = null;
                   1602:         } else {
                   1603:             current.argfield = choicearg;
                   1604:             switch(choice) {
                   1605:                 case 'krb': 
                   1606:                     currentform.elements[current.argfield].value = 
                   1607:                         "$in{'kerb_def_dom'}";
                   1608:                 break;
                   1609:               default:
                   1610:                 break;
                   1611:             }
                   1612:         }
                   1613:     }
                   1614:     return;
                   1615: }
1.22      www      1616: 
1.32      matthew  1617: function changed_text(choice,currentform) {
                   1618:     var choicearg = choice + 'arg';
                   1619:     if (currentform.elements[choicearg].value !='') {
1.80      albertel 1620:         $Javascript_toUpperCase
1.32      matthew  1621:         // clear old field
                   1622:         if ((current.argfield != choicearg) && (current.argfield != null)) {
                   1623:             currentform.elements[current.argfield].value = '';
                   1624:         }
                   1625:         current.argfield = choicearg;
                   1626:     }
                   1627:     set_auth_radio_buttons(choice,currentform);
                   1628:     return;
1.20      www      1629: }
1.32      matthew  1630: 
                   1631: function set_auth_radio_buttons(newvalue,currentform) {
                   1632:     var i=0;
                   1633:     while (i < currentform.login.length) {
                   1634:         if (currentform.login[i].value == newvalue) { break; }
                   1635:         i++;
                   1636:     }
                   1637:     if (i == currentform.login.length) {
                   1638:         return;
                   1639:     }
                   1640:     current.radiovalue = newvalue;
                   1641:     currentform.login[i].checked = true;
                   1642:     return;
                   1643: }
                   1644: END
                   1645:     return $result;
                   1646: }
                   1647: 
                   1648: sub authform_authorwarning{
                   1649:     my $result='';
1.144     matthew  1650:     $result='<i>'.
                   1651:         &mt('As a general rule, only authors or co-authors should be '.
                   1652:             'filesystem authenticated '.
                   1653:             '(which allows access to the server filesystem).')."</i>\n";
1.32      matthew  1654:     return $result;
                   1655: }
                   1656: 
                   1657: sub authform_nochange{  
                   1658:     my %in = (
                   1659:               formname => 'document.cu',
                   1660:               kerb_def_dom => 'MSU.EDU',
                   1661:               @_,
                   1662:           );
1.281     albertel 1663:     my $result = '<label>'.&mt('[_1] Do not change login data',
1.144     matthew  1664:                      '<input type="radio" name="login" value="nochange" '.
                   1665:                      'checked="checked" onclick="'.
1.281     albertel 1666:             "javascript:changed_radio('nochange',$in{'formname'});".'" />').
                   1667: 	    '</label>';
1.32      matthew  1668:     return $result;
                   1669: }
                   1670: 
                   1671: sub authform_kerberos{  
                   1672:     my %in = (
                   1673:               formname => 'document.cu',
                   1674:               kerb_def_dom => 'MSU.EDU',
1.80      albertel 1675:               kerb_def_auth => 'krb4',
1.32      matthew  1676:               @_,
                   1677:               );
1.165     raeburn  1678:     my ($check4,$check5,$krbarg);
1.80      albertel 1679:     if ($in{'kerb_def_auth'} eq 'krb5') {
                   1680:        $check5 = " checked=\"on\"";
                   1681:     } else {
                   1682:        $check4 = " checked=\"on\"";
                   1683:     }
1.165     raeburn  1684:     $krbarg = $in{'kerb_def_dom'};
                   1685: 
                   1686:     my $krbcheck = "";
                   1687:     if ( grep/^curr_authtype$/,(keys %in) ) {
                   1688:         if ($in{'curr_authtype'} =~ m/^krb/) {
                   1689:             $krbcheck = " checked=\"on\"";
                   1690:             if ( grep/^curr_autharg$/,(keys %in) ) {
                   1691:                 $krbarg = $in{'curr_autharg'};
                   1692:             }
                   1693:         }
                   1694:     }
                   1695: 
1.144     matthew  1696:     my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
                   1697:     my $result .= &mt
                   1698:         ('[_1] Kerberos authenticated with domain [_2] '.
1.281     albertel 1699:          '[_3] Version 4 [_4] Version 5 [_5]',
                   1700:          '<label><input type="radio" name="login" value="krb" '.
1.165     raeburn  1701:              'onclick="'.$jscall.'" onchange="'.$jscall.'"'.$krbcheck.' />',
1.281     albertel 1702:          '</label><input type="text" size="10" name="krbarg" '.
1.165     raeburn  1703:              'value="'.$krbarg.'" '.
1.144     matthew  1704:              'onchange="'.$jscall.'" />',
1.281     albertel 1705:          '<label><input type="radio" name="krbver" value="4" '.$check4.' />',
                   1706:          '</label><label><input type="radio" name="krbver" value="5" '.$check5.' />',
                   1707: 	 '</label>');
1.32      matthew  1708:     return $result;
                   1709: }
                   1710: 
                   1711: sub authform_internal{  
                   1712:     my %args = (
                   1713:                 formname => 'document.cu',
                   1714:                 kerb_def_dom => 'MSU.EDU',
                   1715:                 @_,
                   1716:                 );
1.165     raeburn  1717: 
                   1718:     my $intcheck = "";
                   1719:     my $intarg = 'value=""';
                   1720:     if ( grep/^curr_authtype$/,(keys %args) ) {
                   1721:         if ($args{'curr_authtype'} eq 'int') {
                   1722:             $intcheck = " checked=\"on\"";
                   1723:             if ( grep/^curr_autharg$/,(keys %args) ) {
                   1724:                 $intarg = "value=\"$args{'curr_autharg'}\"";
                   1725:             }
                   1726:         }
                   1727:     }
                   1728: 
1.144     matthew  1729:     my $jscall = "javascript:changed_radio('int',$args{'formname'});";
                   1730:     my $result.=&mt
                   1731:         ('[_1] Internally authenticated (with initial password [_2])',
1.281     albertel 1732:          '<label><input type="radio" name="login" value="int" '.$intcheck.
1.165     raeburn  1733:              ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1.281     albertel 1734:          '</label><input type="text" size="10" name="intarg" '.$intarg.
1.165     raeburn  1735:              ' onchange="'.$jscall.'" />');
1.32      matthew  1736:     return $result;
                   1737: }
                   1738: 
                   1739: sub authform_local{  
                   1740:     my %in = (
                   1741:               formname => 'document.cu',
                   1742:               kerb_def_dom => 'MSU.EDU',
                   1743:               @_,
                   1744:               );
1.165     raeburn  1745: 
                   1746:     my $loccheck = "";
                   1747:     my $locarg = 'value=""';
                   1748:     if ( grep/^curr_authtype$/,(keys %in) ) {
                   1749:         if ($in{'curr_authtype'} eq 'loc') {
                   1750:             $loccheck = " checked=\"on\"";
                   1751:             if ( grep/^curr_autharg$/,(keys %in) ) {
                   1752:                 $locarg = "value=\"$in{'curr_autharg'}\"";
                   1753:             }
                   1754:         }
                   1755:     }
                   1756: 
1.144     matthew  1757:     my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
1.160     matthew  1758:     my $result.=&mt('[_1] Local Authentication with argument [_2]',
1.281     albertel 1759:                     '<label><input type="radio" name="login" value="loc" '.$loccheck.
1.165     raeburn  1760:                         ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1.281     albertel 1761:                     '</label><input type="text" size="10" name="locarg" '.$locarg.
1.165     raeburn  1762:                         ' onchange="'.$jscall.'" />');
1.32      matthew  1763:     return $result;
                   1764: }
                   1765: 
                   1766: sub authform_filesystem{  
                   1767:     my %in = (
                   1768:               formname => 'document.cu',
                   1769:               kerb_def_dom => 'MSU.EDU',
                   1770:               @_,
                   1771:               );
1.144     matthew  1772:     my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
                   1773:     my $result.= &mt
                   1774:         ('[_1] Filesystem Authenticated (with initial password [_2])',
1.281     albertel 1775:          '<label><input type="radio" name="login" value="fsys" '.
1.144     matthew  1776:          'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1.281     albertel 1777:          '</label><input type="text" size="10" name="fsysarg" value="" '.
1.144     matthew  1778:                   'onchange="'.$jscall.'" />');
1.32      matthew  1779:     return $result;
                   1780: }
                   1781: 
1.80      albertel 1782: ###############################################################
                   1783: ##    Get Authentication Defaults for Domain                 ##
                   1784: ###############################################################
                   1785: 
                   1786: =pod
                   1787: 
1.112     bowersj2 1788: =head1 Domains and Authentication
                   1789: 
                   1790: Returns default authentication type and an associated argument as
                   1791: listed in file 'domain.tab'.
                   1792: 
                   1793: =over 4
                   1794: 
                   1795: =item * get_auth_defaults
1.80      albertel 1796: 
                   1797: get_auth_defaults($target_domain) returns the default authentication
                   1798: type and an associated argument (initial password or a kerberos domain).
                   1799: These values are stored in lonTabs/domain.tab
                   1800: 
                   1801: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
                   1802: 
                   1803: If target_domain is not found in domain.tab, returns nothing ('').
                   1804: 
                   1805: =cut
                   1806: 
                   1807: #-------------------------------------------
                   1808: sub get_auth_defaults {
                   1809:     my $domain=shift;
                   1810:     return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
                   1811: }
                   1812: ###############################################################
                   1813: ##   End Get Authentication Defaults for Domain              ##
                   1814: ###############################################################
                   1815: 
                   1816: ###############################################################
                   1817: ##    Get Kerberos Defaults for Domain                 ##
                   1818: ###############################################################
                   1819: ##
                   1820: ## Returns default kerberos version and an associated argument
                   1821: ## as listed in file domain.tab. If not listed, provides
                   1822: ## appropriate default domain and kerberos version.
                   1823: ##
                   1824: #-------------------------------------------
                   1825: 
                   1826: =pod
                   1827: 
1.112     bowersj2 1828: =item * get_kerberos_defaults
1.80      albertel 1829: 
                   1830: get_kerberos_defaults($target_domain) returns the default kerberos
                   1831: version and domain. If not found in domain.tabs, it defaults to
                   1832: version 4 and the domain of the server.
                   1833: 
                   1834: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
                   1835: 
                   1836: =cut
                   1837: 
                   1838: #-------------------------------------------
                   1839: sub get_kerberos_defaults {
                   1840:     my $domain=shift;
                   1841:     my ($krbdef,$krbdefdom) =
                   1842:         &Apache::loncommon::get_auth_defaults($domain);
                   1843:     unless ($krbdef =~/^krb/ && $krbdefdom) {
                   1844:         $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
                   1845:         my $krbdefdom=$1;
                   1846:         $krbdefdom=~tr/a-z/A-Z/;
                   1847:         $krbdef = "krb4";
                   1848:     }
                   1849:     return ($krbdef,$krbdefdom);
                   1850: }
1.112     bowersj2 1851: 
                   1852: =pod
                   1853: 
                   1854: =back
                   1855: 
                   1856: =cut
1.32      matthew  1857: 
1.46      matthew  1858: ###############################################################
                   1859: ##                Thesaurus Functions                        ##
                   1860: ###############################################################
1.20      www      1861: 
1.46      matthew  1862: =pod
1.20      www      1863: 
1.112     bowersj2 1864: =head1 Thesaurus Functions
                   1865: 
                   1866: =over 4
                   1867: 
                   1868: =item * initialize_keywords
1.46      matthew  1869: 
                   1870: Initializes the package variable %Keywords if it is empty.  Uses the
                   1871: package variable $thesaurus_db_file.
                   1872: 
                   1873: =cut
                   1874: 
                   1875: ###################################################
                   1876: 
                   1877: sub initialize_keywords {
                   1878:     return 1 if (scalar keys(%Keywords));
                   1879:     # If we are here, %Keywords is empty, so fill it up
                   1880:     #   Make sure the file we need exists...
                   1881:     if (! -e $thesaurus_db_file) {
                   1882:         &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
                   1883:                                  " failed because it does not exist");
                   1884:         return 0;
                   1885:     }
                   1886:     #   Set up the hash as a database
                   1887:     my %thesaurus_db;
                   1888:     if (! tie(%thesaurus_db,'GDBM_File',
1.53      albertel 1889:               $thesaurus_db_file,&GDBM_READER(),0640)){
1.46      matthew  1890:         &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
                   1891:                                  $thesaurus_db_file);
                   1892:         return 0;
                   1893:     } 
                   1894:     #  Get the average number of appearances of a word.
                   1895:     my $avecount = $thesaurus_db{'average.count'};
                   1896:     #  Put keywords (those that appear > average) into %Keywords
                   1897:     while (my ($word,$data)=each (%thesaurus_db)) {
                   1898:         my ($count,undef) = split /:/,$data;
                   1899:         $Keywords{$word}++ if ($count > $avecount);
                   1900:     }
                   1901:     untie %thesaurus_db;
                   1902:     # Remove special values from %Keywords.
1.356     albertel 1903:     foreach my $value ('total.count','average.count') {
                   1904:         delete($Keywords{$value}) if (exists($Keywords{$value}));
1.46      matthew  1905:     }
                   1906:     return 1;
                   1907: }
                   1908: 
                   1909: ###################################################
                   1910: 
                   1911: =pod
                   1912: 
1.112     bowersj2 1913: =item * keyword($word)
1.46      matthew  1914: 
                   1915: Returns true if $word is a keyword.  A keyword is a word that appears more 
                   1916: than the average number of times in the thesaurus database.  Calls 
                   1917: &initialize_keywords
                   1918: 
                   1919: =cut
                   1920: 
                   1921: ###################################################
1.20      www      1922: 
                   1923: sub keyword {
1.46      matthew  1924:     return if (!&initialize_keywords());
                   1925:     my $word=lc(shift());
                   1926:     $word=~s/\W//g;
                   1927:     return exists($Keywords{$word});
1.20      www      1928: }
1.46      matthew  1929: 
                   1930: ###############################################################
                   1931: 
                   1932: =pod 
1.20      www      1933: 
1.112     bowersj2 1934: =item * get_related_words
1.46      matthew  1935: 
1.160     matthew  1936: Look up a word in the thesaurus.  Takes a scalar argument and returns
1.46      matthew  1937: an array of words.  If the keyword is not in the thesaurus, an empty array
                   1938: will be returned.  The order of the words returned is determined by the
                   1939: database which holds them.
                   1940: 
                   1941: Uses global $thesaurus_db_file.
                   1942: 
                   1943: =cut
                   1944: 
                   1945: ###############################################################
                   1946: sub get_related_words {
                   1947:     my $keyword = shift;
                   1948:     my %thesaurus_db;
                   1949:     if (! -e $thesaurus_db_file) {
                   1950:         &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
                   1951:                                  "failed because the file does not exist");
                   1952:         return ();
                   1953:     }
                   1954:     if (! tie(%thesaurus_db,'GDBM_File',
1.53      albertel 1955:               $thesaurus_db_file,&GDBM_READER(),0640)){
1.46      matthew  1956:         return ();
                   1957:     } 
                   1958:     my @Words=();
1.429     www      1959:     my $count=0;
1.46      matthew  1960:     if (exists($thesaurus_db{$keyword})) {
1.356     albertel 1961: 	# The first element is the number of times
                   1962: 	# the word appears.  We do not need it now.
1.429     www      1963: 	my (undef,@RelatedWords) = (split(/:/,$thesaurus_db{$keyword}));
                   1964: 	my (undef,$mostfrequentcount)=split(/\,/,$RelatedWords[0]);
                   1965: 	my $threshold=$mostfrequentcount/10;
                   1966:         foreach my $possibleword (@RelatedWords) {
                   1967:             my ($word,$wordcount)=split(/\,/,$possibleword);
                   1968:             if ($wordcount>$threshold) {
                   1969: 		push(@Words,$word);
                   1970:                 $count++;
                   1971:                 if ($count>10) { last; }
                   1972: 	    }
1.20      www      1973:         }
                   1974:     }
1.46      matthew  1975:     untie %thesaurus_db;
                   1976:     return @Words;
1.14      harris41 1977: }
1.46      matthew  1978: 
1.112     bowersj2 1979: =pod
                   1980: 
                   1981: =back
                   1982: 
                   1983: =cut
1.61      www      1984: 
                   1985: # -------------------------------------------------------------- Plaintext name
1.81      albertel 1986: =pod
                   1987: 
1.112     bowersj2 1988: =head1 User Name Functions
                   1989: 
                   1990: =over 4
                   1991: 
1.226     albertel 1992: =item * plainname($uname,$udom,$first)
1.81      albertel 1993: 
1.112     bowersj2 1994: Takes a users logon name and returns it as a string in
1.226     albertel 1995: "first middle last generation" form 
                   1996: if $first is set to 'lastname' then it returns it as
                   1997: 'lastname generation, firstname middlename' if their is a lastname
1.81      albertel 1998: 
                   1999: =cut
1.61      www      2000: 
1.295     www      2001: 
1.81      albertel 2002: ###############################################################
1.61      www      2003: sub plainname {
1.226     albertel 2004:     my ($uname,$udom,$first)=@_;
1.295     www      2005:     my %names=&getnames($uname,$udom);
1.226     albertel 2006:     my $name=&Apache::lonnet::format_name($names{'firstname'},
                   2007: 					  $names{'middlename'},
                   2008: 					  $names{'lastname'},
                   2009: 					  $names{'generation'},$first);
                   2010:     $name=~s/^\s+//;
1.62      www      2011:     $name=~s/\s+$//;
                   2012:     $name=~s/\s+/ /g;
1.353     albertel 2013:     if ($name !~ /\S/) { $name=$uname.':'.$udom; }
1.62      www      2014:     return $name;
1.61      www      2015: }
1.66      www      2016: 
                   2017: # -------------------------------------------------------------------- Nickname
1.81      albertel 2018: =pod
                   2019: 
1.112     bowersj2 2020: =item * nickname($uname,$udom)
1.81      albertel 2021: 
                   2022: Gets a users name and returns it as a string as
                   2023: 
                   2024: "&quot;nickname&quot;"
1.66      www      2025: 
1.81      albertel 2026: if the user has a nickname or
                   2027: 
                   2028: "first middle last generation"
                   2029: 
                   2030: if the user does not
                   2031: 
                   2032: =cut
1.66      www      2033: 
                   2034: sub nickname {
                   2035:     my ($uname,$udom)=@_;
1.295     www      2036:     my %names=&getnames($uname,$udom);
1.68      albertel 2037:     my $name=$names{'nickname'};
1.66      www      2038:     if ($name) {
                   2039:        $name='&quot;'.$name.'&quot;'; 
                   2040:     } else {
                   2041:        $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
                   2042: 	     $names{'lastname'}.' '.$names{'generation'};
                   2043:        $name=~s/\s+$//;
                   2044:        $name=~s/\s+/ /g;
                   2045:     }
                   2046:     return $name;
                   2047: }
                   2048: 
1.295     www      2049: sub getnames {
                   2050:     my ($uname,$udom)=@_;
                   2051:     my $id=$uname.':'.$udom;
                   2052:     my ($names,$cached)=&Apache::lonnet::is_cached_new('namescache',$id);
                   2053:     if ($cached) {
                   2054: 	return %{$names};
                   2055:     } else {
                   2056: 	my %loadnames=&Apache::lonnet::get('environment',
                   2057:                     ['firstname','middlename','lastname','generation','nickname'],
                   2058: 					 $udom,$uname);
                   2059: 	&Apache::lonnet::do_cache_new('namescache',$id,\%loadnames);
                   2060: 	return %loadnames;
                   2061:     }
                   2062: }
1.61      www      2063: 
                   2064: # ------------------------------------------------------------------ Screenname
1.81      albertel 2065: 
                   2066: =pod
                   2067: 
1.112     bowersj2 2068: =item * screenname($uname,$udom)
1.81      albertel 2069: 
                   2070: Gets a users screenname and returns it as a string
                   2071: 
                   2072: =cut
1.61      www      2073: 
                   2074: sub screenname {
                   2075:     my ($uname,$udom)=@_;
1.258     albertel 2076:     if ($uname eq $env{'user.name'} &&
                   2077: 	$udom eq $env{'user.domain'}) {return $env{'environment.screenname'};}
1.212     albertel 2078:     my %names=&Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1.68      albertel 2079:     return $names{'screenname'};
1.62      www      2080: }
                   2081: 
1.212     albertel 2082: 
1.62      www      2083: # ------------------------------------------------------------- Message Wrapper
                   2084: 
                   2085: sub messagewrapper {
1.369     www      2086:     my ($link,$username,$domain,$subject,$text)=@_;
1.62      www      2087:     return 
1.200     matthew  2088:         '<a href="/adm/email?compose=individual&'.
1.369     www      2089:         'recname='.$username.'&recdom='.$domain.
                   2090: 	'&subject='.&escape($subject).'&text='.&escape($text).'" '.
1.200     matthew  2091:         'title="'.&mt('Send message').'">'.$link.'</a>';
1.74      www      2092: }
                   2093: # --------------------------------------------------------------- Notes Wrapper
                   2094: 
                   2095: sub noteswrapper {
                   2096:     my ($link,$un,$do)=@_;
                   2097:     return 
                   2098: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1.62      www      2099: }
                   2100: # ------------------------------------------------------------- Aboutme Wrapper
                   2101: 
                   2102: sub aboutmewrapper {
1.166     www      2103:     my ($link,$username,$domain,$target)=@_;
1.205     www      2104:     return '<a href="/adm/'.$domain.'/'.$username.'/aboutme"'.
