Annotation of loncom/interface/loncommon.pm, revision 1.64
1.10 albertel 1: # The LearningOnline Network with CAPA
1.1 albertel 2: # a pile of common routines
1.10 albertel 3: #
1.64 ! sakharuk 4: # $Id: loncommon.pm,v 1.63 2002/08/28 19:42:49 www Exp $
1.10 albertel 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: #
1.12 harris41 28: # YEAR=2001
29: # 2/13-12/7 Guy Albertelli
1.17 harris41 30: # 12/11,12/12,12/17 Scott Harrison
1.18 www 31: # 12/21 Gerd Kortemeyer
1.20 www 32: # 12/21 Scott Harrison
1.22 www 33: # 12/25,12/28 Gerd Kortemeyer
1.23 www 34: # YEAR=2002
35: # 1/4 Gerd Kortemeyer
1.43 ng 36: # 6/24,7/2 H. K. Ng
1.1 albertel 37:
38: # Makes a table out of the previous attempts
1.2 albertel 39: # Inputs result_from_symbread, user, domain, course_id
1.16 harris41 40: # Reads in non-network-related .tab files
1.1 albertel 41:
1.35 matthew 42: # POD header:
43:
1.45 matthew 44: =pod
45:
1.35 matthew 46: =head1 NAME
47:
48: Apache::loncommon - pile of common routines
49:
50: =head1 SYNOPSIS
51:
52: Referenced by other mod_perl Apache modules.
53:
54: Invocation:
55: &Apache::loncommon::SUBROUTINENAME(ARGUMENTS);
56:
57: =head1 INTRODUCTION
58:
59: Common collection of used subroutines. This collection helps remove
60: redundancy from other modules and increase efficiency of memory usage.
61:
62: Current things done:
63:
64: Makes a table out of the previous homework attempts
65: Inputs result_from_symbread, user, domain, course_id
66: Reads in non-network-related .tab files
67:
68: This is part of the LearningOnline Network with CAPA project
69: described at http://www.lon-capa.org.
70:
1.41 ng 71: =head2 General Subroutines
1.35 matthew 72:
73: =over 4
74:
75: =cut
76:
77: # End of POD header
1.1 albertel 78: package Apache::loncommon;
79:
80: use strict;
1.22 www 81: use Apache::lonnet();
1.46 matthew 82: use GDBM_File;
1.51 www 83: use POSIX qw(strftime mktime);
1.1 albertel 84: use Apache::Constants qw(:common);
85: use Apache::lonmsg();
1.22 www 86: my $readit;
87:
1.46 matthew 88: =pod
89:
90: =item Global Variables
91:
92: =over 4
93:
94: =cut
1.20 www 95: # ----------------------------------------------- Filetypes/Languages/Copyright
1.12 harris41 96: my %language;
97: my %cprtag;
98: my %fe; my %fd;
1.41 ng 99: my %category_extensions;
1.12 harris41 100:
1.63 www 101: # ---------------------------------------------- Designs
102:
103: my %designhash;
104:
1.46 matthew 105: # ---------------------------------------------- Thesaurus variables
106:
107: =pod
108:
109: =item %Keywords
110:
111: A hash used by &keyword to determine if a word is considered a keyword.
112:
113: =item $thesaurus_db_file
114:
115: Scalar containing the full path to the thesaurus database.
116:
117: =cut
118:
119: my %Keywords;
120: my $thesaurus_db_file;
121:
122:
123: =pod
124:
125: =back
126:
127: =cut
1.20 www 128:
1.12 harris41 129: # ----------------------------------------------------------------------- BEGIN
1.41 ng 130:
131: =pod
132:
1.35 matthew 133: =item BEGIN()
134:
135: Initialize values from language.tab, copyright.tab, filetypes.tab,
1.45 matthew 136: thesaurus.tab, and filecategories.tab.
1.35 matthew 137:
138: =cut
1.45 matthew 139:
1.35 matthew 140: # ----------------------------------------------------------------------- BEGIN
141:
1.18 www 142: BEGIN {
1.46 matthew 143: # Variable initialization
144: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
145: #
1.22 www 146: unless ($readit) {
1.12 harris41 147: # ------------------------------------------------------------------- languages
148: {
149: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
150: '/language.tab');
1.16 harris41 151: if ($fh) {
152: while (<$fh>) {
153: next if /^\#/;
154: chomp;
155: my ($key,$val)=(split(/\s+/,$_,2));
156: $language{$key}=$val;
157: }
1.12 harris41 158: }
159: }
160: # ------------------------------------------------------------------ copyrights
161: {
1.16 harris41 162: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
163: '/copyright.tab');
164: if ($fh) {
165: while (<$fh>) {
166: next if /^\#/;
167: chomp;
168: my ($key,$val)=(split(/\s+/,$_,2));
169: $cprtag{$key}=$val;
170: }
1.12 harris41 171: }
172: }
1.63 www 173:
174: # -------------------------------------------------------------- domain designs
175:
176: my $filename;
177: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
178: opendir(DIR,$designdir);
179: while ($filename=readdir(DIR)) {
180: my ($domain)=($filename=~/^(\w+)\./);
181: {
182: my $fh=Apache::File->new($designdir.'/'.$filename);
183: if ($fh) {
184: while (<$fh>) {
185: next if /^\#/;
186: chomp;
187: my ($key,$val)=(split(/\=/,$_));
188: if ($val) { $designhash{$domain.'.'.$key}=$val; }
189: }
190: }
191: }
192:
193: }
194: closedir(DIR);
195:
196:
1.15 harris41 197: # ------------------------------------------------------------- file categories
198: {
199: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
1.16 harris41 200: '/filecategories.tab');
201: if ($fh) {
202: while (<$fh>) {
203: next if /^\#/;
204: chomp;
1.41 ng 205: my ($extension,$category)=(split(/\s+/,$_,2));
206: push @{$category_extensions{lc($category)}},$extension;
1.16 harris41 207: }
1.15 harris41 208: }
209: }
1.12 harris41 210: # ------------------------------------------------------------------ file types
211: {
1.16 harris41 212: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
213: '/filetypes.tab');
214: if ($fh) {
215: while (<$fh>) {
216: next if (/^\#/);
217: chomp;
218: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
219: if ($descr ne '') {
220: $fe{$ending}=lc($emb);
221: $fd{$ending}=$descr;
222: }
1.12 harris41 223: }
224: }
225: }
1.22 www 226: &Apache::lonnet::logthis(
1.46 matthew 227: "<font color=yellow>INFO: Read file types</font>");
1.22 www 228: $readit=1;
1.46 matthew 229: } # end of unless($readit)
1.32 matthew 230:
231: }
232: # ============================================================= END BEGIN BLOCK
1.42 matthew 233: ###############################################################
234: ## HTML and Javascript Helper Functions ##
235: ###############################################################
236:
237: =pod
238:
239: =item browser_and_searcher_javascript
240:
241: Returns scalar containing javascript to open a browser window
242: or a searcher window. Also creates
243:
244: =over 4
245:
246: =item openbrowser(formname,elementname,only,omit) [javascript]
247:
248: inputs: formname, elementname, only, omit
249:
250: formname and elementname indicate the name of the html form and name of
251: the element that the results of the browsing selection are to be placed in.
252:
253: Specifying 'only' will restrict the browser to displaying only files
254: with the given extension. Can be a comma seperated list.
