1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.70 2002/10/18 13:49:49 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # YEAR=2001
29: # 2/13-12/7 Guy Albertelli
30: # 12/11,12/12,12/17 Scott Harrison
31: # 12/21 Gerd Kortemeyer
32: # 12/21 Scott Harrison
33: # 12/25,12/28 Gerd Kortemeyer
34: # YEAR=2002
35: # 1/4 Gerd Kortemeyer
36: # 6/24,7/2 H. K. Ng
37:
38: # Makes a table out of the previous attempts
39: # Inputs result_from_symbread, user, domain, course_id
40: # Reads in non-network-related .tab files
41:
42: # POD header:
43:
44: =pod
45:
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:
71: =head2 General Subroutines
72:
73: =over 4
74:
75: =cut
76:
77: # End of POD header
78: package Apache::loncommon;
79:
80: use strict;
81: use Apache::lonnet();
82: use GDBM_File;
83: use POSIX qw(strftime mktime);
84: use Apache::Constants qw(:common);
85: use Apache::lonmsg();
86: my $readit;
87:
88: =pod
89:
90: =item Global Variables
91:
92: =over 4
93:
94: =cut
95: # ----------------------------------------------- Filetypes/Languages/Copyright
96: my %language;
97: my %cprtag;
98: my %fe; my %fd;
99: my %category_extensions;
100:
101: # ---------------------------------------------- Designs
102:
103: my %designhash;
104:
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
128:
129: # ----------------------------------------------------------------------- BEGIN
130:
131: =pod
132:
133: =item BEGIN()
134:
135: Initialize values from language.tab, copyright.tab, filetypes.tab,
136: thesaurus.tab, and filecategories.tab.
137:
138: =cut
139:
140: # ----------------------------------------------------------------------- BEGIN
141:
142: BEGIN {
143: # Variable initialization
144: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
145: #
146: unless ($readit) {
147: # ------------------------------------------------------------------- languages
148: {
149: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
150: '/language.tab');
151: if ($fh) {
152: while (<$fh>) {
153: next if /^\#/;
154: chomp;
155: my ($key,$val)=(split(/\s+/,$_,2));
156: $language{$key}=$val;
157: }
158: }
159: }
160: # ------------------------------------------------------------------ copyrights
161: {
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: }
171: }
172: }
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:
197: # ------------------------------------------------------------- file categories
198: {
199: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
200: '/filecategories.tab');
201: if ($fh) {
202: while (<$fh>) {
203: next if /^\#/;
204: chomp;
205: my ($extension,$category)=(split(/\s+/,$_,2));
206: push @{$category_extensions{lc($category)}},$extension;
207: }
208: }
209: }
210: # ------------------------------------------------------------------ file types
211: {
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: }
223: }
224: }
225: }
226: &Apache::lonnet::logthis(
227: "<font color=yellow>INFO: Read file types</font>");
228: $readit=1;
229: } # end of unless($readit)
230:
231: }
232: # ============================================================= END BEGIN BLOCK
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;
273: var editbrowser = null;
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
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:
344: =back
345:
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
349: first menu value is given in $menu{$choice1}->{'text'}. The values
350: and text for the second menu are given in the hash pointed to by
351: $menu{$choice1}->{'select2'}.
352:
353: my %menu = ( A1 => { text =>"Choice A1" ,
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 $result;
464: } # end of sub linked_select_forms {
465:
466: ###############################################################
467:
468: =pod
469:
470: =item help_open_topic($topic, $text, $stayOnPage, $width, $height)
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:
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:
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 $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.
479:
480: =cut
481:
482: sub help_open_topic {
483: my ($topic, $text, $stayOnPage, $width, $height) = @_;
484: $text = "" if (not defined $text);
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:
491: my $template = "";
492: my $link;
493:
494: if (!$stayOnPage)
495: {
496: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height'))";
497: }
498: else
499: {
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: $template .= <<"ENDTEMPLATE";
511: <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
512: ENDTEMPLATE
513:
514: return $template;
515:
516: }
517:
518: =pod
519:
520: =item csv_translate($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 $text;
532: }
533:
534: ###############################################################
535: ## Home server <option> list generating code ##
536: ###############################################################
537: #-------------------------------------------
538:
539: =pod
540:
541: =item get_domains()
542:
543: Returns an array containing each of the domains listed in the hosts.tab
544: file.