1.200     matthew  2105: 	($target?' target="$target"':'').' title="'.&mt('View this users personal page').'">'.$link.'</a>';
1.62      www      2106: }
                   2107: 
                   2108: # ------------------------------------------------------------ Syllabus Wrapper
                   2109: 
                   2110: 
                   2111: sub syllabuswrapper {
1.109     matthew  2112:     my ($linktext,$coursedir,$domain,$fontcolor)=@_;
                   2113:     if ($fontcolor) { 
                   2114:         $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>'; 
                   2115:     }
1.208     matthew  2116:     return qq{<a href="/public/$domain/$coursedir/syllabus">$linktext</a>};
1.61      www      2117: }
1.14      harris41 2118: 
1.208     matthew  2119: sub track_student_link {
1.268     albertel 2120:     my ($linktext,$sname,$sdom,$target,$start) = @_;
                   2121:     my $link ="/adm/trackstudent?";
1.208     matthew  2122:     my $title = 'View recent activity';
                   2123:     if (defined($sname) && $sname !~ /^\s*$/ &&
                   2124:         defined($sdom)  && $sdom  !~ /^\s*$/) {
1.268     albertel 2125:         $link .= "selected_student=$sname:$sdom";
1.208     matthew  2126:         $title .= ' of this student';
1.268     albertel 2127:     } 
1.208     matthew  2128:     if (defined($target) && $target !~ /^\s*$/) {
                   2129:         $target = qq{target="$target"};
                   2130:     } else {
                   2131:         $target = '';
                   2132:     }
1.268     albertel 2133:     if ($start) { $link.='&amp;start='.$start; }
1.208     matthew  2134:     return qq{<a href="$link" title="$title" $target>$linktext</a>};
                   2135: }
                   2136: 
1.112     bowersj2 2137: =pod
                   2138: 
                   2139: =back
                   2140: 
                   2141: =head1 Access .tab File Data
                   2142: 
                   2143: =over 4
                   2144: 
                   2145: =item * languageids() 
                   2146: 
                   2147: returns list of all language ids
                   2148: 
                   2149: =cut
                   2150: 
1.14      harris41 2151: sub languageids {
1.16      harris41 2152:     return sort(keys(%language));
1.14      harris41 2153: }
                   2154: 
1.112     bowersj2 2155: =pod
                   2156: 
                   2157: =item * languagedescription() 
                   2158: 
                   2159: returns description of a specified language id
                   2160: 
                   2161: =cut
                   2162: 
1.14      harris41 2163: sub languagedescription {
1.125     www      2164:     my $code=shift;
                   2165:     return  ($supported_language{$code}?'* ':'').
                   2166:             $language{$code}.
1.126     www      2167: 	    ($supported_language{$code}?' ('.&mt('interface available').')':'');
1.145     www      2168: }
                   2169: 
                   2170: sub plainlanguagedescription {
                   2171:     my $code=shift;
                   2172:     return $language{$code};
                   2173: }
                   2174: 
                   2175: sub supportedlanguagecode {
                   2176:     my $code=shift;
                   2177:     return $supported_language{$code};
1.97      www      2178: }
                   2179: 
1.112     bowersj2 2180: =pod
                   2181: 
                   2182: =item * copyrightids() 
                   2183: 
                   2184: returns list of all copyrights
                   2185: 
                   2186: =cut
                   2187: 
                   2188: sub copyrightids {
                   2189:     return sort(keys(%cprtag));
                   2190: }
                   2191: 
                   2192: =pod
                   2193: 
                   2194: =item * copyrightdescription() 
                   2195: 
                   2196: returns description of a specified copyright id
                   2197: 
                   2198: =cut
                   2199: 
                   2200: sub copyrightdescription {
1.166     www      2201:     return &mt($cprtag{shift(@_)});
1.112     bowersj2 2202: }
1.197     matthew  2203: 
                   2204: =pod
                   2205: 
1.192     taceyjo1 2206: =item * source_copyrightids() 
                   2207: 
                   2208: returns list of all source copyrights
                   2209: 
                   2210: =cut
                   2211: 
                   2212: sub source_copyrightids {
                   2213:     return sort(keys(%scprtag));
                   2214: }
                   2215: 
                   2216: =pod
                   2217: 
                   2218: =item * source_copyrightdescription() 
                   2219: 
                   2220: returns description of a specified source copyright id
                   2221: 
                   2222: =cut
                   2223: 
                   2224: sub source_copyrightdescription {
                   2225:     return &mt($scprtag{shift(@_)});
                   2226: }
1.112     bowersj2 2227: 
                   2228: =pod
                   2229: 
                   2230: =item * filecategories() 
                   2231: 
                   2232: returns list of all file categories
                   2233: 
                   2234: =cut
                   2235: 
                   2236: sub filecategories {
                   2237:     return sort(keys(%category_extensions));
                   2238: }
                   2239: 
                   2240: =pod
                   2241: 
                   2242: =item * filecategorytypes() 
                   2243: 
                   2244: returns list of file types belonging to a given file
                   2245: category
                   2246: 
                   2247: =cut
                   2248: 
                   2249: sub filecategorytypes {
1.356     albertel 2250:     my ($cat) = @_;
                   2251:     return @{$category_extensions{lc($cat)}};
1.112     bowersj2 2252: }
                   2253: 
                   2254: =pod
                   2255: 
                   2256: =item * fileembstyle() 
                   2257: 
                   2258: returns embedding style for a specified file type
                   2259: 
                   2260: =cut
                   2261: 
                   2262: sub fileembstyle {
                   2263:     return $fe{lc(shift(@_))};
1.169     www      2264: }
                   2265: 
1.351     www      2266: sub filemimetype {
                   2267:     return $fm{lc(shift(@_))};
                   2268: }
                   2269: 
1.169     www      2270: 
                   2271: sub filecategoryselect {
                   2272:     my ($name,$value)=@_;
1.189     matthew  2273:     return &select_form($value,$name,
1.169     www      2274: 			'' => &mt('Any category'),
                   2275: 			map { $_,$_ } sort(keys(%category_extensions)));
1.112     bowersj2 2276: }
                   2277: 
                   2278: =pod
                   2279: 
                   2280: =item * filedescription() 
                   2281: 
                   2282: returns description for a specified file type
                   2283: 
                   2284: =cut
                   2285: 
                   2286: sub filedescription {
1.188     matthew  2287:     my $file_description = $fd{lc(shift())};
                   2288:     $file_description =~ s:([\[\]]):~$1:g;
                   2289:     return &mt($file_description);
1.112     bowersj2 2290: }
                   2291: 
                   2292: =pod
                   2293: 
                   2294: =item * filedescriptionex() 
                   2295: 
                   2296: returns description for a specified file type with
                   2297: extra formatting
                   2298: 
                   2299: =cut
                   2300: 
                   2301: sub filedescriptionex {
                   2302:     my $ex=shift;
1.188     matthew  2303:     my $file_description = $fd{lc($ex)};
                   2304:     $file_description =~ s:([\[\]]):~$1:g;
                   2305:     return '.'.$ex.' '.&mt($file_description);
1.112     bowersj2 2306: }
                   2307: 
                   2308: # End of .tab access
                   2309: =pod
                   2310: 
                   2311: =back
                   2312: 
                   2313: =cut
                   2314: 
                   2315: # ------------------------------------------------------------------ File Types
                   2316: sub fileextensions {
                   2317:     return sort(keys(%fe));
                   2318: }
                   2319: 
1.97      www      2320: # ----------------------------------------------------------- Display Languages
                   2321: # returns a hash with all desired display languages
                   2322: #
                   2323: 
                   2324: sub display_languages {
                   2325:     my %languages=();
1.356     albertel 2326:     foreach my $lang (&preferred_languages()) {
                   2327: 	$languages{$lang}=1;
1.97      www      2328:     }
                   2329:     &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1.258     albertel 2330:     if ($env{'form.displaylanguage'}) {
1.356     albertel 2331: 	foreach my $lang (split(/\s*(\,|\;|\:)\s*/,$env{'form.displaylanguage'})) {
                   2332: 	    $languages{$lang}=1;
1.97      www      2333:         }
                   2334:     }
                   2335:     return %languages;
1.14      harris41 2336: }
                   2337: 
1.117     www      2338: sub preferred_languages {
                   2339:     my @languages=();
1.258     albertel 2340:     if ($env{'course.'.$env{'request.course.id'}.'.languages'}) {
1.117     www      2341: 	@languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
1.258     albertel 2342: 	         $env{'course.'.$env{'request.course.id'}.'.languages'}));
1.177     www      2343:     }
1.258     albertel 2344:     if ($env{'environment.languages'}) {
                   2345: 	@languages=split(/\s*(\,|\;|\:)\s*/,$env{'environment.languages'});
1.118     www      2346:     }
1.162     www      2347:     my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
                   2348:     if ($browser) {
                   2349: 	@languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
                   2350:     }
1.258     albertel 2351:     if ($Apache::lonnet::domain_lang_def{$env{'user.domain'}}) {
1.118     www      2352: 	@languages=(@languages,
1.258     albertel 2353: 		$Apache::lonnet::domain_lang_def{$env{'user.domain'}});
1.118     www      2354:     }
1.258     albertel 2355:     if ($Apache::lonnet::domain_lang_def{$env{'request.role.domain'}}) {
1.118     www      2356: 	@languages=(@languages,
1.258     albertel 2357: 		$Apache::lonnet::domain_lang_def{$env{'request.role.domain'}});
1.118     www      2358:     }
                   2359:     if ($Apache::lonnet::domain_lang_def{
                   2360: 	                          $Apache::lonnet::perlvar{'lonDefDomain'}}) {
                   2361: 	@languages=(@languages,
                   2362: 		$Apache::lonnet::domain_lang_def{
                   2363:                                   $Apache::lonnet::perlvar{'lonDefDomain'}});
                   2364:     }
                   2365: # turn "en-ca" into "en-ca,en"
                   2366:     my @genlanguages;
1.356     albertel 2367:     foreach my $lang (@languages) {
                   2368: 	unless ($lang=~/\w/) { next; }
                   2369: 	push (@genlanguages,$lang);
                   2370: 	if ($lang=~/(\-|\_)/) {
                   2371: 	    push(@genlanguages,(split(/(\-|\_)/,$lang))[0]);
1.118     www      2372: 	}
                   2373:     }
                   2374:     return @genlanguages;
1.117     www      2375: }
                   2376: 
1.112     bowersj2 2377: ###############################################################
                   2378: ##               Student Answer Attempts                     ##
                   2379: ###############################################################
                   2380: 
                   2381: =pod
                   2382: 
                   2383: =head1 Alternate Problem Views
                   2384: 
                   2385: =over 4
                   2386: 
                   2387: =item * get_previous_attempt($symb, $username, $domain, $course,
                   2388:     $getattempt, $regexp, $gradesub)
                   2389: 
                   2390: Return string with previous attempt on problem. Arguments:
                   2391: 
                   2392: =over 4
                   2393: 
                   2394: =item * $symb: Problem, including path
                   2395: 
                   2396: =item * $username: username of the desired student
                   2397: 
                   2398: =item * $domain: domain of the desired student
1.14      harris41 2399: 
1.112     bowersj2 2400: =item * $course: Course ID
1.14      harris41 2401: 
1.112     bowersj2 2402: =item * $getattempt: Leave blank for all attempts, otherwise put
                   2403:     something
1.14      harris41 2404: 
1.112     bowersj2 2405: =item * $regexp: if string matches this regexp, the string will be
                   2406:     sent to $gradesub
1.14      harris41 2407: 
1.112     bowersj2 2408: =item * $gradesub: routine that processes the string if it matches $regexp
1.14      harris41 2409: 
1.112     bowersj2 2410: =back
1.14      harris41 2411: 
1.112     bowersj2 2412: The output string is a table containing all desired attempts, if any.
1.16      harris41 2413: 
1.112     bowersj2 2414: =cut
1.1       albertel 2415: 
                   2416: sub get_previous_attempt {
1.43      ng       2417:   my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1.1       albertel 2418:   my $prevattempts='';
1.43      ng       2419:   no strict 'refs';
1.1       albertel 2420:   if ($symb) {
1.3       albertel 2421:     my (%returnhash)=
                   2422:       &Apache::lonnet::restore($symb,$course,$domain,$username);
1.1       albertel 2423:     if ($returnhash{'version'}) {
                   2424:       my %lasthash=();
                   2425:       my $version;
                   2426:       for ($version=1;$version<=$returnhash{'version'};$version++) {
1.356     albertel 2427:         foreach my $key (sort(split(/\:/,$returnhash{$version.':keys'}))) {
                   2428: 	  $lasthash{$key}=$returnhash{$version.':'.$key};
1.19      harris41 2429:         }
1.1       albertel 2430:       }
1.43      ng       2431:       $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1.40      ng       2432:       $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1.356     albertel 2433:       foreach my $key (sort(keys(%lasthash))) {
                   2434: 	my ($ign,@parts) = split(/\./,$key);
1.41      ng       2435: 	if ($#parts > 0) {
1.31      albertel 2436: 	  my $data=$parts[-1];
                   2437: 	  pop(@parts);
1.40      ng       2438: 	  $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.'&nbsp;</td>';
1.31      albertel 2439: 	} else {
1.41      ng       2440: 	  if ($#parts == 0) {
                   2441: 	    $prevattempts.='<th>'.$parts[0].'</th>';
                   2442: 	  } else {
                   2443: 	    $prevattempts.='<th>'.$ign.'</th>';
                   2444: 	  }
1.31      albertel 2445: 	}
1.16      harris41 2446:       }
1.40      ng       2447:       if ($getattempt eq '') {
                   2448: 	for ($version=1;$version<=$returnhash{'version'};$version++) {
                   2449: 	  $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1.356     albertel 2450: 	    foreach my $key (sort(keys(%lasthash))) {
1.40      ng       2451: 	       my $value;
1.356     albertel 2452: 	       if ($key =~ /timestamp/) {
                   2453: 		  $value=scalar(localtime($returnhash{$version.':'.$key}));
1.40      ng       2454: 	       } else {
1.356     albertel 2455: 		  $value=$returnhash{$version.':'.$key};
1.40      ng       2456: 	       }
1.369     www      2457: 	       $prevattempts.='<td>'.&unescape($value).'&nbsp;</td>';   
1.40      ng       2458: 	    }
                   2459: 	 }
1.1       albertel 2460:       }
1.40      ng       2461:       $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1.356     albertel 2462:       foreach my $key (sort(keys(%lasthash))) {
1.5       albertel 2463: 	my $value;
1.356     albertel 2464: 	if ($key =~ /timestamp/) {
                   2465: 	  $value=scalar(localtime($lasthash{$key}));
1.5       albertel 2466: 	} else {
1.356     albertel 2467: 	  $value=$lasthash{$key};
1.5       albertel 2468: 	}
1.369     www      2469: 	$value=&unescape($value);
1.356     albertel 2470: 	if ($key =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1.40      ng       2471: 	$prevattempts.='<td>'.$value.'&nbsp;</td>';
1.16      harris41 2472:       }
1.40      ng       2473:       $prevattempts.='</tr></table></td></tr></table>';
1.1       albertel 2474:     } else {
                   2475:       $prevattempts='Nothing submitted - no attempts.';
                   2476:     }
                   2477:   } else {
                   2478:     $prevattempts='No data.';
                   2479:   }
1.10      albertel 2480: }
                   2481: 
1.107     albertel 2482: sub relative_to_absolute {
                   2483:     my ($url,$output)=@_;
                   2484:     my $parser=HTML::TokeParser->new(\$output);
                   2485:     my $token;
                   2486:     my $thisdir=$url;
                   2487:     my @rlinks=();
                   2488:     while ($token=$parser->get_token) {
                   2489: 	if ($token->[0] eq 'S') {
                   2490: 	    if ($token->[1] eq 'a') {
                   2491: 		if ($token->[2]->{'href'}) {
                   2492: 		    $rlinks[$#rlinks+1]=$token->[2]->{'href'};
                   2493: 		}
                   2494: 	    } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
                   2495: 		$rlinks[$#rlinks+1]=$token->[2]->{'src'};
                   2496: 	    } elsif ($token->[1] eq 'base') {
                   2497: 		$thisdir=$token->[2]->{'href'};
                   2498: 	    }
                   2499: 	}
                   2500:     }
                   2501:     $thisdir=~s-/[^/]*$--;
1.356     albertel 2502:     foreach my $link (@rlinks) {
                   2503: 	unless (($link=~/^http:\/\//i) ||
                   2504: 		($link=~/^\//) ||
                   2505: 		($link=~/^javascript:/i) ||
                   2506: 		($link=~/^mailto:/i) ||
                   2507: 		($link=~/^\#/)) {
                   2508: 	    my $newlocation=&Apache::lonnet::hreflocation($thisdir,$link);
                   2509: 	    $output=~s/(\"|\'|\=\s*)\Q$link\E(\"|\'|\s|\>)/$1$newlocation$2/;
1.107     albertel 2510: 	}
                   2511:     }
                   2512: # -------------------------------------------------- Deal with Applet codebases
                   2513:     $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
                   2514:     return $output;
                   2515: }
                   2516: 
1.112     bowersj2 2517: =pod
                   2518: 
                   2519: =item * get_student_view
                   2520: 
                   2521: show a snapshot of what student was looking at
                   2522: 
                   2523: =cut
                   2524: 
1.10      albertel 2525: sub get_student_view {
1.186     albertel 2526:   my ($symb,$username,$domain,$courseid,$target,$moreenv) = @_;
1.114     www      2527:   my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1.186     albertel 2528:   my (%form);
1.10      albertel 2529:   my @elements=('symb','courseid','domain','username');
                   2530:   foreach my $element (@elements) {
1.186     albertel 2531:       $form{'grade_'.$element}=eval '$'.$element #'
1.10      albertel 2532:   }
1.186     albertel 2533:   if (defined($moreenv)) {
                   2534:       %form=(%form,%{$moreenv});
                   2535:   }
1.236     albertel 2536:   if (defined($target)) { $form{'grade_target'} = $target; }
1.107     albertel 2537:   $feedurl=&Apache::lonnet::clutter($feedurl);
1.186     albertel 2538:   my $userview=&Apache::lonnet::ssi_body($feedurl,%form);
1.11      albertel 2539:   $userview=~s/\<body[^\>]*\>//gi;
                   2540:   $userview=~s/\<\/body\>//gi;
                   2541:   $userview=~s/\<html\>//gi;
                   2542:   $userview=~s/\<\/html\>//gi;
                   2543:   $userview=~s/\<head\>//gi;
                   2544:   $userview=~s/\<\/head\>//gi;
                   2545:   $userview=~s/action\s*\=/would_be_action\=/gi;
1.107     albertel 2546:   $userview=&relative_to_absolute($feedurl,$userview);
1.11      albertel 2547:   return $userview;
                   2548: }
                   2549: 
1.112     bowersj2 2550: =pod
                   2551: 
                   2552: =item * get_student_answers() 
                   2553: 
                   2554: show a snapshot of how student was answering problem
                   2555: 
                   2556: =cut
                   2557: 
1.11      albertel 2558: sub get_student_answers {
1.100     sakharuk 2559:   my ($symb,$username,$domain,$courseid,%form) = @_;
1.114     www      2560:   my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1.186     albertel 2561:   my (%moreenv);
1.11      albertel 2562:   my @elements=('symb','courseid','domain','username');
                   2563:   foreach my $element (@elements) {
1.186     albertel 2564:     $moreenv{'grade_'.$element}=eval '$'.$element #'
1.10      albertel 2565:   }
1.186     albertel 2566:   $moreenv{'grade_target'}='answer';
                   2567:   %moreenv=(%form,%moreenv);
                   2568:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%moreenv);
1.10      albertel 2569:   return $userview;
1.1       albertel 2570: }
1.116     albertel 2571: 
                   2572: =pod
                   2573: 
                   2574: =item * &submlink()
                   2575: 
1.242     albertel 2576: Inputs: $text $uname $udom $symb $target
1.116     albertel 2577: 
                   2578: Returns: A link to grades.pm such as to see the SUBM view of a student
                   2579: 
                   2580: =cut
                   2581: 
                   2582: ###############################################
                   2583: sub submlink {
1.242     albertel 2584:     my ($text,$uname,$udom,$symb,$target)=@_;
1.116     albertel 2585:     if (!($uname && $udom)) {
                   2586: 	(my $cursymb, my $courseid,$udom,$uname)=
                   2587: 	    &Apache::lonxml::whichuser($symb);
                   2588: 	if (!$symb) { $symb=$cursymb; }
                   2589:     }
1.254     matthew  2590:     if (!$symb) { $symb=&Apache::lonnet::symbread(); }
1.369     www      2591:     $symb=&escape($symb);
1.242     albertel 2592:     if ($target) { $target="target=\"$target\""; }
                   2593:     return '<a href="/adm/grades?&command=submission&'.
                   2594: 	'symb='.$symb.'&student='.$uname.
                   2595: 	'&userdom='.$udom.'" '.$target.'>'.$text.'</a>';
                   2596: }
                   2597: ##############################################
                   2598: 
                   2599: =pod
                   2600: 
                   2601: =item * &pgrdlink()
                   2602: 
                   2603: Inputs: $text $uname $udom $symb $target
                   2604: 
                   2605: Returns: A link to grades.pm such as to see the PGRD view of a student
                   2606: 
                   2607: =cut
                   2608: 
                   2609: ###############################################
                   2610: sub pgrdlink {
                   2611:     my $link=&submlink(@_);
                   2612:     $link=~s/(&command=submission)/$1&showgrading=yes/;
                   2613:     return $link;
                   2614: }
                   2615: ##############################################
                   2616: 
                   2617: =pod
                   2618: 
                   2619: =item * &pprmlink()
                   2620: 
                   2621: Inputs: $text $uname $udom $symb $target
                   2622: 
                   2623: Returns: A link to parmset.pm such as to see the PPRM view of a
1.283     albertel 2624: student and a specific resource
1.242     albertel 2625: 
                   2626: =cut
                   2627: 
                   2628: ###############################################
                   2629: sub pprmlink {
                   2630:     my ($text,$uname,$udom,$symb,$target)=@_;
                   2631:     if (!($uname && $udom)) {
                   2632: 	(my $cursymb, my $courseid,$udom,$uname)=
                   2633: 	    &Apache::lonxml::whichuser($symb);
                   2634: 	if (!$symb) { $symb=$cursymb; }
                   2635:     }
1.254     matthew  2636:     if (!$symb) { $symb=&Apache::lonnet::symbread(); }
1.369     www      2637:     $symb=&escape($symb);
1.242     albertel 2638:     if ($target) { $target="target=\"$target\""; }
                   2639:     return '<a href="/adm/parmset?&command=set&'.