255:
256: Specifying 'omit' will restrict the browser to NOT displaying files
257: with the given extension. Can be a comma seperated list.
258:
259: =item opensearcher(formname, elementname) [javascript]
260:
261: Inputs: formname, elementname
262:
263: formname and elementname specify the name of the html form and the name
264: of the element the selection from the search results will be placed in.
265:
266: =back
267:
268: =cut
269:
270: ###############################################################
271: sub browser_and_searcher_javascript {
272: return <<END;
1.50 matthew 273: var editbrowser = null;
1.42 matthew 274: function openbrowser(formname,elementname,only,omit) {
275: var url = '/res/?';
276: if (editbrowser == null) {
277: url += 'launch=1&';
278: }
279: url += 'catalogmode=interactive&';
280: url += 'mode=edit&';
281: url += 'form=' + formname + '&';
282: if (only != null) {
283: url += 'only=' + only + '&';
284: }
285: if (omit != null) {
286: url += 'omit=' + omit + '&';
287: }
288: url += 'element=' + elementname + '';
289: var title = 'Browser';
290: var options = 'scrollbars=1,resizable=1,menubar=0';
291: options += ',width=700,height=600';
292: editbrowser = open(url,title,options,'1');
293: editbrowser.focus();
294: }
295: var editsearcher;
296: function opensearcher(formname,elementname) {
297: var url = '/adm/searchcat?';
298: if (editsearcher == null) {
299: url += 'launch=1&';
300: }
301: url += 'catalogmode=interactive&';
302: url += 'mode=edit&';
303: url += 'form=' + formname + '&';
304: url += 'element=' + elementname + '';
305: var title = 'Search';
306: var options = 'scrollbars=1,resizable=1,menubar=0';
307: options += ',width=700,height=600';
308: editsearcher = open(url,title,options,'1');
309: editsearcher.focus();
310: }
311: END
312: }
313:
314:
315:
316: ###############################################################
317:
318: =pod
1.36 matthew 319:
320: =item linked_select_forms(...)
321:
322: linked_select_forms returns a string containing a <script></script> block
323: and html for two <select> menus. The select menus will be linked in that
324: changing the value of the first menu will result in new values being placed
325: in the second menu. The values in the select menu will appear in alphabetical
326: order.
327:
328: linked_select_forms takes the following ordered inputs:
329:
330: =over 4
331:
332: =item $formname, the name of the <form> tag
333:
334: =item $middletext, the text which appears between the <select> tags
335:
336: =item $firstdefault, the default value for the first menu
337:
338: =item $firstselectname, the name of the first <select> tag
339:
340: =item $secondselectname, the name of the second <select> tag
341:
342: =item $hashref, a reference to a hash containing the data for the menus.
343:
1.41 ng 344: =back
345:
1.36 matthew 346: Below is an example of such a hash. Only the 'text', 'default', and
347: 'select2' keys must appear as stated. keys(%menu) are the possible
348: values for the first select menu. The text that coincides with the
1.41 ng 349: first menu value is given in $menu{$choice1}->{'text'}. The values
1.36 matthew 350: and text for the second menu are given in the hash pointed to by
351: $menu{$choice1}->{'select2'}.
352:
1.41 ng 353: my %menu = ( A1 => { text =>"Choice A1" ,
1.36 matthew 354: default => "B3",
355: select2 => {
356: B1 => "Choice B1",
357: B2 => "Choice B2",
358: B3 => "Choice B3",
359: B4 => "Choice B4"
360: }
361: },
362: A2 => { text =>"Choice A2" ,
363: default => "C2",
364: select2 => {
365: C1 => "Choice C1",
366: C2 => "Choice C2",
367: C3 => "Choice C3"
368: }
369: },
370: A3 => { text =>"Choice A3" ,
371: default => "D6",
372: select2 => {
373: D1 => "Choice D1",
374: D2 => "Choice D2",
375: D3 => "Choice D3",
376: D4 => "Choice D4",
377: D5 => "Choice D5",
378: D6 => "Choice D6",
379: D7 => "Choice D7"
380: }
381: }
382: );
383:
384: =cut
385:
386: # ------------------------------------------------
387:
388: sub linked_select_forms {
389: my ($formname,
390: $middletext,
391: $firstdefault,
392: $firstselectname,
393: $secondselectname,
394: $hashref
395: ) = @_;
396: my $second = "document.$formname.$secondselectname";
397: my $first = "document.$formname.$firstselectname";
398: # output the javascript to do the changing
399: my $result = '';
400: $result.="<script>\n";
401: $result.="var select2data = new Object();\n";
402: $" = '","';
403: my $debug = '';
404: foreach my $s1 (sort(keys(%$hashref))) {
405: $result.="select2data.d_$s1 = new Object();\n";
406: $result.="select2data.d_$s1.def = new String('".
407: $hashref->{$s1}->{'default'}."');\n";
408: $result.="select2data.d_$s1.values = new Array(";
409: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
410: $result.="\"@s2values\");\n";
411: $result.="select2data.d_$s1.texts = new Array(";
412: my @s2texts;
413: foreach my $value (@s2values) {
414: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
415: }
416: $result.="\"@s2texts\");\n";
417: }
418: $"=' ';
419: $result.= <<"END";
420:
421: function select1_changed() {
422: // Determine new choice
423: var newvalue = "d_" + $first.value;
424: // update select2
425: var values = select2data[newvalue].values;
426: var texts = select2data[newvalue].texts;
427: var select2def = select2data[newvalue].def;
428: var i;
429: // out with the old
430: for (i = 0; i < $second.options.length; i++) {
431: $second.options[i] = null;
432: }
433: // in with the nuclear
434: for (i=0;i<values.length; i++) {
435: $second.options[i] = new Option(values[i]);
436: $second.options[i].text = texts[i];
437: if (values[i] == select2def) {
438: $second.options[i].selected = true;
439: }
440: }
441: }
442: </script>
443: END
444: # output the initial values for the selection lists
445: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
446: foreach my $value (sort(keys(%$hashref))) {
447: $result.=" <option value=\"$value\" ";
448: $result.=" selected=\"true\" " if ($value eq $firstdefault);
449: $result.=">$hashref->{$value}->{'text'}</option>\n";
450: }
451: $result .= "</select>\n";
452: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
453: $result .= $middletext;
454: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
455: my $seconddefault = $hashref->{$firstdefault}->{'default'};
456: foreach my $value (sort(keys(%select2))) {
457: $result.=" <option value=\"$value\" ";
458: $result.=" selected=\"true\" " if ($value eq $seconddefault);
459: $result.=">$select2{$value}</option>\n";
460: }
461: $result .= "</select>\n";
462: # return $debug;
463: return $result;
464: } # end of sub linked_select_forms {
465:
1.33 matthew 466: ###############################################################
1.44 bowersj2 467:
1.45 matthew 468: =pod
1.44 bowersj2 469:
1.48 bowersj2 470: =item help_open_topic($topic, $text, $stayOnPage, $width, $height)
1.44 bowersj2 471:
472: Returns a string corresponding to an HTML link to the given help $topic, where $topic corresponds to the name of a .tex file in /home/httpd/html/adm/help/tex, with underscores replaced by spaces.
473:
1.48 bowersj2 474: $text will optionally be linked to the same topic, allowing you to link text in addition to the graphic. If you do not want to link text, but wish to specify one of the later parameters, pass an empty string.
