1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.157 2003/12/01 14:36:22 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: # Makes a table out of the previous attempts
30: # Inputs result_from_symbread, user, domain, course_id
31: # Reads in non-network-related .tab files
32:
33: # POD header:
34:
35: =pod
36:
37: =head1 NAME
38:
39: Apache::loncommon - pile of common routines
40:
41: =head1 SYNOPSIS
42:
43: Common routines for manipulating connections, student answers,
44: domains, common Javascript fragments, etc.
45:
46: =head1 OVERVIEW
47:
48: A collection of commonly used subroutines that don't have a natural
49: home anywhere else. This collection helps remove
50: redundancy from other modules and increase efficiency of memory usage.
51:
52: =cut
53:
54: # End of POD header
55: package Apache::loncommon;
56:
57: use strict;
58: use Apache::lonnet();
59: use GDBM_File;
60: use POSIX qw(strftime mktime);
61: use Apache::Constants qw(:common :http :methods);
62: use Apache::lonmsg();
63: use Apache::lonmenu();
64: use Apache::lonlocal;
65: use HTML::Entities;
66:
67: my $readit;
68:
69: ##
70: ## Global Variables
71: ##
72:
73: # ----------------------------------------------- Filetypes/Languages/Copyright
74: my %language;
75: my %supported_language;
76: my %cprtag;
77: my %fe; my %fd;
78: my %category_extensions;
79:
80: # ---------------------------------------------- Designs
81:
82: my %designhash;
83:
84: # ---------------------------------------------- Thesaurus variables
85: #
86: # %Keywords:
87: # A hash used by &keyword to determine if a word is considered a keyword.
88: # $thesaurus_db_file
89: # Scalar containing the full path to the thesaurus database.
90:
91: my %Keywords;
92: my $thesaurus_db_file;
93:
94: #
95: # Initialize values from language.tab, copyright.tab, filetypes.tab,
96: # thesaurus.tab, and filecategories.tab.
97: #
98: BEGIN {
99: # Variable initialization
100: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
101: #
102: unless ($readit) {
103: # ------------------------------------------------------------------- languages
104: {
105: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
106: '/language.tab');
107: if ($fh) {
108: while (<$fh>) {
109: next if /^\#/;
110: chomp;
111: my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
112: $language{$key}=$val.' - '.$enc;
113: if ($sup) {
114: $supported_language{$key}=$sup;
115: }
116: }
117: }
118: }
119: # ------------------------------------------------------------------ copyrights
120: {
121: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
122: '/copyright.tab');
123: if ($fh) {
124: while (<$fh>) {
125: next if /^\#/;
126: chomp;
127: my ($key,$val)=(split(/\s+/,$_,2));
128: $cprtag{$key}=$val;
129: }
130: }
131: }
132:
133: # -------------------------------------------------------------- domain designs
134:
135: my $filename;
136: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
137: opendir(DIR,$designdir);
138: while ($filename=readdir(DIR)) {
139: my ($domain)=($filename=~/^(\w+)\./);
140: {
141: my $fh=Apache::File->new($designdir.'/'.$filename);
142: if ($fh) {
143: while (<$fh>) {
144: next if /^\#/;
145: chomp;
146: my ($key,$val)=(split(/\=/,$_));
147: if ($val) { $designhash{$domain.'.'.$key}=$val; }
148: }
149: }
150: }
151:
152: }
153: closedir(DIR);
154:
155:
156: # ------------------------------------------------------------- file categories
157: {
158: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
159: '/filecategories.tab');
160: if ($fh) {
161: while (<$fh>) {
162: next if /^\#/;
163: chomp;
164: my ($extension,$category)=(split(/\s+/,$_,2));
165: push @{$category_extensions{lc($category)}},$extension;
166: }
167: }
168: }
169: # ------------------------------------------------------------------ file types
170: {
171: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
172: '/filetypes.tab');
173: if ($fh) {
174: while (<$fh>) {
175: next if (/^\#/);
176: chomp;
177: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
178: if ($descr ne '') {
179: $fe{$ending}=lc($emb);
180: $fd{$ending}=$descr;
181: }
182: }
183: }
184: }
185: &Apache::lonnet::logthis(
186: "<font color=yellow>INFO: Read file types</font>");
187: $readit=1;
188: } # end of unless($readit)
189:
190: }
191:
192: ###############################################################
193: ## HTML and Javascript Helper Functions ##
194: ###############################################################
195:
196: =pod
197:
198: =head1 HTML and Javascript Functions
199:
200: =over 4
201:
202: =item * browser_and_searcher_javascript ()
203:
204: X<browsing, javascript>X<searching, javascript>Returns a string
205: containing javascript with two functions, C<openbrowser> and
206: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
207: tags.
208:
209: =item * openbrowser(formname,elementname,only,omit) [javascript]
210:
211: inputs: formname, elementname, only, omit
212:
213: formname and elementname indicate the name of the html form and name of
214: the element that the results of the browsing selection are to be placed in.
215:
216: Specifying 'only' will restrict the browser to displaying only files
217: with the given extension. Can be a comma seperated list.
218:
219: Specifying 'omit' will restrict the browser to NOT displaying files
220: with the given extension. Can be a comma seperated list.
221:
222: =item * opensearcher(formname, elementname) [javascript]
223:
224: Inputs: formname, elementname
225:
226: formname and elementname specify the name of the html form and the name
227: of the element the selection from the search results will be placed in.
228:
229: =cut
230:
231: sub browser_and_searcher_javascript {
232: return <<END;
233: var editbrowser = null;
234: function openbrowser(formname,elementname,only,omit,titleelement) {
235: var url = '/res/?';
236: if (editbrowser == null) {
237: url += 'launch=1&';
238: }
239: url += 'catalogmode=interactive&';
240: url += 'mode=edit&';
241: url += 'form=' + formname + '&';
242: if (only != null) {
243: url += 'only=' + only + '&';
244: }
245: if (omit != null) {
246: url += 'omit=' + omit + '&';
247: }
248: if (titleelement != null) {
249: url += 'titleelement=' + titleelement + '&';
250: }
251: url += 'element=' + elementname + '';
252: var title = 'Browser';
253: var options = 'scrollbars=1,resizable=1,menubar=0';
254: options += ',width=700,height=600';
255: editbrowser = open(url,title,options,'1');
256: editbrowser.focus();
257: }
258: var editsearcher;
259: function opensearcher(formname,elementname,titleelement) {
260: var url = '/adm/searchcat?';
261: if (editsearcher == null) {
262: url += 'launch=1&';
263: }
264: url += 'catalogmode=interactive&';
265: url += 'mode=edit&';
266: url += 'form=' + formname + '&';
267: if (titleelement != null) {
268: url += 'titleelement=' + titleelement + '&';
269: }
270: url += 'element=' + elementname + '';
271: var title = 'Search';
272: var options = 'scrollbars=1,resizable=1,menubar=0';
273: options += ',width=700,height=600';
274: editsearcher = open(url,title,options,'1');
275: editsearcher.focus();
276: }
277: END
278: }
279:
280: sub studentbrowser_javascript {
281: unless (
282: (($ENV{'request.course.id'}) &&
283: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
284: || ($ENV{'request.role'}=~/^(au|dc|su)/)
285: ) { return ''; }
286: return (<<'ENDSTDBRW');
287: <script type="text/javascript" language="Javascript" >
288: var stdeditbrowser;
289: function openstdbrowser(formname,uname,udom,roleflag) {
290: var url = '/adm/pickstudent?';
291: var filter;
292: eval('filter=document.'+formname+'.'+uname+'.value;');
293: if (filter != null) {
294: if (filter != '') {
295: url += 'filter='+filter+'&';
296: }
297: }
298: url += 'form=' + formname + '&unameelement='+uname+
299: '&udomelement='+udom;
300: if (roleflag) { url+="&roles=1"; }
301: var title = 'Student_Browser';
302: var options = 'scrollbars=1,resizable=1,menubar=0';
303: options += ',width=700,height=600';
304: stdeditbrowser = open(url,title,options,'1');
305: stdeditbrowser.focus();
306: }
307: </script>
308: ENDSTDBRW
309: }
310:
311: sub selectstudent_link {
312: my ($form,$unameele,$udomele)=@_;
313: if ($ENV{'request.course.id'}) {
314: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
315: return '';
316: }
317: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
318: '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
319: }
320: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
321: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
322: '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
323: }
324: return '';
325: }
326:
327: sub coursebrowser_javascript {
328: my ($domainfilter)=@_;
329: return (<<ENDSTDBRW);
330: <script type="text/javascript" language="Javascript" >
331: var stdeditbrowser;
332: function opencrsbrowser(formname,uname,udom) {
333: var url = '/adm/pickcourse?';
334: var filter;
335: if (filter != null) {
336: if (filter != '') {
337: url += 'filter='+filter+'&';
338: }
339: }
340: var domainfilter='$domainfilter';
341: if (domainfilter != null) {
342: if (domainfilter != '') {
343: url += 'domainfilter='+domainfilter+'&';
344: }
345: }
346: url += 'form=' + formname + '&cnumelement='+uname+
347: '&cdomelement='+udom;
348: var title = 'Course_Browser';
349: var options = 'scrollbars=1,resizable=1,menubar=0';
350: options += ',width=700,height=600';
351: stdeditbrowser = open(url,title,options,'1');
352: stdeditbrowser.focus();
353: }
354: </script>
355: ENDSTDBRW
356: }
357:
358: sub selectcourse_link {
359: my ($form,$unameele,$udomele)=@_;
360: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
361: '","'.$udomele.'");'."'>".&mt('Select Course')."</a>";
362: }
363:
364: =pod
365:
366: =item * linked_select_forms(...)
367:
368: linked_select_forms returns a string containing a <script></script> block
369: and html for two <select> menus. The select menus will be linked in that
370: changing the value of the first menu will result in new values being placed
371: in the second menu. The values in the select menu will appear in alphabetical
372: order.
373:
374: linked_select_forms takes the following ordered inputs:
375:
376: =over 4
377:
378: =item * $formname, the name of the <form> tag
379:
380: =item * $middletext, the text which appears between the <select> tags
381:
382: =item * $firstdefault, the default value for the first menu
383:
384: =item * $firstselectname, the name of the first <select> tag
385:
386: =item * $secondselectname, the name of the second <select> tag
387:
388: =item * $hashref, a reference to a hash containing the data for the menus.
389:
390: =back
391:
392: Below is an example of such a hash. Only the 'text', 'default', and
393: 'select2' keys must appear as stated. keys(%menu) are the possible
394: values for the first select menu. The text that coincides with the
395: first menu value is given in $menu{$choice1}->{'text'}. The values
396: and text for the second menu are given in the hash pointed to by
397: $menu{$choice1}->{'select2'}.