                   2640: 	'symb='.$symb.'&uname='.$uname.
                   2641: 	'&udom='.$udom.'" '.$target.'>'.$text.'</a>';
1.116     albertel 2642: }
                   2643: ##############################################
1.37      matthew  2644: 
1.112     bowersj2 2645: =pod
                   2646: 
                   2647: =back
                   2648: 
                   2649: =cut
                   2650: 
1.37      matthew  2651: ###############################################
1.51      www      2652: 
                   2653: 
                   2654: sub timehash {
                   2655:     my @ltime=localtime(shift);
                   2656:     return ( 'seconds' => $ltime[0],
                   2657:              'minutes' => $ltime[1],
                   2658:              'hours'   => $ltime[2],
                   2659:              'day'     => $ltime[3],
                   2660:              'month'   => $ltime[4]+1,
                   2661:              'year'    => $ltime[5]+1900,
                   2662:              'weekday' => $ltime[6],
                   2663:              'dayyear' => $ltime[7]+1,
                   2664:              'dlsav'   => $ltime[8] );
                   2665: }
                   2666: 
1.370     www      2667: sub utc_string {
                   2668:     my ($date)=@_;
1.371     www      2669:     return strftime("%Y%m%dT%H%M%SZ",gmtime($date));
1.370     www      2670: }
                   2671: 
1.51      www      2672: sub maketime {
                   2673:     my %th=@_;
                   2674:     return POSIX::mktime(
                   2675:         ($th{'seconds'},$th{'minutes'},$th{'hours'},
1.210     www      2676:          $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,-1));
1.70      www      2677: }
                   2678: 
                   2679: #########################################
1.51      www      2680: 
                   2681: sub findallcourses {
1.355     albertel 2682:     my ($roles) = @_;
                   2683:     my %roles;
                   2684:     if (ref($roles)) { %roles = map { $_ => 1 } @{$roles}; }
1.348     albertel 2685:     my %courses;
1.51      www      2686:     my $now=time;
1.348     albertel 2687:     foreach my $key (keys(%env)) {
                   2688: 	if ( $key=~m{^user\.role\.(\w+)\./(\w+)/(\w+)} ) {
                   2689: 	    my ($role,$domain,$id) = ($1,$2,$3);
                   2690: 	    next if ($role eq 'ca' || $role eq 'aa');
1.355     albertel 2691: 	    next if (%roles && !exists($roles{$role}));
1.354     albertel 2692: 	    my ($starttime,$endtime)=split(/\./,$env{$key});
1.51      www      2693:             my $active=1;
                   2694:             if ($starttime) {
                   2695: 		if ($now<$starttime) { $active=0; }
                   2696:             }
                   2697:             if ($endtime) {
                   2698:                 if ($now>$endtime) { $active=0; }
                   2699:             }
1.348     albertel 2700:             if ($active) { $courses{$domain.'_'.$id}=1; }
1.51      www      2701:         }
                   2702:     }
1.348     albertel 2703:     return keys(%courses);
1.51      www      2704: }
1.37      matthew  2705: 
1.54      www      2706: ###############################################
1.60      matthew  2707: ###############################################
                   2708: 
                   2709: =pod
                   2710: 
1.112     bowersj2 2711: =head1 Domain Template Functions
                   2712: 
                   2713: =over 4
                   2714: 
                   2715: =item * &determinedomain()
1.60      matthew  2716: 
                   2717: Inputs: $domain (usually will be undef)
                   2718: 
1.63      www      2719: Returns: Determines which domain should be used for designs
1.60      matthew  2720: 
                   2721: =cut
1.54      www      2722: 
1.60      matthew  2723: ###############################################
1.63      www      2724: sub determinedomain {
                   2725:     my $domain=shift;
                   2726:    if (! $domain) {
1.60      matthew  2727:         # Determine domain if we have not been given one
                   2728:         $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1.258     albertel 2729:         if ($env{'user.domain'}) { $domain=$env{'user.domain'}; }
                   2730:         if ($env{'request.role.domain'}) { 
                   2731:             $domain=$env{'request.role.domain'}; 
1.60      matthew  2732:         }
                   2733:     }
1.63      www      2734:     return $domain;
                   2735: }
                   2736: ###############################################
                   2737: =pod
                   2738: 
1.112     bowersj2 2739: =item * &domainlogo()
1.63      www      2740: 
                   2741: Inputs: $domain (usually will be undef)
                   2742: 
                   2743: Returns: A link to a domain logo, if the domain logo exists.
                   2744: If the domain logo does not exist, a description of the domain.
                   2745: 
                   2746: =cut
1.112     bowersj2 2747: 
1.63      www      2748: ###############################################
                   2749: sub domainlogo {
                   2750:     my $domain = &determinedomain(shift);    
                   2751:      # See if there is a logo
1.59      www      2752:     if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1.215     albertel 2753: 	my $logo=&lonhttpdurl("/adm/lonDomLogos/$domain.gif");
                   2754:         return '<img src="'.$logo.'" alt="'.$domain.'" />';
1.60      matthew  2755:     } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
                   2756:         return $Apache::lonnet::domaindescription{$domain};
1.59      www      2757:     } else {
1.60      matthew  2758:         return '';
1.59      www      2759:     }
                   2760: }
1.63      www      2761: ##############################################
                   2762: 
                   2763: =pod
                   2764: 
1.112     bowersj2 2765: =item * &designparm()
1.63      www      2766: 
                   2767: Inputs: $which parameter; $domain (usually will be undef)
                   2768: 
                   2769: Returns: value of designparamter $which
                   2770: 
                   2771: =cut
1.112     bowersj2 2772: 
1.397     albertel 2773: 
1.400     albertel 2774: ##############################################
1.397     albertel 2775: sub designparm {
                   2776:     my ($which,$domain)=@_;
1.258     albertel 2777:     if ($env{'browser.blackwhite'} eq 'on') {
1.110     www      2778: 	if ($which=~/\.(font|alink|vlink|link)$/) {
                   2779: 	    return '#000000';
                   2780: 	}
                   2781: 	if ($which=~/\.(pgbg|sidebg)$/) {
                   2782: 	    return '#FFFFFF';
                   2783: 	}
                   2784: 	if ($which=~/\.tabbg$/) {
                   2785: 	    return '#CCCCCC';
                   2786: 	}
                   2787:     }
1.397     albertel 2788:     if (exists($env{'environment.color.'.$which})) {
1.258     albertel 2789: 	return $env{'environment.color.'.$which};
1.96      www      2790:     }
1.63      www      2791:     $domain=&determinedomain($domain);
1.397     albertel 2792:     if (exists($designhash{$domain.'.'.$which})) {
1.63      www      2793: 	return $designhash{$domain.'.'.$which};
                   2794:     } else {
                   2795:         return $designhash{'default.'.$which};
                   2796:     }
                   2797: }
1.59      www      2798: 
1.60      matthew  2799: ###############################################
                   2800: ###############################################
                   2801: 
                   2802: =pod
                   2803: 
1.112     bowersj2 2804: =back
                   2805: 
                   2806: =head1 HTTP Helpers
                   2807: 
                   2808: =over 4
                   2809: 
                   2810: =item * &bodytag()
1.60      matthew  2811: 
                   2812: Returns a uniform header for LON-CAPA web pages.
                   2813: 
                   2814: Inputs: 
                   2815: 
1.112     bowersj2 2816: =over 4
                   2817: 
                   2818: =item * $title, A title to be displayed on the page.
                   2819: 
                   2820: =item * $function, the current role (can be undef).
                   2821: 
                   2822: =item * $addentries, extra parameters for the <body> tag.
                   2823: 
                   2824: =item * $bodyonly, if defined, only return the <body> tag.
                   2825: 
                   2826: =item * $domain, if defined, force a given domain.
                   2827: 
                   2828: =item * $forcereg, if page should register as content page (relevant for 
1.86      www      2829:             text interface only)
1.60      matthew  2830: 
1.326     albertel 2831: =item * $customtitle, alternate text to use instead of $title
                   2832:                       in the title box that appears, this text
                   2833:                       is not auto translated like the $title is
1.309     albertel 2834: 
                   2835: =item * $notopbar, if true, keep the 'what is this' info but remove the
                   2836:                    navigational links
1.317     albertel 2837: 
1.338     albertel 2838: =item * $bgcolor, used to override the bgcolor on a webpage to a specific value
                   2839: 
                   2840: =item * $notitle, if true keep the nav controls, but remove the title bar
                   2841: 
1.361     albertel 2842: =item * $no_inline_link, if true and in remote mode, don't show the 
                   2843:          'Switch To Inline Menu' link
                   2844: 
1.112     bowersj2 2845: =back
                   2846: 
1.60      matthew  2847: Returns: A uniform header for LON-CAPA web pages.  
                   2848: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
                   2849: If $bodyonly is undef or zero, an html string containing a <body> tag and 
                   2850: other decorations will be returned.
                   2851: 
                   2852: =cut
                   2853: 
1.54      www      2854: sub bodytag {
1.309     albertel 2855:     my ($title,$function,$addentries,$bodyonly,$domain,$forcereg,$customtitle,
1.361     albertel 2856: 	$notopbar,$bgcolor,$notitle,$no_inline_link)=@_;
1.339     albertel 2857: 
1.117     www      2858:     $title=&mt($title);
1.339     albertel 2859: 
1.183     matthew  2860:     $function = &get_users_function() if (!$function);
1.339     albertel 2861:     my $img =    &designparm($function.'.img',$domain);
                   2862:     my $font =   &designparm($function.'.font',$domain);
                   2863:     my $pgbg   = $bgcolor || &designparm($function.'.pgbg',$domain);
                   2864: 
                   2865:     my %design = ( 'style'   => 'margin-top: 0px',
                   2866: 		   'bgcolor' => $pgbg,
                   2867: 		   'text'    => $font,
                   2868:                    'alink'   => &designparm($function.'.alink',$domain),
                   2869: 		   'vlink'   => &designparm($function.'.vlink',$domain),
                   2870: 		   'link'    => &designparm($function.'.link',$domain),);
                   2871:     @$addentries{keys(%design)} = @design{keys(%design)};
                   2872: 
1.63      www      2873:  # role and realm
1.378     raeburn  2874:     my ($role,$realm) = split(/\./,$env{'request.role'},2);
                   2875:     if ($role  eq 'ca') {
                   2876:         my ($rdom,$rname) = ($realm =~ m-^/(\w+)/(\w+)$-);
                   2877:         $realm = &plainname($rname,$rdom).':'.$rdom;
                   2878:     } 
1.55      www      2879: # realm
1.258     albertel 2880:     if ($env{'request.course.id'}) {
1.378     raeburn  2881:         if ($env{'request.role'} !~ /^cr/) {
                   2882:             $role = &Apache::lonnet::plaintext($role,&course_type());
                   2883:         }
1.359     albertel 2884: 	$realm = $env{'course.'.$env{'request.course.id'}.'.description'};
1.378     raeburn  2885:     } else {
                   2886:         $role = &Apache::lonnet::plaintext($role);
1.54      www      2887:     }
1.359     albertel 2888:     if (!$realm) { $realm='&nbsp;'; }
1.55      www      2889: # Set messages
1.60      matthew  2890:     my $messages=&domainlogo($domain);
1.101     www      2891: # Port for miniserver
1.83      albertel 2892:     my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
                   2893:     if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1.330     albertel 2894: 
                   2895:     my $extra_body_attr = &make_attr_string($forcereg,$addentries);
1.329     albertel 2896: 
1.101     www      2897: # construct main body tag
1.359     albertel 2898:     my $bodytag = "<body $extra_body_attr>".
                   2899: 	&Apache::lontexconvert::init_math_support();
1.252     albertel 2900: 
1.332     albertel 2901:     if ($bodyonly 
                   2902: 	|| ($env{'request.state'} eq 'construct' 
                   2903: 	    && $env{'environment.remote'} ne 'off' )) {
1.60      matthew  2904:         return $bodytag;
1.258     albertel 2905:     } elsif ($env{'browser.interface'} eq 'textual') {
1.95      www      2906: # Accessibility
1.224     raeburn  2907:           
1.337     albertel 2908: 	$bodytag.=&Apache::lonmenu::menubuttons($forcereg,$forcereg);
1.338     albertel 2909: 	if (!$notitle) {
1.337     albertel 2910: 	    $bodytag.='<h1>LON-CAPA: '.$title.'</h1>';
                   2911: 	}
                   2912: 	return $bodytag;
1.359     albertel 2913:     }
                   2914: 
1.410     albertel 2915:     my $name = &plainname($env{'user.name'},$env{'user.domain'});
1.359     albertel 2916:     
                   2917:     my $roleinfo=(<<ENDROLE);
                   2918: <td class="LC_title_bar_who">
                   2919: <div class="LC_title_bar_name">
1.410     albertel 2920:     $name
1.361     albertel 2921:     &nbsp;
1.359     albertel 2922: </div>
                   2923: <div class="LC_title_bar_role">
1.361     albertel 2924: $role&nbsp;
1.359     albertel 2925: </div>
                   2926: <div class="LC_title_bar_realm">
1.361     albertel 2927: $realm&nbsp;
1.359     albertel 2928: </div>
1.206     albertel 2929: </td>
                   2930: ENDROLE
1.235     raeburn  2931: 
1.359     albertel 2932:     my $titleinfo = '<span class="LC_title_bar_title">'.$title.'</span>';
                   2933:     if ($customtitle) {
                   2934:         $titleinfo = $customtitle;
                   2935:     }
                   2936:     #
                   2937:     # Extra info if you are the DC
                   2938:     my $dc_info = '';
                   2939:     if ($env{'user.adv'} && exists($env{'user.role.dc./'.
                   2940:                         $env{'course.'.$env{'request.course.id'}.
                   2941:                                  '.domain'}.'/'})) {
                   2942:         my $cid = $env{'request.course.id'};
                   2943:         $dc_info.= $cid.' '.$env{'course.'.$cid.'.internal.coursecode'};
1.380     www      2944:         $dc_info =~ s/\s+$//;
1.359     albertel 2945:         $dc_info = '('.$dc_info.')';
                   2946:     }
                   2947: 
                   2948:     if ($env{'environment.remote'} eq 'off') {
                   2949:         # No Remote
1.258     albertel 2950: 	if ($env{'request.state'} eq 'construct') {
1.359     albertel 2951: 	    $forcereg=1;
                   2952: 	}
                   2953: 
                   2954: 	if (!$customtitle && $env{'request.state'} eq 'construct') {
                   2955: 	    # this is for resources; directories have customtitle, and crumbs
                   2956:             # and select recent are created in lonpubdir.pm  
1.229     albertel 2957: 	    my ($uname,$thisdisfn)=
1.258     albertel 2958: 		($env{'request.filename'} =~ m|^/home/([^/]+)/public_html/(.*)|);
1.229     albertel 2959: 	    my $formaction='/priv/'.$uname.'/'.$thisdisfn;
                   2960: 	    $formaction=~s/\/+/\//g;
                   2961: 
1.359     albertel 2962: 	    my $parentpath = '';
                   2963: 	    my $lastitem = '';
                   2964: 	    if ($thisdisfn =~ m-(.+/)([^/]*)$-) {
                   2965: 		$parentpath = $1;
                   2966: 		$lastitem = $2;
                   2967: 	    } else {
                   2968: 		$lastitem = $thisdisfn;
                   2969: 	    }
                   2970: 	    $titleinfo = 
1.401     albertel 2971: 		&Apache::loncommon::help_open_menu('','',3,'Authoring').
1.359     albertel 2972: 		'<b>Construction Space</b>:&nbsp;'. 
                   2973: 		'<form name="dirs" method="post" action="'.$formaction
                   2974: 		.'" target="_top"><tt><b>'
                   2975: 		.&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv','','+1',1)."<font size=\"+1\">$lastitem</font></b></tt><br />"
                   2976: 		.&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
                   2977: 		.'</form>'
                   2978: 		.&Apache::lonmenu::constspaceform();
1.235     raeburn  2979:         }
1.359     albertel 2980: 
1.337     albertel 2981:         my $titletable;
1.338     albertel 2982: 	if (!$notitle) {
1.337     albertel 2983: 	    $titletable =
1.359     albertel 2984: 		'<table id="LC_title_bar">'.
                   2985:                          "<tr><td> $titleinfo $dc_info</td>".$roleinfo.
                   2986: 			 '</tr></table>';
1.337     albertel 2987: 	}
1.359     albertel 2988: 	if ($notopbar) {
                   2989: 	    $bodytag .= $titletable;
                   2990: 	} else {
                   2991: 	    if ($env{'request.state'} eq 'construct') {
1.337     albertel 2992:                 $bodytag .= &Apache::lonmenu::menubuttons($forcereg,$forcereg,
                   2993: 							  $titletable);
1.272     raeburn  2994:             } else {
1.336     albertel 2995:                 $bodytag .= &Apache::lonmenu::menubuttons($forcereg,$forcereg).
1.359     albertel 2996: 		    $titletable;
1.272     raeburn  2997:             }
1.235     raeburn  2998:         }
                   2999:         return $bodytag;
1.94      www      3000:     }
1.95      www      3001: 
1.93      www      3002: #
1.95      www      3003: # Top frame rendering, Remote is up
1.93      www      3004: #
1.359     albertel 3005: 
                   3006:     my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
                   3007:         $lonhttpdPort.$img.'" alt="'.$function.'" />';
                   3008: 
1.305     www      3009:     # Explicit link to get inline menu
1.361     albertel 3010:     my $menu= ($no_inline_link?''
                   3011: 	       :'<br /><a href="/adm/remote?action=collapse">'.&mt('Switch to Inline Menu Mode').'</a>');
1.245     matthew  3012:     #
1.338     albertel 3013:     if ($notitle) {
1.337     albertel 3014: 	return $bodytag;
                   3015:     }
1.94      www      3016:     return(<<ENDBODY);
1.60      matthew  3017: $bodytag
1.359     albertel 3018: <table id="LC_title_bar" class="LC_with_remote">
1.368     albertel 3019: <tr><td class="LC_title_bar_role_logo">$upperleft</td>
1.359     albertel 3020:     <td class="LC_title_bar_domain_logo">$messages&nbsp;</td>
1.54      www      3021: </tr>
1.359     albertel 3022: <tr><td>$titleinfo $dc_info $menu</td>
                   3023: $roleinfo
1.368     albertel 3024: </tr>
1.356     albertel 3025: </table>
1.54      www      3026: ENDBODY
1.182     matthew  3027: }
                   3028: 
1.330     albertel 3029: sub make_attr_string {
                   3030:     my ($register,$attr_ref) = @_;
                   3031: 
                   3032:     if ($attr_ref && !ref($attr_ref)) {
                   3033: 	die("addentries Must be a hash ref ".
                   3034: 	    join(':',caller(1))." ".
                   3035: 	    join(':',caller(0))." ");
                   3036:     }
                   3037: 
                   3038:     if ($register) {
1.339     albertel 3039: 	my ($on_load,$on_unload);
                   3040: 	foreach my $key (keys(%{$attr_ref})) {
                   3041: 	    if      (lc($key) eq 'onload') {
                   3042: 		$on_load.=$attr_ref->{$key}.';';
                   3043: 		delete($attr_ref->{$key});
                   3044: 
                   3045: 	    } elsif (lc($key) eq 'onunload') {
                   3046: 		$on_unload.=$attr_ref->{$key}.';';
                   3047: 		delete($attr_ref->{$key});
                   3048: 	    }
                   3049: 	}
                   3050: 	$attr_ref->{'onload'}  =
                   3051: 	    &Apache::lonmenu::loadevents().  $on_load;
                   3052: 	$attr_ref->{'onunload'}=
                   3053: 	    &Apache::lonmenu::unloadevents().$on_unload;
                   3054:     }
                   3055: 
                   3056: # Accessibility font enhance
                   3057:     if ($env{'browser.fontenhance'} eq 'on') {
                   3058: 	my $style;
                   3059: 	foreach my $key (keys(%{$attr_ref})) {
                   3060: 	    if (lc($key) eq 'style') {
                   3061: 		$style.=$attr_ref->{$key}.';';
                   3062: 		delete($attr_ref->{$key});
                   3063: 	    }
                   3064: 	}
                   3065: 	$attr_ref->{'style'}=$style.'; font-size: x-large;';
1.330     albertel 3066:     }
1.339     albertel 3067: 
                   3068:     if ($env{'browser.blackwhite'} eq 'on') {
                   3069: 	delete($attr_ref->{'font'});
                   3070: 	delete($attr_ref->{'link'});
                   3071: 	delete($attr_ref->{'alink'});
                   3072: 	delete($attr_ref->{'vlink'});
                   3073: 	delete($attr_ref->{'bgcolor'});
                   3074: 	delete($attr_ref->{'background'});
                   3075:     }
                   3076: 
1.330     albertel 3077:     my $attr_string;
                   3078:     foreach my $attr (keys(%$attr_ref)) {
                   3079: 	$attr_string .= " $attr=\"".$attr_ref->{$attr}.'" ';
                   3080:     }
                   3081:     return $attr_string;
                   3082: }
                   3083: 
                   3084: 
1.182     matthew  3085: ###############################################
1.251     albertel 3086: ###############################################
                   3087: 
                   3088: =pod
                   3089: 
                   3090: =back
                   3091: 
1.306     albertel 3092: =head1 HTML Helpers
1.251     albertel 3093: 
                   3094: =over 4
                   3095: 
                   3096: =item * &endbodytag()
                   3097: 
                   3098: Returns a uniform footer for LON-CAPA web pages.
