1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.151 2003/11/10 20:30:45 www 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: # %Keywords:
96: # A hash used by &keyword to determine if a word is considered a keyword.
97: # $thesaurus_db_file
98: # Scalar containing the full path to the thesaurus database.
99:
100: my %Keywords;
101: my $thesaurus_db_file;
102:
103: #
104: # Initialize values from language.tab, copyright.tab, filetypes.tab,
105: # thesaurus.tab, and filecategories.tab.
106: #
107: BEGIN {
108: # Variable initialization
109: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
110: #
111: unless ($readit) {
112: # ------------------------------------------------------------------- languages
113: {
114: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
115: '/language.tab');
116: if ($fh) {
117: while (<$fh>) {
118: next if /^\#/;
119: chomp;
120: my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
121: $language{$key}=$val.' - '.$enc;
122: if ($sup) {
123: $supported_language{$key}=$sup;
124: }
125: }
126: }
127: }
128: # ------------------------------------------------------------------ copyrights
129: {
130: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
131: '/copyright.tab');
132: if ($fh) {
133: while (<$fh>) {
134: next if /^\#/;
135: chomp;
136: my ($key,$val)=(split(/\s+/,$_,2));
137: $cprtag{$key}=$val;
138: }
139: }
140: }
141:
142: # -------------------------------------------------------------- domain designs
143:
144: my $filename;
145: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
146: opendir(DIR,$designdir);
147: while ($filename=readdir(DIR)) {
148: my ($domain)=($filename=~/^(\w+)\./);
149: {
150: my $fh=Apache::File->new($designdir.'/'.$filename);
151: if ($fh) {
152: while (<$fh>) {
153: next if /^\#/;
154: chomp;
155: my ($key,$val)=(split(/\=/,$_));
156: if ($val) { $designhash{$domain.'.'.$key}=$val; }
157: }
158: }
159: }
160:
161: }
162: closedir(DIR);
163:
164:
165: # ------------------------------------------------------------- file categories
166: {
167: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
168: '/filecategories.tab');
169: if ($fh) {
170: while (<$fh>) {
171: next if /^\#/;
172: chomp;
173: my ($extension,$category)=(split(/\s+/,$_,2));
174: push @{$category_extensions{lc($category)}},$extension;
175: }
176: }
177: }
178: # ------------------------------------------------------------------ file types
179: {
180: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
181: '/filetypes.tab');
182: if ($fh) {
183: while (<$fh>) {
184: next if (/^\#/);
185: chomp;
186: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
187: if ($descr ne '') {
188: $fe{$ending}=lc($emb);
189: $fd{$ending}=$descr;
190: }
191: }
192: }
193: }
194: &Apache::lonnet::logthis(
195: "<font color=yellow>INFO: Read file types</font>");
196: $readit=1;
197: } # end of unless($readit)
198:
199: }
200:
201: ###############################################################
202: ## HTML and Javascript Helper Functions ##
203: ###############################################################
204:
205: =pod
206:
207: =head1 General Subroutines
208:
209: =over 4
210:
211: =head1 HTML and Javascript Functions
212:
213: =over 4
214:
215: =item * browser_and_searcher_javascript ()
216:
217: X<browsing, javascript>X<searching, javascript>Returns a string
218: containing javascript with two functions, C<openbrowser> and
219: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
220: tags.
221:
222: =over 4
223:
224: =item * openbrowser(formname,elementname,only,omit) [javascript]
225:
226: inputs: formname, elementname, only, omit
227:
228: formname and elementname indicate the name of the html form and name of
229: the element that the results of the browsing selection are to be placed in.
230:
231: Specifying 'only' will restrict the browser to displaying only files
232: with the given extension. Can be a comma seperated list.
233:
234: Specifying 'omit' will restrict the browser to NOT displaying files
235: with the given extension. Can be a comma seperated list.
236:
237: =item * opensearcher(formname, elementname) [javascript]
238:
239: Inputs: formname, elementname
240:
241: formname and elementname specify the name of the html form and the name
242: of the element the selection from the search results will be placed in.
243:
244: =back
245:
246: =cut
247:
248: sub browser_and_searcher_javascript {
249: return <<END;
250: var editbrowser = null;
251: function openbrowser(formname,elementname,only,omit,titleelement) {
252: var url = '/res/?';
253: if (editbrowser == null) {
254: url += 'launch=1&';
255: }
256: url += 'catalogmode=interactive&';
257: url += 'mode=edit&';
258: url += 'form=' + formname + '&';
259: if (only != null) {
260: url += 'only=' + only + '&';
261: }
262: if (omit != null) {
263: url += 'omit=' + omit + '&';
264: }
265: if (titleelement != null) {
266: url += 'titleelement=' + titleelement + '&';
267: }
268: url += 'element=' + elementname + '';
269: var title = 'Browser';
270: var options = 'scrollbars=1,resizable=1,menubar=0';
271: options += ',width=700,height=600';
272: editbrowser = open(url,title,options,'1');
273: editbrowser.focus();
274: }
275: var editsearcher;
276: function opensearcher(formname,elementname,titleelement) {
277: var url = '/adm/searchcat?';
278: if (editsearcher == null) {
279: url += 'launch=1&';
280: }
281: url += 'catalogmode=interactive&';
282: url += 'mode=edit&';
283: url += 'form=' + formname + '&';
284: if (titleelement != null) {
285: url += 'titleelement=' + titleelement + '&';
286: }
287: url += 'element=' + elementname + '';
288: var title = 'Search';
289: var options = 'scrollbars=1,resizable=1,menubar=0';
290: options += ',width=700,height=600';
291: editsearcher = open(url,title,options,'1');
292: editsearcher.focus();
293: }
294: END
295: }
296:
297: sub studentbrowser_javascript {
298: unless (
299: (($ENV{'request.course.id'}) &&
300: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
301: || ($ENV{'request.role'}=~/^(au|dc|su)/)
302: ) { return ''; }
303: return (<<'ENDSTDBRW');
304: <script type="text/javascript" language="Javascript" >
305: var stdeditbrowser;
306: function openstdbrowser(formname,uname,udom,roleflag) {
307: var url = '/adm/pickstudent?';
308: var filter;
309: eval('filter=document.'+formname+'.'+uname+'.value;');
310: if (filter != null) {
311: if (filter != '') {
312: url += 'filter='+filter+'&';
313: }
314: }
315: url += 'form=' + formname + '&unameelement='+uname+
316: '&udomelement='+udom;
317: if (roleflag) { url+="&roles=1"; }
318: var title = 'Student_Browser';
319: var options = 'scrollbars=1,resizable=1,menubar=0';
320: options += ',width=700,height=600';
321: stdeditbrowser = open(url,title,options,'1');
322: stdeditbrowser.focus();
323: }
324: </script>
325: ENDSTDBRW
326: }
327:
328: sub selectstudent_link {
329: my ($form,$unameele,$udomele)=@_;
330: if ($ENV{'request.course.id'}) {
331: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
332: return '';
333: }
334: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
335: '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
336: }
337: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
338: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
339: '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
340: }
341: return '';
342: }
343:
344: sub coursebrowser_javascript {
345: my ($domainfilter)=@_;
346: return (<<ENDSTDBRW);
347: <script type="text/javascript" language="Javascript" >
348: var stdeditbrowser;
349: function opencrsbrowser(formname,uname,udom) {
350: var url = '/adm/pickcourse?';
351: var filter;
352: if (filter != null) {
353: if (filter != '') {
354: url += 'filter='+filter+'&';
355: }
356: }
357: var domainfilter='$domainfilter';
358: if (domainfilter != null) {
359: if (domainfilter != '') {
360: url += 'domainfilter='+domainfilter+'&';
361: }
362: }
363: url += 'form=' + formname + '&cnumelement='+uname+
364: '&cdomelement='+udom;
365: var title = 'Course_Browser';
366: var options = 'scrollbars=1,resizable=1,menubar=0';
367: options += ',width=700,height=600';
368: stdeditbrowser = open(url,title,options,'1');
369: stdeditbrowser.focus();
370: }
371: </script>
372: ENDSTDBRW
373: }
374:
375: sub selectcourse_link {
376: my ($form,$unameele,$udomele)=@_;
377: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
378: '","'.$udomele.'");'."'>".&mt('Select Course')."</a>";
379: }
380:
381: =pod
382:
383: =item * linked_select_forms(...)
384:
385: linked_select_forms returns a string containing a <script></script> block
386: and html for two <select> menus. The select menus will be linked in that
387: changing the value of the first menu will result in new values being placed
388: in the second menu. The values in the select menu will appear in alphabetical
389: order.
390:
391: linked_select_forms takes the following ordered inputs:
392:
393: =over 4
394:
395: =item * $formname, the name of the <form> tag
396:
397: =item * $middletext, the text which appears between the <select> tags
398:
399: =item * $firstdefault, the default value for the first menu
400:
401: =item * $firstselectname, the name of the first <select> tag
402:
403: =item * $secondselectname, the name of the second <select> tag
404:
405: =item * $hashref, a reference to a hash containing the data for the menus.
406:
407: =back
408:
409: Below is an example of such a hash. Only the 'text', 'default', and
410: 'select2' keys must appear as stated. keys(%menu) are the possible
411: values for the first select menu. The text that coincides with the
412: first menu value is given in $menu{$choice1}->{'text'}. The values
413: and text for the second menu are given in the hash pointed to by
414: $menu{$choice1}->{'select2'}.
