1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.112 2003/08/20 18:18:45 bowersj2 Exp $
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: #
28: # YEAR=2001
29: # 2/13-12/7 Guy Albertelli
30: # 12/21 Gerd Kortemeyer
31: # 12/25,12/28 Gerd Kortemeyer
32: # YEAR=2002
33: # 1/4 Gerd Kortemeyer
34: # 6/24,7/2 H. K. Ng
35:
36: # Makes a table out of the previous attempts
37: # Inputs result_from_symbread, user, domain, course_id
38: # Reads in non-network-related .tab files
39:
40: # POD header:
41:
42: =pod
43:
44: =head1 NAME
45:
46: Apache::loncommon - pile of common routines
47:
48: =head1 SYNOPSIS
49:
50: Common routines for manipulating connections, student answers,
51: domains, common Javascript fragments, etc.
52:
53: =head1 OVERVIEW
54:
55: A collection of commonly used subroutines that don't have a natural
56: home anywhere else. This collection helps remove
57: redundancy from other modules and increase efficiency of memory usage.
58:
59: =cut
60:
61: # End of POD header
62: package Apache::loncommon;
63:
64: use strict;
65: use Apache::lonnet();
66: use GDBM_File;
67: use POSIX qw(strftime mktime);
68: use Apache::Constants qw(:common :http :methods);
69: use Apache::lonmsg();
70: use Apache::lonmenu();
71: my $readit;
72:
73: =pod
74:
75: =head1 Global Variables
76:
77: =cut
78:
79: # ----------------------------------------------- Filetypes/Languages/Copyright
80: my %language;
81: my %cprtag;
82: my %fe; my %fd;
83: my %category_extensions;
84:
85: # ---------------------------------------------- Designs
86:
87: my %designhash;
88:
89: # ---------------------------------------------- Thesaurus variables
90:
91: # FIXME: I don't think it's necessary to document these things;
92: # they're privately used - Jeremy
93:
94: =pod
95:
96: =over 4
97:
98: =item * %Keywords
99:
100: A hash used by &keyword to determine if a word is considered a keyword.
101:
102: =item * $thesaurus_db_file
103:
104: Scalar containing the full path to the thesaurus database.
105:
106: =back
107:
108: =cut
109:
110: my %Keywords;
111: my $thesaurus_db_file;
112:
113: # ----------------------------------------------------------------------- BEGIN
114:
115: # FIXME: I don't think this needs to be documented, it prepares
116: # private data structures - Jeremy
117: =pod
118:
119: =head1 General Subroutines
120:
121: =over 4
122:
123: =item * BEGIN()
124:
125: Initialize values from language.tab, copyright.tab, filetypes.tab,
126: thesaurus.tab, and filecategories.tab.
127:
128: =back
129:
130: =cut
131:
132: # ----------------------------------------------------------------------- BEGIN
133:
134: BEGIN {
135: # Variable initialization
136: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
137: #
138: unless ($readit) {
139: # ------------------------------------------------------------------- languages
140: {
141: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
142: '/language.tab');
143: if ($fh) {
144: while (<$fh>) {
145: next if /^\#/;
146: chomp;
147: my ($key,$two,$country,$three,$enc,$val)=(split(/\t/,$_));
148: $language{$key}=$val.' - '.$enc;
149: }
150: }
151: }
152: # ------------------------------------------------------------------ copyrights
153: {
154: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
155: '/copyright.tab');
156: if ($fh) {
157: while (<$fh>) {
158: next if /^\#/;
159: chomp;
160: my ($key,$val)=(split(/\s+/,$_,2));
161: $cprtag{$key}=$val;
162: }
163: }
164: }
165:
166: # -------------------------------------------------------------- domain designs
167:
168: my $filename;
169: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
170: opendir(DIR,$designdir);
171: while ($filename=readdir(DIR)) {
172: my ($domain)=($filename=~/^(\w+)\./);
173: {
174: my $fh=Apache::File->new($designdir.'/'.$filename);
175: if ($fh) {
176: while (<$fh>) {
177: next if /^\#/;
178: chomp;
179: my ($key,$val)=(split(/\=/,$_));
180: if ($val) { $designhash{$domain.'.'.$key}=$val; }
181: }
182: }
183: }
184:
185: }
186: closedir(DIR);
187:
188:
189: # ------------------------------------------------------------- file categories
190: {
191: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
192: '/filecategories.tab');
193: if ($fh) {
194: while (<$fh>) {
195: next if /^\#/;
196: chomp;
197: my ($extension,$category)=(split(/\s+/,$_,2));
198: push @{$category_extensions{lc($category)}},$extension;
199: }
200: }
201: }
202: # ------------------------------------------------------------------ file types
203: {
204: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
205: '/filetypes.tab');
206: if ($fh) {
207: while (<$fh>) {
208: next if (/^\#/);
209: chomp;
210: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
211: if ($descr ne '') {
212: $fe{$ending}=lc($emb);
213: $fd{$ending}=$descr;
214: }
215: }
216: }
217: }
218: &Apache::lonnet::logthis(
219: "<font color=yellow>INFO: Read file types</font>");
220: $readit=1;
221: } # end of unless($readit)
222:
223: }
224:
225: ###############################################################
226: ## HTML and Javascript Helper Functions ##
227: ###############################################################
228:
229: =pod
230:
231: =head1 HTML and Javascript Functions
232:
233: =over 4
234:
235: =item * browser_and_searcher_javascript ()
236:
237: X<browsing, javascript>X<searching, javascript>Returns a string
238: containing javascript with two functions, C<openbrowser> and
239: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
240: tags.
241:
242: =over 4
243:
244: =item * openbrowser(formname,elementname,only,omit) [javascript]
245:
246: inputs: formname, elementname, only, omit
247:
248: formname and elementname indicate the name of the html form and name of
249: the element that the results of the browsing selection are to be placed in.
250:
251: Specifying 'only' will restrict the browser to displaying only files
252: with the given extension. Can be a comma seperated list.
253:
254: Specifying 'omit' will restrict the browser to NOT displaying files
255: with the given extension. Can be a comma seperated list.
256:
257: =item * opensearcher(formname, elementname) [javascript]
258:
259: Inputs: formname, elementname
260:
261: formname and elementname specify the name of the html form and the name
262: of the element the selection from the search results will be placed in.
263:
264: =back
265:
266: =cut
267:
268: sub browser_and_searcher_javascript {
269: return <<END;
270: var editbrowser = null;
271: function openbrowser(formname,elementname,only,omit) {
272: var url = '/res/?';
273: if (editbrowser == null) {
274: url += 'launch=1&';
275: }
276: url += 'catalogmode=interactive&';
277: url += 'mode=edit&';
278: url += 'form=' + formname + '&';
279: if (only != null) {
280: url += 'only=' + only + '&';
281: }
282: if (omit != null) {
283: url += 'omit=' + omit + '&';
284: }
285: url += 'element=' + elementname + '';
286: var title = 'Browser';
287: var options = 'scrollbars=1,resizable=1,menubar=0';
288: options += ',width=700,height=600';
289: editbrowser = open(url,title,options,'1');
290: editbrowser.focus();
291: }
292: var editsearcher;
293: function opensearcher(formname,elementname) {
294: var url = '/adm/searchcat?';
295: if (editsearcher == null) {
296: url += 'launch=1&';
297: }
298: url += 'catalogmode=interactive&';
299: url += 'mode=edit&';
300: url += 'form=' + formname + '&';
301: url += 'element=' + elementname + '';
302: var title = 'Search';
303: var options = 'scrollbars=1,resizable=1,menubar=0';
304: options += ',width=700,height=600';
305: editsearcher = open(url,title,options,'1');
306: editsearcher.focus();
307: }
308: END
309: }
310:
311: sub studentbrowser_javascript {
312: unless (
313: (($ENV{'request.course.id'}) &&
314: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
315: || ($ENV{'request.role'}=~/^(au|dc|su)/)
316: ) { return ''; }
317: return (<<'ENDSTDBRW');
318: <script type="text/javascript" language="Javascript" >
319: var stdeditbrowser;
320: function openstdbrowser(formname,uname,udom,roleflag) {
321: var url = '/adm/pickstudent?';
322: var filter;
323: eval('filter=document.'+formname+'.'+uname+'.value;');
324: if (filter != null) {
325: if (filter != '') {
326: url += 'filter='+filter+'&';
327: }
328: }
329: url += 'form=' + formname + '&unameelement='+uname+
330: '&udomelement='+udom;
331: if (roleflag) { url+="&roles=1"; }
332: var title = 'Student_Browser';
333: var options = 'scrollbars=1,resizable=1,menubar=0';
334: options += ',width=700,height=600';
335: stdeditbrowser = open(url,title,options,'1');
336: stdeditbrowser.focus();
337: }
338: </script>
339: ENDSTDBRW
340: }
341:
342: sub selectstudent_link {
343: my ($form,$unameele,$udomele)=@_;
344: if ($ENV{'request.course.id'}) {
345: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
346: return '';
347: }
348: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
349: '","'.$udomele.'");'."'>Select User</a>";
350: }
351: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
352: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
353: '","'.$udomele.'",1);'."'>Select User</a>";
354: }
355: return '';
356: }
357:
358: sub coursebrowser_javascript {
359: return (<<'ENDSTDBRW');
360: <script type="text/javascript" language="Javascript" >
361: var stdeditbrowser;
362: function opencrsbrowser(formname,uname,udom) {
363: var url = '/adm/pickcourse?';
364: var filter;
365: if (filter != null) {
366: if (filter != '') {
367: url += 'filter='+filter+'&';
368: }
369: }
370: url += 'form=' + formname + '&cnumelement='+uname+
371: '&cdomelement='+udom;
372: var title = 'Course_Browser';
373: var options = 'scrollbars=1,resizable=1,menubar=0';
374: options += ',width=700,height=600';
375: stdeditbrowser = open(url,title,options,'1');
376: stdeditbrowser.focus();
377: }
378: </script>
379: ENDSTDBRW
380: }
381:
382: sub selectcourse_link {
383: my ($form,$unameele,$udomele)=@_;
384: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
385: '","'.$udomele.'");'."'>Select Course</a>";
386: }
387:
388: =pod
389:
390: =item * linked_select_forms(...)