                   3099: 
1.306     albertel 3100: Inputs: none
1.251     albertel 3101: 
                   3102: =back
                   3103: 
                   3104: =cut
                   3105: 
                   3106: sub endbodytag {
                   3107:     my $endbodytag='</body>';
1.269     albertel 3108:     $endbodytag=&Apache::lontexconvert::jsMath_process()."\n".$endbodytag;
1.315     albertel 3109:     if ( exists( $env{'internal.head.redirect'} ) ) {
                   3110: 	$endbodytag=
                   3111: 	    "<br /><a href=\"$env{'internal.head.redirect'}\">".
                   3112: 	    &mt('Continue').'</a>'.
                   3113: 	    $endbodytag;
                   3114:     }
1.251     albertel 3115:     return $endbodytag;
                   3116: }
                   3117: 
1.352     albertel 3118: =pod
                   3119: 
                   3120: =over 4
                   3121: 
                   3122: =item * &standard_css()
                   3123: 
                   3124: Returns a style sheet
                   3125: 
                   3126: Inputs: (all optional)
                   3127:             domain         -> force to color decorate a page for a specific
                   3128:                                domain
                   3129:             function       -> force usage of a specific rolish color scheme
                   3130:             bgcolor        -> override the default page bgcolor
                   3131: 
                   3132: =back
                   3133: 
                   3134: =cut
                   3135: 
1.343     albertel 3136: sub standard_css {
1.345     albertel 3137:     my ($function,$domain,$bgcolor) = @_;
1.352     albertel 3138:     $function  = &get_users_function() if (!$function);
                   3139:     my $img    = &designparm($function.'.img',   $domain);
                   3140:     my $tabbg  = &designparm($function.'.tabbg', $domain);
                   3141:     my $font   = &designparm($function.'.font',  $domain);
1.345     albertel 3142:     my $sidebg = &designparm($function.'.sidebg',$domain);
1.382     albertel 3143:     my $pgbg_or_bgcolor =
                   3144: 	         $bgcolor ||
1.352     albertel 3145: 	         &designparm($function.'.pgbg',  $domain);
1.382     albertel 3146:     my $pgbg   = &designparm($function.'.pgbg',  $domain);
1.352     albertel 3147:     my $alink  = &designparm($function.'.alink', $domain);
                   3148:     my $vlink  = &designparm($function.'.vlink', $domain);
                   3149:     my $link   = &designparm($function.'.link',  $domain);
                   3150: 
                   3151:     my $sans                 = 'Arial,Helvetica,sans-serif';
1.395     albertel 3152:     my $mono                 = 'monospace';
1.352     albertel 3153:     my $data_table_head      = $tabbg;
                   3154:     my $data_table_light     = '#EEEEEE';
                   3155:     my $data_table_dark      = '#DDD';
1.424     albertel 3156:     my $data_table_darker    = '#CCC';
1.349     albertel 3157:     my $data_table_highlight = '#FFFF00';
1.352     albertel 3158:     my $mail_new             = '#FFBB77';
                   3159:     my $mail_new_hover       = '#DD9955';
                   3160:     my $mail_read            = '#BBBB77';
                   3161:     my $mail_read_hover      = '#999944';
                   3162:     my $mail_replied         = '#AAAA88';
                   3163:     my $mail_replied_hover   = '#888855';
                   3164:     my $mail_other           = '#99BBBB';
                   3165:     my $mail_other_hover     = '#669999';
1.391     albertel 3166:     my $table_header         = '#DDDDDD';
1.392     albertel 3167: 
                   3168:     my $border = ($env{'browser.type'} eq 'explorer') ? '0px 2px 0px 2px'
                   3169: 	                                              : '0px 3px 0px 4px';
1.343     albertel 3170:     return <<END;
1.345     albertel 3171: h1, h2, h3, th { font-family: $sans }
1.343     albertel 3172: a:focus { color: red; background: yellow } 
                   3173: table.thinborder { border-collapse: collapse; }
1.426     albertel 3174: table.thinborder tr th {  border-style: solid; border-width: 1px; background: $tabbg;}
                   3175: table.thinborder tr td { border-style: solid; border-width: 1px}
                   3176: 
1.343     albertel 3177: form, .inline { display: inline; }
                   3178: .center { text-align: center; }
1.395     albertel 3179: .LC_filename {font-family: $mono;}
1.350     albertel 3180: .LC_error {
                   3181:   color: red;
                   3182:   font-size: larger;
                   3183: }
1.394     albertel 3184: .LC_warning {
                   3185:   color: red;
                   3186: }
1.350     albertel 3187: .LC_success {
                   3188:   color: green;
                   3189: }
1.346     albertel 3190: 
1.392     albertel 3191: table#LC_top_nav, table#LC_menubuttons {
1.345     albertel 3192:   width: 100%;
                   3193:   background: $pgbg;
1.392     albertel 3194:   border: 2px;
1.402     albertel 3195:   border-collapse: separate;
1.403     albertel 3196:   padding: 0px;
1.345     albertel 3197: }
1.392     albertel 3198: 
1.409     albertel 3199: table#LC_title_bar, table.LC_breadcrumbs, table#LC_nav_location,
1.393     albertel 3200: table#LC_title_bar.LC_with_remote {
1.359     albertel 3201:   width: 100%;
1.392     albertel 3202:   border-color: $pgbg;
                   3203:   border-style: solid;
                   3204:   border-width: $border;
                   3205: 
1.379     albertel 3206:   background: $pgbg;
                   3207:   font-family: $sans;
1.392     albertel 3208:   border-collapse: collapse;
1.403     albertel 3209:   padding: 0px;
1.359     albertel 3210: }
1.392     albertel 3211: 
1.409     albertel 3212: table.LC_docs_path {
                   3213:   width: 100%;
                   3214:   border: 0;
                   3215:   background: $pgbg;
                   3216:   font-family: $sans;
                   3217:   border-collapse: collapse;
                   3218:   padding: 0px;
                   3219: }
                   3220: 
1.359     albertel 3221: table#LC_title_bar td {
                   3222:   background: $tabbg;
                   3223: }
                   3224: table#LC_title_bar td.LC_title_bar_who {
                   3225:   background: $tabbg;
                   3226:   color: $font;
1.427     albertel 3227:   font: small $sans;
1.359     albertel 3228:   text-align: right;
                   3229: }
                   3230: span.LC_title_bar_title {
1.416     albertel 3231:   font: bold x-large $sans;
1.359     albertel 3232: }
                   3233: table#LC_title_bar td.LC_title_bar_domain_logo {
                   3234:   background: $sidebg;
                   3235:   text-align: right;
1.368     albertel 3236:   padding: 0px;
                   3237: }
                   3238: table#LC_title_bar td.LC_title_bar_role_logo {
                   3239:   background: $sidebg;
                   3240:   padding: 0px;
1.359     albertel 3241: }
                   3242: 
1.346     albertel 3243: table#LC_menubuttons_mainmenu {
                   3244:   background: $pgbg;
                   3245:   border: 0px;
                   3246:   border-spacing: 1px;
1.372     albertel 3247:   padding: 0px 1px;
1.346     albertel 3248:   margin: 0px;
                   3249:   border-collapse: separate;
                   3250: }
                   3251: table#LC_menubuttons img, table#LC_menubuttons_mainmenu img {
                   3252:   border: 0px;
                   3253: }
1.345     albertel 3254: table#LC_top_nav td {
                   3255:   background: $tabbg;
1.392     albertel 3256:   border: 0px;
1.407     albertel 3257:   font-size: small;
1.345     albertel 3258: }
                   3259: table#LC_top_nav td a, div#LC_top_nav a {
                   3260:   color: $font;
                   3261:   font-family: $sans;
                   3262: }
1.364     albertel 3263: table#LC_top_nav td.LC_top_nav_logo {
                   3264:   background: $tabbg;
                   3265:   text-align: right;
1.408     albertel 3266:   white-space: nowrap;
                   3267:   font-weight: bold;
                   3268: }
                   3269: table#LC_top_nav td.LC_top_nav_logo img {
                   3270:   margin-left: 0.2em;
                   3271:   vertical-align: bottom;
1.364     albertel 3272: }
1.409     albertel 3273: table.LC_breadcrumbs td, table.LC_docs_path td  {
1.357     albertel 3274:   background: $tabbg;
                   3275:   color: $font;
                   3276:   font-family: $sans;
1.358     albertel 3277:   font-size: smaller;
1.357     albertel 3278: }
1.411     albertel 3279: table.LC_breadcrumbs td.LC_breadcrumbs_component,
1.409     albertel 3280: table.LC_docs_path td.LC_docs_path_component {
1.357     albertel 3281:   background: $tabbg;
                   3282:   color: $font;
                   3283:   font-family: $sans;
                   3284:   font-size: larger;
                   3285:   text-align: right;
                   3286: }
1.383     albertel 3287: td.LC_table_cell_checkbox {
                   3288:   text-align: center;
                   3289: }
                   3290: 
1.346     albertel 3291: .LC_menubuttons_inline_text {
                   3292:   color: $font;
                   3293:   font-family: $sans;
                   3294:   font-size: smaller;
                   3295: }
                   3296: 
                   3297: td.LC_menubuttons_text {
                   3298:   color: $font;
                   3299:   font-family: $sans;
                   3300: }
                   3301: td.LC_menubuttons_img {
                   3302:   background: $tabbg;
                   3303: }
                   3304: .LC_current_location {
                   3305:   font-family: $sans;
                   3306:   background: $tabbg;
                   3307: }
                   3308: .LC_new_mail {
                   3309:   font-family: $sans;
                   3310:   font-weight: bold;
                   3311: }
1.347     albertel 3312: 
1.349     albertel 3313: table.LC_data_table, table.LC_mail_list {
1.347     albertel 3314:   border: 1px solid #000000;
1.402     albertel 3315:   border-collapse: separate;
1.426     albertel 3316:   border-spacing: 1px;
1.347     albertel 3317: }
1.422     albertel 3318: .LC_data_table_dense {
                   3319:   font-size: small;
                   3320: }
1.349     albertel 3321: table.LC_data_table tr th, table.LC_calendar tr th, table.LC_mail_list tr th {
                   3322:   font-weight: bold;
                   3323:   background-color: $data_table_head;
1.421     albertel 3324:   font-size: smaller;
1.347     albertel 3325: }
                   3326: table.LC_data_table tr td {
1.349     albertel 3327:   background-color: $data_table_light;
1.425     albertel 3328:   padding: 2px;
1.347     albertel 3329: }
                   3330: table.LC_data_table tr.LC_even_row td {
1.349     albertel 3331:   background-color: $data_table_dark;
1.347     albertel 3332: }
1.425     albertel 3333: table.LC_data_table tr.LC_data_table_highlight td {
                   3334:   background-color: $data_table_darker;
                   3335: }
1.421     albertel 3336: table.LC_data_table tr.LC_empty_row td {
1.347     albertel 3337:   background-color: #FFFFFF;
1.421     albertel 3338:   font-weight: bold;
                   3339:   font-style: italic;
                   3340:   text-align: center;
                   3341:   padding: 8px;
1.347     albertel 3342: }
                   3343: 
1.349     albertel 3344: table.LC_calendar {
                   3345:   border: 1px solid #000000;
                   3346:   border-collapse: collapse;
                   3347: }
                   3348: table.LC_calendar_pickdate {
                   3349:   font-size: xx-small;
                   3350: }
                   3351: table.LC_calendar tr td {
                   3352:   border: 1px solid #000000;
                   3353:   vertical-align: top;
                   3354: }
                   3355: table.LC_calendar tr td.LC_calendar_day_empty {
                   3356:   background-color: $data_table_dark;
                   3357: }
                   3358: table.LC_calendar tr td.LC_calendar_day_current {
                   3359:   background-color: $data_table_highlight;
                   3360: }
                   3361: 
                   3362: table.LC_mail_list tr.LC_mail_new {
                   3363:   background-color: $mail_new;
                   3364: }
                   3365: table.LC_mail_list tr.LC_mail_new:hover {
                   3366:   background-color: $mail_new_hover;
                   3367: }
                   3368: table.LC_mail_list tr.LC_mail_read {
                   3369:   background-color: $mail_read;
                   3370: }
                   3371: table.LC_mail_list tr.LC_mail_read:hover {
                   3372:   background-color: $mail_read_hover;
                   3373: }
                   3374: table.LC_mail_list tr.LC_mail_replied {
                   3375:   background-color: $mail_replied;
                   3376: }
                   3377: table.LC_mail_list tr.LC_mail_replied:hover {
                   3378:   background-color: $mail_replied_hover;
                   3379: }
                   3380: table.LC_mail_list tr.LC_mail_other {
                   3381:   background-color: $mail_other;
                   3382: }
                   3383: table.LC_mail_list tr.LC_mail_other:hover {
                   3384:   background-color: $mail_other_hover;
                   3385: }
1.385     albertel 3386: 
1.386     albertel 3387: table#LC_portfolio_actions {
                   3388:   width: auto;
                   3389:   background: $pgbg;
                   3390:   border: 0px;
                   3391:   border-spacing: 2px 2px;
                   3392:   padding: 0px;
                   3393:   margin: 0px;
                   3394:   border-collapse: separate;
                   3395: }
                   3396: table#LC_portfolio_actions td.LC_label {
                   3397:   background: $tabbg;
                   3398:   text-align: right;
                   3399: }
                   3400: table#LC_portfolio_actions td.LC_value {
                   3401:   background: $tabbg;
                   3402: }
1.385     albertel 3403: 
1.391     albertel 3404: table#LC_cstr_controls {
                   3405:   width: 100%;
                   3406:   border-collapse: collapse;
                   3407: }
                   3408: table#LC_cstr_controls tr td {
                   3409:   border: 4px solid $pgbg;
                   3410:   padding: 4px;
                   3411:   text-align: center;
                   3412:   background: $tabbg;
                   3413: }
                   3414: table#LC_cstr_controls tr th {
                   3415:   border: 4px solid $pgbg;
                   3416:   background: $table_header;
                   3417:   text-align: center;
                   3418:   font-family: $sans;
                   3419:   font-size: smaller;
                   3420: }
                   3421: 
1.389     albertel 3422: table#LC_browser {
                   3423:  
                   3424: }
                   3425: table#LC_browser tr th {
1.391     albertel 3426:   background: $table_header;
1.389     albertel 3427: }
1.390     albertel 3428: table#LC_browser tr td {
                   3429:   padding: 2px;
                   3430: }
1.389     albertel 3431: table#LC_browser tr.LC_browser_file,
                   3432: table#LC_browser tr.LC_browser_file_published {
                   3433:   background: #CCFF88;
                   3434: }
                   3435: table#LC_browser tr.LC_browser_file_locked,
                   3436: table#LC_browser tr.LC_browser_file_unpublished {
                   3437:   background: #FFAA99;
1.387     albertel 3438: }
1.389     albertel 3439: table#LC_browser tr.LC_browser_file_obsolete {
                   3440:   background: #AAAAAA;
1.387     albertel 3441: }
1.389     albertel 3442: table#LC_browser tr.LC_browser_file_modified {
                   3443:   background: #FFFF77;
1.387     albertel 3444: }
1.389     albertel 3445: table#LC_browser tr.LC_browser_folder {
                   3446:   background: #CCCCFF;
1.387     albertel 3447: }
1.388     albertel 3448: span.LC_current_location {
                   3449:   font-size: x-large;
                   3450:   background: $pgbg;
                   3451: }
1.387     albertel 3452: 
1.395     albertel 3453: span.LC_parm_menu_item {
                   3454:   font-size: larger;
                   3455:   font-family: $sans;
                   3456: }
                   3457: span.LC_parm_scope_all {
                   3458:   color: red;
                   3459: }
                   3460: span.LC_parm_scope_folder {
                   3461:   color: green;
                   3462: }
                   3463: span.LC_parm_scope_resource {
                   3464:   color: orange;
                   3465: }
                   3466: span.LC_parm_part {
                   3467:   color: blue;
                   3468: }
                   3469: span.LC_parm_folder, span.LC_parm_symb {
                   3470:   font-size: x-small;
                   3471:   font-family: $mono;
                   3472:   color: #AAAAAA;
                   3473: }
                   3474: 
1.396     albertel 3475: td.LC_parm_overview_level_menu, td.LC_parm_overview_map_menu,
                   3476: td.LC_parm_overview_parm_selectors, td.LC_parm_overview_parm_restrictions {
                   3477:   border: 1px solid black;
                   3478:   border-collapse: collapse;
                   3479: }
                   3480: table.LC_parm_overview_restrictions td {
                   3481:   border-width: 1px 4px 1px 4px;
                   3482:   border-style: solid;
                   3483:   border-color: $pgbg;
                   3484:   text-align: center;
                   3485: }
                   3486: table.LC_parm_overview_restrictions th {
                   3487:   background: $tabbg;
                   3488:   border-width: 1px 4px 1px 4px;
                   3489:   border-style: solid;
                   3490:   border-color: $pgbg;
                   3491: }
1.398     albertel 3492: table#LC_helpmenu {
                   3493:   border: 0px;
                   3494:   height: 55px;
                   3495:   border-spacing: 0px;
                   3496: }
                   3497: 
                   3498: table#LC_helpmenu fieldset legend {
                   3499:   font-size: larger;
                   3500:   font-weight: bold;
                   3501: }
1.397     albertel 3502: table#LC_helpmenu_links {
                   3503:   width: 100%;
                   3504:   border: 1px solid black;
                   3505:   background: $pgbg;
                   3506:   padding: 0px;
                   3507:   border-spacing: 1px;
                   3508: }
                   3509: table#LC_helpmenu_links tr td {
                   3510:   padding: 1px;
                   3511:   background: $tabbg;
1.399     albertel 3512:   text-align: center;
                   3513:   font-weight: bold;
1.397     albertel 3514: }
1.396     albertel 3515: 
1.397     albertel 3516: table#LC_helpmenu_links a:link, table#LC_helpmenu_links a:visited,
                   3517: table#LC_helpmenu_links a:active {
                   3518:   text-decoration: none;
                   3519:   color: $font;
                   3520: }
                   3521: table#LC_helpmenu_links a:hover {
                   3522:   text-decoration: underline;
                   3523:   color: $vlink;
                   3524: }
1.396     albertel 3525: 
1.417     albertel 3526: .LC_chrt_popup_exists {
                   3527:   border: 1px solid #339933;
                   3528:   margin: -1px;
                   3529: }
                   3530: .LC_chrt_popup_up {
                   3531:   border: 1px solid yellow;
                   3532:   margin: -1px;
                   3533: }
                   3534: .LC_chrt_popup {
                   3535:   border: 1px solid #8888FF;
                   3536:   background: #CCCCFF;
                   3537: }
                   3538: 
1.421     albertel 3539: table.LC_pick_box {
                   3540:   width: 100%;
                   3541:   border-collapse: separate;
                   3542:   background: white;
                   3543:   border: 1px solid black;
                   3544:   border-spacing: 1px;
                   3545: }
                   3546: table.LC_pick_box td.LC_pick_box_title {
                   3547:   background: $tabbg;
                   3548:   font-weight: bold;
                   3549:   text-align: right;
                   3550:   width: 184px;
                   3551:   padding: 8px;
                   3552: }
1.424     albertel 3553: table.LC_pick_box td.LC_pick_box_separator {
1.421     albertel 3554:   padding: 0px;
                   3555:   height: 1px;
                   3556:   background: black;
                   3557: }
                   3558: table.LC_pick_box td.LC_pick_box_submit {
                   3559:   text-align: right;
                   3560: }
                   3561: 
1.424     albertel 3562: table.LC_group_priv_box {
                   3563:   background: white;
                   3564:   border: 1px solid black;
                   3565:   border-spacing: 1px;
                   3566: }
                   3567: table.LC_group_priv_box td.LC_pick_box_title {
                   3568:   background: $tabbg;
                   3569:   font-weight: bold;
                   3570:   text-align: right;
                   3571:   width: 184px;
                   3572: }
                   3573: table.LC_group_priv_box td.LC_groups_fixed {
                   3574:   background: $data_table_light;
                   3575:   text-align: center;
                   3576: }
                   3577: table.LC_group_priv_box td.LC_groups_optional {
                   3578:   background: $data_table_dark;
                   3579:   text-align: center;
                   3580: }
                   3581: table.LC_group_priv_box td.LC_groups_functionality {
                   3582:   background: $data_table_darker;
                   3583:   text-align: center;
                   3584:   font-weight: bold;
                   3585: }
                   3586: table.LC_group_priv td {
                   3587:   text-align: left;
                   3588:   padding: 0px;
                   3589: }
                   3590: 
1.421     albertel 3591: table.LC_notify_front_page {
                   3592:   background: white;
                   3593:   border: 1px solid black;
                   3594:   padding: 8px;
                   3595: }
                   3596: table.LC_notify_front_page td {
                   3597:   padding: 8px;
                   3598: }
1.424     albertel 3599: .LC_navbuttons {
                   3600:   margin: 2ex 0ex 2ex 0ex;
                   3601: }
1.423     albertel 3602: .LC_topic_bar {
                   3603:   font-family: $sans;
                   3604:   font-weight: bold;
                   3605:   width: 100%;
                   3606:   background: $tabbg;
                   3607:   vertical-align: middle;
                   3608:   margin: 2ex 0ex 2ex 0ex;
                   3609: }
                   3610: .LC_topic_bar span {
                   3611:   vertical-align: middle;
                   3612: }
                   3613: .LC_topic_bar img {
                   3614:   vertical-align: bottom;
                   3615: }
                   3616: table.LC_course_group_status {
                   3617:   margin: 20px;
                   3618: }
                   3619: table.LC_status_selector td {
                   3620:   vertical-align: top;
                   3621:   text-align: center;
1.424     albertel 3622:   padding: 4px;
                   3623: }
                   3624: table.LC_descriptive_input td.LC_description {
                   3625:   vertical-align: top;
                   3626:   text-align: right;
                   3627:   font-weight: bold;
1.423     albertel 3628: }
1.421     albertel 3629: 
1.343     albertel 3630: END
                   3631: }
                   3632: 
1.306     albertel 3633: =pod
                   3634: 
                   3635: =over 4
                   3636: 
                   3637: =item * &headtag()
                   3638: 
                   3639: Returns a uniform footer for LON-CAPA web pages.
