1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.67 2011/07/04 09:25:02 foxr Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ####################################################
28: ####################################################
29:
30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonstathelpers - helper routines used by statistics
35:
36: =head1 SYNOPSIS
37:
38: This module provides a place to consolidate much of the statistics
39: routines that are needed across multiple statistics functions.
40:
41: =head1 OVERVIEW
42:
43: =over 4
44:
45: =cut
46:
47: ####################################################
48: ####################################################
49: package Apache::lonstathelpers;
50:
51: use strict;
52: use Apache::lonnet;
53: use Apache::loncommon();
54: use Apache::lonhtmlcommon();
55: use Apache::loncoursedata();
56: use Apache::lonstatistics;
57: use Apache::lonlocal;
58: use HTML::Entities();
59: use Time::Local();
60: use Spreadsheet::WriteExcel();
61: use GDBM_File;
62: use Storable qw(freeze thaw);
63: use lib '/home/httpd/lib/perl/';
64: use LONCAPA;
65:
66:
67: ####################################################
68: ####################################################
69:
70: =pod
71:
72: =item &render_resource($resource)
73:
74: Input: a navmaps resource
75:
76: Retunrs: a scalar containing html for a rendering of the problem
77: within a table.
78:
79: =cut
80:
81: ####################################################
82: ####################################################
83: sub render_resource {
84: my ($resource) = @_;
85: ##
86: ## Render the problem
87: my ($base) = ($resource->src =~ m|^(.*/)[^/]*$|);
88: $base="http://".$ENV{'SERVER_NAME'}.$base;
89: my ($src,$symb)=($resource->link,&escape($resource->shown_symb));
90: my $rendered_problem = &Apache::lonnet::ssi_body($src.'?symb='.$symb);
91: $rendered_problem =~ s/<\s*form\s*/<nop /g;
92: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
93: return '<table bgcolor="ffffff"><tr><td>'.
94: '<base href="'.$base.'" />'.
95: $rendered_problem.
96: '</td></tr></table>';
97: }
98:
99: ####################################################
100: ####################################################
101:
102: =pod
103:
104: =item &get_resources
105:
106: =cut
107:
108: ####################################################
109: ####################################################
110: sub get_resources {
111: my ($navmap,$sequence) = @_;
112: my @resources = $navmap->retrieveResources($sequence,
113: sub { shift->is_problem(); },
114: 0,0,0);
115: return @resources;
116: }
117:
118: ####################################################
119: ####################################################
120:
121: =pod
122:
123: =item &problem_selector($AcceptedResponseTypes)
124:
125: Input: scalar containing regular expression which matches response
126: types to show. '.' will yield all, '(option|radiobutton)' will match
127: all option response and radiobutton problems.
128:
129: Returns: A string containing html for a table which lists the sequences
130: and their contents. A radiobutton is provided for each problem.
131: Skips 'survey' problems.
132:
133: =cut
134:
135: ####################################################
136: ####################################################
137: sub problem_selector {
138: my ($AcceptedResponseTypes,$sequence_addendum,$symbmode,$all,$prefix,$smallbox,$onclick) = @_;
139: # all: also make sequences selectable
140: # prefix: prefix for all form names
141: # smallbox: use smaller box
142: # onclick: javascript to execute when clicked
143: my $Str;
144: my $jsadd='';
145: if ($onclick) {
146: $jsadd="onClick='$onclick'";
147: }
148: $Str = &Apache::loncommon::start_scrollbox(($smallbox?'420px':'620px'),
149: ($smallbox?'400px':'600px'),
150: ($smallbox?'60px':'300px')).