391:
392: linked_select_forms returns a string containing a <script></script> block
393: and html for two <select> menus. The select menus will be linked in that
394: changing the value of the first menu will result in new values being placed
395: in the second menu. The values in the select menu will appear in alphabetical
396: order.
397:
398: linked_select_forms takes the following ordered inputs:
399:
400: =over 4
401:
402: =item * $formname, the name of the <form> tag
403:
404: =item * $middletext, the text which appears between the <select> tags
405:
406: =item * $firstdefault, the default value for the first menu
407:
408: =item * $firstselectname, the name of the first <select> tag
409:
410: =item * $secondselectname, the name of the second <select> tag
411:
412: =item * $hashref, a reference to a hash containing the data for the menus.
413:
414: =back
415:
416: Below is an example of such a hash. Only the 'text', 'default', and
417: 'select2' keys must appear as stated. keys(%menu) are the possible
418: values for the first select menu. The text that coincides with the
419: first menu value is given in $menu{$choice1}->{'text'}. The values
420: and text for the second menu are given in the hash pointed to by
421: $menu{$choice1}->{'select2'}.
422:
423: my %menu = ( A1 => { text =>"Choice A1" ,
424: default => "B3",
425: select2 => {
426: B1 => "Choice B1",
427: B2 => "Choice B2",
428: B3 => "Choice B3",
429: B4 => "Choice B4"
430: }
431: },
432: A2 => { text =>"Choice A2" ,
433: default => "C2",
434: select2 => {
435: C1 => "Choice C1",
436: C2 => "Choice C2",
437: C3 => "Choice C3"
438: }
439: },
440: A3 => { text =>"Choice A3" ,
441: default => "D6",
442: select2 => {
443: D1 => "Choice D1",
444: D2 => "Choice D2",
445: D3 => "Choice D3",
446: D4 => "Choice D4",
447: D5 => "Choice D5",
448: D6 => "Choice D6",
449: D7 => "Choice D7"
450: }
451: }
452: );
453:
454: =cut
455:
456: sub linked_select_forms {
457: my ($formname,
458: $middletext,
459: $firstdefault,
460: $firstselectname,
461: $secondselectname,
462: $hashref
463: ) = @_;
464: my $second = "document.$formname.$secondselectname";
465: my $first = "document.$formname.$firstselectname";
466: # output the javascript to do the changing
467: my $result = '';
468: $result.="<script>\n";
469: $result.="var select2data = new Object();\n";
470: $" = '","';
471: my $debug = '';
472: foreach my $s1 (sort(keys(%$hashref))) {
473: $result.="select2data.d_$s1 = new Object();\n";
474: $result.="select2data.d_$s1.def = new String('".
475: $hashref->{$s1}->{'default'}."');\n";
476: $result.="select2data.d_$s1.values = new Array(";
477: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
478: $result.="\"@s2values\");\n";
479: $result.="select2data.d_$s1.texts = new Array(";
480: my @s2texts;
481: foreach my $value (@s2values) {
482: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
483: }
484: $result.="\"@s2texts\");\n";
485: }
486: $"=' ';
487: $result.= <<"END";
488:
489: function select1_changed() {
490: // Determine new choice
491: var newvalue = "d_" + $first.value;
492: // update select2
493: var values = select2data[newvalue].values;
494: var texts = select2data[newvalue].texts;
495: var select2def = select2data[newvalue].def;
496: var i;
497: // out with the old
498: for (i = 0; i < $second.options.length; i++) {
499: $second.options[i] = null;
500: }
501: // in with the nuclear
502: for (i=0;i<values.length; i++) {
503: $second.options[i] = new Option(values[i]);
504: $second.options[i].text = texts[i];
505: if (values[i] == select2def) {
506: $second.options[i].selected = true;
507: }
508: }
509: }
510: </script>
511: END
512: # output the initial values for the selection lists
513: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
514: foreach my $value (sort(keys(%$hashref))) {
515: $result.=" <option value=\"$value\" ";
516: $result.=" selected=\"true\" " if ($value eq $firstdefault);
517: $result.=">$hashref->{$value}->{'text'}</option>\n";
518: }
519: $result .= "</select>\n";
520: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
521: $result .= $middletext;
522: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
523: my $seconddefault = $hashref->{$firstdefault}->{'default'};
524: foreach my $value (sort(keys(%select2))) {
525: $result.=" <option value=\"$value\" ";
526: $result.=" selected=\"true\" " if ($value eq $seconddefault);
527: $result.=">$select2{$value}</option>\n";
528: }
529: $result .= "</select>\n";
530: # return $debug;
531: return $result;
532: } # end of sub linked_select_forms {
533:
534: =pod
535:
536: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
537:
538: Returns a string corresponding to an HTML link to the given help
539: $topic, where $topic corresponds to the name of a .tex file in
540: /home/httpd/html/adm/help/tex, with underscores replaced by
541: spaces.
542:
543: $text will optionally be linked to the same topic, allowing you to
544: link text in addition to the graphic. If you do not want to link
545: text, but wish to specify one of the later parameters, pass an
546: empty string.
547:
548: $stayOnPage is a value that will be interpreted as a boolean. If true,
549: the link will not open a new window. If false, the link will open
550: a new window using Javascript. (Default is false.)
551:
552: $width and $height are optional numerical parameters that will
553: override the width and height of the popped up window, which may
554: be useful for certain help topics with big pictures included.
555:
556: =cut
557:
558: sub help_open_topic {
559: my ($topic, $text, $stayOnPage, $width, $height) = @_;
560: $text = "" if (not defined $text);
561: $stayOnPage = 0 if (not defined $stayOnPage);
562: if ($ENV{'browser.interface'} eq 'textual' ||
563: $ENV{'environment.remote'} eq 'off' ) {
564: $stayOnPage=1;
565: }
566: $width = 350 if (not defined $width);
567: $height = 400 if (not defined $height);
568: my $filename = $topic;
569: $filename =~ s/ /_/g;
570:
571: my $template = "";
572: my $link;
573:
574: if (!$stayOnPage)
575: {
576: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
577: }
578: else
579: {
580: $link = "/adm/help/${filename}.hlp";
581: }
582:
583: # Add the text
584: if ($text ne "")
585: {
586: $template .=
587: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
588: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
589: }
590:
591: # Add the graphic
592: $template .= <<"ENDTEMPLATE";
593: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
594: ENDTEMPLATE
595: if ($text ne '') { $template.='</td></tr></table>' };
596: return $template;
597:
598: }
599:
600: # This is a quicky function for Latex cheatsheet editing, since it
601: # appears in at least four places
602: sub helpLatexCheatsheet {
603: my $other = shift;
604: my $addOther = '';
605: if ($other) {
606: $addOther = Apache::loncommon::help_open_topic($other, shift,
607: undef, undef, 600) .
608: '</td><td>';
609: }
610: return '<table><tr><td>'.
611: $addOther .
612: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
613: undef,undef,600)
614: .'</td><td>'.
