1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.158 2003/12/08 15:06:42 raeburn 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 $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
106: '/language.tab';
107: if ( open(my $fh,"<$langtabfile") ) {
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}=$sup;
115: }
116: }
117: close($fh);
118: }
119: }
120: # ------------------------------------------------------------------ copyrights
121: {
122: my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
123: '/copyright.tab';
124: if ( open (my $fh,"<$copyrightfile") ) {
125: while (<$fh>) {
126: next if /^\#/;
127: chomp;
128: my ($key,$val)=(split(/\s+/,$_,2));
129: $cprtag{$key}=$val;
130: }
131: close($fh);
132: }
133: }
134:
135: # -------------------------------------------------------------- domain designs
136:
137: my $filename;
138: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
139: opendir(DIR,$designdir);
140: while ($filename=readdir(DIR)) {
141: my ($domain)=($filename=~/^(\w+)\./);
142: {
143: my $designfile = $designdir.'/'.$filename;
144: if ( open (my $fh,"<$designfile") ) {
145: while (<$fh>) {
146: next if /^\#/;
147: chomp;
148: my ($key,$val)=(split(/\=/,$_));
149: if ($val) { $designhash{$domain.'.'.$key}=$val; }
150: }
151: close($fh);
152: }
153: }
154:
155: }
156: closedir(DIR);
157:
158:
159: # ------------------------------------------------------------- file categories
160: {
161: my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
162: '/filecategories.tab';
163: if ( open (my $fh,"<$categoryfile") ) {
164: while (<$fh>) {
165: next if /^\#/;
166: chomp;
167: my ($extension,$category)=(split(/\s+/,$_,2));
168: push @{$category_extensions{lc($category)}},$extension;
169: }
170: close($fh);
171: }
172:
173: }
174: # ------------------------------------------------------------------ file types
175: {
176: my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
177: '/filetypes.tab';
178: if ( open (my $fh,"<$typesfile") ) {
179: while (<$fh>) {
180: next if (/^\#/);
181: chomp;
182: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
183: if ($descr ne '') {
184: $fe{$ending}=lc($emb);
185: $fd{$ending}=$descr;
186: }
187: }
188: close($fh);
189: }
190: }
191: &Apache::lonnet::logthis(
192: "<font color=yellow>INFO: Read file types</font>");
193: $readit=1;
194: } # end of unless($readit)
195:
196: }
197:
198: ###############################################################
199: ## HTML and Javascript Helper Functions ##
200: ###############################################################
201:
202: =pod
203:
204: =head1 HTML and Javascript Functions
205:
206: =over 4
207:
208: =item * browser_and_searcher_javascript ()
209:
210: X<browsing, javascript>X<searching, javascript>Returns a string
211: containing javascript with two functions, C<openbrowser> and
212: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
213: tags.
214:
215: =item * openbrowser(formname,elementname,only,omit) [javascript]
216:
217: inputs: formname, elementname, only, omit
218:
219: formname and elementname indicate the name of the html form and name of
220: the element that the results of the browsing selection are to be placed in.
221:
222: Specifying 'only' will restrict the browser to displaying only files
223: with the given extension. Can be a comma seperated list.
224:
225: Specifying 'omit' will restrict the browser to NOT displaying files
226: with the given extension. Can be a comma seperated list.
227:
228: =item * opensearcher(formname, elementname) [javascript]
229:
230: Inputs: formname, elementname
231:
232: formname and elementname specify the name of the html form and the name
233: of the element the selection from the search results will be placed in.
234:
235: =cut
236:
237: sub browser_and_searcher_javascript {
238: return <<END;
239: var editbrowser = null;
240: function openbrowser(formname,elementname,only,omit,titleelement) {
241: var url = '/res/?';
242: if (editbrowser == null) {
243: url += 'launch=1&';
244: }
245: url += 'catalogmode=interactive&';
246: url += 'mode=edit&';
247: url += 'form=' + formname + '&';
248: if (only != null) {
249: url += 'only=' + only + '&';
250: }
251: if (omit != null) {
252: url += 'omit=' + omit + '&';
253: }
254: if (titleelement != null) {
255: url += 'titleelement=' + titleelement + '&';
256: }
257: url += 'element=' + elementname + '';
258: var title = 'Browser';
259: var options = 'scrollbars=1,resizable=1,menubar=0';
260: options += ',width=700,height=600';
261: editbrowser = open(url,title,options,'1');
262: editbrowser.focus();
263: }
264: var editsearcher;
265: function opensearcher(formname,elementname,titleelement) {
266: var url = '/adm/searchcat?';
267: if (editsearcher == null) {
268: url += 'launch=1&';
269: }
270: url += 'catalogmode=interactive&';
271: url += 'mode=edit&';
272: url += 'form=' + formname + '&';
273: if (titleelement != null) {
274: url += 'titleelement=' + titleelement + '&';
275: }
276: url += 'element=' + elementname + '';
277: var title = 'Search';
278: var options = 'scrollbars=1,resizable=1,menubar=0';
279: options += ',width=700,height=600';
280: editsearcher = open(url,title,options,'1');
281: editsearcher.focus();
282: }
283: END
284: }
285:
286: sub studentbrowser_javascript {
287: unless (
288: (($ENV{'request.course.id'}) &&
289: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
290: || ($ENV{'request.role'}=~/^(au|dc|su)/)
291: ) { return ''; }
292: return (<<'ENDSTDBRW');
293: <script type="text/javascript" language="Javascript" >
294: var stdeditbrowser;
295: function openstdbrowser(formname,uname,udom,roleflag) {
296: var url = '/adm/pickstudent?';
297: var filter;
298: eval('filter=document.'+formname+'.'+uname+'.value;');
299: if (filter != null) {
300: if (filter != '') {
301: url += 'filter='+filter+'&';
302: }
303: }
304: url += 'form=' + formname + '&unameelement='+uname+
305: '&udomelement='+udom;
306: if (roleflag) { url+="&roles=1"; }
307: var title = 'Student_Browser';
308: var options = 'scrollbars=1,resizable=1,menubar=0';
309: options += ',width=700,height=600';
310: stdeditbrowser = open(url,title,options,'1');
311: stdeditbrowser.focus();
312: }
313: </script>
314: ENDSTDBRW
315: }
316:
317: sub selectstudent_link {
318: my ($form,$unameele,$udomele)=@_;
319: if ($ENV{'request.course.id'}) {
320: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
321: return '';
322: }
323: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
324: '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
325: }
326: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
327: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
328: '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
329: }
330: return '';
331: }
332:
333: sub coursebrowser_javascript {
334: my ($domainfilter)=@_;
335: return (<<ENDSTDBRW);
336: <script type="text/javascript" language="Javascript" >
337: var stdeditbrowser;
338: function opencrsbrowser(formname,uname,udom) {
339: var url = '/adm/pickcourse?';
340: var filter;
341: if (filter != null) {
342: if (filter != '') {
343: url += 'filter='+filter+'&';
344: }
345: }
346: var domainfilter='$domainfilter';
347: if (domainfilter != null) {
348: if (domainfilter != '') {
349: url += 'domainfilter='+domainfilter+'&';
350: }
351: }
352: url += 'form=' + formname + '&cnumelement='+uname+
353: '&cdomelement='+udom;
354: var title = 'Course_Browser';
355: var options = 'scrollbars=1,resizable=1,menubar=0';
356: options += ',width=700,height=600';
357: stdeditbrowser = open(url,title,options,'1');
358: stdeditbrowser.focus();
359: }
360: </script>
361: ENDSTDBRW
362: }
363:
364: sub selectcourse_link {
365: my ($form,$unameele,$udomele)=@_;
366: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
367: '","'.$udomele.'");'."'>".&mt('Select Course')."</a>";
368: }
369:
370: =pod
371:
372: =item * linked_select_forms(...)
373:
374: linked_select_forms returns a string containing a <script></script> block
375: and html for two <select> menus. The select menus will be linked in that
376: changing the value of the first menu will result in new values being placed
377: in the second menu. The values in the select menu will appear in alphabetical
378: order.
379:
380: linked_select_forms takes the following ordered inputs:
381:
382: =over 4
383:
384: =item * $formname, the name of the <form> tag
385:
386: =item * $middletext, the text which appears between the <select> tags
387:
388: =item * $firstdefault, the default value for the first menu
389:
390: =item * $firstselectname, the name of the first <select> tag
391:
392: =item * $secondselectname, the name of the second <select> tag
393:
394: =item * $hashref, a reference to a hash containing the data for the menus.
395:
396: =back
397:
398: Below is an example of such a hash. Only the 'text', 'default', and
399: 'select2' keys must appear as stated. keys(%menu) are the possible
400: values for the first select menu. The text that coincides with the
401: first menu value is given in $menu{$choice1}->{'text'}. The values
402: and text for the second menu are given in the hash pointed to by
403: $menu{$choice1}->{'select2'}.
404:
405: my %menu = ( A1 => { text =>"Choice A1" ,
406: default => "B3",
407: select2 => {
408: B1 => "Choice B1",
409: B2 => "Choice B2",
410: B3 => "Choice B3",
411: B4 => "Choice B4"
412: }
413: },
414: A2 => { text =>"Choice A2" ,
415: default => "C2",
416: select2 => {
417: C1 => "Choice C1",
418: C2 => "Choice C2",
419: C3 => "Choice C3"
420: }
421: },
422: A3 => { text =>"Choice A3" ,
423: default => "D6",
424: select2 => {
425: D1 => "Choice D1",
426: D2 => "Choice D2",
427: D3 => "Choice D3",
428: D4 => "Choice D4",
429: D5 => "Choice D5",
430: D6 => "Choice D6",
431: D7 => "Choice D7"
432: }
433: }
434: );
435:
436: =cut
437:
438: sub linked_select_forms {
439: my ($formname,
440: $middletext,
441: $firstdefault,
442: $firstselectname,
443: $secondselectname,
444: $hashref
445: ) = @_;
446: my $second = "document.$formname.$secondselectname";
447: my $first = "document.$formname.$firstselectname";
448: # output the javascript to do the changing
449: my $result = '';
450: $result.="<script>\n";
451: $result.="var select2data = new Object();\n";
452: $" = '","';
453: my $debug = '';
454: foreach my $s1 (sort(keys(%$hashref))) {
455: $result.="select2data.d_$s1 = new Object();\n";
456: $result.="select2data.d_$s1.def = new String('".