475:
1.44 bowersj2 476: $stayOnPage is a value that will be interpreted as a boolean. If true, the link will not open a new window. If false, the link will open a new window using Javascript. (Default is false.)
477:
478: $width and $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.
479:
480: =cut
481:
482: sub help_open_topic {
1.48 bowersj2 483: my ($topic, $text, $stayOnPage, $width, $height) = @_;
484: $text = "" if (not defined $text);
1.44 bowersj2 485: $stayOnPage = 0 if (not defined $stayOnPage);
486: $width = 350 if (not defined $width);
487: $height = 400 if (not defined $height);
488: my $filename = $topic;
489: $filename =~ s/ /_/g;
490:
1.48 bowersj2 491: my $template = "";
492: my $link;
1.44 bowersj2 493:
494: if (!$stayOnPage)
495: {
1.48 bowersj2 496: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height'))";
1.44 bowersj2 497: }
498: else
499: {
1.48 bowersj2 500: $link = "/adm/help/${filename}.hlp";
501: }
502:
503: # Add the text
504: if ($text ne "")
505: {
506: $template .= "<a href=\"$link\">$text</a> ";
507: }
508:
509: # Add the graphic
510: $template .= <<"ENDTEMPLATE";
1.57 albertel 511: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
1.44 bowersj2 512: ENDTEMPLATE
513:
514: return $template;
515:
516: }
1.37 matthew 517:
1.45 matthew 518: =pod
519:
1.37 matthew 520: =item csv_translate($text)
521:
522: Translate $text to allow it to be output as a 'comma seperated values'
523: format.
524:
525: =cut
526:
527: sub csv_translate {
528: my $text = shift;
529: $text =~ s/\"/\"\"/g;
530: $text =~ s/\n//g;
531: return $text;
532: }
533:
534: ###############################################################
1.33 matthew 535: ## Home server <option> list generating code ##
536: ###############################################################
1.35 matthew 537: #-------------------------------------------
538:
1.45 matthew 539: =pod
540:
1.35 matthew 541: =item get_domains()
542:
543: Returns an array containing each of the domains listed in the hosts.tab
544: file.
545:
546: =cut
547:
548: #-------------------------------------------
1.34 matthew 549: sub get_domains {
550: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
551: my @domains;
552: my %seen;
553: foreach (sort values(%Apache::lonnet::hostdom)) {
554: push (@domains,$_) unless $seen{$_}++;
555: }
556: return @domains;
557: }
558:
1.35 matthew 559: #-------------------------------------------
560:
1.45 matthew 561: =pod
562:
1.35 matthew 563: =item select_dom_form($defdom,$name)
564:
565: Returns a string containing a <select name='$name' size='1'> form to
566: allow a user to select the domain to preform an operation in.
567: See loncreateuser.pm for an example invocation and use.
568:
569: =cut
570:
571: #-------------------------------------------
1.34 matthew 572: sub select_dom_form {
573: my ($defdom,$name) = @_;
574: my @domains = get_domains();
575: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
576: foreach (@domains) {
577: $selectdomain.="<option value=\"$_\" ".
578: ($_ eq $defdom ? 'selected' : '').
579: ">$_</option>\n";
580: }
581: $selectdomain.="</select>";
582: return $selectdomain;
583: }
584:
1.35 matthew 585: #-------------------------------------------
586:
1.45 matthew 587: =pod
588:
1.52 matthew 589: =item get_library_servers($domain)
1.35 matthew 590:
591: Returns a hash which contains keys like '103l3' and values like
592: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
593: given $domain.
594:
595: =cut
596:
597: #-------------------------------------------
1.52 matthew 598: sub get_library_servers {
1.33 matthew 599: my $domain = shift;
1.52 matthew 600: my %library_servers;
1.33 matthew 601: foreach (keys(%Apache::lonnet::libserv)) {
602: if ($Apache::lonnet::hostdom{$_} eq $domain) {
1.52 matthew 603: $library_servers{$_} = $Apache::lonnet::hostname{$_};
1.33 matthew 604: }
605: }
1.52 matthew 606: return %library_servers;
1.33 matthew 607: }
608:
1.35 matthew 609: #-------------------------------------------
610:
1.45 matthew 611: =pod
612:
1.35 matthew 613: =item home_server_option_list($domain)
614:
615: returns a string which contains an <option> list to be used in a
616: <select> form input. See loncreateuser.pm for an example.
617:
618: =cut
619:
620: #-------------------------------------------
1.33 matthew 621: sub home_server_option_list {
622: my $domain = shift;
1.52 matthew 623: my %servers = &get_library_servers($domain);
1.33 matthew 624: my $result = '';
625: foreach (sort keys(%servers)) {
626: $result.=
627: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
628: }
629: return $result;
630: }
631: ###############################################################
632: ## End of home server <option> list generating code ##
633: ###############################################################
1.32 matthew 634:
635: ###############################################################
636: ## Authentication changing form generation subroutines ##
637: ###############################################################
638: ##
639: ## All of the authform_xxxxxxx subroutines take their inputs in a
640: ## hash, and have reasonable default values.
641: ##
642: ## formname = the name given in the <form> tag.
1.35 matthew 643: #-------------------------------------------
644:
1.45 matthew 645: =pod
646:
1.35 matthew 647: =item authform_xxxxxx
648:
649: The authform_xxxxxx subroutines provide javascript and html forms which
650: handle some of the conveniences required for authentication forms.
651: This is not an optimal method, but it works.
652:
653: See loncreateuser.pm for invocation and use examples.