415:
416: my %menu = ( A1 => { text =>"Choice A1" ,
417: default => "B3",
418: select2 => {
419: B1 => "Choice B1",
420: B2 => "Choice B2",
421: B3 => "Choice B3",
422: B4 => "Choice B4"
423: }
424: },
425: A2 => { text =>"Choice A2" ,
426: default => "C2",
427: select2 => {
428: C1 => "Choice C1",
429: C2 => "Choice C2",
430: C3 => "Choice C3"
431: }
432: },
433: A3 => { text =>"Choice A3" ,
434: default => "D6",
435: select2 => {
436: D1 => "Choice D1",
437: D2 => "Choice D2",
438: D3 => "Choice D3",
439: D4 => "Choice D4",
440: D5 => "Choice D5",
441: D6 => "Choice D6",
442: D7 => "Choice D7"
443: }
444: }
445: );
446:
447: =cut
448:
449: sub linked_select_forms {
450: my ($formname,
451: $middletext,
452: $firstdefault,
453: $firstselectname,
454: $secondselectname,
455: $hashref
456: ) = @_;
457: my $second = "document.$formname.$secondselectname";
458: my $first = "document.$formname.$firstselectname";
459: # output the javascript to do the changing
460: my $result = '';
461: $result.="<script>\n";
462: $result.="var select2data = new Object();\n";
463: $" = '","';
464: my $debug = '';
465: foreach my $s1 (sort(keys(%$hashref))) {
466: $result.="select2data.d_$s1 = new Object();\n";
467: $result.="select2data.d_$s1.def = new String('".
468: $hashref->{$s1}->{'default'}."');\n";
469: $result.="select2data.d_$s1.values = new Array(";
470: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
471: $result.="\"@s2values\");\n";
472: $result.="select2data.d_$s1.texts = new Array(";
473: my @s2texts;
474: foreach my $value (@s2values) {
475: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
476: }
477: $result.="\"@s2texts\");\n";
478: }
479: $"=' ';
480: $result.= <<"END";
481:
482: function select1_changed() {
483: // Determine new choice
484: var newvalue = "d_" + $first.value;
485: // update select2
486: var values = select2data[newvalue].values;
487: var texts = select2data[newvalue].texts;
488: var select2def = select2data[newvalue].def;
489: var i;
490: // out with the old
491: for (i = 0; i < $second.options.length; i++) {
492: $second.options[i] = null;
493: }
494: // in with the nuclear
495: for (i=0;i<values.length; i++) {
496: $second.options[i] = new Option(values[i]);
497: $second.options[i].value = values[i];
498: $second.options[i].text = texts[i];
499: if (values[i] == select2def) {
500: $second.options[i].selected = true;
501: }
502: }
503: }
504: </script>
505: END
506: # output the initial values for the selection lists
507: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
508: foreach my $value (sort(keys(%$hashref))) {
509: $result.=" <option value=\"$value\" ";
510: $result.=" selected=\"true\" " if ($value eq $firstdefault);
511: $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
512: }
513: $result .= "</select>\n";
514: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
515: $result .= $middletext;
516: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
517: my $seconddefault = $hashref->{$firstdefault}->{'default'};
518: foreach my $value (sort(keys(%select2))) {
519: $result.=" <option value=\"$value\" ";
520: $result.=" selected=\"true\" " if ($value eq $seconddefault);
521: $result.=">".&mt($select2{$value})."</option>\n";
522: }
523: $result .= "</select>\n";
524: # return $debug;
525: return $result;
526: } # end of sub linked_select_forms {
527:
528: =pod
529:
530: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
531:
532: Returns a string corresponding to an HTML link to the given help
533: $topic, where $topic corresponds to the name of a .tex file in
534: /home/httpd/html/adm/help/tex, with underscores replaced by
535: spaces.
536:
537: $text will optionally be linked to the same topic, allowing you to
538: link text in addition to the graphic. If you do not want to link
539: text, but wish to specify one of the later parameters, pass an
540: empty string.
541:
542: $stayOnPage is a value that will be interpreted as a boolean. If true,
543: the link will not open a new window. If false, the link will open
544: a new window using Javascript. (Default is false.)
545:
546: $width and $height are optional numerical parameters that will
547: override the width and height of the popped up window, which may
548: be useful for certain help topics with big pictures included.
549:
550: =cut
551:
552: sub help_open_topic {
553: my ($topic, $text, $stayOnPage, $width, $height) = @_;
554: $text = "" if (not defined $text);
555: $stayOnPage = 0 if (not defined $stayOnPage);
556: if ($ENV{'browser.interface'} eq 'textual' ||
557: $ENV{'environment.remote'} eq 'off' ) {
558: $stayOnPage=1;
559: }
560: $width = 350 if (not defined $width);
561: $height = 400 if (not defined $height);
562: my $filename = $topic;
563: $filename =~ s/ /_/g;
564:
565: my $template = "";
566: my $link;
567:
568: if (!$stayOnPage)
569: {
570: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
571: }
572: else
573: {
574: $link = "/adm/help/${filename}.hlp";
575: }
576:
577: # Add the text
578: if ($text ne "")
579: {
580: $template .=
581: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
582: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
583: }
584:
585: # Add the graphic
586: $template .= <<"ENDTEMPLATE";
587: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
588: ENDTEMPLATE
589: if ($text ne '') { $template.='</td></tr></table>' };
590: return $template;
591:
592: }
593:
594: # This is a quicky function for Latex cheatsheet editing, since it
595: # appears in at least four places
596: sub helpLatexCheatsheet {
597: my $other = shift;
598: my $addOther = '';
599: if ($other) {
600: $addOther = Apache::loncommon::help_open_topic($other, shift,
601: undef, undef, 600) .
602: '</td><td>';
603: }
604: return '<table><tr><td>'.
605: $addOther .
606: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
607: undef,undef,600)
608: .'</td><td>'.
609: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
610: undef,undef,600)
611: .'</td></tr></table>';
612: }
613:
614: =pod
615:
616: =item * csv_translate($text)
617:
618: Translate $text to allow it to be output as a 'comma seperated values'
619: format.
620:
621: =cut
622:
623: sub csv_translate {
624: my $text = shift;
625: $text =~ s/\"/\"\"/g;
626: $text =~ s/\n//g;
627: return $text;
628: }
629:
630: =pod
631:
632: =item * change_content_javascript():
633:
634: This and the next function allow you to create small sections of an
635: otherwise static HTML page that you can update on the fly with
636: Javascript, even in Netscape 4.
637:
638: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
639: must be written to the HTML page once. It will prove the Javascript
640: function "change(name, content)". Calling the change function with the
641: name of the section
642: you want to update, matching the name passed to C<changable_area>, and
643: the new content you want to put in there, will put the content into
644: that area.
645:
646: B<Note>: Netscape 4 only reserves enough space for the changable area
647: to contain room for the original contents. You need to "make space"
648: for whatever changes you wish to make, and be B<sure> to check your
649: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
650: it's adequate for updating a one-line status display, but little more.
651: This script will set the space to 100% width, so you only need to
652: worry about height in Netscape 4.
653:
654: Modern browsers are much less limiting, and if you can commit to the
655: user not using Netscape 4, this feature may be used freely with
656: pretty much any HTML.
657:
658: =cut
659:
660: sub change_content_javascript {
661: # If we're on Netscape 4, we need to use Layer-based code
662: if ($ENV{'browser.type'} eq 'netscape' &&
663: $ENV{'browser.version'} =~ /^4\./) {
664: return (<<NETSCAPE4);
665: function change(name, content) {
666: doc = document.layers[name+"___escape"].layers[0].document;
667: doc.open();
668: doc.write(content);
669: doc.close();
670: }
671: NETSCAPE4
672: } else {
673: # Otherwise, we need to use semi-standards-compliant code
674: # (technically, "innerHTML" isn't standard but the equivalent
675: # is really scary, and every useful browser supports it
676: return (<<DOMBASED);
677: function change(name, content) {
678: element = document.getElementById(name);
679: element.innerHTML = content;
680: }
681: DOMBASED
682: }
683: }
684:
685: =pod
686:
687: =item * changable_area($name, $origContent):
688:
689: This provides a "changable area" that can be modified on the fly via
690: the Javascript code provided in C<change_content_javascript>. $name is
691: the name you will use to reference the area later; do not repeat the
692: same name on a given HTML page more then once. $origContent is what
693: the area will originally contain, which can be left blank.
694:
695: =cut
696:
697: sub changable_area {
698: my ($name, $origContent) = @_;
699:
700: if ($ENV{'browser.type'} eq 'netscape' &&
701: $ENV{'browser.version'} =~ /^4\./) {
702: # If this is netscape 4, we need to use the Layer tag
703: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
704: } else {
705: return "<span id='$name'>$origContent</span>";
706: }
707: }
708:
709: =pod
710:
711: =back
712:
713: =cut
714:
715: ###############################################################
716: ## Home server <option> list generating code ##
717: ###############################################################
718:
719: =pod
720:
721: =head1 Home Server option list generating code
722:
723: =over 4
724:
725: =item * get_domains()
726:
727: Returns an array containing each of the domains listed in the hosts.tab
728: file.
729:
730: =cut
731:
732: #-------------------------------------------
733: sub get_domains {
734: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
735: my @domains;
736: my %seen;
737: foreach (sort values(%Apache::lonnet::hostdom)) {
738: push (@domains,$_) unless $seen{$_}++;
739: }
740: return @domains;
741: }
742:
743: #-------------------------------------------
744:
745: =pod
746:
747: =item * select_form($defdom,$name,%hash)
748:
749: Returns a string containing a <select name='$name' size='1'> form to
750: allow a user to select options from a hash option_name => displayed text.
751: See lonrights.pm for an example invocation and use.
752:
753: =cut
754:
755: #-------------------------------------------
756: sub select_form {
757: my ($def,$name,%hash) = @_;
758: my $selectform = "<select name=\"$name\" size=\"1\">\n";
759: my @keys;
760: if (exists($hash{'select_form_order'})) {
761: @keys=@{$hash{'select_form_order'}};
762: } else {
763: @keys=sort(keys(%hash));
764: }
765: foreach (@keys) {
766: $selectform.="<option value=\"$_\" ".