545:
546: =cut
547:
548: #-------------------------------------------
549: sub get_domains {
550: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
551: my @domains;
552: my %seen;
553: foreach (sort values(%Apache::lonnet::hostdom)) {
554: push (@domains,$_) unless $seen{$_}++;
555: }
556: return @domains;
557: }
558:
559: #-------------------------------------------
560:
561: =pod
562:
563: =item select_dom_form($defdom,$name)
564:
565: Returns a string containing a <select name='$name' size='1'> form to
566: allow a user to select the domain to preform an operation in.
567: See loncreateuser.pm for an example invocation and use.
568:
569: =cut
570:
571: #-------------------------------------------
572: sub select_dom_form {
573: my ($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 $selectdomain;
583: }
584:
585: #-------------------------------------------
586:
587: =pod
588:
589: =item get_library_servers($domain)
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: #-------------------------------------------
598: sub get_library_servers {
599: my $domain = shift;
600: my %library_servers;
601: foreach (keys(%Apache::lonnet::libserv)) {
602: if ($Apache::lonnet::hostdom{$_} eq $domain) {
603: $library_servers{$_} = $Apache::lonnet::hostname{$_};
604: }
605: }
606: return %library_servers;
607: }
608:
609: #-------------------------------------------
610:
611: =pod
612:
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: #-------------------------------------------
621: sub home_server_option_list {
622: my $domain = shift;
623: my %servers = &get_library_servers($domain);
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: ###############################################################
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.
643: #-------------------------------------------
644:
645: =pod
646:
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: #-------------------------------------------
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: }
711:
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;
729: }
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: $result.=<<"END";
765: <input type="radio" name="login" value="nochange" checked="checked"
766: onclick="javascript:changed_radio('nochange',$in{'formname'});" />
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'});"
782: onchange="javascript:changed_radio('krb',$in{'formname'});" />
783: Kerberos authenticated with domain
784: <input type="text" size="10" name="krbarg" value=""
785: onchange="javascript:changed_text('krb',$in{'formname'});" />
786: <input type="radio" name="krbver" value="4" checked="on" />Version 4
787: <input type="radio" name="krbver" value="5" />Version 5
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'});"
802: onclick="javascript:changed_radio('int',$args{'formname'});" />
803: Internally authenticated (with initial password
804: <input type="text" size="10" name="intarg" value=""
805: onchange="javascript:changed_text('int',$args{'formname'});" />
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'});"
820: onclick="javascript:changed_radio('loc',$in{'formname'});" />
821: Local Authentication with argument
822: <input type="text" size="10" name="locarg" value=""
823: onchange="javascript:changed_text('loc',$in{'formname'});" />
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'});"
838: onclick="javascript:changed_radio('fsys',$in{'formname'});" />
839: Filesystem authenticated (with initial password
840: <input type="text" size="10" name="fsysarg" value=""
841: onchange="javascript:changed_text('fsys',$in{'formname'});">
842: END
843: return $result;
844: }
845:
846: ###############################################################
847: ## End Authentication changing form generation functions ##
848: ###############################################################
849:
850: ###############################################################
851: ## Thesaurus Functions ##
852: ###############################################################
853:
854: =pod
855:
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',
877: $thesaurus_db_file,&GDBM_READER(),0640)){
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: ###################################################
910:
911: sub keyword {
912: return if (!&initialize_keywords());
913: my $word=lc(shift());
914: $word=~s/\W//g;
915: return exists($Keywords{$word});
916: }