654:
655: =over 4
656:
657: =item authform_header
658:
659: =item authform_authorwarning
660:
661: =item authform_nochange
662:
663: =item authform_kerberos
664:
665: =item authform_internal
666:
667: =item authform_filesystem
668:
669: =back
670:
671: =cut
672:
673: #-------------------------------------------
1.32 matthew 674: sub authform_header{
675: my %in = (
676: formname => 'cu',
677: kerb_def_dom => 'MSU.EDU',
678: @_,
679: );
680: $in{'formname'} = 'document.' . $in{'formname'};
681: my $result='';
682: $result.=<<"END";
683: var current = new Object();
684: current.radiovalue = 'nochange';
685: current.argfield = null;
686:
687: function changed_radio(choice,currentform) {
688: var choicearg = choice + 'arg';
689: // If a radio button in changed, we need to change the argfield
690: if (current.radiovalue != choice) {
691: current.radiovalue = choice;
692: if (current.argfield != null) {
693: currentform.elements[current.argfield].value = '';
694: }
695: if (choice == 'nochange') {
696: current.argfield = null;
697: } else {
698: current.argfield = choicearg;
699: switch(choice) {
700: case 'krb':
701: currentform.elements[current.argfield].value =
702: "$in{'kerb_def_dom'}";
703: break;
704: default:
705: break;
706: }
707: }
708: }
709: return;
710: }
1.22 www 711:
1.32 matthew 712: function changed_text(choice,currentform) {
713: var choicearg = choice + 'arg';
714: if (currentform.elements[choicearg].value !='') {
715: switch (choice) {
716: case 'krb': currentform.elements[choicearg].value =
717: currentform.elements[choicearg].value.toUpperCase();
718: break;
719: default:
720: }
721: // clear old field
722: if ((current.argfield != choicearg) && (current.argfield != null)) {
723: currentform.elements[current.argfield].value = '';
724: }
725: current.argfield = choicearg;
726: }
727: set_auth_radio_buttons(choice,currentform);
728: return;
1.20 www 729: }
1.32 matthew 730:
731: function set_auth_radio_buttons(newvalue,currentform) {
732: var i=0;
733: while (i < currentform.login.length) {
734: if (currentform.login[i].value == newvalue) { break; }
735: i++;
736: }
737: if (i == currentform.login.length) {
738: return;
739: }
740: current.radiovalue = newvalue;
741: currentform.login[i].checked = true;
742: return;
743: }
744: END
745: return $result;
746: }
747:
748: sub authform_authorwarning{
749: my $result='';
750: $result=<<"END";
751: <i>As a general rule, only authors or co-authors should be filesystem
752: authenticated (which allows access to the server filesystem).</i>
753: END
754: return $result;
755: }
756:
757: sub authform_nochange{
758: my %in = (
759: formname => 'document.cu',
760: kerb_def_dom => 'MSU.EDU',
761: @_,
762: );
763: my $result='';
764: $result.=<<"END";
765: <input type="radio" name="login" value="nochange" checked="checked"
1.57 albertel 766: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
1.32 matthew 767: Do not change login data
768: END
769: return $result;
770: }
771:
772: sub authform_kerberos{
773: my %in = (
774: formname => 'document.cu',
775: kerb_def_dom => 'MSU.EDU',
776: @_,
777: );
778: my $result='';
779: $result.=<<"END";
780: <input type="radio" name="login" value="krb"
781: onclick="javascript:changed_radio('krb',$in{'formname'});"
1.57 albertel 782: onchange="javascript:changed_radio('krb',$in{'formname'});" />
1.32 matthew 783: Kerberos authenticated with domain
784: <input type="text" size="10" name="krbarg" value=""
1.57 albertel 785: onchange="javascript:changed_text('krb',$in{'formname'});" />
1.58 albertel 786: <input type="radio" name="krbver" value="4" checked="on" />Version 4
787: <input type="radio" name="krbver" value="5" />Version 5
1.32 matthew 788: END
789: return $result;
790: }
791:
792: sub authform_internal{
793: my %args = (
794: formname => 'document.cu',
795: kerb_def_dom => 'MSU.EDU',
796: @_,
797: );
798: my $result='';
799: $result.=<<"END";
800: <input type="radio" name="login" value="int"
801: onchange="javascript:changed_radio('int',$args{'formname'});"
1.57 albertel 802: onclick="javascript:changed_radio('int',$args{'formname'});" />
1.32 matthew 803: Internally authenticated (with initial password
804: <input type="text" size="10" name="intarg" value=""
1.57 albertel 805: onchange="javascript:changed_text('int',$args{'formname'});" />
1.32 matthew 806: END
807: return $result;
808: }
809:
810: sub authform_local{
811: my %in = (
812: formname => 'document.cu',
813: kerb_def_dom => 'MSU.EDU',
814: @_,
815: );
816: my $result='';
817: $result.=<<"END";
818: <input type="radio" name="login" value="loc"
819: onchange="javascript:changed_radio('loc',$in{'formname'});"
1.57 albertel 820: onclick="javascript:changed_radio('loc',$in{'formname'});" />
1.32 matthew 821: Local Authentication with argument
822: <input type="text" size="10" name="locarg" value=""
1.57 albertel 823: onchange="javascript:changed_text('loc',$in{'formname'});" />
1.32 matthew 824: END
825: return $result;
826: }
827:
828: sub authform_filesystem{
829: my %in = (
830: formname => 'document.cu',
831: kerb_def_dom => 'MSU.EDU',
832: @_,
833: );
834: my $result='';
835: $result.=<<"END";
836: <input type="radio" name="login" value="fsys"
837: onchange="javascript:changed_radio('fsys',$in{'formname'});"
1.57 albertel 838: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
1.32 matthew 839: Filesystem authenticated (with initial password
840: <input type="text" size="10" name="fsysarg" value=""
841: onchange="javascript:changed_text('fsys',$in{'formname'});">
842: END
843: return $result;
844: }
845:
846: ###############################################################
847: ## End Authentication changing form generation functions ##
848: ###############################################################
849:
1.46 matthew 850: ###############################################################
851: ## Thesaurus Functions ##
852: ###############################################################
1.20 www 853:
1.46 matthew 854: =pod
1.20 www 855:
1.46 matthew 856: =item initialize_keywords
857:
858: Initializes the package variable %Keywords if it is empty. Uses the
859: package variable $thesaurus_db_file.
860:
861: =cut
862:
863: ###################################################
864:
865: sub initialize_keywords {
866: return 1 if (scalar keys(%Keywords));
867: # If we are here, %Keywords is empty, so fill it up
868: # Make sure the file we need exists...
869: if (! -e $thesaurus_db_file) {
870: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
871: " failed because it does not exist");
872: return 0;
873: }
874: # Set up the hash as a database
875: my %thesaurus_db;
876: if (! tie(%thesaurus_db,'GDBM_File',
1.53 albertel 877: $thesaurus_db_file,&GDBM_READER(),0640)){
1.46 matthew 878: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
879: $thesaurus_db_file);
880: return 0;
881: }
882: # Get the average number of appearances of a word.
883: my $avecount = $thesaurus_db{'average.count'};
884: # Put keywords (those that appear > average) into %Keywords
885: while (my ($word,$data)=each (%thesaurus_db)) {
886: my ($count,undef) = split /:/,$data;
887: $Keywords{$word}++ if ($count > $avecount);
888: }
889: untie %thesaurus_db;
890: # Remove special values from %Keywords.
891: foreach ('total.count','average.count') {
892: delete($Keywords{$_}) if (exists($Keywords{$_}));
893: }
894: return 1;
895: }
896:
897: ###################################################
898:
899: =pod
900:
901: =item keyword($word)
902:
903: Returns true if $word is a keyword. A keyword is a word that appears more
904: than the average number of times in the thesaurus database. Calls
905: &initialize_keywords
906:
907: =cut
908:
909: ###################################################
1.20 www 910:
911: sub keyword {
1.46 matthew 912: return if (!&initialize_keywords());
913: my $word=lc(shift());
914: $word=~s/\W//g;
915: return exists($Keywords{$word});
1.20 www 916: }
1.46 matthew 917:
918: ###############################################################
919:
920: =pod
1.20 www 921:
1.46 matthew 922: =item get_related_words
923:
924: Look up a word in the thesaurus. Takes a scalar arguement and returns
925: an array of words. If the keyword is not in the thesaurus, an empty array
926: will be returned. The order of the words returned is determined by the
927: database which holds them.
928:
929: Uses global $thesaurus_db_file.
930:
931: =cut
932:
933: ###############################################################
934: sub get_related_words {
935: my $keyword = shift;
936: my %thesaurus_db;
937: if (! -e $thesaurus_db_file) {
938: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
939: "failed because the file does not exist");
940: return ();
941: }
942: if (! tie(%thesaurus_db,'GDBM_File',
1.53 albertel 943: $thesaurus_db_file,&GDBM_READER(),0640)){
1.46 matthew 944: return ();
945: }
946: my @Words=();
947: if (exists($thesaurus_db{$keyword})) {
948: $_ = $thesaurus_db{$keyword};
949: (undef,@Words) = split/:/; # The first element is the number of times
950: # the word appears. We do not need it now.