457: $hashref->{$s1}->{'default'}."');\n";
458: $result.="select2data.d_$s1.values = new Array(";
459: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
460: $result.="\"@s2values\");\n";
461: $result.="select2data.d_$s1.texts = new Array(";
462: my @s2texts;
463: foreach my $value (@s2values) {
464: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
465: }
466: $result.="\"@s2texts\");\n";
467: }
468: $"=' ';
469: $result.= <<"END";
470:
471: function select1_changed() {
472: // Determine new choice
473: var newvalue = "d_" + $first.value;
474: // update select2
475: var values = select2data[newvalue].values;
476: var texts = select2data[newvalue].texts;
477: var select2def = select2data[newvalue].def;
478: var i;
479: // out with the old
480: for (i = 0; i < $second.options.length; i++) {
481: $second.options[i] = null;
482: }
483: // in with the nuclear
484: for (i=0;i<values.length; i++) {
485: $second.options[i] = new Option(values[i]);
486: $second.options[i].value = values[i];
487: $second.options[i].text = texts[i];
488: if (values[i] == select2def) {
489: $second.options[i].selected = true;
490: }
491: }
492: }
493: </script>
494: END
495: # output the initial values for the selection lists
496: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
497: foreach my $value (sort(keys(%$hashref))) {
498: $result.=" <option value=\"$value\" ";
499: $result.=" selected=\"true\" " if ($value eq $firstdefault);
500: $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
501: }
502: $result .= "</select>\n";
503: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
504: $result .= $middletext;
505: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
506: my $seconddefault = $hashref->{$firstdefault}->{'default'};
507: foreach my $value (sort(keys(%select2))) {
508: $result.=" <option value=\"$value\" ";
509: $result.=" selected=\"true\" " if ($value eq $seconddefault);
510: $result.=">".&mt($select2{$value})."</option>\n";
511: }
512: $result .= "</select>\n";
513: # return $debug;
514: return $result;
515: } # end of sub linked_select_forms {
516:
517: =pod
518:
519: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
520:
521: Returns a string corresponding to an HTML link to the given help
522: $topic, where $topic corresponds to the name of a .tex file in
523: /home/httpd/html/adm/help/tex, with underscores replaced by
524: spaces.
525:
526: $text will optionally be linked to the same topic, allowing you to
527: link text in addition to the graphic. If you do not want to link
528: text, but wish to specify one of the later parameters, pass an
529: empty string.
530:
531: $stayOnPage is a value that will be interpreted as a boolean. If true,
532: the link will not open a new window. If false, the link will open
533: a new window using Javascript. (Default is false.)
534:
535: $width and $height are optional numerical parameters that will
536: override the width and height of the popped up window, which may
537: be useful for certain help topics with big pictures included.
538:
539: =cut
540:
541: sub help_open_topic {
542: my ($topic, $text, $stayOnPage, $width, $height) = @_;
543: $text = "" if (not defined $text);
544: $stayOnPage = 0 if (not defined $stayOnPage);
545: if ($ENV{'browser.interface'} eq 'textual' ||
546: $ENV{'environment.remote'} eq 'off' ) {
547: $stayOnPage=1;
548: }
549: $width = 350 if (not defined $width);
550: $height = 400 if (not defined $height);
551: my $filename = $topic;
552: $filename =~ s/ /_/g;
553:
554: my $template = "";
555: my $link;
556:
557: if (!$stayOnPage)
558: {
559: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
560: }
561: else
562: {
563: $link = "/adm/help/${filename}.hlp";
564: }
565:
566: # Add the text
567: if ($text ne "")
568: {
569: $template .=
570: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
571: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
572: }
573:
574: # Add the graphic
575: $template .= <<"ENDTEMPLATE";
576: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
577: ENDTEMPLATE
578: if ($text ne '') { $template.='</td></tr></table>' };
579: return $template;
580:
581: }
582:
583: # This is a quicky function for Latex cheatsheet editing, since it
584: # appears in at least four places
585: sub helpLatexCheatsheet {
586: my $other = shift;
587: my $addOther = '';
588: if ($other) {
589: $addOther = Apache::loncommon::help_open_topic($other, shift,
590: undef, undef, 600) .
591: '</td><td>';
592: }
593: return '<table><tr><td>'.
594: $addOther .
595: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
596: undef,undef,600)
597: .'</td><td>'.
598: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
599: undef,undef,600)
600: .'</td></tr></table>';
601: }
602:
603: =pod
604:
605: =item * csv_translate($text)
606:
607: Translate $text to allow it to be output as a 'comma seperated values'
608: format.
609:
610: =cut
611:
612: sub csv_translate {
613: my $text = shift;
614: $text =~ s/\"/\"\"/g;
615: $text =~ s/\n//g;
616: return $text;
617: }
618:
619: =pod
620:
621: =item * change_content_javascript():
622:
623: This and the next function allow you to create small sections of an
624: otherwise static HTML page that you can update on the fly with
625: Javascript, even in Netscape 4.
626:
627: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
628: must be written to the HTML page once. It will prove the Javascript
629: function "change(name, content)". Calling the change function with the
630: name of the section
631: you want to update, matching the name passed to C<changable_area>, and
632: the new content you want to put in there, will put the content into
633: that area.
634:
635: B<Note>: Netscape 4 only reserves enough space for the changable area
636: to contain room for the original contents. You need to "make space"
637: for whatever changes you wish to make, and be B<sure> to check your
638: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
639: it's adequate for updating a one-line status display, but little more.
640: This script will set the space to 100% width, so you only need to
641: worry about height in Netscape 4.
642:
643: Modern browsers are much less limiting, and if you can commit to the
644: user not using Netscape 4, this feature may be used freely with
645: pretty much any HTML.
646:
647: =cut
648:
649: sub change_content_javascript {
650: # If we're on Netscape 4, we need to use Layer-based code
651: if ($ENV{'browser.type'} eq 'netscape' &&
652: $ENV{'browser.version'} =~ /^4\./) {
653: return (<<NETSCAPE4);
654: function change(name, content) {
655: doc = document.layers[name+"___escape"].layers[0].document;
656: doc.open();
657: doc.write(content);
658: doc.close();
659: }
660: NETSCAPE4
661: } else {
662: # Otherwise, we need to use semi-standards-compliant code
663: # (technically, "innerHTML" isn't standard but the equivalent
664: # is really scary, and every useful browser supports it
665: return (<<DOMBASED);
666: function change(name, content) {
667: element = document.getElementById(name);
668: element.innerHTML = content;
669: }
670: DOMBASED
671: }
672: }
673:
674: =pod
675:
676: =item * changable_area($name, $origContent):
677:
678: This provides a "changable area" that can be modified on the fly via
679: the Javascript code provided in C<change_content_javascript>. $name is
680: the name you will use to reference the area later; do not repeat the
681: same name on a given HTML page more then once. $origContent is what
682: the area will originally contain, which can be left blank.
683:
684: =cut
685:
686: sub changable_area {
687: my ($name, $origContent) = @_;
688:
689: if ($ENV{'browser.type'} eq 'netscape' &&
690: $ENV{'browser.version'} =~ /^4\./) {
691: # If this is netscape 4, we need to use the Layer tag
692: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
693: } else {
694: return "<span id='$name'>$origContent</span>";
695: }
696: }
697:
698: =pod
699:
700: =back
701:
702: =cut
703:
704: ###############################################################
705: ## Home server <option> list generating code ##
706: ###############################################################
707:
708: =pod
709:
710: =head1 Home Server option list generating code
711:
712: =over 4
713:
714: =item * get_domains()
715:
716: Returns an array containing each of the domains listed in the hosts.tab
717: file.
718:
719: =cut
720:
721: #-------------------------------------------
722: sub get_domains {
723: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
724: my @domains;
725: my %seen;
726: foreach (sort values(%Apache::lonnet::hostdom)) {
727: push (@domains,$_) unless $seen{$_}++;
728: }
729: return @domains;
730: }
731:
732: #-------------------------------------------
733:
734: =pod
735:
736: =item * select_form($defdom,$name,%hash)
737:
738: Returns a string containing a <select name='$name' size='1'> form to
739: allow a user to select options from a hash option_name => displayed text.
740: See lonrights.pm for an example invocation and use.
741:
742: =cut
743:
744: #-------------------------------------------
745: sub select_form {
746: my ($def,$name,%hash) = @_;
747: my $selectform = "<select name=\"$name\" size=\"1\">\n";
748: my @keys;
749: if (exists($hash{'select_form_order'})) {
750: @keys=@{$hash{'select_form_order'}};
751: } else {
752: @keys=sort(keys(%hash));
753: }
754: foreach (@keys) {
755: $selectform.="<option value=\"$_\" ".
756: ($_ eq $def ? 'selected' : '').
757: ">".&mt($hash{$_})."</option>\n";
758: }
759: $selectform.="</select>";
760: return $selectform;
761: }
762:
763:
764: #-------------------------------------------
765:
766: =pod
767:
768: =item * select_dom_form($defdom,$name,$includeempty)
769:
770: Returns a string containing a <select name='$name' size='1'> form to
771: allow a user to select the domain to preform an operation in.
772: See loncreateuser.pm for an example invocation and use.
773:
774: If the $includeempty flag is set, it also includes an empty choice ("no domain
775: selected");
776:
777: =cut
778:
779: #-------------------------------------------
780: sub select_dom_form {
781: my ($defdom,$name,$includeempty) = @_;
782: my @domains = get_domains();
783: if ($includeempty) { @domains=('',@domains); }
784: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
785: foreach (@domains) {
786: $selectdomain.="<option value=\"$_\" ".
787: ($_ eq $defdom ? 'selected' : '').
788: ">$_</option>\n";
789: }
790: $selectdomain.="</select>";
791: return $selectdomain;
792: }
793:
794: #-------------------------------------------
795:
796: =pod
797:
798: =item * get_library_servers($domain)
799:
800: Returns a hash which contains keys like '103l3' and values like
801: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
802: given $domain.
803:
804: =cut
805:
806: #-------------------------------------------
807: sub get_library_servers {
808: my $domain = shift;
809: my %library_servers;
810: foreach (keys(%Apache::lonnet::libserv)) {
811: if ($Apache::lonnet::hostdom{$_} eq $domain) {
812: $library_servers{$_} = $Apache::lonnet::hostname{$_};
813: }
814: }
815: return %library_servers;
816: }
817:
818: #-------------------------------------------
819:
820: =pod
821:
822: =item * home_server_option_list($domain)
823:
824: returns a string which contains an <option> list to be used in a
825: <select> form input. See loncreateuser.pm for an example.
826:
827: =cut
828:
829: #-------------------------------------------
830: sub home_server_option_list {
831: my $domain = shift;
832: my %servers = &get_library_servers($domain);
833: my $result = '';
834: foreach (sort keys(%servers)) {
835: $result.=
836: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
837: }
838: return $result;
839: }
840:
841: =pod
842:
843: =back
844:
845: =cut
846:
847: ###############################################################
848: ## Decoding User Agent ##
849: ###############################################################
850:
851: =pod
852:
853: =head1 Decoding the User Agent
854:
855: =over 4
856:
857: =item * &decode_user_agent()
858:
859: Inputs: $r
860:
861: Outputs:
862:
863: =over 4
864:
865: =item * $httpbrowser
866:
867: =item * $clientbrowser
868:
869: =item * $clientversion
870:
871: =item * $clientmathml
872:
873: =item * $clientunicode
874:
875: =item * $clientos
876:
877: =back
878:
879: =back
880:
881: =cut
882:
883: ###############################################################
884: ###############################################################
885: sub decode_user_agent {
886: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
887: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
888: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
889: my $clientbrowser='unknown';
890: my $clientversion='0';
891: my $clientmathml='';
892: my $clientunicode='0';
893: for (my $i=0;$i<=$#browsertype;$i++) {
894: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
895: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
896: $clientbrowser=$bname;
897: $httpbrowser=~/$vreg/i;
898: $clientversion=$1;
899: $clientmathml=($clientversion>=$minv);
900: $clientunicode=($clientversion>=$univ);
901: }
902: }
903: my $clientos='unknown';
904: if (($httpbrowser=~/linux/i) ||
905: ($httpbrowser=~/unix/i) ||
906: ($httpbrowser=~/ux/i) ||
907: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
908: if (($httpbrowser=~/vax/i) ||
909: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
910: if ($httpbrowser=~/next/i) { $clientos='next'; }
911: if (($httpbrowser=~/mac/i) ||
912: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
913: if ($httpbrowser=~/win/i) { $clientos='win'; }
914: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
915: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
916: $clientunicode,$clientos,);
917: }
918:
919: ###############################################################
920: ## Authentication changing form generation subroutines ##
921: ###############################################################
922: ##
923: ## All of the authform_xxxxxxx subroutines take their inputs in a
924: ## hash, and have reasonable default values.