917:
918: ###############################################################
919:
920: =pod
921:
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',
943: $thesaurus_db_file,&GDBM_READER(),0640)){
944: return ();
945: }
946: my @Words=();
947: if (exists($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];
953: }
954: }
955: untie %thesaurus_db;
956: return @Words;
957: }
958:
959: ###############################################################
960: ## End Thesaurus Functions ##
961: ###############################################################
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);
970: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
971: $names{'lastname'}.' '.$names{'generation'};
972: $name=~s/\s+$//;
973: $name=~s/\s+/ /g;
974: return $name;
975: }
976:
977: # -------------------------------------------------------------------- Nickname
978:
979:
980: sub nickname {
981: my ($uname,$udom)=@_;
982: my %names=&Apache::lonnet::get('environment',
983: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
984: my $name=$names{'nickname'};
985: if ($name) {
986: $name='"'.$name.'"';
987: } else {
988: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
989: $names{'lastname'}.' '.$names{'generation'};
990: $name=~s/\s+$//;
991: $name=~s/\s+/ /g;
992: }
993: return $name;
994: }
995:
996:
997: # ------------------------------------------------------------------ Screenname
998:
999: sub screenname {
1000: my ($uname,$udom)=@_;
1001: my %names=
1002: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1003: return $names{'screenname'};
1004: }
1005:
1006: # ------------------------------------------------------------- Message Wrapper
1007:
1008: sub messagewrapper {
1009: my ($link,$un,$do)=@_;
1010: return
1011: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1012: }
1013: # ------------------------------------------------------------- Aboutme Wrapper
1014:
1015: sub aboutmewrapper {
1016: my ($link,$username,$domain)=@_;
1017: return "<a href='/adm/$domain/$username/aboutme'>$link</a>";
1018: }
1019:
1020: # ------------------------------------------------------------ Syllabus Wrapper
1021:
1022:
1023: sub syllabuswrapper {
1024: my ($link,$un,$do)=@_;
1025: return "<a href='/public/$do/$un/syllabus'>$link</a>";
1026: }
1027:
1028: # ---------------------------------------------------------------- Language IDs
1029: sub languageids {
1030: return sort(keys(%language));
1031: }
1032:
1033: # -------------------------------------------------------- Language Description
1034: sub languagedescription {
1035: return $language{shift(@_)};
1036: }
1037:
1038: # --------------------------------------------------------------- Copyright IDs
1039: sub copyrightids {
1040: return sort(keys(%cprtag));
1041: }
1042:
1043: # ------------------------------------------------------- Copyright Description
1044: sub copyrightdescription {
1045: return $cprtag{shift(@_)};
1046: }
1047:
1048: # ------------------------------------------------------------- File Categories
1049: sub filecategories {
1050: return sort(keys(%category_extensions));
1051: }
1052:
1053: # -------------------------------------- File Types within a specified category
1054: sub filecategorytypes {
1055: return @{$category_extensions{lc($_[0])}};
1056: }
1057:
1058: # ------------------------------------------------------------------ File Types
1059: sub fileextensions {
1060: return sort(keys(%fe));
1061: }
1062:
1063: # ------------------------------------------------------------- Embedding Style
1064: sub fileembstyle {
1065: return $fe{lc(shift(@_))};
1066: }
1067:
1068: # ------------------------------------------------------------ Description Text
1069: sub filedescription {
1070: return $fd{lc(shift(@_))};
1071: }
1072:
1073: # ------------------------------------------------------------ Description Text
1074: sub filedescriptionex {
1075: my $ex=shift;
1076: return '.'.$ex.' '.$fd{lc($ex)};
1077: }
1078:
1079: # ---- Retrieve attempts by students
1080: # input
1081: # $symb - problem including path
1082: # $username,$domain - that of the student
1083: # $course - course name
1084: # $getattempt - leave blank if want all attempts, else put something.
1085: # $regexp - regular expression. If string matches regexp send to
1086: # $gradesub - routine that process the string if it matches regexp
1087: #
1088: # output
1089: # formatted as a table all the attempts, if any.