951: for (my $i=0;$i<=$#Words;$i++) {
952: ($Words[$i],undef)= split/\,/,$Words[$i];
1.20 www 953: }
954: }
1.46 matthew 955: untie %thesaurus_db;
956: return @Words;
1.14 harris41 957: }
1.46 matthew 958:
959: ###############################################################
960: ## End Thesaurus Functions ##
961: ###############################################################
1.61 www 962:
963: # -------------------------------------------------------------- Plaintext name
964:
965: sub plainname {
966: my ($uname,$udom)=@_;
967: my %names=&Apache::lonnet::get('environment',
968: ['firstname','middlename','lastname','generation'],
969: $udom,$uname);
1.62 www 970: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1.61 www 971: $names{'lastname'}.' '.$names{'generation'};
1.62 www 972: $name=~s/\s+$//;
973: $name=~s/\s+/ /g;
974: return $name;
1.61 www 975: }
976:
977: # ------------------------------------------------------------------ Screenname
978:
979: sub screenname {
980: my ($uname,$udom)=@_;
981: my %names=
982: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
983: return $names{'screenname'};
1.62 www 984: }
985:
986: # ------------------------------------------------------------- Message Wrapper
987:
988: sub messagewrapper {
989: my ($link,$un,$do)=@_;
990: return
991: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
992: }
993: # ------------------------------------------------------------- Aboutme Wrapper
994:
995: sub aboutmewrapper {
996: my ($link,$un,$do)=@_;
997: return "<a href='/adm/$do/$un/aboutme'>$link</a>";
998: }
999:
1000: # ------------------------------------------------------------ Syllabus Wrapper
1001:
1002:
1003: sub syllabuswrapper {
1004: my ($link,$un,$do)=@_;
1005: return "<a href='/public/$do/$un/syllabus'>$link</a>";
1.61 www 1006: }
1.14 harris41 1007:
1008: # ---------------------------------------------------------------- Language IDs
1009: sub languageids {
1.16 harris41 1010: return sort(keys(%language));
1.14 harris41 1011: }
1012:
1013: # -------------------------------------------------------- Language Description
1014: sub languagedescription {
1.16 harris41 1015: return $language{shift(@_)};
1.14 harris41 1016: }
1017:
1018: # --------------------------------------------------------------- Copyright IDs
1019: sub copyrightids {
1.16 harris41 1020: return sort(keys(%cprtag));
1.14 harris41 1021: }
1022:
1023: # ------------------------------------------------------- Copyright Description
1024: sub copyrightdescription {
1.16 harris41 1025: return $cprtag{shift(@_)};
1.14 harris41 1026: }
1027:
1028: # ------------------------------------------------------------- File Categories
1029: sub filecategories {
1.41 ng 1030: return sort(keys(%category_extensions));
1.15 harris41 1031: }
1.14 harris41 1032:
1.17 harris41 1033: # -------------------------------------- File Types within a specified category
1.15 harris41 1034: sub filecategorytypes {
1.41 ng 1035: return @{$category_extensions{lc($_[0])}};
1.14 harris41 1036: }
1037:
1038: # ------------------------------------------------------------------ File Types
1039: sub fileextensions {
1.16 harris41 1040: return sort(keys(%fe));
1.14 harris41 1041: }
1042:
1043: # ------------------------------------------------------------- Embedding Style
1044: sub fileembstyle {
1.16 harris41 1045: return $fe{lc(shift(@_))};
1.14 harris41 1046: }
1047:
1048: # ------------------------------------------------------------ Description Text
1049: sub filedescription {
1.16 harris41 1050: return $fd{lc(shift(@_))};
1051: }
1052:
1053: # ------------------------------------------------------------ Description Text
1054: sub filedescriptionex {
1055: my $ex=shift;
1056: return '.'.$ex.' '.$fd{lc($ex)};
1.12 harris41 1057: }
1.1 albertel 1058:
1.40 ng 1059: # ---- Retrieve attempts by students
1060: # input
1061: # $symb - problem including path
1062: # $username,$domain - that of the student
1063: # $course - course name
1064: # $getattempt - leave blank if want all attempts, else put something.
1.43 ng 1065: # $regexp - regular expression. If string matches regexp send to
1066: # $gradesub - routine that process the string if it matches regexp
1.40 ng 1067: #
1068: # output
1069: # formatted as a table all the attempts, if any.
1070: #
1.1 albertel 1071: sub get_previous_attempt {
1.43 ng 1072: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1.1 albertel 1073: my $prevattempts='';
1.43 ng 1074: no strict 'refs';
1.1 albertel 1075: if ($symb) {
1.3 albertel 1076: my (%returnhash)=
1077: &Apache::lonnet::restore($symb,$course,$domain,$username);
1.1 albertel 1078: if ($returnhash{'version'}) {
1079: my %lasthash=();
1080: my $version;
1081: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.19 harris41 1082: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1.1 albertel 1083: $lasthash{$_}=$returnhash{$version.':'.$_};
1.19 harris41 1084: }
1.1 albertel 1085: }
1.43 ng 1086: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1.40 ng 1087: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1.16 harris41 1088: foreach (sort(keys %lasthash)) {
1.31 albertel 1089: my ($ign,@parts) = split(/\./,$_);
1.41 ng 1090: if ($#parts > 0) {
1.31 albertel 1091: my $data=$parts[-1];
1092: pop(@parts);
1.40 ng 1093: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1.31 albertel 1094: } else {
1.41 ng 1095: if ($#parts == 0) {
1096: $prevattempts.='<th>'.$parts[0].'</th>';
1097: } else {
1098: $prevattempts.='<th>'.$ign.'</th>';
1099: }
1.31 albertel 1100: }
1.16 harris41 1101: }
1.40 ng 1102: if ($getattempt eq '') {
1103: for ($version=1;$version<=$returnhash{'version'};$version++) {
1104: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1105: foreach (sort(keys %lasthash)) {
1106: my $value;
1107: if ($_ =~ /timestamp/) {
1108: $value=scalar(localtime($returnhash{$version.':'.$_}));
1109: } else {
1110: $value=$returnhash{$version.':'.$_};
1111: }
1112: $prevattempts.='<td>'.$value.' </td>';
1113: }
1114: }
1.1 albertel 1115: }
1.40 ng 1116: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1.16 harris41 1117: foreach (sort(keys %lasthash)) {
1.5 albertel 1118: my $value;
1119: if ($_ =~ /timestamp/) {
1120: $value=scalar(localtime($lasthash{$_}));
1121: } else {
1122: $value=$lasthash{$_};
