1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.113 2003/08/26 17:20:45 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: =cut
628:
629: sub csv_translate {
630: my $text = shift;
631: $text =~ s/\"/\"\"/g;
632: $text =~ s/\n//g;
633: return $text;
634: }
635:
636: =pod
637:
638: =item * change_content_javascript():
639:
640: This and the next function allow you to create small sections of an
641: otherwise static HTML page that you can update on the fly with
642: Javascript, even in Netscape 4.
643:
644: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
645: must be written to the HTML page once. It will prove the Javascript
646: function "change(name, content)". Calling the change function with the
647: name of the section
648: you want to update, matching the name passed to C<changable_area>, and
649: the new content you want to put in there, will put the content into
650: that area.
651:
652: B<Note>: Netscape 4 only reserves enough space for the changable area
653: to contain room for the original contents. You need to "make space"
654: for whatever changes you wish to make, and be B<sure> to check your
655: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
656: it's adequate for updating a one-line status display, but little more.
657: This script will set the space to 100% width, so you only need to
658: worry about height in Netscape 4.
659:
660: Modern browsers are much less limiting, and if you can commit to the
661: user not using Netscape 4, this feature may be used freely with
662: pretty much any HTML.
663:
664: =cut
665:
666: sub change_content_javascript {
667: # If we're on Netscape 4, we need to use Layer-based code
668: if ($ENV{'browser.type'} eq 'netscape' &&
669: $ENV{'browser.version'} =~ /^4\./) {
670: return (<<NETSCAPE4);
671: function change(name, content) {
672: doc = document.layers[name+"___escape"].layers[0].document;
673: doc.open();
674: doc.write(content);
675: doc.close();
676: }
677: NETSCAPE4
678: } else {
679: # Otherwise, we need to use semi-standards-compliant code
680: # (technically, "innerHTML" isn't standard but the equivalent
681: # is really scary, and every useful browser supports it
682: return (<<DOMBASED);
683: function change(name, content) {
684: element = document.getElementById(name);
685: element.innerHTML = content;
686: }
687: DOMBASED
688: }
689: }
690:
691: =pod
692:
693: =item * changable_area($name, $origContent):
694:
695: This provides a "changable area" that can be modified on the fly via
696: the Javascript code provided in C<change_content_javascript>. $name is
697: the name you will use to reference the area later; do not repeat the
698: same name on a given HTML page more then once. $origContent is what
699: the area will originally contain, which can be left blank.
700:
701: =cut
702:
703: sub changable_area {
704: my ($name, $origContent) = @_;
705:
706: if ($ENV{'browser.type'} eq 'netscape' &&
707: $ENV{'browser.version'} =~ /^4\./) {
708: # If this is netscape 4, we need to use the Layer tag
709: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
710: } else {
711: return "<span id='$name'>$origContent</span>";
712: }
713: }
714:
715: =pod
716:
717: =back
718:
719: =cut
720:
721: ###############################################################
722: ## Home server <option> list generating code ##
723: ###############################################################
724:
725: =pod
726:
727: =head1 Home Server option list generating code
728:
729: =over 4
730:
731: =item * get_domains()
732:
733: Returns an array containing each of the domains listed in the hosts.tab
734: file.
735:
736: =cut
737:
738: #-------------------------------------------
739: sub get_domains {
740: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
741: my @domains;
742: my %seen;
743: foreach (sort values(%Apache::lonnet::hostdom)) {
744: push (@domains,$_) unless $seen{$_}++;
745: }
746: return @domains;
747: }
748:
749: #-------------------------------------------
750:
751: =pod
752:
753: =item * select_form($defdom,$name,%hash)
754:
755: Returns a string containing a <select name='$name' size='1'> form to
756: allow a user to select options from a hash option_name => displayed text.
757: See lonrights.pm for an example invocation and use.
758:
759: =cut
760:
761: #-------------------------------------------
762: sub select_form {
763: my ($def,$name,%hash) = @_;
764: my $selectform = "<select name=\"$name\" size=\"1\">\n";
765: foreach (sort keys %hash) {
766: $selectform.="<option value=\"$_\" ".
767: ($_ eq $def ? 'selected' : '').
768: ">".$hash{$_}."</option>\n";
769: }
770: $selectform.="</select>";
771: return $selectform;
772: }
773:
774:
775: #-------------------------------------------
776:
777: =pod
778:
779: =item * select_dom_form($defdom,$name,$includeempty)
780:
781: Returns a string containing a <select name='$name' size='1'> form to
782: allow a user to select the domain to preform an operation in.
783: See loncreateuser.pm for an example invocation and use.
784:
785: If the $includeempty flag is set, it also includes an empty choice ("no domain
786: selected");
787:
788: =cut
789:
790: #-------------------------------------------
791: sub select_dom_form {
792: my ($defdom,$name,$includeempty) = @_;
793: my @domains = get_domains();
794: if ($includeempty) { @domains=('',@domains); }
795: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
796: foreach (@domains) {
797: $selectdomain.="<option value=\"$_\" ".
798: ($_ eq $defdom ? 'selected' : '').
799: ">$_</option>\n";
800: }
801: $selectdomain.="</select>";
802: return $selectdomain;
803: }
804:
805: #-------------------------------------------
806:
807: =pod
808:
809: =item * get_library_servers($domain)
810:
811: Returns a hash which contains keys like '103l3' and values like
812: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
813: given $domain.
814:
815: =cut
816:
817: #-------------------------------------------
818: sub get_library_servers {
819: my $domain = shift;
820: my %library_servers;
821: foreach (keys(%Apache::lonnet::libserv)) {
822: if ($Apache::lonnet::hostdom{$_} eq $domain) {
823: $library_servers{$_} = $Apache::lonnet::hostname{$_};
824: }
825: }
826: return %library_servers;
827: }
828:
829: #-------------------------------------------
830:
831: =pod
832:
833: =item * home_server_option_list($domain)
834:
835: returns a string which contains an <option> list to be used in a
836: <select> form input. See loncreateuser.pm for an example.