1090: #
1091: sub get_previous_attempt {
1092: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
1093: my $prevattempts='';
1094: no strict 'refs';
1095: if ($symb) {
1096: my (%returnhash)=
1097: &Apache::lonnet::restore($symb,$course,$domain,$username);
1098: if ($returnhash{'version'}) {
1099: my %lasthash=();
1100: my $version;
1101: for ($version=1;$version<=$returnhash{'version'};$version++) {
1102: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
1103: $lasthash{$_}=$returnhash{$version.':'.$_};
1104: }
1105: }
1106: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
1107: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
1108: foreach (sort(keys %lasthash)) {
1109: my ($ign,@parts) = split(/\./,$_);
1110: if ($#parts > 0) {
1111: my $data=$parts[-1];
1112: pop(@parts);
1113: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
1114: } else {
1115: if ($#parts == 0) {
1116: $prevattempts.='<th>'.$parts[0].'</th>';
1117: } else {
1118: $prevattempts.='<th>'.$ign.'</th>';
1119: }
1120: }
1121: }
1122: if ($getattempt eq '') {
1123: for ($version=1;$version<=$returnhash{'version'};$version++) {
1124: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
1125: foreach (sort(keys %lasthash)) {
1126: my $value;
1127: if ($_ =~ /timestamp/) {
1128: $value=scalar(localtime($returnhash{$version.':'.$_}));
1129: } else {
1130: $value=$returnhash{$version.':'.$_};
1131: }
1132: $prevattempts.='<td>'.$value.' </td>';
1133: }
1134: }
1135: }
1136: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
1137: foreach (sort(keys %lasthash)) {
1138: my $value;
1139: if ($_ =~ /timestamp/) {
1140: $value=scalar(localtime($lasthash{$_}));
1141: } else {
1142: $value=$lasthash{$_};
1143: }
1144: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
1145: $prevattempts.='<td>'.$value.' </td>';
1146: }
1147: $prevattempts.='</tr></table></td></tr></table>';
1148: } else {
1149: $prevattempts='Nothing submitted - no attempts.';
1150: }
1151: } else {
1152: $prevattempts='No data.';
1153: }
1154: }
1155:
1156: sub get_student_view {
1157: my ($symb,$username,$domain,$courseid,$target) = @_;
1158: my ($map,$id,$feedurl) = split(/___/,$symb);
1159: my (%old,%moreenv);
1160: my @elements=('symb','courseid','domain','username');
1161: foreach my $element (@elements) {
1162: $old{$element}=$ENV{'form.grade_'.$element};
1163: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1164: }
1165: if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
1166: &Apache::lonnet::appenv(%moreenv);
1167: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1168: &Apache::lonnet::delenv('form.grade_');
1169: foreach my $element (@elements) {
1170: $ENV{'form.grade_'.$element}=$old{$element};
1171: }
1172: $userview=~s/\<body[^\>]*\>//gi;
1173: $userview=~s/\<\/body\>//gi;
1174: $userview=~s/\<html\>//gi;
1175: $userview=~s/\<\/html\>//gi;
1176: $userview=~s/\<head\>//gi;
1177: $userview=~s/\<\/head\>//gi;
1178: $userview=~s/action\s*\=/would_be_action\=/gi;
1179: return $userview;
1180: }
1181:
1182: sub get_student_answers {
1183: my ($symb,$username,$domain,$courseid) = @_;
1184: my ($map,$id,$feedurl) = split(/___/,$symb);
1185: my (%old,%moreenv);
1186: my @elements=('symb','courseid','domain','username');
1187: foreach my $element (@elements) {
1188: $old{$element}=$ENV{'form.grade_'.$element};
1189: $moreenv{'form.grade_'.$element}=eval '$'.$element #'
1190: }
1191: $moreenv{'form.grade_target'}='answer';
1192: &Apache::lonnet::appenv(%moreenv);
1193: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
1194: &Apache::lonnet::delenv('form.grade_');
1195: foreach my $element (@elements) {
1196: $ENV{'form.grade_'.$element}=$old{$element};
1197: }
1198: return $userview;
1199: }
1200:
1201: ###############################################
1202:
1203:
1204: sub timehash {
1205: my @ltime=localtime(shift);
1206: return ( 'seconds' => $ltime[0],
1207: 'minutes' => $ltime[1],
1208: 'hours' => $ltime[2],
1209: 'day' => $ltime[3],
1210: 'month' => $ltime[4]+1,
1211: 'year' => $ltime[5]+1900,