1123: }
1.49 ng 1124: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1.40 ng 1125: $prevattempts.='<td>'.$value.' </td>';
1.16 harris41 1126: }
1.40 ng 1127: $prevattempts.='</tr></table></td></tr></table>';
1.1 albertel 1128: } else {
1129: $prevattempts='Nothing submitted - no attempts.';
1130: }
1131: } else {
1132: $prevattempts='No data.';
1133: }
1.10 albertel 1134: }
1135:
1136: sub get_student_view {
1.64 ! sakharuk 1137: my ($symb,$username,$domain,$courseid,$target) = @_;
1.10 albertel 1138: my ($map,$id,$feedurl) = split(/___/,$symb);
1139: my (%old,%moreenv);
1140: my @elements=('symb','courseid','domain','username');
1141: foreach my $element (@elements) {
1142: $old{$element}=$ENV{'form.grade_'.$element};
1143: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1144: }
1.64 ! sakharuk 1145: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1.11 albertel 1146: &Apache::lonnet::appenv(%moreenv);
1147: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1148: &Apache::lonnet::delenv('form.grade_');
1149: foreach my $element (@elements) {
1150: $ENV{'form.grade_'.$element}=$old{$element};
1151: }
1152: $userview=~s/\<body[^\>]*\>//gi;
1153: $userview=~s/\<\/body\>//gi;
1154: $userview=~s/\<html\>//gi;
1155: $userview=~s/\<\/html\>//gi;
1156: $userview=~s/\<head\>//gi;
1157: $userview=~s/\<\/head\>//gi;
1158: $userview=~s/action\s*\=/would_be_action\=/gi;
1159: return $userview;
1160: }
1161:
1162: sub get_student_answers {
1163: my ($symb,$username,$domain,$courseid) = @_;
1164: my ($map,$id,$feedurl) = split(/___/,$symb);
1165: my (%old,%moreenv);
1166: my @elements=('symb','courseid','domain','username');
1167: foreach my $element (@elements) {
1168: $old{$element}=$ENV{'form.grade_'.$element};
1169: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1170: }
1171: $moreenv{'form.grade_target'}='answer';
1.10 albertel 1172: &Apache::lonnet::appenv(%moreenv);
1173: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1174: &Apache::lonnet::delenv('form.grade_');
1175: foreach my $element (@elements) {
1176: $ENV{'form.grade_'.$element}=$old{$element};
1177: }
1178: return $userview;
1.1 albertel 1179: }
1.37 matthew 1180:
1181: ###############################################
1.51 www 1182:
1183:
1184: sub timehash {
1185: my @ltime=localtime(shift);
1186: return ( 'seconds' => $ltime[0],
1187: 'minutes' => $ltime[1],
1188: 'hours' => $ltime[2],
1189: 'day' => $ltime[3],
1190: 'month' => $ltime[4]+1,
1191: 'year' => $ltime[5]+1900,
1192: 'weekday' => $ltime[6],
1193: 'dayyear' => $ltime[7]+1,
1194: 'dlsav' => $ltime[8] );
1195: }
1196:
1197: sub maketime {
1198: my %th=@_;
1199: return POSIX::mktime(
1200: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1201: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1202: }
1203:
1204:
1205: sub findallcourses {
1206: my %courses=();
1207: my $now=time;
1208: foreach (keys %ENV) {
1209: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1210: my ($starttime,$endtime)=$ENV{$_};
1211: my $active=1;
1212: if ($starttime) {
1213: if ($now<$starttime) { $active=0; }
1214: }
1215: if ($endtime) {
1216: if ($now>$endtime) { $active=0; }
1217: }
1218: if ($active) { $courses{$1.'_'.$2}=1; }
1219: }
1220: }
1221: return keys %courses;
1222: }
1.37 matthew 1223:
1.54 www 1224: ###############################################
1.60 matthew 1225: ###############################################
1226:
1227: =pod
1228:
1.63 www 1229: =item &determinedomain()
1.60 matthew 1230:
1231: Inputs: $domain (usually will be undef)
1232:
1.63 www 1233: Returns: Determines which domain should be used for designs
1.60 matthew 1234:
1235: =cut
1.54 www 1236:
1.60 matthew 1237: ###############################################
1.63 www 1238: sub determinedomain {
1239: my $domain=shift;
1240: if (! $domain) {
1.60 matthew 1241: # Determine domain if we have not been given one
1242: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1243: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1244: if ($ENV{'request.role.domain'}) {
1245: $domain=$ENV{'request.role.domain'};
1246: }
1247: }
1.63 www 1248: return $domain;
1249: }
1250: ###############################################
1251: =pod
1252:
1253: =item &domainlogo()
1254:
1255: Inputs: $domain (usually will be undef)
1256:
1257: Returns: A link to a domain logo, if the domain logo exists.
1258: If the domain logo does not exist, a description of the domain.
1259:
1260: =cut
1261: ###############################################
1262: sub domainlogo {
1263: my $domain = &determinedomain(shift);
1264: # See if there is a logo
1.59 www 1265: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1.60 matthew 1266: return '<img src="/adm/lonDomLogos/'.$domain.'.gif" />';
1267: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1268: return $Apache::lonnet::domaindescription{$domain};
1.59 www 1269: } else {
1.60 matthew 1270: return '';
1.59 www 1271: }
1272: }
1.63 www 1273: ##############################################
1274:
1275: =pod
1276:
1277: =item &designparm()
1278:
1279: Inputs: $which parameter; $domain (usually will be undef)
1280:
1281: Returns: value of designparamter $which
1282:
1283: =cut
1284: ##############################################
1285: sub designparm {
1286: my ($which,$domain)=@_;
1287: $domain=&determinedomain($domain);
1288: if ($designhash{$domain.'.'.$which}) {
1289: return $designhash{$domain.'.'.$which};
1290: } else {
1291: return $designhash{'default.'.$which};
1292: }
1293: }
1.59 www 1294:
1.60 matthew 1295: ###############################################
1296: ###############################################
1297:
1298: =pod
1299:
1300: =item &bodytag()
1301:
1302: Returns a uniform header for LON-CAPA web pages.
1303:
1304: Inputs:
1305:
1306: $title, A title to be displayed on the page.
1307: $function, the current role (can be undef).
1308: $addentries, extra parameters for the <body> tag.
1309: $bodyonly, if defined, only return the <body> tag.
1310: $domain, if defined, force a given domain.
1311:
1312: Returns: A uniform header for LON-CAPA web pages.
1313: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
1314: If $bodyonly is undef or zero, an html string containing a <body> tag and
1315: other decorations will be returned.