767: ($_ eq $def ? 'selected' : '').
768: ">".&mt($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='<i>'.
1065: &mt('As a general rule, only authors or co-authors should be '.
1066: 'filesystem authenticated '.
1067: '(which allows access to the server filesystem).')."</i>\n";
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 = &mt('[_1] Do not change login data',
1078: '<input type="radio" name="login" value="nochange" '.
1079: 'checked="checked" onclick="'.
1080: "javascript:changed_radio('nochange',$in{'formname'});".'" />');
1081: return $result;
1082: }
1083:
1084: sub authform_kerberos{
1085: my %in = (
1086: formname => 'document.cu',
1087: kerb_def_dom => 'MSU.EDU',
1088: kerb_def_auth => 'krb4',
1089: @_,
1090: );
1091: my ($check4,$check5);
1092: if ($in{'kerb_def_auth'} eq 'krb5') {
1093: $check5 = " checked=\"on\"";
1094: } else {
1095: $check4 = " checked=\"on\"";
1096: }
1097: my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
1098: my $result .= &mt
1099: ('[_1] Kerberos authenticated with domain [_2] '.
1100: '[_3] Version 4 [_4] Version 5',
1101: '<input type="radio" name="login" value="krb" '.
1102: 'onclick="'.$jscall.'" onchange="'.$jscall.'" />',
1103: '<input type="text" size="10" name="krbarg" '.
1104: 'value="'.$in{'kerb_def_dom'}.'" '.
1105: 'onchange="'.$jscall.'" />',
1106: '<input type="radio" name="krbver" value="4" '.$check4.' />',
1107: '<input type="radio" name="krbver" value="5" '.$check5.' />');
1108: return $result;
1109: }
1110:
1111: sub authform_internal{
1112: my %args = (
1113: formname => 'document.cu',
1114: kerb_def_dom => 'MSU.EDU',
1115: @_,
1116: );
1117: my $jscall = "javascript:changed_radio('int',$args{'formname'});";
1118: my $result.=&mt
1119: ('[_1] Internally authenticated (with initial password [_2])',
1120: '<input type="radio" name="login" value="int" '.
1121: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1122: '<input type="text" size="10" name="intarg" value="" '.
1123: 'onchange="'.$jscall.'" />');
1124: return $result;
1125: }
1126:
1127: sub authform_local{
1128: my %in = (
1129: formname => 'document.cu',
1130: kerb_def_dom => 'MSU.EDU',
1131: @_,
1132: );
1133: my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
1134: my $result.=&mt('[_1] Local Authentication with arguement [_2]',
1135: '<input type="radio" name="login" value="loc" '.
1136: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1137: '<input type="text" size="10" name="locarg" value="" '.
1138: 'onchange="'.$jscall.'" />');
1139: return $result;
1140: }
1141:
1142: sub authform_filesystem{
1143: my %in = (
1144: formname => 'document.cu',
1145: kerb_def_dom => 'MSU.EDU',
1146: @_,
1147: );
1148: my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
1149: my $result.= &mt
1150: ('[_1] Filesystem Authenticated (with initial password [_2])',
1151: '<input type="radio" name="login" value="fsys" '.
1152: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1153: '<input type="text" size="10" name="fsysarg" value="" '.
1154: 'onchange="'.$jscall.'" />');
1155: return $result;
1156: }
1157:
1158: =pod
1159:
1160: =back
1161:
1162: =cut
1163:
1164: ###############################################################
1165: ## Get Authentication Defaults for Domain ##
1166: ###############################################################
1167:
1168: =pod
1169:
1170: =head1 Domains and Authentication
1171:
1172: Returns default authentication type and an associated argument as
1173: listed in file 'domain.tab'.
1174:
1175: =over 4
1176:
1177: =item * get_auth_defaults
1178:
1179: get_auth_defaults($target_domain) returns the default authentication
1180: type and an associated argument (initial password or a kerberos domain).
1181: These values are stored in lonTabs/domain.tab
1182:
1183: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1184:
1185: If target_domain is not found in domain.tab, returns nothing ('').
1186:
1187: =cut
1188:
1189: #-------------------------------------------
1190: sub get_auth_defaults {
1191: my $domain=shift;
1192: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1193: }
1194: ###############################################################
1195: ## End Get Authentication Defaults for Domain ##
1196: ###############################################################
1197:
1198: ###############################################################
1199: ## Get Kerberos Defaults for Domain ##
1200: ###############################################################
1201: ##
1202: ## Returns default kerberos version and an associated argument
1203: ## as listed in file domain.tab. If not listed, provides
1204: ## appropriate default domain and kerberos version.
1205: ##
1206: #-------------------------------------------
1207:
1208: =pod
1209:
1210: =item * get_kerberos_defaults
1211:
1212: get_kerberos_defaults($target_domain) returns the default kerberos
1213: version and domain. If not found in domain.tabs, it defaults to
1214: version 4 and the domain of the server.
1215:
1216: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1217:
1218: =cut
1219:
1220: #-------------------------------------------
1221: sub get_kerberos_defaults {
1222: my $domain=shift;
1223: my ($krbdef,$krbdefdom) =
1224: &Apache::loncommon::get_auth_defaults($domain);
1225: unless ($krbdef =~/^krb/ && $krbdefdom) {
1226: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1227: my $krbdefdom=$1;
1228: $krbdefdom=~tr/a-z/A-Z/;
1229: $krbdef = "krb4";
1230: }
1231: return ($krbdef,$krbdefdom);
1232: }
1233:
1234: =pod
1235:
1236: =back
1237:
1238: =cut
1239:
1240: ###############################################################
1241: ## Thesaurus Functions ##
1242: ###############################################################
1243:
1244: =pod
1245:
1246: =head1 Thesaurus Functions
1247:
1248: =over 4
1249:
1250: =item * initialize_keywords
1251:
1252: Initializes the package variable %Keywords if it is empty. Uses the
1253: package variable $thesaurus_db_file.
1254:
1255: =cut
1256:
1257: ###################################################
1258:
1259: sub initialize_keywords {
1260: return 1 if (scalar keys(%Keywords));
1261: # If we are here, %Keywords is empty, so fill it up
1262: # Make sure the file we need exists...
1263: if (! -e $thesaurus_db_file) {
1264: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1265: " failed because it does not exist");
1266: return 0;
1267: }
1268: # Set up the hash as a database
1269: my %thesaurus_db;
1270: if (! tie(%thesaurus_db,'GDBM_File',
1271: $thesaurus_db_file,&GDBM_READER(),0640)){
1272: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1273: $thesaurus_db_file);
1274: return 0;
1275: }
1276: # Get the average number of appearances of a word.
1277: my $avecount = $thesaurus_db{'average.count'};
1278: # Put keywords (those that appear > average) into %Keywords
1279: while (my ($word,$data)=each (%thesaurus_db)) {
1280: my ($count,undef) = split /:/,$data;
1281: $Keywords{$word}++ if ($count > $avecount);
1282: }
1283: untie %thesaurus_db;
1284: # Remove special values from %Keywords.
1285: foreach ('total.count','average.count') {
1286: delete($Keywords{$_}) if (exists($Keywords{$_}));
1287: }
1288: return 1;
1289: }
1290:
1291: ###################################################
1292:
1293: =pod
1294:
1295: =item * keyword($word)
1296:
1297: Returns true if $word is a keyword. A keyword is a word that appears more
1298: than the average number of times in the thesaurus database. Calls
1299: &initialize_keywords
1300:
1301: =cut
1302:
1303: ###################################################
1304:
1305: sub keyword {
1306: return if (!&initialize_keywords());
1307: my $word=lc(shift());
1308: $word=~s/\W//g;
1309: return exists($Keywords{$word});
1310: }
1311:
1312: ###############################################################
1313:
1314: =pod
1315:
1316: =item * get_related_words
1317:
1318: Look up a word in the thesaurus. Takes a scalar arguement and returns
1319: an array of words. If the keyword is not in the thesaurus, an empty array
1320: will be returned. The order of the words returned is determined by the
1321: database which holds them.
1322:
1323: Uses global $thesaurus_db_file.
1324:
1325: =cut
1326:
1327: ###############################################################
1328: sub get_related_words {
1329: my $keyword = shift;
1330: my %thesaurus_db;
1331: if (! -e $thesaurus_db_file) {
1332: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1333: "failed because the file does not exist");
1334: return ();
1335: }
1336: if (! tie(%thesaurus_db,'GDBM_File',
1337: $thesaurus_db_file,&GDBM_READER(),0640)){
1338: return ();
1339: }
1340: my @Words=();
1341: if (exists($thesaurus_db{$keyword})) {
1342: $_ = $thesaurus_db{$keyword};
1343: (undef,@Words) = split/:/; # The first element is the number of times
1344: # the word appears. We do not need it now.