1212: 'weekday' => $ltime[6],
1213: 'dayyear' => $ltime[7]+1,
1214: 'dlsav' => $ltime[8] );
1215: }
1216:
1217: sub maketime {
1218: my %th=@_;
1219: return POSIX::mktime(
1220: ($th{'seconds'},$th{'minutes'},$th{'hours'},
1221: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
1222: }
1223:
1224:
1225: #########################################
1226: #
1227: # Retro-fixing of un-backward-compatible time format
1228:
1229: sub unsqltime {
1230: my $timestamp=shift;
1231: if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) {
1232: $timestamp=&maketime(
1233: 'year'=>$1,'month'=>$2,'day'=>$3,
1234: 'hours'=>$4,'minutes'=>$5,'seconds'=>$6);
1235: }
1236: return $timestamp;
1237: }
1238:
1239: #########################################
1240:
1241: sub findallcourses {
1242: my %courses=();
1243: my $now=time;
1244: foreach (keys %ENV) {
1245: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
1246: my ($starttime,$endtime)=$ENV{$_};
1247: my $active=1;
1248: if ($starttime) {
1249: if ($now<$starttime) { $active=0; }
1250: }
1251: if ($endtime) {
1252: if ($now>$endtime) { $active=0; }
1253: }
1254: if ($active) { $courses{$1.'_'.$2}=1; }
1255: }
1256: }
1257: return keys %courses;
1258: }
1259:
1260: ###############################################
1261: ###############################################
1262:
1263: =pod
1264:
1265: =item &determinedomain()
1266:
1267: Inputs: $domain (usually will be undef)
1268:
1269: Returns: Determines which domain should be used for designs
1270:
1271: =cut
1272:
1273: ###############################################
1274: sub determinedomain {
1275: my $domain=shift;
1276: if (! $domain) {
1277: # Determine domain if we have not been given one
1278: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
1279: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
1280: if ($ENV{'request.role.domain'}) {
1281: $domain=$ENV{'request.role.domain'};
1282: }
1283: }
1284: return $domain;
1285: }
1286: ###############################################
1287: =pod
1288:
1289: =item &domainlogo()
1290:
1291: Inputs: $domain (usually will be undef)
1292:
1293: Returns: A link to a domain logo, if the domain logo exists.
1294: If the domain logo does not exist, a description of the domain.
1295:
1296: =cut
1297: ###############################################
1298: sub domainlogo {
1299: my $domain = &determinedomain(shift);
1300: # See if there is a logo
1301: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
1302: return '<img src="/adm/lonDomLogos/'.$domain.'.gif" />';
1303: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
1304: return $Apache::lonnet::domaindescription{$domain};
1305: } else {
1306: return '';
1307: }
1308: }
1309: ##############################################
1310:
1311: =pod
1312:
1313: =item &designparm()
1314:
1315: Inputs: $which parameter; $domain (usually will be undef)
1316:
1317: Returns: value of designparamter $which
1318:
1319: =cut
1320: ##############################################
1321: sub designparm {
1322: my ($which,$domain)=@_;
1323: $domain=&determinedomain($domain);
1324: if ($designhash{$domain.'.'.$which}) {
1325: return $designhash{$domain.'.'.$which};
1326: } else {
1327: return $designhash{'default.'.$which};
1328: }
1329: }
1330:
1331: ###############################################
1332: ###############################################
1333:
1334: =pod
1335:
1336: =item &bodytag()
1337:
1338: Returns a uniform header for LON-CAPA web pages.
1339:
1340: Inputs:
1341:
1342: $title, A title to be displayed on the page.
1343: $function, the current role (can be undef).
1344: $addentries, extra parameters for the <body> tag.
1345: $bodyonly, if defined, only return the <body> tag.
1346: $domain, if defined, force a given domain.
1347:
1348: Returns: A uniform header for LON-CAPA web pages.
1349: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
1350: If $bodyonly is undef or zero, an html string containing a <body> tag and
1351: other decorations will be returned.