925: ##
926: ## formname = the name given in the <form> tag.
927: #-------------------------------------------
928:
929: =pod
930:
931: =head1 Authentication Routines
932:
933: =over 4
934:
935: =item * authform_xxxxxx
936:
937: The authform_xxxxxx subroutines provide javascript and html forms which
938: handle some of the conveniences required for authentication forms.
939: This is not an optimal method, but it works.
940:
941: See loncreateuser.pm for invocation and use examples.
942:
943: =over 4
944:
945: =item * authform_header
946:
947: =item * authform_authorwarning
948:
949: =item * authform_nochange
950:
951: =item * authform_kerberos
952:
953: =item * authform_internal
954:
955: =item * authform_filesystem
956:
957: =back
958:
959: =back
960:
961: =cut
962:
963: #-------------------------------------------
964: sub authform_header{
965: my %in = (
966: formname => 'cu',
967: kerb_def_dom => '',
968: @_,
969: );
970: $in{'formname'} = 'document.' . $in{'formname'};
971: my $result='';
972:
973: #---------------------------------------------- Code for upper case translation
974: my $Javascript_toUpperCase;
975: unless ($in{kerb_def_dom}) {
976: $Javascript_toUpperCase =<<"END";
977: switch (choice) {
978: case 'krb': currentform.elements[choicearg].value =
979: currentform.elements[choicearg].value.toUpperCase();
980: break;
981: default:
982: }
983: END
984: } else {
985: $Javascript_toUpperCase = "";
986: }
987:
988: $result.=<<"END";
989: var current = new Object();
990: current.radiovalue = 'nochange';
991: current.argfield = null;
992:
993: function changed_radio(choice,currentform) {
994: var choicearg = choice + 'arg';
995: // If a radio button in changed, we need to change the argfield
996: if (current.radiovalue != choice) {
997: current.radiovalue = choice;
998: if (current.argfield != null) {
999: currentform.elements[current.argfield].value = '';
1000: }
1001: if (choice == 'nochange') {
1002: current.argfield = null;
1003: } else {
1004: current.argfield = choicearg;
1005: switch(choice) {
1006: case 'krb':
1007: currentform.elements[current.argfield].value =
1008: "$in{'kerb_def_dom'}";
1009: break;
1010: default:
1011: break;
1012: }
1013: }
1014: }
1015: return;
1016: }
1017:
1018: function changed_text(choice,currentform) {
1019: var choicearg = choice + 'arg';
1020: if (currentform.elements[choicearg].value !='') {
1021: $Javascript_toUpperCase
1022: // clear old field
1023: if ((current.argfield != choicearg) && (current.argfield != null)) {
1024: currentform.elements[current.argfield].value = '';
1025: }
1026: current.argfield = choicearg;
1027: }
1028: set_auth_radio_buttons(choice,currentform);
1029: return;
1030: }
1031:
1032: function set_auth_radio_buttons(newvalue,currentform) {
1033: var i=0;
1034: while (i < currentform.login.length) {
1035: if (currentform.login[i].value == newvalue) { break; }
1036: i++;
1037: }
1038: if (i == currentform.login.length) {
1039: return;
1040: }
1041: current.radiovalue = newvalue;
1042: currentform.login[i].checked = true;
1043: return;
1044: }
1045: END
1046: return $result;
1047: }
1048:
1049: sub authform_authorwarning{
1050: my $result='';
1051: $result='<i>'.
1052: &mt('As a general rule, only authors or co-authors should be '.
1053: 'filesystem authenticated '.
1054: '(which allows access to the server filesystem).')."</i>\n";
1055: return $result;
1056: }
1057:
1058: sub authform_nochange{
1059: my %in = (
1060: formname => 'document.cu',
1061: kerb_def_dom => 'MSU.EDU',
1062: @_,
1063: );
1064: my $result = &mt('[_1] Do not change login data',
1065: '<input type="radio" name="login" value="nochange" '.
1066: 'checked="checked" onclick="'.
1067: "javascript:changed_radio('nochange',$in{'formname'});".'" />');
1068: return $result;
1069: }
1070:
1071: sub authform_kerberos{
1072: my %in = (
1073: formname => 'document.cu',
1074: kerb_def_dom => 'MSU.EDU',
1075: kerb_def_auth => 'krb4',
1076: @_,
1077: );
1078: my ($check4,$check5);
1079: if ($in{'kerb_def_auth'} eq 'krb5') {
1080: $check5 = " checked=\"on\"";
1081: } else {
1082: $check4 = " checked=\"on\"";
1083: }
1084: my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
1085: my $result .= &mt
1086: ('[_1] Kerberos authenticated with domain [_2] '.
1087: '[_3] Version 4 [_4] Version 5',
1088: '<input type="radio" name="login" value="krb" '.
1089: 'onclick="'.$jscall.'" onchange="'.$jscall.'" />',
1090: '<input type="text" size="10" name="krbarg" '.
1091: 'value="'.$in{'kerb_def_dom'}.'" '.
1092: 'onchange="'.$jscall.'" />',
1093: '<input type="radio" name="krbver" value="4" '.$check4.' />',
1094: '<input type="radio" name="krbver" value="5" '.$check5.' />');
1095: return $result;
1096: }
1097:
1098: sub authform_internal{
1099: my %args = (
1100: formname => 'document.cu',
1101: kerb_def_dom => 'MSU.EDU',
1102: @_,
1103: );
1104: my $jscall = "javascript:changed_radio('int',$args{'formname'});";
1105: my $result.=&mt
1106: ('[_1] Internally authenticated (with initial password [_2])',
1107: '<input type="radio" name="login" value="int" '.
1108: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1109: '<input type="text" size="10" name="intarg" value="" '.
1110: 'onchange="'.$jscall.'" />');
1111: return $result;
1112: }
1113:
1114: sub authform_local{
1115: my %in = (
1116: formname => 'document.cu',
1117: kerb_def_dom => 'MSU.EDU',
1118: @_,
1119: );
1120: my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
1121: my $result.=&mt('[_1] Local Authentication with arguement [_2]',
1122: '<input type="radio" name="login" value="loc" '.
1123: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1124: '<input type="text" size="10" name="locarg" value="" '.
1125: 'onchange="'.$jscall.'" />');
1126: return $result;
1127: }
1128:
1129: sub authform_filesystem{
1130: my %in = (
1131: formname => 'document.cu',
1132: kerb_def_dom => 'MSU.EDU',
1133: @_,
1134: );
1135: my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
1136: my $result.= &mt
1137: ('[_1] Filesystem Authenticated (with initial password [_2])',
1138: '<input type="radio" name="login" value="fsys" '.
1139: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1140: '<input type="text" size="10" name="fsysarg" value="" '.
1141: 'onchange="'.$jscall.'" />');
1142: return $result;
1143: }
1144:
1145: ###############################################################
1146: ## Get Authentication Defaults for Domain ##
1147: ###############################################################
1148:
1149: =pod
1150:
1151: =head1 Domains and Authentication
1152:
1153: Returns default authentication type and an associated argument as
1154: listed in file 'domain.tab'.
1155:
1156: =over 4
1157:
1158: =item * get_auth_defaults
1159:
1160: get_auth_defaults($target_domain) returns the default authentication
1161: type and an associated argument (initial password or a kerberos domain).
1162: These values are stored in lonTabs/domain.tab
1163:
1164: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1165:
1166: If target_domain is not found in domain.tab, returns nothing ('').
1167:
1168: =cut
1169:
1170: #-------------------------------------------
1171: sub get_auth_defaults {
1172: my $domain=shift;
1173: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1174: }
1175: ###############################################################
1176: ## End Get Authentication Defaults for Domain ##
1177: ###############################################################
1178:
1179: ###############################################################
1180: ## Get Kerberos Defaults for Domain ##
1181: ###############################################################
1182: ##
1183: ## Returns default kerberos version and an associated argument
1184: ## as listed in file domain.tab. If not listed, provides
1185: ## appropriate default domain and kerberos version.
1186: ##
1187: #-------------------------------------------
1188:
1189: =pod
1190:
1191: =item * get_kerberos_defaults
1192:
1193: get_kerberos_defaults($target_domain) returns the default kerberos
1194: version and domain. If not found in domain.tabs, it defaults to
1195: version 4 and the domain of the server.
1196:
1197: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1198:
1199: =cut
1200:
1201: #-------------------------------------------
1202: sub get_kerberos_defaults {
1203: my $domain=shift;
1204: my ($krbdef,$krbdefdom) =
1205: &Apache::loncommon::get_auth_defaults($domain);
1206: unless ($krbdef =~/^krb/ && $krbdefdom) {
1207: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1208: my $krbdefdom=$1;
1209: $krbdefdom=~tr/a-z/A-Z/;
1210: $krbdef = "krb4";
1211: }
1212: return ($krbdef,$krbdefdom);
1213: }
1214:
1215: =pod
1216:
1217: =back
1218:
1219: =cut
1220:
1221: ###############################################################
1222: ## Thesaurus Functions ##
1223: ###############################################################
1224:
1225: =pod
1226:
1227: =head1 Thesaurus Functions
1228:
1229: =over 4
1230:
1231: =item * initialize_keywords
1232:
1233: Initializes the package variable %Keywords if it is empty. Uses the
1234: package variable $thesaurus_db_file.
1235:
1236: =cut
1237:
1238: ###################################################
1239:
1240: sub initialize_keywords {
1241: return 1 if (scalar keys(%Keywords));
1242: # If we are here, %Keywords is empty, so fill it up
1243: # Make sure the file we need exists...
1244: if (! -e $thesaurus_db_file) {
1245: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1246: " failed because it does not exist");
1247: return 0;
1248: }
1249: # Set up the hash as a database
1250: my %thesaurus_db;
1251: if (! tie(%thesaurus_db,'GDBM_File',
1252: $thesaurus_db_file,&GDBM_READER(),0640)){
1253: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1254: $thesaurus_db_file);
1255: return 0;
1256: }
1257: # Get the average number of appearances of a word.
1258: my $avecount = $thesaurus_db{'average.count'};
1259: # Put keywords (those that appear > average) into %Keywords
1260: while (my ($word,$data)=each (%thesaurus_db)) {
1261: my ($count,undef) = split /:/,$data;
1262: $Keywords{$word}++ if ($count > $avecount);
1263: }
1264: untie %thesaurus_db;
1265: # Remove special values from %Keywords.