                   3640: 
1.307     albertel 3641: Inputs: $title - optional title for the head
                   3642:         $head_extra - optional extra HTML to put inside the <head>
1.315     albertel 3643:         $args - optional arguments
1.319     albertel 3644:             force_register - if is true call registerurl so the remote is 
                   3645:                              informed
1.415     albertel 3646:             redirect       -> array ref of
                   3647:                                    1- seconds before redirect occurs
                   3648:                                    2- url to redirect to
                   3649:                                    3- whether the side effect should occur
1.315     albertel 3650:                            (side effect of setting 
                   3651:                                $env{'internal.head.redirect'} to the url 
                   3652:                                redirected too)
1.352     albertel 3653:             domain         -> force to color decorate a page for a specific
                   3654:                                domain
                   3655:             function       -> force usage of a specific rolish color scheme
                   3656:             bgcolor        -> override the default page bgcolor
                   3657: 
1.306     albertel 3658: =back
                   3659: 
                   3660: =cut
                   3661: 
                   3662: sub headtag {
1.313     albertel 3663:     my ($title,$head_extra,$args) = @_;
1.306     albertel 3664:     
1.363     albertel 3665:     my $function = $args->{'function'} || &get_users_function();
                   3666:     my $domain   = $args->{'domain'}   || &determinedomain();
                   3667:     my $bgcolor  = $args->{'bgcolor'}  || &designparm($function.'.pgbg',$domain);
1.418     albertel 3668:     my $url = join(':',$env{'user.name'},$env{'user.domain'},
                   3669: 		   #time(),
                   3670: 		   $env{'environment.color.timestamp'},
1.363     albertel 3671: 		   $function,$domain,$bgcolor);
                   3672: 
1.369     www      3673:     $url = '/adm/css/'.&escape($url).'.css';
1.363     albertel 3674: 
1.308     albertel 3675:     my $result =
                   3676: 	'<head>'.
1.340     albertel 3677: 	&font_settings().
1.308     albertel 3678: 	&Apache::lonhtmlcommon::htmlareaheaders();
1.319     albertel 3679: 
                   3680:     if ($args->{'force_register'}) {
                   3681: 	$result .= &Apache::lonmenu::registerurl(1);
                   3682:     }
                   3683: 
1.314     albertel 3684:     if (ref($args->{'redirect'})) {
1.414     albertel 3685: 	my ($time,$url,$inhibit_continue) = @{$args->{'redirect'}};
1.315     albertel 3686: 	$url = &Apache::lonenc::check_encrypt($url);
1.414     albertel 3687: 	if (!$inhibit_continue) {
                   3688: 	    $env{'internal.head.redirect'} = $url;
                   3689: 	}
1.313     albertel 3690: 	$result.=<<ADDMETA
                   3691: <meta http-equiv="pragma" content="no-cache" />
1.344     albertel 3692: <meta http-equiv="Refresh" content="$time; url=$url" />
1.313     albertel 3693: ADDMETA
                   3694:     }
1.306     albertel 3695:     if (!defined($title)) {
                   3696: 	$title = 'The LearningOnline Network with CAPA';
                   3697:     }
                   3698:     
1.414     albertel 3699:     $result .= '<title> LON-CAPA '.&mt($title).'</title>'
                   3700: 	.'<link rel="stylesheet" type="text/css" href="'.$url.'" />'
                   3701: 	.$head_extra;
1.306     albertel 3702:     return $result;
                   3703: }
                   3704: 
                   3705: =pod
                   3706: 
                   3707: =over 4
                   3708: 
1.340     albertel 3709: =item * &font_settings()
                   3710: 
                   3711: Returns neccessary <meta> to set the proper encoding
                   3712: 
                   3713: Inputs: none
                   3714: 
                   3715: =back
                   3716: 
                   3717: =cut
                   3718: 
                   3719: sub font_settings {
                   3720:     my $headerstring='';
                   3721:     if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) { 
                   3722: 	$headerstring.=
                   3723: 	    '<meta Content-Type="text/html; charset=x-mac-roman" />';
                   3724:     } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
                   3725: 	$headerstring.=
                   3726: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
                   3727:     }
                   3728:     return $headerstring;
                   3729: }
                   3730: 
1.341     albertel 3731: =pod
                   3732: 
                   3733: =over 4
                   3734: 
                   3735: =item * &xml_begin()
                   3736: 
                   3737: Returns the needed doctype and <html>
                   3738: 
                   3739: Inputs: none
                   3740: 
                   3741: =back
                   3742: 
                   3743: =cut
                   3744: 
                   3745: sub xml_begin {
                   3746:     my $output='';
                   3747: 
1.342     albertel 3748:     &Apache::lonhtmlcommon::init_htmlareafields();
                   3749: 
1.341     albertel 3750:     if ($env{'browser.mathml'}) {
                   3751: 	$output='<?xml version="1.0"?>'
                   3752:             #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
                   3753: #            .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                   3754:             
                   3755: #	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
                   3756: 	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
                   3757:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                   3758: 	    .'xmlns="http://www.w3.org/1999/xhtml">';
                   3759:     } else {
                   3760: 	$output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
                   3761:     }
                   3762:     return $output;
                   3763: }
1.340     albertel 3764: 
                   3765: =pod
                   3766: 
                   3767: =over 4
                   3768: 
1.306     albertel 3769: =item * &endheadtag()
                   3770: 
                   3771: Returns a uniform </head> for LON-CAPA web pages.
                   3772: 
                   3773: Inputs: none
                   3774: 
                   3775: =back
                   3776: 
                   3777: =cut
                   3778: 
                   3779: sub endheadtag {
                   3780:     return '</head>';
                   3781: }
                   3782: 
                   3783: =pod
                   3784: 
                   3785: =over 4
                   3786: 
                   3787: =item * &head()
                   3788: 
                   3789: Returns a uniform complete <head>..</head> section for LON-CAPA web pages.
                   3790: 
                   3791: Inputs: $title - optional title for the page
1.307     albertel 3792:         $head_extra - optional extra HTML to put inside the <head>
1.405     albertel 3793: 
1.306     albertel 3794: =back
                   3795: 
                   3796: =cut
                   3797: 
                   3798: sub head {
1.325     albertel 3799:     my ($title,$head_extra,$args) = @_;
                   3800:     return &headtag($title,$head_extra,$args).&endheadtag();
1.306     albertel 3801: }
                   3802: 
                   3803: =pod
                   3804: 
                   3805: =over 4
                   3806: 
                   3807: =item * &start_page()
                   3808: 
                   3809: Returns a complete <html> .. <body> section for LON-CAPA web pages.
                   3810: 
                   3811: Inputs: $title - optional title for the page
                   3812:         $head_extra - optional extra HTML to incude inside the <head>
1.315     albertel 3813:         $args - additional optional args supported are:
1.317     albertel 3814:                   only_body      -> is true will set &bodytag() onlybodytag
                   3815:                                     arg on
                   3816:                   no_nav_bar     -> is true will set &bodytag() notopbar arg on
                   3817:                   add_entries    -> additional attributes to add to the  <body>
                   3818:                   domain         -> force to color decorate a page for a 
                   3819:                                     specific domain
                   3820:                   function       -> force usage of a specific rolish color
                   3821:                                     scheme
                   3822:                   redirect       -> see &headtag()
                   3823:                   bgcolor        -> override the default page bg color
                   3824:                   js_ready       -> return a string ready for being used in 
                   3825:                                     a javascript writeln
1.320     albertel 3826:                   html_encode    -> return a string ready for being used in 
                   3827:                                     a html attribute
1.317     albertel 3828:                   force_register -> if is true will turn on the &bodytag()
                   3829:                                     $forcereg arg
1.326     albertel 3830:                   body_title     -> alternate text to use instead of $title
                   3831:                                     in the title box that appears, this text
                   3832:                                     is not auto translated like the $title is
1.330     albertel 3833:                   frameset       -> if true will start with a <frameset>
                   3834:                                     rather than <body>
1.338     albertel 3835:                   no_title       -> if true the title bar won't be shown
                   3836:                   skip_phases    -> hash ref of 
                   3837:                                     head -> skip the <html><head> generation
                   3838:                                     body -> skip all <body> generation
1.337     albertel 3839: 
1.361     albertel 3840:                   no_inline_link -> if true and in remote mode, don't show the 
                   3841:                                     'Switch To Inline Menu' link
                   3842: 
1.306     albertel 3843: =back
                   3844: 
                   3845: =cut
                   3846: 
                   3847: sub start_page {
1.309     albertel 3848:     my ($title,$head_extra,$args) = @_;
1.318     albertel 3849:     #&Apache::lonnet::logthis("start_page ".join(':',caller(0)));
1.313     albertel 3850:     my %head_args;
1.352     albertel 3851:     foreach my $arg ('redirect','force_register','domain','function',
                   3852: 		     'bgcolor') {
1.319     albertel 3853: 	if (defined($args->{$arg})) {
1.324     raeburn  3854: 	    $head_args{$arg} = $args->{$arg};
1.319     albertel 3855: 	}
1.313     albertel 3856:     }
1.319     albertel 3857: 
1.315     albertel 3858:     $env{'internal.start_page'}++;
1.338     albertel 3859:     my $result;
                   3860:     if (! exists($args->{'skip_phases'}{'head'}) ) {
                   3861: 	$result.=
1.341     albertel 3862: 	    &xml_begin().
1.338     albertel 3863: 	    &headtag($title,$head_extra,\%head_args).&endheadtag();
                   3864:     }
                   3865:     
                   3866:     if (! exists($args->{'skip_phases'}{'body'}) ) {
                   3867: 	if ($args->{'frameset'}) {
                   3868: 	    my $attr_string = &make_attr_string($args->{'force_register'},
                   3869: 						$args->{'add_entries'});
                   3870: 	    $result .= "\n<frameset $attr_string>\n";
                   3871: 	} else {
                   3872: 	    $result .=
                   3873: 		&bodytag($title, 
                   3874: 			 $args->{'function'},       $args->{'add_entries'},
                   3875: 			 $args->{'only_body'},      $args->{'domain'},
                   3876: 			 $args->{'force_register'}, $args->{'body_title'},
                   3877: 			 $args->{'no_nav_bar'},     $args->{'bgcolor'},
1.361     albertel 3878: 			 $args->{'no_title'},       $args->{'no_inline_link'});
1.338     albertel 3879: 	}
1.330     albertel 3880:     }
1.338     albertel 3881: 
1.315     albertel 3882:     if ($args->{'js_ready'}) {
1.317     albertel 3883: 	$result = &js_ready($result);
1.315     albertel 3884:     }
1.320     albertel 3885:     if ($args->{'html_encode'}) {
                   3886: 	$result = &html_encode($result);
                   3887:     }
1.315     albertel 3888:     return $result;
1.306     albertel 3889: }
                   3890: 
1.330     albertel 3891: 
1.306     albertel 3892: =pod
                   3893: 
                   3894: =over 4
                   3895: 
                   3896: =item * &head()
                   3897: 
                   3898: Returns a complete </body></html> section for LON-CAPA web pages.
                   3899: 
1.315     albertel 3900: Inputs:         $args - additional optional args supported are:
                   3901:                  js_ready     -> return a string ready for being used in 
                   3902:                                  a javascript writeln
1.320     albertel 3903:                  html_encode  -> return a string ready for being used in 
                   3904:                                  a html attribute
1.330     albertel 3905:                  frameset     -> if true will start with a <frameset>
                   3906:                                  rather than <body>
1.306     albertel 3907: 
                   3908: =cut
                   3909: 
                   3910: sub end_page {
1.315     albertel 3911:     my ($args) = @_;
                   3912:     $env{'internal.end_page'}++;
1.330     albertel 3913:     my $result;
1.335     albertel 3914:     if ($args->{'discussion'}) {
                   3915: 	my ($target,$parser);
                   3916: 	if (ref($args->{'discussion'})) {
                   3917: 	    ($target,$parser) =($args->{'discussion'}{'target'},
                   3918: 				$args->{'discussion'}{'parser'});
                   3919: 	}
                   3920: 	$result .= &Apache::lonxml::xmlend($target,$parser);
                   3921:     }
                   3922: 
1.330     albertel 3923:     if ($args->{'frameset'}) {
                   3924: 	$result .= '</frameset>';
                   3925:     } else {
                   3926: 	$result .= &endbodytag();
                   3927:     }
                   3928:     $result .= "\n</html>";
                   3929: 
1.315     albertel 3930:     if ($args->{'js_ready'}) {
1.317     albertel 3931: 	$result = &js_ready($result);
1.315     albertel 3932:     }
1.335     albertel 3933: 
1.320     albertel 3934:     if ($args->{'html_encode'}) {
                   3935: 	$result = &html_encode($result);
                   3936:     }
1.335     albertel 3937: 
1.315     albertel 3938:     return $result;
                   3939: }
                   3940: 
1.320     albertel 3941: sub html_encode {
                   3942:     my ($result) = @_;
                   3943: 
1.322     albertel 3944:     $result = &HTML::Entities::encode($result,'<>&"');
1.320     albertel 3945:     
                   3946:     return $result;
                   3947: }
1.317     albertel 3948: sub js_ready {
                   3949:     my ($result) = @_;
                   3950: 
1.323     albertel 3951:     $result =~ s/[\n\r]/ /xmsg;
                   3952:     $result =~ s/\\/\\\\/xmsg;
                   3953:     $result =~ s/'/\\'/xmsg;
1.372     albertel 3954:     $result =~ s{</}{<\\/}xmsg;
1.317     albertel 3955:     
                   3956:     return $result;
                   3957: }
                   3958: 
1.315     albertel 3959: sub validate_page {
                   3960:     if (  exists($env{'internal.start_page'})
1.316     albertel 3961: 	  &&     $env{'internal.start_page'} > 1) {
                   3962: 	&Apache::lonnet::logthis('start_page called multiple times '.
1.318     albertel 3963: 				 $env{'internal.start_page'}.' '.
1.316     albertel 3964: 				 $ENV{'request.filename'});
1.315     albertel 3965:     }
                   3966:     if (  exists($env{'internal.end_page'})
1.316     albertel 3967: 	  &&     $env{'internal.end_page'} > 1) {
                   3968: 	&Apache::lonnet::logthis('end_page called multiple times '.
1.318     albertel 3969: 				 $env{'internal.end_page'}.' '.
1.316     albertel 3970: 				 $env{'request.filename'});
1.315     albertel 3971:     }
                   3972:     if (     exists($env{'internal.start_page'})
                   3973: 	&& ! exists($env{'internal.end_page'})) {
1.316     albertel 3974: 	&Apache::lonnet::logthis('start_page called without end_page '.
                   3975: 				 $env{'request.filename'});
1.315     albertel 3976:     }
                   3977:     if (   ! exists($env{'internal.start_page'})
                   3978: 	&&   exists($env{'internal.end_page'})) {
1.316     albertel 3979: 	&Apache::lonnet::logthis('end_page called without start_page'.
                   3980: 				 $env{'request.filename'});
1.315     albertel 3981:     }
1.306     albertel 3982: }
1.315     albertel 3983: 
1.318     albertel 3984: sub simple_error_page {
                   3985:     my ($r,$title,$msg) = @_;
                   3986:     my $page =
                   3987: 	&Apache::loncommon::start_page($title).
                   3988: 	&mt($msg).
                   3989: 	&Apache::loncommon::end_page();
                   3990:     if (ref($r)) {
                   3991: 	$r->print($page);
1.327     albertel 3992: 	return;
1.318     albertel 3993:     }
                   3994:     return $page;
                   3995: }
1.347     albertel 3996: 
                   3997: {
                   3998:     my $row_count;
                   3999:     sub start_data_table {
1.422     albertel 4000: 	my ($add_class) = @_;
                   4001: 	my $css_class = (join(' ','LC_data_table',$add_class));
1.347     albertel 4002: 	undef($row_count);
1.422     albertel 4003: 	return '<table class="'.$css_class.'">'."\n";
1.347     albertel 4004:     }
                   4005: 
                   4006:     sub end_data_table {
                   4007: 	undef($row_count);
1.389     albertel 4008: 	return '</table>'."\n";;
1.347     albertel 4009:     }
                   4010: 
                   4011:     sub start_data_table_row {
1.422     albertel 4012: 	my ($add_class) = @_;
1.347     albertel 4013: 	$row_count++;
1.422     albertel 4014: 	my $css_class = ($row_count % 2)?'':'LC_even_row';
1.428     albertel 4015: 	$css_class = (join(' ',$css_class,$add_class));
1.422     albertel 4016: 	return  '<tr class="'.$css_class.'">'."\n";;
1.347     albertel 4017:     }
                   4018: 
                   4019:     sub end_data_table_row {
1.389     albertel 4020: 	return '</tr>'."\n";;
1.347     albertel 4021:     }
1.367     www      4022: 
1.421     albertel 4023:     sub start_data_table_empty_row {
                   4024: 	$row_count++;
                   4025: 	return  '<tr class="LC_empty_row" >'."\n";;
                   4026:     }
                   4027: 
                   4028:     sub end_data_table_empty_row {
                   4029: 	return '</tr>'."\n";;
                   4030:     }
                   4031: 
1.367     www      4032:     sub start_data_table_header_row {
1.389     albertel 4033: 	return  '<tr class="LC_header_row">'."\n";;
1.367     www      4034:     }
                   4035: 
                   4036:     sub end_data_table_header_row {
1.389     albertel 4037: 	return '</tr>'."\n";;
1.367     www      4038:     }
1.347     albertel 4039: }
                   4040: 
1.251     albertel 4041: ###############################################
1.182     matthew  4042: 
                   4043: =pod
                   4044: 
1.405     albertel 4045: =item * &get_users_function()
1.182     matthew  4046: 
                   4047: Used by &bodytag to determine the current users primary role.
                   4048: Returns either 'student','coordinator','admin', or 'author'.
                   4049: 
                   4050: =cut
                   4051: 
                   4052: ###############################################
                   4053: sub get_users_function {
                   4054:     my $function = 'student';
1.258     albertel 4055:     if ($env{'request.role'}=~/^(cc|in|ta|ep)/) {
1.182     matthew  4056:         $function='coordinator';
                   4057:     }
1.258     albertel 4058:     if ($env{'request.role'}=~/^(su|dc|ad|li)/) {
1.182     matthew  4059:         $function='admin';
                   4060:     }
1.258     albertel 4061:     if (($env{'request.role'}=~/^(au|ca)/) ||
1.182     matthew  4062:         ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
                   4063:         $function='author';
                   4064:     }
                   4065:     return $function;
1.54      www      4066: }
1.99      www      4067: 
                   4068: ###############################################
                   4069: 
1.233     raeburn  4070: =pod
                   4071: 
1.405     albertel 4072: =item * &check_user_status
1.274     raeburn  4073: 
                   4074: Determines current status of supplied role for a
                   4075: specific user. Roles can be active, previous or future.
                   4076: 
                   4077: Inputs: 
                   4078: user's domain, user's username, course's domain,
1.375     raeburn  4079: course's number, optional section ID.
1.274     raeburn  4080: 
                   4081: Outputs:
                   4082: role status: active, previous or future. 
                   4083: 
                   4084: =cut
                   4085: 
                   4086: sub check_user_status {
1.412     raeburn  4087:     my ($udom,$uname,$cdom,$crs,$role,$sec) = @_;
1.274     raeburn  4088:     my %userinfo = &Apache::lonnet::dump('roles',$udom,$uname);
                   4089:     my @uroles = keys %userinfo;
                   4090:     my $srchstr;
                   4091:     my $active_chk = 'none';
1.412     raeburn  4092:     my $now = time;
1.274     raeburn  4093:     if (@uroles > 0) {
1.412     raeburn  4094:         if (($role eq 'cc') || ($sec eq '') || (!defined($sec))) {
1.274     raeburn  4095:             $srchstr = '/'.$cdom.'/'.$crs.'_'.$role;
                   4096:         } else {
1.412     raeburn  4097:             $srchstr = '/'.$cdom.'/'.$crs.'/'.$sec.'_'.$role;
                   4098:         }
                   4099:         if (grep/^\Q$srchstr\E$/,@uroles) {
1.274     raeburn  4100:             my $role_end = 0;
                   4101:             my $role_start = 0;
                   4102:             $active_chk = 'active';
1.412     raeburn  4103:             if ($userinfo{$srchstr} =~ m/^\Q$role\E_(\d+)/) {
                   4104:                 $role_end = $1;
                   4105:                 if ($userinfo{$srchstr} =~ m/^\Q$role\E_\Q$role_end\E_(\d+)$/) {
                   4106:                     $role_start = $1;
1.274     raeburn  4107:                 }
                   4108:             }
                   4109:             if ($role_start > 0) {
1.412     raeburn  4110:                 if ($now < $role_start) {
1.274     raeburn  4111:                     $active_chk = 'future';
                   4112:                 }
                   4113:             }
                   4114:             if ($role_end > 0) {
1.412     raeburn  4115:                 if ($now > $role_end) {
1.274     raeburn  4116:                     $active_chk = 'previous';
                   4117:                 }
                   4118:             }
                   4119:         }
                   4120:     }
                   4121:     return $active_chk;
                   4122: }
                   4123: 
                   4124: ###############################################
                   4125: 
                   4126: =pod
                   4127: 
1.405     albertel 4128: =item * &get_sections()
1.233     raeburn  4129: 
                   4130: Determines all the sections for a course including
                   4131: sections with students and sections containing other roles.
