Annotation of loncom/interface/loncommon.pm, revision 1.50
1.10 albertel 1: # The LearningOnline Network with CAPA
1.1 albertel 2: # a pile of common routines
1.10 albertel 3: #
1.50 ! matthew 4: # $Id: loncommon.pm,v 1.49 2002/08/07 15:39:58 ng 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;
1.8 albertel 83: use POSIX qw(strftime);
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:
1.46 matthew 101: # ---------------------------------------------- Thesaurus variables
102:
103: =pod
104:
105: =item %Keywords
106:
107: A hash used by &keyword to determine if a word is considered a keyword.
108:
109: =item $thesaurus_db_file
110:
111: Scalar containing the full path to the thesaurus database.
112:
113: =cut
114:
115: my %Keywords;
116: my $thesaurus_db_file;
117:
118:
119: =pod
120:
121: =back
122:
123: =cut
1.20 www 124:
1.12 harris41 125: # ----------------------------------------------------------------------- BEGIN
1.41 ng 126:
127: =pod
128:
1.35 matthew 129: =item BEGIN()
130:
131: Initialize values from language.tab, copyright.tab, filetypes.tab,
1.45 matthew 132: thesaurus.tab, and filecategories.tab.
1.35 matthew 133:
134: =cut
1.45 matthew 135:
1.35 matthew 136: # ----------------------------------------------------------------------- BEGIN
137:
1.18 www 138: BEGIN {
1.46 matthew 139: # Variable initialization
140: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
141: #
1.22 www 142: unless ($readit) {
1.12 harris41 143: # ------------------------------------------------------------------- languages
144: {
145: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
146: '/language.tab');
1.16 harris41 147: if ($fh) {
148: while (<$fh>) {
149: next if /^\#/;
150: chomp;
151: my ($key,$val)=(split(/\s+/,$_,2));
152: $language{$key}=$val;
153: }
1.12 harris41 154: }
155: }
156: # ------------------------------------------------------------------ copyrights
157: {
1.16 harris41 158: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
159: '/copyright.tab');
160: if ($fh) {
161: while (<$fh>) {
162: next if /^\#/;
163: chomp;
164: my ($key,$val)=(split(/\s+/,$_,2));
165: $cprtag{$key}=$val;
166: }
1.12 harris41 167: }
168: }
1.15 harris41 169: # ------------------------------------------------------------- file categories
170: {
171: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
1.16 harris41 172: '/filecategories.tab');
173: if ($fh) {
174: while (<$fh>) {
175: next if /^\#/;
176: chomp;
1.41 ng 177: my ($extension,$category)=(split(/\s+/,$_,2));
178: push @{$category_extensions{lc($category)}},$extension;
1.16 harris41 179: }
1.15 harris41 180: }
181: }
1.12 harris41 182: # ------------------------------------------------------------------ file types
183: {
1.16 harris41 184: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
185: '/filetypes.tab');
186: if ($fh) {
187: while (<$fh>) {
188: next if (/^\#/);
189: chomp;
190: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
191: if ($descr ne '') {
192: $fe{$ending}=lc($emb);
193: $fd{$ending}=$descr;
194: }
1.12 harris41 195: }
196: }
197: }
1.22 www 198: &Apache::lonnet::logthis(
1.46 matthew 199: "<font color=yellow>INFO: Read file types</font>");
1.22 www 200: $readit=1;
1.46 matthew 201: } # end of unless($readit)
1.32 matthew 202:
203: }
204: # ============================================================= END BEGIN BLOCK
1.42 matthew 205: ###############################################################
206: ## HTML and Javascript Helper Functions ##
207: ###############################################################
208:
209: =pod
210:
211: =item browser_and_searcher_javascript
212:
213: Returns scalar containing javascript to open a browser window
214: or a searcher window. Also creates
215:
216: =over 4
217:
218: =item openbrowser(formname,elementname,only,omit) [javascript]
219:
220: inputs: formname, elementname, only, omit
221:
222: formname and elementname indicate the name of the html form and name of
223: the element that the results of the browsing selection are to be placed in.
224:
225: Specifying 'only' will restrict the browser to displaying only files
226: with the given extension. Can be a comma seperated list.
227:
228: Specifying 'omit' will restrict the browser to NOT displaying files
229: with the given extension. Can be a comma seperated list.
230:
231: =item opensearcher(formname, elementname) [javascript]
232:
233: Inputs: formname, elementname
234:
235: formname and elementname specify the name of the html form and the name
236: of the element the selection from the search results will be placed in.
237:
238: =back
239:
240: =cut
241:
242: ###############################################################
243: sub browser_and_searcher_javascript {
244: return <<END;
1.50 ! matthew 245: var editbrowser = null;
1.42 matthew 246: function openbrowser(formname,elementname,only,omit) {
247: var url = '/res/?';
248: if (editbrowser == null) {
249: url += 'launch=1&';
250: }
251: url += 'catalogmode=interactive&';
252: url += 'mode=edit&';
253: url += 'form=' + formname + '&';
254: if (only != null) {
255: url += 'only=' + only + '&';
256: }
257: if (omit != null) {
258: url += 'omit=' + omit + '&';
259: }
260: url += 'element=' + elementname + '';
261: var title = 'Browser';
262: var options = 'scrollbars=1,resizable=1,menubar=0';
263: options += ',width=700,height=600';
264: editbrowser = open(url,title,options,'1');
265: editbrowser.focus();
266: }
267: var editsearcher;
268: function opensearcher(formname,elementname) {
269: var url = '/adm/searchcat?';
270: if (editsearcher == null) {
271: url += 'launch=1&';
272: }
273: url += 'catalogmode=interactive&';
274: url += 'mode=edit&';
275: url += 'form=' + formname + '&';
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:
287:
288: ###############################################################
289:
290: =pod
1.36 matthew 291:
292: =item linked_select_forms(...)