1266: foreach ('total.count','average.count') {
1267: delete($Keywords{$_}) if (exists($Keywords{$_}));
1268: }
1269: return 1;
1270: }
1271:
1272: ###################################################
1273:
1274: =pod
1275:
1276: =item * keyword($word)
1277:
1278: Returns true if $word is a keyword. A keyword is a word that appears more
1279: than the average number of times in the thesaurus database. Calls
1280: &initialize_keywords
1281:
1282: =cut
1283:
1284: ###################################################
1285:
1286: sub keyword {
1287: return if (!&initialize_keywords());
1288: my $word=lc(shift());
1289: $word=~s/\W//g;
1290: return exists($Keywords{$word});
1291: }
1292:
1293: ###############################################################
1294:
1295: =pod
1296:
1297: =item * get_related_words
1298:
1299: Look up a word in the thesaurus. Takes a scalar arguement and returns
1300: an array of words. If the keyword is not in the thesaurus, an empty array
1301: will be returned. The order of the words returned is determined by the
1302: database which holds them.
1303:
1304: Uses global $thesaurus_db_file.
1305:
1306: =cut
1307:
1308: ###############################################################
1309: sub get_related_words {
1310: my $keyword = shift;
1311: my %thesaurus_db;
1312: if (! -e $thesaurus_db_file) {
1313: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1314: "failed because the file does not exist");
1315: return ();
1316: }
1317: if (! tie(%thesaurus_db,'GDBM_File',
1318: $thesaurus_db_file,&GDBM_READER(),0640)){
1319: return ();
1320: }
1321: my @Words=();
1322: if (exists($thesaurus_db{$keyword})) {
1323: $_ = $thesaurus_db{$keyword};
1324: (undef,@Words) = split/:/; # The first element is the number of times
1325: # the word appears. We do not need it now.
1326: for (my $i=0;$i<=$#Words;$i++) {
1327: ($Words[$i],undef)= split/\,/,$Words[$i];
1328: }
1329: }
1330: untie %thesaurus_db;
1331: return @Words;
1332: }
1333:
1334: =pod
1335:
1336: =back
1337:
1338: =cut
1339:
1340: # -------------------------------------------------------------- Plaintext name
1341: =pod
1342:
1343: =head1 User Name Functions
1344:
1345: =over 4
1346:
1347: =item * plainname($uname,$udom)
1348:
1349: Takes a users logon name and returns it as a string in
1350: "first middle last generation" form
1351:
1352: =cut
1353:
1354: ###############################################################
1355: sub plainname {
1356: my ($uname,$udom)=@_;
1357: my %names=&Apache::lonnet::get('environment',
1358: ['firstname','middlename','lastname','generation'],
1359: $udom,$uname);
1360: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1361: $names{'lastname'}.' '.$names{'generation'};
1362: $name=~s/\s+$//;
1363: $name=~s/\s+/ /g;
1364: return $name;
1365: }
1366:
1367: # -------------------------------------------------------------------- Nickname
1368: =pod
1369:
1370: =item * nickname($uname,$udom)
1371:
1372: Gets a users name and returns it as a string as
1373:
1374: ""nickname""
1375:
1376: if the user has a nickname or
1377:
1378: "first middle last generation"
1379:
1380: if the user does not
1381:
1382: =cut
1383:
1384: sub nickname {
1385: my ($uname,$udom)=@_;
1386: my %names=&Apache::lonnet::get('environment',
1387: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1388: my $name=$names{'nickname'};
1389: if ($name) {
1390: $name='"'.$name.'"';
1391: } else {
1392: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1393: $names{'lastname'}.' '.$names{'generation'};
1394: $name=~s/\s+$//;
1395: $name=~s/\s+/ /g;
1396: }
1397: return $name;
1398: }
1399:
1400:
1401: # ------------------------------------------------------------------ Screenname
1402:
1403: =pod
1404:
1405: =item * screenname($uname,$udom)
1406:
1407: Gets a users screenname and returns it as a string
1408:
1409: =cut
1410:
1411: sub screenname {
1412: my ($uname,$udom)=@_;
1413: my %names=
1414: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1415: return $names{'screenname'};
1416: }
1417:
1418: # ------------------------------------------------------------- Message Wrapper
1419:
1420: sub messagewrapper {
1421: my ($link,$un,$do)=@_;
1422: return
1423: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1424: }
1425: # --------------------------------------------------------------- Notes Wrapper
1426:
1427: sub noteswrapper {
1428: my ($link,$un,$do)=@_;
1429: return
1430: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1431: }
1432: # ------------------------------------------------------------- Aboutme Wrapper
1433:
1434: sub aboutmewrapper {
1435: my ($link,$username,$domain)=@_;
1436: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1437: }
1438:
1439: # ------------------------------------------------------------ Syllabus Wrapper
1440:
1441:
1442: sub syllabuswrapper {
1443: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1444: if ($fontcolor) {
1445: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1446: }
1447: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1448: }
1449:
1450: =pod
1451:
1452: =back
1453:
1454: =head1 Access .tab File Data
1455:
1456: =over 4
1457:
1458: =item * languageids()
1459:
1460: returns list of all language ids
1461:
1462: =cut
1463:
1464: sub languageids {
1465: return sort(keys(%language));
1466: }
1467:
1468: =pod
1469:
1470: =item * languagedescription()
1471:
1472: returns description of a specified language id
1473:
1474: =cut
1475:
1476: sub languagedescription {
1477: my $code=shift;
1478: return ($supported_language{$code}?'* ':'').
1479: $language{$code}.
1480: ($supported_language{$code}?' ('.&mt('interface available').')':'');
1481: }
1482:
1483: sub plainlanguagedescription {
1484: my $code=shift;
1485: return $language{$code};
1486: }
1487:
1488: sub supportedlanguagecode {
1489: my $code=shift;
1490: return $supported_language{$code};
1491: }
1492:
1493: =pod
1494:
1495: =item * copyrightids()
1496:
1497: returns list of all copyrights
1498:
1499: =cut
1500:
1501: sub copyrightids {
1502: return sort(keys(%cprtag));
1503: }
1504:
1505: =pod
1506:
1507: =item * copyrightdescription()
1508:
1509: returns description of a specified copyright id
1510:
1511: =cut
1512:
1513: sub copyrightdescription {
1514: return $cprtag{shift(@_)};
1515: }
1516:
1517: =pod
1518:
1519: =item * filecategories()
1520:
1521: returns list of all file categories
1522:
1523: =cut
1524:
1525: sub filecategories {
1526: return sort(keys(%category_extensions));
1527: }
1528:
1529: =pod
1530:
1531: =item * filecategorytypes()
1532:
1533: returns list of file types belonging to a given file
1534: category
1535:
1536: =cut
1537:
1538: sub filecategorytypes {
1539: return @{$category_extensions{lc($_[0])}};
1540: }
1541:
1542: =pod
1543:
1544: =item * fileembstyle()
1545:
1546: returns embedding style for a specified file type
1547:
1548: =cut
1549:
1550: sub fileembstyle {
1551: return $fe{lc(shift(@_))};
1552: }
1553:
1554: =pod
1555:
1556: =item * filedescription()
1557:
1558: returns description for a specified file type
1559:
1560: =cut
1561:
1562: sub filedescription {
1563: return $fd{lc(shift(@_))};
1564: }
1565:
1566: =pod
1567:
1568: =item * filedescriptionex()
1569:
1570: returns description for a specified file type with
1571: extra formatting
1572:
1573: =cut
1574:
1575: sub filedescriptionex {
1576: my $ex=shift;
1577: return '.'.$ex.' '.$fd{lc($ex)};
1578: }
1579:
1580: # End of .tab access
1581: =pod
1582:
1583: =back
1584:
1585: =cut
1586:
1587: # ------------------------------------------------------------------ File Types
1588: sub fileextensions {
1589: return sort(keys(%fe));
1590: }
1591:
1592: # ----------------------------------------------------------- Display Languages
1593: # returns a hash with all desired display languages
1594: #
1595:
1596: sub display_languages {
1597: my %languages=();
1598: foreach (&preferred_languages()) {
1599: $languages{$_}=1;
1600: }
1601: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
1602: if ($ENV{'form.displaylanguage'}) {
1603: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
1604: $languages{$_}=1;
1605: }
1606: }
1607: return %languages;
1608: }
1609:
1610: sub preferred_languages {
1611: my @languages=();
1612: if ($ENV{'environment.languages'}) {
1613: @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
1614: }
1615: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
1616: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
1617: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
1618: }
1619: my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
1620: if ($browser) {
1621: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
1622: }
1623: if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
1624: @languages=(@languages,
1625: $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
1626: }
1627: if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
1628: @languages=(@languages,
1629: $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
1630: }
1631: if ($Apache::lonnet::domain_lang_def{
1632: $Apache::lonnet::perlvar{'lonDefDomain'}}) {
1633: @languages=(@languages,
1634: $Apache::lonnet::domain_lang_def{
1635: $Apache::lonnet::perlvar{'lonDefDomain'}});
1636: }
1637: # turn "en-ca" into "en-ca,en"
1638: my @genlanguages;
1639: foreach (@languages) {
1640: unless ($_=~/\w/) { next; }
1641: push (@genlanguages,$_);
1642: if ($_=~/(\-|\_)/) {
1643: push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
1644: }
1645: }
1646: return @genlanguages;
1647: }
1648:
1649: ###############################################################
1650: ## Student Answer Attempts ##
1651: ###############################################################
1652:
1653: =pod
1654:
1655: =head1 Alternate Problem Views
1656:
1657: =over 4
1658:
1659: =item * get_previous_attempt($symb, $username, $domain, $course,
1660: $getattempt, $regexp, $gradesub)
1661:
1662: Return string with previous attempt on problem. Arguments:
1663:
1664: =over 4
1665:
1666: =item * $symb: Problem, including path
1667:
1668: =item * $username: username of the desired student
1669:
1670: =item * $domain: domain of the desired student
1671:
1672: =item * $course: Course ID
1673:
1674: =item * $getattempt: Leave blank for all attempts, otherwise put
1675: something
1676:
1677: =item * $regexp: if string matches this regexp, the string will be
1678: sent to $gradesub
1679:
1680: =item * $gradesub: routine that processes the string if it matches $regexp
1681:
1682: =back
1683:
1684: The output string is a table containing all desired attempts, if any.