1352:
1353: =cut
1354:
1355: ###############################################
1356:
1357:
1358: ###############################################
1359: sub bodytag {
1360: my ($title,$function,$addentries,$bodyonly,$domain)=@_;
1361: unless ($function) {
1362: $function='student';
1363: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
1364: $function='coordinator';
1365: }
1366: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
1367: $function='admin';
1368: }
1369: if (($ENV{'request.role'}=~/^(au|ca)/) ||
1370: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
1371: $function='author';
1372: }
1373: }
1374: my $img=&designparm($function.'.img',$domain);
1375: my $pgbg=&designparm($function.'.pgbg',$domain);
1376: my $tabbg=&designparm($function.'.tabbg',$domain);
1377: my $font=&designparm($function.'.font',$domain);
1378: my $link=&designparm($function.'.link',$domain);
1379: my $alink=&designparm($function.'.alink',$domain);
1380: my $vlink=&designparm($function.'.vlink',$domain);
1381: my $sidebg=&designparm($function.'.sidebg',$domain);
1382:
1383: # role and realm
1384: my ($role,$realm)
1385: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
1386: # realm
1387: if ($ENV{'request.course.id'}) {
1388: $realm=
1389: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1390: }
1391: unless ($realm) { $realm=' '; }
1392: # Set messages
1393: my $messages=&domainlogo($domain);
1394: # Output
1395: my $bodytag = <<END;
1396: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
1397: $addentries>
1398: END
1399: if ($bodyonly) {
1400: return $bodytag;
1401: } else {
1402: return(<<ENDBODY);
1403: $bodytag
1404: <table width="100%" cellspacing="0" border="0" cellpadding="0">
1405: <tr><td bgcolor="$font">
1406: <img src="$img" /></td>
1407: <td bgcolor="$font"><font color='$sidebg'>$messages</font></td>
1408: </tr>
1409: <tr>
1410: <td rowspan="3" bgcolor="$tabbg">
1411: <font size="5"><b>$title</b></font>
1412: <td bgcolor="$tabbg" align="right">
1413: <font size="2">
1414: $ENV{'environment.firstname'}
1415: $ENV{'environment.middlename'}
1416: $ENV{'environment.lastname'}
1417: $ENV{'environment.generation'}
1418: </font>
1419: </td>
1420: </tr>
1421: <tr><td bgcolor="$tabbg" align="right">
1422: <font size="2">$role</font>
1423: </td></tr>
1424: <tr>
1425: <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr>
1426: </table><br>
1427: ENDBODY
1428: }
1429: }
1430: ###############################################
1431:
1432: sub get_unprocessed_cgi {
1433: my ($query,$possible_names)= @_;
1434: # $Apache::lonxml::debug=1;
1435: foreach (split(/&/,$query)) {
1436: my ($name, $value) = split(/=/,$_);
1437: $name = &Apache::lonnet::unescape($name);
1438: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
1439: $value =~ tr/+/ /;
1440: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1441: &Apache::lonxml::debug("Seting :$name: to :$value:");
1442: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
1443: }
1444: }
1445: }
1446:
1447: sub cacheheader {
1448: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1449: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1450: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
1451: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
1452: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
1453: return $output;
1454: }
1455:
1456: sub no_cache {
1457: my ($r) = @_;
1458: unless ($ENV{'request.method'} eq 'GET') { return ''; }
1459: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
1460: $r->no_cache(1);
1461: $r->header_out("Pragma" => "no-cache");
1462: #$r->header_out("Expires" => $date);
1463: }
1464:
1465: sub add_to_env {
1466: my ($name,$value)=@_;
1467: if (defined($ENV{$name})) {
1468: if (ref($ENV{$name})) {
1469: #already have multiple values
1470: push(@{ $ENV{$name} },$value);
1471: } else {
1472: #first time seeing multiple values, convert hash entry to an arrayref
1473: my $first=$ENV{$name};
1474: undef($ENV{$name});
1475: push(@{ $ENV{$name} },$first,$value);
1476: }
1477: } else {
1478: $ENV{$name}=$value;
1479: }
1480: }
1481:
1482: =pod
1483:
1484: =back
1485:
1486: =head2 CSV Upload/Handling functions
1487:
1488: =over 4
1489:
1490: =item upfile_store($r)
1491:
1492: Store uploaded file, $r should be the HTTP Request object,
1493: needs $ENV{'form.upfile'}
1494: returns $datatoken to be put into hidden field
1495:
1496: =cut
1497:
1498: sub upfile_store {
1499: my $r=shift;
1500: $ENV{'form.upfile'}=~s/\r/\n/gs;
1501: $ENV{'form.upfile'}=~s/\f/\n/gs;
1502: $ENV{'form.upfile'}=~s/\n+/\n/gs;
1503: $ENV{'form.upfile'}=~s/\n+$//gs;
1504:
1505: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1506: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
1507: {
1508: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
1509: '/tmp/'.$datatoken.'.tmp');
1510: print $fh $ENV{'form.upfile'};
1511: }
1512: return $datatoken;
1513: }
1514:
1515: =pod
1516:
1517: =item load_tmp_file($r)
1518:
1519: Load uploaded file from tmp, $r should be the HTTP Request object,
1520: needs $ENV{'form.datatoken'},
1521: sets $ENV{'form.upfile'} to the contents of the file
1522:
1523: =cut
1524:
1525: sub load_tmp_file {
1526: my $r=shift;
1527: my @studentdata=();
1528: {
1529: my $fh;
1530: if ($fh=Apache::File->new($r->dir_config('lonDaemons').