398:
399: my %menu = ( A1 => { text =>"Choice A1" ,
400: default => "B3",
401: select2 => {
402: B1 => "Choice B1",
403: B2 => "Choice B2",
404: B3 => "Choice B3",
405: B4 => "Choice B4"
406: }
407: },
408: A2 => { text =>"Choice A2" ,
409: default => "C2",
410: select2 => {
411: C1 => "Choice C1",
412: C2 => "Choice C2",
413: C3 => "Choice C3"
414: }
415: },
416: A3 => { text =>"Choice A3" ,
417: default => "D6",
418: select2 => {
419: D1 => "Choice D1",
420: D2 => "Choice D2",
421: D3 => "Choice D3",
422: D4 => "Choice D4",
423: D5 => "Choice D5",
424: D6 => "Choice D6",
425: D7 => "Choice D7"
426: }
427: }
428: );
429:
430: =cut
431:
432: sub linked_select_forms {
433: my ($formname,
434: $middletext,
435: $firstdefault,
436: $firstselectname,
437: $secondselectname,
438: $hashref
439: ) = @_;
440: my $second = "document.$formname.$secondselectname";
441: my $first = "document.$formname.$firstselectname";
442: # output the javascript to do the changing
443: my $result = '';
444: $result.="<script>\n";
445: $result.="var select2data = new Object();\n";
446: $" = '","';
447: my $debug = '';
448: foreach my $s1 (sort(keys(%$hashref))) {
449: $result.="select2data.d_$s1 = new Object();\n";
450: $result.="select2data.d_$s1.def = new String('".
451: $hashref->{$s1}->{'default'}."');\n";
452: $result.="select2data.d_$s1.values = new Array(";
453: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
454: $result.="\"@s2values\");\n";
455: $result.="select2data.d_$s1.texts = new Array(";
456: my @s2texts;
457: foreach my $value (@s2values) {
458: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
459: }
460: $result.="\"@s2texts\");\n";
461: }
462: $"=' ';
463: $result.= <<"END";
464:
465: function select1_changed() {
466: // Determine new choice
467: var newvalue = "d_" + $first.value;
468: // update select2
469: var values = select2data[newvalue].values;
470: var texts = select2data[newvalue].texts;
471: var select2def = select2data[newvalue].def;
472: var i;
473: // out with the old
474: for (i = 0; i < $second.options.length; i++) {
475: $second.options[i] = null;
476: }
477: // in with the nuclear
478: for (i=0;i<values.length; i++) {
479: $second.options[i] = new Option(values[i]);
480: $second.options[i].value = values[i];
481: $second.options[i].text = texts[i];
482: if (values[i] == select2def) {
483: $second.options[i].selected = true;
484: }
485: }
486: }
487: </script>
488: END
489: # output the initial values for the selection lists
490: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
491: foreach my $value (sort(keys(%$hashref))) {
492: $result.=" <option value=\"$value\" ";
493: $result.=" selected=\"true\" " if ($value eq $firstdefault);
494: $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
495: }
496: $result .= "</select>\n";
497: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
498: $result .= $middletext;
499: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
500: my $seconddefault = $hashref->{$firstdefault}->{'default'};
501: foreach my $value (sort(keys(%select2))) {
502: $result.=" <option value=\"$value\" ";
503: $result.=" selected=\"true\" " if ($value eq $seconddefault);
504: $result.=">".&mt($select2{$value})."</option>\n";
505: }
506: $result .= "</select>\n";
507: # return $debug;
508: return $result;
509: } # end of sub linked_select_forms {
510:
511: =pod
512:
513: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
514:
515: Returns a string corresponding to an HTML link to the given help
516: $topic, where $topic corresponds to the name of a .tex file in
517: /home/httpd/html/adm/help/tex, with underscores replaced by
518: spaces.
519:
520: $text will optionally be linked to the same topic, allowing you to
521: link text in addition to the graphic. If you do not want to link
522: text, but wish to specify one of the later parameters, pass an
523: empty string.
524:
525: $stayOnPage is a value that will be interpreted as a boolean. If true,
526: the link will not open a new window. If false, the link will open
527: a new window using Javascript. (Default is false.)
528:
529: $width and $height are optional numerical parameters that will
530: override the width and height of the popped up window, which may
531: be useful for certain help topics with big pictures included.
532:
533: =cut
534:
535: sub help_open_topic {
536: my ($topic, $text, $stayOnPage, $width, $height) = @_;
537: $text = "" if (not defined $text);
538: $stayOnPage = 0 if (not defined $stayOnPage);
539: if ($ENV{'browser.interface'} eq 'textual' ||
540: $ENV{'environment.remote'} eq 'off' ) {
541: $stayOnPage=1;
542: }
543: $width = 350 if (not defined $width);
544: $height = 400 if (not defined $height);
545: my $filename = $topic;
546: $filename =~ s/ /_/g;
547:
548: my $template = "";
549: my $link;
550:
551: if (!$stayOnPage)
552: {
553: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
554: }
555: else
556: {
557: $link = "/adm/help/${filename}.hlp";
558: }
559:
560: # Add the text
561: if ($text ne "")
562: {
563: $template .=
564: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
565: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
566: }
567:
568: # Add the graphic
569: $template .= <<"ENDTEMPLATE";
570: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
571: ENDTEMPLATE
572: if ($text ne '') { $template.='</td></tr></table>' };
573: return $template;
574:
575: }
576:
577: # This is a quicky function for Latex cheatsheet editing, since it
578: # appears in at least four places
579: sub helpLatexCheatsheet {
580: my $other = shift;
581: my $addOther = '';
582: if ($other) {
583: $addOther = Apache::loncommon::help_open_topic($other, shift,
584: undef, undef, 600) .
585: '</td><td>';
586: }
587: return '<table><tr><td>'.
588: $addOther .
589: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
590: undef,undef,600)
591: .'</td><td>'.
592: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
593: undef,undef,600)
594: .'</td></tr></table>';
595: }
596:
597: =pod
598:
599: =item * csv_translate($text)
600:
601: Translate $text to allow it to be output as a 'comma seperated values'
602: format.
603:
604: =cut
605:
606: sub csv_translate {
607: my $text = shift;
608: $text =~ s/\"/\"\"/g;
609: $text =~ s/\n//g;
610: return $text;
611: }
612:
613: =pod
614:
615: =item * change_content_javascript():
616:
617: This and the next function allow you to create small sections of an
618: otherwise static HTML page that you can update on the fly with
619: Javascript, even in Netscape 4.
620:
621: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
622: must be written to the HTML page once. It will prove the Javascript
623: function "change(name, content)". Calling the change function with the
624: name of the section
625: you want to update, matching the name passed to C<changable_area>, and
626: the new content you want to put in there, will put the content into
627: that area.
628:
629: B<Note>: Netscape 4 only reserves enough space for the changable area
630: to contain room for the original contents. You need to "make space"
631: for whatever changes you wish to make, and be B<sure> to check your
632: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
633: it's adequate for updating a one-line status display, but little more.
634: This script will set the space to 100% width, so you only need to
635: worry about height in Netscape 4.
636:
637: Modern browsers are much less limiting, and if you can commit to the
638: user not using Netscape 4, this feature may be used freely with
639: pretty much any HTML.
640:
641: =cut
642:
643: sub change_content_javascript {
644: # If we're on Netscape 4, we need to use Layer-based code
645: if ($ENV{'browser.type'} eq 'netscape' &&
646: $ENV{'browser.version'} =~ /^4\./) {
647: return (<<NETSCAPE4);
648: function change(name, content) {
649: doc = document.layers[name+"___escape"].layers[0].document;
650: doc.open();
651: doc.write(content);
652: doc.close();
653: }
654: NETSCAPE4
655: } else {
656: # Otherwise, we need to use semi-standards-compliant code
657: # (technically, "innerHTML" isn't standard but the equivalent
658: # is really scary, and every useful browser supports it
659: return (<<DOMBASED);
660: function change(name, content) {
661: element = document.getElementById(name);
662: element.innerHTML = content;
663: }
664: DOMBASED
665: }
666: }
667:
668: =pod
669:
670: =item * changable_area($name, $origContent):
671:
672: This provides a "changable area" that can be modified on the fly via
673: the Javascript code provided in C<change_content_javascript>. $name is
674: the name you will use to reference the area later; do not repeat the
675: same name on a given HTML page more then once. $origContent is what
676: the area will originally contain, which can be left blank.
677:
678: =cut
679:
680: sub changable_area {
681: my ($name, $origContent) = @_;
682:
683: if ($ENV{'browser.type'} eq 'netscape' &&
684: $ENV{'browser.version'} =~ /^4\./) {
685: # If this is netscape 4, we need to use the Layer tag
686: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
687: } else {
688: return "<span id='$name'>$origContent</span>";
689: }
690: }
691:
692: =pod
693:
694: =back
695:
696: =cut
697:
698: ###############################################################
699: ## Home server <option> list generating code ##
700: ###############################################################
701:
702: =pod
703:
704: =head1 Home Server option list generating code
705:
706: =over 4
707:
708: =item * get_domains()
709:
710: Returns an array containing each of the domains listed in the hosts.tab
711: file.
712:
713: =cut
714:
715: #-------------------------------------------
716: sub get_domains {
717: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
718: my @domains;
719: my %seen;
720: foreach (sort values(%Apache::lonnet::hostdom)) {
721: push (@domains,$_) unless $seen{$_}++;
722: }
723: return @domains;
724: }
725:
726: #-------------------------------------------
727:
728: =pod
729:
730: =item * select_form($defdom,$name,%hash)
731:
732: Returns a string containing a <select name='$name' size='1'> form to
733: allow a user to select options from a hash option_name => displayed text.
734: See lonrights.pm for an example invocation and use.
735:
736: =cut
737:
738: #-------------------------------------------
739: sub select_form {
740: my ($def,$name,%hash) = @_;
741: my $selectform = "<select name=\"$name\" size=\"1\">\n";
742: my @keys;
743: if (exists($hash{'select_form_order'})) {
744: @keys=@{$hash{'select_form_order'}};
745: } else {
746: @keys=sort(keys(%hash));
747: }
748: foreach (@keys) {
749: $selectform.="<option value=\"$_\" ".
750: ($_ eq $def ? 'selected' : '').
751: ">".&mt($hash{$_})."</option>\n";
752: }
753: $selectform.="</select>";
754: return $selectform;
755: }
756:
757:
758: #-------------------------------------------
759:
760: =pod
761:
762: =item * select_dom_form($defdom,$name,$includeempty)
763:
764: Returns a string containing a <select name='$name' size='1'> form to
765: allow a user to select the domain to preform an operation in.
766: See loncreateuser.pm for an example invocation and use.
767:
768: If the $includeempty flag is set, it also includes an empty choice ("no domain
769: selected");
770:
771: =cut
772:
773: #-------------------------------------------
774: sub select_dom_form {
775: my ($defdom,$name,$includeempty) = @_;
776: my @domains = get_domains();
777: if ($includeempty) { @domains=('',@domains); }
778: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
779: foreach (@domains) {
780: $selectdomain.="<option value=\"$_\" ".
781: ($_ eq $defdom ? 'selected' : '').
782: ">$_</option>\n";
783: }
784: $selectdomain.="</select>";
785: return $selectdomain;
786: }
787:
788: #-------------------------------------------
789:
790: =pod
791:
792: =item * get_library_servers($domain)
793:
794: Returns a hash which contains keys like '103l3' and values like
795: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
796: given $domain.
797:
798: =cut
799:
800: #-------------------------------------------
801: sub get_library_servers {
802: my $domain = shift;
803: my %library_servers;
804: foreach (keys(%Apache::lonnet::libserv)) {
805: if ($Apache::lonnet::hostdom{$_} eq $domain) {
806: $library_servers{$_} = $Apache::lonnet::hostname{$_};
807: }
808: }
809: return %library_servers;
810: }
811:
812: #-------------------------------------------
813:
814: =pod
815:
816: =item * home_server_option_list($domain)
817:
818: returns a string which contains an <option> list to be used in a
819: <select> form input. See loncreateuser.pm for an example.