1345: for (my $i=0;$i<=$#Words;$i++) {
1346: ($Words[$i],undef)= split/\,/,$Words[$i];
1347: }
1348: }
1349: untie %thesaurus_db;
1350: return @Words;
1351: }
1352:
1353: =pod
1354:
1355: =back
1356:
1357: =cut
1358:
1359: # -------------------------------------------------------------- Plaintext name
1360: =pod
1361:
1362: =head1 User Name Functions
1363:
1364: =over 4
1365:
1366: =item * plainname($uname,$udom)
1367:
1368: Takes a users logon name and returns it as a string in
1369: "first middle last generation" form
1370:
1371: =cut
1372:
1373: ###############################################################
1374: sub plainname {
1375: my ($uname,$udom)=@_;
1376: my %names=&Apache::lonnet::get('environment',
1377: ['firstname','middlename','lastname','generation'],
1378: $udom,$uname);
1379: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1380: $names{'lastname'}.' '.$names{'generation'};
1381: $name=~s/\s+$//;
1382: $name=~s/\s+/ /g;
1383: return $name;
1384: }
1385:
1386: # -------------------------------------------------------------------- Nickname
1387: =pod
1388:
1389: =item * nickname($uname,$udom)
1390:
1391: Gets a users name and returns it as a string as
1392:
1393: ""nickname""
1394:
1395: if the user has a nickname or
1396:
1397: "first middle last generation"
1398:
1399: if the user does not
1400:
1401: =cut
1402:
1403: sub nickname {
1404: my ($uname,$udom)=@_;
1405: my %names=&Apache::lonnet::get('environment',
1406: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1407: my $name=$names{'nickname'};
1408: if ($name) {
1409: $name='"'.$name.'"';
1410: } else {
1411: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1412: $names{'lastname'}.' '.$names{'generation'};
1413: $name=~s/\s+$//;
1414: $name=~s/\s+/ /g;
1415: }
1416: return $name;
1417: }
1418:
1419:
1420: # ------------------------------------------------------------------ Screenname
1421:
1422: =pod
1423:
1424: =item * screenname($uname,$udom)
1425:
1426: Gets a users screenname and returns it as a string
1427:
1428: =cut
1429:
1430: sub screenname {
1431: my ($uname,$udom)=@_;
1432: my %names=
1433: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1434: return $names{'screenname'};
1435: }
1436:
1437: # ------------------------------------------------------------- Message Wrapper
1438:
1439: sub messagewrapper {
1440: my ($link,$un,$do)=@_;
1441: return
1442: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1443: }
1444: # --------------------------------------------------------------- Notes Wrapper
1445:
1446: sub noteswrapper {
1447: my ($link,$un,$do)=@_;
1448: return
1449: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1450: }
1451: # ------------------------------------------------------------- Aboutme Wrapper
1452:
1453: sub aboutmewrapper {
1454: my ($link,$username,$domain)=@_;
1455: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1456: }
1457:
1458: # ------------------------------------------------------------ Syllabus Wrapper
1459:
1460:
1461: sub syllabuswrapper {
1462: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1463: if ($fontcolor) {
1464: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1465: }
1466: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1467: }
1468:
1469: =pod
1470:
1471: =back
1472:
1473: =head1 Access .tab File Data
1474:
1475: =over 4
1476:
1477: =item * languageids()
1478:
1479: returns list of all language ids
1480:
1481: =cut
1482:
1483: sub languageids {
1484: return sort(keys(%language));
1485: }
1486:
1487: =pod
1488:
1489: =item * languagedescription()
1490:
1491: returns description of a specified language id
1492:
1493: =cut
1494:
1495: sub languagedescription {
1496: my $code=shift;
1497: return ($supported_language{$code}?'* ':'').
1498: $language{$code}.
1499: ($supported_language{$code}?' ('.&mt('interface available').')':'');
1500: }
1501:
1502: sub plainlanguagedescription {
1503: my $code=shift;
1504: return $language{$code};
1505: }
1506:
1507: sub supportedlanguagecode {
1508: my $code=shift;
1509: return $supported_language{$code};
1510: }
1511:
1512: =pod
1513:
1514: =item * copyrightids()
1515:
1516: returns list of all copyrights
1517:
1518: =cut
1519:
1520: sub copyrightids {
1521: return sort(keys(%cprtag));
1522: }
1523:
1524: =pod
1525:
1526: =item * copyrightdescription()
1527:
1528: returns description of a specified copyright id
1529:
1530: =cut
1531:
1532: sub copyrightdescription {
1533: return $cprtag{shift(@_)};
1534: }
1535:
1536: =pod
1537:
1538: =item * filecategories()
1539:
1540: returns list of all file categories
1541:
1542: =cut
1543:
1544: sub filecategories {
1545: return sort(keys(%category_extensions));
1546: }
1547:
1548: =pod
1549:
1550: =item * filecategorytypes()
1551:
1552: returns list of file types belonging to a given file
1553: category
1554:
1555: =cut
1556:
1557: sub filecategorytypes {
1558: return @{$category_extensions{lc($_[0])}};
1559: }
1560:
1561: =pod
1562:
1563: =item * fileembstyle()
1564:
1565: returns embedding style for a specified file type
1566:
1567: =cut
1568:
1569: sub fileembstyle {
1570: return $fe{lc(shift(@_))};
1571: }
1572:
1573: =pod
1574:
1575: =item * filedescription()
1576:
1577: returns description for a specified file type
1578:
1579: =cut
1580:
1581: sub filedescription {
1582: return $fd{lc(shift(@_))};
1583: }
1584:
1585: =pod
1586:
1587: =item * filedescriptionex()
1588:
1589: returns description for a specified file type with
1590: extra formatting
1591:
1592: =cut
1593:
1594: sub filedescriptionex {
1595: my $ex=shift;
1596: return '.'.$ex.' '.$fd{lc($ex)};
1597: }
1598:
1599: # End of .tab access
1600: =pod
1601:
1602: =back
1603:
1604: =cut
1605:
1606: # ------------------------------------------------------------------ File Types
1607: sub fileextensions {
1608: return sort(keys(%fe));
1609: }
1610:
1611: # ----------------------------------------------------------- Display Languages
1612: # returns a hash with all desired display languages
1613: #
1614:
1615: sub display_languages {
1616: my %languages=();
1617: foreach (&preferred_languages()) {
1618: $languages{$_}=1;
1619: }
1620: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1621: if ($ENV{'form.displaylanguage'}) {
1622: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1623: $languages{$_}=1;
1624: }
1625: }
1626: return %languages;
1627: }
1628:
1629: sub preferred_languages {
1630: my @languages=();
1631: if ($ENV{'environment.languages'}) {
1632: @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
1633: }
1634: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1635: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
1636: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
1637: }
1638: my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
1639: if ($browser) {
1640: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
1641: }
1642: if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
1643: @languages=(@languages,
1644: $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
1645: }
1646: if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
1647: @languages=(@languages,
1648: $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
1649: }
1650: if ($Apache::lonnet::domain_lang_def{
1651: $Apache::lonnet::perlvar{'lonDefDomain'}}) {
1652: @languages=(@languages,
1653: $Apache::lonnet::domain_lang_def{
1654: $Apache::lonnet::perlvar{'lonDefDomain'}});
1655: }
1656: # turn "en-ca" into "en-ca,en"
1657: my @genlanguages;
1658: foreach (@languages) {
1659: unless ($_=~/\w/) { next; }
1660: push (@genlanguages,$_);
1661: if ($_=~/(\-|\_)/) {
1662: push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
1663: }
1664: }
1665: return @genlanguages;
1666: }
1667:
1668: ###############################################################
1669: ## Student Answer Attempts ##
1670: ###############################################################
1671:
1672: =pod
1673:
1674: =head1 Alternate Problem Views
1675:
1676: =over 4
1677:
1678: =item * get_previous_attempt($symb, $username, $domain, $course,
1679: $getattempt, $regexp, $gradesub)
1680:
1681: Return string with previous attempt on problem. Arguments:
1682:
1683: =over 4
1684:
1685: =item * $symb: Problem, including path
1686:
1687: =item * $username: username of the desired student
1688:
1689: =item * $domain: domain of the desired student
1690:
1691: =item * $course: Course ID
1692:
1693: =item * $getattempt: Leave blank for all attempts, otherwise put
1694: something
1695:
1696: =item * $regexp: if string matches this regexp, the string will be
1697: sent to $gradesub
1698:
1699: =item * $gradesub: routine that processes the string if it matches $regexp
1700:
1701: =back
1702:
1703: The output string is a table containing all desired attempts, if any.