837:
838: =cut
839:
840: #-------------------------------------------
841: sub home_server_option_list {
842: my $domain = shift;
843: my %servers = &get_library_servers($domain);
844: my $result = '';
845: foreach (sort keys(%servers)) {
846: $result.=
847: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
848: }
849: return $result;
850: }
851:
852: =pod
853:
854: =back
855:
856: =cut
857:
858: ###############################################################
859: ## Decoding User Agent ##
860: ###############################################################
861:
862: =pod
863:
864: =head1 Decoding the User Agent
865:
866: =over 4
867:
868: =item * &decode_user_agent()
869:
870: Inputs: $r
871:
872: Outputs:
873:
874: =over 4
875:
876: =item * $httpbrowser
877:
878: =item * $clientbrowser
879:
880: =item * $clientversion
881:
882: =item * $clientmathml
883:
884: =item * $clientunicode
885:
886: =item * $clientos
887:
888: =back
889:
890: =cut
891:
892: ###############################################################
893: ###############################################################
894: sub decode_user_agent {
895: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
896: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
897: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
898: my $clientbrowser='unknown';
899: my $clientversion='0';
900: my $clientmathml='';
901: my $clientunicode='0';
902: for (my $i=0;$i<=$#browsertype;$i++) {
903: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
904: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
905: $clientbrowser=$bname;
906: $httpbrowser=~/$vreg/i;
907: $clientversion=$1;
908: $clientmathml=($clientversion>=$minv);
909: $clientunicode=($clientversion>=$univ);
910: }
911: }
912: my $clientos='unknown';
913: if (($httpbrowser=~/linux/i) ||
914: ($httpbrowser=~/unix/i) ||
915: ($httpbrowser=~/ux/i) ||
916: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
917: if (($httpbrowser=~/vax/i) ||
918: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
919: if ($httpbrowser=~/next/i) { $clientos='next'; }
920: if (($httpbrowser=~/mac/i) ||
921: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
922: if ($httpbrowser=~/win/i) { $clientos='win'; }
923: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
924: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
925: $clientunicode,$clientos,);
926: }
927:
928: =pod
929:
930: =back
931:
932: =cut
933:
934: ###############################################################
935: ## Authentication changing form generation subroutines ##
936: ###############################################################
937: ##
938: ## All of the authform_xxxxxxx subroutines take their inputs in a
939: ## hash, and have reasonable default values.
940: ##
941: ## formname = the name given in the <form> tag.
942: #-------------------------------------------
943:
944: =pod
945:
946: =head1 Authentication Routines
947:
948: =over 4
949:
950: =item * authform_xxxxxx
951:
952: The authform_xxxxxx subroutines provide javascript and html forms which
953: handle some of the conveniences required for authentication forms.
954: This is not an optimal method, but it works.
955:
956: See loncreateuser.pm for invocation and use examples.
957:
958: =over 4
959:
960: =item * authform_header
961:
962: =item * authform_authorwarning
963:
964: =item * authform_nochange
965:
966: =item * authform_kerberos
967:
968: =item * authform_internal
969:
970: =item * authform_filesystem
971:
972: =back
973:
974: =cut
975:
976: #-------------------------------------------
977: sub authform_header{
978: my %in = (
979: formname => 'cu',
980: kerb_def_dom => '',
981: @_,
982: );
983: $in{'formname'} = 'document.' . $in{'formname'};
984: my $result='';
985:
986: #---------------------------------------------- Code for upper case translation
987: my $Javascript_toUpperCase;
988: unless ($in{kerb_def_dom}) {
989: $Javascript_toUpperCase =<<"END";
990: switch (choice) {
991: case 'krb': currentform.elements[choicearg].value =
992: currentform.elements[choicearg].value.toUpperCase();
993: break;
994: default:
995: }
996: END
997: } else {
998: $Javascript_toUpperCase = "";
999: }
1000:
1001: $result.=<<"END";
1002: var current = new Object();
1003: current.radiovalue = 'nochange';
1004: current.argfield = null;
1005:
1006: function changed_radio(choice,currentform) {
1007: var choicearg = choice + 'arg';
1008: // If a radio button in changed, we need to change the argfield
1009: if (current.radiovalue != choice) {
1010: current.radiovalue = choice;
1011: if (current.argfield != null) {
1012: currentform.elements[current.argfield].value = '';
1013: }
1014: if (choice == 'nochange') {
1015: current.argfield = null;
1016: } else {
1017: current.argfield = choicearg;
1018: switch(choice) {
1019: case 'krb':
1020: currentform.elements[current.argfield].value =
1021: "$in{'kerb_def_dom'}";
1022: break;
1023: default:
1024: break;
1025: }
1026: }
1027: }
1028: return;
1029: }
1030:
1031: function changed_text(choice,currentform) {
1032: var choicearg = choice + 'arg';
1033: if (currentform.elements[choicearg].value !='') {
1034: $Javascript_toUpperCase
1035: // clear old field
1036: if ((current.argfield != choicearg) && (current.argfield != null)) {
1037: currentform.elements[current.argfield].value = '';
1038: }
1039: current.argfield = choicearg;
1040: }
1041: set_auth_radio_buttons(choice,currentform);
1042: return;
1043: }
1044:
1045: function set_auth_radio_buttons(newvalue,currentform) {
1046: var i=0;
1047: while (i < currentform.login.length) {
1048: if (currentform.login[i].value == newvalue) { break; }
1049: i++;
1050: }
1051: if (i == currentform.login.length) {
1052: return;
1053: }
1054: current.radiovalue = newvalue;
1055: currentform.login[i].checked = true;
1056: return;
1057: }
1058: END
1059: return $result;
1060: }
1061:
1062: sub authform_authorwarning{
1063: my $result='';
1064: $result=<<"END";
1065: <i>As a general rule, only authors or co-authors should be filesystem
1066: authenticated (which allows access to the server filesystem).</i>
1067: END
1068: return $result;
1069: }
1070:
1071: sub authform_nochange{
1072: my %in = (
1073: formname => 'document.cu',
1074: kerb_def_dom => 'MSU.EDU',
1075: @_,
1076: );
1077: my $result='';
1078: $result.=<<"END";
1079: <input type="radio" name="login" value="nochange" checked="checked"
1080: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
1081: Do not change login data
1082: END
1083: return $result;
1084: }
1085:
1086: sub authform_kerberos{
1087: my %in = (
1088: formname => 'document.cu',
1089: kerb_def_dom => 'MSU.EDU',
1090: kerb_def_auth => 'krb4',
1091: @_,
1092: );
1093: my $result='';
1094: my $check4;
1095: my $check5;
1096: if ($in{'kerb_def_auth'} eq 'krb5') {
1097: $check5 = " checked=\"on\"";
1098: } else {
1099: $check4 = " checked=\"on\"";
1100: }
1101: $result.=<<"END";
1102: <input type="radio" name="login" value="krb"
1103: onclick="javascript:changed_radio('krb',$in{'formname'});"
1104: onchange="javascript:changed_radio('krb',$in{'formname'});" />
1105: Kerberos authenticated with domain
1106: <input type="text" size="10" name="krbarg" value="$in{'kerb_def_dom'}"
1107: onchange="javascript:changed_text('krb',$in{'formname'});" />
1108: <input type="radio" name="krbver" value="4" $check4 />Version 4
1109: <input type="radio" name="krbver" value="5" $check5 />Version 5
1110: END
1111: return $result;
1112: }
1113:
1114: sub authform_internal{
1115: my %args = (
1116: formname => 'document.cu',
1117: kerb_def_dom => 'MSU.EDU',
1118: @_,
1119: );
1120: my $result='';
1121: $result.=<<"END";
1122: <input type="radio" name="login" value="int"
1123: onchange="javascript:changed_radio('int',$args{'formname'});"
1124: onclick="javascript:changed_radio('int',$args{'formname'});" />
1125: Internally authenticated (with initial password
1126: <input type="text" size="10" name="intarg" value=""
1127: onchange="javascript:changed_text('int',$args{'formname'});" />)
1128: END
1129: return $result;
1130: }
1131:
1132: sub authform_local{
1133: my %in = (
1134: formname => 'document.cu',
1135: kerb_def_dom => 'MSU.EDU',
1136: @_,
1137: );
1138: my $result='';
1139: $result.=<<"END";
1140: <input type="radio" name="login" value="loc"
1141: onchange="javascript:changed_radio('loc',$in{'formname'});"
1142: onclick="javascript:changed_radio('loc',$in{'formname'});" />
1143: Local Authentication with argument
1144: <input type="text" size="10" name="locarg" value=""
1145: onchange="javascript:changed_text('loc',$in{'formname'});" />
1146: END
1147: return $result;
1148: }
1149:
1150: sub authform_filesystem{
1151: my %in = (
1152: formname => 'document.cu',
1153: kerb_def_dom => 'MSU.EDU',
1154: @_,
1155: );
1156: my $result='';
1157: $result.=<<"END";
1158: <input type="radio" name="login" value="fsys"
1159: onchange="javascript:changed_radio('fsys',$in{'formname'});"
1160: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
1161: Filesystem authenticated (with initial password
1162: <input type="text" size="10" name="fsysarg" value=""
1163: onchange="javascript:changed_text('fsys',$in{'formname'});">)
1164: END
1165: return $result;
1166: }
1167:
1168: =pod
1169:
1170: =back
1171:
1172: =cut
1173:
1174: ###############################################################
1175: ## Get Authentication Defaults for Domain ##
1176: ###############################################################
1177:
1178: =pod
1179:
1180: =head1 Domains and Authentication
1181:
1182: Returns default authentication type and an associated argument as
1183: listed in file 'domain.tab'.