151: &Apache::loncommon::start_data_table();
152: my $rb_count =0;
153: my ($navmap,@sequences) =
154: &Apache::lonstatistics::selected_sequences_with_assessments('all');
155: return $navmap if (! ref($navmap)); # error
156: foreach my $seq (@sequences) {
157: my $seq_str = '';
158: foreach my $res (&get_resources($navmap,$seq)) {
159: foreach my $part (@{$res->parts}) {
160: my @response_ids = $res->responseIds($part);
161: my @response_types = $res->responseType($part);
162: for (my $i=0;$i<scalar(@response_types);$i++){
163: my $respid = $response_ids[$i];
164: my $resptype = $response_types[$i];
165: if ($resptype =~ m/$AcceptedResponseTypes/) {
166: my $value = &make_target_id({symb=>$res->symb,
167: part=>$part,
168: respid=>$respid,
169: resptype=>$resptype});
170: my $checked = '';
171: if ($env{'form.problemchoice'} eq $value) {
172: $checked = ' checked="checked"';
173: }
174: my $title = $res->compTitle;
175: if (! defined($title) || $title eq '') {
176: ($title) = ($res->src =~ m:/([^/]*)$:);
177: }
178: $seq_str .= &Apache::loncommon::start_data_table_row().
179: ($symbmode?
180: '<td><input type="radio" id="'.$prefix.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' '.
181: $jsadd.
182: ' /></td>'
183: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
184: '<td><label for="'.$prefix.$rb_count.'">'.$resptype.'</label></td>'.
185: '<td><label for="'.$prefix.$rb_count.'">'.$title.'</label>';
186: if (scalar(@response_ids) > 1) {
187: $seq_str .= &mt('response').' '.$respid;
188: }
189: my $link = $res->link.'?symb='.&escape($res->shown_symb);
190: $seq_str .= (' 'x2).
191: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
192: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
193: $rb_count++;
194: }
195: }
196: }
197: }
198: if ($seq_str ne '') {
199: $Str .= &Apache::loncommon::start_data_table_header_row().
200: '<th colspan="3">'.
201: ($all?'<input type="radio" id="'.$prefix.'s'.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($seq->symb,'<>&').'" '.$jsadd.' />':'').
202: $seq->compTitle.'</th>'.
203: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
204: if (defined($sequence_addendum)) {
205: $Str .= &Apache::loncommon::start_data_table_header_row().
206: ('<td> </td>'x2).
207: '<td align="right">'.$sequence_addendum.'</td>'.
208: &Apache::loncommon::end_data_table_header_row()."\n";
209: }
210: }
211:
212: }
213: $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
214: return $Str;
215: }
216:
217: ####################################################
218: ####################################################
219:
220: =pod
221:
222: =item &MultipleProblemSelector($navmap,$selected,$inputname)
223:
224: Generate HTML with checkboxes for problem selection.
225:
226: Input:
227:
228: $navmap: a navmap object. If undef, navmaps will be called to create a
229: new object.
230:
231: $selected: Scalar, Array, or hash reference of currently selected items.
232:
233: $inputname: The name of the form elements to use for the checkboxs.
234:
235: Returns: A string containing html for a table which lists the sequences
236: and their contents. A checkbox is provided for each problem.
237:
238: =cut
239:
240: ####################################################
241: ####################################################
242: sub MultipleProblemSelector {
243: my ($navmap,$inputname,$formname,$anoncounter)=@_;
244: my $cid = $env{'request.course.id'};
245: my $Str;
246: # Massage the input as needed.