1704:
1705: =cut
1706:
1707: sub get_previous_attempt {
1708: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1709: my $prevattempts='';
1710: no strict 'refs';
1711: if ($symb) {
1712: my (%returnhash)=
1713: &Apache::lonnet::restore($symb,$course,$domain,$username);
1714: if ($returnhash{'version'}) {
1715: my %lasthash=();
1716: my $version;
1717: for ($version=1;$version<=$returnhash{'version'};$version++) {
1718: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1719: $lasthash{$_}=$returnhash{$version.':'.$_};
1720: }
1721: }
1722: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1723: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1724: foreach (sort(keys %lasthash)) {
1725: my ($ign,@parts) = split(/\./,$_);
1726: if ($#parts > 0) {
1727: my $data=$parts[-1];
1728: pop(@parts);
1729: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1730: } else {
1731: if ($#parts == 0) {
1732: $prevattempts.='<th>'.$parts[0].'</th>';
1733: } else {
1734: $prevattempts.='<th>'.$ign.'</th>';
1735: }
1736: }
1737: }
1738: if ($getattempt eq '') {
1739: for ($version=1;$version<=$returnhash{'version'};$version++) {
1740: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1741: foreach (sort(keys %lasthash)) {
1742: my $value;
1743: if ($_ =~ /timestamp/) {
1744: $value=scalar(localtime($returnhash{$version.':'.$_}));
1745: } else {
1746: $value=$returnhash{$version.':'.$_};
1747: }
1748: $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
1749: }
1750: }
1751: }
1752: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1753: foreach (sort(keys %lasthash)) {
1754: my $value;
1755: if ($_ =~ /timestamp/) {
1756: $value=scalar(localtime($lasthash{$_}));
1757: } else {
1758: $value=$lasthash{$_};
1759: }
1760: $value=&Apache::lonnet::unescape($value);
1761: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1762: $prevattempts.='<td>'.$value.' </td>';
1763: }
1764: $prevattempts.='</tr></table></td></tr></table>';
1765: } else {
1766: $prevattempts='Nothing submitted - no attempts.';
1767: }
1768: } else {
1769: $prevattempts='No data.';
1770: }
1771: }
1772:
1773: sub relative_to_absolute {
1774: my ($url,$output)=@_;
1775: my $parser=HTML::TokeParser->new(\$output);
1776: my $token;
1777: my $thisdir=$url;
1778: my @rlinks=();
1779: while ($token=$parser->get_token) {
1780: if ($token->[0] eq 'S') {
1781: if ($token->[1] eq 'a') {
1782: if ($token->[2]->{'href'}) {
1783: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1784: }
1785: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1786: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1787: } elsif ($token->[1] eq 'base') {
1788: $thisdir=$token->[2]->{'href'};
1789: }
1790: }
1791: }
1792: $thisdir=~s-/[^/]*$--;
1793: foreach (@rlinks) {
1794: unless (($_=~/^http:\/\//i) ||
1795: ($_=~/^\//) ||
1796: ($_=~/^javascript:/i) ||
1797: ($_=~/^mailto:/i) ||
1798: ($_=~/^\#/)) {
1799: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1800: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1801: }
1802: }
1803: # -------------------------------------------------- Deal with Applet codebases
1804: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1805: return $output;
1806: }
1807:
1808: =pod
1809:
1810: =item * get_student_view
1811:
1812: show a snapshot of what student was looking at
1813:
1814: =cut
1815:
1816: sub get_student_view {
1817: my ($symb,$username,$domain,$courseid,$target) = @_;
1818: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1819: my (%old,%moreenv);
1820: my @elements=('symb','courseid','domain','username');
1821: foreach my $element (@elements) {
1822: $old{$element}=$ENV{'form.grade_'.$element};
1823: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1824: }
1825: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1826: &Apache::lonnet::appenv(%moreenv);
1827: $feedurl=&Apache::lonnet::clutter($feedurl);
1828: my $userview=&Apache::lonnet::ssi_body($feedurl);
1829: &Apache::lonnet::delenv('form.grade_');
1830: foreach my $element (@elements) {
1831: $ENV{'form.grade_'.$element}=$old{$element};
1832: }
1833: $userview=~s/\<body[^\>]*\>//gi;
1834: $userview=~s/\<\/body\>//gi;
1835: $userview=~s/\<html\>//gi;
1836: $userview=~s/\<\/html\>//gi;
1837: $userview=~s/\<head\>//gi;
1838: $userview=~s/\<\/head\>//gi;
1839: $userview=~s/action\s*\=/would_be_action\=/gi;
1840: $userview=&relative_to_absolute($feedurl,$userview);
1841: return $userview;
1842: }
1843:
1844: =pod
1845:
1846: =item * get_student_answers()
1847:
1848: show a snapshot of how student was answering problem
1849:
1850: =cut
1851:
1852: sub get_student_answers {
1853: my ($symb,$username,$domain,$courseid,%form) = @_;
1854: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1855: my (%old,%moreenv);
1856: my @elements=('symb','courseid','domain','username');
1857: foreach my $element (@elements) {
1858: $old{$element}=$ENV{'form.grade_'.$element};
1859: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1860: }
1861: $moreenv{'form.grade_target'}='answer';
1862: &Apache::lonnet::appenv(%moreenv);
1863: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1864: &Apache::lonnet::delenv('form.grade_');
1865: foreach my $element (@elements) {
1866: $ENV{'form.grade_'.$element}=$old{$element};
1867: }
1868: return $userview;
1869: }
1870:
1871: =pod
1872:
1873: =item * &submlink()
1874:
1875: Inputs: $text $uname $udom $symb
1876:
1877: Returns: A link to grades.pm such as to see the SUBM view of a student
1878:
1879: =cut
1880:
1881: ###############################################
1882: sub submlink {
1883: my ($text,$uname,$udom,$symb)=@_;
1884: if (!($uname && $udom)) {
1885: (my $cursymb, my $courseid,$udom,$uname)=
1886: &Apache::lonxml::whichuser($symb);
1887: if (!$symb) { $symb=$cursymb; }
1888: }
1889: if (!$symb) { $symb=&symbread(); }
1890: return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
1891: '&userdom='.$udom.'&command=submission">'.$text.'</a>';
1892: }
1893: ##############################################
1894:
1895: =pod
1896:
1897: =back
1898:
1899: =cut
1900:
1901: ###############################################
1902:
1903:
1904: sub timehash {
1905: my @ltime=localtime(shift);
1906: return ( 'seconds' => $ltime[0],
1907: 'minutes' => $ltime[1],
1908: 'hours' => $ltime[2],
1909: 'day' => $ltime[3],
1910: 'month' => $ltime[4]+1,
1911: 'year' => $ltime[5]+1900,
1912: 'weekday' => $ltime[6],
1913: 'dayyear' => $ltime[7]+1,
1914: 'dlsav' => $ltime[8] );
1915: }
1916:
1917: sub maketime {
1918: my %th=@_;
1919: return POSIX::mktime(
1920: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1921: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1922: }
1923:
1924:
1925: #########################################
1926: #
1927: # Retro-fixing of un-backward-compatible time format
1928:
1929: sub unsqltime {
1930: my $timestamp=shift;
1931: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1932: $timestamp=&maketime(
1933: 'year'=>$1,'month'=>$2,'day'=>$3,
1934: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1935: }
1936: return $timestamp;
1937: }
1938:
1939: #########################################
1940:
1941: sub findallcourses {
1942: my %courses=();
1943: my $now=time;
1944: foreach (keys %ENV) {
1945: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1946: my ($starttime,$endtime)=$ENV{$_};
1947: my $active=1;
1948: if ($starttime) {
1949: if ($now<$starttime) { $active=0; }
1950: }
1951: if ($endtime) {
1952: if ($now>$endtime) { $active=0; }
1953: }
1954: if ($active) { $courses{$1.'_'.$2}=1; }
1955: }
1956: }
1957: return keys %courses;
1958: }
1959:
1960: ###############################################
1961: ###############################################
1962:
1963: =pod
1964:
1965: =head1 Domain Template Functions
1966:
1967: =over 4
1968:
1969: =item * &determinedomain()
1970:
1971: Inputs: $domain (usually will be undef)
1972:
1973: Returns: Determines which domain should be used for designs
1974:
1975: =cut
1976:
1977: ###############################################
1978: sub determinedomain {
1979: my $domain=shift;
1980: if (! $domain) {
1981: # Determine domain if we have not been given one
1982: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1983: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1984: if ($ENV{'request.role.domain'}) {
1985: $domain=$ENV{'request.role.domain'};
1986: }
1987: }
1988: return $domain;
1989: }
1990: ###############################################
1991: =pod
1992:
1993: =item * &domainlogo()
1994:
1995: Inputs: $domain (usually will be undef)
1996:
1997: Returns: A link to a domain logo, if the domain logo exists.
1998: If the domain logo does not exist, a description of the domain.
1999:
2000: =cut
2001:
2002: ###############################################
2003: sub domainlogo {
2004: my $domain = &determinedomain(shift);
2005: # See if there is a logo
2006: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
2007: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2008: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2009: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
2010: '/adm/lonDomLogos/'.$domain.'.gif" alt="'.$domain.'" />';
2011: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
2012: return $Apache::lonnet::domaindescription{$domain};
2013: } else {
2014: return '';
2015: }
2016: }
2017: ##############################################
2018:
2019: =pod
2020:
2021: =item * &designparm()
2022:
2023: Inputs: $which parameter; $domain (usually will be undef)
2024:
2025: Returns: value of designparamter $which
2026:
2027: =cut
2028:
2029: ##############################################
2030: sub designparm {
2031: my ($which,$domain)=@_;
2032: if ($ENV{'browser.blackwhite'} eq 'on') {
2033: if ($which=~/\.(font|alink|vlink|link)$/) {
2034: return '#000000';
2035: }
2036: if ($which=~/\.(pgbg|sidebg)$/) {
2037: return '#FFFFFF';
2038: }
2039: if ($which=~/\.tabbg$/) {
2040: return '#CCCCCC';
2041: }
2042: }
2043: if ($ENV{'environment.color.'.$which}) {
2044: return $ENV{'environment.color.'.$which};
2045: }
2046: $domain=&determinedomain($domain);
2047: if ($designhash{$domain.'.'.$which}) {
2048: return $designhash{$domain.'.'.$which};
2049: } else {
2050: return $designhash{'default.'.$which};
2051: }
2052: }
2053:
2054: ###############################################
2055: ###############################################
2056:
2057: =pod
2058:
2059: =back
2060:
2061: =head1 HTTP Helpers
2062:
2063: =over 4
2064:
2065: =item * &bodytag()
2066:
2067: Returns a uniform header for LON-CAPA web pages.
2068:
2069: Inputs:
2070:
2071: =over 4
2072:
2073: =item * $title, A title to be displayed on the page.
2074:
2075: =item * $function, the current role (can be undef).
2076:
2077: =item * $addentries, extra parameters for the <body> tag.
2078:
2079: =item * $bodyonly, if defined, only return the <body> tag.
2080:
2081: =item * $domain, if defined, force a given domain.
2082:
2083: =item * $forcereg, if page should register as content page (relevant for
2084: text interface only)
2085:
2086: =back
2087:
2088: Returns: A uniform header for LON-CAPA web pages.
2089: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2090: If $bodyonly is undef or zero, an html string containing a <body> tag and
2091: other decorations will be returned.