1184:
1185: =over 4
1186:
1187: =item * get_auth_defaults
1188:
1189: get_auth_defaults($target_domain) returns the default authentication
1190: type and an associated argument (initial password or a kerberos domain).
1191: These values are stored in lonTabs/domain.tab
1192:
1193: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1194:
1195: If target_domain is not found in domain.tab, returns nothing ('').
1196:
1197: =cut
1198:
1199: #-------------------------------------------
1200: sub get_auth_defaults {
1201: my $domain=shift;
1202: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1203: }
1204: ###############################################################
1205: ## End Get Authentication Defaults for Domain ##
1206: ###############################################################
1207:
1208: ###############################################################
1209: ## Get Kerberos Defaults for Domain ##
1210: ###############################################################
1211: ##
1212: ## Returns default kerberos version and an associated argument
1213: ## as listed in file domain.tab. If not listed, provides
1214: ## appropriate default domain and kerberos version.
1215: ##
1216: #-------------------------------------------
1217:
1218: =pod
1219:
1220: =item * get_kerberos_defaults
1221:
1222: get_kerberos_defaults($target_domain) returns the default kerberos
1223: version and domain. If not found in domain.tabs, it defaults to
1224: version 4 and the domain of the server.
1225:
1226: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1227:
1228: =cut
1229:
1230: #-------------------------------------------
1231: sub get_kerberos_defaults {
1232: my $domain=shift;
1233: my ($krbdef,$krbdefdom) =
1234: &Apache::loncommon::get_auth_defaults($domain);
1235: unless ($krbdef =~/^krb/ && $krbdefdom) {
1236: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1237: my $krbdefdom=$1;
1238: $krbdefdom=~tr/a-z/A-Z/;
1239: $krbdef = "krb4";
1240: }
1241: return ($krbdef,$krbdefdom);
1242: }
1243:
1244: =pod
1245:
1246: =back
1247:
1248: =cut
1249:
1250: ###############################################################
1251: ## Thesaurus Functions ##
1252: ###############################################################
1253:
1254: =pod
1255:
1256: =head1 Thesaurus Functions
1257:
1258: =over 4
1259:
1260: =item * initialize_keywords
1261:
1262: Initializes the package variable %Keywords if it is empty. Uses the
1263: package variable $thesaurus_db_file.
1264:
1265: =cut
1266:
1267: ###################################################
1268:
1269: sub initialize_keywords {
1270: return 1 if (scalar keys(%Keywords));
1271: # If we are here, %Keywords is empty, so fill it up
1272: # Make sure the file we need exists...
1273: if (! -e $thesaurus_db_file) {
1274: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1275: " failed because it does not exist");
1276: return 0;
1277: }
1278: # Set up the hash as a database
1279: my %thesaurus_db;
1280: if (! tie(%thesaurus_db,'GDBM_File',
1281: $thesaurus_db_file,&GDBM_READER(),0640)){
1282: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1283: $thesaurus_db_file);
1284: return 0;
1285: }
1286: # Get the average number of appearances of a word.
1287: my $avecount = $thesaurus_db{'average.count'};
1288: # Put keywords (those that appear > average) into %Keywords
1289: while (my ($word,$data)=each (%thesaurus_db)) {
1290: my ($count,undef) = split /:/,$data;
1291: $Keywords{$word}++ if ($count > $avecount);
1292: }
1293: untie %thesaurus_db;
1294: # Remove special values from %Keywords.
1295: foreach ('total.count','average.count') {
1296: delete($Keywords{$_}) if (exists($Keywords{$_}));
1297: }
1298: return 1;
1299: }
1300:
1301: ###################################################
1302:
1303: =pod
1304:
1305: =item * keyword($word)
1306:
1307: Returns true if $word is a keyword. A keyword is a word that appears more
1308: than the average number of times in the thesaurus database. Calls
1309: &initialize_keywords
1310:
1311: =cut
1312:
1313: ###################################################
1314:
1315: sub keyword {
1316: return if (!&initialize_keywords());
1317: my $word=lc(shift());
1318: $word=~s/\W//g;
1319: return exists($Keywords{$word});
1320: }
1321:
1322: ###############################################################
1323:
1324: =pod
1325:
1326: =item * get_related_words
1327:
1328: Look up a word in the thesaurus. Takes a scalar arguement and returns
1329: an array of words. If the keyword is not in the thesaurus, an empty array
1330: will be returned. The order of the words returned is determined by the
1331: database which holds them.
1332:
1333: Uses global $thesaurus_db_file.