247: if (! defined($navmap)) {
248: $navmap = Apache::lonnavmaps::navmap->new();
249: if (! defined($navmap)) {
250: $Str .= '<div class="LC_error">'
251: .&mt('Error: cannot process course structure')
252: .'</div>';
253: return $Str;
254: }
255: }
256: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
257: # Header
258: $Str .= <<"END";
259: <script type="text/javascript" language="JavaScript">
260: function checkall(value,seqid) {
261: for (i=0; i<document.forms.$formname.elements.length; i++) {
262: ele = document.forms.$formname.elements[i];
263: if (ele.name == '$inputname') {
264: if (seqid != null) {
265: itemid = document.forms.$formname.elements[i].id;
266: thing = itemid.split(':');
267: if (thing[0] == seqid) {
268: document.forms.$formname.elements[i].checked=value;
269: }
270: } else {
271: document.forms.$formname.elements[i].checked=value;
272: }
273: }
274: }
275: }
276: </script>
277: END
278: my $checkanonjs = <<"END";
279:
280: <script type="text/javascript" language="JavaScript">
281: function checkanon() {
282: return true;
283: }
284: </script>
285:
286: END
287: if (ref($anoncounter) eq 'HASH') {
288: if (keys(%{$anoncounter}) > 0) {
289: my $anonwarning = &mt('Your selection includes both problems with and without anonymous submissions.').'\n'.&mt('You must select either only anonymous or only named problems.').'\n\n'.&mt('If a selection contains both anonymous and named parts, [_1]use the Anoymous/Named buttons to ensure selections will be either all anonymous [_1]or all named.','\n');
290: $checkanonjs = <<"END";
291:
292: <script type="text/javascript" language="JavaScript">
293: function checkanon() {
294: anoncount = 0;
295: namedcount = 0;
296: for (i=0; i<document.forms.$formname.elements.length; i++) {
297: ele = document.forms.$formname.elements[i];
298: if (ele.name == '$inputname') {
299: itemid = document.forms.$formname.elements[i].id;
300: if (document.forms.$formname.elements[i].checked) {
301: anonid = 'anonymous_'+itemid;
302: mixid = 'mixed_'+itemid;
303: anonele = document.getElementById(anonid);
304: mixele = document.getElementById(mixid);
305: if (anonele.value > 0) {
306: if (mixele.value == 'none') {
307: anoncount ++;
308: } else {
309: if (mixele.value == '0') {
310: if (mixele.checked) {
311: anoncount ++;
312: } else {
313: namedcount ++;
314: }
315: } else {
316: namedcount ++;
317: }
318: }
319: } else {
320: namedcount ++;
321: }
322: }
323: }
324: }
325: if (anoncount > 0 && namedcount > 0) {
326: alert("$anonwarning");
327: return false;
328: }
329: }
330: </script>
331:
332: END
333: }
334: }
335: $Str .= $checkanonjs.
336: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
337: (' 'x4).
338: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
339: $Str .= $/.'<table>'.$/;
340: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
341: my $sequence_string;
342: my $seq_id = 0;
343: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
344: '',
345: '',
346: $seq_id++,
347: $inputname));
348: my @Sequence_Data;
349: while (my $curRes = $iterator->next()) {
350: if ($curRes == $iterator->END_MAP) {
351: if (ref($Accumulator[-1]) eq 'CODE') {
352: my $old_accumulator = pop(@Accumulator);
353: push(@Sequence_Data,&{$old_accumulator}());
354: }
355: } elsif ($curRes == $iterator->BEGIN_MAP) {
356: # Not much to do here.
357: }
358: next if (! ref($curRes));
359: if ($curRes->is_map) {
360: push(@Accumulator,&new_accumulator($curRes->compTitle,
361: $curRes->src,
362: $curRes->symb,
363: $seq_id++,
364: $inputname));
365: } elsif ($curRes->is_problem) {
366: my $anonpart = 0;
367: my $namedpart = 0;
368: my @parts = @{$curRes->parts()};
369: if (ref($anoncounter) eq 'HASH') {
370: if (keys(%{$anoncounter}) > 0) {
371: my @parts = @{$curRes->parts()};
372: my $symb = $curRes->symb();
373: foreach my $part (@parts) {
374: if ((exists($anoncounter->{$symb."\0".$part})) ||
375: $curRes->is_anonsurvey($part)) {
376: $anonpart ++;
377: } else {
378: $namedpart ++
379: }
380: }
381: }
382: }
383: if (@Accumulator && $Accumulator[-1] ne '') {
384: &{$Accumulator[-1]}($curRes,
385: exists($selected->{$curRes->symb}),
386: $anonpart,$namedpart);
387: }
388: }
389: }
390: my $course_seq = pop(@Sequence_Data);
391: foreach my $seq ($course_seq,@Sequence_Data) {
392: #my $seq = pop(@Sequence_Data);
393: next if (! defined($seq) || ref($seq) ne 'HASH');
394: $Str.= '<tr><td colspan="2">'.
395: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
396: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
397: &mt('Select').'</a>'.(' 'x2).