293:
294: linked_select_forms returns a string containing a <script></script> block
295: and html for two <select> menus. The select menus will be linked in that
296: changing the value of the first menu will result in new values being placed
297: in the second menu. The values in the select menu will appear in alphabetical
298: order.
299:
300: linked_select_forms takes the following ordered inputs:
301:
302: =over 4
303:
304: =item $formname, the name of the <form> tag
305:
306: =item $middletext, the text which appears between the <select> tags
307:
308: =item $firstdefault, the default value for the first menu
309:
310: =item $firstselectname, the name of the first <select> tag
311:
312: =item $secondselectname, the name of the second <select> tag
313:
314: =item $hashref, a reference to a hash containing the data for the menus.
315:
1.41 ng 316: =back
317:
1.36 matthew 318: Below is an example of such a hash. Only the 'text', 'default', and
319: 'select2' keys must appear as stated. keys(%menu) are the possible
320: values for the first select menu. The text that coincides with the
1.41 ng 321: first menu value is given in $menu{$choice1}->{'text'}. The values
1.36 matthew 322: and text for the second menu are given in the hash pointed to by
323: $menu{$choice1}->{'select2'}.
324:
1.41 ng 325: my %menu = ( A1 => { text =>"Choice A1" ,
1.36 matthew 326: default => "B3",
327: select2 => {
328: B1 => "Choice B1",
329: B2 => "Choice B2",
330: B3 => "Choice B3",
331: B4 => "Choice B4"
332: }
333: },
334: A2 => { text =>"Choice A2" ,
335: default => "C2",
336: select2 => {
337: C1 => "Choice C1",
338: C2 => "Choice C2",
339: C3 => "Choice C3"
340: }
341: },
342: A3 => { text =>"Choice A3" ,
343: default => "D6",
344: select2 => {
345: D1 => "Choice D1",
346: D2 => "Choice D2",
347: D3 => "Choice D3",
348: D4 => "Choice D4",
349: D5 => "Choice D5",
350: D6 => "Choice D6",
351: D7 => "Choice D7"
352: }
353: }
354: );
355:
356: =cut
357:
358: # ------------------------------------------------
359:
360: sub linked_select_forms {
361: my ($formname,
362: $middletext,
363: $firstdefault,
364: $firstselectname,
365: $secondselectname,
366: $hashref
367: ) = @_;
368: my $second = "document.$formname.$secondselectname";
369: my $first = "document.$formname.$firstselectname";
370: # output the javascript to do the changing
371: my $result = '';
372: $result.="<script>\n";
373: $result.="var select2data = new Object();\n";
374: $" = '","';
375: my $debug = '';
376: foreach my $s1 (sort(keys(%$hashref))) {
377: $result.="select2data.d_$s1 = new Object();\n";
378: $result.="select2data.d_$s1.def = new String('".
379: $hashref->{$s1}->{'default'}."');\n";
380: $result.="select2data.d_$s1.values = new Array(";
381: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
382: $result.="\"@s2values\");\n";
383: $result.="select2data.d_$s1.texts = new Array(";
384: my @s2texts;
385: foreach my $value (@s2values) {
386: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
387: }
388: $result.="\"@s2texts\");\n";
389: }
390: $"=' ';
391: $result.= <<"END";
392:
393: function select1_changed() {
394: // Determine new choice
395: var newvalue = "d_" + $first.value;
396: // update select2
397: var values = select2data[newvalue].values;
398: var texts = select2data[newvalue].texts;
399: var select2def = select2data[newvalue].def;
400: var i;
401: // out with the old
402: for (i = 0; i < $second.options.length; i++) {
403: $second.options[i] = null;
404: }
405: // in with the nuclear
406: for (i=0;i<values.length; i++) {
407: $second.options[i] = new Option(values[i]);
408: $second.options[i].text = texts[i];
409: if (values[i] == select2def) {
410: $second.options[i].selected = true;
411: }
412: }
413: }
414: </script>
415: END
416: # output the initial values for the selection lists
417: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
418: foreach my $value (sort(keys(%$hashref))) {
419: $result.=" <option value=\"$value\" ";
420: $result.=" selected=\"true\" " if ($value eq $firstdefault);
421: $result.=">$hashref->{$value}->{'text'}</option>\n";
422: }
423: $result .= "</select>\n";
424: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
425: $result .= $middletext;
426: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
427: my $seconddefault = $hashref->{$firstdefault}->{'default'};
428: foreach my $value (sort(keys(%select2))) {
429: $result.=" <option value=\"$value\" ";
430: $result.=" selected=\"true\" " if ($value eq $seconddefault);
431: $result.=">$select2{$value}</option>\n";
432: }
433: $result .= "</select>\n";
434: # return $debug;
435: return $result;
436: } # end of sub linked_select_forms {
437:
1.33 matthew 438: ###############################################################
1.44 bowersj2 439:
1.45 matthew 440: =pod
1.44 bowersj2 441:
1.48 bowersj2 442: =item help_open_topic($topic, $text, $stayOnPage, $width, $height)
1.44 bowersj2 443:
444: 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.
445:
1.48 bowersj2 446: $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.
447:
1.44 bowersj2 448: $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.)
449:
450: $width and $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.
451:
452: =cut
453:
454: sub help_open_topic {
1.48 bowersj2 455: my ($topic, $text, $stayOnPage, $width, $height) = @_;
456: $text = "" if (not defined $text);
1.44 bowersj2 457: $stayOnPage = 0 if (not defined $stayOnPage);
458: $width = 350 if (not defined $width);
459: $height = 400 if (not defined $height);
460: my $filename = $topic;
461: $filename =~ s/ /_/g;
462:
1.48 bowersj2 463: my $template = "";
464: my $link;
1.44 bowersj2 465:
466: if (!$stayOnPage)
467: {
1.48 bowersj2 468: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height'))";
1.44 bowersj2 469: }
470: else
471: {
1.48 bowersj2 472: $link = "/adm/help/${filename}.hlp";
473: }
474:
475: # Add the text
476: if ($text ne "")
477: {
478: $template .= "<a href=\"$link\">$text</a> ";
479: }
480:
481: # Add the graphic
482: $template .= <<"ENDTEMPLATE";
483: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)"></a>
1.44 bowersj2 484: ENDTEMPLATE
485:
486: return $template;
487:
488: }
1.37 matthew 489:
1.45 matthew 490: =pod
491:
1.37 matthew 492: =item csv_translate($text)
493:
494: Translate $text to allow it to be output as a 'comma seperated values'
495: format.