1334:
1335: =cut
1336:
1337: ###############################################################
1338: sub get_related_words {
1339: my $keyword = shift;
1340: my %thesaurus_db;
1341: if (! -e $thesaurus_db_file) {
1342: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1343: "failed because the file does not exist");
1344: return ();
1345: }
1346: if (! tie(%thesaurus_db,'GDBM_File',
1347: $thesaurus_db_file,&GDBM_READER(),0640)){
1348: return ();
1349: }
1350: my @Words=();
1351: if (exists($thesaurus_db{$keyword})) {
1352: $_ = $thesaurus_db{$keyword};
1353: (undef,@Words) = split/:/; # The first element is the number of times
1354: # the word appears. We do not need it now.
1355: for (my $i=0;$i<=$#Words;$i++) {
1356: ($Words[$i],undef)= split/\,/,$Words[$i];
1357: }
1358: }
1359: untie %thesaurus_db;
1360: return @Words;
1361: }
1362:
1363: =pod
1364:
1365: =back
1366:
1367: =cut
1368:
1369: # -------------------------------------------------------------- Plaintext name
1370: =pod
1371:
1372: =head1 User Name Functions
1373:
1374: =over 4
1375:
1376: =item * plainname($uname,$udom)
1377:
1378: Takes a users logon name and returns it as a string in
1379: "first middle last generation" form
1380:
1381: =cut
1382:
1383: ###############################################################
1384: sub plainname {
1385: my ($uname,$udom)=@_;
1386: my %names=&Apache::lonnet::get('environment',
1387: ['firstname','middlename','lastname','generation'],
1388: $udom,$uname);
1389: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1390: $names{'lastname'}.' '.$names{'generation'};
1391: $name=~s/\s+$//;
1392: $name=~s/\s+/ /g;
1393: return $name;
1394: }
1395:
1396: # -------------------------------------------------------------------- Nickname
1397: =pod
1398:
1399: =item * nickname($uname,$udom)
1400:
1401: Gets a users name and returns it as a string as
1402:
1403: ""nickname""
1404:
1405: if the user has a nickname or
1406:
1407: "first middle last generation"
1408:
1409: if the user does not
1410:
1411: =cut
1412:
1413: sub nickname {
1414: my ($uname,$udom)=@_;
1415: my %names=&Apache::lonnet::get('environment',
1416: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1417: my $name=$names{'nickname'};
1418: if ($name) {
1419: $name='"'.$name.'"';
1420: } else {
1421: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1422: $names{'lastname'}.' '.$names{'generation'};
1423: $name=~s/\s+$//;
1424: $name=~s/\s+/ /g;
1425: }
1426: return $name;
1427: }
1428:
1429:
1430: # ------------------------------------------------------------------ Screenname
1431:
1432: =pod
1433:
1434: =item * screenname($uname,$udom)
1435:
1436: Gets a users screenname and returns it as a string
1437:
1438: =cut
1439:
1440: sub screenname {
1441: my ($uname,$udom)=@_;
1442: my %names=
1443: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1444: return $names{'screenname'};
1445: }
1446:
1447: # ------------------------------------------------------------- Message Wrapper
1448:
1449: sub messagewrapper {
1450: my ($link,$un,$do)=@_;
1451: return
1452: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1453: }
1454: # --------------------------------------------------------------- Notes Wrapper
1455:
1456: sub noteswrapper {
1457: my ($link,$un,$do)=@_;
1458: return
1459: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1460: }
1461: # ------------------------------------------------------------- Aboutme Wrapper
1462:
1463: sub aboutmewrapper {
1464: my ($link,$username,$domain)=@_;
1465: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1466: }
1467:
1468: # ------------------------------------------------------------ Syllabus Wrapper
1469:
1470:
1471: sub syllabuswrapper {
1472: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1473: if ($fontcolor) {
1474: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1475: }
1476: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1477: }
1478:
1479: =pod
1480:
1481: =back
1482:
1483: =head1 Access .tab File Data
1484:
1485: =over 4
1486:
1487: =item * languageids()
1488:
1489: returns list of all language ids
1490:
1491: =cut
1492:
1493: sub languageids {
1494: return sort(keys(%language));
1495: }
1496:
1497: =pod
1498:
1499: =item * languagedescription()
1500:
1501: returns description of a specified language id
1502:
1503: =cut
1504:
1505: sub languagedescription {
1506: return $language{shift(@_)};
1507: }
1508:
1509: =pod
1510:
1511: =item * copyrightids()
1512:
1513: returns list of all copyrights
1514:
1515: =cut
1516:
1517: sub copyrightids {
1518: return sort(keys(%cprtag));
1519: }
1520:
1521: =pod
1522:
1523: =item * copyrightdescription()
1524:
1525: returns description of a specified copyright id
1526:
1527: =cut
1528:
1529: sub copyrightdescription {
1530: return $cprtag{shift(@_)};
1531: }
1532:
1533: =pod
1534:
1535: =item * filecategories()
1536:
1537: returns list of all file categories
1538:
1539: =cut
1540:
1541: sub filecategories {
1542: return sort(keys(%category_extensions));
1543: }
1544:
1545: =pod
1546:
1547: =item * filecategorytypes()
1548:
1549: returns list of file types belonging to a given file
1550: category
1551:
1552: =cut
1553:
1554: sub filecategorytypes {
1555: return @{$category_extensions{lc($_[0])}};
1556: }
1557:
1558: =pod
1559:
1560: =item * fileembstyle()
1561:
1562: returns embedding style for a specified file type
1563:
1564: =cut
1565:
1566: sub fileembstyle {
1567: return $fe{lc(shift(@_))};
1568: }
1569:
1570: =pod
1571:
1572: =item * filedescription()
1573:
1574: returns description for a specified file type
1575:
1576: =cut
1577:
1578: sub filedescription {
1579: return $fd{lc(shift(@_))};
1580: }
1581:
1582: =pod
1583:
1584: =item * filedescriptionex()
1585:
1586: returns description for a specified file type with
1587: extra formatting
1588:
1589: =cut
1590:
1591: sub filedescriptionex {
1592: my $ex=shift;
1593: return '.'.$ex.' '.$fd{lc($ex)};
1594: }
1595:
1596: # End of .tab access
1597: =pod
1598:
1599: =back
1600:
1601: =cut
1602:
1603: # ------------------------------------------------------------------ File Types
1604: sub fileextensions {
1605: return sort(keys(%fe));
1606: }
1607:
1608: # ----------------------------------------------------------- Display Languages
1609: # returns a hash with all desired display languages
1610: #
1611:
1612: sub display_languages {
1613: my %languages=();
1614: if ($ENV{'environment.languages'}) {
1615: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'})) {
1616: $languages{$_}=1;
1617: }
1618: }
1619: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1620: foreach (split(/\s*(\,|\;|\:)\s*/,
1621: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'})) {
1622: $languages{$_}=1;
1623: }
1624: }
1625: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1626: if ($ENV{'form.displaylanguage'}) {
1627: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1628: $languages{$_}=1;
1629: }
1630: }
1631: return %languages;
1632: }
1633:
1634: ###############################################################
1635: ## Student Answer Attempts ##
1636: ###############################################################
1637:
1638: =pod
1639:
1640: =head1 Alternate Problem Views
1641:
1642: =over 4
1643:
1644: =item * get_previous_attempt($symb, $username, $domain, $course,
1645: $getattempt, $regexp, $gradesub)
1646:
1647: Return string with previous attempt on problem. Arguments:
1648:
1649: =over 4
1650:
1651: =item * $symb: Problem, including path
1652:
1653: =item * $username: username of the desired student
1654:
1655: =item * $domain: domain of the desired student
1656:
1657: =item * $course: Course ID
1658:
1659: =item * $getattempt: Leave blank for all attempts, otherwise put
1660: something
1661:
1662: =item * $regexp: if string matches this regexp, the string will be
1663: sent to $gradesub
1664:
1665: =item * $gradesub: routine that processes the string if it matches $regexp
1666:
1667: =back
1668:
1669: The output string is a table containing all desired attempts, if any.
1670:
1671: =cut
1672:
1673: sub get_previous_attempt {
1674: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1675: my $prevattempts='';
1676: no strict 'refs';
1677: if ($symb) {
1678: my (%returnhash)=
1679: &Apache::lonnet::restore($symb,$course,$domain,$username);
1680: if ($returnhash{'version'}) {
1681: my %lasthash=();
1682: my $version;
1683: for ($version=1;$version<=$returnhash{'version'};$version++) {
1684: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1685: $lasthash{$_}=$returnhash{$version.':'.$_};
1686: }
1687: }
1688: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1689: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1690: foreach (sort(keys %lasthash)) {
1691: my ($ign,@parts) = split(/\./,$_);
1692: if ($#parts > 0) {
1693: my $data=$parts[-1];
1694: pop(@parts);
1695: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1696: } else {
1697: if ($#parts == 0) {
1698: $prevattempts.='<th>'.$parts[0].'</th>';
1699: } else {
1700: $prevattempts.='<th>'.$ign.'</th>';
1701: }
1702: }
1703: }
1704: if ($getattempt eq '') {
1705: for ($version=1;$version<=$returnhash{'version'};$version++) {
1706: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1707: foreach (sort(keys %lasthash)) {
1708: my $value;
1709: if ($_ =~ /timestamp/) {
1710: $value=scalar(localtime($returnhash{$version.':'.$_}));
1711: } else {
1712: $value=$returnhash{$version.':'.$_};
1713: }
1714: $prevattempts.='<td>'.$value.' </td>';
1715: }
1716: }
1717: }
1718: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1719: foreach (sort(keys %lasthash)) {
1720: my $value;
1721: if ($_ =~ /timestamp/) {
1722: $value=scalar(localtime($lasthash{$_}));
1723: } else {
1724: $value=$lasthash{$_};
1725: }
1726: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1727: $prevattempts.='<td>'.$value.' </td>';
1728: }
1729: $prevattempts.='</tr></table></td></tr></table>';
1730: } else {
1731: $prevattempts='Nothing submitted - no attempts.';
1732: }
1733: } else {
1734: $prevattempts='No data.';
1735: }
1736: }
1737:
1738: sub relative_to_absolute {
1739: my ($url,$output)=@_;
1740: my $parser=HTML::TokeParser->new(\$output);
1741: my $token;
1742: my $thisdir=$url;
1743: my @rlinks=();
1744: while ($token=$parser->get_token) {
1745: if ($token->[0] eq 'S') {
1746: if ($token->[1] eq 'a') {
1747: if ($token->[2]->{'href'}) {
1748: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1749: }
1750: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1751: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1752: } elsif ($token->[1] eq 'base') {
1753: $thisdir=$token->[2]->{'href'};
1754: }
1755: }
1756: }
1757: $thisdir=~s-/[^/]*$--;
1758: foreach (@rlinks) {
1759: unless (($_=~/^http:\/\//i) ||
1760: ($_=~/^\//) ||
1761: ($_=~/^javascript:/i) ||
1762: ($_=~/^mailto:/i) ||
1763: ($_=~/^\#/)) {
1764: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1765: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1766: }
1767: }
1768: # -------------------------------------------------- Deal with Applet codebases
1769: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1770: return $output;
1771: }
1772:
1773: =pod
1774:
1775: =item * get_student_view
1776:
1777: show a snapshot of what student was looking at
1778:
1779: =cut
1780:
1781: sub get_student_view {
1782: my ($symb,$username,$domain,$courseid,$target) = @_;
1783: my ($map,$id,$feedurl) = split(/___/,$symb);
1784: my (%old,%moreenv);
1785: my @elements=('symb','courseid','domain','username');
1786: foreach my $element (@elements) {
1787: $old{$element}=$ENV{'form.grade_'.$element};
1788: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1789: }
1790: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1791: &Apache::lonnet::appenv(%moreenv);
1792: $feedurl=&Apache::lonnet::clutter($feedurl);
1793: my $userview=&Apache::lonnet::ssi_body($feedurl);
1794: &Apache::lonnet::delenv('form.grade_');
1795: foreach my $element (@elements) {
1796: $ENV{'form.grade_'.$element}=$old{$element};
1797: }
1798: $userview=~s/\<body[^\>]*\>//gi;
1799: $userview=~s/\<\/body\>//gi;
1800: $userview=~s/\<html\>//gi;
1801: $userview=~s/\<\/html\>//gi;
1802: $userview=~s/\<head\>//gi;
1803: $userview=~s/\<\/head\>//gi;
1804: $userview=~s/action\s*\=/would_be_action\=/gi;
1805: $userview=&relative_to_absolute($feedurl,$userview);
1806: return $userview;
1807: }
1808:
1809: =pod
1810:
1811: =item * get_student_answers()
1812:
1813: show a snapshot of how student was answering problem
1814:
1815: =cut
1816:
1817: sub get_student_answers {
1818: my ($symb,$username,$domain,$courseid,%form) = @_;
1819: my ($map,$id,$feedurl) = split(/___/,$symb);
1820: my (%old,%moreenv);
1821: my @elements=('symb','courseid','domain','username');
1822: foreach my $element (@elements) {
1823: $old{$element}=$ENV{'form.grade_'.$element};
1824: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1825: }
1826: $moreenv{'form.grade_target'}='answer';
1827: &Apache::lonnet::appenv(%moreenv);
1828: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1829: &Apache::lonnet::delenv('form.grade_');
1830: foreach my $element (@elements) {
1831: $ENV{'form.grade_'.$element}=$old{$element};
1832: }
1833: return $userview;
1834: }
1835:
1836: =pod
1837:
1838: =back
1839:
1840: =cut
1841:
1842: ###############################################
1843:
1844:
1845: sub timehash {
1846: my @ltime=localtime(shift);
1847: return ( 'seconds' => $ltime[0],
1848: 'minutes' => $ltime[1],
1849: 'hours' => $ltime[2],
1850: 'day' => $ltime[3],
1851: 'month' => $ltime[4]+1,
1852: 'year' => $ltime[5]+1900,
1853: 'weekday' => $ltime[6],
1854: 'dayyear' => $ltime[7]+1,
1855: 'dlsav' => $ltime[8] );
1856: }
1857:
1858: sub maketime {
1859: my %th=@_;
1860: return POSIX::mktime(
1861: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1862: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1863: }
1864:
1865:
1866: #########################################
1867: #
1868: # Retro-fixing of un-backward-compatible time format
1869:
1870: sub unsqltime {
1871: my $timestamp=shift;
1872: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1873: $timestamp=&maketime(
1874: 'year'=>$1,'month'=>$2,'day'=>$3,
1875: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1876: }
1877: return $timestamp;
1878: }
1879:
1880: #########################################
1881:
1882: sub findallcourses {
1883: my %courses=();
1884: my $now=time;
1885: foreach (keys %ENV) {
1886: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1887: my ($starttime,$endtime)=$ENV{$_};
1888: my $active=1;
1889: if ($starttime) {
1890: if ($now<$starttime) { $active=0; }
1891: }
1892: if ($endtime) {
1893: if ($now>$endtime) { $active=0; }
1894: }
1895: if ($active) { $courses{$1.'_'.$2}=1; }
1896: }
1897: }
1898: return keys %courses;
1899: }
1900:
1901: ###############################################
1902: ###############################################
1903:
1904: =pod
1905:
1906: =head1 Domain Template Functions
1907:
1908: =over 4
1909:
1910: =item * &determinedomain()
1911:
1912: Inputs: $domain (usually will be undef)
1913:
1914: Returns: Determines which domain should be used for designs
1915:
1916: =cut
1917:
1918: ###############################################
1919: sub determinedomain {
1920: my $domain=shift;
1921: if (! $domain) {
1922: # Determine domain if we have not been given one
1923: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1924: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1925: if ($ENV{'request.role.domain'}) {
1926: $domain=$ENV{'request.role.domain'};
1927: }
1928: }
1929: return $domain;
1930: }
1931: ###############################################
1932: =pod
1933:
1934: =item * &domainlogo()
1935:
1936: Inputs: $domain (usually will be undef)
1937:
1938: Returns: A link to a domain logo, if the domain logo exists.
1939: If the domain logo does not exist, a description of the domain.
1940:
1941: =cut
1942:
1943: ###############################################
1944: sub domainlogo {
1945: my $domain = &determinedomain(shift);
1946: # See if there is a logo
1947: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1948: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
1949: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1950: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
1951: '/adm/lonDomLogos/'.$domain.'.gif" />';
1952: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1953: return $Apache::lonnet::domaindescription{$domain};
1954: } else {
1955: return '';
1956: }
1957: }
1958: ##############################################
1959:
1960: =pod
1961:
1962: =item * &designparm()
1963:
1964: Inputs: $which parameter; $domain (usually will be undef)
1965:
1966: Returns: value of designparamter $which
1967:
1968: =cut
1969:
1970: ##############################################
1971: sub designparm {
1972: my ($which,$domain)=@_;
1973: if ($ENV{'browser.blackwhite'} eq 'on') {
1974: if ($which=~/\.(font|alink|vlink|link)$/) {
1975: return '#000000';
1976: }
1977: if ($which=~/\.(pgbg|sidebg)$/) {
1978: return '#FFFFFF';
1979: }
1980: if ($which=~/\.tabbg$/) {
1981: return '#CCCCCC';
1982: }
1983: }
1984: if ($ENV{'environment.color.'.$which}) {
1985: return $ENV{'environment.color.'.$which};
1986: }
1987: $domain=&determinedomain($domain);
1988: if ($designhash{$domain.'.'.$which}) {
1989: return $designhash{$domain.'.'.$which};
1990: } else {
1991: return $designhash{'default.'.$which};
1992: }
1993: }
1994:
1995: ###############################################
1996: ###############################################
1997:
1998: =pod
1999:
2000: =back
2001:
2002: =head1 HTTP Helpers
2003:
2004: =over 4
2005:
2006: =item * &bodytag()
2007:
2008: Returns a uniform header for LON-CAPA web pages.
2009:
2010: Inputs:
2011:
2012: =over 4
2013:
2014: =item * $title, A title to be displayed on the page.
2015:
2016: =item * $function, the current role (can be undef).
2017:
2018: =item * $addentries, extra parameters for the <body> tag.
2019:
2020: =item * $bodyonly, if defined, only return the <body> tag.
2021:
2022: =item * $domain, if defined, force a given domain.
2023:
2024: =item * $forcereg, if page should register as content page (relevant for
2025: text interface only)
2026:
2027: =back
2028:
2029: Returns: A uniform header for LON-CAPA web pages.
2030: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2031: If $bodyonly is undef or zero, an html string containing a <body> tag and
2032: other decorations will be returned.
2033:
2034: =cut
2035:
2036: sub bodytag {
2037: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2038: unless ($function) {
2039: $function='student';
2040: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2041: $function='coordinator';
2042: }
2043: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2044: $function='admin';
2045: }
2046: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2047: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2048: $function='author';
2049: }
2050: }
2051: my $img=&designparm($function.'.img',$domain);
2052: my $pgbg=&designparm($function.'.pgbg',$domain);
2053: my $tabbg=&designparm($function.'.tabbg',$domain);
2054: my $font=&designparm($function.'.font',$domain);
2055: my $link=&designparm($function.'.link',$domain);
2056: my $alink=&designparm($function.'.alink',$domain);
2057: my $vlink=&designparm($function.'.vlink',$domain);
2058: my $sidebg=&designparm($function.'.sidebg',$domain);
2059: # Accessibility font enhance
2060: unless ($addentries) { $addentries=''; }
2061: if ($ENV{'browser.fontenhance'} eq 'on') {
2062: $addentries.=' style="font-size: x-large"';
2063: }
2064: # role and realm
2065: my ($role,$realm)
2066: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2067: # realm
2068: if ($ENV{'request.course.id'}) {
2069: $realm=
2070: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2071: }
2072: unless ($realm) { $realm=' '; }
2073: # Set messages
2074: my $messages=&domainlogo($domain);
2075: # Port for miniserver
2076: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2077: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2078: # construct main body tag
2079: my $bodytag = <<END;
2080: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2081: $addentries>
2082: END
2083: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2084: $lonhttpdPort.$img.'" />';
2085: if ($bodyonly) {
2086: return $bodytag;
2087: } elsif ($ENV{'browser.interface'} eq 'textual') {
2088: # Accessibility
2089: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2090: $forcereg).
2091: '<h1>LON-CAPA: '.$title.'</h1>';
2092: } elsif ($ENV{'environment.remote'} eq 'off') {
2093: # No Remote
2094: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2095: $forcereg).