398: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
399: &mt('Unselect').'</a>'.(' 'x2).
400: '</td></tr>'.$/;
401: $Str.= $seq->{'html'};
402: }
403: $Str .= '</table>'.$/;
404: return $Str;
405: }
406:
407: sub new_accumulator {
408: my ($title,$src,$symb,$seq_id,$inputname) = @_;
409: my $target;
410: my $item_id=0;
411: return
412: sub {
413: if (@_) {
414: my ($res,$checked,$anonpart,$namedpart) = @_;
415: $target.='<tr><td><label>'.
416: '<input type="checkbox" name="'.$inputname.'" ';
417: if ($checked) {
418: $target .= 'checked="checked" ';
419: }
420: my $anon_id = $item_id;
421: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
422: my $esc_symb = &escape($res->symb);
423: $target.=
424: 'value="'.$esc_symb.'" />'.
425: ' '.$res->compTitle.'</label>'.
426: (' 'x2).'<a target="preview" '.
427: 'href="'.$res->link.'?symb='.
428: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
429: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
430: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
431: if ($anonpart) {
432: if ($namedpart) {
433: my $checknamed = '';
434: my $checkedanon = ' checked="checked"';
435: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
436: $checknamed = $checkedanon;
437: $checkedanon = '';
438: }
439: $mixed = ' ('.
440: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
441: '<span class="LC_nobreak"><label>'.
442: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
443: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
444: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
445: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
446: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
447: '</label></span>').')';
448: } else {
449: $target .= ' '.&mt('(Anonymous Survey)');
450: }
451: }
452: $target.= $mixed.'</td></tr>'.$/;
453: } else {
454: if (defined($target)) {
455: return { title => $title,
456: symb => $symb,
457: src => $src,
458: id => $seq_id,
459: html => $target, };
460: }
461: return undef;
462: }
463: };
464: }
465:
466: sub get_selected_symbs {
467: my ($inputfield) = @_;
468: my $field = 'form.'.$inputfield;
469: my @symbs = (map {
470: &unescape($_);
471: } &Apache::loncommon::get_env_multiple($field));
472: return @symbs;
473: }
474:
475: ####################################################
476: ####################################################
477:
478: =pod
479:
480: =item &make_target_id($target)
481:
482: Inputs: Hash ref with the following entries:
483: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
484: $target->{'resptype'}.
485:
486: Returns: A string, suitable for a form parameter, which uniquely identifies
487: the problem, part, and response to do statistical analysis on.
488:
489: Used by Apache::lonstathelpers::ProblemSelector().
490:
491: =cut
492:
493: ####################################################
494: ####################################################
495: sub make_target_id {
496: my ($target) = @_;
497: my $id = &escape($target->{'symb'}).':'.
498: &escape($target->{'part'}).':'.
499: &escape($target->{'respid'}).':'.
500: &escape($target->{'resptype'});
501: return $id;
502: }
503:
504: ####################################################
505: ####################################################
506:
507: =pod
508:
509: =item &get_target_from_id($id)
510:
511: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
512:
513: Returns: A hash reference, $target, containing the following keys:
514: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
515: $target->{'resptype'}.
516:
517: =cut
518:
519: ####################################################
520: ####################################################
521: sub get_target_from_id {
522: my ($id) = @_;
523: if (! ref($id)) {
524: my ($symb,$part,$respid,$resptype) = split(':',$id);
525: return ({ symb => &unescape($symb),
526: part => &unescape($part),
527: respid => &unescape($respid),
528: resptype => &unescape($resptype)});
529: } elsif (ref($id) eq 'ARRAY') {
530: my @Return;
531: foreach my $selected (@$id) {
532: my ($symb,$part,$respid,$resptype) = split(':',$selected);
533: push(@Return,{ symb => &unescape($symb),
534: part => &unescape($part),
535: respid => &unescape($respid),
536: resptype => &unescape($resptype)});
537: }
538: return \@Return;
539: }
540: }
541:
542: ####################################################
543: ####################################################
544:
545: =pod
546:
547: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
548:
549: Determine the problem parts or responses preceeding and following the
550: current resource.