496:
497: =cut
498:
499: sub csv_translate {
500: my $text = shift;
501: $text =~ s/\"/\"\"/g;
502: $text =~ s/\n//g;
503: return $text;
504: }
505:
506: ###############################################################
1.33 matthew 507: ## Home server <option> list generating code ##
508: ###############################################################
1.35 matthew 509: #-------------------------------------------
510:
1.45 matthew 511: =pod
512:
1.35 matthew 513: =item get_domains()
514:
515: Returns an array containing each of the domains listed in the hosts.tab
516: file.
517:
518: =cut
519:
520: #-------------------------------------------
1.34 matthew 521: sub get_domains {
522: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
523: my @domains;
524: my %seen;
525: foreach (sort values(%Apache::lonnet::hostdom)) {
526: push (@domains,$_) unless $seen{$_}++;
527: }
528: return @domains;
529: }
530:
1.35 matthew 531: #-------------------------------------------
532:
1.45 matthew 533: =pod
534:
1.35 matthew 535: =item select_dom_form($defdom,$name)
536:
537: Returns a string containing a <select name='$name' size='1'> form to
538: allow a user to select the domain to preform an operation in.
539: See loncreateuser.pm for an example invocation and use.
540:
541: =cut
542:
543: #-------------------------------------------
1.34 matthew 544: sub select_dom_form {
545: my ($defdom,$name) = @_;
546: my @domains = get_domains();
547: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
548: foreach (@domains) {
549: $selectdomain.="<option value=\"$_\" ".
550: ($_ eq $defdom ? 'selected' : '').
551: ">$_</option>\n";
552: }
553: $selectdomain.="</select>";
554: return $selectdomain;
555: }
556:
1.35 matthew 557: #-------------------------------------------
558:
1.45 matthew 559: =pod
560:
1.35 matthew 561: =item get_home_servers($domain)
562:
563: Returns a hash which contains keys like '103l3' and values like
564: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
565: given $domain.
566:
567: =cut
568:
569: #-------------------------------------------
1.33 matthew 570: sub get_home_servers {
571: my $domain = shift;
572: my %home_servers;
573: foreach (keys(%Apache::lonnet::libserv)) {
574: if ($Apache::lonnet::hostdom{$_} eq $domain) {
575: $home_servers{$_} = $Apache::lonnet::hostname{$_};
576: }
577: }
578: return %home_servers;
579: }
580:
1.35 matthew 581: #-------------------------------------------
582:
1.45 matthew 583: =pod
584:
1.35 matthew 585: =item home_server_option_list($domain)
586:
587: returns a string which contains an <option> list to be used in a
588: <select> form input. See loncreateuser.pm for an example.
589:
590: =cut
591:
592: #-------------------------------------------
1.33 matthew 593: sub home_server_option_list {
594: my $domain = shift;
595: my %servers = &get_home_servers($domain);
596: my $result = '';
597: foreach (sort keys(%servers)) {
598: $result.=
599: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
600: }
601: return $result;
602: }
603: ###############################################################
604: ## End of home server <option> list generating code ##
605: ###############################################################
1.32 matthew 606:
607: ###############################################################
608: ## Authentication changing form generation subroutines ##
609: ###############################################################
610: ##
611: ## All of the authform_xxxxxxx subroutines take their inputs in a
612: ## hash, and have reasonable default values.
613: ##
614: ## formname = the name given in the <form> tag.
1.35 matthew 615: #-------------------------------------------
616:
1.45 matthew 617: =pod
618:
1.35 matthew 619: =item authform_xxxxxx
620:
621: The authform_xxxxxx subroutines provide javascript and html forms which
622: handle some of the conveniences required for authentication forms.
623: This is not an optimal method, but it works.
624:
625: See loncreateuser.pm for invocation and use examples.