820:
821: =cut
822:
823: #-------------------------------------------
824: sub home_server_option_list {
825: my $domain = shift;
826: my %servers = &get_library_servers($domain);
827: my $result = '';
828: foreach (sort keys(%servers)) {
829: $result.=
830: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
831: }
832: return $result;
833: }
834:
835: =pod
836:
837: =back
838:
839: =cut
840:
841: ###############################################################
842: ## Decoding User Agent ##
843: ###############################################################
844:
845: =pod
846:
847: =head1 Decoding the User Agent
848:
849: =over 4
850:
851: =item * &decode_user_agent()
852:
853: Inputs: $r
854:
855: Outputs:
856:
857: =over 4
858:
859: =item * $httpbrowser
860:
861: =item * $clientbrowser
862:
863: =item * $clientversion
864:
865: =item * $clientmathml
866:
867: =item * $clientunicode
868:
869: =item * $clientos
870:
871: =back
872:
873: =back
874:
875: =cut
876:
877: ###############################################################
878: ###############################################################
879: sub decode_user_agent {
880: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
881: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
882: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
883: my $clientbrowser='unknown';
884: my $clientversion='0';
885: my $clientmathml='';
886: my $clientunicode='0';
887: for (my $i=0;$i<=$#browsertype;$i++) {
888: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
889: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
890: $clientbrowser=$bname;
891: $httpbrowser=~/$vreg/i;
892: $clientversion=$1;
893: $clientmathml=($clientversion>=$minv);
894: $clientunicode=($clientversion>=$univ);
895: }
896: }
897: my $clientos='unknown';
898: if (($httpbrowser=~/linux/i) ||
899: ($httpbrowser=~/unix/i) ||
900: ($httpbrowser=~/ux/i) ||
901: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
902: if (($httpbrowser=~/vax/i) ||
903: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
904: if ($httpbrowser=~/next/i) { $clientos='next'; }
905: if (($httpbrowser=~/mac/i) ||
906: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
907: if ($httpbrowser=~/win/i) { $clientos='win'; }
908: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
909: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
910: $clientunicode,$clientos,);
911: }
912:
913: ###############################################################
914: ## Authentication changing form generation subroutines ##
915: ###############################################################
916: ##
917: ## All of the authform_xxxxxxx subroutines take their inputs in a
918: ## hash, and have reasonable default values.
919: ##
920: ## formname = the name given in the <form> tag.
921: #-------------------------------------------
922:
923: =pod
924:
925: =head1 Authentication Routines
926:
927: =over 4
928:
929: =item * authform_xxxxxx
930:
931: The authform_xxxxxx subroutines provide javascript and html forms which
932: handle some of the conveniences required for authentication forms.
933: This is not an optimal method, but it works.
934:
935: See loncreateuser.pm for invocation and use examples.
936:
937: =over 4
938:
939: =item * authform_header
940:
941: =item * authform_authorwarning
942:
943: =item * authform_nochange
944:
945: =item * authform_kerberos
946:
947: =item * authform_internal
948:
949: =item * authform_filesystem
950:
951: =back
952:
953: =back
954:
955: =cut
956:
957: #-------------------------------------------
958: sub authform_header{
959: my %in = (
960: formname => 'cu',
961: kerb_def_dom => '',
962: @_,
963: );
964: $in{'formname'} = 'document.' . $in{'formname'};
965: my $result='';
966:
967: #---------------------------------------------- Code for upper case translation
968: my $Javascript_toUpperCase;
969: unless ($in{kerb_def_dom}) {
970: $Javascript_toUpperCase =<<"END";
971: switch (choice) {
972: case 'krb': currentform.elements[choicearg].value =
973: currentform.elements[choicearg].value.toUpperCase();
974: break;
975: default:
976: }
977: END
978: } else {
979: $Javascript_toUpperCase = "";
980: }
981:
982: $result.=<<"END";
983: var current = new Object();
984: current.radiovalue = 'nochange';
985: current.argfield = null;
986:
987: function changed_radio(choice,currentform) {
988: var choicearg = choice + 'arg';
989: // If a radio button in changed, we need to change the argfield
990: if (current.radiovalue != choice) {
991: current.radiovalue = choice;
992: if (current.argfield != null) {
993: currentform.elements[current.argfield].value = '';
994: }
995: if (choice == 'nochange') {
996: current.argfield = null;
997: } else {
998: current.argfield = choicearg;
999: switch(choice) {
1000: case 'krb':
1001: currentform.elements[current.argfield].value =
1002: "$in{'kerb_def_dom'}";
1003: break;
1004: default:
1005: break;
1006: }
1007: }
1008: }
1009: return;
1010: }
1011:
1012: function changed_text(choice,currentform) {
1013: var choicearg = choice + 'arg';
1014: if (currentform.elements[choicearg].value !='') {
1015: $Javascript_toUpperCase
1016: // clear old field
1017: if ((current.argfield != choicearg) && (current.argfield != null)) {
1018: currentform.elements[current.argfield].value = '';
1019: }
1020: current.argfield = choicearg;
1021: }
1022: set_auth_radio_buttons(choice,currentform);
1023: return;
1024: }
1025:
1026: function set_auth_radio_buttons(newvalue,currentform) {
1027: var i=0;
1028: while (i < currentform.login.length) {
1029: if (currentform.login[i].value == newvalue) { break; }
1030: i++;
1031: }
1032: if (i == currentform.login.length) {
1033: return;
1034: }
1035: current.radiovalue = newvalue;
1036: currentform.login[i].checked = true;
1037: return;
1038: }
1039: END
1040: return $result;
1041: }
1042:
1043: sub authform_authorwarning{
1044: my $result='';
1045: $result='<i>'.
1046: &mt('As a general rule, only authors or co-authors should be '.
1047: 'filesystem authenticated '.
1048: '(which allows access to the server filesystem).')."</i>\n";
1049: return $result;
1050: }
1051:
1052: sub authform_nochange{
1053: my %in = (
1054: formname => 'document.cu',
1055: kerb_def_dom => 'MSU.EDU',
1056: @_,
1057: );
1058: my $result = &mt('[_1] Do not change login data',
1059: '<input type="radio" name="login" value="nochange" '.
1060: 'checked="checked" onclick="'.
1061: "javascript:changed_radio('nochange',$in{'formname'});".'" />');
1062: return $result;
1063: }
1064:
1065: sub authform_kerberos{
1066: my %in = (
1067: formname => 'document.cu',
1068: kerb_def_dom => 'MSU.EDU',
1069: kerb_def_auth => 'krb4',
1070: @_,
1071: );
1072: my ($check4,$check5);
1073: if ($in{'kerb_def_auth'} eq 'krb5') {
1074: $check5 = " checked=\"on\"";
1075: } else {
1076: $check4 = " checked=\"on\"";
1077: }
1078: my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
1079: my $result .= &mt
1080: ('[_1] Kerberos authenticated with domain [_2] '.
1081: '[_3] Version 4 [_4] Version 5',
1082: '<input type="radio" name="login" value="krb" '.
1083: 'onclick="'.$jscall.'" onchange="'.$jscall.'" />',
1084: '<input type="text" size="10" name="krbarg" '.
1085: 'value="'.$in{'kerb_def_dom'}.'" '.
1086: 'onchange="'.$jscall.'" />',
1087: '<input type="radio" name="krbver" value="4" '.$check4.' />',
1088: '<input type="radio" name="krbver" value="5" '.$check5.' />');
1089: return $result;
1090: }
1091:
1092: sub authform_internal{
1093: my %args = (
1094: formname => 'document.cu',
1095: kerb_def_dom => 'MSU.EDU',
1096: @_,
1097: );
1098: my $jscall = "javascript:changed_radio('int',$args{'formname'});";
1099: my $result.=&mt
1100: ('[_1] Internally authenticated (with initial password [_2])',
1101: '<input type="radio" name="login" value="int" '.
1102: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1103: '<input type="text" size="10" name="intarg" value="" '.
1104: 'onchange="'.$jscall.'" />');
1105: return $result;
1106: }
1107:
1108: sub authform_local{
1109: my %in = (
1110: formname => 'document.cu',
1111: kerb_def_dom => 'MSU.EDU',
1112: @_,
1113: );
1114: my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
1115: my $result.=&mt('[_1] Local Authentication with arguement [_2]',
1116: '<input type="radio" name="login" value="loc" '.
1117: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1118: '<input type="text" size="10" name="locarg" value="" '.
1119: 'onchange="'.$jscall.'" />');
1120: return $result;
1121: }
1122:
1123: sub authform_filesystem{
1124: my %in = (
1125: formname => 'document.cu',
1126: kerb_def_dom => 'MSU.EDU',
1127: @_,
1128: );
1129: my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
1130: my $result.= &mt
1131: ('[_1] Filesystem Authenticated (with initial password [_2])',
1132: '<input type="radio" name="login" value="fsys" '.
1133: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1134: '<input type="text" size="10" name="fsysarg" value="" '.
1135: 'onchange="'.$jscall.'" />');
1136: return $result;
1137: }
1138:
1139: ###############################################################
1140: ## Get Authentication Defaults for Domain ##
1141: ###############################################################
1142:
1143: =pod
1144:
1145: =head1 Domains and Authentication
1146:
1147: Returns default authentication type and an associated argument as
1148: listed in file 'domain.tab'.
1149:
1150: =over 4
1151:
1152: =item * get_auth_defaults
1153:
1154: get_auth_defaults($target_domain) returns the default authentication
1155: type and an associated argument (initial password or a kerberos domain).
1156: These values are stored in lonTabs/domain.tab
1157:
1158: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1159:
1160: If target_domain is not found in domain.tab, returns nothing ('').
1161:
1162: =cut
1163:
1164: #-------------------------------------------
1165: sub get_auth_defaults {
1166: my $domain=shift;
1167: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1168: }
1169: ###############################################################
1170: ## End Get Authentication Defaults for Domain ##
1171: ###############################################################
1172:
1173: ###############################################################
1174: ## Get Kerberos Defaults for Domain ##
1175: ###############################################################
1176: ##
1177: ## Returns default kerberos version and an associated argument
1178: ## as listed in file domain.tab. If not listed, provides
1179: ## appropriate default domain and kerberos version.
1180: ##
1181: #-------------------------------------------
1182:
1183: =pod
1184:
1185: =item * get_kerberos_defaults
1186:
1187: get_kerberos_defaults($target_domain) returns the default kerberos
1188: version and domain. If not found in domain.tabs, it defaults to
1189: version 4 and the domain of the server.
1190:
1191: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1192:
1193: =cut
1194:
1195: #-------------------------------------------
1196: sub get_kerberos_defaults {
1197: my $domain=shift;
1198: my ($krbdef,$krbdefdom) =
1199: &Apache::loncommon::get_auth_defaults($domain);
1200: unless ($krbdef =~/^krb/ && $krbdefdom) {
1201: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1202: my $krbdefdom=$1;
1203: $krbdefdom=~tr/a-z/A-Z/;
1204: $krbdef = "krb4";
1205: }
1206: return ($krbdef,$krbdefdom);
1207: }
1208:
1209: =pod
1210:
1211: =back
1212:
1213: =cut
1214:
1215: ###############################################################
1216: ## Thesaurus Functions ##
1217: ###############################################################
1218:
1219: =pod
1220:
1221: =head1 Thesaurus Functions
1222:
1223: =over 4
1224:
1225: =item * initialize_keywords
1226:
1227: Initializes the package variable %Keywords if it is empty. Uses the
1228: package variable $thesaurus_db_file.