1316:
1317: =cut
1318:
1319: ###############################################
1.63 www 1320:
1321:
1.60 matthew 1322: ###############################################
1.54 www 1323: sub bodytag {
1.60 matthew 1324: my ($title,$function,$addentries,$bodyonly,$domain)=@_;
1.55 www 1325: unless ($function) {
1326: $function='student';
1327: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
1328: $function='coordinator';
1329: }
1330: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
1331: $function='admin';
1332: }
1333: if (($ENV{'request.role'}=~/^(au|ca)/) ||
1334: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
1335: $function='author';
1336: }
1337: }
1.63 www 1338: my $img=&designparm($function.'.img',$domain);
1339: my $pgbg=&designparm($function.'.pgbg',$domain);
1340: my $tabbg=&designparm($function.'.tabbg',$domain);
1341: my $font=&designparm($function.'.font',$domain);
1342: my $link=&designparm($function.'.link',$domain);
1343: my $alink=&designparm($function.'.alink',$domain);
1344: my $vlink=&designparm($function.'.vlink',$domain);
1345: my $sidebg=&designparm($function.'.sidebg',$domain);
1346:
1347: # role and realm
1.55 www 1348: my ($role,$realm)
1349: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
1350: # realm
1.54 www 1351: if ($ENV{'request.course.id'}) {
1.55 www 1352: $realm=
1353: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.54 www 1354: }
1.55 www 1355: unless ($realm) { $realm=' '; }
1356: # Set messages
1.60 matthew 1357: my $messages=&domainlogo($domain);
1.55 www 1358: # Output
1.60 matthew 1359: my $bodytag = <<END;
1.54 www 1360: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
1361: $addentries>
1.60 matthew 1362: END
1363: if ($bodyonly) {
1364: return $bodytag;
1365: } else {
1366: return(<<ENDBODY);
1367: $bodytag
1.55 www 1368: <table width="100%" cellspacing="0" border="0" cellpadding="0">
1369: <tr><td bgcolor="$font">
1.63 www 1370: <img src="$img" /></td>
1371: <td bgcolor="$font"><font color='$sidebg'>$messages</font></td>
1.55 www 1372: </tr>
1.54 www 1373: <tr>
1.55 www 1374: <td rowspan="3" bgcolor="$tabbg">
1375: <font size="5"><b>$title</b></font>
1.54 www 1376: <td bgcolor="$tabbg" align="right">
1377: <font size="2">
1378: $ENV{'environment.firstname'}
1379: $ENV{'environment.middlename'}
1380: $ENV{'environment.lastname'}
1381: $ENV{'environment.generation'}
1.55 www 1382: </font>
1.54 www 1383: </td>
1384: </tr>
1385: <tr><td bgcolor="$tabbg" align="right">
1.55 www 1386: <font size="2">$role</font>
1.54 www 1387: </td></tr>
1.55 www 1388: <tr>
1389: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
1.54 www 1390: </table><br>
1391: ENDBODY
1.60 matthew 1392: }
1.54 www 1393: }
1.37 matthew 1394: ###############################################
1.1 albertel 1395:
1.6 albertel 1396: sub get_unprocessed_cgi {
1.25 albertel 1397: my ($query,$possible_names)= @_;
1.26 matthew 1398: # $Apache::lonxml::debug=1;
1.16 harris41 1399: foreach (split(/&/,$query)) {
1.6 albertel 1400: my ($name, $value) = split(/=/,$_);
1.25 albertel 1401: $name = &Apache::lonnet::unescape($name);
1402: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
1403: $value =~ tr/+/ /;
1404: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1405: &Apache::lonxml::debug("Seting :$name: to :$value:");
1.30 albertel 1406: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
1.25 albertel 1407: }
1.16 harris41 1408: }
1.6 albertel 1409: }
1410:
1.7 albertel 1411: sub cacheheader {
1.23 www 1412: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.8 albertel 1413: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.7 albertel 1414: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
1415: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
1416: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
1417: return $output;
1418: }
1419:
1.9 albertel 1420: sub no_cache {
1421: my ($r) = @_;
1.23 www 1422: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.24 albertel 1423: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.9 albertel 1424: $r->no_cache(1);
1425: $r->header_out("Pragma" => "no-cache");
1.24 albertel 1426: #$r->header_out("Expires" => $date);
1.9 albertel 1427: }
1.25 albertel 1428:
1429: sub add_to_env {
1430: my ($name,$value)=@_;
1.28 albertel 1431: if (defined($ENV{$name})) {
1.27 albertel 1432: if (ref($ENV{$name})) {
1.25 albertel 1433: #already have multiple values
1434: push(@{ $ENV{$name} },$value);
1435: } else {
1436: #first time seeing multiple values, convert hash entry to an arrayref
1437: my $first=$ENV{$name};
1438: undef($ENV{$name});
1439: push(@{ $ENV{$name} },$first,$value);
1440: }
1441: } else {
1442: $ENV{$name}=$value;
1443: }
1.31 albertel 1444: }
1445:
1.41 ng 1446: =pod
1.45 matthew 1447:
1448: =back
1.41 ng 1449:
1450: =head2 CSV Upload/Handling functions
1.38 albertel 1451:
1.41 ng 1452: =over 4
1453:
1454: =item upfile_store($r)
1455:
1456: Store uploaded file, $r should be the HTTP Request object,
1457: needs $ENV{'form.upfile'}
1458: returns $datatoken to be put into hidden field
1459:
1460: =cut
1.31 albertel 1461:
1462: sub upfile_store {
1463: my $r=shift;
1464: $ENV{'form.upfile'}=~s/\r/\n/gs;
1465: $ENV{'form.upfile'}=~s/\f/\n/gs;
1466: $ENV{'form.upfile'}=~s/\n+/\n/gs;
1467: $ENV{'form.upfile'}=~s/\n+$//gs;
1468:
1469: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1470: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
1471: {
1472: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
1473: '/tmp/'.$datatoken.'.tmp');
1474: print $fh $ENV{'form.upfile'};
1475: }
1476: return $datatoken;
1477: }
1478:
1.56 matthew 1479: =pod
1480:
1.41 ng 1481: =item load_tmp_file($r)
1482:
1483: Load uploaded file from tmp, $r should be the HTTP Request object,
1484: needs $ENV{'form.datatoken'},
1485: sets $ENV{'form.upfile'} to the contents of the file
1486:
1487: =cut
1.31 albertel 1488:
1489: sub load_tmp_file {
1490: my $r=shift;
1491: my @studentdata=();
1492: {
1493: my $fh;
1494: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
1495: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
1496: @studentdata=<$fh>;
1497: }
1498: }
1499: $ENV{'form.upfile'}=join('',@studentdata);
1500: }
1501:
1.56 matthew 1502: =pod
1503:
1.41 ng 1504: =item upfile_record_sep()
1505:
1506: Separate uploaded file into records
1507: returns array of records,
1508: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
1509:
1510: =cut
1.31 albertel 1511:
1512: sub upfile_record_sep {
1513: if ($ENV{'form.upfiletype'} eq 'xml') {
1514: } else {
1515: return split(/\n/,$ENV{'form.upfile'});
1516: }
1517: }
1518:
1.56 matthew 1519: =pod
1520:
1.41 ng 1521: =item record_sep($record)
1522:
1523: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
1524:
1525: =cut
1526:
1.31 albertel 1527: sub record_sep {
1528: my $record=shift;
1529: my %components=();
1530: if ($ENV{'form.upfiletype'} eq 'xml') {
1531: } elsif ($ENV{'form.upfiletype'} eq 'space') {
1532: my $i=0;
1533: foreach (split(/\s+/,$record)) {
1534: my $field=$_;
1535: $field=~s/^(\"|\')//;
1536: $field=~s/(\"|\')$//;
1537: $components{$i}=$field;
1538: $i++;
1539: }
1540: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
1541: my $i=0;
1542: foreach (split(/\t+/,$record)) {
1543: my $field=$_;
1544: $field=~s/^(\"|\')//;
1545: $field=~s/(\"|\')$//;
1546: $components{$i}=$field;
1547: $i++;
1548: }
1549: } else {
1550: my @allfields=split(/\,/,$record);
1551: my $i=0;
1552: my $j;
1553: for ($j=0;$j<=$#allfields;$j++) {
1554: my $field=$allfields[$j];
1555: if ($field=~/^\s*(\"|\')/) {
1556: my $delimiter=$1;
1557: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
1558: $j++;
1559: $field.=','.$allfields[$j];
1560: }
1561: $field=~s/^\s*$delimiter//;
1562: $field=~s/$delimiter\s*$//;
1563: }
1564: $components{$i}=$field;
1565: $i++;
1566: }
1567: }
1568: return %components;
1569: }
1570:
1.56 matthew 1571: =pod
1572:
1.41 ng 1573: =item upfile_select_html()
1574:
1575: return HTML code to select file and specify its type
1576:
1577: =cut
1578:
1.31 albertel 1579: sub upfile_select_html {
1580: return (<<'ENDUPFORM');
1.57 albertel 1581: <input type="file" name="upfile" size="50" />
1.31 albertel 1582: <br />Type: <select name="upfiletype">
1583: <option value="csv">CSV (comma separated values, spreadsheet)</option>
1584: <option value="space">Space separated</option>
1585: <option value="tab">Tabulator separated</option>
1586: <option value="xml">HTML/XML</option>
1587: </select>
1588: ENDUPFORM
1589: }
1590:
1.56 matthew 1591: =pod
1592:
1.41 ng 1593: =item csv_print_samples($r,$records)
1594:
1595: Prints a table of sample values from each column uploaded $r is an
1596: Apache Request ref, $records is an arrayref from
1597: &Apache::loncommon::upfile_record_sep
1598:
1599: =cut
1600:
1.31 albertel 1601: sub csv_print_samples {
1602: my ($r,$records) = @_;
1603: my (%sone,%stwo,%sthree);
1604: %sone=&record_sep($$records[0]);
1605: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1606: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1607:
1608: $r->print('Samples<br /><table border="2"><tr>');
1609: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
1610: $r->print('</tr>');
1611: foreach my $hash (\%sone,\%stwo,\%sthree) {
1612: $r->print('<tr>');
1613: foreach (sort({$a <=> $b} keys(%sone))) {
1614: $r->print('<td>');
1615: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
1616: $r->print('</td>');
1617: }
1618: $r->print('</tr>');
1619: }
1620: $r->print('</tr></table><br />'."\n");
1621: }
1622:
1.56 matthew 1623: =pod
1624:
1.41 ng 1625: =item csv_print_select_table($r,$records,$d)
1626:
1627: Prints a table to create associations between values and table columns.