1.419     raeburn  4132: Incoming parameters: 
                   4133: 
                   4134: 1. domain
                   4135: 2. course number 
                   4136: 3. reference to array containing roles for which sections should 
                   4137: be gathered (optional).
                   4138: 4. reference to array containing status types for which sections 
                   4139: should be gathered (optional).
                   4140: 
                   4141: If the third argument is undefined, sections are gathered for any role. 
                   4142: If the fourth argument is undefined, sections are gathered for any status.
                   4143: Permissible values are 'active' or 'future' or 'previous'.
1.233     raeburn  4144:  
1.374     raeburn  4145: Returns section hash (keys are section IDs, values are
                   4146: number of users in each section), subject to the
1.419     raeburn  4147: optional roles filter, optional status filter 
1.233     raeburn  4148: 
                   4149: =cut
                   4150: 
                   4151: ###############################################
                   4152: sub get_sections {
1.419     raeburn  4153:     my ($cdom,$cnum,$possible_roles,$possible_status) = @_;
1.366     albertel 4154:     if (!defined($cdom) || !defined($cnum)) {
                   4155:         my $cid =  $env{'request.course.id'};
                   4156: 
                   4157: 	return if (!defined($cid));
                   4158: 
                   4159:         $cdom = $env{'course.'.$cid.'.domain'};
                   4160:         $cnum = $env{'course.'.$cid.'.num'};
                   4161:     }
                   4162: 
                   4163:     my %sectioncount;
1.419     raeburn  4164:     my $now = time;
1.240     albertel 4165: 
1.366     albertel 4166:     if (!defined($possible_roles) || (grep(/^st$/,@$possible_roles))) {
1.276     albertel 4167: 	my ($classlist) = &Apache::loncoursedata::get_classlist($cdom,$cnum);
1.240     albertel 4168: 	my $sec_index = &Apache::loncoursedata::CL_SECTION();
                   4169: 	my $status_index = &Apache::loncoursedata::CL_STATUS();
1.419     raeburn  4170:         my $start_index = &Apache::loncoursedata::CL_START();
                   4171:         my $end_index = &Apache::loncoursedata::CL_END();
                   4172:         my $status;
1.366     albertel 4173: 	while (my ($student,$data) = each(%$classlist)) {
1.419     raeburn  4174: 	    my ($section,$stu_status,$start,$end) = ($data->[$sec_index],
                   4175: 				                     $data->[$status_index],
                   4176:                                                      $data->[$start_index],
                   4177:                                                      $data->[$end_index]);
                   4178:             if ($stu_status eq 'Active') {
                   4179:                 $status = 'active';
                   4180:             } elsif ($end < $now) {
                   4181:                 $status = 'previous';
                   4182:             } elsif ($start > $now) {
                   4183:                 $status = 'future';
                   4184:             } 
                   4185: 	    if ($section ne '-1' && $section !~ /^\s*$/) {
                   4186:                 if ((!defined($possible_status)) || (($status ne '') && 
                   4187:                     (grep/^\Q$status\E$/,@{$possible_status}))) { 
                   4188: 		    $sectioncount{$section}++;
                   4189:                 }
1.240     albertel 4190: 	    }
                   4191: 	}
                   4192:     }
                   4193:     my %courseroles = &Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
                   4194:     foreach my $user (sort(keys(%courseroles))) {
                   4195: 	if ($user !~ /^(\w{2})/) { next; }
                   4196: 	my ($role) = ($user =~ /^(\w{2})/);
                   4197: 	if ($possible_roles && !(grep(/^$role$/,@$possible_roles))) { next; }
1.419     raeburn  4198: 	my ($section,$status);
1.240     albertel 4199: 	if ($role eq 'cr' &&
                   4200: 	    $user =~ m-^$role/[^/]*/[^/]*/[^/]*:[^:]*:[^:]*:(\w+)-) {
                   4201: 	    $section=$1;
                   4202: 	}
                   4203: 	if ($user =~ /^$role:[^:]*:[^:]*:(\w+)/) { $section=$1; }
                   4204: 	if (!defined($section) || $section eq '-1') { next; }
1.419     raeburn  4205:         my ($end,$start) = ($courseroles{$user} =~ /^([^:]*):([^:]*)$/);
                   4206:         if ($end == -1 && $start == -1) {
                   4207:             next; #deleted role
                   4208:         }
                   4209:         if (!defined($possible_status)) { 
                   4210:             $sectioncount{$section}++;
                   4211:         } else {
                   4212:             if ((!$end || $end >= $now) && (!$start || $start <= $now)) {
                   4213:                 $status = 'active';
                   4214:             } elsif ($end < $now) {
                   4215:                 $status = 'future';
                   4216:             } elsif ($start > $now) {
                   4217:                 $status = 'previous';
                   4218:             }
                   4219:             if (($status ne '') && (grep/^\Q$status\E$/,@{$possible_status})) {
                   4220:                 $sectioncount{$section}++;
                   4221:             }
                   4222:         }
1.233     raeburn  4223:     }
1.366     albertel 4224:     return %sectioncount;
1.233     raeburn  4225: }
                   4226: 
1.274     raeburn  4227: ###############################################
1.294     raeburn  4228: 
                   4229: =pod
1.405     albertel 4230: 
                   4231: =item * &get_course_users()
                   4232: 
1.275     raeburn  4233: Retrieves usernames:domains for users in the specified course
                   4234: with specific role(s), and access status. 
                   4235: 
                   4236: Incoming parameters:
1.277     albertel 4237: 1. course domain
                   4238: 2. course number
                   4239: 3. access status: users must have - either active, 
1.275     raeburn  4240: previous, future, or all.
1.277     albertel 4241: 4. reference to array of permissible roles
1.288     raeburn  4242: 5. reference to array of section restrictions (optional)
                   4243: 6. reference to results object (hash of hashes).
                   4244: 7. reference to optional userdata hash
1.275     raeburn  4245: Keys of top level hash are roles.
                   4246: Keys of inner hashes are username:domain, with 
                   4247: values set to access type.
1.288     raeburn  4248: Optional userdata hash returns an array with arguments in the 
                   4249: same order as loncoursedata::get_classlist() for student data.
                   4250: 
                   4251: Entries for end, start, section and status are blank because
                   4252: of the possibility of multiple values for non-student roles.
                   4253: 
1.275     raeburn  4254: =cut
1.405     albertel 4255: 
1.275     raeburn  4256: ###############################################
1.405     albertel 4257: 
1.275     raeburn  4258: sub get_course_users {
1.288     raeburn  4259:     my ($cdom,$cnum,$types,$roles,$sections,$users,$userdata) = @_;
                   4260:     my %idx = ();
1.419     raeburn  4261:     my %seclists;
1.288     raeburn  4262: 
                   4263:     $idx{udom} = &Apache::loncoursedata::CL_SDOM();
                   4264:     $idx{uname} =  &Apache::loncoursedata::CL_SNAME();
                   4265:     $idx{end} = &Apache::loncoursedata::CL_END();
                   4266:     $idx{start} = &Apache::loncoursedata::CL_START();
                   4267:     $idx{id} = &Apache::loncoursedata::CL_ID();
                   4268:     $idx{section} = &Apache::loncoursedata::CL_SECTION();
                   4269:     $idx{fullname} = &Apache::loncoursedata::CL_FULLNAME();
                   4270:     $idx{status} = &Apache::loncoursedata::CL_STATUS();
                   4271: 
1.290     albertel 4272:     if (grep(/^st$/,@{$roles})) {
1.276     albertel 4273:         my ($classlist,$keylist)=&Apache::loncoursedata::get_classlist($cdom,$cnum);
1.278     raeburn  4274:         my $now = time;
1.277     albertel 4275:         foreach my $student (keys(%{$classlist})) {
1.288     raeburn  4276:             my $match = 0;
1.412     raeburn  4277:             my $secmatch = 0;
1.419     raeburn  4278:             my $section = $$classlist{$student}[$idx{section}];
                   4279:             if ($section eq '') {
                   4280:                 $section = 'none';
                   4281:             }
1.291     albertel 4282:             if ((ref($sections) eq 'ARRAY') && (@{$sections} > 0)) {
1.420     albertel 4283:                 if (grep(/^all$/,@{$sections})) {
1.412     raeburn  4284:                     $secmatch = 1;
                   4285:                 } elsif ($$classlist{$student}[$idx{section}] eq '') {
1.420     albertel 4286:                     if (grep(/^none$/,@{$sections})) {
1.412     raeburn  4287:                         $secmatch = 1;
                   4288:                     }
                   4289:                 } else {  
1.419     raeburn  4290: 		    if (grep(/^\Q$section\E$/,@{$sections})) {
1.412     raeburn  4291: 		        $secmatch = 1;
                   4292:                     }
1.290     albertel 4293: 		}
1.412     raeburn  4294:                 if (!$secmatch) {
                   4295:                     next;
                   4296:                 }
1.419     raeburn  4297:             }
1.420     albertel 4298:             push(@{$seclists{$student}},$section); 
1.275     raeburn  4299:             if (defined($$types{'active'})) {
1.288     raeburn  4300:                 if ($$classlist{$student}[$idx{status}] eq 'Active') {
1.275     raeburn  4301:                     push(@{$$users{st}{$student}},'active');
1.288     raeburn  4302:                     $match = 1;
1.275     raeburn  4303:                 }
                   4304:             }
                   4305:             if (defined($$types{'previous'})) {
1.288     raeburn  4306:                 if ($$classlist{$student}[$idx{end}] <= $now) {
1.275     raeburn  4307:                     push(@{$$users{st}{$student}},'previous');
1.288     raeburn  4308:                     $match = 1;
1.275     raeburn  4309:                 }
                   4310:             }
                   4311:             if (defined($$types{'future'})) {
1.288     raeburn  4312:                 if (($$classlist{$student}[$idx{start}] > $now) && ($$classlist{$student}[$idx{end}] > $now) || ($$classlist{$student}[$idx{end}] == 0) || ($$classlist{$student}[$idx{end}] eq '')) {
1.275     raeburn  4313:                     push(@{$$users{st}{$student}},'future');
1.288     raeburn  4314:                     $match = 1;
1.275     raeburn  4315:                 }
                   4316:             }
1.412     raeburn  4317:             if ($match && ref($userdata) eq 'HASH') {
1.288     raeburn  4318:                 $$userdata{$student} = $$classlist{$student};
                   4319:             }
1.275     raeburn  4320:         }
                   4321:     }
1.412     raeburn  4322:     if ((@{$roles} > 1) || ((@{$roles} == 1) && ($$roles[0] ne "st"))) {
1.275     raeburn  4323:         my @coursepersonnel = &Apache::lonnet::getkeys('nohist_userroles',$cdom,$cnum);
                   4324:         foreach my $person (@coursepersonnel) {
1.288     raeburn  4325:             my $match = 0;
1.412     raeburn  4326:             my $secmatch = 0;
                   4327:             my ($role,$user,$usec) = ($person =~ /^([^:]*):([^:]+:[^:]+):([^:]*)/);
1.275     raeburn  4328:             $user =~ s/:$//;
1.290     albertel 4329:             if (($role) && (grep(/^\Q$role\E$/,@{$roles}))) {
1.412     raeburn  4330:                 my ($uname,$udom) = split(/:/,$user);
                   4331:                 if ((ref($sections) eq 'ARRAY') && (@{$sections} > 0)) {
1.420     albertel 4332:                     if (grep(/^all$/,@{$sections})) {
1.412     raeburn  4333:                         $secmatch = 1;
                   4334:                     } elsif ($usec eq '') {
1.420     albertel 4335:                         if (grep(/^none$/,@{$sections})) {
1.412     raeburn  4336:                             $secmatch = 1;
                   4337:                         }
                   4338:                     } else {
                   4339:                         if (grep(/^\Q$usec\E$/,@{$sections})) {
                   4340:                             $secmatch = 1;
                   4341:                         }
                   4342:                     }
                   4343:                     if (!$secmatch) {
                   4344:                         next;
                   4345:                     }
1.288     raeburn  4346:                 }
1.419     raeburn  4347:                 if ($usec eq '') {
                   4348:                     $usec = 'none';
                   4349:                 }
1.275     raeburn  4350:                 if ($uname ne '' && $udom ne '') {
1.412     raeburn  4351:                     my $status = &check_user_status($udom,$uname,$cdom,$cnum,$role,
                   4352:                                                     $usec);
1.277     albertel 4353:                     foreach my $type (keys(%{$types})) { 
1.275     raeburn  4354:                         if ($status eq $type) {
1.420     albertel 4355:                             if (!grep(/^\Q$type\E$/,@{$$users{$role}{$user}})) {
1.419     raeburn  4356:                                 push(@{$$users{$role}{$user}},$type);
                   4357:                             }
1.288     raeburn  4358:                             $match = 1;
                   4359:                         }
                   4360:                     }
1.419     raeburn  4361:                     if (($match) && (ref($userdata) eq 'HASH')) {
                   4362:                         if (!exists($$userdata{$uname.':'.$udom})) {
                   4363: 			    &get_user_info($udom,$uname,\%idx,$userdata);
                   4364:                         }
1.420     albertel 4365:                         if (!grep(/^\Q$usec\E$/,@{$seclists{$uname.':'.$udom}})) {
1.419     raeburn  4366:                             push(@{$seclists{$uname.':'.$udom}},$usec);
                   4367:                         }
1.275     raeburn  4368:                     }
                   4369:                 }
                   4370:             }
                   4371:         }
1.290     albertel 4372:         if (grep(/^ow$/,@{$roles})) {
1.279     raeburn  4373:             if ((defined($cdom)) && (defined($cnum))) {
                   4374:                 my %csettings = &Apache::lonnet::get('environment',['internal.courseowner'],$cdom,$cnum);
                   4375:                 if ( defined($csettings{'internal.courseowner'}) ) {
                   4376:                     my $owner = $csettings{'internal.courseowner'};
1.288     raeburn  4377:                     @{$$users{'ow'}{$owner.':'.$cdom}} = 'any';
1.290     albertel 4378:                     if (defined($userdata) && 
                   4379: 			!exists($$userdata{$owner.':'.$cdom})) {
                   4380: 			&get_user_info($cdom,$owner,\%idx,$userdata);
1.420     albertel 4381:                         if (!grep(/^none$/,@{$seclists{$owner.':'.$cdom}})) {
1.419     raeburn  4382:                             push(@{$seclists{$owner.':'.$cdom}},'none');
                   4383:                         }
1.290     albertel 4384: 		    }
1.279     raeburn  4385:                 }
                   4386:             }
                   4387:         }
1.419     raeburn  4388:         foreach my $user (keys(%seclists)) {
                   4389:             @{$seclists{$user}} = (sort {$a <=> $b} @{$seclists{$user}});
                   4390:             $$userdata{$user}[$idx{section}] = join(',',@{$seclists{$user}});
                   4391:         }
1.275     raeburn  4392:     }
                   4393:     return;
                   4394: }
                   4395: 
1.288     raeburn  4396: sub get_user_info {
                   4397:     my ($udom,$uname,$idx,$userdata) = @_;
1.289     albertel 4398:     $$userdata{$uname.':'.$udom}[$$idx{fullname}] = 
                   4399: 	&plainname($uname,$udom,'lastname');
1.291     albertel 4400:     $$userdata{$uname.':'.$udom}[$$idx{uname}] = $uname;
1.297     raeburn  4401:     $$userdata{$uname.':'.$udom}[$$idx{udom}] = $udom;
1.288     raeburn  4402:     return;
                   4403: }
1.275     raeburn  4404: 
1.384     raeburn  4405: sub get_secgrprole_info {
                   4406:     my ($cdom,$cnum,$needroles,$type)  = @_;
                   4407:     my %sections_count = &get_sections($cdom,$cnum);
                   4408:     my @sections =  (sort {$a <=> $b} keys(%sections_count));
                   4409:     my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
                   4410:     my @groups = sort(keys(%curr_groups));
                   4411:     my $allroles = [];
                   4412:     my $rolehash;
                   4413:     my $accesshash = {
                   4414:                      active => 'Currently has access',
                   4415:                      future => 'Will have future access',
                   4416:                      previous => 'Previously had access',
                   4417:                   };
                   4418:     if ($needroles) {
                   4419:         $rolehash = {'all' => 'all'};
1.385     albertel 4420:         my %user_roles = &Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
                   4421: 	if (&Apache::lonnet::error(%user_roles)) {
                   4422: 	    undef(%user_roles);
                   4423: 	}
                   4424:         foreach my $item (keys(%user_roles)) {
1.384     raeburn  4425:             my ($role)=split(/\:/,$item,2);
                   4426:             if ($role eq 'cr') { next; }
                   4427:             if ($role =~ /^cr/) {
                   4428:                 $$rolehash{$role} = (split('/',$role))[3];
                   4429:             } else {
                   4430:                 $$rolehash{$role} = &Apache::lonnet::plaintext($role,$type);
                   4431:             }
                   4432:         }
                   4433:         foreach my $key (sort(keys(%{$rolehash}))) {
                   4434:             push(@{$allroles},$key);
                   4435:         }
                   4436:         push (@{$allroles},'st');
                   4437:         $$rolehash{'st'} = &Apache::lonnet::plaintext('st',$type);
                   4438:     }
                   4439:     return (\@sections,\@groups,$allroles,$rolehash,$accesshash);
                   4440: }
                   4441: 
1.112     bowersj2 4442: =pod
                   4443: 
                   4444: =item * get_unprocessed_cgi($query,$possible_names)
                   4445: 
1.258     albertel 4446: Modify the %env hash to contain unprocessed CGI form parameters held in
1.112     bowersj2 4447: $query.  The parameters listed in $possible_names (an array reference),
1.258     albertel 4448: will be set in $env{'form.name'} if they do not already exist.
1.112     bowersj2 4449: 
                   4450: Typically called with $ENV{'QUERY_STRING'} as the first parameter.  
                   4451: $possible_names is an ref to an array of form element names.  As an example:
                   4452: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
1.258     albertel 4453: will result in $env{'form.uname'} and $env{'form.udom'} being set.
1.112     bowersj2 4454: 
                   4455: =cut
1.1       albertel 4456: 
1.6       albertel 4457: sub get_unprocessed_cgi {
1.25      albertel 4458:   my ($query,$possible_names)= @_;
1.26      matthew  4459:   # $Apache::lonxml::debug=1;
1.356     albertel 4460:   foreach my $pair (split(/&/,$query)) {
                   4461:     my ($name, $value) = split(/=/,$pair);
1.369     www      4462:     $name = &unescape($name);
1.25      albertel 4463:     if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
                   4464:       $value =~ tr/+/ /;
                   4465:       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.258     albertel 4466:       unless (defined($env{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
1.25      albertel 4467:     }
1.16      harris41 4468:   }
1.6       albertel 4469: }
                   4470: 
1.112     bowersj2 4471: =pod
                   4472: 
                   4473: =item * cacheheader() 
                   4474: 
                   4475: returns cache-controlling header code
                   4476: 
                   4477: =cut
                   4478: 
1.7       albertel 4479: sub cacheheader {
1.258     albertel 4480:     unless ($env{'request.method'} eq 'GET') { return ''; }
1.216     albertel 4481:     my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
                   4482:     my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
1.7       albertel 4483:                 <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
                   4484:                 <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
1.216     albertel 4485:     return $output;
1.7       albertel 4486: }
                   4487: 
1.112     bowersj2 4488: =pod
                   4489: 
                   4490: =item * no_cache($r) 
                   4491: 
                   4492: specifies header code to not have cache
                   4493: 
                   4494: =cut
                   4495: 
1.9       albertel 4496: sub no_cache {
1.216     albertel 4497:     my ($r) = @_;
                   4498:     if ($ENV{'REQUEST_METHOD'} ne 'GET' &&
1.258     albertel 4499: 	$env{'request.method'} ne 'GET') { return ''; }
1.216     albertel 4500:     my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime(time));
                   4501:     $r->no_cache(1);
                   4502:     $r->header_out("Expires" => $date);
                   4503:     $r->header_out("Pragma" => "no-cache");
1.123     www      4504: }
                   4505: 
                   4506: sub content_type {
1.181     albertel 4507:     my ($r,$type,$charset) = @_;
1.299     foxr     4508:     if ($r) {
                   4509: 	#  Note that printout.pl calls this with undef for $r.
                   4510: 	&no_cache($r);
                   4511:     }
1.258     albertel 4512:     if ($env{'browser.mathml'} && $type eq 'text/html') { $type='text/xml'; }
1.181     albertel 4513:     unless ($charset) {
                   4514: 	$charset=&Apache::lonlocal::current_encoding;
                   4515:     }
                   4516:     if ($charset) { $type.='; charset='.$charset; }
                   4517:     if ($r) {
                   4518: 	$r->content_type($type);
                   4519:     } else {
                   4520: 	print("Content-type: $type\n\n");
                   4521:     }
1.9       albertel 4522: }
1.25      albertel 4523: 
1.112     bowersj2 4524: =pod
                   4525: 
                   4526: =item * add_to_env($name,$value) 
                   4527: 
1.258     albertel 4528: adds $name to the %env hash with value
1.112     bowersj2 4529: $value, if $name already exists, the entry is converted to an array
                   4530: reference and $value is added to the array.