1685:
1686: =cut
1687:
1688: sub get_previous_attempt {
1689: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1690: my $prevattempts='';
1691: no strict 'refs';
1692: if ($symb) {
1693: my (%returnhash)=
1694: &Apache::lonnet::restore($symb,$course,$domain,$username);
1695: if ($returnhash{'version'}) {
1696: my %lasthash=();
1697: my $version;
1698: for ($version=1;$version<=$returnhash{'version'};$version++) {
1699: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1700: $lasthash{$_}=$returnhash{$version.':'.$_};
1701: }
1702: }
1703: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1704: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1705: foreach (sort(keys %lasthash)) {
1706: my ($ign,@parts) = split(/\./,$_);
1707: if ($#parts > 0) {
1708: my $data=$parts[-1];
1709: pop(@parts);
1710: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1711: } else {
1712: if ($#parts == 0) {
1713: $prevattempts.='<th>'.$parts[0].'</th>';
1714: } else {
1715: $prevattempts.='<th>'.$ign.'</th>';
1716: }
1717: }
1718: }
1719: if ($getattempt eq '') {
1720: for ($version=1;$version<=$returnhash{'version'};$version++) {
1721: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1722: foreach (sort(keys %lasthash)) {
1723: my $value;
1724: if ($_ =~ /timestamp/) {
1725: $value=scalar(localtime($returnhash{$version.':'.$_}));
1726: } else {
1727: $value=$returnhash{$version.':'.$_};
1728: }
1729: $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
1730: }
1731: }
1732: }
1733: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1734: foreach (sort(keys %lasthash)) {
1735: my $value;
1736: if ($_ =~ /timestamp/) {
1737: $value=scalar(localtime($lasthash{$_}));
1738: } else {
1739: $value=$lasthash{$_};
1740: }
1741: $value=&Apache::lonnet::unescape($value);
1742: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1743: $prevattempts.='<td>'.$value.' </td>';
1744: }
1745: $prevattempts.='</tr></table></td></tr></table>';
1746: } else {
1747: $prevattempts='Nothing submitted - no attempts.';
1748: }
1749: } else {
1750: $prevattempts='No data.';
1751: }
1752: }
1753:
1754: sub relative_to_absolute {
1755: my ($url,$output)=@_;
1756: my $parser=HTML::TokeParser->new(\$output);
1757: my $token;
1758: my $thisdir=$url;
1759: my @rlinks=();
1760: while ($token=$parser->get_token) {
1761: if ($token->[0] eq 'S') {
1762: if ($token->[1] eq 'a') {
1763: if ($token->[2]->{'href'}) {
1764: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
1765: }
1766: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
1767: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
1768: } elsif ($token->[1] eq 'base') {
1769: $thisdir=$token->[2]->{'href'};
1770: }
1771: }
1772: }
1773: $thisdir=~s-/[^/]*$--;
1774: foreach (@rlinks) {
1775: unless (($_=~/^http:\/\//i) ||
1776: ($_=~/^\//) ||
1777: ($_=~/^javascript:/i) ||
1778: ($_=~/^mailto:/i) ||
1779: ($_=~/^\#/)) {
1780: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
1781: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
1782: }
1783: }
1784: # -------------------------------------------------- Deal with Applet codebases
1785: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1786: return $output;
1787: }
1788:
1789: =pod
1790:
1791: =item * get_student_view
1792:
1793: show a snapshot of what student was looking at
1794:
1795: =cut
1796:
1797: sub get_student_view {
1798: my ($symb,$username,$domain,$courseid,$target) = @_;
1799: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1800: my (%old,%moreenv);
1801: my @elements=('symb','courseid','domain','username');
1802: foreach my $element (@elements) {
1803: $old{$element}=$ENV{'form.grade_'.$element};
1804: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1805: }
1806: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1807: &Apache::lonnet::appenv(%moreenv);
1808: $feedurl=&Apache::lonnet::clutter($feedurl);
1809: my $userview=&Apache::lonnet::ssi_body($feedurl);
1810: &Apache::lonnet::delenv('form.grade_');
1811: foreach my $element (@elements) {
1812: $ENV{'form.grade_'.$element}=$old{$element};
1813: }
1814: $userview=~s/\<body[^\>]*\>//gi;
1815: $userview=~s/\<\/body\>//gi;
1816: $userview=~s/\<html\>//gi;
1817: $userview=~s/\<\/html\>//gi;
1818: $userview=~s/\<head\>//gi;
1819: $userview=~s/\<\/head\>//gi;
1820: $userview=~s/action\s*\=/would_be_action\=/gi;
1821: $userview=&relative_to_absolute($feedurl,$userview);
1822: return $userview;
1823: }
1824:
1825: =pod
1826:
1827: =item * get_student_answers()
1828:
1829: show a snapshot of how student was answering problem
1830:
1831: =cut
1832:
1833: sub get_student_answers {
1834: my ($symb,$username,$domain,$courseid,%form) = @_;
1835: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
1836: my (%old,%moreenv);
1837: my @elements=('symb','courseid','domain','username');
1838: foreach my $element (@elements) {
1839: $old{$element}=$ENV{'form.grade_'.$element};
1840: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1841: }
1842: $moreenv{'form.grade_target'}='answer';
1843: &Apache::lonnet::appenv(%moreenv);
1844: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
1845: &Apache::lonnet::delenv('form.grade_');
1846: foreach my $element (@elements) {
1847: $ENV{'form.grade_'.$element}=$old{$element};
1848: }
1849: return $userview;
1850: }
1851:
1852: =pod
1853:
1854: =item * &submlink()
1855:
1856: Inputs: $text $uname $udom $symb
1857:
1858: Returns: A link to grades.pm such as to see the SUBM view of a student
1859:
1860: =cut
1861:
1862: ###############################################
1863: sub submlink {
1864: my ($text,$uname,$udom,$symb)=@_;
1865: if (!($uname && $udom)) {
1866: (my $cursymb, my $courseid,$udom,$uname)=
1867: &Apache::lonxml::whichuser($symb);
1868: if (!$symb) { $symb=$cursymb; }
1869: }
1870: if (!$symb) { $symb=&symbread(); }
1871: return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
1872: '&userdom='.$udom.'&command=submission">'.$text.'</a>';
1873: }
1874: ##############################################
1875:
1876: =pod
1877:
1878: =back
1879:
1880: =cut
1881:
1882: ###############################################
1883:
1884:
1885: sub timehash {
1886: my @ltime=localtime(shift);
1887: return ( 'seconds' => $ltime[0],
1888: 'minutes' => $ltime[1],
1889: 'hours' => $ltime[2],
1890: 'day' => $ltime[3],
1891: 'month' => $ltime[4]+1,
1892: 'year' => $ltime[5]+1900,
1893: 'weekday' => $ltime[6],
1894: 'dayyear' => $ltime[7]+1,
1895: 'dlsav' => $ltime[8] );
1896: }
1897:
1898: sub maketime {
1899: my %th=@_;
1900: return POSIX::mktime(
1901: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1902: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1903: }
1904:
1905:
1906: #########################################
1907: #
1908: # Retro-fixing of un-backward-compatible time format
1909:
1910: sub unsqltime {
1911: my $timestamp=shift;
1912: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1913: $timestamp=&maketime(
1914: 'year'=>$1,'month'=>$2,'day'=>$3,
1915: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1916: }
1917: return $timestamp;
1918: }
1919:
1920: #########################################
1921:
1922: sub findallcourses {
1923: my %courses=();
1924: my $now=time;
1925: foreach (keys %ENV) {
1926: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1927: my ($starttime,$endtime)=$ENV{$_};
1928: my $active=1;
1929: if ($starttime) {
1930: if ($now<$starttime) { $active=0; }
1931: }
1932: if ($endtime) {
1933: if ($now>$endtime) { $active=0; }
1934: }
1935: if ($active) { $courses{$1.'_'.$2}=1; }
1936: }
1937: }
1938: return keys %courses;
1939: }
1940:
1941: ###############################################
1942: ###############################################
1943:
1944: =pod
1945:
1946: =head1 Domain Template Functions
1947:
1948: =over 4
1949:
1950: =item * &determinedomain()
1951:
1952: Inputs: $domain (usually will be undef)
1953:
1954: Returns: Determines which domain should be used for designs
1955:
1956: =cut
1957:
1958: ###############################################
1959: sub determinedomain {
1960: my $domain=shift;
1961: if (! $domain) {
1962: # Determine domain if we have not been given one
1963: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1964: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1965: if ($ENV{'request.role.domain'}) {
1966: $domain=$ENV{'request.role.domain'};
1967: }
1968: }
1969: return $domain;
1970: }
1971: ###############################################
1972: =pod
1973:
1974: =item * &domainlogo()
1975:
1976: Inputs: $domain (usually will be undef)
1977:
1978: Returns: A link to a domain logo, if the domain logo exists.
1979: If the domain logo does not exist, a description of the domain.
1980:
1981: =cut
1982:
1983: ###############################################
1984: sub domainlogo {
1985: my $domain = &determinedomain(shift);
1986: # See if there is a logo
1987: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1988: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
1989: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
1990: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
1991: '/adm/lonDomLogos/'.$domain.'.gif" alt="'.$domain.'" />';
1992: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1993: return $Apache::lonnet::domaindescription{$domain};
1994: } else {
1995: return '';
1996: }
1997: }
1998: ##############################################
1999:
2000: =pod
2001:
2002: =item * &designparm()
2003:
2004: Inputs: $which parameter; $domain (usually will be undef)
2005:
2006: Returns: value of designparamter $which
2007:
2008: =cut
2009:
2010: ##############################################
2011: sub designparm {
2012: my ($which,$domain)=@_;
2013: if ($ENV{'browser.blackwhite'} eq 'on') {
2014: if ($which=~/\.(font|alink|vlink|link)$/) {
2015: return '#000000';
2016: }
2017: if ($which=~/\.(pgbg|sidebg)$/) {
2018: return '#FFFFFF';
2019: }
2020: if ($which=~/\.tabbg$/) {
2021: return '#CCCCCC';
2022: }
2023: }
2024: if ($ENV{'environment.color.'.$which}) {
2025: return $ENV{'environment.color.'.$which};
2026: }
2027: $domain=&determinedomain($domain);
2028: if ($designhash{$domain.'.'.$which}) {
2029: return $designhash{$domain.'.'.$which};
2030: } else {
2031: return $designhash{'default.'.$which};
2032: }
2033: }
2034:
2035: ###############################################
2036: ###############################################
2037:
2038: =pod
2039:
2040: =back
2041:
2042: =head1 HTTP Helpers
2043:
2044: =over 4
2045:
2046: =item * &bodytag()
2047:
2048: Returns a uniform header for LON-CAPA web pages.
2049:
2050: Inputs:
2051:
2052: =over 4
2053:
2054: =item * $title, A title to be displayed on the page.
2055:
2056: =item * $function, the current role (can be undef).
2057:
2058: =item * $addentries, extra parameters for the <body> tag.
2059:
2060: =item * $bodyonly, if defined, only return the <body> tag.
2061:
2062: =item * $domain, if defined, force a given domain.
2063:
2064: =item * $forcereg, if page should register as content page (relevant for
2065: text interface only)
2066:
2067: =back
2068:
2069: Returns: A uniform header for LON-CAPA web pages.
2070: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2071: If $bodyonly is undef or zero, an html string containing a <body> tag and
2072: other decorations will be returned.