626:
627: =over 4
628:
629: =item authform_header
630:
631: =item authform_authorwarning
632:
633: =item authform_nochange
634:
635: =item authform_kerberos
636:
637: =item authform_internal
638:
639: =item authform_filesystem
640:
641: =back
642:
643: =cut
644:
645: #-------------------------------------------
1.32 matthew 646: sub authform_header{
647: my %in = (
648: formname => 'cu',
649: kerb_def_dom => 'MSU.EDU',
650: @_,
651: );
652: $in{'formname'} = 'document.' . $in{'formname'};
653: my $result='';
654: $result.=<<"END";
655: var current = new Object();
656: current.radiovalue = 'nochange';
657: current.argfield = null;
658:
659: function changed_radio(choice,currentform) {
660: var choicearg = choice + 'arg';
661: // If a radio button in changed, we need to change the argfield
662: if (current.radiovalue != choice) {
663: current.radiovalue = choice;
664: if (current.argfield != null) {
665: currentform.elements[current.argfield].value = '';
666: }
667: if (choice == 'nochange') {
668: current.argfield = null;
669: } else {
670: current.argfield = choicearg;
671: switch(choice) {
672: case 'krb':
673: currentform.elements[current.argfield].value =
674: "$in{'kerb_def_dom'}";
675: break;
676: default:
677: break;
678: }
679: }
680: }
681: return;
682: }
1.22 www 683:
1.32 matthew 684: function changed_text(choice,currentform) {
685: var choicearg = choice + 'arg';
686: if (currentform.elements[choicearg].value !='') {
687: switch (choice) {
688: case 'krb': currentform.elements[choicearg].value =
689: currentform.elements[choicearg].value.toUpperCase();
690: break;
691: default:
692: }
693: // clear old field
694: if ((current.argfield != choicearg) && (current.argfield != null)) {
695: currentform.elements[current.argfield].value = '';
696: }
697: current.argfield = choicearg;
698: }
699: set_auth_radio_buttons(choice,currentform);
700: return;
1.20 www 701: }
1.32 matthew 702:
703: function set_auth_radio_buttons(newvalue,currentform) {
704: var i=0;
705: while (i < currentform.login.length) {
706: if (currentform.login[i].value == newvalue) { break; }
707: i++;
708: }
709: if (i == currentform.login.length) {
710: return;
711: }
712: current.radiovalue = newvalue;
713: currentform.login[i].checked = true;
714: return;
715: }
716: END
717: return $result;
718: }
719:
720: sub authform_authorwarning{
721: my $result='';
722: $result=<<"END";
723: <i>As a general rule, only authors or co-authors should be filesystem
724: authenticated (which allows access to the server filesystem).</i>
725: END
726: return $result;
727: }
728:
729: sub authform_nochange{
730: my %in = (
731: formname => 'document.cu',
732: kerb_def_dom => 'MSU.EDU',
733: @_,
734: );
735: my $result='';
736: $result.=<<"END";
737: <input type="radio" name="login" value="nochange" checked="checked"
738: onclick="javascript:changed_radio('nochange',$in{'formname'});">
739: Do not change login data
740: END
741: return $result;
742: }
743:
744: sub authform_kerberos{
745: my %in = (
746: formname => 'document.cu',
747: kerb_def_dom => 'MSU.EDU',
748: @_,
749: );
750: my $result='';
751: $result.=<<"END";
752: <input type="radio" name="login" value="krb"
753: onclick="javascript:changed_radio('krb',$in{'formname'});"
754: onchange="javascript:changed_radio('krb',$in{'formname'});">
755: Kerberos authenticated with domain
756: <input type="text" size="10" name="krbarg" value=""
757: onchange="javascript:changed_text('krb',$in{'formname'});">
758: END
759: return $result;
760: }
761:
762: sub authform_internal{
763: my %args = (
764: formname => 'document.cu',
765: kerb_def_dom => 'MSU.EDU',
766: @_,
767: );
768: my $result='';
769: $result.=<<"END";
770: <input type="radio" name="login" value="int"
771: onchange="javascript:changed_radio('int',$args{'formname'});"
772: onclick="javascript:changed_radio('int',$args{'formname'});">
773: Internally authenticated (with initial password
774: <input type="text" size="10" name="intarg" value=""
775: onchange="javascript:changed_text('int',$args{'formname'});">
776: END
777: return $result;
778: }
779:
780: sub authform_local{
781: my %in = (
782: formname => 'document.cu',
783: kerb_def_dom => 'MSU.EDU',
784: @_,
785: );
786: my $result='';
787: $result.=<<"END";
788: <input type="radio" name="login" value="loc"
789: onchange="javascript:changed_radio('loc',$in{'formname'});"
790: onclick="javascript:changed_radio('loc',$in{'formname'});">
791: Local Authentication with argument
792: <input type="text" size="10" name="locarg" value=""
793: onchange="javascript:changed_text('loc',$in{'formname'});">
794: END
795: return $result;
796: }
797:
798: sub authform_filesystem{
799: my %in = (
800: formname => 'document.cu',
801: kerb_def_dom => 'MSU.EDU',
802: @_,
803: );
804: my $result='';
805: $result.=<<"END";
806: <input type="radio" name="login" value="fsys"
807: onchange="javascript:changed_radio('fsys',$in{'formname'});"
808: onclick="javascript:changed_radio('fsys',$in{'formname'});">
809: Filesystem authenticated (with initial password
810: <input type="text" size="10" name="fsysarg" value=""
811: onchange="javascript:changed_text('fsys',$in{'formname'});">
812: END
813: return $result;
814: }
815:
816: ###############################################################
817: ## End Authentication changing form generation functions ##
818: ###############################################################
819:
1.46 matthew 820: ###############################################################
821: ## Thesaurus Functions ##
822: ###############################################################
1.20 www 823:
1.46 matthew 824: =pod
1.20 www 825:
1.46 matthew 826: =item initialize_keywords
827:
828: Initializes the package variable %Keywords if it is empty. Uses the
829: package variable $thesaurus_db_file.
830:
831: =cut
832:
833: ###################################################
834:
835: sub initialize_keywords {
836: return 1 if (scalar keys(%Keywords));
837: # If we are here, %Keywords is empty, so fill it up
838: # Make sure the file we need exists...
839: if (! -e $thesaurus_db_file) {
840: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
841: " failed because it does not exist");
842: return 0;
843: }
844: # Set up the hash as a database
845: my %thesaurus_db;
846: if (! tie(%thesaurus_db,'GDBM_File',
847: $thesaurus_db_file,&GDBM_READER,0640)){
848: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
849: $thesaurus_db_file);
850: return 0;
851: }
852: # Get the average number of appearances of a word.
853: my $avecount = $thesaurus_db{'average.count'};
854: # Put keywords (those that appear > average) into %Keywords
855: while (my ($word,$data)=each (%thesaurus_db)) {
856: my ($count,undef) = split /:/,$data;
857: $Keywords{$word}++ if ($count > $avecount);
858: }
859: untie %thesaurus_db;
860: # Remove special values from %Keywords.