615: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
616: undef,undef,600)
617: .'</td></tr></table>';
618: }
619:
620: =pod
621:
622: =item * csv_translate($text)
623:
624: Translate $text to allow it to be output as a 'comma seperated values'
625: format.
626:
627: =back
628:
629: =cut
630:
631: sub csv_translate {
632: my $text = shift;
633: $text =~ s/\"/\"\"/g;
634: $text =~ s/\n//g;
635: return $text;
636: }
637:
638: ###############################################################
639: ## Home server <option> list generating code ##
640: ###############################################################
641:
642: =pod
643:
644: =head1 Home Server option list generating code
645:
646: =over 4
647:
648: =item * get_domains()
649:
650: Returns an array containing each of the domains listed in the hosts.tab
651: file.
652:
653: =cut
654:
655: #-------------------------------------------
656: sub get_domains {
657: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
658: my @domains;
659: my %seen;
660: foreach (sort values(%Apache::lonnet::hostdom)) {
661: push (@domains,$_) unless $seen{$_}++;
662: }
663: return @domains;
664: }
665:
666: #-------------------------------------------
667:
668: =pod
669:
670: =item * select_form($defdom,$name,%hash)
671:
672: Returns a string containing a <select name='$name' size='1'> form to
673: allow a user to select options from a hash option_name => displayed text.
674: See lonrights.pm for an example invocation and use.
675:
676: =cut
677:
678: #-------------------------------------------
679: sub select_form {
680: my ($def,$name,%hash) = @_;
681: my $selectform = "<select name=\"$name\" size=\"1\">\n";
682: foreach (sort keys %hash) {
683: $selectform.="<option value=\"$_\" ".
684: ($_ eq $def ? 'selected' : '').
685: ">".$hash{$_}."</option>\n";
686: }
687: $selectform.="</select>";
688: return $selectform;
689: }
690:
691:
692: #-------------------------------------------
693:
694: =pod
695:
696: =item * select_dom_form($defdom,$name,$includeempty)
697:
698: Returns a string containing a <select name='$name' size='1'> form to
699: allow a user to select the domain to preform an operation in.
700: See loncreateuser.pm for an example invocation and use.
701:
702: If the $includeempty flag is set, it also includes an empty choice ("no domain
703: selected");
704:
705: =cut
706:
707: #-------------------------------------------
708: sub select_dom_form {
709: my ($defdom,$name,$includeempty) = @_;
710: my @domains = get_domains();
711: if ($includeempty) { @domains=('',@domains); }
712: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
713: foreach (@domains) {
714: $selectdomain.="<option value=\"$_\" ".
715: ($_ eq $defdom ? 'selected' : '').
716: ">$_</option>\n";
717: }
718: $selectdomain.="</select>";
719: return $selectdomain;
720: }
721:
722: #-------------------------------------------
723:
724: =pod
725:
726: =item * get_library_servers($domain)
727:
728: Returns a hash which contains keys like '103l3' and values like
729: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
730: given $domain.
731:
732: =cut
733:
734: #-------------------------------------------
735: sub get_library_servers {
736: my $domain = shift;
737: my %library_servers;
738: foreach (keys(%Apache::lonnet::libserv)) {
739: if ($Apache::lonnet::hostdom{$_} eq $domain) {
740: $library_servers{$_} = $Apache::lonnet::hostname{$_};
741: }
742: }
743: return %library_servers;
744: }
745:
746: #-------------------------------------------
747:
748: =pod
749:
750: =item * home_server_option_list($domain)
751:
752: returns a string which contains an <option> list to be used in a
753: <select> form input. See loncreateuser.pm for an example.
754:
755: =cut
756:
757: #-------------------------------------------
758: sub home_server_option_list {
759: my $domain = shift;
760: my %servers = &get_library_servers($domain);
761: my $result = '';
762: foreach (sort keys(%servers)) {
763: $result.=
764: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
765: }
766: return $result;
767: }
768:
769: =pod
770:
771: =back
772:
773: =cut
774:
775: ###############################################################
776: ## Decoding User Agent ##
777: ###############################################################
778:
779: =pod
780:
781: =head1 Decoding the User Agent
782:
783: =over 4
784:
785: =item * &decode_user_agent()
786:
787: Inputs: $r
788:
789: Outputs:
790:
791: =over 4
792:
793: =item * $httpbrowser
794:
795: =item * $clientbrowser
796:
797: =item * $clientversion
798:
799: =item * $clientmathml
800:
801: =item * $clientunicode
802:
803: =item * $clientos
804:
805: =back
806:
807: =cut
808:
809: ###############################################################
810: ###############################################################
811: sub decode_user_agent {
812: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
813: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
814: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
815: my $clientbrowser='unknown';
816: my $clientversion='0';
817: my $clientmathml='';
818: my $clientunicode='0';
819: for (my $i=0;$i<=$#browsertype;$i++) {
820: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
821: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
822: $clientbrowser=$bname;
823: $httpbrowser=~/$vreg/i;
824: $clientversion=$1;
825: $clientmathml=($clientversion>=$minv);
826: $clientunicode=($clientversion>=$univ);
827: }
828: }
829: my $clientos='unknown';
830: if (($httpbrowser=~/linux/i) ||
831: ($httpbrowser=~/unix/i) ||
832: ($httpbrowser=~/ux/i) ||
833: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
834: if (($httpbrowser=~/vax/i) ||
835: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
836: if ($httpbrowser=~/next/i) { $clientos='next'; }
837: if (($httpbrowser=~/mac/i) ||
838: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
839: if ($httpbrowser=~/win/i) { $clientos='win'; }
840: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
841: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
842: $clientunicode,$clientos,);
843: }
844:
845: =pod
846:
847: =back
848:
849: =cut
850:
851: ###############################################################
852: ## Authentication changing form generation subroutines ##
853: ###############################################################
854: ##
855: ## All of the authform_xxxxxxx subroutines take their inputs in a
856: ## hash, and have reasonable default values.
857: ##
858: ## formname = the name given in the <form> tag.
859: #-------------------------------------------
860:
861: =pod
862:
863: =head1 Authentication Routines
864:
865: =over 4
866:
867: =item * authform_xxxxxx
868:
869: The authform_xxxxxx subroutines provide javascript and html forms which
870: handle some of the conveniences required for authentication forms.
871: This is not an optimal method, but it works.
872:
873: See loncreateuser.pm for invocation and use examples.