551:
552: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
553: $AcceptableResponseTypes, regular expression matching acceptable
554: response types,
555: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
556:
557: Returns: three hash references, $prev, $curr, $next, which refer to the
558: preceeding, current, or following problem parts or responses, depending
559: on the value of $granularity. Values of undef indicate there is no
560: previous or next part/response. A value of undef for all three indicates
561: there was no match found to the current part/resource.
562:
563: The hash references contain the following keys:
564: symb, part, resource
565:
566: If $granularity eq 'response', the following ADDITIONAL keys will be present:
567: respid, resptype
568:
569: =cut
570:
571: ####################################################
572: ####################################################
573: sub get_prev_curr_next {
574: my ($target,$AcceptableResponseTypes,$granularity) = @_;
575: #
576: # Build an array with the data we need to search through
577: my @Resource;
578: my ($navmap,@sequences) =
579: &Apache::lonstatistics::selected_sequences_with_assessments('all');
580: return $navmap if (! ref($navmap));
581: foreach my $seq (@sequences) {
582: my @resources = &get_resources($navmap,$seq);
583: foreach my $res (@resources) {
584: foreach my $part (@{$res->parts}) {
585: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
586: ($granularity eq 'part_survey')) {
587: push (@Resource,
588: { symb => $res->symb,
589: part => $part,
590: resource => $res,
591: } );
592: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
593: push (@Resource,
594: { symb => $res->symb,
595: part => $part,
596: resource => $res,
597: } );
598: } elsif ($granularity eq 'part') {
599: push (@Resource,
600: { symb => $res->symb,
601: part => $part,
602: resource => $res,
603: } );
604: } elsif ($granularity eq 'response') {
605: my @response_ids = $res->responseIds($part);
606: my @response_types = $res->responseType($part);
607: for (my $i=0;
608: $i<scalar(@response_ids);
609: $i++){
610: my $respid = $response_ids[$i];
611: my $resptype = $response_types[$i];
612: next if ($resptype !~ m/$AcceptableResponseTypes/);
613: push (@Resource,
614: { symb => $res->symb,
615: part => $part,
616: respid => $respid,
617: resptype => $resptype,
618: resource => $res,
619: } );
620: }
621: }
622: }
623: }
624: }
625: #
626: # Get the index of the current situation
627: my $curr_idx;
628: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
629: my $curr_item = $Resource[$curr_idx];
630: if ($granularity =~ /^(part|part_survey|part_task)$/) {
631: if ($curr_item->{'symb'} eq $target->{'symb'} &&
632: $curr_item->{'part'} eq $target->{'part'}) {
633: last;
634: }
635: } elsif ($granularity eq 'response') {
636: if ($curr_item->{'symb'} eq $target->{'symb'} &&
637: $curr_item->{'part'} eq $target->{'part'} &&
638: $curr_item->{'respid'} eq $target->{'respid'} &&
639: $curr_item->{'resptype'} eq $target->{'resptype'}) {
640: last;
641: }
642: }
643: }
644: my $curr_item = $Resource[$curr_idx];
645: if ($granularity =~ /^(part|part_survey|part_task)$/) {
646: if ($curr_item->{'symb'} ne $target->{'symb'} ||
647: $curr_item->{'part'} ne $target->{'part'}) {
648: # bogus symb - return nothing
649: return (undef,undef,undef);
650: }
651: } elsif ($granularity eq 'response') {
652: if ($curr_item->{'symb'} ne $target->{'symb'} ||
653: $curr_item->{'part'} ne $target->{'part'} ||
654: $curr_item->{'respid'} ne $target->{'respid'} ||
655: $curr_item->{'resptype'} ne $target->{'resptype'}){
656: # bogus symb - return nothing
657: return (undef,undef,undef);
658: }
659: }
660: #
661: # Now just pick up the data we need
662: my ($prev,$curr,$next);
663: if ($curr_idx == 0) {
664: $prev = undef;
665: $curr = $Resource[$curr_idx ];
666: $next = $Resource[$curr_idx+1];
667: } elsif ($curr_idx == $#Resource) {
668: $prev = $Resource[$curr_idx-1];
669: $curr = $Resource[$curr_idx ];
670: $next = undef;
671: } else {
672: $prev = $Resource[$curr_idx-1];
673: $curr = $Resource[$curr_idx ];
674: $next = $Resource[$curr_idx+1];
675: }
676: return ($navmap,$prev,$curr,$next);
677: }
678:
679:
680: #####################################################
681: #####################################################
682:
683: =pod
684:
685: =item GetStudentAnswers($r,$problem,$Students)
686:
687: Determines the correct answer for a set of students on a given problem.