2073:
2074: =cut
2075:
2076: sub bodytag {
2077: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2078: $title=&mt($title);
2079: unless ($function) {
2080: $function='student';
2081: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2082: $function='coordinator';
2083: }
2084: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2085: $function='admin';
2086: }
2087: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2088: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2089: $function='author';
2090: }
2091: }
2092: my $img=&designparm($function.'.img',$domain);
2093: my $pgbg=&designparm($function.'.pgbg',$domain);
2094: my $tabbg=&designparm($function.'.tabbg',$domain);
2095: my $font=&designparm($function.'.font',$domain);
2096: my $link=&designparm($function.'.link',$domain);
2097: my $alink=&designparm($function.'.alink',$domain);
2098: my $vlink=&designparm($function.'.vlink',$domain);
2099: my $sidebg=&designparm($function.'.sidebg',$domain);
2100: # Accessibility font enhance
2101: unless ($addentries) { $addentries=''; }
2102: my $addstyle='';
2103: if ($ENV{'browser.fontenhance'} eq 'on') {
2104: $addstyle=' font-size: x-large;';
2105: }
2106: # role and realm
2107: my ($role,$realm)
2108: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2109: # realm
2110: if ($ENV{'request.course.id'}) {
2111: $realm=
2112: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2113: }
2114: unless ($realm) { $realm=' '; }
2115: # Set messages
2116: my $messages=&domainlogo($domain);
2117: # Port for miniserver
2118: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2119: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2120: # construct main body tag
2121: my $bodytag = <<END;
2122: <style>
2123: h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
2124: a:focus { color: red; background: yellow }
2125: </style>
2126: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2127: style="margin-top: 0px;$addstyle" $addentries>
2128: END
2129: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2130: $lonhttpdPort.$img.'" alt="'.$function.'" />';
2131: if ($bodyonly) {
2132: return $bodytag;
2133: } elsif ($ENV{'browser.interface'} eq 'textual') {
2134: # Accessibility
2135: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2136: $forcereg).
2137: '<h1>LON-CAPA: '.$title.'</h1>';
2138: } elsif ($ENV{'environment.remote'} eq 'off') {
2139: # No Remote
2140: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2141: $forcereg).
2142: '<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.
2143: '</b></font></td></tr></table>';
2144: }
2145:
2146: #
2147: # Top frame rendering, Remote is up
2148: #
2149: return(<<ENDBODY);
2150: $bodytag
2151: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2152: <tr><td bgcolor="$sidebg">
2153: $upperleft</td>
2154: <td bgcolor="$sidebg" align="right">$messages </td>
2155: </tr>
2156: <tr>
2157: <td rowspan="3" bgcolor="$tabbg">
2158: <font size="5" face="Arial, Helvetica, sans-serif"><b>$title</b></font>
2159: <td bgcolor="$tabbg" align="right">
2160: <font size="2" face="Arial, Helvetica, sans-serif">
2161: $ENV{'environment.firstname'}
2162: $ENV{'environment.middlename'}
2163: $ENV{'environment.lastname'}
2164: $ENV{'environment.generation'}
2165: </font>
2166: </td>
2167: </tr>
2168: <tr><td bgcolor="$tabbg" align="right">
2169: <font size="2" face="Arial, Helvetica, sans-serif">$role</font>
2170: </td></tr>
2171: <tr>
2172: <td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font> </td></tr>
2173: </table><br>
2174: ENDBODY
2175: }
2176:
2177: ###############################################
2178:
2179: sub get_posted_cgi {
2180: my $r=shift;
2181:
2182: my $buffer;
2183:
2184: $r->read($buffer,$r->header_in('Content-length'),0);
2185: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2186: my @pairs=split(/&/,$buffer);
2187: my $pair;
2188: foreach $pair (@pairs) {
2189: my ($name,$value) = split(/=/,$pair);
2190: $value =~ tr/+/ /;
2191: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2192: $name =~ tr/+/ /;
2193: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2194: &add_to_env("form.$name",$value);
2195: }
2196: } else {
2197: my $contentsep=$1;
2198: my @lines = split (/\n/,$buffer);
2199: my $name='';
2200: my $value='';
2201: my $fname='';
2202: my $fmime='';
2203: my $i;
2204: for ($i=0;$i<=$#lines;$i++) {
2205: if ($lines[$i]=~/^$contentsep/) {
2206: if ($name) {
2207: chomp($value);
2208: if ($fname) {
2209: $ENV{"form.$name.filename"}=$fname;
2210: $ENV{"form.$name.mimetype"}=$fmime;
2211: } else {
2212: $value=~s/\s+$//s;
2213: }
2214: &add_to_env("form.$name",$value);
2215: }
2216: if ($i<$#lines) {
2217: $i++;
2218: $lines[$i]=~
2219: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2220: $name=$1;
2221: $value='';
2222: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2223: $fname=$1;
2224: if
2225: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2226: $fmime=$1;
2227: $i++;
2228: } else {
2229: $fmime='';
2230: }
2231: } else {
2232: $fname='';
2233: $fmime='';
2234: }
2235: $i++;
2236: }
2237: } else {
2238: $value.=$lines[$i]."\n";
2239: }
2240: }
2241: }
2242: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2243: $r->method_number(M_GET);
2244: $r->method('GET');
2245: $r->headers_in->unset('Content-length');
2246: }
2247:
2248: =pod
2249:
2250: =item * get_unprocessed_cgi($query,$possible_names)
2251:
2252: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2253: $query. The parameters listed in $possible_names (an array reference),
2254: will be set in $ENV{'form.name'} if they do not already exist.
2255:
2256: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2257: $possible_names is an ref to an array of form element names. As an example:
2258: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2259: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2260:
2261: =cut
2262:
2263: sub get_unprocessed_cgi {
2264: my ($query,$possible_names)= @_;
2265: # $Apache::lonxml::debug=1;
2266: foreach (split(/&/,$query)) {
2267: my ($name, $value) = split(/=/,$_);
2268: $name = &Apache::lonnet::unescape($name);
2269: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2270: $value =~ tr/+/ /;
2271: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2272: &Apache::lonxml::debug("Seting :$name: to :$value:");
2273: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2274: }
2275: }
2276: }
2277:
2278: =pod
2279:
2280: =item * cacheheader()
2281:
2282: returns cache-controlling header code
2283:
2284: =cut
2285:
2286: sub cacheheader {
2287: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2288: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2289: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2290: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2291: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2292: return $output;
2293: }
2294:
2295: =pod
2296:
2297: =item * no_cache($r)
2298:
2299: specifies header code to not have cache
2300:
2301: =cut
2302:
2303: sub no_cache {
2304: my ($r) = @_;
2305: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2306: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2307: $r->no_cache(1);
2308: $r->header_out("Pragma" => "no-cache");
2309: #$r->header_out("Expires" => $date);
2310: }
2311:
2312: sub content_type {
2313: my ($r,$type,$charset) = @_;
2314: unless ($charset) {
2315: $charset=&Apache::lonlocal::current_encoding;
2316: }
2317: $r->content_type($type.($charset?'; charset='.$charset:''));
2318: }
2319:
2320: =pod
2321:
2322: =item * add_to_env($name,$value)
2323:
2324: adds $name to the %ENV hash with value
2325: $value, if $name already exists, the entry is converted to an array
2326: reference and $value is added to the array.
2327:
2328: =cut
2329:
2330: sub add_to_env {
2331: my ($name,$value)=@_;
2332: if (defined($ENV{$name})) {
2333: if (ref($ENV{$name})) {
2334: #already have multiple values
2335: push(@{ $ENV{$name} },$value);
2336: } else {
2337: #first time seeing multiple values, convert hash entry to an arrayref
2338: my $first=$ENV{$name};
2339: undef($ENV{$name});
2340: push(@{ $ENV{$name} },$first,$value);
2341: }
2342: } else {
2343: $ENV{$name}=$value;
2344: }
2345: }
2346:
2347: =pod
2348:
2349: =item * get_env_multiple($name)
2350:
2351: gets $name from the %ENV hash, it seemlessly handles the cases where multiple
2352: values may be defined and end up as an array ref.
2353:
2354: returns an array of values
2355:
2356: =cut
2357:
2358: sub get_env_multiple {
2359: my ($name) = @_;
2360: my @values;
2361: if (defined($ENV{$name})) {
2362: # exists is it an array
2363: if (ref($ENV{$name})) {
2364: @values=@{ $ENV{$name} };
2365: } else {
2366: $values[0]=$ENV{$name};
2367: }
2368: }
2369: return(@values);
2370: }
2371:
2372:
2373: =pod
2374:
2375: =back
2376:
2377: =head1 CSV Upload/Handling functions
2378:
2379: =over 4
2380:
2381: =item * upfile_store($r)
2382:
2383: Store uploaded file, $r should be the HTTP Request object,
2384: needs $ENV{'form.upfile'}
2385: returns $datatoken to be put into hidden field
2386:
2387: =cut
2388:
2389: sub upfile_store {
2390: my $r=shift;
2391: $ENV{'form.upfile'}=~s/\r/\n/gs;
2392: $ENV{'form.upfile'}=~s/\f/\n/gs;
2393: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2394: $ENV{'form.upfile'}=~s/\n+$//gs;
2395:
2396: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2397: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2398: {
2399: my $datafile = $r->dir_config('lonDaemons').
2400: '/tmp/'.$datatoken.'.tmp';
2401: if ( open(my $fh,">$datafile") ) {
2402: print $fh $ENV{'form.upfile'};
2403: close($fh);
2404: }
2405: }
2406: return $datatoken;
2407: }
2408:
2409: =pod
2410:
2411: =item * load_tmp_file($r)
2412:
2413: Load uploaded file from tmp, $r should be the HTTP Request object,
2414: needs $ENV{'form.datatoken'},
2415: sets $ENV{'form.upfile'} to the contents of the file
2416:
2417: =cut
2418:
2419: sub load_tmp_file {
2420: my $r=shift;
2421: my @studentdata=();
2422: {
2423: my $studentfile = $r->dir_config('lonDaemons').
2424: '/tmp/'.$ENV{'form.datatoken'}.'.tmp';
2425: if ( open(my $fh,"<$studentfile") ) {
2426: @studentdata=<$fh>;
2427: close($fh);
2428: }
2429: }
2430: $ENV{'form.upfile'}=join('',@studentdata);
2431: }
2432:
2433: =pod
2434:
2435: =item * upfile_record_sep()
2436:
2437: Separate uploaded file into records
2438: returns array of records,
2439: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2440:
2441: =cut
2442:
2443: sub upfile_record_sep {
2444: if ($ENV{'form.upfiletype'} eq 'xml') {
2445: } else {
2446: return split(/\n/,$ENV{'form.upfile'});
2447: }
2448: }
2449:
2450: =pod
2451:
2452: =item * record_sep($record)
2453:
2454: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2455:
2456: =cut
2457:
2458: sub record_sep {
2459: my $record=shift;
2460: my %components=();
2461: if ($ENV{'form.upfiletype'} eq 'xml') {
2462: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2463: my $i=0;
2464: foreach (split(/\s+/,$record)) {
2465: my $field=$_;
2466: $field=~s/^(\"|\')//;
2467: $field=~s/(\"|\')$//;
2468: $components{$i}=$field;
2469: $i++;
2470: }
2471: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2472: my $i=0;
2473: foreach (split(/\t+/,$record)) {
2474: my $field=$_;
2475: $field=~s/^(\"|\')//;
2476: $field=~s/(\"|\')$//;
2477: $components{$i}=$field;
2478: $i++;
2479: }
2480: } else {
2481: my @allfields=split(/\,/,$record);
2482: my $i=0;
2483: my $j;
2484: for ($j=0;$j<=$#allfields;$j++) {
2485: my $field=$allfields[$j];
2486: if ($field=~/^\s*(\"|\')/) {
2487: my $delimiter=$1;
2488: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2489: $j++;
2490: $field.=','.$allfields[$j];
2491: }
2492: $field=~s/^\s*$delimiter//;
2493: $field=~s/$delimiter\s*$//;
2494: }
2495: $components{$i}=$field;
2496: $i++;
2497: }
2498: }
2499: return %components;
2500: }
2501:
2502: ######################################################
2503: ######################################################
2504:
2505: =pod
2506:
2507: =item * upfile_select_html()
2508:
2509: Return HTML code to select a file from the users machine and specify
2510: the file type.