861: foreach ('total.count','average.count') {
862: delete($Keywords{$_}) if (exists($Keywords{$_}));
863: }
864: return 1;
865: }
866:
867: ###################################################
868:
869: =pod
870:
871: =item keyword($word)
872:
873: Returns true if $word is a keyword. A keyword is a word that appears more
874: than the average number of times in the thesaurus database. Calls
875: &initialize_keywords
876:
877: =cut
878:
879: ###################################################
1.20 www 880:
881: sub keyword {
1.46 matthew 882: return if (!&initialize_keywords());
883: my $word=lc(shift());
884: $word=~s/\W//g;
885: return exists($Keywords{$word});
1.20 www 886: }
1.46 matthew 887:
888: ###################################################
889: # Old code, to be removed soon #
890: ###################################################
1.20 www 891: # -------------------------------------------------------- Return related words
1.46 matthew 892: #sub related {
893: # my $newword=shift;
894: # $newword=~s/\W//g;
895: # $newword=~tr/A-Z/a-z/;
896: # my $tindex=$theindex{$newword};
897: # if ($tindex) {
898: # my %found=();
899: # foreach (split(/\,/,$therelated[$tindex])) {
900: ## - Related word found
901: # my ($ridx,$rcount)=split(/\:/,$_);
902: ## - Direct relation index
903: # my $directrel=$rcount/$thecount[$tindex];
904: # if ($directrel>$thethreshold) {
905: # foreach (split(/\,/,$therelated[$ridx])) {
906: # my ($rridx,$rrcount)=split(/\:/,$_);
907: # if ($rridx==$tindex) {
908: ## - Determine reverse relation index
909: # my $revrel=$rrcount/$thecount[$ridx];
910: ## - Calculate full index
911: # $found{$ridx}=$directrel*$revrel;
912: # if ($found{$ridx}>$thethreshold) {
913: # foreach (split(/\,/,$therelated[$ridx])) {
914: # my ($rrridx,$rrrcount)=split(/\:/,$_);
915: # unless ($found{$rrridx}) {
916: # my $revrevrel=$rrrcount/$thecount[$ridx];
917: # if (
918: # $directrel*$revrel*$revrevrel>$thethreshold
919: # ) {
920: # $found{$rrridx}=
921: # $directrel*$revrel*$revrevrel;
922: # }
923: # }
924: # }
925: # }
926: # }
927: # }
928: # }
929: # }
930: # }
931: # return ();
932: #}
933:
934: ###############################################################
935:
936: =pod
1.20 www 937:
1.46 matthew 938: =item get_related_words
939:
940: Look up a word in the thesaurus. Takes a scalar arguement and returns
941: an array of words. If the keyword is not in the thesaurus, an empty array
942: will be returned. The order of the words returned is determined by the
943: database which holds them.
944:
945: Uses global $thesaurus_db_file.
946:
947: =cut
948:
949: ###############################################################
950:
951: sub get_related_words {
952: my $keyword = shift;
953: my %thesaurus_db;
954: if (! -e $thesaurus_db_file) {
955: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
956: "failed because the file does not exist");
957: return ();
958: }
959: if (! tie(%thesaurus_db,'GDBM_File',
960: $thesaurus_db_file,&GDBM_READER,0640)){
961: return ();
962: }
963: my @Words=();
964: if (exists($thesaurus_db{$keyword})) {
965: $_ = $thesaurus_db{$keyword};
966: (undef,@Words) = split/:/; # The first element is the number of times
967: # the word appears. We do not need it now.
968: for (my $i=0;$i<=$#Words;$i++) {
969: ($Words[$i],undef)= split/\,/,$Words[$i];
1.20 www 970: }
971: }
1.46 matthew 972: untie %thesaurus_db;
973: return @Words;
1.14 harris41 974: }
1.46 matthew 975:
976: ###############################################################
977: ## End Thesaurus Functions ##
978: ###############################################################
1.14 harris41 979:
980: # ---------------------------------------------------------------- Language IDs
981: sub languageids {
1.16 harris41 982: return sort(keys(%language));
1.14 harris41 983: }
984:
985: # -------------------------------------------------------- Language Description
986: sub languagedescription {
1.16 harris41 987: return $language{shift(@_)};
1.14 harris41 988: }
989:
990: # --------------------------------------------------------------- Copyright IDs
991: sub copyrightids {
1.16 harris41 992: return sort(keys(%cprtag));
1.14 harris41 993: }
994:
995: # ------------------------------------------------------- Copyright Description
996: sub copyrightdescription {
1.16 harris41 997: return $cprtag{shift(@_)};
1.14 harris41 998: }
999:
1000: # ------------------------------------------------------------- File Categories
1001: sub filecategories {
1.41 ng 1002: return sort(keys(%category_extensions));
1.15 harris41 1003: }
1.14 harris41 1004:
1.17 harris41 1005: # -------------------------------------- File Types within a specified category
1.15 harris41 1006: sub filecategorytypes {
1.41 ng 1007: return @{$category_extensions{lc($_[0])}};
1.14 harris41 1008: }
1009:
1010: # ------------------------------------------------------------------ File Types
1011: sub fileextensions {
1.16 harris41 1012: return sort(keys(%fe));
1.14 harris41 1013: }
1014:
1015: # ------------------------------------------------------------- Embedding Style
1016: sub fileembstyle {
1.16 harris41 1017: return $fe{lc(shift(@_))};
1.14 harris41 1018: }
1019:
1020: # ------------------------------------------------------------ Description Text
1021: sub filedescription {
1.16 harris41 1022: return $fd{lc(shift(@_))};
1023: }
1024:
1025: # ------------------------------------------------------------ Description Text
1026: sub filedescriptionex {
1027: my $ex=shift;
1028: return '.'.$ex.' '.$fd{lc($ex)};
1.12 harris41 1029: }
1.1 albertel 1030:
1.40 ng 1031: # ---- Retrieve attempts by students
1032: # input
1033: # $symb - problem including path
1034: # $username,$domain - that of the student
1035: # $course - course name
1036: # $getattempt - leave blank if want all attempts, else put something.
1.43 ng 1037: # $regexp - regular expression. If string matches regexp send to
1038: # $gradesub - routine that process the string if it matches regexp
1.40 ng 1039: #
1040: # output
1041: # formatted as a table all the attempts, if any.