874:
875: =over 4
876:
877: =item * authform_header
878:
879: =item * authform_authorwarning
880:
881: =item * authform_nochange
882:
883: =item * authform_kerberos
884:
885: =item * authform_internal
886:
887: =item * authform_filesystem
888:
889: =back
890:
891: =cut
892:
893: #-------------------------------------------
894: sub authform_header{
895: my %in = (
896: formname => 'cu',
897: kerb_def_dom => '',
898: @_,
899: );
900: $in{'formname'} = 'document.' . $in{'formname'};
901: my $result='';
902:
903: #---------------------------------------------- Code for upper case translation
904: my $Javascript_toUpperCase;
905: unless ($in{kerb_def_dom}) {
906: $Javascript_toUpperCase =<<"END";
907: switch (choice) {
908: case 'krb': currentform.elements[choicearg].value =
909: currentform.elements[choicearg].value.toUpperCase();
910: break;
911: default:
912: }
913: END
914: } else {
915: $Javascript_toUpperCase = "";
916: }
917:
918: $result.=<<"END";
919: var current = new Object();
920: current.radiovalue = 'nochange';
921: current.argfield = null;
922:
923: function changed_radio(choice,currentform) {
924: var choicearg = choice + 'arg';
925: // If a radio button in changed, we need to change the argfield
926: if (current.radiovalue != choice) {
927: current.radiovalue = choice;
928: if (current.argfield != null) {
929: currentform.elements[current.argfield].value = '';
930: }
931: if (choice == 'nochange') {
932: current.argfield = null;
933: } else {
934: current.argfield = choicearg;
935: switch(choice) {
936: case 'krb':
937: currentform.elements[current.argfield].value =
938: "$in{'kerb_def_dom'}";
939: break;
940: default:
941: break;
942: }
943: }
944: }
945: return;
946: }
947:
948: function changed_text(choice,currentform) {
949: var choicearg = choice + 'arg';
950: if (currentform.elements[choicearg].value !='') {
951: $Javascript_toUpperCase
952: // clear old field
953: if ((current.argfield != choicearg) && (current.argfield != null)) {
954: currentform.elements[current.argfield].value = '';
955: }
956: current.argfield = choicearg;
957: }
958: set_auth_radio_buttons(choice,currentform);
959: return;
960: }
961:
962: function set_auth_radio_buttons(newvalue,currentform) {
963: var i=0;
964: while (i < currentform.login.length) {
965: if (currentform.login[i].value == newvalue) { break; }
966: i++;
967: }
968: if (i == currentform.login.length) {
969: return;
970: }
971: current.radiovalue = newvalue;
972: currentform.login[i].checked = true;
973: return;
974: }
975: END
976: return $result;
977: }
978:
979: sub authform_authorwarning{
980: my $result='';
981: $result=<<"END";
982: <i>As a general rule, only authors or co-authors should be filesystem
983: authenticated (which allows access to the server filesystem).</i>
984: END
985: return $result;
986: }
987:
988: sub authform_nochange{
989: my %in = (
990: formname => 'document.cu',
991: kerb_def_dom => 'MSU.EDU',
992: @_,
993: );
994: my $result='';
995: $result.=<<"END";
996: <input type="radio" name="login" value="nochange" checked="checked"
997: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
998: Do not change login data
999: END
1000: return $result;
1001: }
1002:
1003: sub authform_kerberos{
1004: my %in = (
1005: formname => 'document.cu',
1006: kerb_def_dom => 'MSU.EDU',
1007: kerb_def_auth => 'krb4',
1008: @_,
1009: );
1010: my $result='';
1011: my $check4;
1012: my $check5;
1013: if ($in{'kerb_def_auth'} eq 'krb5') {
1014: $check5 = " checked=\"on\"";
1015: } else {
1016: $check4 = " checked=\"on\"";
1017: }
1018: $result.=<<"END";
1019: <input type="radio" name="login" value="krb"
1020: onclick="javascript:changed_radio('krb',$in{'formname'});"
1021: onchange="javascript:changed_radio('krb',$in{'formname'});" />
1022: Kerberos authenticated with domain
1023: <input type="text" size="10" name="krbarg" value="$in{'kerb_def_dom'}"
1024: onchange="javascript:changed_text('krb',$in{'formname'});" />
1025: <input type="radio" name="krbver" value="4" $check4 />Version 4
1026: <input type="radio" name="krbver" value="5" $check5 />Version 5
1027: END
1028: return $result;
1029: }
1030:
1031: sub authform_internal{
1032: my %args = (
1033: formname => 'document.cu',
1034: kerb_def_dom => 'MSU.EDU',
1035: @_,
1036: );
1037: my $result='';
1038: $result.=<<"END";
1039: <input type="radio" name="login" value="int"
1040: onchange="javascript:changed_radio('int',$args{'formname'});"
1041: onclick="javascript:changed_radio('int',$args{'formname'});" />
1042: Internally authenticated (with initial password
1043: <input type="text" size="10" name="intarg" value=""
1044: onchange="javascript:changed_text('int',$args{'formname'});" />)
1045: END
1046: return $result;
1047: }
1048:
1049: sub authform_local{
1050: my %in = (
1051: formname => 'document.cu',
1052: kerb_def_dom => 'MSU.EDU',
1053: @_,
1054: );
1055: my $result='';
1056: $result.=<<"END";
1057: <input type="radio" name="login" value="loc"
1058: onchange="javascript:changed_radio('loc',$in{'formname'});"
1059: onclick="javascript:changed_radio('loc',$in{'formname'});" />
1060: Local Authentication with argument
1061: <input type="text" size="10" name="locarg" value=""
1062: onchange="javascript:changed_text('loc',$in{'formname'});" />
1063: END
1064: return $result;
1065: }
1066:
1067: sub authform_filesystem{
1068: my %in = (
1069: formname => 'document.cu',
1070: kerb_def_dom => 'MSU.EDU',
1071: @_,
1072: );
1073: my $result='';
1074: $result.=<<"END";
1075: <input type="radio" name="login" value="fsys"
1076: onchange="javascript:changed_radio('fsys',$in{'formname'});"
1077: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
1078: Filesystem authenticated (with initial password
1079: <input type="text" size="10" name="fsysarg" value=""
1080: onchange="javascript:changed_text('fsys',$in{'formname'});">)
1081: END
1082: return $result;
1083: }
1084:
1085: =pod
1086:
1087: =back
1088:
1089: =cut
1090:
1091: ###############################################################
1092: ## Get Authentication Defaults for Domain ##
1093: ###############################################################
1094:
1095: =pod
1096:
1097: =head1 Domains and Authentication
1098:
1099: Returns default authentication type and an associated argument as
1100: listed in file 'domain.tab'.
1101:
1102: =over 4
1103:
1104: =item * get_auth_defaults
1105:
1106: get_auth_defaults($target_domain) returns the default authentication
1107: type and an associated argument (initial password or a kerberos domain).
1108: These values are stored in lonTabs/domain.tab
1109:
1110: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1111:
1112: If target_domain is not found in domain.tab, returns nothing ('').
1113:
1114: =cut
1115:
1116: #-------------------------------------------
1117: sub get_auth_defaults {
1118: my $domain=shift;
1119: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1120: }
1121: ###############################################################
1122: ## End Get Authentication Defaults for Domain ##
1123: ###############################################################
1124:
1125: ###############################################################
1126: ## Get Kerberos Defaults for Domain ##
1127: ###############################################################
1128: ##
1129: ## Returns default kerberos version and an associated argument
1130: ## as listed in file domain.tab. If not listed, provides
1131: ## appropriate default domain and kerberos version.
1132: ##
1133: #-------------------------------------------
1134:
1135: =pod
1136:
1137: =item * get_kerberos_defaults
1138:
1139: get_kerberos_defaults($target_domain) returns the default kerberos
1140: version and domain. If not found in domain.tabs, it defaults to
1141: version 4 and the domain of the server.
1142:
1143: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1144:
1145: =cut
1146:
1147: #-------------------------------------------
1148: sub get_kerberos_defaults {
1149: my $domain=shift;
1150: my ($krbdef,$krbdefdom) =
1151: &Apache::loncommon::get_auth_defaults($domain);
1152: unless ($krbdef =~/^krb/ && $krbdefdom) {
1153: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1154: my $krbdefdom=$1;
1155: $krbdefdom=~tr/a-z/A-Z/;
1156: $krbdef = "krb4";
1157: }
1158: return ($krbdef,$krbdefdom);
1159: }
1160:
1161: =pod
1162:
1163: =back
1164:
1165: =cut
1166:
1167: ###############################################################
1168: ## Thesaurus Functions ##
1169: ###############################################################
1170:
1171: =pod
1172:
1173: =head1 Thesaurus Functions
1174:
1175: =over 4
1176:
1177: =item * initialize_keywords
1178:
1179: Initializes the package variable %Keywords if it is empty. Uses the
1180: package variable $thesaurus_db_file.
1181:
1182: =cut
1183:
1184: ###################################################
1185:
1186: sub initialize_keywords {
1187: return 1 if (scalar keys(%Keywords));
1188: # If we are here, %Keywords is empty, so fill it up
1189: # Make sure the file we need exists...
1190: if (! -e $thesaurus_db_file) {
1191: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1192: " failed because it does not exist");
1193: return 0;
1194: }
1195: # Set up the hash as a database
1196: my %thesaurus_db;
1197: if (! tie(%thesaurus_db,'GDBM_File',
1198: $thesaurus_db_file,&GDBM_READER(),0640)){
1199: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1200: $thesaurus_db_file);
1201: return 0;
1202: }
1203: # Get the average number of appearances of a word.
1204: my $avecount = $thesaurus_db{'average.count'};
1205: # Put keywords (those that appear > average) into %Keywords
1206: while (my ($word,$data)=each (%thesaurus_db)) {
1207: my ($count,undef) = split /:/,$data;
1208: $Keywords{$word}++ if ($count > $avecount);
1209: }
1210: untie %thesaurus_db;
1211: # Remove special values from %Keywords.
1212: foreach ('total.count','average.count') {
1213: delete($Keywords{$_}) if (exists($Keywords{$_}));
1214: }
1215: return 1;
1216: }
1217:
1218: ###################################################
1219:
1220: =pod
1221:
1222: =item * keyword($word)
1223:
1224: Returns true if $word is a keyword. A keyword is a word that appears more
1225: than the average number of times in the thesaurus database. Calls
1226: &initialize_keywords
1227:
1228: =cut
1229:
1230: ###################################################
1231:
1232: sub keyword {
1233: return if (!&initialize_keywords());
1234: my $word=lc(shift());
1235: $word=~s/\W//g;
1236: return exists($Keywords{$word});
1237: }
1238:
1239: ###############################################################
1240:
1241: =pod
1242:
1243: =item * get_related_words
1244:
1245: Look up a word in the thesaurus. Takes a scalar arguement and returns
1246: an array of words. If the keyword is not in the thesaurus, an empty array
1247: will be returned. The order of the words returned is determined by the
1248: database which holds them.