2092:
2093: =cut
2094:
2095: sub bodytag {
2096: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2097: $title=&mt($title);
2098: unless ($function) {
2099: $function='student';
2100: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2101: $function='coordinator';
2102: }
2103: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2104: $function='admin';
2105: }
2106: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2107: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2108: $function='author';
2109: }
2110: }
2111: my $img=&designparm($function.'.img',$domain);
2112: my $pgbg=&designparm($function.'.pgbg',$domain);
2113: my $tabbg=&designparm($function.'.tabbg',$domain);
2114: my $font=&designparm($function.'.font',$domain);
2115: my $link=&designparm($function.'.link',$domain);
2116: my $alink=&designparm($function.'.alink',$domain);
2117: my $vlink=&designparm($function.'.vlink',$domain);
2118: my $sidebg=&designparm($function.'.sidebg',$domain);
2119: # Accessibility font enhance
2120: unless ($addentries) { $addentries=''; }
2121: my $addstyle='';
2122: if ($ENV{'browser.fontenhance'} eq 'on') {
2123: $addstyle=' font-size: x-large;';
2124: }
2125: # role and realm
2126: my ($role,$realm)
2127: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2128: # realm
2129: if ($ENV{'request.course.id'}) {
2130: $realm=
2131: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2132: }
2133: unless ($realm) { $realm=' '; }
2134: # Set messages
2135: my $messages=&domainlogo($domain);
2136: # Port for miniserver
2137: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2138: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2139: # construct main body tag
2140: my $bodytag = <<END;
2141: <style>
2142: h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
2143: a:hover { color: black; background: yellow }
2144: a:focus { color: red; background: yellow }
2145: </style>
2146: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2147: style="margin-top: 0px;$addstyle" $addentries>
2148: END
2149: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2150: $lonhttpdPort.$img.'" alt="'.$function.'" />';
2151: if ($bodyonly) {
2152: return $bodytag;
2153: } elsif ($ENV{'browser.interface'} eq 'textual') {
2154: # Accessibility
2155: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2156: $forcereg).
2157: '<h1>LON-CAPA: '.$title.'</h1>';
2158: } elsif ($ENV{'environment.remote'} eq 'off') {
2159: # No Remote
2160: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2161: $forcereg).
2162: '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font face="Arial, Helvetica, sans-serif" size="+3" color="'.$font.'"><b>'.$title.
2163: '</b></font></td></tr></table>';
2164: }
2165:
2166: #
2167: # Top frame rendering, Remote is up
2168: #
2169: return(<<ENDBODY);
2170: $bodytag
2171: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2172: <tr><td bgcolor="$sidebg">
2173: $upperleft</td>
2174: <td bgcolor="$sidebg" align="right">$messages </td>
2175: </tr>
2176: <tr>
2177: <td rowspan="3" bgcolor="$tabbg">
2178: <font size="5" face="Arial, Helvetica, sans-serif"><b>$title</b></font>
2179: <td bgcolor="$tabbg" align="right">
2180: <font size="2" face="Arial, Helvetica, sans-serif">
2181: $ENV{'environment.firstname'}
2182: $ENV{'environment.middlename'}
2183: $ENV{'environment.lastname'}
2184: $ENV{'environment.generation'}
2185: </font>
2186: </td>
2187: </tr>
2188: <tr><td bgcolor="$tabbg" align="right">
2189: <font size="2" face="Arial, Helvetica, sans-serif">$role</font>
2190: </td></tr>
2191: <tr>
2192: <td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font> </td></tr>
2193: </table><br>
2194: ENDBODY
2195: }
2196:
2197: ###############################################
2198:
2199: sub get_posted_cgi {
2200: my $r=shift;
2201:
2202: my $buffer;
2203:
2204: $r->read($buffer,$r->header_in('Content-length'),0);
2205: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2206: my @pairs=split(/&/,$buffer);
2207: my $pair;
2208: foreach $pair (@pairs) {
2209: my ($name,$value) = split(/=/,$pair);
2210: $value =~ tr/+/ /;
2211: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2212: $name =~ tr/+/ /;
2213: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2214: &add_to_env("form.$name",$value);
2215: }
2216: } else {
2217: my $contentsep=$1;
2218: my @lines = split (/\n/,$buffer);
2219: my $name='';
2220: my $value='';
2221: my $fname='';
2222: my $fmime='';
2223: my $i;
2224: for ($i=0;$i<=$#lines;$i++) {
2225: if ($lines[$i]=~/^$contentsep/) {
2226: if ($name) {
2227: chomp($value);
2228: if ($fname) {
2229: $ENV{"form.$name.filename"}=$fname;
2230: $ENV{"form.$name.mimetype"}=$fmime;
2231: } else {
2232: $value=~s/\s+$//s;
2233: }
2234: &add_to_env("form.$name",$value);
2235: }
2236: if ($i<$#lines) {
2237: $i++;
2238: $lines[$i]=~
2239: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2240: $name=$1;
2241: $value='';
2242: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2243: $fname=$1;
2244: if
2245: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2246: $fmime=$1;
2247: $i++;
2248: } else {
2249: $fmime='';
2250: }
2251: } else {
2252: $fname='';
2253: $fmime='';
2254: }
2255: $i++;
2256: }
2257: } else {
2258: $value.=$lines[$i]."\n";
2259: }
2260: }
2261: }
2262: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2263: $r->method_number(M_GET);
2264: $r->method('GET');
2265: $r->headers_in->unset('Content-length');
2266: }
2267:
2268: =pod
2269:
2270: =item * get_unprocessed_cgi($query,$possible_names)
2271:
2272: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2273: $query. The parameters listed in $possible_names (an array reference),
2274: will be set in $ENV{'form.name'} if they do not already exist.
2275:
2276: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2277: $possible_names is an ref to an array of form element names. As an example:
2278: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2279: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2280:
2281: =cut
2282:
2283: sub get_unprocessed_cgi {
2284: my ($query,$possible_names)= @_;
2285: # $Apache::lonxml::debug=1;
2286: foreach (split(/&/,$query)) {
2287: my ($name, $value) = split(/=/,$_);
2288: $name = &Apache::lonnet::unescape($name);
2289: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2290: $value =~ tr/+/ /;
2291: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2292: &Apache::lonxml::debug("Seting :$name: to :$value:");
2293: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2294: }
2295: }
2296: }
2297:
2298: =pod
2299:
2300: =item * cacheheader()
2301:
2302: returns cache-controlling header code
2303:
2304: =cut
2305:
2306: sub cacheheader {
2307: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2308: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2309: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2310: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2311: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2312: return $output;
2313: }
2314:
2315: =pod
2316:
2317: =item * no_cache($r)
2318:
2319: specifies header code to not have cache
2320:
2321: =cut
2322:
2323: sub no_cache {
2324: my ($r) = @_;
2325: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2326: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2327: $r->no_cache(1);
2328: $r->header_out("Pragma" => "no-cache");
2329: #$r->header_out("Expires" => $date);
2330: }
2331:
2332: sub content_type {
2333: my ($r,$type,$charset) = @_;
2334: unless ($charset) {
2335: $charset=&Apache::lonlocal::current_encoding;
2336: }
2337: $r->content_type($type.($charset?'; charset='.$charset:''));
2338: }
2339:
2340: =pod
2341:
2342: =item * add_to_env($name,$value)
2343:
2344: adds $name to the %ENV hash with value
2345: $value, if $name already exists, the entry is converted to an array
2346: reference and $value is added to the array.
2347:
2348: =cut
2349:
2350: sub add_to_env {
2351: my ($name,$value)=@_;
2352: if (defined($ENV{$name})) {
2353: if (ref($ENV{$name})) {
2354: #already have multiple values
2355: push(@{ $ENV{$name} },$value);
2356: } else {
2357: #first time seeing multiple values, convert hash entry to an arrayref
2358: my $first=$ENV{$name};
2359: undef($ENV{$name});
2360: push(@{ $ENV{$name} },$first,$value);
2361: }
2362: } else {
2363: $ENV{$name}=$value;
2364: }
2365: }
2366:
2367: =pod
2368:
2369: =item * get_env_multiple($name)
2370:
2371: gets $name from the %ENV hash, it seemlessly handles the cases where multiple
2372: values may be defined and end up as an array ref.