                   4531: 
                   4532: =cut
                   4533: 
1.25      albertel 4534: sub add_to_env {
                   4535:   my ($name,$value)=@_;
1.258     albertel 4536:   if (defined($env{$name})) {
                   4537:     if (ref($env{$name})) {
1.25      albertel 4538:       #already have multiple values
1.258     albertel 4539:       push(@{ $env{$name} },$value);
1.25      albertel 4540:     } else {
                   4541:       #first time seeing multiple values, convert hash entry to an arrayref
1.258     albertel 4542:       my $first=$env{$name};
                   4543:       undef($env{$name});
                   4544:       push(@{ $env{$name} },$first,$value);
1.25      albertel 4545:     }
                   4546:   } else {
1.258     albertel 4547:     $env{$name}=$value;
1.25      albertel 4548:   }
1.31      albertel 4549: }
1.149     albertel 4550: 
                   4551: =pod
                   4552: 
                   4553: =item * get_env_multiple($name) 
                   4554: 
1.258     albertel 4555: gets $name from the %env hash, it seemlessly handles the cases where multiple
1.149     albertel 4556: values may be defined and end up as an array ref.
                   4557: 
                   4558: returns an array of values
                   4559: 
                   4560: =cut
                   4561: 
                   4562: sub get_env_multiple {
                   4563:     my ($name) = @_;
                   4564:     my @values;
1.258     albertel 4565:     if (defined($env{$name})) {
1.149     albertel 4566:         # exists is it an array
1.258     albertel 4567:         if (ref($env{$name})) {
                   4568:             @values=@{ $env{$name} };
1.149     albertel 4569:         } else {
1.258     albertel 4570:             $values[0]=$env{$name};
1.149     albertel 4571:         }
                   4572:     }
                   4573:     return(@values);
                   4574: }
                   4575: 
1.31      albertel 4576: 
1.41      ng       4577: =pod
1.45      matthew  4578: 
                   4579: =back 
1.41      ng       4580: 
1.112     bowersj2 4581: =head1 CSV Upload/Handling functions
1.38      albertel 4582: 
1.41      ng       4583: =over 4
                   4584: 
1.112     bowersj2 4585: =item * upfile_store($r)
1.41      ng       4586: 
                   4587: Store uploaded file, $r should be the HTTP Request object,
1.258     albertel 4588: needs $env{'form.upfile'}
1.41      ng       4589: returns $datatoken to be put into hidden field
                   4590: 
                   4591: =cut
1.31      albertel 4592: 
                   4593: sub upfile_store {
                   4594:     my $r=shift;
1.258     albertel 4595:     $env{'form.upfile'}=~s/\r/\n/gs;
                   4596:     $env{'form.upfile'}=~s/\f/\n/gs;
                   4597:     $env{'form.upfile'}=~s/\n+/\n/gs;
                   4598:     $env{'form.upfile'}=~s/\n+$//gs;
1.31      albertel 4599: 
1.258     albertel 4600:     my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
                   4601: 	'_enroll_'.$env{'request.course.id'}.'_'.time.'_'.$$;
1.31      albertel 4602:     {
1.158     raeburn  4603:         my $datafile = $r->dir_config('lonDaemons').
                   4604:                            '/tmp/'.$datatoken.'.tmp';
                   4605:         if ( open(my $fh,">$datafile") ) {
1.258     albertel 4606:             print $fh $env{'form.upfile'};
1.158     raeburn  4607:             close($fh);
                   4608:         }
1.31      albertel 4609:     }
                   4610:     return $datatoken;
                   4611: }
                   4612: 
1.56      matthew  4613: =pod
                   4614: 
1.112     bowersj2 4615: =item * load_tmp_file($r)
1.41      ng       4616: 
                   4617: Load uploaded file from tmp, $r should be the HTTP Request object,
1.258     albertel 4618: needs $env{'form.datatoken'},
                   4619: sets $env{'form.upfile'} to the contents of the file
1.41      ng       4620: 
                   4621: =cut
1.31      albertel 4622: 
                   4623: sub load_tmp_file {
                   4624:     my $r=shift;
                   4625:     my @studentdata=();
                   4626:     {
1.158     raeburn  4627:         my $studentfile = $r->dir_config('lonDaemons').
1.258     albertel 4628:                               '/tmp/'.$env{'form.datatoken'}.'.tmp';
1.158     raeburn  4629:         if ( open(my $fh,"<$studentfile") ) {
                   4630:             @studentdata=<$fh>;
                   4631:             close($fh);
                   4632:         }
1.31      albertel 4633:     }
1.258     albertel 4634:     $env{'form.upfile'}=join('',@studentdata);
1.31      albertel 4635: }
                   4636: 
1.56      matthew  4637: =pod
                   4638: 
1.112     bowersj2 4639: =item * upfile_record_sep()
1.41      ng       4640: 
                   4641: Separate uploaded file into records
                   4642: returns array of records,
1.258     albertel 4643: needs $env{'form.upfile'} and $env{'form.upfiletype'}
1.41      ng       4644: 
                   4645: =cut
1.31      albertel 4646: 
                   4647: sub upfile_record_sep {
1.258     albertel 4648:     if ($env{'form.upfiletype'} eq 'xml') {
1.31      albertel 4649:     } else {
1.248     albertel 4650: 	my @records;
1.258     albertel 4651: 	foreach my $line (split(/\n/,$env{'form.upfile'})) {
1.248     albertel 4652: 	    if ($line=~/^\s*$/) { next; }
                   4653: 	    push(@records,$line);
                   4654: 	}
                   4655: 	return @records;
1.31      albertel 4656:     }
                   4657: }
                   4658: 
1.56      matthew  4659: =pod
                   4660: 
1.112     bowersj2 4661: =item * record_sep($record)
1.41      ng       4662: 
1.258     albertel 4663: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $env{'form.upfiletype'}
1.41      ng       4664: 
                   4665: =cut
                   4666: 
1.263     www      4667: sub takeleft {
                   4668:     my $index=shift;
                   4669:     return substr('0000'.$index,-4,4);
                   4670: }
                   4671: 
1.31      albertel 4672: sub record_sep {
                   4673:     my $record=shift;
                   4674:     my %components=();
1.258     albertel 4675:     if ($env{'form.upfiletype'} eq 'xml') {
                   4676:     } elsif ($env{'form.upfiletype'} eq 'space') {
1.31      albertel 4677:         my $i=0;
1.356     albertel 4678:         foreach my $field (split(/\s+/,$record)) {
1.31      albertel 4679:             $field=~s/^(\"|\')//;
                   4680:             $field=~s/(\"|\')$//;
1.263     www      4681:             $components{&takeleft($i)}=$field;
1.31      albertel 4682:             $i++;
                   4683:         }
1.258     albertel 4684:     } elsif ($env{'form.upfiletype'} eq 'tab') {
1.31      albertel 4685:         my $i=0;
1.356     albertel 4686:         foreach my $field (split(/\t/,$record)) {
1.31      albertel 4687:             $field=~s/^(\"|\')//;
                   4688:             $field=~s/(\"|\')$//;
1.263     www      4689:             $components{&takeleft($i)}=$field;
1.31      albertel 4690:             $i++;
                   4691:         }
                   4692:     } else {
                   4693:         my @allfields=split(/\,/,$record);
                   4694:         my $i=0;
                   4695:         my $j;
                   4696:         for ($j=0;$j<=$#allfields;$j++) {
                   4697:             my $field=$allfields[$j];
                   4698:             if ($field=~/^\s*(\"|\')/) {
                   4699: 		my $delimiter=$1;
                   4700:                 while (($field!~/$delimiter$/) && ($j<$#allfields)) {
                   4701: 		    $j++;
                   4702: 		    $field.=','.$allfields[$j];
                   4703: 		}
                   4704:                 $field=~s/^\s*$delimiter//;
                   4705:                 $field=~s/$delimiter\s*$//;
                   4706:             }
1.263     www      4707:             $components{&takeleft($i)}=$field;
1.31      albertel 4708: 	    $i++;
                   4709:         }
                   4710:     }
                   4711:     return %components;
                   4712: }
                   4713: 
1.144     matthew  4714: ######################################################
                   4715: ######################################################
                   4716: 
1.56      matthew  4717: =pod
                   4718: 
1.112     bowersj2 4719: =item * upfile_select_html()
1.41      ng       4720: 
1.144     matthew  4721: Return HTML code to select a file from the users machine and specify 
                   4722: the file type.
1.41      ng       4723: 
                   4724: =cut
                   4725: 
1.144     matthew  4726: ######################################################
                   4727: ######################################################
1.31      albertel 4728: sub upfile_select_html {
1.144     matthew  4729:     my %Types = (
                   4730:                  csv   => &mt('CSV (comma separated values, spreadsheet)'),
                   4731:                  space => &mt('Space separated'),
                   4732:                  tab   => &mt('Tabulator separated'),
                   4733: #                 xml   => &mt('HTML/XML'),
                   4734:                  );
                   4735:     my $Str = '<input type="file" name="upfile" size="50" />'.
                   4736:         '<br />Type: <select name="upfiletype">';
                   4737:     foreach my $type (sort(keys(%Types))) {
                   4738:         $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
                   4739:     }
                   4740:     $Str .= "</select>\n";
                   4741:     return $Str;
1.31      albertel 4742: }
                   4743: 
1.301     albertel 4744: sub get_samples {
                   4745:     my ($records,$toget) = @_;
                   4746:     my @samples=({});
                   4747:     my $got=0;
                   4748:     foreach my $rec (@$records) {
                   4749: 	my %temp = &record_sep($rec);
                   4750: 	if (! grep(/\S/, values(%temp))) { next; }
                   4751: 	if (%temp) {
                   4752: 	    $samples[$got]=\%temp;
                   4753: 	    $got++;
                   4754: 	    if ($got == $toget) { last; }
                   4755: 	}
                   4756:     }
                   4757:     return \@samples;
                   4758: }
                   4759: 
1.144     matthew  4760: ######################################################
                   4761: ######################################################
                   4762: 
1.56      matthew  4763: =pod
                   4764: 
1.112     bowersj2 4765: =item * csv_print_samples($r,$records)
1.41      ng       4766: 
                   4767: Prints a table of sample values from each column uploaded $r is an
                   4768: Apache Request ref, $records is an arrayref from
                   4769: &Apache::loncommon::upfile_record_sep
                   4770: 
                   4771: =cut
                   4772: 
1.144     matthew  4773: ######################################################
                   4774: ######################################################
1.31      albertel 4775: sub csv_print_samples {
                   4776:     my ($r,$records) = @_;
1.301     albertel 4777:     my $samples = &get_samples($records,3);
                   4778: 
1.144     matthew  4779:     $r->print(&mt('Samples').'<br /><table border="2"><tr>');
1.356     albertel 4780:     foreach my $sample (sort({$a <=> $b} keys(%{ $samples->[0] }))) { 
                   4781:         $r->print('<th>'.&mt('Column&nbsp;[_1]',($sample+1)).'</th>'); }
1.31      albertel 4782:     $r->print('</tr>');
1.301     albertel 4783:     foreach my $hash (@$samples) {
1.31      albertel 4784: 	$r->print('<tr>');
1.356     albertel 4785: 	foreach my $sample (sort({$a <=> $b} keys(%{ $samples->[0] }))) {
1.31      albertel 4786: 	    $r->print('<td>');
1.356     albertel 4787: 	    if (defined($$hash{$sample})) { $r->print($$hash{$sample}); }
1.31      albertel 4788: 	    $r->print('</td>');
                   4789: 	}
                   4790: 	$r->print('</tr>');
                   4791:     }
                   4792:     $r->print('</tr></table><br />'."\n");
                   4793: }
                   4794: 
1.144     matthew  4795: ######################################################
                   4796: ######################################################
                   4797: 
1.56      matthew  4798: =pod
                   4799: 
1.112     bowersj2 4800: =item * csv_print_select_table($r,$records,$d)
1.41      ng       4801: 
                   4802: Prints a table to create associations between values and table columns.
1.144     matthew  4803: 
1.41      ng       4804: $r is an Apache Request ref,
                   4805: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1.174     matthew  4806: $d is an array of 2 element arrays (internal name, displayed name,defaultcol)
1.41      ng       4807: 
                   4808: =cut
                   4809: 
1.144     matthew  4810: ######################################################
                   4811: ######################################################
1.31      albertel 4812: sub csv_print_select_table {
                   4813:     my ($r,$records,$d) = @_;
1.301     albertel 4814:     my $i=0;
                   4815:     my $samples = &get_samples($records,1);
1.144     matthew  4816:     $r->print(&mt('Associate columns with student attributes.')."\n".
                   4817: 	     '<table border="2"><tr>'.
                   4818:               '<th>'.&mt('Attribute').'</th>'.
                   4819:               '<th>'.&mt('Column').'</th></tr>'."\n");
1.356     albertel 4820:     foreach my $array_ref (@$d) {
                   4821: 	my ($value,$display,$defaultcol)=@{ $array_ref };
1.31      albertel 4822: 	$r->print('<tr><td>'.$display.'</td>');
                   4823: 
                   4824: 	$r->print('<td><select name=f'.$i.
1.32      matthew  4825: 		  ' onchange="javascript:flip(this.form,'.$i.');">');
1.31      albertel 4826: 	$r->print('<option value="none"></option>');
1.356     albertel 4827: 	foreach my $sample (sort({$a <=> $b} keys(%{ $samples->[0] }))) {
                   4828: 	    $r->print('<option value="'.$sample.'"'.
                   4829:                       ($sample eq $defaultcol ? ' selected="selected" ' : '').
                   4830:                       '>Column '.($sample+1).'</option>');
1.31      albertel 4831: 	}
                   4832: 	$r->print('</select></td></tr>'."\n");
                   4833: 	$i++;
                   4834:     }
                   4835:     $i--;
                   4836:     return $i;
                   4837: }
1.56      matthew  4838: 
1.144     matthew  4839: ######################################################
                   4840: ######################################################
                   4841: 
1.56      matthew  4842: =pod
1.31      albertel 4843: 
1.112     bowersj2 4844: =item * csv_samples_select_table($r,$records,$d)
1.41      ng       4845: 
                   4846: Prints a table of sample values from the upload and can make associate samples to internal names.
                   4847: 
                   4848: $r is an Apache Request ref,
                   4849: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
                   4850: $d is an array of 2 element arrays (internal name, displayed name)
                   4851: 
                   4852: =cut
                   4853: 
1.144     matthew  4854: ######################################################
                   4855: ######################################################
1.31      albertel 4856: sub csv_samples_select_table {
                   4857:     my ($r,$records,$d) = @_;
                   4858:     my $i=0;
1.144     matthew  4859:     #
1.301     albertel 4860:     my $samples = &get_samples($records,3);
1.144     matthew  4861:     $r->print('<table border=2><tr><th>'.
                   4862:               &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
1.301     albertel 4863: 
                   4864:     foreach my $key (sort(keys(%{ $samples->[0] }))) {
1.144     matthew  4865: 	$r->print('<tr><td><select name="f'.$i.'"'.
1.32      matthew  4866: 		  ' onchange="javascript:flip(this.form,'.$i.');">');
1.301     albertel 4867: 	foreach my $option (@$d) {
                   4868: 	    my ($value,$display,$defaultcol)=@{ $option };
1.174     matthew  4869: 	    $r->print('<option value="'.$value.'"'.
1.253     albertel 4870:                       ($i eq $defaultcol ? ' selected="selected" ':'').'>'.
1.174     matthew  4871:                       $display.'</option>');
1.31      albertel 4872: 	}
                   4873: 	$r->print('</select></td><td>');
1.301     albertel 4874: 	foreach my $line (0..2) {
                   4875: 	    if (defined($samples->[$line]{$key})) { 
                   4876: 		$r->print($samples->[$line]{$key}."<br />\n"); 
                   4877: 	    }
                   4878: 	}
1.31      albertel 4879: 	$r->print('</td></tr>');
                   4880: 	$i++;
                   4881:     }
                   4882:     $i--;
                   4883:     return($i);
1.115     matthew  4884: }
                   4885: 
1.144     matthew  4886: ######################################################
                   4887: ######################################################
                   4888: 
1.115     matthew  4889: =pod
                   4890: 
                   4891: =item clean_excel_name($name)
                   4892: 
                   4893: Returns a replacement for $name which does not contain any illegal characters.
                   4894: 
                   4895: =cut
                   4896: 
1.144     matthew  4897: ######################################################
                   4898: ######################################################
1.115     matthew  4899: sub clean_excel_name {
                   4900:     my ($name) = @_;
                   4901:     $name =~ s/[:\*\?\/\\]//g;
                   4902:     if (length($name) > 31) {
                   4903:         $name = substr($name,0,31);
                   4904:     }
                   4905:     return $name;
1.25      albertel 4906: }
1.84      albertel 4907: 
1.85      albertel 4908: =pod
                   4909: 
1.112     bowersj2 4910: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
1.85      albertel 4911: 
                   4912: Returns either 1 or undef
                   4913: 
                   4914: 1 if the part is to be hidden, undef if it is to be shown
                   4915: 
                   4916: Arguments are:
                   4917: 
                   4918: $id the id of the part to be checked
                   4919: $symb, optional the symb of the resource to check
                   4920: $udom, optional the domain of the user to check for
                   4921: $uname, optional the username of the user to check for
                   4922: 
                   4923: =cut
1.84      albertel 4924: 
                   4925: sub check_if_partid_hidden {
                   4926:     my ($id,$symb,$udom,$uname) = @_;
1.133     albertel 4927:     my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
1.84      albertel 4928: 					 $symb,$udom,$uname);
1.141     albertel 4929:     my $truth=1;
                   4930:     #if the string starts with !, then the list is the list to show not hide
                   4931:     if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
1.84      albertel 4932:     my @hiddenlist=split(/,/,$hiddenparts);
                   4933:     foreach my $checkid (@hiddenlist) {
1.141     albertel 4934: 	if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
1.84      albertel 4935:     }
1.141     albertel 4936:     return !$truth;
1.84      albertel 4937: }
1.127     matthew  4938: 
1.138     matthew  4939: 
                   4940: ############################################################
                   4941: ############################################################
                   4942: 
                   4943: =pod
                   4944: 
1.157     matthew  4945: =back 
                   4946: 
1.138     matthew  4947: =head1 cgi-bin script and graphing routines
                   4948: 
1.157     matthew  4949: =over 4
                   4950: 
1.138     matthew  4951: =item get_cgi_id
                   4952: 
                   4953: Inputs: none
                   4954: 
                   4955: Returns an id which can be used to pass environment variables
                   4956: to various cgi-bin scripts.  These environment variables will
                   4957: be removed from the users environment after a given time by
                   4958: the routine &Apache::lonnet::transfer_profile_to_env.
                   4959: 
                   4960: =cut
                   4961: 
                   4962: ############################################################
                   4963: ############################################################
1.152     albertel 4964: my $uniq=0;
1.136     matthew  4965: sub get_cgi_id {
1.154     albertel 4966:     $uniq=($uniq+1)%100000;
1.280     albertel 4967:     return (time.'_'.$$.'_'.$uniq);
1.136     matthew  4968: }
                   4969: 
1.127     matthew  4970: ############################################################
                   4971: ############################################################
                   4972: 
                   4973: =pod
                   4974: 
1.134     matthew  4975: =item DrawBarGraph
1.127     matthew  4976: 
1.138     matthew  4977: Facilitates the plotting of data in a (stacked) bar graph.
                   4978: Puts plot definition data into the users environment in order for 
                   4979: graph.png to plot it.  Returns an <img> tag for the plot.
                   4980: The bars on the plot are labeled '1','2',...,'n'.
                   4981: 
                   4982: Inputs:
                   4983: 
                   4984: =over 4
                   4985: 
                   4986: =item $Title: string, the title of the plot
                   4987: 
                   4988: =item $xlabel: string, text describing the X-axis of the plot
                   4989: 
                   4990: =item $ylabel: string, text describing the Y-axis of the plot
                   4991: 
                   4992: =item $Max: scalar, the maximum Y value to use in the plot
                   4993: If $Max is < any data point, the graph will not be rendered.
                   4994: 
1.140     matthew  4995: =item $colors: array ref holding the colors to be used for the data sets when
1.138     matthew  4996: they are plotted.  If undefined, default values will be used.
                   4997: 
1.178     matthew  4998: =item $labels: array ref holding the labels to use on the x-axis for the bars.
                   4999: 
1.138     matthew  5000: =item @Values: An array of array references.  Each array reference holds data
                   5001: to be plotted in a stacked bar chart.
                   5002: 
1.239     matthew  5003: =item If the final element of @Values is a hash reference the key/value
                   5004: pairs will be added to the graph definition.
                   5005: 
1.138     matthew  5006: =back
                   5007: 
                   5008: Returns:
                   5009: 
                   5010: An <img> tag which references graph.png and the appropriate identifying
                   5011: information for the plot.