1249:
1250: Uses global $thesaurus_db_file.
1251:
1252: =cut
1253:
1254: ###############################################################
1255: sub get_related_words {
1256: my $keyword = shift;
1257: my %thesaurus_db;
1258: if (! -e $thesaurus_db_file) {
1259: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1260: "failed because the file does not exist");
1261: return ();
1262: }
1263: if (! tie(%thesaurus_db,'GDBM_File',
1264: $thesaurus_db_file,&GDBM_READER(),0640)){
1265: return ();
1266: }
1267: my @Words=();
1268: if (exists($thesaurus_db{$keyword})) {
1269: $_ = $thesaurus_db{$keyword};
1270: (undef,@Words) = split/:/; # The first element is the number of times
1271: # the word appears. We do not need it now.
1272: for (my $i=0;$i<=$#Words;$i++) {
1273: ($Words[$i],undef)= split/\,/,$Words[$i];
1274: }
1275: }
1276: untie %thesaurus_db;
1277: return @Words;
1278: }
1279:
1280: =pod
1281:
1282: =back
1283:
1284: =cut
1285:
1286: # -------------------------------------------------------------- Plaintext name
1287: =pod
1288:
1289: =head1 User Name Functions
1290:
1291: =over 4
1292:
1293: =item * plainname($uname,$udom)
1294:
1295: Takes a users logon name and returns it as a string in
1296: "first middle last generation" form
1297:
1298: =cut
1299:
1300: ###############################################################
1301: sub plainname {
1302: my ($uname,$udom)=@_;
1303: my %names=&Apache::lonnet::get('environment',
1304: ['firstname','middlename','lastname','generation'],
1305: $udom,$uname);
1306: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1307: $names{'lastname'}.' '.$names{'generation'};
1308: $name=~s/\s+$//;
1309: $name=~s/\s+/ /g;
1310: return $name;
1311: }
1312:
1313: # -------------------------------------------------------------------- Nickname
1314: =pod
1315:
1316: =item * nickname($uname,$udom)
1317:
1318: Gets a users name and returns it as a string as
1319:
1320: ""nickname""
1321:
1322: if the user has a nickname or
1323:
1324: "first middle last generation"
1325:
1326: if the user does not
1327:
1328: =cut
1329:
1330: sub nickname {
1331: my ($uname,$udom)=@_;
1332: my %names=&Apache::lonnet::get('environment',
1333: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1334: my $name=$names{'nickname'};
1335: if ($name) {
1336: $name='"'.$name.'"';
1337: } else {
1338: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1339: $names{'lastname'}.' '.$names{'generation'};
1340: $name=~s/\s+$//;
1341: $name=~s/\s+/ /g;
1342: }
1343: return $name;
1344: }
1345:
1346:
1347: # ------------------------------------------------------------------ Screenname
1348:
1349: =pod
1350:
1351: =item * screenname($uname,$udom)
1352:
1353: Gets a users screenname and returns it as a string
1354:
1355: =cut
1356:
1357: sub screenname {
1358: my ($uname,$udom)=@_;
1359: my %names=
1360: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1361: return $names{'screenname'};
1362: }
1363:
1364: # ------------------------------------------------------------- Message Wrapper
1365:
1366: sub messagewrapper {
1367: my ($link,$un,$do)=@_;
1368: return
1369: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1370: }
1371: # --------------------------------------------------------------- Notes Wrapper
1372:
1373: sub noteswrapper {
1374: my ($link,$un,$do)=@_;
1375: return
1376: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1377: }
1378: # ------------------------------------------------------------- Aboutme Wrapper
1379:
1380: sub aboutmewrapper {
1381: my ($link,$username,$domain)=@_;
1382: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1383: }
1384:
1385: # ------------------------------------------------------------ Syllabus Wrapper
1386:
1387:
1388: sub syllabuswrapper {
1389: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1390: if ($fontcolor) {
1391: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1392: }
1393: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1394: }
1395:
1396: =pod
1397:
1398: =back
1399:
1400: =head1 Access .tab File Data
1401:
1402: =over 4
1403:
1404: =item * languageids()
1405:
1406: returns list of all language ids
1407:
1408: =cut
1409:
1410: sub languageids {
1411: return sort(keys(%language));
1412: }
1413:
1414: =pod
1415:
1416: =item * languagedescription()
1417:
1418: returns description of a specified language id
1419:
1420: =cut
1421:
1422: sub languagedescription {
1423: return $language{shift(@_)};
1424: }
1425:
1426: =pod
1427:
1428: =item * copyrightids()
1429:
1430: returns list of all copyrights
1431:
1432: =cut
1433:
1434: sub copyrightids {
1435: return sort(keys(%cprtag));
1436: }
1437:
1438: =pod
1439:
1440: =item * copyrightdescription()
1441:
1442: returns description of a specified copyright id
1443:
1444: =cut
1445:
1446: sub copyrightdescription {
1447: return $cprtag{shift(@_)};
1448: }
1449:
1450: =pod
1451:
1452: =item * filecategories()
1453:
1454: returns list of all file categories
1455:
1456: =cut
1457:
1458: sub filecategories {
1459: return sort(keys(%category_extensions));
1460: }
1461:
1462: =pod
1463:
1464: =item * filecategorytypes()
1465:
1466: returns list of file types belonging to a given file
1467: category
1468:
1469: =cut
1470:
1471: sub filecategorytypes {
1472: return @{$category_extensions{lc($_[0])}};
1473: }
1474:
1475: =pod
1476:
1477: =item * fileembstyle()
1478:
1479: returns embedding style for a specified file type
1480:
1481: =cut
1482:
1483: sub fileembstyle {
1484: return $fe{lc(shift(@_))};
1485: }
1486:
1487: =pod
1488:
1489: =item * filedescription()
1490:
1491: returns description for a specified file type
1492:
1493: =cut
1494:
1495: sub filedescription {
1496: return $fd{lc(shift(@_))};
1497: }
1498:
1499: =pod
1500:
1501: =item * filedescriptionex()
1502:
1503: returns description for a specified file type with
1504: extra formatting
1505:
1506: =cut
1507:
1508: sub filedescriptionex {
1509: my $ex=shift;
1510: return '.'.$ex.' '.$fd{lc($ex)};
1511: }
1512:
1513: # End of .tab access
1514: =pod
1515:
1516: =back
1517:
1518: =cut
1519:
1520: # ------------------------------------------------------------------ File Types
1521: sub fileextensions {
1522: return sort(keys(%fe));
1523: }
1524:
1525: # ----------------------------------------------------------- Display Languages
1526: # returns a hash with all desired display languages
1527: #
1528:
1529: sub display_languages {
1530: my %languages=();
1531: if ($ENV{'environment.languages'}) {
1532: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'})) {
1533: $languages{$_}=1;
1534: }
1535: }
1536: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1537: foreach (split(/\s*(\,|\;|\:)\s*/,
1538: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'})) {
1539: $languages{$_}=1;
1540: }
1541: }
1542: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1543: if ($ENV{'form.displaylanguage'}) {
1544: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1545: $languages{$_}=1;
1546: }
1547: }
1548: return %languages;
1549: }
1550:
1551: ###############################################################
1552: ## Student Answer Attempts ##
1553: ###############################################################
1554:
1555: =pod
1556:
1557: =head1 Alternate Problem Views
1558:
1559: =over 4
1560:
1561: =item * get_previous_attempt($symb, $username, $domain, $course,
1562: $getattempt, $regexp, $gradesub)
1563:
1564: Return string with previous attempt on problem. Arguments:
1565:
1566: =over 4
1567:
1568: =item * $symb: Problem, including path
1569:
1570: =item * $username: username of the desired student
1571:
1572: =item * $domain: domain of the desired student
1573:
1574: =item * $course: Course ID
1575:
1576: =item * $getattempt: Leave blank for all attempts, otherwise put
1577: something
1578:
1579: =item * $regexp: if string matches this regexp, the string will be
1580: sent to $gradesub
1581:
1582: =item * $gradesub: routine that processes the string if it matches $regexp
1583:
1584: =back
1585:
1586: The output string is a table containing all desired attempts, if any.