688: The students answers are stored in the student hashes pointed to by the
689: array @$Students under the key 'answer'.
690:
691: Inputs: $r
692: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
693: $Students: reference to array containing student hashes (need 'username',
694: 'domain').
695:
696: Returns: nothing
697:
698: =cut
699:
700: #####################################################
701: #####################################################
702: sub GetStudentAnswers {
703: my ($r,$problem,$Students,$formname,$inputname) = @_;
704: my %answers;
705: my $status_type;
706: if (defined($formname)) {
707: $status_type = 'inline';
708: } else {
709: $status_type = 'popup';
710: }
711: my $c = $r->connection();
712: my %Answers;
713: my ($resource,$partid,$respid) = ($problem->{'resource'},
714: $problem->{'part'},
715: $problem->{'respid'});
716: # Read in the cache (if it exists) before we start timing things.
717: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
718: # Open progress window
719: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
720: ($r,'Student Answer Compilation Status',
721: 'Student Answer Compilation Progress', scalar(@$Students),
722: $status_type,undef,$formname,$inputname);
723: $r->rflush();
724: foreach my $student (@$Students) {
725: last if ($c->aborted());
726: my $sname = $student->{'username'};
727: my $sdom = $student->{'domain'};
728: my $answer = &Apache::lonstathelpers::get_student_answer
729: ($resource,$sname,$sdom,$partid,$respid);
730: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
731: 'last student');
732: $answers{$answer}++;
733: $student->{'answer'} = $answer;
734: }
735: &Apache::lonstathelpers::write_analysis_cache();
736: return if ($c->aborted());
737: $r->rflush();
738: # close progress window
739: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
740: return \%answers;
741: }
742:
743: #####################################################
744: #####################################################
745:
746: =pod
747:
748: =item analyze_problem_as_student
749:
750: Analyzes a homework problem for a student
751:
752: Inputs: $resource: a resource object
753: $sname, $sdom, $partid, $respid
754:
755: Returns: the problem analysis hash
756:
757: =cut
758:
759: #####################################################
760: #####################################################
761: sub analyze_problem_as_student {
762: my ($resource,$sname,$sdom) = @_;
763: if (ref($resource) ne 'HASH') {
764: my $res = $resource;
765: $resource = { 'src' => $res->src,
766: 'symb' => $res->symb,
767: 'parts' => $res->parts };
768: foreach my $part (@{$resource->{'parts'}}) {
769: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
770: [$res->responseIds($part)];
771: }
772: }
773: my $url = $resource->{'src'};
774: my $symb = $resource->{'symb'};
775: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
776: if (! defined($analysis)) {
777: my $courseid = $env{'request.course.id'};
778: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
779: 'grade_domain' => $sdom,
780: 'grade_username' => $sname,
781: 'grade_symb' => $symb,
782: 'grade_courseid' => $courseid));
783: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
784: &store_analysis($sname,$sdom,$symb,$analysis);
785: }
786: my %Answer=&Apache::lonnet::str2hash($analysis);
787: #
788: return \%Answer;
789: }
790:
791: #####################################################
792: #####################################################
793:
794: =pod
795:
796: =item get_student_answer
797:
798: Analyzes a homework problem for a particular student and returns the correct
799: answer. Attempts to put together an answer for problem types
800: that do not natively support it.