1531: '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {
1532: @studentdata=<$fh>;
1533: }
1534: }
1535: $ENV{'form.upfile'}=join('',@studentdata);
1536: }
1537:
1538: =pod
1539:
1540: =item upfile_record_sep()
1541:
1542: Separate uploaded file into records
1543: returns array of records,
1544: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
1545:
1546: =cut
1547:
1548: sub upfile_record_sep {
1549: if ($ENV{'form.upfiletype'} eq 'xml') {
1550: } else {
1551: return split(/\n/,$ENV{'form.upfile'});
1552: }
1553: }
1554:
1555: =pod
1556:
1557: =item record_sep($record)
1558:
1559: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
1560:
1561: =cut
1562:
1563: sub record_sep {
1564: my $record=shift;
1565: my %components=();
1566: if ($ENV{'form.upfiletype'} eq 'xml') {
1567: } elsif ($ENV{'form.upfiletype'} eq 'space') {
1568: my $i=0;
1569: foreach (split(/\s+/,$record)) {
1570: my $field=$_;
1571: $field=~s/^(\"|\')//;
1572: $field=~s/(\"|\')$//;
1573: $components{$i}=$field;
1574: $i++;
1575: }
1576: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
1577: my $i=0;
1578: foreach (split(/\t+/,$record)) {
1579: my $field=$_;
1580: $field=~s/^(\"|\')//;
1581: $field=~s/(\"|\')$//;
1582: $components{$i}=$field;
1583: $i++;
1584: }
1585: } else {
1586: my @allfields=split(/\,/,$record);
1587: my $i=0;
1588: my $j;
1589: for ($j=0;$j<=$#allfields;$j++) {
1590: my $field=$allfields[$j];
1591: if ($field=~/^\s*(\"|\')/) {
1592: my $delimiter=$1;
1593: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
1594: $j++;
1595: $field.=','.$allfields[$j];
1596: }
1597: $field=~s/^\s*$delimiter//;
1598: $field=~s/$delimiter\s*$//;
1599: }
1600: $components{$i}=$field;
1601: $i++;
1602: }
1603: }
1604: return %components;
1605: }
1606:
1607: =pod
1608:
1609: =item upfile_select_html()
1610:
1611: return HTML code to select file and specify its type
1612:
1613: =cut
1614:
1615: sub upfile_select_html {
1616: return (<<'ENDUPFORM');
1617: <input type="file" name="upfile" size="50" />
1618: <br />Type: <select name="upfiletype">
1619: <option value="csv">CSV (comma separated values, spreadsheet)</option>
1620: <option value="space">Space separated</option>
1621: <option value="tab">Tabulator separated</option>
1622: <option value="xml">HTML/XML</option>
1623: </select>
1624: ENDUPFORM
1625: }
1626:
1627: =pod
1628:
1629: =item csv_print_samples($r,$records)
1630:
1631: Prints a table of sample values from each column uploaded $r is an
1632: Apache Request ref, $records is an arrayref from
1633: &Apache::loncommon::upfile_record_sep
1634:
1635: =cut
1636:
1637: sub csv_print_samples {
1638: my ($r,$records) = @_;
1639: my (%sone,%stwo,%sthree);
1640: %sone=&record_sep($$records[0]);
1641: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1642: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1643:
1644: $r->print('Samples<br /><table border="2"><tr>');
1645: foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column '.($_+1).'</th>'); }
1646: $r->print('</tr>');
1647: foreach my $hash (\%sone,\%stwo,\%sthree) {
1648: $r->print('<tr>');
1649: foreach (sort({$a <=> $b} keys(%sone))) {
1650: $r->print('<td>');
1651: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
1652: $r->print('</td>');
1653: }
1654: $r->print('</tr>');
1655: }
1656: $r->print('</tr></table><br />'."\n");
1657: }
1658:
1659: =pod
1660:
1661: =item csv_print_select_table($r,$records,$d)
1662:
1663: Prints a table to create associations between values and table columns.