1628: $r is an Apache Request ref,
1629: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1630: $d is an array of 2 element arrays (internal name, displayed name)
1631:
1632: =cut
1633:
1.31 albertel 1634: sub csv_print_select_table {
1635: my ($r,$records,$d) = @_;
1636: my $i=0;my %sone;
1637: %sone=&record_sep($$records[0]);
1638: $r->print('Associate columns with student attributes.'."\n".
1639: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
1640: foreach (@$d) {
1641: my ($value,$display)=@{ $_ };
1642: $r->print('<tr><td>'.$display.'</td>');
1643:
1644: $r->print('<td><select name=f'.$i.
1.32 matthew 1645: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1646: $r->print('<option value="none"></option>');
1647: foreach (sort({$a <=> $b} keys(%sone))) {
1648: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
1649: }
1650: $r->print('</select></td></tr>'."\n");
1651: $i++;
1652: }
1653: $i--;
1654: return $i;
1655: }
1.56 matthew 1656:
1657: =pod
1.31 albertel 1658:
1.41 ng 1659: =item csv_samples_select_table($r,$records,$d)
1660:
1661: Prints a table of sample values from the upload and can make associate samples to internal names.
1662:
1663: $r is an Apache Request ref,
1664: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1665: $d is an array of 2 element arrays (internal name, displayed name)
1666:
1667: =cut
1668:
1.31 albertel 1669: sub csv_samples_select_table {
1670: my ($r,$records,$d) = @_;
1671: my %sone; my %stwo; my %sthree;
1672: my $i=0;
1673:
1674: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
1675: %sone=&record_sep($$records[0]);
1676: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1677: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1678:
1679: foreach (sort keys %sone) {
1680: $r->print('<tr><td><select name=f'.$i.
1.32 matthew 1681: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1682: foreach (@$d) {
1683: my ($value,$display)=@{ $_ };
1684: $r->print('<option value='.$value.'>'.$display.'</option>');
1685: }
1686: $r->print('</select></td><td>');
1687: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
1688: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
1689: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
1690: $r->print('</td></tr>');
1691: $i++;
1692: }
1693: $i--;
1694: return($i);
1.25 albertel 1695: }
1.1 albertel 1696: 1;
1697: __END__;
1.17 harris41 1698:
1.41 ng 1699: =pod
1700:
1701: =back
1702:
1703: =head2 Access .tab File Data
1704:
1705: =over 4
1706:
1.35 matthew 1707: =item languageids()
1.17 harris41 1708:
1.35 matthew 1709: returns list of all language ids
1.17 harris41 1710:
1.35 matthew 1711: =item languagedescription()
1.17 harris41 1712:
1.35 matthew 1713: returns description of a specified language id
1.17 harris41 1714:
1.35 matthew 1715: =item copyrightids()
1.17 harris41 1716:
1.35 matthew 1717: returns list of all copyrights
1.17 harris41 1718:
1.35 matthew 1719: =item copyrightdescription()
1.17 harris41 1720:
1.35 matthew 1721: returns description of a specified copyright id
1.17 harris41 1722:
1.35 matthew 1723: =item filecategories()
1.17 harris41 1724:
1.35 matthew 1725: returns list of all file categories
1.17 harris41 1726:
1.35 matthew 1727: =item filecategorytypes()
1.17 harris41 1728:
1.35 matthew 1729: returns list of file types belonging to a given file
1.17 harris41 1730: category
1731:
1.35 matthew 1732: =item fileembstyle()
1.17 harris41 1733:
1.35 matthew 1734: returns embedding style for a specified file type
1.17 harris41 1735:
1.35 matthew 1736: =item filedescription()
1.17 harris41 1737:
1.35 matthew 1738: returns description for a specified file type
1.17 harris41 1739:
1.35 matthew 1740: =item filedescriptionex()
1.17 harris41 1741:
1.35 matthew 1742: returns description for a specified file type with
1.17 harris41 1743: extra formatting
1744:
1.41 ng 1745: =back
1746:
1747: =head2 Alternate Problem Views
1748:
1749: =over 4
1750:
1.35 matthew 1751: =item get_previous_attempt()
1.17 harris41 1752:
1.35 matthew 1753: return string with previous attempt on problem
1.17 harris41 1754:
1.35 matthew 1755: =item get_student_view()
1.17 harris41 1756:
1.35 matthew 1757: show a snapshot of what student was looking at
1.17 harris41 1758:
1.35 matthew 1759: =item get_student_answers()
1.17 harris41 1760:
1.35 matthew 1761: show a snapshot of how student was answering problem
1.17 harris41 1762:
1.41 ng 1763: =back
1764:
1765: =head2 HTTP Helper
1766:
1767: =over 4
1768:
1769: =item get_unprocessed_cgi($query,$possible_names)
1770:
1771: Modify the %ENV hash to contain unprocessed CGI form parameters held in
1772: $query. The parameters listed in $possible_names (an array reference),
1773: will be set in $ENV{'form.name'} if they do not already exist.
1.17 harris41 1774:
1.41 ng 1775: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
1776: $possible_names is an ref to an array of form element names. As an example:
1777: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
1778: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
1.17 harris41 1779:
1.35 matthew 1780: =item cacheheader()
1.17 harris41 1781:
1.35 matthew 1782: returns cache-controlling header code
1.17 harris41 1783:
1.35 matthew 1784: =item nocache()
1.17 harris41 1785:
1.35 matthew 1786: specifies header code to not have cache
1.25 albertel 1787:
1.35 matthew 1788: =item add_to_env($name,$value)
1.25 albertel 1789:
1.35 matthew 1790: adds $name to the %ENV hash with value
1.25 albertel 1791: $value, if $name already exists, the entry is converted to an array
1792: reference and $value is added to the array.
1.17 harris41 1793:
1794: =back
1795:
1796: =cut
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