1042: #
1.1 albertel 1043: sub get_previous_attempt {
1.43 ng 1044: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1.1 albertel 1045: my $prevattempts='';
1.43 ng 1046: no strict 'refs';
1.1 albertel 1047: if ($symb) {
1.3 albertel 1048: my (%returnhash)=
1049: &Apache::lonnet::restore($symb,$course,$domain,$username);
1.1 albertel 1050: if ($returnhash{'version'}) {
1051: my %lasthash=();
1052: my $version;
1053: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.19 harris41 1054: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1.1 albertel 1055: $lasthash{$_}=$returnhash{$version.':'.$_};
1.19 harris41 1056: }
1.1 albertel 1057: }
1.43 ng 1058: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1.40 ng 1059: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1.16 harris41 1060: foreach (sort(keys %lasthash)) {
1.31 albertel 1061: my ($ign,@parts) = split(/\./,$_);
1.41 ng 1062: if ($#parts > 0) {
1.31 albertel 1063: my $data=$parts[-1];
1064: pop(@parts);
1.40 ng 1065: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1.31 albertel 1066: } else {
1.41 ng 1067: if ($#parts == 0) {
1068: $prevattempts.='<th>'.$parts[0].'</th>';
1069: } else {
1070: $prevattempts.='<th>'.$ign.'</th>';
1071: }
1.31 albertel 1072: }
1.16 harris41 1073: }
1.40 ng 1074: if ($getattempt eq '') {
1075: for ($version=1;$version<=$returnhash{'version'};$version++) {
1076: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1077: foreach (sort(keys %lasthash)) {
1078: my $value;
1079: if ($_ =~ /timestamp/) {
1080: $value=scalar(localtime($returnhash{$version.':'.$_}));
1081: } else {
1082: $value=$returnhash{$version.':'.$_};
1083: }
1084: $prevattempts.='<td>'.$value.' </td>';
1085: }
1086: }
1.1 albertel 1087: }
1.40 ng 1088: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1.16 harris41 1089: foreach (sort(keys %lasthash)) {
1.5 albertel 1090: my $value;
1091: if ($_ =~ /timestamp/) {
1092: $value=scalar(localtime($lasthash{$_}));
1093: } else {
1094: $value=$lasthash{$_};
1095: }
1.49 ng 1096: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1.40 ng 1097: $prevattempts.='<td>'.$value.' </td>';
1.16 harris41 1098: }
1.40 ng 1099: $prevattempts.='</tr></table></td></tr></table>';
1.1 albertel 1100: } else {
1101: $prevattempts='Nothing submitted - no attempts.';
1102: }
1103: } else {
1104: $prevattempts='No data.';
1105: }
1.10 albertel 1106: }
1107:
1108: sub get_student_view {
1109: my ($symb,$username,$domain,$courseid) = @_;
1110: my ($map,$id,$feedurl) = split(/___/,$symb);
1111: my (%old,%moreenv);
1112: my @elements=('symb','courseid','domain','username');
1113: foreach my $element (@elements) {
1114: $old{$element}=$ENV{'form.grade_'.$element};
1115: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1116: }
1.11 albertel 1117: &Apache::lonnet::appenv(%moreenv);
1118: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1119: &Apache::lonnet::delenv('form.grade_');
1120: foreach my $element (@elements) {
1121: $ENV{'form.grade_'.$element}=$old{$element};
1122: }
1123: $userview=~s/\<body[^\>]*\>//gi;
1124: $userview=~s/\<\/body\>//gi;
1125: $userview=~s/\<html\>//gi;
1126: $userview=~s/\<\/html\>//gi;
1127: $userview=~s/\<head\>//gi;
1128: $userview=~s/\<\/head\>//gi;
1129: $userview=~s/action\s*\=/would_be_action\=/gi;
1130: return $userview;
1131: }
1132:
1133: sub get_student_answers {
1134: my ($symb,$username,$domain,$courseid) = @_;
1135: my ($map,$id,$feedurl) = split(/___/,$symb);
1136: my (%old,%moreenv);
1137: my @elements=('symb','courseid','domain','username');
1138: foreach my $element (@elements) {
1139: $old{$element}=$ENV{'form.grade_'.$element};
1140: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1141: }
1142: $moreenv{'form.grade_target'}='answer';
1.10 albertel 1143: &Apache::lonnet::appenv(%moreenv);
1144: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1145: &Apache::lonnet::delenv('form.grade_');
1146: foreach my $element (@elements) {
1147: $ENV{'form.grade_'.$element}=$old{$element};
1148: }
1149: return $userview;
1.1 albertel 1150: }
1.37 matthew 1151:
1152: ###############################################
1153:
1154: ###############################################
1.1 albertel 1155:
1.6 albertel 1156: sub get_unprocessed_cgi {
1.25 albertel 1157: my ($query,$possible_names)= @_;
1.26 matthew 1158: # $Apache::lonxml::debug=1;
1.16 harris41 1159: foreach (split(/&/,$query)) {
1.6 albertel 1160: my ($name, $value) = split(/=/,$_);
1.25 albertel 1161: $name = &Apache::lonnet::unescape($name);
1162: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
1163: $value =~ tr/+/ /;
1164: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1165: &Apache::lonxml::debug("Seting :$name: to :$value:");
1.30 albertel 1166: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
1.25 albertel 1167: }
1.16 harris41 1168: }
1.6 albertel 1169: }
1170:
1.7 albertel 1171: sub cacheheader {
1.23 www 1172: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.8 albertel 1173: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.7 albertel 1174: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
1175: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
1176: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
1177: return $output;
1178: }
1179:
1.9 albertel 1180: sub no_cache {
1181: my ($r) = @_;
1.23 www 1182: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1.24 albertel 1183: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1.9 albertel 1184: $r->no_cache(1);