1229:
1230: =cut
1231:
1232: ###################################################
1233:
1234: sub initialize_keywords {
1235: return 1 if (scalar keys(%Keywords));
1236: # If we are here, %Keywords is empty, so fill it up
1237: # Make sure the file we need exists...
1238: if (! -e $thesaurus_db_file) {
1239: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1240: " failed because it does not exist");
1241: return 0;
1242: }
1243: # Set up the hash as a database
1244: my %thesaurus_db;
1245: if (! tie(%thesaurus_db,'GDBM_File',
1246: $thesaurus_db_file,&GDBM_READER(),0640)){
1247: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1248: $thesaurus_db_file);
1249: return 0;
1250: }
1251: # Get the average number of appearances of a word.
1252: my $avecount = $thesaurus_db{'average.count'};
1253: # Put keywords (those that appear > average) into %Keywords
1254: while (my ($word,$data)=each (%thesaurus_db)) {
1255: my ($count,undef) = split /:/,$data;
1256: $Keywords{$word}++ if ($count > $avecount);
1257: }
1258: untie %thesaurus_db;
1259: # Remove special values from %Keywords.
1260: foreach ('total.count','average.count') {
1261: delete($Keywords{$_}) if (exists($Keywords{$_}));
1262: }
1263: return 1;
1264: }
1265:
1266: ###################################################
1267:
1268: =pod
1269:
1270: =item * keyword($word)
1271:
1272: Returns true if $word is a keyword. A keyword is a word that appears more
1273: than the average number of times in the thesaurus database. Calls
1274: &initialize_keywords
1275:
1276: =cut
1277:
1278: ###################################################
1279:
1280: sub keyword {
1281: return if (!&initialize_keywords());
1282: my $word=lc(shift());
1283: $word=~s/\W//g;
1284: return exists($Keywords{$word});
1285: }
1286:
1287: ###############################################################
1288:
1289: =pod
1290:
1291: =item * get_related_words
1292:
1293: Look up a word in the thesaurus. Takes a scalar arguement and returns
1294: an array of words. If the keyword is not in the thesaurus, an empty array
1295: will be returned. The order of the words returned is determined by the
1296: database which holds them.
1297:
1298: Uses global $thesaurus_db_file.
1299:
1300: =cut
1301:
1302: ###############################################################
1303: sub get_related_words {
1304: my $keyword = shift;
1305: my %thesaurus_db;
1306: if (! -e $thesaurus_db_file) {
1307: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1308: "failed because the file does not exist");
1309: return ();
1310: }
1311: if (! tie(%thesaurus_db,'GDBM_File',
1312: $thesaurus_db_file,&GDBM_READER(),0640)){
1313: return ();
1314: }
1315: my @Words=();
1316: if (exists($thesaurus_db{$keyword})) {
1317: $_ = $thesaurus_db{$keyword};
1318: (undef,@Words) = split/:/; # The first element is the number of times
1319: # the word appears. We do not need it now.
1320: for (my $i=0;$i<=$#Words;$i++) {
1321: ($Words[$i],undef)= split/\,/,$Words[$i];
1322: }
1323: }
1324: untie %thesaurus_db;
1325: return @Words;
1326: }
1327:
1328: =pod
1329:
1330: =back
1331:
1332: =cut
1333:
1334: # -------------------------------------------------------------- Plaintext name
1335: =pod
1336:
1337: =head1 User Name Functions
1338:
1339: =over 4
1340:
1341: =item * plainname($uname,$udom)
1342:
1343: Takes a users logon name and returns it as a string in
1344: "first middle last generation" form
1345:
1346: =cut
1347:
1348: ###############################################################
1349: sub plainname {
1350: my ($uname,$udom)=@_;
1351: my %names=&Apache::lonnet::get('environment',
1352: ['firstname','middlename','lastname','generation'],
1353: $udom,$uname);
1354: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1355: $names{'lastname'}.' '.$names{'generation'};
1356: $name=~s/\s+$//;
1357: $name=~s/\s+/ /g;
1358: return $name;
1359: }
1360:
1361: # -------------------------------------------------------------------- Nickname
1362: =pod
1363:
1364: =item * nickname($uname,$udom)
1365:
1366: Gets a users name and returns it as a string as
1367:
1368: ""nickname""
1369:
1370: if the user has a nickname or
1371:
1372: "first middle last generation"
1373:
1374: if the user does not
1375:
1376: =cut
1377:
1378: sub nickname {
1379: my ($uname,$udom)=@_;
1380: my %names=&Apache::lonnet::get('environment',
1381: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1382: my $name=$names{'nickname'};
1383: if ($name) {
1384: $name='"'.$name.'"';
1385: } else {
1386: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1387: $names{'lastname'}.' '.$names{'generation'};
1388: $name=~s/\s+$//;
1389: $name=~s/\s+/ /g;
1390: }
1391: return $name;
1392: }
1393:
1394:
1395: # ------------------------------------------------------------------ Screenname
1396:
1397: =pod
1398:
1399: =item * screenname($uname,$udom)
1400:
1401: Gets a users screenname and returns it as a string
1402:
1403: =cut
1404:
1405: sub screenname {
1406: my ($uname,$udom)=@_;
1407: my %names=
1408: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1409: return $names{'screenname'};
1410: }
1411:
1412: # ------------------------------------------------------------- Message Wrapper
1413:
1414: sub messagewrapper {
1415: my ($link,$un,$do)=@_;
1416: return
1417: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1418: }
1419: # --------------------------------------------------------------- Notes Wrapper
1420:
1421: sub noteswrapper {
1422: my ($link,$un,$do)=@_;
1423: return
1424: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1425: }
1426: # ------------------------------------------------------------- Aboutme Wrapper
1427:
1428: sub aboutmewrapper {
1429: my ($link,$username,$domain)=@_;
1430: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1431: }
1432:
1433: # ------------------------------------------------------------ Syllabus Wrapper
1434:
1435:
1436: sub syllabuswrapper {
1437: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1438: if ($fontcolor) {
1439: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1440: }
1441: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1442: }
1443:
1444: =pod
1445:
1446: =back
1447:
1448: =head1 Access .tab File Data
1449:
1450: =over 4
1451:
1452: =item * languageids()
1453:
1454: returns list of all language ids
1455:
1456: =cut
1457:
1458: sub languageids {
1459: return sort(keys(%language));
1460: }
1461:
1462: =pod
1463:
1464: =item * languagedescription()
1465:
1466: returns description of a specified language id
1467:
1468: =cut
1469:
1470: sub languagedescription {
1471: my $code=shift;
1472: return ($supported_language{$code}?'* ':'').
1473: $language{$code}.
1474: ($supported_language{$code}?' ('.&mt('interface available').')':'');
1475: }
1476:
1477: sub plainlanguagedescription {
1478: my $code=shift;
1479: return $language{$code};
1480: }
1481:
1482: sub supportedlanguagecode {
1483: my $code=shift;
1484: return $supported_language{$code};
1485: }
1486:
1487: =pod
1488:
1489: =item * copyrightids()
1490:
1491: returns list of all copyrights
1492:
1493: =cut
1494:
1495: sub copyrightids {
1496: return sort(keys(%cprtag));
1497: }
1498:
1499: =pod
1500:
1501: =item * copyrightdescription()
1502:
1503: returns description of a specified copyright id
1504:
1505: =cut
1506:
1507: sub copyrightdescription {
1508: return $cprtag{shift(@_)};
1509: }
1510:
1511: =pod
1512:
1513: =item * filecategories()
1514:
1515: returns list of all file categories
1516:
1517: =cut
1518:
1519: sub filecategories {
1520: return sort(keys(%category_extensions));
1521: }
1522:
1523: =pod
1524:
1525: =item * filecategorytypes()
1526:
1527: returns list of file types belonging to a given file
1528: category
1529:
1530: =cut
1531:
1532: sub filecategorytypes {
1533: return @{$category_extensions{lc($_[0])}};
1534: }
1535:
1536: =pod
1537:
1538: =item * fileembstyle()
1539:
1540: returns embedding style for a specified file type
1541:
1542: =cut
1543:
1544: sub fileembstyle {
1545: return $fe{lc(shift(@_))};
1546: }
1547:
1548: =pod
1549:
1550: =item * filedescription()
1551:
1552: returns description for a specified file type
1553:
1554: =cut
1555:
1556: sub filedescription {
1557: return $fd{lc(shift(@_))};
1558: }
1559:
1560: =pod
1561:
1562: =item * filedescriptionex()
1563:
1564: returns description for a specified file type with
1565: extra formatting
1566:
1567: =cut
1568:
1569: sub filedescriptionex {
1570: my $ex=shift;
1571: return '.'.$ex.' '.$fd{lc($ex)};
1572: }
1573:
1574: # End of .tab access
1575: =pod
1576:
1577: =back
1578:
1579: =cut
1580:
1581: # ------------------------------------------------------------------ File Types
1582: sub fileextensions {
1583: return sort(keys(%fe));
1584: }
1585:
1586: # ----------------------------------------------------------- Display Languages
1587: # returns a hash with all desired display languages
1588: #
1589:
1590: sub display_languages {
1591: my %languages=();
1592: foreach (&preferred_languages()) {
1593: $languages{$_}=1;
1594: }
1595: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1596: if ($ENV{'form.displaylanguage'}) {
1597: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1598: $languages{$_}=1;
1599: }
1600: }
1601: return %languages;
1602: }
1603:
1604: sub preferred_languages {
1605: my @languages=();
1606: if ($ENV{'environment.languages'}) {
1607: @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
1608: }
1609: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1610: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
1611: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
1612: }
1613: my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
1614: if ($browser) {
1615: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
1616: }
1617: if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
1618: @languages=(@languages,
1619: $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
1620: }
1621: if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
1622: @languages=(@languages,
1623: $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
1624: }
1625: if ($Apache::lonnet::domain_lang_def{
1626: $Apache::lonnet::perlvar{'lonDefDomain'}}) {
1627: @languages=(@languages,
1628: $Apache::lonnet::domain_lang_def{
1629: $Apache::lonnet::perlvar{'lonDefDomain'}});
1630: }
1631: # turn "en-ca" into "en-ca,en"
1632: my @genlanguages;
1633: foreach (@languages) {
1634: unless ($_=~/\w/) { next; }
1635: push (@genlanguages,$_);
1636: if ($_=~/(\-|\_)/) {
1637: push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
1638: }
1639: }
1640: return @genlanguages;
1641: }
1642:
1643: ###############################################################
1644: ## Student Answer Attempts ##
1645: ###############################################################
1646:
1647: =pod
1648:
1649: =head1 Alternate Problem Views
1650:
1651: =over 4
1652:
1653: =item * get_previous_attempt($symb, $username, $domain, $course,
1654: $getattempt, $regexp, $gradesub)
1655:
1656: Return string with previous attempt on problem. Arguments:
1657:
1658: =over 4
1659:
1660: =item * $symb: Problem, including path
1661:
1662: =item * $username: username of the desired student
1663:
1664: =item * $domain: domain of the desired student
1665:
1666: =item * $course: Course ID
1667:
1668: =item * $getattempt: Leave blank for all attempts, otherwise put
1669: something
1670:
1671: =item * $regexp: if string matches this regexp, the string will be
1672: sent to $gradesub
1673:
1674: =item * $gradesub: routine that processes the string if it matches $regexp
1675:
1676: =back
1677:
1678: The output string is a table containing all desired attempts, if any.