1587:
1588: =cut
1589:
1590: sub get_previous_attempt {
1591: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1592: my $prevattempts='';
1593: no strict 'refs';
1594: if ($symb) {
1595: my (%returnhash)=
1596: &Apache::lonnet::restore($symb,$course,$domain,$username);
1597: if ($returnhash{'version'}) {
1598: my %lasthash=();
1599: my $version;
1600: for ($version=1;$version<=$returnhash{'version'};$version++) {
1601: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1602: $lasthash{$_}=$returnhash{$version.':'.$_};
1603: }
1604: }
1605: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1606: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1607: foreach (sort(keys %lasthash)) {
1608: my ($ign,@parts) = split(/\./,$_);
1609: if ($#parts > 0) {
1610: my $data=$parts[-1];
1611: pop(@parts);
1612: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1613: } else {
1614: if ($#parts == 0) {
1615: $prevattempts.='<th>'.$parts[0].'</th>';
1616: } else {
1617: $prevattempts.='<th>'.$ign.'</th>';
1618: }
1619: }
1620: }
1621: if ($getattempt eq '') {
1622: for ($version=1;$version<=$returnhash{'version'};$version++) {
1623: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1624: foreach (sort(keys %lasthash)) {
1625: my $value;
1626: if ($_ =~ /timestamp/) {
1627: $value=scalar(localtime($returnhash{$version.':'.$_}));
1628: } else {
1629: $value=$returnhash{$version.':'.$_};
1630: }
1631: $prevattempts.='<td>'.$value.' </td>';
1632: }
1633: }
1634: }
1635: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1636: foreach (sort(keys %lasthash)) {
1637: my $value;
1638: if ($_ =~ /timestamp/) {
1639: $value=scalar(localtime($lasthash{$_}));
1640: } else {
1641: $value=$lasthash{$_};
1642: }
1643: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1644: $prevattempts.='<td>'.$value.' </td>';
1645: }
1646: $prevattempts.='</tr></table></td></tr></table>';
1647: } else {
1648: $prevattempts='Nothing submitted - no attempts.';
1649: }
1650: } else {
1651: $prevattempts='No data.';
1652: }
1653: }
1654:
1655: sub relative_to_absolute {
1656: my ($url,$output)=@_;
1657: my $parser=HTML::TokeParser->new(\$output);
1658: my $token;
1659: my $thisdir=$url;
1660: my @rlinks=();
1661: while ($token=$parser->get_token) {
1662: if ($token->[0] eq 'S') {
1663: if ($token->[1] eq 'a') {
1664: if ($token->[2]->{'href'}) {
1665: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1666: }
1667: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1668: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1669: } elsif ($token->[1] eq 'base') {
1670: $thisdir=$token->[2]->{'href'};
1671: }
1672: }
1673: }
1674: $thisdir=~s-/[^/]*$--;
1675: foreach (@rlinks) {
1676: unless (($_=~/^http:\/\//i) ||
1677: ($_=~/^\//) ||
1678: ($_=~/^javascript:/i) ||
1679: ($_=~/^mailto:/i) ||
1680: ($_=~/^\#/)) {
1681: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1682: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1683: }
1684: }
1685: # -------------------------------------------------- Deal with Applet codebases
1686: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1687: return $output;
1688: }
1689:
1690: =pod
1691:
1692: =item * get_student_view
1693:
1694: show a snapshot of what student was looking at
1695:
1696: =cut
1697:
1698: sub get_student_view {
1699: my ($symb,$username,$domain,$courseid,$target) = @_;
1700: my ($map,$id,$feedurl) = split(/___/,$symb);
1701: my (%old,%moreenv);
1702: my @elements=('symb','courseid','domain','username');
1703: foreach my $element (@elements) {
1704: $old{$element}=$ENV{'form.grade_'.$element};
1705: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1706: }
1707: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1708: &Apache::lonnet::appenv(%moreenv);
1709: $feedurl=&Apache::lonnet::clutter($feedurl);
1710: my $userview=&Apache::lonnet::ssi_body($feedurl);
1711: &Apache::lonnet::delenv('form.grade_');
1712: foreach my $element (@elements) {
1713: $ENV{'form.grade_'.$element}=$old{$element};
1714: }
1715: $userview=~s/\<body[^\>]*\>//gi;
1716: $userview=~s/\<\/body\>//gi;
1717: $userview=~s/\<html\>//gi;
1718: $userview=~s/\<\/html\>//gi;
1719: $userview=~s/\<head\>//gi;
1720: $userview=~s/\<\/head\>//gi;
1721: $userview=~s/action\s*\=/would_be_action\=/gi;
1722: $userview=&relative_to_absolute($feedurl,$userview);
1723: return $userview;
1724: }
1725:
1726: =pod
1727:
1728: =item * get_student_answers()
1729:
1730: show a snapshot of how student was answering problem
1731:
1732: =cut
1733:
1734: sub get_student_answers {
1735: my ($symb,$username,$domain,$courseid,%form) = @_;
1736: my ($map,$id,$feedurl) = split(/___/,$symb);
1737: my (%old,%moreenv);
1738: my @elements=('symb','courseid','domain','username');
1739: foreach my $element (@elements) {
1740: $old{$element}=$ENV{'form.grade_'.$element};
1741: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1742: }
1743: $moreenv{'form.grade_target'}='answer';
1744: &Apache::lonnet::appenv(%moreenv);
1745: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1746: &Apache::lonnet::delenv('form.grade_');
1747: foreach my $element (@elements) {
1748: $ENV{'form.grade_'.$element}=$old{$element};
1749: }
1750: return $userview;
1751: }
1752:
1753: =pod
1754:
1755: =back
1756:
1757: =cut
1758:
1759: ###############################################
1760:
1761:
1762: sub timehash {
1763: my @ltime=localtime(shift);
1764: return ( 'seconds' => $ltime[0],
1765: 'minutes' => $ltime[1],
1766: 'hours' => $ltime[2],
1767: 'day' => $ltime[3],
1768: 'month' => $ltime[4]+1,
1769: 'year' => $ltime[5]+1900,
1770: 'weekday' => $ltime[6],
1771: 'dayyear' => $ltime[7]+1,
1772: 'dlsav' => $ltime[8] );
1773: }
1774:
1775: sub maketime {
1776: my %th=@_;
1777: return POSIX::mktime(
1778: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1779: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1780: }
1781:
1782:
1783: #########################################
1784: #
1785: # Retro-fixing of un-backward-compatible time format
1786:
1787: sub unsqltime {
1788: my $timestamp=shift;
1789: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1790: $timestamp=&maketime(
1791: 'year'=>$1,'month'=>$2,'day'=>$3,
1792: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1793: }
1794: return $timestamp;
1795: }
1796:
1797: #########################################
1798:
1799: sub findallcourses {
1800: my %courses=();
1801: my $now=time;
1802: foreach (keys %ENV) {
1803: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1804: my ($starttime,$endtime)=$ENV{$_};
1805: my $active=1;
1806: if ($starttime) {
1807: if ($now<$starttime) { $active=0; }
1808: }
1809: if ($endtime) {
1810: if ($now>$endtime) { $active=0; }
1811: }
1812: if ($active) { $courses{$1.'_'.$2}=1; }
1813: }
1814: }
1815: return keys %courses;
1816: }
1817:
1818: ###############################################
1819: ###############################################
1820:
1821: =pod
1822:
1823: =head1 Domain Template Functions
1824:
1825: =over 4
1826:
1827: =item * &determinedomain()
1828:
1829: Inputs: $domain (usually will be undef)
1830:
1831: Returns: Determines which domain should be used for designs
1832:
1833: =cut
1834:
1835: ###############################################
1836: sub determinedomain {
1837: my $domain=shift;
1838: if (! $domain) {
1839: # Determine domain if we have not been given one
1840: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1841: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1842: if ($ENV{'request.role.domain'}) {
1843: $domain=$ENV{'request.role.domain'};
1844: }
1845: }
1846: return $domain;
1847: }
1848: ###############################################
1849: =pod
1850:
1851: =item * &domainlogo()
1852:
1853: Inputs: $domain (usually will be undef)
1854:
1855: Returns: A link to a domain logo, if the domain logo exists.
1856: If the domain logo does not exist, a description of the domain.