1185: $r->header_out("Pragma" => "no-cache");
1.24 albertel 1186: #$r->header_out("Expires" => $date);
1.9 albertel 1187: }
1.25 albertel 1188:
1189: sub add_to_env {
1190: my ($name,$value)=@_;
1.28 albertel 1191: if (defined($ENV{$name})) {
1.27 albertel 1192: if (ref($ENV{$name})) {
1.25 albertel 1193: #already have multiple values
1194: push(@{ $ENV{$name} },$value);
1195: } else {
1196: #first time seeing multiple values, convert hash entry to an arrayref
1197: my $first=$ENV{$name};
1198: undef($ENV{$name});
1199: push(@{ $ENV{$name} },$first,$value);
1200: }
1201: } else {
1202: $ENV{$name}=$value;
1203: }
1.31 albertel 1204: }
1205:
1.41 ng 1206: =pod
1.45 matthew 1207:
1208: =back
1.41 ng 1209:
1210: =head2 CSV Upload/Handling functions
1.38 albertel 1211:
1.41 ng 1212: =over 4
1213:
1214: =item upfile_store($r)
1215:
1216: Store uploaded file, $r should be the HTTP Request object,
1217: needs $ENV{'form.upfile'}
1218: returns $datatoken to be put into hidden field
1219:
1220: =cut
1.31 albertel 1221:
1222: sub upfile_store {
1223: my $r=shift;
1224: $ENV{'form.upfile'}=~s/\r/\n/gs;
1225: $ENV{'form.upfile'}=~s/\f/\n/gs;
1226: $ENV{'form.upfile'}=~s/\n+/\n/gs;
1227: $ENV{'form.upfile'}=~s/\n+$//gs;
1228:
1229: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1230: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
1231: {
1232: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
1233: '/tmp/'.$datatoken.'.tmp');
1234: print $fh $ENV{'form.upfile'};
1235: }
1236: return $datatoken;
1237: }
1238:
1.41 ng 1239: =item load_tmp_file($r)
1240:
1241: Load uploaded file from tmp, $r should be the HTTP Request object,
1242: needs $ENV{'form.datatoken'},
1243: sets $ENV{'form.upfile'} to the contents of the file
1244:
1245: =cut
1.31 albertel 1246:
1247: sub load_tmp_file {
1248: my $r=shift;
1249: my @studentdata=();
1250: {
1251: my $fh;
1252: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
1253: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
1254: @studentdata=<$fh>;
1255: }
1256: }
1257: $ENV{'form.upfile'}=join('',@studentdata);
1258: }
1259:
1.41 ng 1260: =item upfile_record_sep()
1261:
1262: Separate uploaded file into records
1263: returns array of records,
1264: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
1265:
1266: =cut
1.31 albertel 1267:
1268: sub upfile_record_sep {
1269: if ($ENV{'form.upfiletype'} eq 'xml') {
1270: } else {
1271: return split(/\n/,$ENV{'form.upfile'});
1272: }
1273: }
1274:
1.41 ng 1275: =item record_sep($record)
1276:
1277: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
1278:
1279: =cut
1280:
1.31 albertel 1281: sub record_sep {
1282: my $record=shift;
1283: my %components=();
1284: if ($ENV{'form.upfiletype'} eq 'xml') {
1285: } elsif ($ENV{'form.upfiletype'} eq 'space') {
1286: my $i=0;
1287: foreach (split(/\s+/,$record)) {
1288: my $field=$_;
1289: $field=~s/^(\"|\')//;
1290: $field=~s/(\"|\')$//;
1291: $components{$i}=$field;
1292: $i++;
1293: }
1294: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
1295: my $i=0;
1296: foreach (split(/\t+/,$record)) {
1297: my $field=$_;
1298: $field=~s/^(\"|\')//;
1299: $field=~s/(\"|\')$//;
1300: $components{$i}=$field;
1301: $i++;
1302: }
1303: } else {
1304: my @allfields=split(/\,/,$record);
1305: my $i=0;
1306: my $j;
1307: for ($j=0;$j<=$#allfields;$j++) {
1308: my $field=$allfields[$j];
1309: if ($field=~/^\s*(\"|\')/) {
1310: my $delimiter=$1;
1311: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
1312: $j++;
1313: $field.=','.$allfields[$j];
1314: }
1315: $field=~s/^\s*$delimiter//;
1316: $field=~s/$delimiter\s*$//;
1317: }
1318: $components{$i}=$field;
1319: $i++;
1320: }
1321: }
1322: return %components;
1323: }
1324:
1.41 ng 1325: =item upfile_select_html()
1326:
1327: return HTML code to select file and specify its type
1328:
1329: =cut
1330:
1.31 albertel 1331: sub upfile_select_html {
1332: return (<<'ENDUPFORM');
1333: <input type="file" name="upfile" size="50">
1334: <br />Type: <select name="upfiletype">
1335: <option value="csv">CSV (comma separated values, spreadsheet)</option>
1336: <option value="space">Space separated</option>
1337: <option value="tab">Tabulator separated</option>
1338: <option value="xml">HTML/XML</option>
1339: </select>
1340: ENDUPFORM
1341: }
1342:
1.41 ng 1343: =item csv_print_samples($r,$records)
1344:
1345: Prints a table of sample values from each column uploaded $r is an
1346: Apache Request ref, $records is an arrayref from
1347: &Apache::loncommon::upfile_record_sep
1348:
1349: =cut
1350:
1.31 albertel 1351: sub csv_print_samples {
1352: my ($r,$records) = @_;
1353: my (%sone,%stwo,%sthree);
1354: %sone=&record_sep($$records[0]);
1355: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1356: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1357:
1358: $r->print('Samples<br /><table border="2"><tr>');
1359: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
1360: $r->print('</tr>');
1361: foreach my $hash (\%sone,\%stwo,\%sthree) {
1362: $r->print('<tr>');
1363: foreach (sort({$a <=> $b} keys(%sone))) {
1364: $r->print('<td>');
1365: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
1366: $r->print('</td>');
1367: }
1368: $r->print('</tr>');
1369: }
1370: $r->print('</tr></table><br />'."\n");
1371: }
1372:
1.41 ng 1373: =item csv_print_select_table($r,$records,$d)
1374:
1375: Prints a table to create associations between values and table columns.