1679:
1680: =cut
1681:
1682: sub get_previous_attempt {
1683: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1684: my $prevattempts='';
1685: no strict 'refs';
1686: if ($symb) {
1687: my (%returnhash)=
1688: &Apache::lonnet::restore($symb,$course,$domain,$username);
1689: if ($returnhash{'version'}) {
1690: my %lasthash=();
1691: my $version;
1692: for ($version=1;$version<=$returnhash{'version'};$version++) {
1693: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1694: $lasthash{$_}=$returnhash{$version.':'.$_};
1695: }
1696: }
1697: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1698: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1699: foreach (sort(keys %lasthash)) {
1700: my ($ign,@parts) = split(/\./,$_);
1701: if ($#parts > 0) {
1702: my $data=$parts[-1];
1703: pop(@parts);
1704: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1705: } else {
1706: if ($#parts == 0) {
1707: $prevattempts.='<th>'.$parts[0].'</th>';
1708: } else {
1709: $prevattempts.='<th>'.$ign.'</th>';
1710: }
1711: }
1712: }
1713: if ($getattempt eq '') {
1714: for ($version=1;$version<=$returnhash{'version'};$version++) {
1715: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1716: foreach (sort(keys %lasthash)) {
1717: my $value;
1718: if ($_ =~ /timestamp/) {
1719: $value=scalar(localtime($returnhash{$version.':'.$_}));
1720: } else {
1721: $value=$returnhash{$version.':'.$_};
1722: }
1723: $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
1724: }
1725: }
1726: }
1727: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1728: foreach (sort(keys %lasthash)) {
1729: my $value;
1730: if ($_ =~ /timestamp/) {
1731: $value=scalar(localtime($lasthash{$_}));
1732: } else {
1733: $value=$lasthash{$_};
1734: }
1735: $value=&Apache::lonnet::unescape($value);
1736: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1737: $prevattempts.='<td>'.$value.' </td>';
1738: }
1739: $prevattempts.='</tr></table></td></tr></table>';
1740: } else {
1741: $prevattempts='Nothing submitted - no attempts.';
1742: }
1743: } else {
1744: $prevattempts='No data.';
1745: }
1746: }
1747:
1748: sub relative_to_absolute {
1749: my ($url,$output)=@_;
1750: my $parser=HTML::TokeParser->new(\$output);
1751: my $token;
1752: my $thisdir=$url;
1753: my @rlinks=();
1754: while ($token=$parser->get_token) {
1755: if ($token->[0] eq 'S') {
1756: if ($token->[1] eq 'a') {
1757: if ($token->[2]->{'href'}) {
1758: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1759: }
1760: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1761: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1762: } elsif ($token->[1] eq 'base') {
1763: $thisdir=$token->[2]->{'href'};
1764: }
1765: }
1766: }
1767: $thisdir=~s-/[^/]*$--;
1768: foreach (@rlinks) {
1769: unless (($_=~/^http:\/\//i) ||
1770: ($_=~/^\//) ||
1771: ($_=~/^javascript:/i) ||
1772: ($_=~/^mailto:/i) ||
1773: ($_=~/^\#/)) {
1774: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1775: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1776: }
1777: }
1778: # -------------------------------------------------- Deal with Applet codebases
1779: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1780: return $output;
1781: }
1782:
1783: =pod
1784:
1785: =item * get_student_view
1786:
1787: show a snapshot of what student was looking at
1788:
1789: =cut
1790:
1791: sub get_student_view {
1792: my ($symb,$username,$domain,$courseid,$target) = @_;
1793: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1794: my (%old,%moreenv);
1795: my @elements=('symb','courseid','domain','username');
1796: foreach my $element (@elements) {
1797: $old{$element}=$ENV{'form.grade_'.$element};
1798: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1799: }
1800: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1801: &Apache::lonnet::appenv(%moreenv);
1802: $feedurl=&Apache::lonnet::clutter($feedurl);
1803: my $userview=&Apache::lonnet::ssi_body($feedurl);
1804: &Apache::lonnet::delenv('form.grade_');
1805: foreach my $element (@elements) {
1806: $ENV{'form.grade_'.$element}=$old{$element};
1807: }
1808: $userview=~s/\<body[^\>]*\>//gi;
1809: $userview=~s/\<\/body\>//gi;
1810: $userview=~s/\<html\>//gi;
1811: $userview=~s/\<\/html\>//gi;
1812: $userview=~s/\<head\>//gi;
1813: $userview=~s/\<\/head\>//gi;
1814: $userview=~s/action\s*\=/would_be_action\=/gi;
1815: $userview=&relative_to_absolute($feedurl,$userview);
1816: return $userview;
1817: }
1818:
1819: =pod
1820:
1821: =item * get_student_answers()
1822:
1823: show a snapshot of how student was answering problem
1824:
1825: =cut
1826:
1827: sub get_student_answers {
1828: my ($symb,$username,$domain,$courseid,%form) = @_;
1829: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1830: my (%old,%moreenv);
1831: my @elements=('symb','courseid','domain','username');
1832: foreach my $element (@elements) {
1833: $old{$element}=$ENV{'form.grade_'.$element};
1834: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1835: }
1836: $moreenv{'form.grade_target'}='answer';
1837: &Apache::lonnet::appenv(%moreenv);
1838: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1839: &Apache::lonnet::delenv('form.grade_');
1840: foreach my $element (@elements) {
1841: $ENV{'form.grade_'.$element}=$old{$element};
1842: }
1843: return $userview;
1844: }
1845:
1846: =pod
1847:
1848: =item * &submlink()
1849:
1850: Inputs: $text $uname $udom $symb
1851:
1852: Returns: A link to grades.pm such as to see the SUBM view of a student
1853:
1854: =cut
1855:
1856: ###############################################
1857: sub submlink {
1858: my ($text,$uname,$udom,$symb)=@_;
1859: if (!($uname && $udom)) {
1860: (my $cursymb, my $courseid,$udom,$uname)=
1861: &Apache::lonxml::whichuser($symb);
1862: if (!$symb) { $symb=$cursymb; }
1863: }
1864: if (!$symb) { $symb=&symbread(); }
1865: return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
1866: '&userdom='.$udom.'&command=submission">'.$text.'</a>';
1867: }
1868: ##############################################
1869:
1870: =pod
1871:
1872: =back
1873:
1874: =cut
1875:
1876: ###############################################
1877:
1878:
1879: sub timehash {
1880: my @ltime=localtime(shift);
1881: return ( 'seconds' => $ltime[0],
1882: 'minutes' => $ltime[1],
1883: 'hours' => $ltime[2],
1884: 'day' => $ltime[3],
1885: 'month' => $ltime[4]+1,
1886: 'year' => $ltime[5]+1900,
1887: 'weekday' => $ltime[6],
1888: 'dayyear' => $ltime[7]+1,
1889: 'dlsav' => $ltime[8] );
1890: }
1891:
1892: sub maketime {
1893: my %th=@_;
1894: return POSIX::mktime(
1895: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1896: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1897: }
1898:
1899:
1900: #########################################
1901: #
1902: # Retro-fixing of un-backward-compatible time format
1903:
1904: sub unsqltime {
1905: my $timestamp=shift;
1906: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1907: $timestamp=&maketime(
1908: 'year'=>$1,'month'=>$2,'day'=>$3,
1909: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1910: }
1911: return $timestamp;
1912: }
1913:
1914: #########################################
1915:
1916: sub findallcourses {
1917: my %courses=();
1918: my $now=time;
1919: foreach (keys %ENV) {
1920: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1921: my ($starttime,$endtime)=$ENV{$_};
1922: my $active=1;
1923: if ($starttime) {
1924: if ($now<$starttime) { $active=0; }
1925: }
1926: if ($endtime) {
1927: if ($now>$endtime) { $active=0; }
1928: }
1929: if ($active) { $courses{$1.'_'.$2}=1; }
1930: }
1931: }
1932: return keys %courses;
1933: }
1934:
1935: ###############################################
1936: ###############################################
1937:
1938: =pod
1939:
1940: =head1 Domain Template Functions
1941:
1942: =over 4
1943:
1944: =item * &determinedomain()
1945:
1946: Inputs: $domain (usually will be undef)
1947:
1948: Returns: Determines which domain should be used for designs
1949:
1950: =cut
1951:
1952: ###############################################
1953: sub determinedomain {
1954: my $domain=shift;
1955: if (! $domain) {
1956: # Determine domain if we have not been given one
1957: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1958: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1959: if ($ENV{'request.role.domain'}) {
1960: $domain=$ENV{'request.role.domain'};
1961: }
1962: }
1963: return $domain;
1964: }
1965: ###############################################
1966: =pod
1967:
1968: =item * &domainlogo()
1969:
1970: Inputs: $domain (usually will be undef)
1971:
1972: Returns: A link to a domain logo, if the domain logo exists.
1973: If the domain logo does not exist, a description of the domain.
1974:
1975: =cut
1976:
1977: ###############################################
1978: sub domainlogo {
1979: my $domain = &determinedomain(shift);
1980: # See if there is a logo
1981: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1982: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
1983: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1984: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
1985: '/adm/lonDomLogos/'.$domain.'.gif" alt="'.$domain.'" />';
1986: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1987: return $Apache::lonnet::domaindescription{$domain};
1988: } else {
1989: return '';
1990: }
1991: }
1992: ##############################################
1993:
1994: =pod
1995:
1996: =item * &designparm()
1997:
1998: Inputs: $which parameter; $domain (usually will be undef)
1999:
2000: Returns: value of designparamter $which
2001:
2002: =cut
2003:
2004: ##############################################
2005: sub designparm {
2006: my ($which,$domain)=@_;
2007: if ($ENV{'browser.blackwhite'} eq 'on') {
2008: if ($which=~/\.(font|alink|vlink|link)$/) {
2009: return '#000000';
2010: }
2011: if ($which=~/\.(pgbg|sidebg)$/) {
2012: return '#FFFFFF';
2013: }
2014: if ($which=~/\.tabbg$/) {
2015: return '#CCCCCC';
2016: }
2017: }
2018: if ($ENV{'environment.color.'.$which}) {
2019: return $ENV{'environment.color.'.$which};
2020: }
2021: $domain=&determinedomain($domain);
2022: if ($designhash{$domain.'.'.$which}) {
2023: return $designhash{$domain.'.'.$which};
2024: } else {
2025: return $designhash{'default.'.$which};
2026: }
2027: }
2028:
2029: ###############################################
2030: ###############################################
2031:
2032: =pod
2033:
2034: =back
2035:
2036: =head1 HTTP Helpers
2037:
2038: =over 4
2039:
2040: =item * &bodytag()
2041:
2042: Returns a uniform header for LON-CAPA web pages.
2043:
2044: Inputs:
2045:
2046: =over 4
2047:
2048: =item * $title, A title to be displayed on the page.
2049:
2050: =item * $function, the current role (can be undef).
2051:
2052: =item * $addentries, extra parameters for the <body> tag.
2053:
2054: =item * $bodyonly, if defined, only return the <body> tag.
2055:
2056: =item * $domain, if defined, force a given domain.
2057:
2058: =item * $forcereg, if page should register as content page (relevant for
2059: text interface only)
2060:
2061: =back
2062:
2063: Returns: A uniform header for LON-CAPA web pages.