2373:
2374: returns an array of values
2375:
2376: =cut
2377:
2378: sub get_env_multiple {
2379: my ($name) = @_;
2380: my @values;
2381: if (defined($ENV{$name})) {
2382: # exists is it an array
2383: if (ref($ENV{$name})) {
2384: @values=@{ $ENV{$name} };
2385: } else {
2386: $values[0]=$ENV{$name};
2387: }
2388: }
2389: return(@values);
2390: }
2391:
2392:
2393: =pod
2394:
2395: =back
2396:
2397: =head1 CSV Upload/Handling functions
2398:
2399: =over 4
2400:
2401: =item * upfile_store($r)
2402:
2403: Store uploaded file, $r should be the HTTP Request object,
2404: needs $ENV{'form.upfile'}
2405: returns $datatoken to be put into hidden field
2406:
2407: =cut
2408:
2409: sub upfile_store {
2410: my $r=shift;
2411: $ENV{'form.upfile'}=~s/\r/\n/gs;
2412: $ENV{'form.upfile'}=~s/\f/\n/gs;
2413: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2414: $ENV{'form.upfile'}=~s/\n+$//gs;
2415:
2416: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2417: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2418: {
2419: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
2420: '/tmp/'.$datatoken.'.tmp');
2421: print $fh $ENV{'form.upfile'};
2422: }
2423: return $datatoken;
2424: }
2425:
2426: =pod
2427:
2428: =item * load_tmp_file($r)
2429:
2430: Load uploaded file from tmp, $r should be the HTTP Request object,
2431: needs $ENV{'form.datatoken'},
2432: sets $ENV{'form.upfile'} to the contents of the file
2433:
2434: =cut
2435:
2436: sub load_tmp_file {
2437: my $r=shift;
2438: my @studentdata=();
2439: {
2440: my $fh;
2441: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
2442: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
2443: @studentdata=<$fh>;
2444: }
2445: }
2446: $ENV{'form.upfile'}=join('',@studentdata);
2447: }
2448:
2449: =pod
2450:
2451: =item * upfile_record_sep()
2452:
2453: Separate uploaded file into records
2454: returns array of records,
2455: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2456:
2457: =cut
2458:
2459: sub upfile_record_sep {
2460: if ($ENV{'form.upfiletype'} eq 'xml') {
2461: } else {
2462: return split(/\n/,$ENV{'form.upfile'});
2463: }
2464: }
2465:
2466: =pod
2467:
2468: =item * record_sep($record)
2469:
2470: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2471:
2472: =cut
2473:
2474: sub record_sep {
2475: my $record=shift;
2476: my %components=();
2477: if ($ENV{'form.upfiletype'} eq 'xml') {
2478: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2479: my $i=0;
2480: foreach (split(/\s+/,$record)) {
2481: my $field=$_;
2482: $field=~s/^(\"|\')//;
2483: $field=~s/(\"|\')$//;
2484: $components{$i}=$field;
2485: $i++;
2486: }
2487: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2488: my $i=0;
2489: foreach (split(/\t+/,$record)) {
2490: my $field=$_;
2491: $field=~s/^(\"|\')//;
2492: $field=~s/(\"|\')$//;
2493: $components{$i}=$field;
2494: $i++;
2495: }
2496: } else {
2497: my @allfields=split(/\,/,$record);
2498: my $i=0;
2499: my $j;
2500: for ($j=0;$j<=$#allfields;$j++) {
2501: my $field=$allfields[$j];
2502: if ($field=~/^\s*(\"|\')/) {
2503: my $delimiter=$1;
2504: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2505: $j++;
2506: $field.=','.$allfields[$j];
2507: }
2508: $field=~s/^\s*$delimiter//;
2509: $field=~s/$delimiter\s*$//;
2510: }
2511: $components{$i}=$field;
2512: $i++;
2513: }
2514: }
2515: return %components;
2516: }
2517:
2518: ######################################################
2519: ######################################################
2520:
2521: =pod
2522:
2523: =item * upfile_select_html()
2524:
2525: Return HTML code to select a file from the users machine and specify
2526: the file type.
2527:
2528: =cut
2529:
2530: ######################################################
2531: ######################################################
2532: sub upfile_select_html {
2533: my %Types = (
2534: csv => &mt('CSV (comma separated values, spreadsheet)'),
2535: space => &mt('Space separated'),
2536: tab => &mt('Tabulator separated'),
2537: # xml => &mt('HTML/XML'),
2538: );
2539: my $Str = '<input type="file" name="upfile" size="50" />'.
2540: '<br />Type: <select name="upfiletype">';
2541: foreach my $type (sort(keys(%Types))) {
2542: $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
2543: }
2544: $Str .= "</select>\n";
2545: return $Str;
2546: }
2547:
2548: ######################################################
2549: ######################################################
2550:
2551: =pod
2552:
2553: =item * csv_print_samples($r,$records)
2554:
2555: Prints a table of sample values from each column uploaded $r is an
2556: Apache Request ref, $records is an arrayref from
2557: &Apache::loncommon::upfile_record_sep
2558:
2559: =cut
2560:
2561: ######################################################
2562: ######################################################
2563: sub csv_print_samples {
2564: my ($r,$records) = @_;
2565: my (%sone,%stwo,%sthree);
2566: %sone=&record_sep($$records[0]);
2567: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2568: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2569: #
2570: $r->print(&mt('Samples').'<br /><table border="2"><tr>');
2571: foreach (sort({$a <=> $b} keys(%sone))) {
2572: $r->print('<th>'.&mt('Column [_1]',($_+1)).'</th>'); }
2573: $r->print('</tr>');
2574: foreach my $hash (\%sone,\%stwo,\%sthree) {
2575: $r->print('<tr>');
2576: foreach (sort({$a <=> $b} keys(%sone))) {
2577: $r->print('<td>');
2578: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2579: $r->print('</td>');
2580: }
2581: $r->print('</tr>');
2582: }
2583: $r->print('</tr></table><br />'."\n");
2584: }
2585:
2586: ######################################################
2587: ######################################################
2588:
2589: =pod
2590:
2591: =item * csv_print_select_table($r,$records,$d)
2592:
2593: Prints a table to create associations between values and table columns.
2594:
2595: $r is an Apache Request ref,
2596: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2597: $d is an array of 2 element arrays (internal name, displayed name)
2598:
2599: =cut
2600:
2601: ######################################################
2602: ######################################################
2603: sub csv_print_select_table {
2604: my ($r,$records,$d) = @_;
2605: my $i=0;my %sone;
2606: %sone=&record_sep($$records[0]);
2607: $r->print(&mt('Associate columns with student attributes.')."\n".
2608: '<table border="2"><tr>'.
2609: '<th>'.&mt('Attribute').'</th>'.
2610: '<th>'.&mt('Column').'</th></tr>'."\n");
2611: foreach (@$d) {
2612: my ($value,$display)=@{ $_ };
2613: $r->print('<tr><td>'.$display.'</td>');
2614:
2615: $r->print('<td><select name=f'.$i.
2616: ' onchange="javascript:flip(this.form,'.$i.');">');
2617: $r->print('<option value="none"></option>');
2618: foreach (sort({$a <=> $b} keys(%sone))) {
2619: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2620: }
2621: $r->print('</select></td></tr>'."\n");
2622: $i++;
2623: }
2624: $i--;
2625: return $i;
2626: }
2627:
2628: ######################################################
2629: ######################################################
2630:
2631: =pod
2632:
2633: =item * csv_samples_select_table($r,$records,$d)
2634:
2635: Prints a table of sample values from the upload and can make associate samples to internal names.
2636:
2637: $r is an Apache Request ref,
2638: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2639: $d is an array of 2 element arrays (internal name, displayed name)
2640:
2641: =cut
2642:
2643: ######################################################
2644: ######################################################
2645: sub csv_samples_select_table {
2646: my ($r,$records,$d) = @_;
2647: my %sone; my %stwo; my %sthree;
2648: my $i=0;
2649: #
2650: $r->print('<table border=2><tr><th>'.
2651: &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
2652: %sone=&record_sep($$records[0]);
2653: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2654: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2655: #
2656: foreach (sort keys %sone) {
2657: $r->print('<tr><td><select name="f'.$i.'"'.
2658: ' onchange="javascript:flip(this.form,'.$i.');">');
2659: foreach (@$d) {
2660: my ($value,$display)=@{ $_ };
2661: $r->print('<option value="'.$value.'">'.$display.'</option>');
2662: }
2663: $r->print('</select></td><td>');
2664: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2665: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2666: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2667: $r->print('</td></tr>');
2668: $i++;
2669: }
2670: $i--;
2671: return($i);
2672: }
2673:
2674: ######################################################
2675: ######################################################
2676:
2677: =pod
2678:
2679: =item clean_excel_name($name)
2680:
2681: Returns a replacement for $name which does not contain any illegal characters.
2682:
2683: =cut
2684:
2685: ######################################################
2686: ######################################################
2687: sub clean_excel_name {
2688: my ($name) = @_;
2689: $name =~ s/[:\*\?\/\\]//g;
2690: if (length($name) > 31) {
2691: $name = substr($name,0,31);
2692: }
2693: return $name;
2694: }
2695:
2696: =pod
2697:
2698: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2699:
2700: Returns either 1 or undef
2701:
2702: 1 if the part is to be hidden, undef if it is to be shown
2703:
2704: Arguments are:
2705:
2706: $id the id of the part to be checked
2707: $symb, optional the symb of the resource to check
2708: $udom, optional the domain of the user to check for
2709: $uname, optional the username of the user to check for
2710:
2711: =cut
2712:
2713: sub check_if_partid_hidden {
2714: my ($id,$symb,$udom,$uname) = @_;
2715: my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
2716: $symb,$udom,$uname);
2717: my $truth=1;
2718: #if the string starts with !, then the list is the list to show not hide
2719: if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
2720: my @hiddenlist=split(/,/,$hiddenparts);
2721: foreach my $checkid (@hiddenlist) {
2722: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
2723: }
2724: return !$truth;
2725: }
2726:
2727:
2728: ############################################################
2729: ############################################################
2730:
2731: =pod
2732:
2733: =head1 cgi-bin script and graphing routines
2734:
2735: =item get_cgi_id
2736:
2737: Inputs: none
2738:
2739: Returns an id which can be used to pass environment variables
2740: to various cgi-bin scripts. These environment variables will
2741: be removed from the users environment after a given time by
2742: the routine &Apache::lonnet::transfer_profile_to_env.
2743:
2744: =cut
2745:
2746: ############################################################
2747: ############################################################
2748:
2749: sub get_cgi_id {
2750: return (time.'_'.int(rand(1000)));
2751: }
2752:
2753: ############################################################
2754: ############################################################
2755:
2756: =pod
2757:
2758: =item DrawBarGraph
2759:
2760: Facilitates the plotting of data in a (stacked) bar graph.
2761: Puts plot definition data into the users environment in order for
2762: graph.png to plot it. Returns an <img> tag for the plot.
2763: The bars on the plot are labeled '1','2',...,'n'.
2764:
2765: Inputs:
2766:
2767: =over 4
2768:
2769: =item $Title: string, the title of the plot
2770:
2771: =item $xlabel: string, text describing the X-axis of the plot
2772:
2773: =item $ylabel: string, text describing the Y-axis of the plot
2774:
2775: =item $Max: scalar, the maximum Y value to use in the plot
2776: If $Max is < any data point, the graph will not be rendered.
2777:
2778: =item $colors: array ref holding the colors to be used for the data sets when
2779: they are plotted. If undefined, default values will be used.
2780:
2781: =item @Values: An array of array references. Each array reference holds data
2782: to be plotted in a stacked bar chart.