801:
802: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
803: $sname, $sdom, $partid, $respid
804:
805: Returns: $answer
806:
807: If $partid and $respid are specified, $answer is simply a scalar containing
808: the correct answer for the response.
809:
810: If $partid or $respid are undefined, $answer will be a hash reference with
811: keys $partid.'.'.$respid.'.answer'.
812:
813: =cut
814:
815: #####################################################
816: #####################################################
817: sub get_student_answer {
818: my ($resource,$sname,$sdom,$partid,$respid) = @_;
819: #
820: if (ref($resource) ne 'HASH') {
821: my $res = $resource;
822: $resource = { 'src' => $res->src,
823: 'symb' => $res->symb,
824: 'parts' => $res->parts };
825: foreach my $part (@{$resource->{'parts'}}) {
826: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
827: [$res->responseIds($part)];
828: }
829: }
830: #
831: my $analysis =
832: &analyze_problem_as_student($resource,$sname,$sdom);
833: my $answer;
834: foreach my $partid (@{$resource->{'parts'}}) {
835: my $partdata = $resource->{'partdata'}->{$partid};
836: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
837: my $prefix = $partid.'.'.$respid;
838: my $key = $prefix.'.answer';
839: $answer->{$partid}->{$respid} =
840: &get_answer($prefix,$key,%$analysis);
841: }
842: }
843: my $returnvalue;
844: if (! defined($partid)) {
845: $returnvalue = $answer;
846: } elsif (! defined($respid)) {
847: $returnvalue = $answer->{$partid};
848: } else {
849: $returnvalue = $answer->{$partid}->{$respid};
850: }
851: return $returnvalue;
852: }
853:
854: sub get_answer {
855: my ($prefix,$key,%Answer) = @_;
856: my $returnvalue;
857: if (exists($Answer{$key})) {
858: if (ref($Answer{$key}) eq 'HASH') {
859: my $which = 'INTERNAL';
860: if (!exists($Answer{$key}{$which})) {
861: $which = (sort(keys(%{ $Answer{$key} })))[0];
862: }
863: my $student_answer = $Answer{$key}{$which}[0][0];
864: $returnvalue = $student_answer;
865: } else {
866: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
867: }
868: } else {
869: if (exists($Answer{$prefix.'.shown'})) {
870: # The response has foils
871: my %values;
872: while (my ($k,$v) = each(%Answer)) {
873: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
874: my $foilname = $2;
875: $values{$foilname}=$v;
876: }
877: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
878: if (ref($values{$foil}) eq 'ARRAY') {
879: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
880: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
881: } else {
882: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
883: &HTML::Entities::encode($values{$foil},'<>&"').'&';
884: }
885: }
886: $returnvalue =~ s/ /\%20/g;
887: chop ($returnvalue);
888: }
889: }
890: return $returnvalue;
891: }
892:
893: #####################################################
894: #####################################################
895:
896: =pod
897:
898: =item Caching routines
899:
900: =over 4
901:
902: =item &load_analysis_cache($symb)
903:
904: Loads the cache for the given symb into memory from disk.
905: Requires the cache filename be set.
906: Only should be called by &ensure_proper_cache.
907:
908: =cut
909:
910: #####################################################
911: #####################################################
912: {
913: my $cache_filename = undef;
914: my $current_symb = undef;
915: my %cache;
916:
917: sub load_analysis_cache {
918: my ($symb) = @_;
919: return if (! defined($cache_filename));
920: if (! defined($current_symb) || $current_symb ne $symb) {
921: undef(%cache);
922: my $storedstring;
923: my %cache_db;
924: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
925: $storedstring = $cache_db{&escape($symb)};
926: untie(%cache_db);
927: }
928: if (defined($storedstring)) {
929: %cache = %{thaw($storedstring)};
930: }
931: }
932: return;
933: }
934:
935: #####################################################
936: #####################################################
937:
938: =pod
939:
940: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
941:
942: Returns the appropriate data from the cache, or undef if no data exists.