2064: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2065: If $bodyonly is undef or zero, an html string containing a <body> tag and
2066: other decorations will be returned.
2067:
2068: =cut
2069:
2070: sub bodytag {
2071: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2072: $title=&mt($title);
2073: unless ($function) {
2074: $function='student';
2075: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2076: $function='coordinator';
2077: }
2078: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2079: $function='admin';
2080: }
2081: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2082: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2083: $function='author';
2084: }
2085: }
2086: my $img=&designparm($function.'.img',$domain);
2087: my $pgbg=&designparm($function.'.pgbg',$domain);
2088: my $tabbg=&designparm($function.'.tabbg',$domain);
2089: my $font=&designparm($function.'.font',$domain);
2090: my $link=&designparm($function.'.link',$domain);
2091: my $alink=&designparm($function.'.alink',$domain);
2092: my $vlink=&designparm($function.'.vlink',$domain);
2093: my $sidebg=&designparm($function.'.sidebg',$domain);
2094: # Accessibility font enhance
2095: unless ($addentries) { $addentries=''; }
2096: my $addstyle='';
2097: if ($ENV{'browser.fontenhance'} eq 'on') {
2098: $addstyle=' font-size: x-large;';
2099: }
2100: # role and realm
2101: my ($role,$realm)
2102: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2103: # realm
2104: if ($ENV{'request.course.id'}) {
2105: $realm=
2106: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2107: }
2108: unless ($realm) { $realm=' '; }
2109: # Set messages
2110: my $messages=&domainlogo($domain);
2111: # Port for miniserver
2112: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2113: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2114: # construct main body tag
2115: my $bodytag = <<END;
2116: <style>
2117: h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
2118: a:focus { color: red; background: yellow }
2119: </style>
2120: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2121: style="margin-top: 0px;$addstyle" $addentries>
2122: END
2123: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2124: $lonhttpdPort.$img.'" alt="'.$function.'" />';
2125: if ($bodyonly) {
2126: return $bodytag;
2127: } elsif ($ENV{'browser.interface'} eq 'textual') {
2128: # Accessibility
2129: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2130: $forcereg).
2131: '<h1>LON-CAPA: '.$title.'</h1>';
2132: } elsif ($ENV{'environment.remote'} eq 'off') {
2133: # No Remote
2134: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2135: $forcereg).
2136: '<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.
2137: '</b></font></td></tr></table>';
2138: }
2139:
2140: #
2141: # Top frame rendering, Remote is up
2142: #
2143: return(<<ENDBODY);
2144: $bodytag
2145: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2146: <tr><td bgcolor="$sidebg">
2147: $upperleft</td>
2148: <td bgcolor="$sidebg" align="right">$messages </td>
2149: </tr>
2150: <tr>
2151: <td rowspan="3" bgcolor="$tabbg">
2152: <font size="5" face="Arial, Helvetica, sans-serif"><b>$title</b></font>
2153: <td bgcolor="$tabbg" align="right">
2154: <font size="2" face="Arial, Helvetica, sans-serif">
2155: $ENV{'environment.firstname'}
2156: $ENV{'environment.middlename'}
2157: $ENV{'environment.lastname'}
2158: $ENV{'environment.generation'}
2159: </font>
2160: </td>
2161: </tr>
2162: <tr><td bgcolor="$tabbg" align="right">
2163: <font size="2" face="Arial, Helvetica, sans-serif">$role</font>
2164: </td></tr>
2165: <tr>
2166: <td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font> </td></tr>
2167: </table><br>
2168: ENDBODY
2169: }
2170:
2171: ###############################################
2172:
2173: sub get_posted_cgi {
2174: my $r=shift;
2175:
2176: my $buffer;
2177:
2178: $r->read($buffer,$r->header_in('Content-length'),0);
2179: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2180: my @pairs=split(/&/,$buffer);
2181: my $pair;
2182: foreach $pair (@pairs) {
2183: my ($name,$value) = split(/=/,$pair);
2184: $value =~ tr/+/ /;
2185: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2186: $name =~ tr/+/ /;
2187: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2188: &add_to_env("form.$name",$value);
2189: }
2190: } else {
2191: my $contentsep=$1;
2192: my @lines = split (/\n/,$buffer);
2193: my $name='';
2194: my $value='';
2195: my $fname='';
2196: my $fmime='';
2197: my $i;
2198: for ($i=0;$i<=$#lines;$i++) {
2199: if ($lines[$i]=~/^$contentsep/) {
2200: if ($name) {
2201: chomp($value);
2202: if ($fname) {
2203: $ENV{"form.$name.filename"}=$fname;
2204: $ENV{"form.$name.mimetype"}=$fmime;
2205: } else {
2206: $value=~s/\s+$//s;
2207: }
2208: &add_to_env("form.$name",$value);
2209: }
2210: if ($i<$#lines) {
2211: $i++;
2212: $lines[$i]=~
2213: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2214: $name=$1;
2215: $value='';
2216: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2217: $fname=$1;
2218: if
2219: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2220: $fmime=$1;
2221: $i++;
2222: } else {
2223: $fmime='';
2224: }
2225: } else {
2226: $fname='';
2227: $fmime='';
2228: }
2229: $i++;
2230: }
2231: } else {
2232: $value.=$lines[$i]."\n";
2233: }
2234: }
2235: }
2236: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2237: $r->method_number(M_GET);
2238: $r->method('GET');
2239: $r->headers_in->unset('Content-length');
2240: }
2241:
2242: =pod
2243:
2244: =item * get_unprocessed_cgi($query,$possible_names)
2245:
2246: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2247: $query. The parameters listed in $possible_names (an array reference),
2248: will be set in $ENV{'form.name'} if they do not already exist.
2249:
2250: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2251: $possible_names is an ref to an array of form element names. As an example:
2252: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2253: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2254:
2255: =cut
2256:
2257: sub get_unprocessed_cgi {
2258: my ($query,$possible_names)= @_;
2259: # $Apache::lonxml::debug=1;
2260: foreach (split(/&/,$query)) {
2261: my ($name, $value) = split(/=/,$_);
2262: $name = &Apache::lonnet::unescape($name);
2263: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2264: $value =~ tr/+/ /;
2265: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2266: &Apache::lonxml::debug("Seting :$name: to :$value:");
2267: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2268: }
2269: }
2270: }
2271:
2272: =pod
2273:
2274: =item * cacheheader()
2275:
2276: returns cache-controlling header code
2277:
2278: =cut
2279:
2280: sub cacheheader {
2281: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2282: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2283: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2284: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2285: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2286: return $output;
2287: }
2288:
2289: =pod
2290:
2291: =item * no_cache($r)
2292:
2293: specifies header code to not have cache
2294:
2295: =cut
2296:
2297: sub no_cache {
2298: my ($r) = @_;
2299: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2300: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2301: $r->no_cache(1);
2302: $r->header_out("Pragma" => "no-cache");
2303: #$r->header_out("Expires" => $date);
2304: }
2305:
2306: sub content_type {
2307: my ($r,$type,$charset) = @_;
2308: unless ($charset) {
2309: $charset=&Apache::lonlocal::current_encoding;
2310: }
2311: $r->content_type($type.($charset?'; charset='.$charset:''));
2312: }
2313:
2314: =pod
2315:
2316: =item * add_to_env($name,$value)
2317:
2318: adds $name to the %ENV hash with value
2319: $value, if $name already exists, the entry is converted to an array
2320: reference and $value is added to the array.
2321:
2322: =cut
2323:
2324: sub add_to_env {
2325: my ($name,$value)=@_;
2326: if (defined($ENV{$name})) {
2327: if (ref($ENV{$name})) {
2328: #already have multiple values
2329: push(@{ $ENV{$name} },$value);
2330: } else {
2331: #first time seeing multiple values, convert hash entry to an arrayref
2332: my $first=$ENV{$name};
2333: undef($ENV{$name});
2334: push(@{ $ENV{$name} },$first,$value);
2335: }
2336: } else {
2337: $ENV{$name}=$value;
2338: }
2339: }
2340:
2341: =pod
2342:
2343: =item * get_env_multiple($name)
2344:
2345: gets $name from the %ENV hash, it seemlessly handles the cases where multiple
2346: values may be defined and end up as an array ref.
2347:
2348: returns an array of values
2349:
2350: =cut
2351:
2352: sub get_env_multiple {
2353: my ($name) = @_;
2354: my @values;
2355: if (defined($ENV{$name})) {
2356: # exists is it an array
2357: if (ref($ENV{$name})) {
2358: @values=@{ $ENV{$name} };
2359: } else {
2360: $values[0]=$ENV{$name};
2361: }
2362: }
2363: return(@values);
2364: }
2365:
2366:
2367: =pod
2368:
2369: =back
2370:
2371: =head1 CSV Upload/Handling functions
2372:
2373: =over 4
2374:
2375: =item * upfile_store($r)
2376:
2377: Store uploaded file, $r should be the HTTP Request object,
2378: needs $ENV{'form.upfile'}
2379: returns $datatoken to be put into hidden field
2380:
2381: =cut
2382:
2383: sub upfile_store {
2384: my $r=shift;
2385: $ENV{'form.upfile'}=~s/\r/\n/gs;
2386: $ENV{'form.upfile'}=~s/\f/\n/gs;
2387: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2388: $ENV{'form.upfile'}=~s/\n+$//gs;
2389:
2390: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2391: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2392: {
2393: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
2394: '/tmp/'.$datatoken.'.tmp');
2395: print $fh $ENV{'form.upfile'};
2396: }
2397: return $datatoken;
2398: }
2399:
2400: =pod
2401:
2402: =item * load_tmp_file($r)
2403:
2404: Load uploaded file from tmp, $r should be the HTTP Request object,
2405: needs $ENV{'form.datatoken'},
2406: sets $ENV{'form.upfile'} to the contents of the file
2407:
2408: =cut
2409:
2410: sub load_tmp_file {
2411: my $r=shift;
2412: my @studentdata=();
2413: {
2414: my $fh;
2415: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
2416: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
2417: @studentdata=<$fh>;
2418: }
2419: }
2420: $ENV{'form.upfile'}=join('',@studentdata);
2421: }
2422:
2423: =pod
2424:
2425: =item * upfile_record_sep()
2426:
2427: Separate uploaded file into records
2428: returns array of records,
2429: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2430:
2431: =cut
2432:
2433: sub upfile_record_sep {
2434: if ($ENV{'form.upfiletype'} eq 'xml') {
2435: } else {
2436: return split(/\n/,$ENV{'form.upfile'});
2437: }
2438: }
2439:
2440: =pod
2441:
2442: =item * record_sep($record)
2443:
2444: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2445:
2446: =cut
2447:
2448: sub record_sep {
2449: my $record=shift;
2450: my %components=();
2451: if ($ENV{'form.upfiletype'} eq 'xml') {
2452: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2453: my $i=0;
2454: foreach (split(/\s+/,$record)) {
2455: my $field=$_;
2456: $field=~s/^(\"|\')//;
2457: $field=~s/(\"|\')$//;
2458: $components{$i}=$field;
2459: $i++;
2460: }
2461: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2462: my $i=0;
2463: foreach (split(/\t+/,$record)) {
2464: my $field=$_;
2465: $field=~s/^(\"|\')//;
2466: $field=~s/(\"|\')$//;
2467: $components{$i}=$field;
2468: $i++;
2469: }
2470: } else {
2471: my @allfields=split(/\,/,$record);
2472: my $i=0;
2473: my $j;
2474: for ($j=0;$j<=$#allfields;$j++) {
2475: my $field=$allfields[$j];
2476: if ($field=~/^\s*(\"|\')/) {
2477: my $delimiter=$1;
2478: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2479: $j++;
2480: $field.=','.$allfields[$j];
2481: }
2482: $field=~s/^\s*$delimiter//;
2483: $field=~s/$delimiter\s*$//;
2484: }
2485: $components{$i}=$field;
2486: $i++;
2487: }
2488: }
2489: return %components;
2490: }
2491:
2492: ######################################################
2493: ######################################################
2494:
2495: =pod
2496:
2497: =item * upfile_select_html()
2498:
2499: Return HTML code to select a file from the users machine and specify
2500: the file type.