2511:
2512: =cut
2513:
2514: ######################################################
2515: ######################################################
2516: sub upfile_select_html {
2517: my %Types = (
2518: csv => &mt('CSV (comma separated values, spreadsheet)'),
2519: space => &mt('Space separated'),
2520: tab => &mt('Tabulator separated'),
2521: # xml => &mt('HTML/XML'),
2522: );
2523: my $Str = '<input type="file" name="upfile" size="50" />'.
2524: '<br />Type: <select name="upfiletype">';
2525: foreach my $type (sort(keys(%Types))) {
2526: $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
2527: }
2528: $Str .= "</select>\n";
2529: return $Str;
2530: }
2531:
2532: ######################################################
2533: ######################################################
2534:
2535: =pod
2536:
2537: =item * csv_print_samples($r,$records)
2538:
2539: Prints a table of sample values from each column uploaded $r is an
2540: Apache Request ref, $records is an arrayref from
2541: &Apache::loncommon::upfile_record_sep
2542:
2543: =cut
2544:
2545: ######################################################
2546: ######################################################
2547: sub csv_print_samples {
2548: my ($r,$records) = @_;
2549: my (%sone,%stwo,%sthree);
2550: %sone=&record_sep($$records[0]);
2551: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2552: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2553: #
2554: $r->print(&mt('Samples').'<br /><table border="2"><tr>');
2555: foreach (sort({$a <=> $b} keys(%sone))) {
2556: $r->print('<th>'.&mt('Column [_1]',($_+1)).'</th>'); }
2557: $r->print('</tr>');
2558: foreach my $hash (\%sone,\%stwo,\%sthree) {
2559: $r->print('<tr>');
2560: foreach (sort({$a <=> $b} keys(%sone))) {
2561: $r->print('<td>');
2562: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2563: $r->print('</td>');
2564: }
2565: $r->print('</tr>');
2566: }
2567: $r->print('</tr></table><br />'."\n");
2568: }
2569:
2570: ######################################################
2571: ######################################################
2572:
2573: =pod
2574:
2575: =item * csv_print_select_table($r,$records,$d)
2576:
2577: Prints a table to create associations between values and table columns.
2578:
2579: $r is an Apache Request ref,
2580: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2581: $d is an array of 2 element arrays (internal name, displayed name)
2582:
2583: =cut
2584:
2585: ######################################################
2586: ######################################################
2587: sub csv_print_select_table {
2588: my ($r,$records,$d) = @_;
2589: my $i=0;my %sone;
2590: %sone=&record_sep($$records[0]);
2591: $r->print(&mt('Associate columns with student attributes.')."\n".
2592: '<table border="2"><tr>'.
2593: '<th>'.&mt('Attribute').'</th>'.
2594: '<th>'.&mt('Column').'</th></tr>'."\n");
2595: foreach (@$d) {
2596: my ($value,$display)=@{ $_ };
2597: $r->print('<tr><td>'.$display.'</td>');
2598:
2599: $r->print('<td><select name=f'.$i.
2600: ' onchange="javascript:flip(this.form,'.$i.');">');
2601: $r->print('<option value="none"></option>');
2602: foreach (sort({$a <=> $b} keys(%sone))) {
2603: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
2604: }
2605: $r->print('</select></td></tr>'."\n");
2606: $i++;
2607: }
2608: $i--;
2609: return $i;
2610: }
2611:
2612: ######################################################
2613: ######################################################
2614:
2615: =pod
2616:
2617: =item * csv_samples_select_table($r,$records,$d)
2618:
2619: Prints a table of sample values from the upload and can make associate samples to internal names.
2620:
2621: $r is an Apache Request ref,
2622: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2623: $d is an array of 2 element arrays (internal name, displayed name)
2624:
2625: =cut
2626:
2627: ######################################################
2628: ######################################################
2629: sub csv_samples_select_table {
2630: my ($r,$records,$d) = @_;
2631: my %sone; my %stwo; my %sthree;
2632: my $i=0;
2633: #
2634: $r->print('<table border=2><tr><th>'.
2635: &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
2636: %sone=&record_sep($$records[0]);
2637: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2638: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2639: #
2640: foreach (sort keys %sone) {
2641: $r->print('<tr><td><select name="f'.$i.'"'.
2642: ' onchange="javascript:flip(this.form,'.$i.');">');
2643: foreach (@$d) {
2644: my ($value,$display)=@{ $_ };
2645: $r->print('<option value="'.$value.'">'.$display.'</option>');
2646: }
2647: $r->print('</select></td><td>');
2648: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
2649: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
2650: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
2651: $r->print('</td></tr>');
2652: $i++;
2653: }
2654: $i--;
2655: return($i);
2656: }
2657:
2658: ######################################################
2659: ######################################################
2660:
2661: =pod
2662:
2663: =item clean_excel_name($name)
2664:
2665: Returns a replacement for $name which does not contain any illegal characters.
2666:
2667: =cut
2668:
2669: ######################################################
2670: ######################################################
2671: sub clean_excel_name {
2672: my ($name) = @_;
2673: $name =~ s/[:\*\?\/\\]//g;
2674: if (length($name) > 31) {
2675: $name = substr($name,0,31);
2676: }
2677: return $name;
2678: }
2679:
2680: =pod
2681:
2682: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
2683:
2684: Returns either 1 or undef
2685:
2686: 1 if the part is to be hidden, undef if it is to be shown
2687:
2688: Arguments are:
2689:
2690: $id the id of the part to be checked
2691: $symb, optional the symb of the resource to check
2692: $udom, optional the domain of the user to check for
2693: $uname, optional the username of the user to check for
2694:
2695: =cut
2696:
2697: sub check_if_partid_hidden {
2698: my ($id,$symb,$udom,$uname) = @_;
2699: my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
2700: $symb,$udom,$uname);
2701: my $truth=1;
2702: #if the string starts with !, then the list is the list to show not hide
2703: if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
2704: my @hiddenlist=split(/,/,$hiddenparts);
2705: foreach my $checkid (@hiddenlist) {
2706: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
2707: }
2708: return !$truth;
2709: }
2710:
2711:
2712: ############################################################
2713: ############################################################
2714:
2715: =pod
2716:
2717: =back
2718:
2719: =head1 cgi-bin script and graphing routines
2720:
2721: =over 4
2722:
2723: =item get_cgi_id
2724:
2725: Inputs: none
2726:
2727: Returns an id which can be used to pass environment variables
2728: to various cgi-bin scripts. These environment variables will
2729: be removed from the users environment after a given time by
2730: the routine &Apache::lonnet::transfer_profile_to_env.
2731:
2732: =cut
2733:
2734: ############################################################
2735: ############################################################
2736: my $uniq=0;
2737: sub get_cgi_id {
2738: $uniq=($uniq+1)%100000;
2739: return (time.'_'.$uniq);
2740: }
2741:
2742: ############################################################
2743: ############################################################
2744:
2745: =pod
2746:
2747: =item DrawBarGraph
2748:
2749: Facilitates the plotting of data in a (stacked) bar graph.
2750: Puts plot definition data into the users environment in order for
2751: graph.png to plot it. Returns an <img> tag for the plot.
2752: The bars on the plot are labeled '1','2',...,'n'.
2753:
2754: Inputs:
2755:
2756: =over 4
2757:
2758: =item $Title: string, the title of the plot
2759:
2760: =item $xlabel: string, text describing the X-axis of the plot
2761:
2762: =item $ylabel: string, text describing the Y-axis of the plot
2763:
2764: =item $Max: scalar, the maximum Y value to use in the plot
2765: If $Max is < any data point, the graph will not be rendered.
2766:
2767: =item $colors: array ref holding the colors to be used for the data sets when
2768: they are plotted. If undefined, default values will be used.
2769:
2770: =item @Values: An array of array references. Each array reference holds data
2771: to be plotted in a stacked bar chart.
2772:
2773: =back
2774:
2775: Returns:
2776:
2777: An <img> tag which references graph.png and the appropriate identifying
2778: information for the plot.
2779:
2780: =cut
2781:
2782: ############################################################
2783: ############################################################
2784: sub DrawBarGraph {
2785: my ($Title,$xlabel,$ylabel,$Max,$colors,@Values)=@_;
2786: #
2787: if (! defined($colors)) {
2788: $colors = ['#33ff00',
2789: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
2790: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
2791: ];
2792: }
2793: #
2794: my $identifier = &get_cgi_id();
2795: my $id = 'cgi.'.$identifier;
2796: if (! @Values || ref($Values[0]) ne 'ARRAY') {
2797: return '';
2798: }
2799: my $NumBars = scalar(@{$Values[0]});
2800: my %ValuesHash;
2801: my $NumSets=1;
2802: foreach my $array (@Values) {
2803: next if (! ref($array));
2804: $ValuesHash{$id.'.data.'.$NumSets++} =
2805: join(',',@$array);
2806: }
2807: #
2808: my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
2809: if ($NumBars < 10) {
2810: $width = 120+$NumBars*15;
2811: $xskip = 1;
2812: $bar_width = 15;
2813: } elsif ($NumBars <= 25) {
2814: $width = 120+$NumBars*11;
2815: $xskip = 5;
2816: $bar_width = 8;
2817: } elsif ($NumBars <= 50) {
2818: $width = 120+$NumBars*8;
2819: $xskip = 5;
2820: $bar_width = 4;
2821: } else {
2822: $width = 120+$NumBars*8;
2823: $xskip = 5;
2824: $bar_width = 4;
2825: }
2826: #
2827: my @Labels;
2828: for (my $i=0;$i<@{$Values[0]};$i++) {
2829: push (@Labels,$i+1);
2830: }
2831: #
2832: $Max = 1 if ($Max < 1);
2833: if ( int($Max) < $Max ) {
2834: $Max++;
2835: $Max = int($Max);
2836: }
2837: $Title = '' if (! defined($Title));
2838: $xlabel = '' if (! defined($xlabel));
2839: $ylabel = '' if (! defined($ylabel));
2840: $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
2841: $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
2842: $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
2843: $ValuesHash{$id.'.y_max_value'} = $Max;
2844: $ValuesHash{$id.'.NumBars'} = $NumBars;
2845: $ValuesHash{$id.'.NumSets'} = $NumSets;
2846: $ValuesHash{$id.'.PlotType'} = 'bar';
2847: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2848: $ValuesHash{$id.'.height'} = $height;
2849: $ValuesHash{$id.'.width'} = $width;
2850: $ValuesHash{$id.'.xskip'} = $xskip;
2851: $ValuesHash{$id.'.bar_width'} = $bar_width;
2852: $ValuesHash{$id.'.labels'} = join(',',@Labels);
2853: #
2854: &Apache::lonnet::appenv(%ValuesHash);
2855: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2856: }
2857:
2858: ############################################################
2859: ############################################################
2860:
2861: =pod
2862:
2863: =item DrawXYGraph
2864:
2865: Facilitates the plotting of data in an XY graph.