1857:
1858: =cut
1859:
1860: ###############################################
1861: sub domainlogo {
1862: my $domain = &determinedomain(shift);
1863: # See if there is a logo
1864: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1865: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
1866: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1867: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
1868: '/adm/lonDomLogos/'.$domain.'.gif" />';
1869: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1870: return $Apache::lonnet::domaindescription{$domain};
1871: } else {
1872: return '';
1873: }
1874: }
1875: ##############################################
1876:
1877: =pod
1878:
1879: =item * &designparm()
1880:
1881: Inputs: $which parameter; $domain (usually will be undef)
1882:
1883: Returns: value of designparamter $which
1884:
1885: =cut
1886:
1887: ##############################################
1888: sub designparm {
1889: my ($which,$domain)=@_;
1890: if ($ENV{'browser.blackwhite'} eq 'on') {
1891: if ($which=~/\.(font|alink|vlink|link)$/) {
1892: return '#000000';
1893: }
1894: if ($which=~/\.(pgbg|sidebg)$/) {
1895: return '#FFFFFF';
1896: }
1897: if ($which=~/\.tabbg$/) {
1898: return '#CCCCCC';
1899: }
1900: }
1901: if ($ENV{'environment.color.'.$which}) {
1902: return $ENV{'environment.color.'.$which};
1903: }
1904: $domain=&determinedomain($domain);
1905: if ($designhash{$domain.'.'.$which}) {
1906: return $designhash{$domain.'.'.$which};
1907: } else {
1908: return $designhash{'default.'.$which};
1909: }
1910: }
1911:
1912: ###############################################
1913: ###############################################
1914:
1915: =pod
1916:
1917: =back
1918:
1919: =head1 HTTP Helpers
1920:
1921: =over 4
1922:
1923: =item * &bodytag()
1924:
1925: Returns a uniform header for LON-CAPA web pages.
1926:
1927: Inputs:
1928:
1929: =over 4
1930:
1931: =item * $title, A title to be displayed on the page.
1932:
1933: =item * $function, the current role (can be undef).
1934:
1935: =item * $addentries, extra parameters for the <body> tag.
1936:
1937: =item * $bodyonly, if defined, only return the <body> tag.
1938:
1939: =item * $domain, if defined, force a given domain.
1940:
1941: =item * $forcereg, if page should register as content page (relevant for
1942: text interface only)
1943:
1944: =back
1945:
1946: Returns: A uniform header for LON-CAPA web pages.
1947: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
1948: If $bodyonly is undef or zero, an html string containing a <body> tag and
1949: other decorations will be returned.
1950:
1951: =cut
1952:
1953: sub bodytag {
1954: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
1955: unless ($function) {
1956: $function='student';
1957: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
1958: $function='coordinator';
1959: }
1960: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
1961: $function='admin';
1962: }
1963: if (($ENV{'request.role'}=~/^(au|ca)/) ||
1964: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
1965: $function='author';
1966: }
1967: }
1968: my $img=&designparm($function.'.img',$domain);
1969: my $pgbg=&designparm($function.'.pgbg',$domain);
1970: my $tabbg=&designparm($function.'.tabbg',$domain);
1971: my $font=&designparm($function.'.font',$domain);
1972: my $link=&designparm($function.'.link',$domain);
1973: my $alink=&designparm($function.'.alink',$domain);
1974: my $vlink=&designparm($function.'.vlink',$domain);
1975: my $sidebg=&designparm($function.'.sidebg',$domain);
1976: # Accessibility font enhance
1977: unless ($addentries) { $addentries=''; }
1978: if ($ENV{'browser.fontenhance'} eq 'on') {
1979: $addentries.=' style="font-size: x-large"';
1980: }
1981: # role and realm
1982: my ($role,$realm)
1983: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
1984: # realm
1985: if ($ENV{'request.course.id'}) {
1986: $realm=
1987: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1988: }
1989: unless ($realm) { $realm=' '; }
1990: # Set messages
1991: my $messages=&domainlogo($domain);
1992: # Port for miniserver
1993: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
1994: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1995: # construct main body tag
1996: my $bodytag = <<END;
1997: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
1998: $addentries>
1999: END
2000: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2001: $lonhttpdPort.$img.'" />';
2002: if ($bodyonly) {
2003: return $bodytag;
2004: } elsif ($ENV{'browser.interface'} eq 'textual') {
2005: # Accessibility
2006: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2007: $forcereg).
2008: '<h1>LON-CAPA: '.$title.'</h1>';
2009: } elsif ($ENV{'environment.remote'} eq 'off') {
2010: # No Remote
2011: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2012: $forcereg).
2013: '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font size="+3" color="'.$font.'"><b>'.$title.
2014: '</b></font></td></tr></table>';
2015: }
2016:
2017: #
2018: # Top frame rendering, Remote is up
2019: #
2020: return(<<ENDBODY);
2021: $bodytag
2022: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2023: <tr><td bgcolor="$sidebg">
2024: $upperleft</td>
2025: <td bgcolor="$sidebg" align="right">$messages </td>
2026: </tr>
2027: <tr>
2028: <td rowspan="3" bgcolor="$tabbg">
2029: <font size="5"><b>$title</b></font>
2030: <td bgcolor="$tabbg" align="right">
2031: <font size="2">
2032: $ENV{'environment.firstname'}
2033: $ENV{'environment.middlename'}
2034: $ENV{'environment.lastname'}
2035: $ENV{'environment.generation'}
2036: </font>
2037: </td>
2038: </tr>
2039: <tr><td bgcolor="$tabbg" align="right">
2040: <font size="2">$role</font>
2041: </td></tr>
2042: <tr>
2043: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
2044: </table><br>
2045: ENDBODY
2046: }
2047:
2048: ###############################################
2049:
2050: sub get_posted_cgi {
2051: my $r=shift;
2052:
2053: my $buffer;
2054:
2055: $r->read($buffer,$r->header_in('Content-length'),0);
2056: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2057: my @pairs=split(/&/,$buffer);
2058: my $pair;
2059: foreach $pair (@pairs) {
2060: my ($name,$value) = split(/=/,$pair);
2061: $value =~ tr/+/ /;
2062: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2063: $name =~ tr/+/ /;
2064: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2065: &add_to_env("form.$name",$value);
2066: }
2067: } else {
2068: my $contentsep=$1;
2069: my @lines = split (/\n/,$buffer);
2070: my $name='';
2071: my $value='';
2072: my $fname='';
2073: my $fmime='';
2074: my $i;
2075: for ($i=0;$i<=$#lines;$i++) {
2076: if ($lines[$i]=~/^$contentsep/) {
2077: if ($name) {
2078: chomp($value);
2079: if ($fname) {
2080: $ENV{"form.$name.filename"}=$fname;
2081: $ENV{"form.$name.mimetype"}=$fmime;
2082: } else {
2083: $value=~s/\s+$//s;
2084: }
2085: &add_to_env("form.$name",$value);
2086: }
2087: if ($i<$#lines) {
2088: $i++;
2089: $lines[$i]=~
2090: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2091: $name=$1;
2092: $value='';
2093: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2094: $fname=$1;
2095: if
2096: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2097: $fmime=$1;
2098: $i++;
2099: } else {
2100: $fmime='';
2101: }
2102: } else {
2103: $fname='';
2104: $fmime='';
2105: }
2106: $i++;
2107: }
2108: } else {
2109: $value.=$lines[$i]."\n";
2110: }
2111: }
2112: }
2113: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2114: $r->method_number(M_GET);
2115: $r->method('GET');
2116: $r->headers_in->unset('Content-length');
2117: }
2118:
2119: =pod
2120:
2121: =item * get_unprocessed_cgi($query,$possible_names)
2122:
2123: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2124: $query. The parameters listed in $possible_names (an array reference),
2125: will be set in $ENV{'form.name'} if they do not already exist.
2126:
2127: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2128: $possible_names is an ref to an array of form element names. As an example:
2129: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2130: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2131:
2132: =cut
2133:
2134: sub get_unprocessed_cgi {
2135: my ($query,$possible_names)= @_;
2136: # $Apache::lonxml::debug=1;
2137: foreach (split(/&/,$query)) {
2138: my ($name, $value) = split(/=/,$_);
2139: $name = &Apache::lonnet::unescape($name);
2140: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2141: $value =~ tr/+/ /;
2142: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2143: &Apache::lonxml::debug("Seting :$name: to :$value:");
2144: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2145: }
2146: }
2147: }
2148:
2149: =pod
2150:
2151: =item * cacheheader()
2152:
2153: returns cache-controlling header code
2154:
2155: =cut
2156:
2157: sub cacheheader {
2158: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2159: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2160: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2161: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2162: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2163: return $output;
2164: }
2165:
2166: =pod
2167:
2168: =item * no_cache($r)
2169:
2170: specifies header code to not have cache
2171:
2172: =cut
2173:
2174: sub no_cache {
2175: my ($r) = @_;
2176: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2177: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2178: $r->no_cache(1);
2179: $r->header_out("Pragma" => "no-cache");
2180: #$r->header_out("Expires" => $date);
2181: }
2182:
2183: =pod
2184:
2185: =item * add_to_env($name,$value)
2186:
2187: adds $name to the %ENV hash with value
2188: $value, if $name already exists, the entry is converted to an array
2189: reference and $value is added to the array.