2783:
2784: =back
2785:
2786: Returns:
2787:
2788: An <img> tag which references graph.png and the appropriate identifying
2789: information for the plot.
2790:
2791: =cut
2792:
2793: ############################################################
2794: ############################################################
2795: sub DrawBarGraph {
2796: my ($Title,$xlabel,$ylabel,$Max,$colors,@Values)=@_;
2797: #
2798: if (! defined($colors)) {
2799: $colors = ['#33ff00',
2800: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
2801: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
2802: ];
2803: }
2804: #
2805: my $identifier = &get_cgi_id();
2806: my $id = 'cgi.'.$identifier;
2807: if (! @Values || ref($Values[0]) ne 'ARRAY') {
2808: return '';
2809: }
2810: my $NumBars = scalar(@{$Values[0]});
2811: my %ValuesHash;
2812: my $NumSets=1;
2813: foreach my $array (@Values) {
2814: next if (! ref($array));
2815: $ValuesHash{$id.'.data.'.$NumSets++} =
2816: join(',',@$array);
2817: }
2818: #
2819: my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
2820: if ($NumBars < 10) {
2821: $width = 120+$NumBars*15;
2822: $xskip = 1;
2823: $bar_width = 15;
2824: } elsif ($NumBars <= 25) {
2825: $width = 120+$NumBars*11;
2826: $xskip = 5;
2827: $bar_width = 8;
2828: } elsif ($NumBars <= 50) {
2829: $width = 120+$NumBars*8;
2830: $xskip = 5;
2831: $bar_width = 4;
2832: } else {
2833: $width = 120+$NumBars*8;
2834: $xskip = 5;
2835: $bar_width = 4;
2836: }
2837: #
2838: my @Labels;
2839: for (my $i=0;$i<@{$Values[0]};$i++) {
2840: push (@Labels,$i+1);
2841: }
2842: #
2843: $Max = 1 if ($Max < 1);
2844: if ( int($Max) < $Max ) {
2845: $Max++;
2846: $Max = int($Max);
2847: }
2848: $Title = '' if (! defined($Title));
2849: $xlabel = '' if (! defined($xlabel));
2850: $ylabel = '' if (! defined($ylabel));
2851: $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
2852: $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
2853: $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
2854: $ValuesHash{$id.'.y_max_value'} = $Max;
2855: $ValuesHash{$id.'.NumBars'} = $NumBars;
2856: $ValuesHash{$id.'.NumSets'} = $NumSets;
2857: $ValuesHash{$id.'.PlotType'} = 'bar';
2858: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2859: $ValuesHash{$id.'.height'} = $height;
2860: $ValuesHash{$id.'.width'} = $width;
2861: $ValuesHash{$id.'.xskip'} = $xskip;
2862: $ValuesHash{$id.'.bar_width'} = $bar_width;
2863: $ValuesHash{$id.'.labels'} = join(',',@Labels);
2864: #
2865: &Apache::lonnet::appenv(%ValuesHash);
2866: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2867: }
2868:
2869: ############################################################
2870: ############################################################
2871:
2872: =pod
2873:
2874: =item DrawXYGraph
2875:
2876: Facilitates the plotting of data in an XY graph.
2877: Puts plot definition data into the users environment in order for
2878: graph.png to plot it. Returns an <img> tag for the plot.
2879:
2880: Inputs:
2881:
2882: =over 4
2883:
2884: =item $Title: string, the title of the plot
2885:
2886: =item $xlabel: string, text describing the X-axis of the plot
2887:
2888: =item $ylabel: string, text describing the Y-axis of the plot
2889:
2890: =item $Max: scalar, the maximum Y value to use in the plot
2891: If $Max is < any data point, the graph will not be rendered.
2892:
2893: =item $colors: Array ref containing the hex color codes for the data to be
2894: plotted in. If undefined, default values will be used.
2895:
2896: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2897:
2898: =item $Ydata: Array ref containing Array refs.
2899: Each of the contained arrays will be plotted as a seperate curve.
2900:
2901: =item %Values: hash indicating or overriding any default values which are
2902: passed to graph.png.
2903: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2904:
2905: =back
2906:
2907: Returns:
2908:
2909: An <img> tag which references graph.png and the appropriate identifying
2910: information for the plot.
2911:
2912: =cut
2913:
2914: ############################################################
2915: ############################################################
2916: sub DrawXYGraph {
2917: my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
2918: #
2919: # Create the identifier for the graph
2920: my $identifier = &get_cgi_id();
2921: my $id = 'cgi.'.$identifier;
2922: #
2923: $Title = '' if (! defined($Title));
2924: $xlabel = '' if (! defined($xlabel));
2925: $ylabel = '' if (! defined($ylabel));
2926: my %ValuesHash =
2927: (
2928: $id.'.title' => &Apache::lonnet::escape($Title),
2929: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
2930: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
2931: $id.'.y_max_value'=> $Max,
2932: $id.'.labels' => join(',',@$Xlabels),
2933: $id.'.PlotType' => 'XY',
2934: );
2935: #
2936: if (defined($colors) && ref($colors) eq 'ARRAY') {
2937: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2938: }
2939: #
2940: if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
2941: return '';
2942: }
2943: my $NumSets=1;
2944: foreach my $array (@{$Ydata}){
2945: next if (! ref($array));
2946: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
2947: }
2948: $ValuesHash{$id.'.NumSets'} = $NumSets-1;
2949: #
2950: # Deal with other parameters
2951: while (my ($key,$value) = each(%Values)) {
2952: $ValuesHash{$id.'.'.$key} = $value;
2953: }
2954: #
2955: &Apache::lonnet::appenv(%ValuesHash);
2956: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2957: }
2958:
2959: ############################################################
2960: ############################################################
2961:
2962: =pod
2963:
2964: =item DrawXYYGraph
2965:
2966: Facilitates the plotting of data in an XY graph with two Y axes.
2967: Puts plot definition data into the users environment in order for
2968: graph.png to plot it. Returns an <img> tag for the plot.
2969:
2970: Inputs:
2971:
2972: =over 4
2973:
2974: =item $Title: string, the title of the plot
2975:
2976: =item $xlabel: string, text describing the X-axis of the plot
2977:
2978: =item $ylabel: string, text describing the Y-axis of the plot
2979:
2980: =item $colors: Array ref containing the hex color codes for the data to be
2981: plotted in. If undefined, default values will be used.
2982:
2983: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2984:
2985: =item $Ydata1: The first data set
2986:
2987: =item $Min1: The minimum value of the left Y-axis
2988:
2989: =item $Max1: The maximum value of the left Y-axis
2990:
2991: =item $Ydata2: The second data set
2992:
2993: =item $Min2: The minimum value of the right Y-axis
2994:
2995: =item $Max2: The maximum value of the left Y-axis
2996:
2997: =item %Values: hash indicating or overriding any default values which are
2998: passed to graph.png.
2999: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
3000:
3001: =back
3002:
3003: Returns:
3004:
3005: An <img> tag which references graph.png and the appropriate identifying
3006: information for the plot.
3007:
3008: =cut
3009:
3010: ############################################################
3011: ############################################################
3012: sub DrawXYYGraph {
3013: my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
3014: $Ydata2,$Min2,$Max2,%Values)=@_;
3015: #
3016: # Create the identifier for the graph
3017: my $identifier = &get_cgi_id();
3018: my $id = 'cgi.'.$identifier;
3019: #
3020: $Title = '' if (! defined($Title));
3021: $xlabel = '' if (! defined($xlabel));
3022: $ylabel = '' if (! defined($ylabel));
3023: my %ValuesHash =
3024: (
3025: $id.'.title' => &Apache::lonnet::escape($Title),
3026: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
3027: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
3028: $id.'.labels' => join(',',@$Xlabels),
3029: $id.'.PlotType' => 'XY',
3030: $id.'.NumSets' => 2,
3031: $id.'.two_axes' => 1,
3032: $id.'.y1_max_value' => $Max1,
3033: $id.'.y1_min_value' => $Min1,
3034: $id.'.y2_max_value' => $Max2,
3035: $id.'.y2_min_value' => $Min2,
3036: );
3037: #
3038: if (defined($colors) && ref($colors) eq 'ARRAY') {
3039: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3040: }
3041: #
3042: if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
3043: ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
3044: return '';
3045: }
3046: my $NumSets=1;
3047: foreach my $array ($Ydata1,$Ydata2){
3048: next if (! ref($array));
3049: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3050: }
3051: #
3052: # Deal with other parameters
3053: while (my ($key,$value) = each(%Values)) {
3054: $ValuesHash{$id.'.'.$key} = $value;
3055: }
3056: #
3057: &Apache::lonnet::appenv(%ValuesHash);
3058: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3059: }
3060:
3061: ############################################################
3062: ############################################################
3063:
3064: =pod
3065:
3066: =head1 Statistics helper routines?
3067:
3068: Bad place for them but what the hell.
3069:
3070: =item &chartlink
3071:
3072: Returns a link to the chart for a specific student.
3073:
3074: Inputs:
3075:
3076: =over 4
3077:
3078: =item $linktext: The text of the link
3079:
3080: =item $sname: The students username
3081:
3082: =item $sdomain: The students domain
3083:
3084: =back
3085:
3086: =cut
3087:
3088: ############################################################
3089: ############################################################
3090: sub chartlink {
3091: my ($linktext, $sname, $sdomain) = @_;
3092: my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
3093: '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
3094: '&chartoutputmode='.HTML::Entities::encode('html, with all links').
3095: '">'.$linktext.'</a>';
3096: }
3097:
3098: ############################################################
3099: ############################################################
3100:
3101: =pod
3102:
3103: =back
3104:
3105: =cut
3106:
3107: 1;
3108: __END__;
3109:
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