1664: $r is an Apache Request ref,
1665: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1666: $d is an array of 2 element arrays (internal name, displayed name)
1667:
1668: =cut
1669:
1670: sub csv_print_select_table {
1671: my ($r,$records,$d) = @_;
1672: my $i=0;my %sone;
1673: %sone=&record_sep($$records[0]);
1674: $r->print('Associate columns with student attributes.'."\n".
1675: '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");
1676: foreach (@$d) {
1677: my ($value,$display)=@{ $_ };
1678: $r->print('<tr><td>'.$display.'</td>');
1679:
1680: $r->print('<td><select name=f'.$i.
1681: ' onchange="javascript:flip(this.form,'.$i.');">');
1682: $r->print('<option value="none"></option>');
1683: foreach (sort({$a <=> $b} keys(%sone))) {
1684: $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');
1685: }
1686: $r->print('</select></td></tr>'."\n");
1687: $i++;
1688: }
1689: $i--;
1690: return $i;
1691: }
1692:
1693: =pod
1694:
1695: =item csv_samples_select_table($r,$records,$d)
1696:
1697: Prints a table of sample values from the upload and can make associate samples to internal names.
1698:
1699: $r is an Apache Request ref,
1700: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
1701: $d is an array of 2 element arrays (internal name, displayed name)
1702:
1703: =cut
1704:
1705: sub csv_samples_select_table {
1706: my ($r,$records,$d) = @_;
1707: my %sone; my %stwo; my %sthree;
1708: my $i=0;
1709:
1710: $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');
1711: %sone=&record_sep($$records[0]);
1712: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
1713: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
1714:
1715: foreach (sort keys %sone) {
1716: $r->print('<tr><td><select name=f'.$i.
1717: ' onchange="javascript:flip(this.form,'.$i.');">');
1718: foreach (@$d) {
1719: my ($value,$display)=@{ $_ };
1720: $r->print('<option value='.$value.'>'.$display.'</option>');
1721: }
1722: $r->print('</select></td><td>');
1723: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
1724: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
1725: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
1726: $r->print('</td></tr>');
1727: $i++;
1728: }
1729: $i--;
1730: return($i);
1731: }
1732: 1;
1733: __END__;
1734:
1735: =pod
1736:
1737: =back
1738:
1739: =head2 Access .tab File Data
1740:
1741: =over 4
1742:
1743: =item languageids()
1744:
1745: returns list of all language ids
1746:
1747: =item languagedescription()
1748:
1749: returns description of a specified language id
1750:
1751: =item copyrightids()
1752:
1753: returns list of all copyrights
1754:
1755: =item copyrightdescription()
1756:
1757: returns description of a specified copyright id
1758:
1759: =item filecategories()
1760:
1761: returns list of all file categories
1762:
1763: =item filecategorytypes()
1764:
1765: returns list of file types belonging to a given file
1766: category
1767:
1768: =item fileembstyle()
1769:
1770: returns embedding style for a specified file type
1771:
1772: =item filedescription()
1773:
1774: returns description for a specified file type
1775:
1776: =item filedescriptionex()
1777:
1778: returns description for a specified file type with
1779: extra formatting
1780:
1781: =back
1782:
1783: =head2 Alternate Problem Views
1784:
1785: =over 4
1786:
1787: =item get_previous_attempt()
1788:
1789: return string with previous attempt on problem
1790:
1791: =item get_student_view()
1792:
1793: show a snapshot of what student was looking at
1794:
1795: =item get_student_answers()
1796:
1797: show a snapshot of how student was answering problem
1798:
1799: =back
1800:
1801: =head2 HTTP Helper
1802:
1803: =over 4
1804:
1805: =item get_unprocessed_cgi($query,$possible_names)
1806:
1807: Modify the %ENV hash to contain unprocessed CGI form parameters held in
1808: $query. The parameters listed in $possible_names (an array reference),
1809: will be set in $ENV{'form.name'} if they do not already exist.
1810:
1811: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
1812: $possible_names is an ref to an array of form element names. As an example:
1813: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
1814: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
1815:
1816: =item cacheheader()
1817:
1818: returns cache-controlling header code
1819:
1820: =item no_cache($r)
1821:
1822: specifies header code to not have cache
1823:
1824: =item add_to_env($name,$value)
1825:
1826: adds $name to the %ENV hash with value
1827: $value, if $name already exists, the entry is converted to an array
1828: reference and $value is added to the array.
1829:
1830: =back
1831:
1832: =cut
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