2190:
2191: =cut
2192:
2193: sub add_to_env {
2194: my ($name,$value)=@_;
2195: if (defined($ENV{$name})) {
2196: if (ref($ENV{$name})) {
2197: #already have multiple values
2198: push(@{ $ENV{$name} },$value);
2199: } else {
2200: #first time seeing multiple values, convert hash entry to an arrayref
2201: my $first=$ENV{$name};
2202: undef($ENV{$name});
2203: push(@{ $ENV{$name} },$first,$value);
2204: }
2205: } else {
2206: $ENV{$name}=$value;
2207: }
2208: }
2209:
2210: =pod
2211:
2212: =back
2213:
2214: =head1 CSV Upload/Handling functions
2215:
2216: =over 4
2217:
2218: =item * upfile_store($r)
2219:
2220: Store uploaded file, $r should be the HTTP Request object,
2221: needs $ENV{'form.upfile'}
2222: returns $datatoken to be put into hidden field
2223:
2224: =cut
2225:
2226: sub upfile_store {
2227: my $r=shift;
2228: $ENV{'form.upfile'}=~s/\r/\n/gs;
2229: $ENV{'form.upfile'}=~s/\f/\n/gs;
2230: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2231: $ENV{'form.upfile'}=~s/\n+$//gs;
2232:
2233: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2234: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2235: {
2236: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
2237: '/tmp/'.$datatoken.'.tmp');
2238: print $fh $ENV{'form.upfile'};
2239: }
2240: return $datatoken;
2241: }
2242:
2243: =pod
2244:
2245: =item * load_tmp_file($r)
2246:
2247: Load uploaded file from tmp, $r should be the HTTP Request object,
2248: needs $ENV{'form.datatoken'},
2249: sets $ENV{'form.upfile'} to the contents of the file
2250:
2251: =cut
2252:
2253: sub load_tmp_file {
2254: my $r=shift;
2255: my @studentdata=();
2256: {
2257: my $fh;
2258: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
2259: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
2260: @studentdata=<$fh>;
2261: }
2262: }
2263: $ENV{'form.upfile'}=join('',@studentdata);
2264: }
2265:
2266: =pod
2267:
2268: =item * upfile_record_sep()
2269:
2270: Separate uploaded file into records
2271: returns array of records,
2272: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2273:
2274: =cut
2275:
2276: sub upfile_record_sep {
2277: if ($ENV{'form.upfiletype'} eq 'xml') {
2278: } else {
2279: return split(/\n/,$ENV{'form.upfile'});
2280: }
2281: }
2282:
2283: =pod
2284:
2285: =item * record_sep($record)
2286:
2287: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2288:
2289: =cut
2290:
2291: sub record_sep {
2292: my $record=shift;
2293: my %components=();
2294: if ($ENV{'form.upfiletype'} eq 'xml') {
2295: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2296: my $i=0;
2297: foreach (split(/\s+/,$record)) {
2298: my $field=$_;
2299: $field=~s/^(\"|\')//;
2300: $field=~s/(\"|\')$//;
2301: $components{$i}=$field;
2302: $i++;
2303: }
2304: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2305: my $i=0;
2306: foreach (split(/\t+/,$record)) {
2307: my $field=$_;
2308: $field=~s/^(\"|\')//;
2309: $field=~s/(\"|\')$//;
2310: $components{$i}=$field;
2311: $i++;
2312: }
2313: } else {
2314: my @allfields=split(/\,/,$record);
2315: my $i=0;
2316: my $j;
2317: for ($j=0;$j<=$#allfields;$j++) {
2318: my $field=$allfields[$j];
2319: if ($field=~/^\s*(\"|\')/) {
2320: my $delimiter=$1;
2321: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2322: $j++;
2323: $field.=','.$allfields[$j];
2324: }
2325: $field=~s/^\s*$delimiter//;
2326: $field=~s/$delimiter\s*$//;
2327: }
2328: $components{$i}=$field;
2329: $i++;
2330: }
2331: }
2332: return %components;
2333: }
2334:
2335: =pod
2336:
2337: =item * upfile_select_html()
2338:
2339: return HTML code to select file and specify its type
2340:
2341: =cut
2342:
2343: sub upfile_select_html {
2344: return (<<'ENDUPFORM');
2345: <input type="file" name="upfile" size="50" />
2346: <br />Type: <select name="upfiletype">
2347: <option value="csv">CSV (comma separated values, spreadsheet)</option>
2348: <option value="space">Space separated</option>
2349: <option value="tab">Tabulator separated</option>
2350: <option value="xml">HTML/XML</option>
2351: </select>
2352: ENDUPFORM
2353: }
2354:
2355: =pod
2356:
2357: =item * csv_print_samples($r,$records)
2358:
2359: Prints a table of sample values from each column uploaded $r is an
2360: Apache Request ref, $records is an arrayref from
2361: &Apache::loncommon::upfile_record_sep
2362:
2363: =cut
2364:
2365: sub csv_print_samples {
2366: my ($r,$records) = @_;
2367: my (%sone,%stwo,%sthree);
2368: %sone=&record_sep($$records[0]);
2369: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2370: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2371:
2372: $r->print('Samples<br /><table border="2"><tr>');
2373: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
2374: $r->print('</tr>');
2375: foreach my $hash (\%sone,\%stwo,\%sthree) {
2376: $r->print('<tr>');
2377: foreach (sort({$a <=> $b} keys(%sone))) {
2378: $r->print('<td>');
2379: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2380: $r->print('</td>');
2381: }
2382: $r->print('</tr>');
2383: }
2384: $r->print('</tr></table><br />'."\n");
2385: }
2386:
2387: =pod
2388:
2389: =item * csv_print_select_table($r,$records,$d)
2390:
2391: Prints a table to create associations between values and table columns.
2392: $r is an Apache Request ref,
2393: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2394: $d is an array of 2 element arrays (internal name, displayed name)
2395:
2396: =cut
2397:
2398: sub csv_print_select_table {
2399: my ($r,$records,$d) = @_;
2400: my $i=0;my %sone;
2401: %sone=&record_sep($$records[0]);
2402: $r->print('Associate columns with student attributes.'."\n".
2403: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
2404: foreach (@$d) {
2405: my ($value,$display)=@{ $_ };
2406: $r->print('<tr><td>'.$display.'</td>');
2407:
2408: $r->print('<td><select name=f'.$i.
2409: ' onchange="javascript:flip(this.form,'.$i.');">');
2410: $r->print('<option value="none"></option>');
2411: foreach (sort({$a <=> $b} keys(%sone))) {
2412: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2413: }
2414: $r->print('</select></td></tr>'."\n");
2415: $i++;
2416: }
2417: $i--;
2418: return $i;
2419: }
2420:
2421: =pod
2422:
2423: =item * csv_samples_select_table($r,$records,$d)
2424:
2425: Prints a table of sample values from the upload and can make associate samples to internal names.
2426:
2427: $r is an Apache Request ref,
2428: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2429: $d is an array of 2 element arrays (internal name, displayed name)
2430:
2431: =cut
2432:
2433: sub csv_samples_select_table {
2434: my ($r,$records,$d) = @_;
2435: my %sone; my %stwo; my %sthree;
2436: my $i=0;
2437:
2438: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
2439: %sone=&record_sep($$records[0]);
2440: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2441: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2442:
2443: foreach (sort keys %sone) {
2444: $r->print('<tr><td><select name=f'.$i.
2445: ' onchange="javascript:flip(this.form,'.$i.');">');
2446: foreach (@$d) {
2447: my ($value,$display)=@{ $_ };
2448: $r->print('<option value='.$value.'>'.$display.'</option>');
2449: }
2450: $r->print('</select></td><td>');
2451: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2452: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2453: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2454: $r->print('</td></tr>');
2455: $i++;
2456: }
2457: $i--;
2458: return($i);
2459: }
2460:
2461: =pod
2462:
2463: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2464:
2465: Returns either 1 or undef
2466:
2467: 1 if the part is to be hidden, undef if it is to be shown
2468:
2469: Arguments are:
2470:
2471: $id the id of the part to be checked
2472: $symb, optional the symb of the resource to check
2473: $udom, optional the domain of the user to check for
2474: $uname, optional the username of the user to check for
2475:
2476: =cut
2477:
2478: sub check_if_partid_hidden {
2479: my ($id,$symb,$udom,$uname) = @_;
2480: my $hiddenparts=&Apache::lonnet::EXT('resource.0.parameter_hiddenparts',
2481: $symb,$udom,$uname);
2482: my @hiddenlist=split(/,/,$hiddenparts);
2483: foreach my $checkid (@hiddenlist) {
2484: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return 1; }
2485: }
2486: return undef;
2487: }
2488:
2489: =pod
2490:
2491: =back
2492:
2493: =cut
2494:
2495: 1;
2496: __END__;
2497:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to loncommon.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface