1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.143 2003/11/04 21:21:35 matthew 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: use Apache::lonlocal;
72: use HTML::Entities;
73:
74: my $readit;
75:
76: =pod
77:
78: =head1 Global Variables
79:
80: =cut
81:
82: # ----------------------------------------------- Filetypes/Languages/Copyright
83: my %language;
84: my %supported_language;
85: my %cprtag;
86: my %fe; my %fd;
87: my %category_extensions;
88:
89: # ---------------------------------------------- Designs
90:
91: my %designhash;
92:
93: # ---------------------------------------------- Thesaurus variables
94:
95: # FIXME: I don't think it's necessary to document these things;
96: # they're privately used - Jeremy
97:
98: =pod
99:
100: =over 4
101:
102: =item * %Keywords
103:
104: A hash used by &keyword to determine if a word is considered a keyword.
105:
106: =item * $thesaurus_db_file
107:
108: Scalar containing the full path to the thesaurus database.
109:
110: =back
111:
112: =cut
113:
114: my %Keywords;
115: my $thesaurus_db_file;
116:
117: # ----------------------------------------------------------------------- BEGIN
118:
119: # FIXME: I don't think this needs to be documented, it prepares
120: # private data structures - Jeremy
121: =pod
122:
123: =head1 General Subroutines
124:
125: =over 4
126:
127: =item * BEGIN()
128:
129: Initialize values from language.tab, copyright.tab, filetypes.tab,
130: thesaurus.tab, and filecategories.tab.
131:
132: =back
133:
134: =cut
135:
136: # ----------------------------------------------------------------------- BEGIN
137:
138: BEGIN {
139: # Variable initialization
140: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
141: #
142: unless ($readit) {
143: # ------------------------------------------------------------------- languages
144: {
145: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
146: '/language.tab');
147: if ($fh) {
148: while (<$fh>) {
149: next if /^\#/;
150: chomp;
151: my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
152: $language{$key}=$val.' - '.$enc;
153: if ($sup) {
154: $supported_language{$key}=$sup;
155: }
156: }
157: }
158: }
159: # ------------------------------------------------------------------ copyrights
160: {
161: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
162: '/copyright.tab');
163: if ($fh) {
164: while (<$fh>) {
165: next if /^\#/;
166: chomp;
167: my ($key,$val)=(split(/\s+/,$_,2));
168: $cprtag{$key}=$val;
169: }
170: }
171: }
172:
173: # -------------------------------------------------------------- domain designs
174:
175: my $filename;
176: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
177: opendir(DIR,$designdir);
178: while ($filename=readdir(DIR)) {
179: my ($domain)=($filename=~/^(\w+)\./);
180: {
181: my $fh=Apache::File->new($designdir.'/'.$filename);
182: if ($fh) {
183: while (<$fh>) {
184: next if /^\#/;
185: chomp;
186: my ($key,$val)=(split(/\=/,$_));
187: if ($val) { $designhash{$domain.'.'.$key}=$val; }
188: }
189: }
190: }
191:
192: }
193: closedir(DIR);
194:
195:
196: # ------------------------------------------------------------- file categories
197: {
198: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
199: '/filecategories.tab');
200: if ($fh) {
201: while (<$fh>) {
202: next if /^\#/;
203: chomp;
204: my ($extension,$category)=(split(/\s+/,$_,2));
205: push @{$category_extensions{lc($category)}},$extension;
206: }
207: }
208: }
209: # ------------------------------------------------------------------ file types
210: {
211: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
212: '/filetypes.tab');
213: if ($fh) {
214: while (<$fh>) {
215: next if (/^\#/);
216: chomp;
217: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
218: if ($descr ne '') {
219: $fe{$ending}=lc($emb);
220: $fd{$ending}=$descr;
221: }
222: }
223: }
224: }
225: &Apache::lonnet::logthis(
226: "<font color=yellow>INFO: Read file types</font>");
227: $readit=1;
228: } # end of unless($readit)
229:
230: }
231:
232: ###############################################################
233: ## HTML and Javascript Helper Functions ##
234: ###############################################################
235:
236: =pod
237:
238: =head1 HTML and Javascript Functions
239:
240: =over 4
241:
242: =item * browser_and_searcher_javascript ()
243:
244: X<browsing, javascript>X<searching, javascript>Returns a string
245: containing javascript with two functions, C<openbrowser> and
246: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
247: tags.
248:
249: =over 4
250:
251: =item * openbrowser(formname,elementname,only,omit) [javascript]
252:
253: inputs: formname, elementname, only, omit
254:
255: formname and elementname indicate the name of the html form and name of
256: the element that the results of the browsing selection are to be placed in.
257:
258: Specifying 'only' will restrict the browser to displaying only files
259: with the given extension. Can be a comma seperated list.
260:
261: Specifying 'omit' will restrict the browser to NOT displaying files
262: with the given extension. Can be a comma seperated list.
263:
264: =item * opensearcher(formname, elementname) [javascript]
265:
266: Inputs: formname, elementname
267:
268: formname and elementname specify the name of the html form and the name
269: of the element the selection from the search results will be placed in.
270:
271: =back
272:
273: =cut
274:
275: sub browser_and_searcher_javascript {
276: return <<END;
277: var editbrowser = null;
278: function openbrowser(formname,elementname,only,omit,titleelement) {
279: var url = '/res/?';
280: if (editbrowser == null) {
281: url += 'launch=1&';
282: }
283: url += 'catalogmode=interactive&';
284: url += 'mode=edit&';
285: url += 'form=' + formname + '&';
286: if (only != null) {
287: url += 'only=' + only + '&';
288: }
289: if (omit != null) {
290: url += 'omit=' + omit + '&';
291: }
292: if (titleelement != null) {
293: url += 'titleelement=' + titleelement + '&';
294: }
295: url += 'element=' + elementname + '';
296: var title = 'Browser';
297: var options = 'scrollbars=1,resizable=1,menubar=0';
298: options += ',width=700,height=600';
299: editbrowser = open(url,title,options,'1');
300: editbrowser.focus();
301: }
302: var editsearcher;
303: function opensearcher(formname,elementname,titleelement) {
304: var url = '/adm/searchcat?';
305: if (editsearcher == null) {
306: url += 'launch=1&';
307: }
308: url += 'catalogmode=interactive&';
309: url += 'mode=edit&';
310: url += 'form=' + formname + '&';
311: if (titleelement != null) {
312: url += 'titleelement=' + titleelement + '&';
313: }
314: url += 'element=' + elementname + '';
315: var title = 'Search';
316: var options = 'scrollbars=1,resizable=1,menubar=0';
317: options += ',width=700,height=600';
318: editsearcher = open(url,title,options,'1');
319: editsearcher.focus();
320: }
321: END
322: }
323:
324: sub studentbrowser_javascript {
325: unless (
326: (($ENV{'request.course.id'}) &&
327: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
328: || ($ENV{'request.role'}=~/^(au|dc|su)/)
329: ) { return ''; }
330: return (<<'ENDSTDBRW');
331: <script type="text/javascript" language="Javascript" >
332: var stdeditbrowser;
333: function openstdbrowser(formname,uname,udom,roleflag) {
334: var url = '/adm/pickstudent?';
335: var filter;
336: eval('filter=document.'+formname+'.'+uname+'.value;');
337: if (filter != null) {
338: if (filter != '') {
339: url += 'filter='+filter+'&';
340: }
341: }
342: url += 'form=' + formname + '&unameelement='+uname+
343: '&udomelement='+udom;
344: if (roleflag) { url+="&roles=1"; }
345: var title = 'Student_Browser';
346: var options = 'scrollbars=1,resizable=1,menubar=0';
347: options += ',width=700,height=600';
348: stdeditbrowser = open(url,title,options,'1');
349: stdeditbrowser.focus();
350: }
351: </script>
352: ENDSTDBRW
353: }
354:
355: sub selectstudent_link {
356: my ($form,$unameele,$udomele)=@_;
357: if ($ENV{'request.course.id'}) {
358: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
359: return '';
360: }
361: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
362: '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
363: }
364: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
365: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
366: '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
367: }
368: return '';
369: }
370:
371: sub coursebrowser_javascript {
372: my ($domainfilter)=@_;
373: return (<<ENDSTDBRW);
374: <script type="text/javascript" language="Javascript" >
375: var stdeditbrowser;
376: function opencrsbrowser(formname,uname,udom) {
377: var url = '/adm/pickcourse?';
378: var filter;
379: if (filter != null) {
380: if (filter != '') {
381: url += 'filter='+filter+'&';
382: }
383: }
384: var domainfilter='$domainfilter';
385: if (domainfilter != null) {
386: if (domainfilter != '') {
387: url += 'domainfilter='+domainfilter+'&';
388: }
389: }
390: url += 'form=' + formname + '&cnumelement='+uname+
391: '&cdomelement='+udom;
392: var title = 'Course_Browser';
393: var options = 'scrollbars=1,resizable=1,menubar=0';
394: options += ',width=700,height=600';
395: stdeditbrowser = open(url,title,options,'1');
396: stdeditbrowser.focus();
397: }
398: </script>
399: ENDSTDBRW
400: }
401:
402: sub selectcourse_link {
403: my ($form,$unameele,$udomele)=@_;
404: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
405: '","'.$udomele.'");'."'>".&mt('Select Course')."</a>";
406: }
407:
408: =pod
409:
410: =item * linked_select_forms(...)
411:
412: linked_select_forms returns a string containing a <script></script> block
413: and html for two <select> menus. The select menus will be linked in that
414: changing the value of the first menu will result in new values being placed
415: in the second menu. The values in the select menu will appear in alphabetical
416: order.
417:
418: linked_select_forms takes the following ordered inputs:
419:
420: =over 4
421:
422: =item * $formname, the name of the <form> tag
423:
424: =item * $middletext, the text which appears between the <select> tags
425:
426: =item * $firstdefault, the default value for the first menu
427:
428: =item * $firstselectname, the name of the first <select> tag
429:
430: =item * $secondselectname, the name of the second <select> tag
431:
432: =item * $hashref, a reference to a hash containing the data for the menus.
433:
434: =back
435:
436: Below is an example of such a hash. Only the 'text', 'default', and
437: 'select2' keys must appear as stated. keys(%menu) are the possible
438: values for the first select menu. The text that coincides with the
439: first menu value is given in $menu{$choice1}->{'text'}. The values
440: and text for the second menu are given in the hash pointed to by
441: $menu{$choice1}->{'select2'}.
442:
443: my %menu = ( A1 => { text =>"Choice A1" ,
444: default => "B3",
445: select2 => {
446: B1 => "Choice B1",
447: B2 => "Choice B2",
448: B3 => "Choice B3",
449: B4 => "Choice B4"
450: }
451: },
452: A2 => { text =>"Choice A2" ,
453: default => "C2",
454: select2 => {
455: C1 => "Choice C1",
456: C2 => "Choice C2",
457: C3 => "Choice C3"
458: }
459: },
460: A3 => { text =>"Choice A3" ,
461: default => "D6",
462: select2 => {
463: D1 => "Choice D1",
464: D2 => "Choice D2",
465: D3 => "Choice D3",
466: D4 => "Choice D4",
467: D5 => "Choice D5",
468: D6 => "Choice D6",
469: D7 => "Choice D7"
470: }
471: }
472: );
473:
474: =cut
475:
476: sub linked_select_forms {
477: my ($formname,
478: $middletext,
479: $firstdefault,
480: $firstselectname,
481: $secondselectname,
482: $hashref
483: ) = @_;
484: my $second = "document.$formname.$secondselectname";
485: my $first = "document.$formname.$firstselectname";
486: # output the javascript to do the changing
487: my $result = '';
488: $result.="<script>\n";
489: $result.="var select2data = new Object();\n";
490: $" = '","';
491: my $debug = '';
492: foreach my $s1 (sort(keys(%$hashref))) {
493: $result.="select2data.d_$s1 = new Object();\n";
494: $result.="select2data.d_$s1.def = new String('".
495: $hashref->{$s1}->{'default'}."');\n";
496: $result.="select2data.d_$s1.values = new Array(";
497: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
498: $result.="\"@s2values\");\n";
499: $result.="select2data.d_$s1.texts = new Array(";
500: my @s2texts;
501: foreach my $value (@s2values) {
502: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
503: }
504: $result.="\"@s2texts\");\n";
505: }
506: $"=' ';
507: $result.= <<"END";
508:
509: function select1_changed() {
510: // Determine new choice
511: var newvalue = "d_" + $first.value;
512: // update select2
513: var values = select2data[newvalue].values;
514: var texts = select2data[newvalue].texts;
515: var select2def = select2data[newvalue].def;
516: var i;
517: // out with the old
518: for (i = 0; i < $second.options.length; i++) {
519: $second.options[i] = null;
520: }
521: // in with the nuclear
522: for (i=0;i<values.length; i++) {
523: $second.options[i] = new Option(values[i]);
524: $second.options[i].value = values[i];
525: $second.options[i].text = texts[i];
526: if (values[i] == select2def) {
527: $second.options[i].selected = true;
528: }
529: }
530: }
531: </script>
532: END
533: # output the initial values for the selection lists
534: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
535: foreach my $value (sort(keys(%$hashref))) {
536: $result.=" <option value=\"$value\" ";
537: $result.=" selected=\"true\" " if ($value eq $firstdefault);
538: $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
539: }
540: $result .= "</select>\n";
541: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
542: $result .= $middletext;
543: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
544: my $seconddefault = $hashref->{$firstdefault}->{'default'};
545: foreach my $value (sort(keys(%select2))) {
546: $result.=" <option value=\"$value\" ";
547: $result.=" selected=\"true\" " if ($value eq $seconddefault);
548: $result.=">".&mt($select2{$value})."</option>\n";
549: }
550: $result .= "</select>\n";
551: # return $debug;
552: return $result;
553: } # end of sub linked_select_forms {
554:
555: =pod
556:
557: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
558:
559: Returns a string corresponding to an HTML link to the given help
560: $topic, where $topic corresponds to the name of a .tex file in
561: /home/httpd/html/adm/help/tex, with underscores replaced by
562: spaces.
563:
564: $text will optionally be linked to the same topic, allowing you to
565: link text in addition to the graphic. If you do not want to link
566: text, but wish to specify one of the later parameters, pass an
567: empty string.
568:
569: $stayOnPage is a value that will be interpreted as a boolean. If true,
570: the link will not open a new window. If false, the link will open
571: a new window using Javascript. (Default is false.)
572:
573: $width and $height are optional numerical parameters that will
574: override the width and height of the popped up window, which may
575: be useful for certain help topics with big pictures included.
576:
577: =cut
578:
579: sub help_open_topic {
580: my ($topic, $text, $stayOnPage, $width, $height) = @_;
581: $text = "" if (not defined $text);
582: $stayOnPage = 0 if (not defined $stayOnPage);
583: if ($ENV{'browser.interface'} eq 'textual' ||
584: $ENV{'environment.remote'} eq 'off' ) {
585: $stayOnPage=1;
586: }
587: $width = 350 if (not defined $width);
588: $height = 400 if (not defined $height);
589: my $filename = $topic;
590: $filename =~ s/ /_/g;
591:
592: my $template = "";
593: my $link;
594:
595: if (!$stayOnPage)
596: {
597: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
598: }
599: else
600: {
601: $link = "/adm/help/${filename}.hlp";
602: }
603:
604: # Add the text
605: if ($text ne "")
606: {
607: $template .=
608: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
609: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
610: }
611:
612: # Add the graphic
613: $template .= <<"ENDTEMPLATE";
614: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
615: ENDTEMPLATE
616: if ($text ne '') { $template.='</td></tr></table>' };
617: return $template;
618:
619: }
620:
621: # This is a quicky function for Latex cheatsheet editing, since it
622: # appears in at least four places
623: sub helpLatexCheatsheet {
624: my $other = shift;
625: my $addOther = '';
626: if ($other) {
627: $addOther = Apache::loncommon::help_open_topic($other, shift,
628: undef, undef, 600) .
629: '</td><td>';
630: }
631: return '<table><tr><td>'.
632: $addOther .
633: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
634: undef,undef,600)
635: .'</td><td>'.
636: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
637: undef,undef,600)
638: .'</td></tr></table>';
639: }
640:
641: =pod
642:
643: =item * csv_translate($text)
644:
645: Translate $text to allow it to be output as a 'comma seperated values'
646: format.
647:
648: =cut
649:
650: sub csv_translate {
651: my $text = shift;
652: $text =~ s/\"/\"\"/g;
653: $text =~ s/\n//g;
654: return $text;
655: }
656:
657: =pod
658:
659: =item * change_content_javascript():
660:
661: This and the next function allow you to create small sections of an
662: otherwise static HTML page that you can update on the fly with
663: Javascript, even in Netscape 4.
664:
665: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
666: must be written to the HTML page once. It will prove the Javascript
667: function "change(name, content)". Calling the change function with the
668: name of the section
669: you want to update, matching the name passed to C<changable_area>, and
670: the new content you want to put in there, will put the content into
671: that area.
672:
673: B<Note>: Netscape 4 only reserves enough space for the changable area
674: to contain room for the original contents. You need to "make space"
675: for whatever changes you wish to make, and be B<sure> to check your
676: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
677: it's adequate for updating a one-line status display, but little more.
678: This script will set the space to 100% width, so you only need to
679: worry about height in Netscape 4.
680:
681: Modern browsers are much less limiting, and if you can commit to the
682: user not using Netscape 4, this feature may be used freely with
683: pretty much any HTML.
684:
685: =cut
686:
687: sub change_content_javascript {
688: # If we're on Netscape 4, we need to use Layer-based code
689: if ($ENV{'browser.type'} eq 'netscape' &&
690: $ENV{'browser.version'} =~ /^4\./) {
691: return (<<NETSCAPE4);
692: function change(name, content) {
693: doc = document.layers[name+"___escape"].layers[0].document;
694: doc.open();
695: doc.write(content);
696: doc.close();
697: }
698: NETSCAPE4
699: } else {
700: # Otherwise, we need to use semi-standards-compliant code
701: # (technically, "innerHTML" isn't standard but the equivalent
702: # is really scary, and every useful browser supports it
703: return (<<DOMBASED);
704: function change(name, content) {
705: element = document.getElementById(name);
706: element.innerHTML = content;
707: }
708: DOMBASED
709: }
710: }
711:
712: =pod
713:
714: =item * changable_area($name, $origContent):
715:
716: This provides a "changable area" that can be modified on the fly via
717: the Javascript code provided in C<change_content_javascript>. $name is
718: the name you will use to reference the area later; do not repeat the
719: same name on a given HTML page more then once. $origContent is what
720: the area will originally contain, which can be left blank.
721:
722: =cut
723:
724: sub changable_area {
725: my ($name, $origContent) = @_;
726:
727: if ($ENV{'browser.type'} eq 'netscape' &&
728: $ENV{'browser.version'} =~ /^4\./) {
729: # If this is netscape 4, we need to use the Layer tag
730: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
731: } else {
732: return "<span id='$name'>$origContent</span>";
733: }
734: }
735:
736: =pod
737:
738: =back
739:
740: =cut
741:
742: ###############################################################
743: ## Home server <option> list generating code ##
744: ###############################################################
745:
746: =pod
747:
748: =head1 Home Server option list generating code
749:
750: =over 4
751:
752: =item * get_domains()
753:
754: Returns an array containing each of the domains listed in the hosts.tab
755: file.
756:
757: =cut
758:
759: #-------------------------------------------
760: sub get_domains {
761: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
762: my @domains;
763: my %seen;
764: foreach (sort values(%Apache::lonnet::hostdom)) {
765: push (@domains,$_) unless $seen{$_}++;
766: }
767: return @domains;
768: }
769:
770: #-------------------------------------------
771:
772: =pod
773:
774: =item * select_form($defdom,$name,%hash)
775:
776: Returns a string containing a <select name='$name' size='1'> form to
777: allow a user to select options from a hash option_name => displayed text.
778: See lonrights.pm for an example invocation and use.
779:
780: =cut
781:
782: #-------------------------------------------
783: sub select_form {
784: my ($def,$name,%hash) = @_;
785: my $selectform = "<select name=\"$name\" size=\"1\">\n";
786: my @keys;
787: if (exists($hash{'select_form_order'})) {
788: @keys=@{$hash{'select_form_order'}};
789: } else {
790: @keys=sort(keys(%hash));
791: }
792: foreach (@keys) {
793: $selectform.="<option value=\"$_\" ".
794: ($_ eq $def ? 'selected' : '').
795: ">".&mt($hash{$_})."</option>\n";
796: }
797: $selectform.="</select>";
798: return $selectform;
799: }
800:
801:
802: #-------------------------------------------
803:
804: =pod
805:
806: =item * select_dom_form($defdom,$name,$includeempty)
807:
808: Returns a string containing a <select name='$name' size='1'> form to
809: allow a user to select the domain to preform an operation in.
810: See loncreateuser.pm for an example invocation and use.
811:
812: If the $includeempty flag is set, it also includes an empty choice ("no domain
813: selected");
814:
815: =cut
816:
817: #-------------------------------------------
818: sub select_dom_form {
819: my ($defdom,$name,$includeempty) = @_;
820: my @domains = get_domains();
821: if ($includeempty) { @domains=('',@domains); }
822: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
823: foreach (@domains) {
824: $selectdomain.="<option value=\"$_\" ".
825: ($_ eq $defdom ? 'selected' : '').
826: ">$_</option>\n";
827: }
828: $selectdomain.="</select>";
829: return $selectdomain;
830: }
831:
832: #-------------------------------------------
833:
834: =pod
835:
836: =item * get_library_servers($domain)
837:
838: Returns a hash which contains keys like '103l3' and values like
839: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
840: given $domain.
841:
842: =cut
843:
844: #-------------------------------------------
845: sub get_library_servers {
846: my $domain = shift;
847: my %library_servers;
848: foreach (keys(%Apache::lonnet::libserv)) {
849: if ($Apache::lonnet::hostdom{$_} eq $domain) {
850: $library_servers{$_} = $Apache::lonnet::hostname{$_};
851: }
852: }
853: return %library_servers;
854: }
855:
856: #-------------------------------------------
857:
858: =pod
859:
860: =item * home_server_option_list($domain)
861:
862: returns a string which contains an <option> list to be used in a
863: <select> form input. See loncreateuser.pm for an example.
864:
865: =cut
866:
867: #-------------------------------------------
868: sub home_server_option_list {
869: my $domain = shift;
870: my %servers = &get_library_servers($domain);
871: my $result = '';
872: foreach (sort keys(%servers)) {
873: $result.=
874: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
875: }
876: return $result;
877: }
878:
879: =pod
880:
881: =back
882:
883: =cut
884:
885: ###############################################################
886: ## Decoding User Agent ##
887: ###############################################################
888:
889: =pod
890:
891: =head1 Decoding the User Agent
892:
893: =over 4
894:
895: =item * &decode_user_agent()
896:
897: Inputs: $r
898:
899: Outputs:
900:
901: =over 4
902:
903: =item * $httpbrowser
904:
905: =item * $clientbrowser
906:
907: =item * $clientversion
908:
909: =item * $clientmathml
910:
911: =item * $clientunicode
912:
913: =item * $clientos
914:
915: =back
916:
917: =cut
918:
919: ###############################################################
920: ###############################################################
921: sub decode_user_agent {
922: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
923: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
924: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
925: my $clientbrowser='unknown';
926: my $clientversion='0';
927: my $clientmathml='';
928: my $clientunicode='0';
929: for (my $i=0;$i<=$#browsertype;$i++) {
930: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
931: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
932: $clientbrowser=$bname;
933: $httpbrowser=~/$vreg/i;
934: $clientversion=$1;
935: $clientmathml=($clientversion>=$minv);
936: $clientunicode=($clientversion>=$univ);
937: }
938: }
939: my $clientos='unknown';
940: if (($httpbrowser=~/linux/i) ||
941: ($httpbrowser=~/unix/i) ||
942: ($httpbrowser=~/ux/i) ||
943: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
944: if (($httpbrowser=~/vax/i) ||
945: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
946: if ($httpbrowser=~/next/i) { $clientos='next'; }
947: if (($httpbrowser=~/mac/i) ||
948: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
949: if ($httpbrowser=~/win/i) { $clientos='win'; }
950: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
951: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
952: $clientunicode,$clientos,);
953: }
954:
955: =pod
956:
957: =back
958:
959: =cut
960:
961: ###############################################################
962: ## Authentication changing form generation subroutines ##
963: ###############################################################
964: ##
965: ## All of the authform_xxxxxxx subroutines take their inputs in a
966: ## hash, and have reasonable default values.
967: ##
968: ## formname = the name given in the <form> tag.
969: #-------------------------------------------
970:
971: =pod
972:
973: =head1 Authentication Routines
974:
975: =over 4
976:
977: =item * authform_xxxxxx
978:
979: The authform_xxxxxx subroutines provide javascript and html forms which
980: handle some of the conveniences required for authentication forms.
981: This is not an optimal method, but it works.
982:
983: See loncreateuser.pm for invocation and use examples.
984:
985: =over 4
986:
987: =item * authform_header
988:
989: =item * authform_authorwarning
990:
991: =item * authform_nochange
992:
993: =item * authform_kerberos
994:
995: =item * authform_internal
996:
997: =item * authform_filesystem
998:
999: =back
1000:
1001: =cut
1002:
1003: #-------------------------------------------
1004: sub authform_header{
1005: my %in = (
1006: formname => 'cu',
1007: kerb_def_dom => '',
1008: @_,
1009: );
1010: $in{'formname'} = 'document.' . $in{'formname'};
1011: my $result='';
1012:
1013: #---------------------------------------------- Code for upper case translation
1014: my $Javascript_toUpperCase;
1015: unless ($in{kerb_def_dom}) {
1016: $Javascript_toUpperCase =<<"END";
1017: switch (choice) {
1018: case 'krb': currentform.elements[choicearg].value =
1019: currentform.elements[choicearg].value.toUpperCase();
1020: break;
1021: default:
1022: }
1023: END
1024: } else {
1025: $Javascript_toUpperCase = "";
1026: }
1027:
1028: $result.=<<"END";
1029: var current = new Object();
1030: current.radiovalue = 'nochange';
1031: current.argfield = null;
1032:
1033: function changed_radio(choice,currentform) {
1034: var choicearg = choice + 'arg';
1035: // If a radio button in changed, we need to change the argfield
1036: if (current.radiovalue != choice) {
1037: current.radiovalue = choice;
1038: if (current.argfield != null) {
1039: currentform.elements[current.argfield].value = '';
1040: }
1041: if (choice == 'nochange') {
1042: current.argfield = null;
1043: } else {
1044: current.argfield = choicearg;
1045: switch(choice) {
1046: case 'krb':
1047: currentform.elements[current.argfield].value =
1048: "$in{'kerb_def_dom'}";
1049: break;
1050: default:
1051: break;
1052: }
1053: }
1054: }
1055: return;
1056: }
1057:
1058: function changed_text(choice,currentform) {
1059: var choicearg = choice + 'arg';
1060: if (currentform.elements[choicearg].value !='') {
1061: $Javascript_toUpperCase
1062: // clear old field
1063: if ((current.argfield != choicearg) && (current.argfield != null)) {
1064: currentform.elements[current.argfield].value = '';
1065: }
1066: current.argfield = choicearg;
1067: }
1068: set_auth_radio_buttons(choice,currentform);
1069: return;
1070: }
1071:
1072: function set_auth_radio_buttons(newvalue,currentform) {
1073: var i=0;
1074: while (i < currentform.login.length) {
1075: if (currentform.login[i].value == newvalue) { break; }
1076: i++;
1077: }
1078: if (i == currentform.login.length) {
1079: return;
1080: }
1081: current.radiovalue = newvalue;
1082: currentform.login[i].checked = true;
1083: return;
1084: }
1085: END
1086: return $result;
1087: }
1088:
1089: sub authform_authorwarning{
1090: my $result='';
1091: $result=<<"END";
1092: <i>As a general rule, only authors or co-authors should be filesystem
1093: authenticated (which allows access to the server filesystem).</i>
1094: END
1095: return $result;
1096: }
1097:
1098: sub authform_nochange{
1099: my %in = (
1100: formname => 'document.cu',
1101: kerb_def_dom => 'MSU.EDU',
1102: @_,
1103: );
1104: my $result='';
1105: $result.=<<"END";
1106: <input type="radio" name="login" value="nochange" checked="checked"
1107: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
1108: Do not change login data
1109: END
1110: return $result;
1111: }
1112:
1113: sub authform_kerberos{
1114: my %in = (
1115: formname => 'document.cu',
1116: kerb_def_dom => 'MSU.EDU',
1117: kerb_def_auth => 'krb4',
1118: @_,
1119: );
1120: my $result='';
1121: my $check4;
1122: my $check5;
1123: if ($in{'kerb_def_auth'} eq 'krb5') {
1124: $check5 = " checked=\"on\"";
1125: } else {
1126: $check4 = " checked=\"on\"";
1127: }
1128: $result.=<<"END";
1129: <input type="radio" name="login" value="krb"
1130: onclick="javascript:changed_radio('krb',$in{'formname'});"
1131: onchange="javascript:changed_radio('krb',$in{'formname'});" />
1132: Kerberos authenticated with domain
1133: <input type="text" size="10" name="krbarg" value="$in{'kerb_def_dom'}"
1134: onchange="javascript:changed_text('krb',$in{'formname'});" />
1135: <input type="radio" name="krbver" value="4" $check4 />Version 4
1136: <input type="radio" name="krbver" value="5" $check5 />Version 5
1137: END
1138: return $result;
1139: }
1140:
1141: sub authform_internal{
1142: my %args = (
1143: formname => 'document.cu',
1144: kerb_def_dom => 'MSU.EDU',
1145: @_,
1146: );
1147: my $result='';
1148: $result.=<<"END";
1149: <input type="radio" name="login" value="int"
1150: onchange="javascript:changed_radio('int',$args{'formname'});"
1151: onclick="javascript:changed_radio('int',$args{'formname'});" />
1152: Internally authenticated (with initial password
1153: <input type="text" size="10" name="intarg" value=""
1154: onchange="javascript:changed_text('int',$args{'formname'});" />)
1155: END
1156: return $result;
1157: }
1158:
1159: sub authform_local{
1160: my %in = (
1161: formname => 'document.cu',
1162: kerb_def_dom => 'MSU.EDU',
1163: @_,
1164: );
1165: my $result='';
1166: $result.=<<"END";
1167: <input type="radio" name="login" value="loc"
1168: onchange="javascript:changed_radio('loc',$in{'formname'});"
1169: onclick="javascript:changed_radio('loc',$in{'formname'});" />
1170: Local Authentication with argument
1171: <input type="text" size="10" name="locarg" value=""
1172: onchange="javascript:changed_text('loc',$in{'formname'});" />
1173: END
1174: return $result;
1175: }
1176:
1177: sub authform_filesystem{
1178: my %in = (
1179: formname => 'document.cu',
1180: kerb_def_dom => 'MSU.EDU',
1181: @_,
1182: );
1183: my $result='';
1184: $result.=<<"END";
1185: <input type="radio" name="login" value="fsys"
1186: onchange="javascript:changed_radio('fsys',$in{'formname'});"
1187: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
1188: Filesystem authenticated (with initial password
1189: <input type="text" size="10" name="fsysarg" value=""
1190: onchange="javascript:changed_text('fsys',$in{'formname'});">)
1191: END
1192: return $result;
1193: }
1194:
1195: =pod
1196:
1197: =back
1198:
1199: =cut
1200:
1201: ###############################################################
1202: ## Get Authentication Defaults for Domain ##
1203: ###############################################################
1204:
1205: =pod
1206:
1207: =head1 Domains and Authentication
1208:
1209: Returns default authentication type and an associated argument as
1210: listed in file 'domain.tab'.
1211:
1212: =over 4
1213:
1214: =item * get_auth_defaults
1215:
1216: get_auth_defaults($target_domain) returns the default authentication
1217: type and an associated argument (initial password or a kerberos domain).
1218: These values are stored in lonTabs/domain.tab
1219:
1220: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1221:
1222: If target_domain is not found in domain.tab, returns nothing ('').
1223:
1224: =cut
1225:
1226: #-------------------------------------------
1227: sub get_auth_defaults {
1228: my $domain=shift;
1229: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1230: }
1231: ###############################################################
1232: ## End Get Authentication Defaults for Domain ##
1233: ###############################################################
1234:
1235: ###############################################################
1236: ## Get Kerberos Defaults for Domain ##
1237: ###############################################################
1238: ##
1239: ## Returns default kerberos version and an associated argument
1240: ## as listed in file domain.tab. If not listed, provides
1241: ## appropriate default domain and kerberos version.
1242: ##
1243: #-------------------------------------------
1244:
1245: =pod
1246:
1247: =item * get_kerberos_defaults
1248:
1249: get_kerberos_defaults($target_domain) returns the default kerberos
1250: version and domain. If not found in domain.tabs, it defaults to
1251: version 4 and the domain of the server.
1252:
1253: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1254:
1255: =cut
1256:
1257: #-------------------------------------------
1258: sub get_kerberos_defaults {
1259: my $domain=shift;
1260: my ($krbdef,$krbdefdom) =
1261: &Apache::loncommon::get_auth_defaults($domain);
1262: unless ($krbdef =~/^krb/ && $krbdefdom) {
1263: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1264: my $krbdefdom=$1;
1265: $krbdefdom=~tr/a-z/A-Z/;
1266: $krbdef = "krb4";
1267: }
1268: return ($krbdef,$krbdefdom);
1269: }
1270:
1271: =pod
1272:
1273: =back
1274:
1275: =cut
1276:
1277: ###############################################################
1278: ## Thesaurus Functions ##
1279: ###############################################################
1280:
1281: =pod
1282:
1283: =head1 Thesaurus Functions
1284:
1285: =over 4
1286:
1287: =item * initialize_keywords
1288:
1289: Initializes the package variable %Keywords if it is empty. Uses the
1290: package variable $thesaurus_db_file.
1291:
1292: =cut
1293:
1294: ###################################################
1295:
1296: sub initialize_keywords {
1297: return 1 if (scalar keys(%Keywords));
1298: # If we are here, %Keywords is empty, so fill it up
1299: # Make sure the file we need exists...
1300: if (! -e $thesaurus_db_file) {
1301: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1302: " failed because it does not exist");
1303: return 0;
1304: }
1305: # Set up the hash as a database
1306: my %thesaurus_db;
1307: if (! tie(%thesaurus_db,'GDBM_File',
1308: $thesaurus_db_file,&GDBM_READER(),0640)){
1309: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1310: $thesaurus_db_file);
1311: return 0;
1312: }
1313: # Get the average number of appearances of a word.
1314: my $avecount = $thesaurus_db{'average.count'};
1315: # Put keywords (those that appear > average) into %Keywords
1316: while (my ($word,$data)=each (%thesaurus_db)) {
1317: my ($count,undef) = split /:/,$data;
1318: $Keywords{$word}++ if ($count > $avecount);
1319: }
1320: untie %thesaurus_db;
1321: # Remove special values from %Keywords.
1322: foreach ('total.count','average.count') {
1323: delete($Keywords{$_}) if (exists($Keywords{$_}));
1324: }
1325: return 1;
1326: }
1327:
1328: ###################################################
1329:
1330: =pod
1331:
1332: =item * keyword($word)
1333:
1334: Returns true if $word is a keyword. A keyword is a word that appears more
1335: than the average number of times in the thesaurus database. Calls
1336: &initialize_keywords
1337:
1338: =cut
1339:
1340: ###################################################
1341:
1342: sub keyword {
1343: return if (!&initialize_keywords());
1344: my $word=lc(shift());
1345: $word=~s/\W//g;
1346: return exists($Keywords{$word});
1347: }
1348:
1349: ###############################################################
1350:
1351: =pod
1352:
1353: =item * get_related_words
1354:
1355: Look up a word in the thesaurus. Takes a scalar arguement and returns
1356: an array of words. If the keyword is not in the thesaurus, an empty array
1357: will be returned. The order of the words returned is determined by the
1358: database which holds them.
1359:
1360: Uses global $thesaurus_db_file.
1361:
1362: =cut
1363:
1364: ###############################################################
1365: sub get_related_words {
1366: my $keyword = shift;
1367: my %thesaurus_db;
1368: if (! -e $thesaurus_db_file) {
1369: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1370: "failed because the file does not exist");
1371: return ();
1372: }
1373: if (! tie(%thesaurus_db,'GDBM_File',
1374: $thesaurus_db_file,&GDBM_READER(),0640)){
1375: return ();
1376: }
1377: my @Words=();
1378: if (exists($thesaurus_db{$keyword})) {
1379: $_ = $thesaurus_db{$keyword};
1380: (undef,@Words) = split/:/; # The first element is the number of times
1381: # the word appears. We do not need it now.
1382: for (my $i=0;$i<=$#Words;$i++) {
1383: ($Words[$i],undef)= split/\,/,$Words[$i];
1384: }
1385: }
1386: untie %thesaurus_db;
1387: return @Words;
1388: }
1389:
1390: =pod
1391:
1392: =back
1393:
1394: =cut
1395:
1396: # -------------------------------------------------------------- Plaintext name
1397: =pod
1398:
1399: =head1 User Name Functions
1400:
1401: =over 4
1402:
1403: =item * plainname($uname,$udom)
1404:
1405: Takes a users logon name and returns it as a string in
1406: "first middle last generation" form
1407:
1408: =cut
1409:
1410: ###############################################################
1411: sub plainname {
1412: my ($uname,$udom)=@_;
1413: my %names=&Apache::lonnet::get('environment',
1414: ['firstname','middlename','lastname','generation'],
1415: $udom,$uname);
1416: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1417: $names{'lastname'}.' '.$names{'generation'};
1418: $name=~s/\s+$//;
1419: $name=~s/\s+/ /g;
1420: return $name;
1421: }
1422:
1423: # -------------------------------------------------------------------- Nickname
1424: =pod
1425:
1426: =item * nickname($uname,$udom)
1427:
1428: Gets a users name and returns it as a string as
1429:
1430: ""nickname""
1431:
1432: if the user has a nickname or
1433:
1434: "first middle last generation"
1435:
1436: if the user does not
1437:
1438: =cut
1439:
1440: sub nickname {
1441: my ($uname,$udom)=@_;
1442: my %names=&Apache::lonnet::get('environment',
1443: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1444: my $name=$names{'nickname'};
1445: if ($name) {
1446: $name='"'.$name.'"';
1447: } else {
1448: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1449: $names{'lastname'}.' '.$names{'generation'};
1450: $name=~s/\s+$//;
1451: $name=~s/\s+/ /g;
1452: }
1453: return $name;
1454: }
1455:
1456:
1457: # ------------------------------------------------------------------ Screenname
1458:
1459: =pod
1460:
1461: =item * screenname($uname,$udom)
1462:
1463: Gets a users screenname and returns it as a string
1464:
1465: =cut
1466:
1467: sub screenname {
1468: my ($uname,$udom)=@_;
1469: my %names=
1470: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1471: return $names{'screenname'};
1472: }
1473:
1474: # ------------------------------------------------------------- Message Wrapper
1475:
1476: sub messagewrapper {
1477: my ($link,$un,$do)=@_;
1478: return
1479: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1480: }
1481: # --------------------------------------------------------------- Notes Wrapper
1482:
1483: sub noteswrapper {
1484: my ($link,$un,$do)=@_;
1485: return
1486: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1487: }
1488: # ------------------------------------------------------------- Aboutme Wrapper
1489:
1490: sub aboutmewrapper {
1491: my ($link,$username,$domain)=@_;
1492: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1493: }
1494:
1495: # ------------------------------------------------------------ Syllabus Wrapper
1496:
1497:
1498: sub syllabuswrapper {
1499: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1500: if ($fontcolor) {
1501: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1502: }
1503: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1504: }
1505:
1506: =pod
1507:
1508: =back
1509:
1510: =head1 Access .tab File Data
1511:
1512: =over 4
1513:
1514: =item * languageids()
1515:
1516: returns list of all language ids
1517:
1518: =cut
1519:
1520: sub languageids {
1521: return sort(keys(%language));
1522: }
1523:
1524: =pod
1525:
1526: =item * languagedescription()
1527:
1528: returns description of a specified language id
1529:
1530: =cut
1531:
1532: sub languagedescription {
1533: my $code=shift;
1534: return ($supported_language{$code}?'* ':'').
1535: $language{$code}.
1536: ($supported_language{$code}?' ('.&mt('interface available').')':'');
1537: }
1538:
1539: =pod
1540:
1541: =item * copyrightids()
1542:
1543: returns list of all copyrights
1544:
1545: =cut
1546:
1547: sub copyrightids {
1548: return sort(keys(%cprtag));
1549: }
1550:
1551: =pod
1552:
1553: =item * copyrightdescription()
1554:
1555: returns description of a specified copyright id
1556:
1557: =cut
1558:
1559: sub copyrightdescription {
1560: return $cprtag{shift(@_)};
1561: }
1562:
1563: =pod
1564:
1565: =item * filecategories()
1566:
1567: returns list of all file categories
1568:
1569: =cut
1570:
1571: sub filecategories {
1572: return sort(keys(%category_extensions));
1573: }
1574:
1575: =pod
1576:
1577: =item * filecategorytypes()
1578:
1579: returns list of file types belonging to a given file
1580: category
1581:
1582: =cut
1583:
1584: sub filecategorytypes {
1585: return @{$category_extensions{lc($_[0])}};
1586: }
1587:
1588: =pod
1589:
1590: =item * fileembstyle()
1591:
1592: returns embedding style for a specified file type
1593:
1594: =cut
1595:
1596: sub fileembstyle {
1597: return $fe{lc(shift(@_))};
1598: }
1599:
1600: =pod
1601:
1602: =item * filedescription()
1603:
1604: returns description for a specified file type
1605:
1606: =cut
1607:
1608: sub filedescription {
1609: return $fd{lc(shift(@_))};
1610: }
1611:
1612: =pod
1613:
1614: =item * filedescriptionex()
1615:
1616: returns description for a specified file type with
1617: extra formatting
1618:
1619: =cut
1620:
1621: sub filedescriptionex {
1622: my $ex=shift;
1623: return '.'.$ex.' '.$fd{lc($ex)};
1624: }
1625:
1626: # End of .tab access
1627: =pod
1628:
1629: =back
1630:
1631: =cut
1632:
1633: # ------------------------------------------------------------------ File Types
1634: sub fileextensions {
1635: return sort(keys(%fe));
1636: }
1637:
1638: # ----------------------------------------------------------- Display Languages
1639: # returns a hash with all desired display languages
1640: #
1641:
1642: sub display_languages {
1643: my %languages=();
1644: foreach (&preferred_languages()) {
1645: $languages{$_}=1;
1646: }
1647: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1648: if ($ENV{'form.displaylanguage'}) {
1649: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1650: $languages{$_}=1;
1651: }
1652: }
1653: return %languages;
1654: }
1655:
1656: sub preferred_languages {
1657: my @languages=();
1658: if ($ENV{'environment.languages'}) {
1659: @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
1660: }
1661: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1662: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
1663: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
1664: }
1665: my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
1666: if ($browser) {
1667: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
1668: }
1669: if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
1670: @languages=(@languages,
1671: $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
1672: }
1673: if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
1674: @languages=(@languages,
1675: $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
1676: }
1677: if ($Apache::lonnet::domain_lang_def{
1678: $Apache::lonnet::perlvar{'lonDefDomain'}}) {
1679: @languages=(@languages,
1680: $Apache::lonnet::domain_lang_def{
1681: $Apache::lonnet::perlvar{'lonDefDomain'}});
1682: }
1683: # turn "en-ca" into "en-ca,en"
1684: my @genlanguages;
1685: foreach (@languages) {
1686: unless ($_=~/\w/) { next; }
1687: push (@genlanguages,$_);
1688: if ($_=~/(\-|\_)/) {
1689: push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
1690: }
1691: }
1692: return @genlanguages;
1693: }
1694:
1695: ###############################################################
1696: ## Student Answer Attempts ##
1697: ###############################################################
1698:
1699: =pod
1700:
1701: =head1 Alternate Problem Views
1702:
1703: =over 4
1704:
1705: =item * get_previous_attempt($symb, $username, $domain, $course,
1706: $getattempt, $regexp, $gradesub)
1707:
1708: Return string with previous attempt on problem. Arguments:
1709:
1710: =over 4
1711:
1712: =item * $symb: Problem, including path
1713:
1714: =item * $username: username of the desired student
1715:
1716: =item * $domain: domain of the desired student
1717:
1718: =item * $course: Course ID
1719:
1720: =item * $getattempt: Leave blank for all attempts, otherwise put
1721: something
1722:
1723: =item * $regexp: if string matches this regexp, the string will be
1724: sent to $gradesub
1725:
1726: =item * $gradesub: routine that processes the string if it matches $regexp
1727:
1728: =back
1729:
1730: The output string is a table containing all desired attempts, if any.
1731:
1732: =cut
1733:
1734: sub get_previous_attempt {
1735: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1736: my $prevattempts='';
1737: no strict 'refs';
1738: if ($symb) {
1739: my (%returnhash)=
1740: &Apache::lonnet::restore($symb,$course,$domain,$username);
1741: if ($returnhash{'version'}) {
1742: my %lasthash=();
1743: my $version;
1744: for ($version=1;$version<=$returnhash{'version'};$version++) {
1745: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1746: $lasthash{$_}=$returnhash{$version.':'.$_};
1747: }
1748: }
1749: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1750: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1751: foreach (sort(keys %lasthash)) {
1752: my ($ign,@parts) = split(/\./,$_);
1753: if ($#parts > 0) {
1754: my $data=$parts[-1];
1755: pop(@parts);
1756: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1757: } else {
1758: if ($#parts == 0) {
1759: $prevattempts.='<th>'.$parts[0].'</th>';
1760: } else {
1761: $prevattempts.='<th>'.$ign.'</th>';
1762: }
1763: }
1764: }
1765: if ($getattempt eq '') {
1766: for ($version=1;$version<=$returnhash{'version'};$version++) {
1767: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1768: foreach (sort(keys %lasthash)) {
1769: my $value;
1770: if ($_ =~ /timestamp/) {
1771: $value=scalar(localtime($returnhash{$version.':'.$_}));
1772: } else {
1773: $value=$returnhash{$version.':'.$_};
1774: }
1775: $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
1776: }
1777: }
1778: }
1779: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1780: foreach (sort(keys %lasthash)) {
1781: my $value;
1782: if ($_ =~ /timestamp/) {
1783: $value=scalar(localtime($lasthash{$_}));
1784: } else {
1785: $value=$lasthash{$_};
1786: }
1787: $value=&Apache::lonnet::unescape($value);
1788: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1789: $prevattempts.='<td>'.$value.' </td>';
1790: }
1791: $prevattempts.='</tr></table></td></tr></table>';
1792: } else {
1793: $prevattempts='Nothing submitted - no attempts.';
1794: }
1795: } else {
1796: $prevattempts='No data.';
1797: }
1798: }
1799:
1800: sub relative_to_absolute {
1801: my ($url,$output)=@_;
1802: my $parser=HTML::TokeParser->new(\$output);
1803: my $token;
1804: my $thisdir=$url;
1805: my @rlinks=();
1806: while ($token=$parser->get_token) {
1807: if ($token->[0] eq 'S') {
1808: if ($token->[1] eq 'a') {
1809: if ($token->[2]->{'href'}) {
1810: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1811: }
1812: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1813: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1814: } elsif ($token->[1] eq 'base') {
1815: $thisdir=$token->[2]->{'href'};
1816: }
1817: }
1818: }
1819: $thisdir=~s-/[^/]*$--;
1820: foreach (@rlinks) {
1821: unless (($_=~/^http:\/\//i) ||
1822: ($_=~/^\//) ||
1823: ($_=~/^javascript:/i) ||
1824: ($_=~/^mailto:/i) ||
1825: ($_=~/^\#/)) {
1826: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1827: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1828: }
1829: }
1830: # -------------------------------------------------- Deal with Applet codebases
1831: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1832: return $output;
1833: }
1834:
1835: =pod
1836:
1837: =item * get_student_view
1838:
1839: show a snapshot of what student was looking at
1840:
1841: =cut
1842:
1843: sub get_student_view {
1844: my ($symb,$username,$domain,$courseid,$target) = @_;
1845: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1846: my (%old,%moreenv);
1847: my @elements=('symb','courseid','domain','username');
1848: foreach my $element (@elements) {
1849: $old{$element}=$ENV{'form.grade_'.$element};
1850: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1851: }
1852: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1853: &Apache::lonnet::appenv(%moreenv);
1854: $feedurl=&Apache::lonnet::clutter($feedurl);
1855: my $userview=&Apache::lonnet::ssi_body($feedurl);
1856: &Apache::lonnet::delenv('form.grade_');
1857: foreach my $element (@elements) {
1858: $ENV{'form.grade_'.$element}=$old{$element};
1859: }
1860: $userview=~s/\<body[^\>]*\>//gi;
1861: $userview=~s/\<\/body\>//gi;
1862: $userview=~s/\<html\>//gi;
1863: $userview=~s/\<\/html\>//gi;
1864: $userview=~s/\<head\>//gi;
1865: $userview=~s/\<\/head\>//gi;
1866: $userview=~s/action\s*\=/would_be_action\=/gi;
1867: $userview=&relative_to_absolute($feedurl,$userview);
1868: return $userview;
1869: }
1870:
1871: =pod
1872:
1873: =item * get_student_answers()
1874:
1875: show a snapshot of how student was answering problem
1876:
1877: =cut
1878:
1879: sub get_student_answers {
1880: my ($symb,$username,$domain,$courseid,%form) = @_;
1881: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1882: my (%old,%moreenv);
1883: my @elements=('symb','courseid','domain','username');
1884: foreach my $element (@elements) {
1885: $old{$element}=$ENV{'form.grade_'.$element};
1886: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1887: }
1888: $moreenv{'form.grade_target'}='answer';
1889: &Apache::lonnet::appenv(%moreenv);
1890: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1891: &Apache::lonnet::delenv('form.grade_');
1892: foreach my $element (@elements) {
1893: $ENV{'form.grade_'.$element}=$old{$element};
1894: }
1895: return $userview;
1896: }
1897:
1898: =pod
1899:
1900: =item * &submlink()
1901:
1902: Inputs: $text $uname $udom $symb
1903:
1904: Returns: A link to grades.pm such as to see the SUBM view of a student
1905:
1906: =cut
1907:
1908: ###############################################
1909: sub submlink {
1910: my ($text,$uname,$udom,$symb)=@_;
1911: if (!($uname && $udom)) {
1912: (my $cursymb, my $courseid,$udom,$uname)=
1913: &Apache::lonxml::whichuser($symb);
1914: if (!$symb) { $symb=$cursymb; }
1915: }
1916: if (!$symb) { $symb=&symbread(); }
1917: return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
1918: '&userdom='.$udom.'&command=submission">'.$text.'</a>';
1919: }
1920: ##############################################
1921:
1922: =pod
1923:
1924: =back
1925:
1926: =cut
1927:
1928: ###############################################
1929:
1930:
1931: sub timehash {
1932: my @ltime=localtime(shift);
1933: return ( 'seconds' => $ltime[0],
1934: 'minutes' => $ltime[1],
1935: 'hours' => $ltime[2],
1936: 'day' => $ltime[3],
1937: 'month' => $ltime[4]+1,
1938: 'year' => $ltime[5]+1900,
1939: 'weekday' => $ltime[6],
1940: 'dayyear' => $ltime[7]+1,
1941: 'dlsav' => $ltime[8] );
1942: }
1943:
1944: sub maketime {
1945: my %th=@_;
1946: return POSIX::mktime(
1947: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1948: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1949: }
1950:
1951:
1952: #########################################
1953: #
1954: # Retro-fixing of un-backward-compatible time format
1955:
1956: sub unsqltime {
1957: my $timestamp=shift;
1958: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1959: $timestamp=&maketime(
1960: 'year'=>$1,'month'=>$2,'day'=>$3,
1961: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1962: }
1963: return $timestamp;
1964: }
1965:
1966: #########################################
1967:
1968: sub findallcourses {
1969: my %courses=();
1970: my $now=time;
1971: foreach (keys %ENV) {
1972: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1973: my ($starttime,$endtime)=$ENV{$_};
1974: my $active=1;
1975: if ($starttime) {
1976: if ($now<$starttime) { $active=0; }
1977: }
1978: if ($endtime) {
1979: if ($now>$endtime) { $active=0; }
1980: }
1981: if ($active) { $courses{$1.'_'.$2}=1; }
1982: }
1983: }
1984: return keys %courses;
1985: }
1986:
1987: ###############################################
1988: ###############################################
1989:
1990: =pod
1991:
1992: =head1 Domain Template Functions
1993:
1994: =over 4
1995:
1996: =item * &determinedomain()
1997:
1998: Inputs: $domain (usually will be undef)
1999:
2000: Returns: Determines which domain should be used for designs
2001:
2002: =cut
2003:
2004: ###############################################
2005: sub determinedomain {
2006: my $domain=shift;
2007: if (! $domain) {
2008: # Determine domain if we have not been given one
2009: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
2010: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
2011: if ($ENV{'request.role.domain'}) {
2012: $domain=$ENV{'request.role.domain'};
2013: }
2014: }
2015: return $domain;
2016: }
2017: ###############################################
2018: =pod
2019:
2020: =item * &domainlogo()
2021:
2022: Inputs: $domain (usually will be undef)
2023:
2024: Returns: A link to a domain logo, if the domain logo exists.
2025: If the domain logo does not exist, a description of the domain.
2026:
2027: =cut
2028:
2029: ###############################################
2030: sub domainlogo {
2031: my $domain = &determinedomain(shift);
2032: # See if there is a logo
2033: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
2034: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2035: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2036: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
2037: '/adm/lonDomLogos/'.$domain.'.gif" />';
2038: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
2039: return $Apache::lonnet::domaindescription{$domain};
2040: } else {
2041: return '';
2042: }
2043: }
2044: ##############################################
2045:
2046: =pod
2047:
2048: =item * &designparm()
2049:
2050: Inputs: $which parameter; $domain (usually will be undef)
2051:
2052: Returns: value of designparamter $which
2053:
2054: =cut
2055:
2056: ##############################################
2057: sub designparm {
2058: my ($which,$domain)=@_;
2059: if ($ENV{'browser.blackwhite'} eq 'on') {
2060: if ($which=~/\.(font|alink|vlink|link)$/) {
2061: return '#000000';
2062: }
2063: if ($which=~/\.(pgbg|sidebg)$/) {
2064: return '#FFFFFF';
2065: }
2066: if ($which=~/\.tabbg$/) {
2067: return '#CCCCCC';
2068: }
2069: }
2070: if ($ENV{'environment.color.'.$which}) {
2071: return $ENV{'environment.color.'.$which};
2072: }
2073: $domain=&determinedomain($domain);
2074: if ($designhash{$domain.'.'.$which}) {
2075: return $designhash{$domain.'.'.$which};
2076: } else {
2077: return $designhash{'default.'.$which};
2078: }
2079: }
2080:
2081: ###############################################
2082: ###############################################
2083:
2084: =pod
2085:
2086: =back
2087:
2088: =head1 HTTP Helpers
2089:
2090: =over 4
2091:
2092: =item * &bodytag()
2093:
2094: Returns a uniform header for LON-CAPA web pages.
2095:
2096: Inputs:
2097:
2098: =over 4
2099:
2100: =item * $title, A title to be displayed on the page.
2101:
2102: =item * $function, the current role (can be undef).
2103:
2104: =item * $addentries, extra parameters for the <body> tag.
2105:
2106: =item * $bodyonly, if defined, only return the <body> tag.
2107:
2108: =item * $domain, if defined, force a given domain.
2109:
2110: =item * $forcereg, if page should register as content page (relevant for
2111: text interface only)
2112:
2113: =back
2114:
2115: Returns: A uniform header for LON-CAPA web pages.
2116: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2117: If $bodyonly is undef or zero, an html string containing a <body> tag and
2118: other decorations will be returned.
2119:
2120: =cut
2121:
2122: sub bodytag {
2123: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2124: $title=&mt($title);
2125: unless ($function) {
2126: $function='student';
2127: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2128: $function='coordinator';
2129: }
2130: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2131: $function='admin';
2132: }
2133: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2134: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2135: $function='author';
2136: }
2137: }
2138: my $img=&designparm($function.'.img',$domain);
2139: my $pgbg=&designparm($function.'.pgbg',$domain);
2140: my $tabbg=&designparm($function.'.tabbg',$domain);
2141: my $font=&designparm($function.'.font',$domain);
2142: my $link=&designparm($function.'.link',$domain);
2143: my $alink=&designparm($function.'.alink',$domain);
2144: my $vlink=&designparm($function.'.vlink',$domain);
2145: my $sidebg=&designparm($function.'.sidebg',$domain);
2146: # Accessibility font enhance
2147: unless ($addentries) { $addentries=''; }
2148: if ($ENV{'browser.fontenhance'} eq 'on') {
2149: $addentries.=' style="font-size: x-large"';
2150: }
2151: # role and realm
2152: my ($role,$realm)
2153: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2154: # realm
2155: if ($ENV{'request.course.id'}) {
2156: $realm=
2157: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2158: }
2159: unless ($realm) { $realm=' '; }
2160: # Set messages
2161: my $messages=&domainlogo($domain);
2162: # Port for miniserver
2163: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2164: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2165: # construct main body tag
2166: my $bodytag = <<END;
2167: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2168: $addentries>
2169: END
2170: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2171: $lonhttpdPort.$img.'" />';
2172: if ($bodyonly) {
2173: return $bodytag;
2174: } elsif ($ENV{'browser.interface'} eq 'textual') {
2175: # Accessibility
2176: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2177: $forcereg).
2178: '<h1>LON-CAPA: '.$title.'</h1>';
2179: } elsif ($ENV{'environment.remote'} eq 'off') {
2180: # No Remote
2181: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2182: $forcereg).
2183: '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font size="+3" color="'.$font.'"><b>'.$title.
2184: '</b></font></td></tr></table>';
2185: }
2186:
2187: #
2188: # Top frame rendering, Remote is up
2189: #
2190: return(<<ENDBODY);
2191: $bodytag
2192: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2193: <tr><td bgcolor="$sidebg">
2194: $upperleft</td>
2195: <td bgcolor="$sidebg" align="right">$messages </td>
2196: </tr>
2197: <tr>
2198: <td rowspan="3" bgcolor="$tabbg">
2199: <font size="5"><b>$title</b></font>
2200: <td bgcolor="$tabbg" align="right">
2201: <font size="2">
2202: $ENV{'environment.firstname'}
2203: $ENV{'environment.middlename'}
2204: $ENV{'environment.lastname'}
2205: $ENV{'environment.generation'}
2206: </font>
2207: </td>
2208: </tr>
2209: <tr><td bgcolor="$tabbg" align="right">
2210: <font size="2">$role</font>
2211: </td></tr>
2212: <tr>
2213: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
2214: </table><br>
2215: ENDBODY
2216: }
2217:
2218: ###############################################
2219:
2220: sub get_posted_cgi {
2221: my $r=shift;
2222:
2223: my $buffer;
2224:
2225: $r->read($buffer,$r->header_in('Content-length'),0);
2226: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2227: my @pairs=split(/&/,$buffer);
2228: my $pair;
2229: foreach $pair (@pairs) {
2230: my ($name,$value) = split(/=/,$pair);
2231: $value =~ tr/+/ /;
2232: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2233: $name =~ tr/+/ /;
2234: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2235: &add_to_env("form.$name",$value);
2236: }
2237: } else {
2238: my $contentsep=$1;
2239: my @lines = split (/\n/,$buffer);
2240: my $name='';
2241: my $value='';
2242: my $fname='';
2243: my $fmime='';
2244: my $i;
2245: for ($i=0;$i<=$#lines;$i++) {
2246: if ($lines[$i]=~/^$contentsep/) {
2247: if ($name) {
2248: chomp($value);
2249: if ($fname) {
2250: $ENV{"form.$name.filename"}=$fname;
2251: $ENV{"form.$name.mimetype"}=$fmime;
2252: } else {
2253: $value=~s/\s+$//s;
2254: }
2255: &add_to_env("form.$name",$value);
2256: }
2257: if ($i<$#lines) {
2258: $i++;
2259: $lines[$i]=~
2260: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2261: $name=$1;
2262: $value='';
2263: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2264: $fname=$1;
2265: if
2266: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2267: $fmime=$1;
2268: $i++;
2269: } else {
2270: $fmime='';
2271: }
2272: } else {
2273: $fname='';
2274: $fmime='';
2275: }
2276: $i++;
2277: }
2278: } else {
2279: $value.=$lines[$i]."\n";
2280: }
2281: }
2282: }
2283: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2284: $r->method_number(M_GET);
2285: $r->method('GET');
2286: $r->headers_in->unset('Content-length');
2287: }
2288:
2289: =pod
2290:
2291: =item * get_unprocessed_cgi($query,$possible_names)
2292:
2293: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2294: $query. The parameters listed in $possible_names (an array reference),
2295: will be set in $ENV{'form.name'} if they do not already exist.
2296:
2297: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2298: $possible_names is an ref to an array of form element names. As an example:
2299: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2300: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2301:
2302: =cut
2303:
2304: sub get_unprocessed_cgi {
2305: my ($query,$possible_names)= @_;
2306: # $Apache::lonxml::debug=1;
2307: foreach (split(/&/,$query)) {
2308: my ($name, $value) = split(/=/,$_);
2309: $name = &Apache::lonnet::unescape($name);
2310: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2311: $value =~ tr/+/ /;
2312: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2313: &Apache::lonxml::debug("Seting :$name: to :$value:");
2314: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2315: }
2316: }
2317: }
2318:
2319: =pod
2320:
2321: =item * cacheheader()
2322:
2323: returns cache-controlling header code
2324:
2325: =cut
2326:
2327: sub cacheheader {
2328: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2329: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2330: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2331: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2332: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2333: return $output;
2334: }
2335:
2336: =pod
2337:
2338: =item * no_cache($r)
2339:
2340: specifies header code to not have cache
2341:
2342: =cut
2343:
2344: sub no_cache {
2345: my ($r) = @_;
2346: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2347: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2348: $r->no_cache(1);
2349: $r->header_out("Pragma" => "no-cache");
2350: #$r->header_out("Expires" => $date);
2351: }
2352:
2353: sub content_type {
2354: my ($r,$type,$charset) = @_;
2355: unless ($charset) {
2356: $charset=&Apache::lonlocal::current_encoding;
2357: }
2358: $r->content_type($type.($charset?'; charset='.$charset:''));
2359: }
2360:
2361: =pod
2362:
2363: =item * add_to_env($name,$value)
2364:
2365: adds $name to the %ENV hash with value
2366: $value, if $name already exists, the entry is converted to an array
2367: reference and $value is added to the array.
2368:
2369: =cut
2370:
2371: sub add_to_env {
2372: my ($name,$value)=@_;
2373: if (defined($ENV{$name})) {
2374: if (ref($ENV{$name})) {
2375: #already have multiple values
2376: push(@{ $ENV{$name} },$value);
2377: } else {
2378: #first time seeing multiple values, convert hash entry to an arrayref
2379: my $first=$ENV{$name};
2380: undef($ENV{$name});
2381: push(@{ $ENV{$name} },$first,$value);
2382: }
2383: } else {
2384: $ENV{$name}=$value;
2385: }
2386: }
2387:
2388: =pod
2389:
2390: =back
2391:
2392: =head1 CSV Upload/Handling functions
2393:
2394: =over 4
2395:
2396: =item * upfile_store($r)
2397:
2398: Store uploaded file, $r should be the HTTP Request object,
2399: needs $ENV{'form.upfile'}
2400: returns $datatoken to be put into hidden field
2401:
2402: =cut
2403:
2404: sub upfile_store {
2405: my $r=shift;
2406: $ENV{'form.upfile'}=~s/\r/\n/gs;
2407: $ENV{'form.upfile'}=~s/\f/\n/gs;
2408: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2409: $ENV{'form.upfile'}=~s/\n+$//gs;
2410:
2411: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2412: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2413: {
2414: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
2415: '/tmp/'.$datatoken.'.tmp');
2416: print $fh $ENV{'form.upfile'};
2417: }
2418: return $datatoken;
2419: }
2420:
2421: =pod
2422:
2423: =item * load_tmp_file($r)
2424:
2425: Load uploaded file from tmp, $r should be the HTTP Request object,
2426: needs $ENV{'form.datatoken'},
2427: sets $ENV{'form.upfile'} to the contents of the file
2428:
2429: =cut
2430:
2431: sub load_tmp_file {
2432: my $r=shift;
2433: my @studentdata=();
2434: {
2435: my $fh;
2436: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
2437: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
2438: @studentdata=<$fh>;
2439: }
2440: }
2441: $ENV{'form.upfile'}=join('',@studentdata);
2442: }
2443:
2444: =pod
2445:
2446: =item * upfile_record_sep()
2447:
2448: Separate uploaded file into records
2449: returns array of records,
2450: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2451:
2452: =cut
2453:
2454: sub upfile_record_sep {
2455: if ($ENV{'form.upfiletype'} eq 'xml') {
2456: } else {
2457: return split(/\n/,$ENV{'form.upfile'});
2458: }
2459: }
2460:
2461: =pod
2462:
2463: =item * record_sep($record)
2464:
2465: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2466:
2467: =cut
2468:
2469: sub record_sep {
2470: my $record=shift;
2471: my %components=();
2472: if ($ENV{'form.upfiletype'} eq 'xml') {
2473: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2474: my $i=0;
2475: foreach (split(/\s+/,$record)) {
2476: my $field=$_;
2477: $field=~s/^(\"|\')//;
2478: $field=~s/(\"|\')$//;
2479: $components{$i}=$field;
2480: $i++;
2481: }
2482: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2483: my $i=0;
2484: foreach (split(/\t+/,$record)) {
2485: my $field=$_;
2486: $field=~s/^(\"|\')//;
2487: $field=~s/(\"|\')$//;
2488: $components{$i}=$field;
2489: $i++;
2490: }
2491: } else {
2492: my @allfields=split(/\,/,$record);
2493: my $i=0;
2494: my $j;
2495: for ($j=0;$j<=$#allfields;$j++) {
2496: my $field=$allfields[$j];
2497: if ($field=~/^\s*(\"|\')/) {
2498: my $delimiter=$1;
2499: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2500: $j++;
2501: $field.=','.$allfields[$j];
2502: }
2503: $field=~s/^\s*$delimiter//;
2504: $field=~s/$delimiter\s*$//;
2505: }
2506: $components{$i}=$field;
2507: $i++;
2508: }
2509: }
2510: return %components;
2511: }
2512:
2513: =pod
2514:
2515: =item * upfile_select_html()
2516:
2517: return HTML code to select file and specify its type
2518:
2519: =cut
2520:
2521: sub upfile_select_html {
2522: return (<<'ENDUPFORM');
2523: <input type="file" name="upfile" size="50" />
2524: <br />Type: <select name="upfiletype">
2525: <option value="csv">CSV (comma separated values, spreadsheet)</option>
2526: <option value="space">Space separated</option>
2527: <option value="tab">Tabulator separated</option>
2528: <option value="xml">HTML/XML</option>
2529: </select>
2530: ENDUPFORM
2531: }
2532:
2533: =pod
2534:
2535: =item * csv_print_samples($r,$records)
2536:
2537: Prints a table of sample values from each column uploaded $r is an
2538: Apache Request ref, $records is an arrayref from
2539: &Apache::loncommon::upfile_record_sep
2540:
2541: =cut
2542:
2543: sub csv_print_samples {
2544: my ($r,$records) = @_;
2545: my (%sone,%stwo,%sthree);
2546: %sone=&record_sep($$records[0]);
2547: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2548: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2549:
2550: $r->print('Samples<br /><table border="2"><tr>');
2551: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
2552: $r->print('</tr>');
2553: foreach my $hash (\%sone,\%stwo,\%sthree) {
2554: $r->print('<tr>');
2555: foreach (sort({$a <=> $b} keys(%sone))) {
2556: $r->print('<td>');
2557: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2558: $r->print('</td>');
2559: }
2560: $r->print('</tr>');
2561: }
2562: $r->print('</tr></table><br />'."\n");
2563: }
2564:
2565: =pod
2566:
2567: =item * csv_print_select_table($r,$records,$d)
2568:
2569: Prints a table to create associations between values and table columns.
2570: $r is an Apache Request ref,
2571: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2572: $d is an array of 2 element arrays (internal name, displayed name)
2573:
2574: =cut
2575:
2576: sub csv_print_select_table {
2577: my ($r,$records,$d) = @_;
2578: my $i=0;my %sone;
2579: %sone=&record_sep($$records[0]);
2580: $r->print('Associate columns with student attributes.'."\n".
2581: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
2582: foreach (@$d) {
2583: my ($value,$display)=@{ $_ };
2584: $r->print('<tr><td>'.$display.'</td>');
2585:
2586: $r->print('<td><select name=f'.$i.
2587: ' onchange="javascript:flip(this.form,'.$i.');">');
2588: $r->print('<option value="none"></option>');
2589: foreach (sort({$a <=> $b} keys(%sone))) {
2590: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2591: }
2592: $r->print('</select></td></tr>'."\n");
2593: $i++;
2594: }
2595: $i--;
2596: return $i;
2597: }
2598:
2599: =pod
2600:
2601: =item * csv_samples_select_table($r,$records,$d)
2602:
2603: Prints a table of sample values from the upload and can make associate samples to internal names.
2604:
2605: $r is an Apache Request ref,
2606: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2607: $d is an array of 2 element arrays (internal name, displayed name)
2608:
2609: =cut
2610:
2611: sub csv_samples_select_table {
2612: my ($r,$records,$d) = @_;
2613: my %sone; my %stwo; my %sthree;
2614: my $i=0;
2615:
2616: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
2617: %sone=&record_sep($$records[0]);
2618: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2619: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2620:
2621: foreach (sort keys %sone) {
2622: $r->print('<tr><td><select name=f'.$i.
2623: ' onchange="javascript:flip(this.form,'.$i.');">');
2624: foreach (@$d) {
2625: my ($value,$display)=@{ $_ };
2626: $r->print('<option value='.$value.'>'.$display.'</option>');
2627: }
2628: $r->print('</select></td><td>');
2629: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2630: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2631: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2632: $r->print('</td></tr>');
2633: $i++;
2634: }
2635: $i--;
2636: return($i);
2637: }
2638:
2639: =pod
2640:
2641: =item clean_excel_name($name)
2642:
2643: Returns a replacement for $name which does not contain any illegal characters.
2644:
2645: =cut
2646:
2647: sub clean_excel_name {
2648: my ($name) = @_;
2649: $name =~ s/[:\*\?\/\\]//g;
2650: if (length($name) > 31) {
2651: $name = substr($name,0,31);
2652: }
2653: return $name;
2654: }
2655:
2656: =pod
2657:
2658: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2659:
2660: Returns either 1 or undef
2661:
2662: 1 if the part is to be hidden, undef if it is to be shown
2663:
2664: Arguments are:
2665:
2666: $id the id of the part to be checked
2667: $symb, optional the symb of the resource to check
2668: $udom, optional the domain of the user to check for
2669: $uname, optional the username of the user to check for
2670:
2671: =cut
2672:
2673: sub check_if_partid_hidden {
2674: my ($id,$symb,$udom,$uname) = @_;
2675: my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
2676: $symb,$udom,$uname);
2677: my $truth=1;
2678: #if the string starts with !, then the list is the list to show not hide
2679: if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
2680: my @hiddenlist=split(/,/,$hiddenparts);
2681: foreach my $checkid (@hiddenlist) {
2682: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
2683: }
2684: return !$truth;
2685: }
2686:
2687:
2688: ############################################################
2689: ############################################################
2690:
2691: =pod
2692:
2693: =head1 cgi-bin script and graphing routines
2694:
2695: =item get_cgi_id
2696:
2697: Inputs: none
2698:
2699: Returns an id which can be used to pass environment variables
2700: to various cgi-bin scripts. These environment variables will
2701: be removed from the users environment after a given time by
2702: the routine &Apache::lonnet::transfer_profile_to_env.
2703:
2704: =cut
2705:
2706: ############################################################
2707: ############################################################
2708:
2709: sub get_cgi_id {
2710: return (time.'_'.int(rand(1000)));
2711: }
2712:
2713: ############################################################
2714: ############################################################
2715:
2716: =pod
2717:
2718: =item DrawBarGraph
2719:
2720: Facilitates the plotting of data in a (stacked) bar graph.
2721: Puts plot definition data into the users environment in order for
2722: graph.png to plot it. Returns an <img> tag for the plot.
2723: The bars on the plot are labeled '1','2',...,'n'.
2724:
2725: Inputs:
2726:
2727: =over 4
2728:
2729: =item $Title: string, the title of the plot
2730:
2731: =item $xlabel: string, text describing the X-axis of the plot
2732:
2733: =item $ylabel: string, text describing the Y-axis of the plot
2734:
2735: =item $Max: scalar, the maximum Y value to use in the plot
2736: If $Max is < any data point, the graph will not be rendered.
2737:
2738: =item $colors: array ref holding the colors to be used for the data sets when
2739: they are plotted. If undefined, default values will be used.
2740:
2741: =item @Values: An array of array references. Each array reference holds data
2742: to be plotted in a stacked bar chart.
2743:
2744: =back
2745:
2746: Returns:
2747:
2748: An <img> tag which references graph.png and the appropriate identifying
2749: information for the plot.
2750:
2751: =cut
2752:
2753: ############################################################
2754: ############################################################
2755: sub DrawBarGraph {
2756: my ($Title,$xlabel,$ylabel,$Max,$colors,@Values)=@_;
2757: #
2758: if (! defined($colors)) {
2759: $colors = ['#33ff00',
2760: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
2761: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
2762: ];
2763: }
2764: #
2765: my $identifier = &get_cgi_id();
2766: my $id = 'cgi.'.$identifier;
2767: if (! @Values || ref($Values[0]) ne 'ARRAY') {
2768: return '';
2769: }
2770: my $NumBars = scalar(@{$Values[0]});
2771: my %ValuesHash;
2772: my $NumSets=1;
2773: foreach my $array (@Values) {
2774: next if (! ref($array));
2775: $ValuesHash{$id.'.data.'.$NumSets++} =
2776: join(',',@$array);
2777: }
2778: #
2779: my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
2780: if ($NumBars < 10) {
2781: $width = 120+$NumBars*15;
2782: $xskip = 1;
2783: $bar_width = 15;
2784: } elsif ($NumBars <= 25) {
2785: $width = 120+$NumBars*11;
2786: $xskip = 5;
2787: $bar_width = 8;
2788: } elsif ($NumBars <= 50) {
2789: $width = 120+$NumBars*8;
2790: $xskip = 5;
2791: $bar_width = 4;
2792: } else {
2793: $width = 120+$NumBars*8;
2794: $xskip = 5;
2795: $bar_width = 4;
2796: }
2797: #
2798: my @Labels;
2799: for (my $i=0;$i<@{$Values[0]};$i++) {
2800: push (@Labels,$i+1);
2801: }
2802: #
2803: $Max = 1 if ($Max < 1);
2804: if ( int($Max) < $Max ) {
2805: $Max++;
2806: $Max = int($Max);
2807: }
2808: $Title = '' if (! defined($Title));
2809: $xlabel = '' if (! defined($xlabel));
2810: $ylabel = '' if (! defined($ylabel));
2811: $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
2812: $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
2813: $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
2814: $ValuesHash{$id.'.y_max_value'} = $Max;
2815: $ValuesHash{$id.'.NumBars'} = $NumBars;
2816: $ValuesHash{$id.'.NumSets'} = $NumSets;
2817: $ValuesHash{$id.'.PlotType'} = 'bar';
2818: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2819: $ValuesHash{$id.'.height'} = $height;
2820: $ValuesHash{$id.'.width'} = $width;
2821: $ValuesHash{$id.'.xskip'} = $xskip;
2822: $ValuesHash{$id.'.bar_width'} = $bar_width;
2823: $ValuesHash{$id.'.labels'} = join(',',@Labels);
2824: #
2825: &Apache::lonnet::appenv(%ValuesHash);
2826: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2827: }
2828:
2829: ############################################################
2830: ############################################################
2831:
2832: =pod
2833:
2834: =item DrawXYGraph
2835:
2836: Facilitates the plotting of data in an XY graph.
2837: Puts plot definition data into the users environment in order for
2838: graph.png to plot it. Returns an <img> tag for the plot.
2839:
2840: Inputs:
2841:
2842: =over 4
2843:
2844: =item $Title: string, the title of the plot
2845:
2846: =item $xlabel: string, text describing the X-axis of the plot
2847:
2848: =item $ylabel: string, text describing the Y-axis of the plot
2849:
2850: =item $Max: scalar, the maximum Y value to use in the plot
2851: If $Max is < any data point, the graph will not be rendered.
2852:
2853: =item $colors: Array ref containing the hex color codes for the data to be
2854: plotted in. If undefined, default values will be used.
2855:
2856: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2857:
2858: =item $Ydata: Array ref containing Array refs.
2859: Each of the contained arrays will be plotted as a seperate curve.
2860:
2861: =item %Values: hash indicating or overriding any default values which are
2862: passed to graph.png.
2863: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2864:
2865: =back
2866:
2867: Returns:
2868:
2869: An <img> tag which references graph.png and the appropriate identifying
2870: information for the plot.
2871:
2872: =cut
2873:
2874: ############################################################
2875: ############################################################
2876: sub DrawXYGraph {
2877: my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
2878: #
2879: # Create the identifier for the graph
2880: my $identifier = &get_cgi_id();
2881: my $id = 'cgi.'.$identifier;
2882: #
2883: $Title = '' if (! defined($Title));
2884: $xlabel = '' if (! defined($xlabel));
2885: $ylabel = '' if (! defined($ylabel));
2886: my %ValuesHash =
2887: (
2888: $id.'.title' => &Apache::lonnet::escape($Title),
2889: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
2890: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
2891: $id.'.y_max_value'=> $Max,
2892: $id.'.labels' => join(',',@$Xlabels),
2893: $id.'.PlotType' => 'XY',
2894: );
2895: #
2896: if (defined($colors) && ref($colors) eq 'ARRAY') {
2897: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2898: }
2899: #
2900: if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
2901: return '';
2902: }
2903: my $NumSets=1;
2904: foreach my $array (@{$Ydata}){
2905: next if (! ref($array));
2906: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
2907: }
2908: $ValuesHash{$id.'.NumSets'} = $NumSets-1;
2909: #
2910: # Deal with other parameters
2911: while (my ($key,$value) = each(%Values)) {
2912: $ValuesHash{$id.'.'.$key} = $value;
2913: }
2914: #
2915: &Apache::lonnet::appenv(%ValuesHash);
2916: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2917: }
2918:
2919: ############################################################
2920: ############################################################
2921:
2922: =pod
2923:
2924: =item DrawXYYGraph
2925:
2926: Facilitates the plotting of data in an XY graph with two Y axes.
2927: Puts plot definition data into the users environment in order for
2928: graph.png to plot it. Returns an <img> tag for the plot.
2929:
2930: Inputs:
2931:
2932: =over 4
2933:
2934: =item $Title: string, the title of the plot
2935:
2936: =item $xlabel: string, text describing the X-axis of the plot
2937:
2938: =item $ylabel: string, text describing the Y-axis of the plot
2939:
2940: =item $colors: Array ref containing the hex color codes for the data to be
2941: plotted in. If undefined, default values will be used.
2942:
2943: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2944:
2945: =item $Ydata1: The first data set
2946:
2947: =item $Min1: The minimum value of the left Y-axis
2948:
2949: =item $Max1: The maximum value of the left Y-axis
2950:
2951: =item $Ydata2: The second data set
2952:
2953: =item $Min2: The minimum value of the right Y-axis
2954:
2955: =item $Max2: The maximum value of the left Y-axis
2956:
2957: =item %Values: hash indicating or overriding any default values which are
2958: passed to graph.png.
2959: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2960:
2961: =back
2962:
2963: Returns:
2964:
2965: An <img> tag which references graph.png and the appropriate identifying
2966: information for the plot.
2967:
2968: =cut
2969:
2970: ############################################################
2971: ############################################################
2972: sub DrawXYYGraph {
2973: my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
2974: $Ydata2,$Min2,$Max2,%Values)=@_;
2975: #
2976: # Create the identifier for the graph
2977: my $identifier = &get_cgi_id();
2978: my $id = 'cgi.'.$identifier;
2979: #
2980: $Title = '' if (! defined($Title));
2981: $xlabel = '' if (! defined($xlabel));
2982: $ylabel = '' if (! defined($ylabel));
2983: my %ValuesHash =
2984: (
2985: $id.'.title' => &Apache::lonnet::escape($Title),
2986: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
2987: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
2988: $id.'.labels' => join(',',@$Xlabels),
2989: $id.'.PlotType' => 'XY',
2990: $id.'.NumSets' => 2,
2991: $id.'.two_axes' => 1,
2992: $id.'.y1_max_value' => $Max1,
2993: $id.'.y1_min_value' => $Min1,
2994: $id.'.y2_max_value' => $Max2,
2995: $id.'.y2_min_value' => $Min2,
2996: );
2997: #
2998: if (defined($colors) && ref($colors) eq 'ARRAY') {
2999: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3000: }
3001: #
3002: if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
3003: ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
3004: return '';
3005: }
3006: my $NumSets=1;
3007: foreach my $array ($Ydata1,$Ydata2){
3008: next if (! ref($array));
3009: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3010: }
3011: #
3012: # Deal with other parameters
3013: while (my ($key,$value) = each(%Values)) {
3014: $ValuesHash{$id.'.'.$key} = $value;
3015: }
3016: #
3017: &Apache::lonnet::appenv(%ValuesHash);
3018: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3019: }
3020:
3021: ############################################################
3022: ############################################################
3023:
3024: =pod
3025:
3026: =head1 Statistics helper routines?
3027:
3028: Bad place for them but what the hell.
3029:
3030: =item &chartlink
3031:
3032: Returns a link to the chart for a specific student.
3033:
3034: Inputs:
3035:
3036: =over 4
3037:
3038: =item $linktext: The text of the link
3039:
3040: =item $sname: The students username
3041:
3042: =item $sdomain: The students domain
3043:
3044: =back
3045:
3046: =cut
3047:
3048: ############################################################
3049: ############################################################
3050: sub chartlink {
3051: my ($linktext, $sname, $sdomain) = @_;
3052: my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
3053: '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
3054: '&chartoutputmode='.HTML::Entities::encode('html, with all links').
3055: '">'.$linktext.'</a>';
3056: }
3057:
3058: ############################################################
3059: ############################################################
3060:
3061: =pod
3062:
3063: =back
3064:
3065: =cut
3066:
3067: 1;
3068: __END__;
3069:
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