2866: Puts plot definition data into the users environment in order for
2867: graph.png to plot it. Returns an <img> tag for the plot.
2868:
2869: Inputs:
2870:
2871: =over 4
2872:
2873: =item $Title: string, the title of the plot
2874:
2875: =item $xlabel: string, text describing the X-axis of the plot
2876:
2877: =item $ylabel: string, text describing the Y-axis of the plot
2878:
2879: =item $Max: scalar, the maximum Y value to use in the plot
2880: If $Max is < any data point, the graph will not be rendered.
2881:
2882: =item $colors: Array ref containing the hex color codes for the data to be
2883: plotted in. If undefined, default values will be used.
2884:
2885: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2886:
2887: =item $Ydata: Array ref containing Array refs.
2888: Each of the contained arrays will be plotted as a seperate curve.
2889:
2890: =item %Values: hash indicating or overriding any default values which are
2891: passed to graph.png.
2892: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2893:
2894: =back
2895:
2896: Returns:
2897:
2898: An <img> tag which references graph.png and the appropriate identifying
2899: information for the plot.
2900:
2901: =cut
2902:
2903: ############################################################
2904: ############################################################
2905: sub DrawXYGraph {
2906: my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
2907: #
2908: # Create the identifier for the graph
2909: my $identifier = &get_cgi_id();
2910: my $id = 'cgi.'.$identifier;
2911: #
2912: $Title = '' if (! defined($Title));
2913: $xlabel = '' if (! defined($xlabel));
2914: $ylabel = '' if (! defined($ylabel));
2915: my %ValuesHash =
2916: (
2917: $id.'.title' => &Apache::lonnet::escape($Title),
2918: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
2919: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
2920: $id.'.y_max_value'=> $Max,
2921: $id.'.labels' => join(',',@$Xlabels),
2922: $id.'.PlotType' => 'XY',
2923: );
2924: #
2925: if (defined($colors) && ref($colors) eq 'ARRAY') {
2926: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
2927: }
2928: #
2929: if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
2930: return '';
2931: }
2932: my $NumSets=1;
2933: foreach my $array (@{$Ydata}){
2934: next if (! ref($array));
2935: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
2936: }
2937: $ValuesHash{$id.'.NumSets'} = $NumSets-1;
2938: #
2939: # Deal with other parameters
2940: while (my ($key,$value) = each(%Values)) {
2941: $ValuesHash{$id.'.'.$key} = $value;
2942: }
2943: #
2944: &Apache::lonnet::appenv(%ValuesHash);
2945: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
2946: }
2947:
2948: ############################################################
2949: ############################################################
2950:
2951: =pod
2952:
2953: =item DrawXYYGraph
2954:
2955: Facilitates the plotting of data in an XY graph with two Y axes.
2956: Puts plot definition data into the users environment in order for
2957: graph.png to plot it. Returns an <img> tag for the plot.
2958:
2959: Inputs:
2960:
2961: =over 4
2962:
2963: =item $Title: string, the title of the plot
2964:
2965: =item $xlabel: string, text describing the X-axis of the plot
2966:
2967: =item $ylabel: string, text describing the Y-axis of the plot
2968:
2969: =item $colors: Array ref containing the hex color codes for the data to be
2970: plotted in. If undefined, default values will be used.
2971:
2972: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
2973:
2974: =item $Ydata1: The first data set
2975:
2976: =item $Min1: The minimum value of the left Y-axis
2977:
2978: =item $Max1: The maximum value of the left Y-axis
2979:
2980: =item $Ydata2: The second data set
2981:
2982: =item $Min2: The minimum value of the right Y-axis
2983:
2984: =item $Max2: The maximum value of the left Y-axis
2985:
2986: =item %Values: hash indicating or overriding any default values which are
2987: passed to graph.png.
2988: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
2989:
2990: =back
2991:
2992: Returns:
2993:
2994: An <img> tag which references graph.png and the appropriate identifying
2995: information for the plot.
2996:
2997: =cut
2998:
2999: ############################################################
3000: ############################################################
3001: sub DrawXYYGraph {
3002: my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
3003: $Ydata2,$Min2,$Max2,%Values)=@_;
3004: #
3005: # Create the identifier for the graph
3006: my $identifier = &get_cgi_id();
3007: my $id = 'cgi.'.$identifier;
3008: #
3009: $Title = '' if (! defined($Title));
3010: $xlabel = '' if (! defined($xlabel));
3011: $ylabel = '' if (! defined($ylabel));
3012: my %ValuesHash =
3013: (
3014: $id.'.title' => &Apache::lonnet::escape($Title),
3015: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
3016: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
3017: $id.'.labels' => join(',',@$Xlabels),
3018: $id.'.PlotType' => 'XY',
3019: $id.'.NumSets' => 2,
3020: $id.'.two_axes' => 1,
3021: $id.'.y1_max_value' => $Max1,
3022: $id.'.y1_min_value' => $Min1,
3023: $id.'.y2_max_value' => $Max2,
3024: $id.'.y2_min_value' => $Min2,
3025: );
3026: #
3027: if (defined($colors) && ref($colors) eq 'ARRAY') {
3028: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3029: }
3030: #
3031: if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
3032: ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
3033: return '';
3034: }
3035: my $NumSets=1;
3036: foreach my $array ($Ydata1,$Ydata2){
3037: next if (! ref($array));
3038: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3039: }
3040: #
3041: # Deal with other parameters
3042: while (my ($key,$value) = each(%Values)) {
3043: $ValuesHash{$id.'.'.$key} = $value;
3044: }
3045: #
3046: &Apache::lonnet::appenv(%ValuesHash);
3047: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3048: }
3049:
3050: ############################################################
3051: ############################################################
3052:
3053: =pod
3054:
3055: =back
3056:
3057: =head1 Statistics helper routines?
3058:
3059: Bad place for them but what the hell.
3060:
3061: =over 4
3062:
3063: =item &chartlink
3064:
3065: Returns a link to the chart for a specific student.
3066:
3067: Inputs:
3068:
3069: =over 4
3070:
3071: =item $linktext: The text of the link
3072:
3073: =item $sname: The students username
3074:
3075: =item $sdomain: The students domain
3076:
3077: =back
3078:
3079: =back
3080:
3081: =cut
3082:
3083: ############################################################
3084: ############################################################
3085: sub chartlink {
3086: my ($linktext, $sname, $sdomain) = @_;
3087: my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
3088: '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
3089: '&chartoutputmode='.HTML::Entities::encode('html, with all links').
3090: '">'.$linktext.'</a>';
3091: }
3092:
3093: #######################################################
3094: #######################################################
3095:
3096: =pod
3097:
3098: =head1 Course Environment Routines
3099:
3100: =over 4
3101:
3102: =item &restore_course_settings
3103:
3104: =item &store_course_settings
3105:
3106: Restores/Store indicated form parameters from the course environment.
3107: Will not overwrite existing values of the form parameters.
3108:
3109: Inputs:
3110: a scalar describing the data (e.g. 'chart', 'problem_analysis')
3111:
3112: a hash ref describing the data to be stored. For example:
3113:
3114: %Save_Parameters = ('Status' => 'scalar',
3115: 'chartoutputmode' => 'scalar',
3116: 'chartoutputdata' => 'scalar',
3117: 'Section' => 'array',
3118: 'StudentData' => 'array',
3119: 'Maps' => 'array');
3120:
3121: Returns: both routines return nothing
3122:
3123: =cut
3124:
3125: #######################################################
3126: #######################################################
3127: sub store_course_settings {
3128: # save to the environment
3129: # appenv the same items, just to be safe
3130: my $courseid = $ENV{'request.course.id'};
3131: my $coursedom = $ENV{'course.'.$courseid.'.domain'};
3132: my ($prefix,$Settings) = @_;
3133: my %SaveHash;
3134: my %AppHash;
3135: while (my ($setting,$type) = each(%$Settings)) {
3136: my $basename = 'env.internal.'.$prefix.'.'.$setting;
3137: my $envname = 'course.'.$courseid.'.'.$basename;
3138: if (exists($ENV{'form.'.$setting})) {
3139: # Save this value away
3140: if ($type eq 'scalar' &&
3141: (! exists($ENV{$envname}) ||
3142: $ENV{$envname} ne $ENV{'form.'.$setting})) {
3143: $SaveHash{$basename} = $ENV{'form.'.$setting};
3144: $AppHash{$envname} = $ENV{'form.'.$setting};
3145: } elsif ($type eq 'array') {
3146: my $stored_form;
3147: if (ref($ENV{'form.'.$setting})) {
3148: $stored_form = join(',',
3149: map {
3150: &Apache::lonnet::escape($_);
3151: } sort(@{$ENV{'form.'.$setting}}));
3152: } else {
3153: $stored_form =
3154: &Apache::lonnet::escape($ENV{'form.'.$setting});
3155: }
3156: # Determine if the array contents are the same.
3157: if ($stored_form ne $ENV{$envname}) {
3158: $SaveHash{$basename} = $stored_form;
3159: $AppHash{$envname} = $stored_form;
3160: }
3161: }
3162: }
3163: }
3164: my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
3165: $coursedom,
3166: $ENV{'course.'.$courseid.'.num'});
3167: if ($put_result !~ /^(ok|delayed)/) {
3168: &Apache::lonnet::logthis('unable to save form parameters, '.
3169: 'got error:'.$put_result);
3170: }
3171: # Make sure these settings stick around in this session, too
3172: &Apache::lonnet::appenv(%AppHash);
3173: return;
3174: }
3175:
3176: sub restore_course_settings {
3177: my $courseid = $ENV{'request.course.id'};
3178: my ($prefix,$Settings) = @_;
3179: while (my ($setting,$type) = each(%$Settings)) {
3180: next if (exists($ENV{'form.'.$setting}));
3181: my $envname = 'course.'.$courseid.'.env.internal.'.$prefix.
3182: '.'.$setting;
3183: if (exists($ENV{$envname})) {
3184: if ($type eq 'scalar') {
3185: $ENV{'form.'.$setting} = $ENV{$envname};
3186: } elsif ($type eq 'array') {
3187: $ENV{'form.'.$setting} = [
3188: map {
3189: &Apache::lonnet::unescape($_);
3190: } split(',',$ENV{$envname})
3191: ];
3192: }
3193: }
3194: }
3195: }
3196:
3197: ############################################################
3198: ############################################################
3199:
3200: sub propath {
3201: my ($udom,$uname)=@_;
3202: $udom=~s/\W//g;
3203: $uname=~s/\W//g;
3204: my $subdir=$uname.'__';
3205: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3206: my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3207: return $proname;
3208: }
3209:
3210: sub icon {
3211: my ($file)=@_;
3212: my @file_ext = split(/\./,$file);
3213: my $curfext = $file_ext[-1];
3214: my $iconname="unknown.gif";
3215: my $embstyle = &Apache::loncommon::fileembstyle($curfext);
3216: # The unless conditional that follows is a bit of overkill
3217: $iconname = $curfext.".gif" unless
3218: (!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn');
3219: return $Apache::lonnet::perlvar{'lonIconsURL'}."/$iconname";
3220: }
3221:
3222: =pod
3223:
3224: =back
3225:
3226: =cut
3227:
3228: 1;
3229: __END__;
3230:
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