1376: $r is an Apache Request ref,
1377: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1378: $d is an array of 2 element arrays (internal name, displayed name)
1379:
1380: =cut
1381:
1.31 albertel 1382: sub csv_print_select_table {
1383: my ($r,$records,$d) = @_;
1384: my $i=0;my %sone;
1385: %sone=&record_sep($$records[0]);
1386: $r->print('Associate columns with student attributes.'."\n".
1387: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
1388: foreach (@$d) {
1389: my ($value,$display)=@{ $_ };
1390: $r->print('<tr><td>'.$display.'</td>');
1391:
1392: $r->print('<td><select name=f'.$i.
1.32 matthew 1393: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1394: $r->print('<option value="none"></option>');
1395: foreach (sort({$a <=> $b} keys(%sone))) {
1396: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
1397: }
1398: $r->print('</select></td></tr>'."\n");
1399: $i++;
1400: }
1401: $i--;
1402: return $i;
1403: }
1404:
1.41 ng 1405: =item csv_samples_select_table($r,$records,$d)
1406:
1407: Prints a table of sample values from the upload and can make associate samples to internal names.
1408:
1409: $r is an Apache Request ref,
1410: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1411: $d is an array of 2 element arrays (internal name, displayed name)
1412:
1413: =cut
1414:
1.31 albertel 1415: sub csv_samples_select_table {
1416: my ($r,$records,$d) = @_;
1417: my %sone; my %stwo; my %sthree;
1418: my $i=0;
1419:
1420: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
1421: %sone=&record_sep($$records[0]);
1422: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1423: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1424:
1425: foreach (sort keys %sone) {
1426: $r->print('<tr><td><select name=f'.$i.
1.32 matthew 1427: ' onchange="javascript:flip(this.form,'.$i.');">');
1.31 albertel 1428: foreach (@$d) {
1429: my ($value,$display)=@{ $_ };
1430: $r->print('<option value='.$value.'>'.$display.'</option>');
1431: }
1432: $r->print('</select></td><td>');
1433: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
1434: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
1435: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
1436: $r->print('</td></tr>');
1437: $i++;
1438: }
1439: $i--;
1440: return($i);
1.25 albertel 1441: }
1.1 albertel 1442: 1;
1443: __END__;
1.17 harris41 1444:
1.41 ng 1445: =pod
1446:
1447: =back
1448:
1449: =head2 Access .tab File Data
1450:
1451: =over 4
1452:
1.35 matthew 1453: =item languageids()
1.17 harris41 1454:
1.35 matthew 1455: returns list of all language ids
1.17 harris41 1456:
1.35 matthew 1457: =item languagedescription()
1.17 harris41 1458:
1.35 matthew 1459: returns description of a specified language id
1.17 harris41 1460:
1.35 matthew 1461: =item copyrightids()
1.17 harris41 1462:
1.35 matthew 1463: returns list of all copyrights
1.17 harris41 1464:
1.35 matthew 1465: =item copyrightdescription()
1.17 harris41 1466:
1.35 matthew 1467: returns description of a specified copyright id
1.17 harris41 1468:
1.35 matthew 1469: =item filecategories()
1.17 harris41 1470:
1.35 matthew 1471: returns list of all file categories
1.17 harris41 1472:
1.35 matthew 1473: =item filecategorytypes()
1.17 harris41 1474:
1.35 matthew 1475: returns list of file types belonging to a given file
1.17 harris41 1476: category
1477:
1.35 matthew 1478: =item fileembstyle()
1.17 harris41 1479:
1.35 matthew 1480: returns embedding style for a specified file type
1.17 harris41 1481:
1.35 matthew 1482: =item filedescription()
1.17 harris41 1483:
1.35 matthew 1484: returns description for a specified file type
1.17 harris41 1485:
1.35 matthew 1486: =item filedescriptionex()
1.17 harris41 1487:
1.35 matthew 1488: returns description for a specified file type with
1.17 harris41 1489: extra formatting
1490:
1.41 ng 1491: =back
1492:
1493: =head2 Alternate Problem Views
1494:
1495: =over 4
1496:
1.35 matthew 1497: =item get_previous_attempt()
1.17 harris41 1498:
1.35 matthew 1499: return string with previous attempt on problem
1.17 harris41 1500:
1.35 matthew 1501: =item get_student_view()
1.17 harris41 1502:
1.35 matthew 1503: show a snapshot of what student was looking at
1.17 harris41 1504:
1.35 matthew 1505: =item get_student_answers()
1.17 harris41 1506:
1.35 matthew 1507: show a snapshot of how student was answering problem
1.17 harris41 1508:
1.41 ng 1509: =back
1510:
1511: =head2 HTTP Helper
1512:
1513: =over 4
1514:
1515: =item get_unprocessed_cgi($query,$possible_names)
1516:
1517: Modify the %ENV hash to contain unprocessed CGI form parameters held in
1518: $query. The parameters listed in $possible_names (an array reference),
1519: will be set in $ENV{'form.name'} if they do not already exist.
1.17 harris41 1520:
1.41 ng 1521: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
1522: $possible_names is an ref to an array of form element names. As an example:
1523: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
1524: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
1.17 harris41 1525:
1.35 matthew 1526: =item cacheheader()
1.17 harris41 1527:
1.35 matthew 1528: returns cache-controlling header code
1.17 harris41 1529:
1.35 matthew 1530: =item nocache()
1.17 harris41 1531:
1.35 matthew 1532: specifies header code to not have cache
1.25 albertel 1533:
1.35 matthew 1534: =item add_to_env($name,$value)
1.25 albertel 1535:
1.35 matthew 1536: adds $name to the %ENV hash with value
1.25 albertel 1537: $value, if $name already exists, the entry is converted to an array
1538: reference and $value is added to the array.
1.17 harris41 1539:
1540: =back
1541:
1542: =cut
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