2501:
2502: =cut
2503:
2504: ######################################################
2505: ######################################################
2506: sub upfile_select_html {
2507: my %Types = (
2508: csv => &mt('CSV (comma separated values, spreadsheet)'),
2509: space => &mt('Space separated'),
2510: tab => &mt('Tabulator separated'),
2511: # xml => &mt('HTML/XML'),
2512: );
2513: my $Str = '<input type="file" name="upfile" size="50" />'.
2514: '<br />Type: <select name="upfiletype">';
2515: foreach my $type (sort(keys(%Types))) {
2516: $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
2517: }
2518: $Str .= "</select>\n";
2519: return $Str;
2520: }
2521:
2522: ######################################################
2523: ######################################################
2524:
2525: =pod
2526:
2527: =item * csv_print_samples($r,$records)
2528:
2529: Prints a table of sample values from each column uploaded $r is an
2530: Apache Request ref, $records is an arrayref from
2531: &Apache::loncommon::upfile_record_sep
2532:
2533: =cut
2534:
2535: ######################################################
2536: ######################################################
2537: sub csv_print_samples {
2538: my ($r,$records) = @_;
2539: my (%sone,%stwo,%sthree);
2540: %sone=&record_sep($$records[0]);
2541: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2542: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2543: #
2544: $r->print(&mt('Samples').'<br /><table border="2"><tr>');
2545: foreach (sort({$a <=> $b} keys(%sone))) {
2546: $r->print('<th>'.&mt('Column [_1]',($_+1)).'</th>'); }
2547: $r->print('</tr>');
2548: foreach my $hash (\%sone,\%stwo,\%sthree) {
2549: $r->print('<tr>');
2550: foreach (sort({$a <=> $b} keys(%sone))) {
2551: $r->print('<td>');
2552: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2553: $r->print('</td>');
2554: }
2555: $r->print('</tr>');
2556: }
2557: $r->print('</tr></table><br />'."\n");
2558: }
2559:
2560: ######################################################
2561: ######################################################
2562:
2563: =pod
2564:
2565: =item * csv_print_select_table($r,$records,$d)
2566:
2567: Prints a table to create associations between values and table columns.
2568:
2569: $r is an Apache Request ref,
2570: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2571: $d is an array of 2 element arrays (internal name, displayed name)
2572:
2573: =cut
2574:
2575: ######################################################
2576: ######################################################
2577: sub csv_print_select_table {
2578: my ($r,$records,$d) = @_;
2579: my $i=0;my %sone;
2580: %sone=&record_sep($$records[0]);
2581: $r->print(&mt('Associate columns with student attributes.')."\n".
2582: '<table border="2"><tr>'.
2583: '<th>'.&mt('Attribute').'</th>'.
2584: '<th>'.&mt('Column').'</th></tr>'."\n");
2585: foreach (@$d) {
2586: my ($value,$display)=@{ $_ };
2587: $r->print('<tr><td>'.$display.'</td>');
2588:
2589: $r->print('<td><select name=f'.$i.
2590: ' onchange="javascript:flip(this.form,'.$i.');">');
2591: $r->print('<option value="none"></option>');
2592: foreach (sort({$a <=> $b} keys(%sone))) {
2593: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2594: }
2595: $r->print('</select></td></tr>'."\n");
2596: $i++;
2597: }
2598: $i--;
2599: return $i;
2600: }
2601:
2602: ######################################################
2603: ######################################################
2604:
2605: =pod
2606:
2607: =item * csv_samples_select_table($r,$records,$d)
2608:
2609: Prints a table of sample values from the upload and can make associate samples to internal names.
2610:
2611: $r is an Apache Request ref,
2612: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2613: $d is an array of 2 element arrays (internal name, displayed name)
2614:
2615: =cut
2616:
2617: ######################################################
2618: ######################################################
2619: sub csv_samples_select_table {
2620: my ($r,$records,$d) = @_;
2621: my %sone; my %stwo; my %sthree;
2622: my $i=0;
2623: #
2624: $r->print('<table border=2><tr><th>'.
2625: &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
2626: %sone=&record_sep($$records[0]);
2627: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2628: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2629: #
2630: foreach (sort keys %sone) {
2631: $r->print('<tr><td><select name="f'.$i.'"'.
2632: ' onchange="javascript:flip(this.form,'.$i.');">');
2633: foreach (@$d) {
2634: my ($value,$display)=@{ $_ };
2635: $r->print('<option value="'.$value.'">'.$display.'</option>');
2636: }
2637: $r->print('</select></td><td>');
2638: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2639: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2640: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2641: $r->print('</td></tr>');
2642: $i++;
2643: }
2644: $i--;
2645: return($i);
2646: }
2647:
2648: ######################################################
2649: ######################################################
2650:
2651: =pod
2652:
2653: =item clean_excel_name($name)
2654:
2655: Returns a replacement for $name which does not contain any illegal characters.
2656:
2657: =cut
2658:
2659: ######################################################
2660: ######################################################
2661: sub clean_excel_name {
2662: my ($name) = @_;
2663: $name =~ s/[:\*\?\/\\]//g;
2664: if (length($name) > 31) {
2665: $name = substr($name,0,31);
2666: }
2667: return $name;
2668: }
2669:
2670: =pod
2671:
2672: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2673:
2674: Returns either 1 or undef
2675:
2676: 1 if the part is to be hidden, undef if it is to be shown
2677:
2678: Arguments are:
2679:
2680: $id the id of the part to be checked
2681: $symb, optional the symb of the resource to check
2682: $udom, optional the domain of the user to check for
2683: $uname, optional the username of the user to check for
2684:
2685: =cut
2686:
2687: sub check_if_partid_hidden {
2688: my ($id,$symb,$udom,$uname) = @_;
2689: my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
2690: $symb,$udom,$uname);
2691: my $truth=1;
2692: #if the string starts with !, then the list is the list to show not hide
2693: if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
2694: my @hiddenlist=split(/,/,$hiddenparts);
2695: foreach my $checkid (@hiddenlist) {
2696: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
2697: }
2698: return !$truth;
2699: }
2700:
2701:
2702: ############################################################
2703: ############################################################
2704:
2705: =pod
2706:
2707: =back
2708:
2709: =head1 cgi-bin script and graphing routines
2710:
2711: =over 4
2712:
2713: =item get_cgi_id
2714:
2715: Inputs: none
2716:
2717: Returns an id which can be used to pass environment variables
2718: to various cgi-bin scripts. These environment variables will
2719: be removed from the users environment after a given time by
2720: the routine &Apache::lonnet::transfer_profile_to_env.
2721:
2722: =cut
2723:
2724: ############################################################
2725: ############################################################
2726: my $uniq=0;
2727: sub get_cgi_id {
2728: $uniq=($uniq+1)%100000;
2729: return (time.'_'.$uniq);
2730: }
2731:
2732: ############################################################
2733: ############################################################
2734:
2735: =pod
2736:
2737: =item DrawBarGraph
2738:
2739: Facilitates the plotting of data in a (stacked) bar graph.
2740: Puts plot definition data into the users environment in order for
2741: graph.png to plot it. Returns an <img> tag for the plot.
2742: The bars on the plot are labeled '1','2',...,'n'.
2743:
2744: Inputs:
2745:
2746: =over 4
2747:
2748: =item $Title: string, the title of the plot
2749:
2750: =item $xlabel: string, text describing the X-axis of the plot
2751:
2752: =item $ylabel: string, text describing the Y-axis of the plot
2753:
2754: =item $Max: scalar, the maximum Y value to use in the plot
2755: If $Max is < any data point, the graph will not be rendered.
2756:
2757: =item $colors: array ref holding the colors to be used for the data sets when
2758: they are plotted. If undefined, default values will be used.
2759:
2760: =item @Values: An array of array references. Each array reference holds data
2761: to be plotted in a stacked bar chart.
2762:
2763: =back
2764:
2765: Returns:
2766:
2767: An <img> tag which references graph.png and the appropriate identifying
2768: information for the plot.
2769:
2770: =cut
2771:
2772: ############################################################
2773: ############################################################
2774: sub DrawBarGraph {
2775: my ($Title,$xlabel,$ylabel,$Max,$colors,@Values)=@_;
2776: #
2777: if (! defined($colors)) {
2778: $colors = ['#33ff00',
2779: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
2780: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
2781: ];
2782: }
2783: #
2784: my $identifier = &get_cgi_id();
2785: my $id = 'cgi.'.$identifier;
2786: if (! @Values || ref($Values[0]) ne 'ARRAY') {
2787: return '';
2788: }
2789: my $NumBars = scalar(@{$Values[0]});
2790: my %ValuesHash;
2791: my $NumSets=1;
2792: foreach my $array (@Values) {
2793: next if (! ref($array));
2794: $ValuesHash{$id.'.data.'.$NumSets++} =
2795: join(',',@$array);
2796: }
2797: #
2798: my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
2799: if ($NumBars < 10) {
2800: $width = 120+$NumBars*15;
2801: $xskip = 1;
2802: $bar_width = 15;
2803: } elsif ($NumBars <= 25) {
2804: $width = 120+$NumBars*11;
2805: $xskip = 5;
2806: $bar_width = 8;
2807: } elsif ($NumBars <= 50) {
2808: $width = 120+$NumBars*8;
2809: $xskip = 5;
2810: $bar_width = 4;
2811: } else {
2812: $width = 120+$NumBars*8;
2813: $xskip = 5;
2814: $bar_width = 4;
2815: }
2816: #
2817: my @Labels;
2818: for (my $i=0;$i<@{$Values[0]};$i++) {
2819: push (@Labels,$i+1);
2820: }
2821: #
2822: $Max = 1 if ($Max < 1);
2823: if ( int($Max) < $Max ) {
2824: $Max++;
2825: $Max = int($Max);
2826: }
2827: $Title = '' if (! defined($Title));
2828: $xlabel = '' if (! defined($xlabel));
2829: $ylabel = '' if (! defined($ylabel));
2830: $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
2831: $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
2832: $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
2833: $ValuesHash{$id.'.y_max_value'} = $Max;
2834: $ValuesHash{$id.'.NumBars'} = $NumBars;
2835: $ValuesHash{$id.'.NumSets'} = $NumSets;
2836: $ValuesHash{$id.'.PlotType'} = 'bar';
2837: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2838: $ValuesHash{$id.'.height'} = $height;
2839: $ValuesHash{$id.'.width'} = $width;
2840: $ValuesHash{$id.'.xskip'} = $xskip;
2841: $ValuesHash{$id.'.bar_width'} = $bar_width;
2842: $ValuesHash{$id.'.labels'} = join(',',@Labels);
2843: #
2844: &Apache::lonnet::appenv(%ValuesHash);
2845: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2846: }
2847:
2848: ############################################################
2849: ############################################################
2850:
2851: =pod
2852:
2853: =item DrawXYGraph
2854:
2855: Facilitates the plotting of data in an XY graph.