2096: '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font size="+3" color="'.$font.'"><b>'.$title.
2097: '</b></font></td></tr></table>';
2098: }
2099:
2100: #
2101: # Top frame rendering, Remote is up
2102: #
2103: return(<<ENDBODY);
2104: $bodytag
2105: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2106: <tr><td bgcolor="$sidebg">
2107: $upperleft</td>
2108: <td bgcolor="$sidebg" align="right">$messages </td>
2109: </tr>
2110: <tr>
2111: <td rowspan="3" bgcolor="$tabbg">
2112: <font size="5"><b>$title</b></font>
2113: <td bgcolor="$tabbg" align="right">
2114: <font size="2">
2115: $ENV{'environment.firstname'}
2116: $ENV{'environment.middlename'}
2117: $ENV{'environment.lastname'}
2118: $ENV{'environment.generation'}
2119: </font>
2120: </td>
2121: </tr>
2122: <tr><td bgcolor="$tabbg" align="right">
2123: <font size="2">$role</font>
2124: </td></tr>
2125: <tr>
2126: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
2127: </table><br>
2128: ENDBODY
2129: }
2130:
2131: ###############################################
2132:
2133: sub get_posted_cgi {
2134: my $r=shift;
2135:
2136: my $buffer;
2137:
2138: $r->read($buffer,$r->header_in('Content-length'),0);
2139: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2140: my @pairs=split(/&/,$buffer);
2141: my $pair;
2142: foreach $pair (@pairs) {
2143: my ($name,$value) = split(/=/,$pair);
2144: $value =~ tr/+/ /;
2145: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2146: $name =~ tr/+/ /;
2147: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2148: &add_to_env("form.$name",$value);
2149: }
2150: } else {
2151: my $contentsep=$1;
2152: my @lines = split (/\n/,$buffer);
2153: my $name='';
2154: my $value='';
2155: my $fname='';
2156: my $fmime='';
2157: my $i;
2158: for ($i=0;$i<=$#lines;$i++) {
2159: if ($lines[$i]=~/^$contentsep/) {
2160: if ($name) {
2161: chomp($value);
2162: if ($fname) {
2163: $ENV{"form.$name.filename"}=$fname;
2164: $ENV{"form.$name.mimetype"}=$fmime;
2165: } else {
2166: $value=~s/\s+$//s;
2167: }
2168: &add_to_env("form.$name",$value);
2169: }
2170: if ($i<$#lines) {
2171: $i++;
2172: $lines[$i]=~
2173: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2174: $name=$1;
2175: $value='';
2176: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2177: $fname=$1;
2178: if
2179: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2180: $fmime=$1;
2181: $i++;
2182: } else {
2183: $fmime='';
2184: }
2185: } else {
2186: $fname='';
2187: $fmime='';
2188: }
2189: $i++;
2190: }
2191: } else {
2192: $value.=$lines[$i]."\n";
2193: }
2194: }
2195: }
2196: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2197: $r->method_number(M_GET);
2198: $r->method('GET');
2199: $r->headers_in->unset('Content-length');
2200: }
2201:
2202: =pod
2203:
2204: =item * get_unprocessed_cgi($query,$possible_names)
2205:
2206: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2207: $query. The parameters listed in $possible_names (an array reference),
2208: will be set in $ENV{'form.name'} if they do not already exist.
2209:
2210: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2211: $possible_names is an ref to an array of form element names. As an example:
2212: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2213: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2214:
2215: =cut
2216:
2217: sub get_unprocessed_cgi {
2218: my ($query,$possible_names)= @_;
2219: # $Apache::lonxml::debug=1;
2220: foreach (split(/&/,$query)) {
2221: my ($name, $value) = split(/=/,$_);
2222: $name = &Apache::lonnet::unescape($name);
2223: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2224: $value =~ tr/+/ /;
2225: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2226: &Apache::lonxml::debug("Seting :$name: to :$value:");
2227: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2228: }
2229: }
2230: }
2231:
2232: =pod
2233:
2234: =item * cacheheader()
2235:
2236: returns cache-controlling header code
2237:
2238: =cut
2239:
2240: sub cacheheader {
2241: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2242: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2243: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2244: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2245: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2246: return $output;
2247: }
2248:
2249: =pod
2250:
2251: =item * no_cache($r)
2252:
2253: specifies header code to not have cache
2254:
2255: =cut
2256:
2257: sub no_cache {
2258: my ($r) = @_;
2259: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2260: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2261: $r->no_cache(1);
2262: $r->header_out("Pragma" => "no-cache");
2263: #$r->header_out("Expires" => $date);
2264: }
2265:
2266: =pod
2267:
2268: =item * add_to_env($name,$value)
2269:
2270: adds $name to the %ENV hash with value
2271: $value, if $name already exists, the entry is converted to an array
2272: reference and $value is added to the array.