                   5012: 
1.127     matthew  5013: =cut
                   5014: 
                   5015: ############################################################
                   5016: ############################################################
1.134     matthew  5017: sub DrawBarGraph {
1.178     matthew  5018:     my ($Title,$xlabel,$ylabel,$Max,$colors,$labels,@Values)=@_;
1.134     matthew  5019:     #
                   5020:     if (! defined($colors)) {
                   5021:         $colors = ['#33ff00', 
                   5022:                   '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
                   5023:                   '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
                   5024:                   ]; 
                   5025:     }
1.228     matthew  5026:     my $extra_settings = {};
                   5027:     if (ref($Values[-1]) eq 'HASH') {
                   5028:         $extra_settings = pop(@Values);
                   5029:     }
1.127     matthew  5030:     #
1.136     matthew  5031:     my $identifier = &get_cgi_id();
                   5032:     my $id = 'cgi.'.$identifier;        
1.129     matthew  5033:     if (! @Values || ref($Values[0]) ne 'ARRAY') {
1.127     matthew  5034:         return '';
                   5035:     }
1.225     matthew  5036:     #
                   5037:     my @Labels;
                   5038:     if (defined($labels)) {
                   5039:         @Labels = @$labels;
                   5040:     } else {
                   5041:         for (my $i=0;$i<@{$Values[0]};$i++) {
                   5042:             push (@Labels,$i+1);
                   5043:         }
                   5044:     }
                   5045:     #
1.129     matthew  5046:     my $NumBars = scalar(@{$Values[0]});
1.225     matthew  5047:     if ($NumBars < scalar(@Labels)) { $NumBars = scalar(@Labels); }
1.129     matthew  5048:     my %ValuesHash;
                   5049:     my $NumSets=1;
                   5050:     foreach my $array (@Values) {
                   5051:         next if (! ref($array));
1.136     matthew  5052:         $ValuesHash{$id.'.data.'.$NumSets++} = 
1.132     matthew  5053:             join(',',@$array);
1.129     matthew  5054:     }
1.127     matthew  5055:     #
1.136     matthew  5056:     my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
1.225     matthew  5057:     if ($NumBars < 3) {
                   5058:         $width = 120+$NumBars*32;
1.220     matthew  5059:         $xskip = 1;
1.225     matthew  5060:         $bar_width = 30;
                   5061:     } elsif ($NumBars < 5) {
                   5062:         $width = 120+$NumBars*20;
                   5063:         $xskip = 1;
                   5064:         $bar_width = 20;
1.220     matthew  5065:     } elsif ($NumBars < 10) {
1.136     matthew  5066:         $width = 120+$NumBars*15;
                   5067:         $xskip = 1;
                   5068:         $bar_width = 15;
                   5069:     } elsif ($NumBars <= 25) {
                   5070:         $width = 120+$NumBars*11;
                   5071:         $xskip = 5;
                   5072:         $bar_width = 8;
                   5073:     } elsif ($NumBars <= 50) {
                   5074:         $width = 120+$NumBars*8;
                   5075:         $xskip = 5;
                   5076:         $bar_width = 4;
                   5077:     } else {
                   5078:         $width = 120+$NumBars*8;
                   5079:         $xskip = 5;
                   5080:         $bar_width = 4;
                   5081:     }
                   5082:     #
1.137     matthew  5083:     $Max = 1 if ($Max < 1);
                   5084:     if ( int($Max) < $Max ) {
                   5085:         $Max++;
                   5086:         $Max = int($Max);
                   5087:     }
1.127     matthew  5088:     $Title  = '' if (! defined($Title));
                   5089:     $xlabel = '' if (! defined($xlabel));
                   5090:     $ylabel = '' if (! defined($ylabel));
1.369     www      5091:     $ValuesHash{$id.'.title'}    = &escape($Title);
                   5092:     $ValuesHash{$id.'.xlabel'}   = &escape($xlabel);
                   5093:     $ValuesHash{$id.'.ylabel'}   = &escape($ylabel);
1.137     matthew  5094:     $ValuesHash{$id.'.y_max_value'} = $Max;
1.136     matthew  5095:     $ValuesHash{$id.'.NumBars'}  = $NumBars;
                   5096:     $ValuesHash{$id.'.NumSets'}  = $NumSets;
                   5097:     $ValuesHash{$id.'.PlotType'} = 'bar';
                   5098:     $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
                   5099:     $ValuesHash{$id.'.height'}   = $height;
                   5100:     $ValuesHash{$id.'.width'}    = $width;
                   5101:     $ValuesHash{$id.'.xskip'}    = $xskip;
                   5102:     $ValuesHash{$id.'.bar_width'} = $bar_width;
                   5103:     $ValuesHash{$id.'.labels'} = join(',',@Labels);
1.127     matthew  5104:     #
1.228     matthew  5105:     # Deal with other parameters
                   5106:     while (my ($key,$value) = each(%$extra_settings)) {
                   5107:         $ValuesHash{$id.'.'.$key} = $value;
                   5108:     }
                   5109:     #
1.137     matthew  5110:     &Apache::lonnet::appenv(%ValuesHash);
                   5111:     return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
                   5112: }
                   5113: 
                   5114: ############################################################
                   5115: ############################################################
                   5116: 
                   5117: =pod
                   5118: 
                   5119: =item DrawXYGraph
                   5120: 
1.138     matthew  5121: Facilitates the plotting of data in an XY graph.
                   5122: Puts plot definition data into the users environment in order for 
                   5123: graph.png to plot it.  Returns an <img> tag for the plot.
                   5124: 
                   5125: Inputs:
                   5126: 
                   5127: =over 4
                   5128: 
                   5129: =item $Title: string, the title of the plot
                   5130: 
                   5131: =item $xlabel: string, text describing the X-axis of the plot
                   5132: 
                   5133: =item $ylabel: string, text describing the Y-axis of the plot
                   5134: 
                   5135: =item $Max: scalar, the maximum Y value to use in the plot
                   5136: If $Max is < any data point, the graph will not be rendered.
                   5137: 
                   5138: =item $colors: Array ref containing the hex color codes for the data to be 
                   5139: plotted in.  If undefined, default values will be used.
                   5140: 
                   5141: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
                   5142: 
                   5143: =item $Ydata: Array ref containing Array refs.  
1.185     www      5144: Each of the contained arrays will be plotted as a separate curve.
1.138     matthew  5145: 
                   5146: =item %Values: hash indicating or overriding any default values which are 
                   5147: passed to graph.png.  
                   5148: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
                   5149: 
                   5150: =back
                   5151: 
                   5152: Returns:
                   5153: 
                   5154: An <img> tag which references graph.png and the appropriate identifying
                   5155: information for the plot.
                   5156: 
1.137     matthew  5157: =cut
                   5158: 
                   5159: ############################################################
                   5160: ############################################################
                   5161: sub DrawXYGraph {
                   5162:     my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
                   5163:     #
                   5164:     # Create the identifier for the graph
                   5165:     my $identifier = &get_cgi_id();
                   5166:     my $id = 'cgi.'.$identifier;
                   5167:     #
                   5168:     $Title  = '' if (! defined($Title));
                   5169:     $xlabel = '' if (! defined($xlabel));
                   5170:     $ylabel = '' if (! defined($ylabel));
                   5171:     my %ValuesHash = 
                   5172:         (
1.369     www      5173:          $id.'.title'  => &escape($Title),
                   5174:          $id.'.xlabel' => &escape($xlabel),
                   5175:          $id.'.ylabel' => &escape($ylabel),
1.137     matthew  5176:          $id.'.y_max_value'=> $Max,
                   5177:          $id.'.labels'     => join(',',@$Xlabels),
                   5178:          $id.'.PlotType'   => 'XY',
                   5179:          );
                   5180:     #
                   5181:     if (defined($colors) && ref($colors) eq 'ARRAY') {
                   5182:         $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
                   5183:     }
                   5184:     #
                   5185:     if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
                   5186:         return '';
                   5187:     }
                   5188:     my $NumSets=1;
1.138     matthew  5189:     foreach my $array (@{$Ydata}){
1.137     matthew  5190:         next if (! ref($array));
                   5191:         $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
                   5192:     }
1.138     matthew  5193:     $ValuesHash{$id.'.NumSets'} = $NumSets-1;
1.137     matthew  5194:     #
                   5195:     # Deal with other parameters
                   5196:     while (my ($key,$value) = each(%Values)) {
                   5197:         $ValuesHash{$id.'.'.$key} = $value;
1.127     matthew  5198:     }
                   5199:     #
1.136     matthew  5200:     &Apache::lonnet::appenv(%ValuesHash);
                   5201:     return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
                   5202: }
                   5203: 
                   5204: ############################################################
                   5205: ############################################################
                   5206: 
                   5207: =pod
                   5208: 
1.138     matthew  5209: =item DrawXYYGraph
                   5210: 
                   5211: Facilitates the plotting of data in an XY graph with two Y axes.
                   5212: Puts plot definition data into the users environment in order for 
                   5213: graph.png to plot it.  Returns an <img> tag for the plot.
                   5214: 
                   5215: Inputs:
                   5216: 
                   5217: =over 4
                   5218: 
                   5219: =item $Title: string, the title of the plot
                   5220: 
                   5221: =item $xlabel: string, text describing the X-axis of the plot
                   5222: 
                   5223: =item $ylabel: string, text describing the Y-axis of the plot
                   5224: 
                   5225: =item $colors: Array ref containing the hex color codes for the data to be 
                   5226: plotted in.  If undefined, default values will be used.
                   5227: 
                   5228: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
                   5229: 
                   5230: =item $Ydata1: The first data set
                   5231: 
                   5232: =item $Min1: The minimum value of the left Y-axis
                   5233: 
                   5234: =item $Max1: The maximum value of the left Y-axis
                   5235: 
                   5236: =item $Ydata2: The second data set
                   5237: 
                   5238: =item $Min2: The minimum value of the right Y-axis
                   5239: 
                   5240: =item $Max2: The maximum value of the left Y-axis
                   5241: 
                   5242: =item %Values: hash indicating or overriding any default values which are 
                   5243: passed to graph.png.  
                   5244: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
                   5245: 
                   5246: =back
                   5247: 
                   5248: Returns:
                   5249: 
                   5250: An <img> tag which references graph.png and the appropriate identifying
                   5251: information for the plot.
1.136     matthew  5252: 
                   5253: =cut
                   5254: 
                   5255: ############################################################
                   5256: ############################################################
1.137     matthew  5257: sub DrawXYYGraph {
                   5258:     my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
                   5259:                                         $Ydata2,$Min2,$Max2,%Values)=@_;
1.136     matthew  5260:     #
                   5261:     # Create the identifier for the graph
                   5262:     my $identifier = &get_cgi_id();
                   5263:     my $id = 'cgi.'.$identifier;
                   5264:     #
                   5265:     $Title  = '' if (! defined($Title));
                   5266:     $xlabel = '' if (! defined($xlabel));
                   5267:     $ylabel = '' if (! defined($ylabel));
                   5268:     my %ValuesHash = 
                   5269:         (
1.369     www      5270:          $id.'.title'  => &escape($Title),
                   5271:          $id.'.xlabel' => &escape($xlabel),
                   5272:          $id.'.ylabel' => &escape($ylabel),
1.136     matthew  5273:          $id.'.labels' => join(',',@$Xlabels),
                   5274:          $id.'.PlotType' => 'XY',
                   5275:          $id.'.NumSets' => 2,
1.137     matthew  5276:          $id.'.two_axes' => 1,
                   5277:          $id.'.y1_max_value' => $Max1,
                   5278:          $id.'.y1_min_value' => $Min1,
                   5279:          $id.'.y2_max_value' => $Max2,
                   5280:          $id.'.y2_min_value' => $Min2,
1.136     matthew  5281:          );
                   5282:     #
1.137     matthew  5283:     if (defined($colors) && ref($colors) eq 'ARRAY') {
                   5284:         $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
                   5285:     }
                   5286:     #
                   5287:     if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
                   5288:         ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
1.136     matthew  5289:         return '';
                   5290:     }
                   5291:     my $NumSets=1;
1.137     matthew  5292:     foreach my $array ($Ydata1,$Ydata2){
1.136     matthew  5293:         next if (! ref($array));
                   5294:         $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
1.137     matthew  5295:     }
                   5296:     #
                   5297:     # Deal with other parameters
                   5298:     while (my ($key,$value) = each(%Values)) {
                   5299:         $ValuesHash{$id.'.'.$key} = $value;
1.136     matthew  5300:     }
                   5301:     #
                   5302:     &Apache::lonnet::appenv(%ValuesHash);
1.130     albertel 5303:     return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
1.139     matthew  5304: }
                   5305: 
                   5306: ############################################################
                   5307: ############################################################
                   5308: 
                   5309: =pod
                   5310: 
1.157     matthew  5311: =back 
                   5312: 
1.139     matthew  5313: =head1 Statistics helper routines?  
                   5314: 
                   5315: Bad place for them but what the hell.
                   5316: 
1.157     matthew  5317: =over 4
                   5318: 
1.139     matthew  5319: =item &chartlink
                   5320: 
                   5321: Returns a link to the chart for a specific student.  
                   5322: 
                   5323: Inputs:
                   5324: 
                   5325: =over 4
                   5326: 
                   5327: =item $linktext: The text of the link
                   5328: 
                   5329: =item $sname: The students username
                   5330: 
                   5331: =item $sdomain: The students domain
                   5332: 
                   5333: =back
                   5334: 
1.157     matthew  5335: =back
                   5336: 
1.139     matthew  5337: =cut
                   5338: 
                   5339: ############################################################
                   5340: ############################################################
                   5341: sub chartlink {
                   5342:     my ($linktext, $sname, $sdomain) = @_;
                   5343:     my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
1.369     www      5344:         '&amp;SelectedStudent='.&escape($sname.':'.$sdomain).
1.219     albertel 5345:         '&amp;chartoutputmode='.HTML::Entities::encode('html, with all links').
1.139     matthew  5346:        '">'.$linktext.'</a>';
1.153     matthew  5347: }
                   5348: 
                   5349: #######################################################
                   5350: #######################################################
                   5351: 
                   5352: =pod
                   5353: 
                   5354: =head1 Course Environment Routines
1.157     matthew  5355: 
                   5356: =over 4
1.153     matthew  5357: 
                   5358: =item &restore_course_settings 
                   5359: 
                   5360: =item &store_course_settings
                   5361: 
                   5362: Restores/Store indicated form parameters from the course environment.
                   5363: Will not overwrite existing values of the form parameters.
                   5364: 
                   5365: Inputs: 
                   5366: a scalar describing the data (e.g. 'chart', 'problem_analysis')
                   5367: 
                   5368: a hash ref describing the data to be stored.  For example:
                   5369:    
                   5370: %Save_Parameters = ('Status' => 'scalar',
                   5371:     'chartoutputmode' => 'scalar',
                   5372:     'chartoutputdata' => 'scalar',
                   5373:     'Section' => 'array',
1.373     raeburn  5374:     'Group' => 'array',
1.153     matthew  5375:     'StudentData' => 'array',
                   5376:     'Maps' => 'array');
                   5377: 
                   5378: Returns: both routines return nothing
                   5379: 
                   5380: =cut
                   5381: 
                   5382: #######################################################
                   5383: #######################################################
                   5384: sub store_course_settings {
                   5385:     # save to the environment
                   5386:     # appenv the same items, just to be safe
1.258     albertel 5387:     my $courseid = $env{'request.course.id'};
1.300     albertel 5388:     my $udom  = $env{'user.domain'};
                   5389:     my $uname = $env{'user.name'};
1.153     matthew  5390:     my ($prefix,$Settings) = @_;
                   5391:     my %SaveHash;
                   5392:     my %AppHash;
                   5393:     while (my ($setting,$type) = each(%$Settings)) {
1.300     albertel 5394:         my $basename = join('.','internal',$courseid,$prefix,$setting);
                   5395:         my $envname = 'environment.'.$basename;
1.258     albertel 5396:         if (exists($env{'form.'.$setting})) {
1.153     matthew  5397:             # Save this value away
                   5398:             if ($type eq 'scalar' &&
1.258     albertel 5399:                 (! exists($env{$envname}) || 
                   5400:                  $env{$envname} ne $env{'form.'.$setting})) {
                   5401:                 $SaveHash{$basename} = $env{'form.'.$setting};
                   5402:                 $AppHash{$envname}   = $env{'form.'.$setting};
1.153     matthew  5403:             } elsif ($type eq 'array') {
                   5404:                 my $stored_form;
1.258     albertel 5405:                 if (ref($env{'form.'.$setting})) {
1.153     matthew  5406:                     $stored_form = join(',',
                   5407:                                         map {
1.369     www      5408:                                             &escape($_);
1.258     albertel 5409:                                         } sort(@{$env{'form.'.$setting}}));
1.153     matthew  5410:                 } else {
                   5411:                     $stored_form = 
1.369     www      5412:                         &escape($env{'form.'.$setting});
1.153     matthew  5413:                 }
                   5414:                 # Determine if the array contents are the same.
1.258     albertel 5415:                 if ($stored_form ne $env{$envname}) {
1.153     matthew  5416:                     $SaveHash{$basename} = $stored_form;
                   5417:                     $AppHash{$envname}   = $stored_form;
                   5418:                 }
                   5419:             }
                   5420:         }
                   5421:     }
                   5422:     my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
1.300     albertel 5423:                                           $udom,$uname);
1.153     matthew  5424:     if ($put_result !~ /^(ok|delayed)/) {
                   5425:         &Apache::lonnet::logthis('unable to save form parameters, '.
                   5426:                                  'got error:'.$put_result);
                   5427:     }
                   5428:     # Make sure these settings stick around in this session, too
                   5429:     &Apache::lonnet::appenv(%AppHash);
                   5430:     return;
                   5431: }
                   5432: 
                   5433: sub restore_course_settings {
1.258     albertel 5434:     my $courseid = $env{'request.course.id'};
1.153     matthew  5435:     my ($prefix,$Settings) = @_;
                   5436:     while (my ($setting,$type) = each(%$Settings)) {
1.258     albertel 5437:         next if (exists($env{'form.'.$setting}));
1.300     albertel 5438:         my $envname = 'environment.internal.'.$courseid.'.'.$prefix.
1.153     matthew  5439:             '.'.$setting;
1.258     albertel 5440:         if (exists($env{$envname})) {
1.153     matthew  5441:             if ($type eq 'scalar') {
1.258     albertel 5442:                 $env{'form.'.$setting} = $env{$envname};
1.153     matthew  5443:             } elsif ($type eq 'array') {
1.258     albertel 5444:                 $env{'form.'.$setting} = [ 
1.153     matthew  5445:                                            map { 
1.369     www      5446:                                                &unescape($_); 
1.258     albertel 5447:                                            } split(',',$env{$envname})
1.153     matthew  5448:                                            ];
                   5449:             }
                   5450:         }
                   5451:     }
1.127     matthew  5452: }
                   5453: 
                   5454: ############################################################
                   5455: ############################################################
1.154     albertel 5456: 
1.378     raeburn  5457: sub course_type {
                   5458:     my ($cid) = @_;
                   5459:     if (!defined($cid)) {
                   5460:         $cid = $env{'request.course.id'};
                   5461:     }
1.404     albertel 5462:     if (defined($env{'course.'.$cid.'.type'})) {
                   5463:         return $env{'course.'.$cid.'.type'};
1.378     raeburn  5464:     } else {
                   5465:         return 'Course';
1.377     raeburn  5466:     }
                   5467: }
1.156     albertel 5468: 
1.406     raeburn  5469: sub group_term {
                   5470:     my $crstype = &course_type();
                   5471:     my %names = (
                   5472:                   'Course' => 'group',
                   5473:                   'Group' => 'team',
                   5474:                 );
                   5475:     return $names{$crstype};
                   5476: }
                   5477: 
1.156     albertel 5478: sub icon {
                   5479:     my ($file)=@_;
1.168     albertel 5480:     my $curfext = (split(/\./,$file))[-1];
                   5481:     my $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/unknown.gif';
1.156     albertel 5482:     my $embstyle = &Apache::loncommon::fileembstyle($curfext);
1.168     albertel 5483:     if (!(!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn')) {
                   5484: 	if (-e  $Apache::lonnet::perlvar{'lonDocRoot'}.'/'.
                   5485: 	          $Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
                   5486: 	            $curfext.".gif") {
                   5487: 	    $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
                   5488: 		$curfext.".gif";
                   5489: 	}
                   5490:     }
1.249     albertel 5491:     return &lonhttpdurl($iconname);
1.154     albertel 5492: } 
1.84      albertel 5493: 
1.215     albertel 5494: sub lonhttpdurl {
                   5495:     my ($url)=@_;
                   5496:     my $lonhttpd_port=$Apache::lonnet::perlvar{'lonhttpdPort'};
                   5497:     if (!defined($lonhttpd_port)) { $lonhttpd_port='8080'; }
                   5498:     return 'http://'.$ENV{'SERVER_NAME'}.':'.$lonhttpd_port.$url;
                   5499: }
                   5500: 
1.213     albertel 5501: sub connection_aborted {
                   5502:     my ($r)=@_;
                   5503:     $r->print(" ");$r->rflush();
                   5504:     my $c = $r->connection;
                   5505:     return $c->aborted();
                   5506: }
                   5507: 
1.221     foxr     5508: #    Escapes strings that may have embedded 's that will be put into
1.222     foxr     5509: #    strings as 'strings'.
                   5510: sub escape_single {
1.221     foxr     5511:     my ($input) = @_;
1.223     albertel 5512:     $input =~ s/\\/\\\\/g;	# Escape the \'s..(must be first)>
1.221     foxr     5513:     $input =~ s/\'/\\\'/g;	# Esacpe the 's....
                   5514:     return $input;
                   5515: }
1.223     albertel 5516: 
1.222     foxr     5517: #  Same as escape_single, but escape's "'s  This 
                   5518: #  can be used for  "strings"
                   5519: sub escape_double {
                   5520:     my ($input) = @_;
                   5521:     $input =~ s/\\/\\\\/g;	# Escape the /'s..(must be first)>
                   5522:     $input =~ s/\"/\\\"/g;	# Esacpe the "s....
                   5523:     return $input;
                   5524: }
1.223     albertel 5525:  
1.222     foxr     5526: #   Escapes the last element of a full URL.
                   5527: sub escape_url {
                   5528:     my ($url)   = @_;
1.238     raeburn  5529:     my @urlslices = split(/\//, $url,-1);
1.369     www      5530:     my $lastitem = &escape(pop(@urlslices));
1.223     albertel 5531:     return join('/',@urlslices).'/'.$lastitem;
1.222     foxr     5532: }
1.41      ng       5533: =pod
                   5534: 
                   5535: =back
                   5536: 
1.112     bowersj2 5537: =cut
1.41      ng       5538: 
1.112     bowersj2 5539: 1;
                   5540: __END__;
1.41      ng       5541: 

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