2856: Puts plot definition data into the users environment in order for
2857: graph.png to plot it. Returns an <img> tag for the plot.
2858:
2859: Inputs:
2860:
2861: =over 4
2862:
2863: =item $Title: string, the title of the plot
2864:
2865: =item $xlabel: string, text describing the X-axis of the plot
2866:
2867: =item $ylabel: string, text describing the Y-axis of the plot
2868:
2869: =item $Max: scalar, the maximum Y value to use in the plot
2870: If $Max is < any data point, the graph will not be rendered.
2871:
2872: =item $colors: Array ref containing the hex color codes for the data to be
2873: plotted in. If undefined, default values will be used.
2874:
2875: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2876:
2877: =item $Ydata: Array ref containing Array refs.
2878: Each of the contained arrays will be plotted as a seperate curve.
2879:
2880: =item %Values: hash indicating or overriding any default values which are
2881: passed to graph.png.
2882: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2883:
2884: =back
2885:
2886: Returns:
2887:
2888: An <img> tag which references graph.png and the appropriate identifying
2889: information for the plot.
2890:
2891: =cut
2892:
2893: ############################################################
2894: ############################################################
2895: sub DrawXYGraph {
2896: my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
2897: #
2898: # Create the identifier for the graph
2899: my $identifier = &get_cgi_id();
2900: my $id = 'cgi.'.$identifier;
2901: #
2902: $Title = '' if (! defined($Title));
2903: $xlabel = '' if (! defined($xlabel));
2904: $ylabel = '' if (! defined($ylabel));
2905: my %ValuesHash =
2906: (
2907: $id.'.title' => &Apache::lonnet::escape($Title),
2908: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
2909: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
2910: $id.'.y_max_value'=> $Max,
2911: $id.'.labels' => join(',',@$Xlabels),
2912: $id.'.PlotType' => 'XY',
2913: );
2914: #
2915: if (defined($colors) && ref($colors) eq 'ARRAY') {
2916: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2917: }
2918: #
2919: if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
2920: return '';
2921: }
2922: my $NumSets=1;
2923: foreach my $array (@{$Ydata}){
2924: next if (! ref($array));
2925: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
2926: }
2927: $ValuesHash{$id.'.NumSets'} = $NumSets-1;
2928: #
2929: # Deal with other parameters
2930: while (my ($key,$value) = each(%Values)) {
2931: $ValuesHash{$id.'.'.$key} = $value;
2932: }
2933: #
2934: &Apache::lonnet::appenv(%ValuesHash);
2935: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2936: }
2937:
2938: ############################################################
2939: ############################################################
2940:
2941: =pod
2942:
2943: =item DrawXYYGraph
2944:
2945: Facilitates the plotting of data in an XY graph with two Y axes.
2946: Puts plot definition data into the users environment in order for
2947: graph.png to plot it. Returns an <img> tag for the plot.
2948:
2949: Inputs:
2950:
2951: =over 4
2952:
2953: =item $Title: string, the title of the plot
2954:
2955: =item $xlabel: string, text describing the X-axis of the plot
2956:
2957: =item $ylabel: string, text describing the Y-axis of the plot
2958:
2959: =item $colors: Array ref containing the hex color codes for the data to be
2960: plotted in. If undefined, default values will be used.
2961:
2962: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2963:
2964: =item $Ydata1: The first data set
2965:
2966: =item $Min1: The minimum value of the left Y-axis
2967:
2968: =item $Max1: The maximum value of the left Y-axis
2969:
2970: =item $Ydata2: The second data set
2971:
2972: =item $Min2: The minimum value of the right Y-axis
2973:
2974: =item $Max2: The maximum value of the left Y-axis
2975:
2976: =item %Values: hash indicating or overriding any default values which are
2977: passed to graph.png.
2978: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2979:
2980: =back
2981:
2982: Returns:
2983:
2984: An <img> tag which references graph.png and the appropriate identifying
2985: information for the plot.
2986:
2987: =cut
2988:
2989: ############################################################
2990: ############################################################
2991: sub DrawXYYGraph {
2992: my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
2993: $Ydata2,$Min2,$Max2,%Values)=@_;
2994: #
2995: # Create the identifier for the graph
2996: my $identifier = &get_cgi_id();
2997: my $id = 'cgi.'.$identifier;
2998: #
2999: $Title = '' if (! defined($Title));
3000: $xlabel = '' if (! defined($xlabel));
3001: $ylabel = '' if (! defined($ylabel));
3002: my %ValuesHash =
3003: (
3004: $id.'.title' => &Apache::lonnet::escape($Title),
3005: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
3006: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
3007: $id.'.labels' => join(',',@$Xlabels),
3008: $id.'.PlotType' => 'XY',
3009: $id.'.NumSets' => 2,
3010: $id.'.two_axes' => 1,
3011: $id.'.y1_max_value' => $Max1,
3012: $id.'.y1_min_value' => $Min1,
3013: $id.'.y2_max_value' => $Max2,
3014: $id.'.y2_min_value' => $Min2,
3015: );
3016: #
3017: if (defined($colors) && ref($colors) eq 'ARRAY') {
3018: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3019: }
3020: #
3021: if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
3022: ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
3023: return '';
3024: }
3025: my $NumSets=1;
3026: foreach my $array ($Ydata1,$Ydata2){
3027: next if (! ref($array));
3028: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3029: }
3030: #
3031: # Deal with other parameters
3032: while (my ($key,$value) = each(%Values)) {
3033: $ValuesHash{$id.'.'.$key} = $value;
3034: }
3035: #
3036: &Apache::lonnet::appenv(%ValuesHash);
3037: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3038: }
3039:
3040: ############################################################
3041: ############################################################
3042:
3043: =pod
3044:
3045: =back
3046:
3047: =head1 Statistics helper routines?
3048:
3049: Bad place for them but what the hell.
3050:
3051: =over 4
3052:
3053: =item &chartlink
3054:
3055: Returns a link to the chart for a specific student.
3056:
3057: Inputs:
3058:
3059: =over 4
3060:
3061: =item $linktext: The text of the link
3062:
3063: =item $sname: The students username
3064:
3065: =item $sdomain: The students domain
3066:
3067: =back
3068:
3069: =back
3070:
3071: =cut
3072:
3073: ############################################################
3074: ############################################################
3075: sub chartlink {
3076: my ($linktext, $sname, $sdomain) = @_;
3077: my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
3078: '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
3079: '&chartoutputmode='.HTML::Entities::encode('html, with all links').
3080: '">'.$linktext.'</a>';
3081: }
3082:
3083: #######################################################
3084: #######################################################
3085:
3086: =pod
3087:
3088: =head1 Course Environment Routines
3089:
3090: =over 4
3091:
3092: =item &restore_course_settings
3093:
3094: =item &store_course_settings
3095:
3096: Restores/Store indicated form parameters from the course environment.
3097: Will not overwrite existing values of the form parameters.
3098:
3099: Inputs:
3100: a scalar describing the data (e.g. 'chart', 'problem_analysis')
3101:
3102: a hash ref describing the data to be stored. For example:
3103:
3104: %Save_Parameters = ('Status' => 'scalar',
3105: 'chartoutputmode' => 'scalar',
3106: 'chartoutputdata' => 'scalar',
3107: 'Section' => 'array',
3108: 'StudentData' => 'array',
3109: 'Maps' => 'array');
3110:
3111: Returns: both routines return nothing
3112:
3113: =cut
3114:
3115: #######################################################
3116: #######################################################
3117: sub store_course_settings {
3118: # save to the environment
3119: # appenv the same items, just to be safe
3120: my $courseid = $ENV{'request.course.id'};
3121: my $coursedom = $ENV{'course.'.$courseid.'.domain'};
3122: my ($prefix,$Settings) = @_;
3123: my %SaveHash;
3124: my %AppHash;
3125: while (my ($setting,$type) = each(%$Settings)) {
3126: my $basename = 'env.internal.'.$prefix.'.'.$setting;
3127: my $envname = 'course.'.$courseid.'.'.$basename;
3128: if (exists($ENV{'form.'.$setting})) {
3129: # Save this value away
3130: if ($type eq 'scalar' &&
3131: (! exists($ENV{$envname}) ||
3132: $ENV{$envname} ne $ENV{'form.'.$setting})) {
3133: $SaveHash{$basename} = $ENV{'form.'.$setting};
3134: $AppHash{$envname} = $ENV{'form.'.$setting};
3135: } elsif ($type eq 'array') {
3136: my $stored_form;
3137: if (ref($ENV{'form.'.$setting})) {
3138: $stored_form = join(',',
3139: map {
3140: &Apache::lonnet::escape($_);
3141: } sort(@{$ENV{'form.'.$setting}}));
3142: } else {
3143: $stored_form =
3144: &Apache::lonnet::escape($ENV{'form.'.$setting});
3145: }
3146: # Determine if the array contents are the same.
3147: if ($stored_form ne $ENV{$envname}) {
3148: $SaveHash{$basename} = $stored_form;
3149: $AppHash{$envname} = $stored_form;
3150: }
3151: }
3152: }
3153: }
3154: my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
3155: $coursedom,
3156: $ENV{'course.'.$courseid.'.num'});
3157: if ($put_result !~ /^(ok|delayed)/) {
3158: &Apache::lonnet::logthis('unable to save form parameters, '.
3159: 'got error:'.$put_result);
3160: }
3161: # Make sure these settings stick around in this session, too
3162: &Apache::lonnet::appenv(%AppHash);
3163: return;
3164: }
3165:
3166: sub restore_course_settings {
3167: my $courseid = $ENV{'request.course.id'};
3168: my ($prefix,$Settings) = @_;
3169: while (my ($setting,$type) = each(%$Settings)) {
3170: next if (exists($ENV{'form.'.$setting}));
3171: my $envname = 'course.'.$courseid.'.env.internal.'.$prefix.
3172: '.'.$setting;
3173: if (exists($ENV{$envname})) {
3174: if ($type eq 'scalar') {
3175: $ENV{'form.'.$setting} = $ENV{$envname};
3176: } elsif ($type eq 'array') {
3177: $ENV{'form.'.$setting} = [
3178: map {
3179: &Apache::lonnet::unescape($_);
3180: } split(',',$ENV{$envname})
3181: ];
3182: }
3183: }
3184: }
3185: }
3186:
3187: ############################################################
3188: ############################################################
3189:
3190: sub propath {
3191: my ($udom,$uname)=@_;
3192: $udom=~s/\W//g;
3193: $uname=~s/\W//g;
3194: my $subdir=$uname.'__';
3195: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3196: my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3197: return $proname;
3198: }
3199:
3200: sub icon {
3201: my ($file)=@_;
3202: my @file_ext = split(/\./,$file);
3203: my $curfext = $file_ext[-1];
3204: my $iconname="unknown.gif";
3205: my $embstyle = &Apache::loncommon::fileembstyle($curfext);
3206: # The unless conditional that follows is a bit of overkill
3207: $iconname = $curfext.".gif" unless
3208: (!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn');
3209: return $Apache::lonnet::perlvar{'lonIconsURL'}."/$iconname";
3210: }
3211:
3212: =pod
3213:
3214: =back
3215:
3216: =cut
3217:
3218: 1;
3219: __END__;
3220:
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