2273:
2274: =cut
2275:
2276: sub add_to_env {
2277: my ($name,$value)=@_;
2278: if (defined($ENV{$name})) {
2279: if (ref($ENV{$name})) {
2280: #already have multiple values
2281: push(@{ $ENV{$name} },$value);
2282: } else {
2283: #first time seeing multiple values, convert hash entry to an arrayref
2284: my $first=$ENV{$name};
2285: undef($ENV{$name});
2286: push(@{ $ENV{$name} },$first,$value);
2287: }
2288: } else {
2289: $ENV{$name}=$value;
2290: }
2291: }
2292:
2293: =pod
2294:
2295: =back
2296:
2297: =head1 CSV Upload/Handling functions
2298:
2299: =over 4
2300:
2301: =item * upfile_store($r)
2302:
2303: Store uploaded file, $r should be the HTTP Request object,
2304: needs $ENV{'form.upfile'}
2305: returns $datatoken to be put into hidden field
2306:
2307: =cut
2308:
2309: sub upfile_store {
2310: my $r=shift;
2311: $ENV{'form.upfile'}=~s/\r/\n/gs;
2312: $ENV{'form.upfile'}=~s/\f/\n/gs;
2313: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2314: $ENV{'form.upfile'}=~s/\n+$//gs;
2315:
2316: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2317: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2318: {
2319: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
2320: '/tmp/'.$datatoken.'.tmp');
2321: print $fh $ENV{'form.upfile'};
2322: }
2323: return $datatoken;
2324: }
2325:
2326: =pod
2327:
2328: =item * load_tmp_file($r)
2329:
2330: Load uploaded file from tmp, $r should be the HTTP Request object,
2331: needs $ENV{'form.datatoken'},
2332: sets $ENV{'form.upfile'} to the contents of the file
2333:
2334: =cut
2335:
2336: sub load_tmp_file {
2337: my $r=shift;
2338: my @studentdata=();
2339: {
2340: my $fh;
2341: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
2342: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
2343: @studentdata=<$fh>;
2344: }
2345: }
2346: $ENV{'form.upfile'}=join('',@studentdata);
2347: }
2348:
2349: =pod
2350:
2351: =item * upfile_record_sep()
2352:
2353: Separate uploaded file into records
2354: returns array of records,
2355: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2356:
2357: =cut
2358:
2359: sub upfile_record_sep {
2360: if ($ENV{'form.upfiletype'} eq 'xml') {
2361: } else {
2362: return split(/\n/,$ENV{'form.upfile'});
2363: }
2364: }
2365:
2366: =pod
2367:
2368: =item * record_sep($record)
2369:
2370: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2371:
2372: =cut
2373:
2374: sub record_sep {
2375: my $record=shift;
2376: my %components=();
2377: if ($ENV{'form.upfiletype'} eq 'xml') {
2378: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2379: my $i=0;
2380: foreach (split(/\s+/,$record)) {
2381: my $field=$_;
2382: $field=~s/^(\"|\')//;
2383: $field=~s/(\"|\')$//;
2384: $components{$i}=$field;
2385: $i++;
2386: }
2387: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2388: my $i=0;
2389: foreach (split(/\t+/,$record)) {
2390: my $field=$_;
2391: $field=~s/^(\"|\')//;
2392: $field=~s/(\"|\')$//;
2393: $components{$i}=$field;
2394: $i++;
2395: }
2396: } else {
2397: my @allfields=split(/\,/,$record);
2398: my $i=0;
2399: my $j;
2400: for ($j=0;$j<=$#allfields;$j++) {
2401: my $field=$allfields[$j];
2402: if ($field=~/^\s*(\"|\')/) {
2403: my $delimiter=$1;
2404: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2405: $j++;
2406: $field.=','.$allfields[$j];
2407: }
2408: $field=~s/^\s*$delimiter//;
2409: $field=~s/$delimiter\s*$//;
2410: }
2411: $components{$i}=$field;
2412: $i++;
2413: }
2414: }
2415: return %components;
2416: }
2417:
2418: =pod
2419:
2420: =item * upfile_select_html()
2421:
2422: return HTML code to select file and specify its type
2423:
2424: =cut
2425:
2426: sub upfile_select_html {
2427: return (<<'ENDUPFORM');
2428: <input type="file" name="upfile" size="50" />
2429: <br />Type: <select name="upfiletype">
2430: <option value="csv">CSV (comma separated values, spreadsheet)</option>
2431: <option value="space">Space separated</option>
2432: <option value="tab">Tabulator separated</option>
2433: <option value="xml">HTML/XML</option>
2434: </select>
2435: ENDUPFORM
2436: }
2437:
2438: =pod
2439:
2440: =item * csv_print_samples($r,$records)
2441:
2442: Prints a table of sample values from each column uploaded $r is an
2443: Apache Request ref, $records is an arrayref from
2444: &Apache::loncommon::upfile_record_sep
2445:
2446: =cut
2447:
2448: sub csv_print_samples {
2449: my ($r,$records) = @_;
2450: my (%sone,%stwo,%sthree);
2451: %sone=&record_sep($$records[0]);
2452: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2453: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2454:
2455: $r->print('Samples<br /><table border="2"><tr>');
2456: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
2457: $r->print('</tr>');
2458: foreach my $hash (\%sone,\%stwo,\%sthree) {
2459: $r->print('<tr>');
2460: foreach (sort({$a <=> $b} keys(%sone))) {
2461: $r->print('<td>');
2462: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2463: $r->print('</td>');
2464: }
2465: $r->print('</tr>');
2466: }
2467: $r->print('</tr></table><br />'."\n");
2468: }
2469:
2470: =pod
2471:
2472: =item * csv_print_select_table($r,$records,$d)
2473:
2474: Prints a table to create associations between values and table columns.
2475: $r is an Apache Request ref,
2476: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2477: $d is an array of 2 element arrays (internal name, displayed name)
2478:
2479: =cut
2480:
2481: sub csv_print_select_table {
2482: my ($r,$records,$d) = @_;
2483: my $i=0;my %sone;
2484: %sone=&record_sep($$records[0]);
2485: $r->print('Associate columns with student attributes.'."\n".
2486: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
2487: foreach (@$d) {
2488: my ($value,$display)=@{ $_ };
2489: $r->print('<tr><td>'.$display.'</td>');
2490:
2491: $r->print('<td><select name=f'.$i.
2492: ' onchange="javascript:flip(this.form,'.$i.');">');
2493: $r->print('<option value="none"></option>');
2494: foreach (sort({$a <=> $b} keys(%sone))) {
2495: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2496: }
2497: $r->print('</select></td></tr>'."\n");
2498: $i++;
2499: }
2500: $i--;
2501: return $i;
2502: }
2503:
2504: =pod
2505:
2506: =item * csv_samples_select_table($r,$records,$d)
2507:
2508: Prints a table of sample values from the upload and can make associate samples to internal names.
2509:
2510: $r is an Apache Request ref,
2511: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2512: $d is an array of 2 element arrays (internal name, displayed name)
2513:
2514: =cut
2515:
2516: sub csv_samples_select_table {
2517: my ($r,$records,$d) = @_;
2518: my %sone; my %stwo; my %sthree;
2519: my $i=0;
2520:
2521: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
2522: %sone=&record_sep($$records[0]);
2523: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2524: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2525:
2526: foreach (sort keys %sone) {
2527: $r->print('<tr><td><select name=f'.$i.
2528: ' onchange="javascript:flip(this.form,'.$i.');">');
2529: foreach (@$d) {
2530: my ($value,$display)=@{ $_ };
2531: $r->print('<option value='.$value.'>'.$display.'</option>');
2532: }
2533: $r->print('</select></td><td>');
2534: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2535: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2536: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2537: $r->print('</td></tr>');
2538: $i++;
2539: }
2540: $i--;
2541: return($i);
2542: }
2543:
2544: =pod
2545:
2546: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2547:
2548: Returns either 1 or undef
2549:
2550: 1 if the part is to be hidden, undef if it is to be shown
2551:
2552: Arguments are:
2553:
2554: $id the id of the part to be checked
2555: $symb, optional the symb of the resource to check
2556: $udom, optional the domain of the user to check for
2557: $uname, optional the username of the user to check for
2558:
2559: =cut
2560:
2561: sub check_if_partid_hidden {
2562: my ($id,$symb,$udom,$uname) = @_;
2563: my $hiddenparts=&Apache::lonnet::EXT('resource.0.parameter_hiddenparts',
2564: $symb,$udom,$uname);
2565: my @hiddenlist=split(/,/,$hiddenparts);
2566: foreach my $checkid (@hiddenlist) {
2567: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return 1; }
2568: }
2569: return undef;
2570: }
2571:
2572: =pod
2573:
2574: =back
2575:
2576: =cut
2577:
2578: 1;
2579: __END__;
2580:
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