943:
944: =cut
945:
946: #####################################################
947: #####################################################
948: sub get_from_analysis_cache {
949: my ($sname,$sdom,$symb) = @_;
950: &ensure_proper_cache($symb);
951: my $returnvalue;
952: if (exists($cache{$sname.':'.$sdom})) {
953: $returnvalue = $cache{$sname.':'.$sdom};
954: } else {
955: $returnvalue = undef;
956: }
957: return $returnvalue;
958: }
959:
960: #####################################################
961: #####################################################
962:
963: =pod
964:
965: =item &write_analysis_cache($symb)
966:
967: Writes the in memory cache to disk so that it can be read in with
968: &load_analysis_cache($symb).
969:
970: =cut
971:
972: #####################################################
973: #####################################################
974: sub write_analysis_cache {
975: return if (! defined($current_symb) || ! defined($cache_filename));
976: my %cache_db;
977: my $key = &escape($current_symb);
978: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
979: my $storestring = freeze(\%cache);
980: $cache_db{$key}=$storestring;
981: $cache_db{$key.'.time'}=time;
982: untie(%cache_db);
983: }
984: undef(%cache);
985: undef($current_symb);
986: undef($cache_filename);
987: return;
988: }
989:
990: #####################################################
991: #####################################################
992:
993: =pod
994:
995: =item &ensure_proper_cache($symb)
996:
997: Called to make sure we have the proper cache set up. This is called
998: prior to every analysis lookup.
999:
1000: =cut
1001:
1002: #####################################################
1003: #####################################################
1004: sub ensure_proper_cache {
1005: my ($symb) = @_;
1006: my $cid = $env{'request.course.id'};
1007: my $new_filename = LONCAPA::tempdir() .
1008: 'problemanalysis_'.$cid.'_analysis_cache.db';
1009: if (! defined($cache_filename) ||
1010: $cache_filename ne $new_filename ||
1011: ! defined($current_symb) ||
1012: $current_symb ne $symb) {
1013: $cache_filename = $new_filename;
1014: # Notice: $current_symb is not set to $symb until after the cache is
1015: # loaded. This is what tells &load_analysis_cache to load in a new
1016: # symb cache.
1017: &load_analysis_cache($symb);
1018: $current_symb = $symb;
1019: }
1020: }
1021:
1022: #####################################################
1023: #####################################################
1024:
1025: =pod
1026:
1027: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1028:
1029: Stores the analysis data in the in memory cache.
1030:
1031: =cut
1032:
1033: #####################################################
1034: #####################################################
1035: sub store_analysis {
1036: my ($sname,$sdom,$symb,$dataset) = @_;
1037: return if ($symb ne $current_symb);
1038: $cache{$sname.':'.$sdom}=$dataset;
1039: return;
1040: }
1041:
1042: }
1043: #####################################################
1044: #####################################################
1045:
1046: =pod
1047:
1048: =back
1049:
1050: =cut
1051:
1052: #####################################################
1053: #####################################################
1054:
1055: ##
1056: ## The following is copied from datecalc1.pl, part of the
1057: ## Spreadsheet::WriteExcel CPAN module.
1058: ##
1059: ##
1060: ######################################################################
1061: #
1062: # Demonstration of writing date/time cells to Excel spreadsheets,
1063: # using UNIX/Perl time as source of date/time.
1064: #
1065: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1066: #
1067: ######################################################################
1068: #
1069: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1070: # measured in seconds.
1071: #
1072: # An Excel file can use exactly one of two different date/time systems.
1073: # In these systems, a floating point number represents the number of days
1074: # (and fractional parts of the day) since a start point. The floating point
1075: # number is referred to as a 'serial'.
1076: # The two systems ('1900' and '1904') use different starting points:
1077: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1078: # a leap year - see:
1079: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1080: # for the excuse^H^H^H^H^H^Hreason.
1081: # '1904'; '1.00' is 2 Jan 1904.
1082: #
1083: # The '1904' system is the default for Apple Macs. Windows versions of
1084: # Excel have the option to use the '1904' system.
1085: #
1086: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1087: # regard 1900 as a leap year, and thus its serials do not agree with
1088: # the 1900 serials of Excel for dates before 1 Mar 1900.
1089: #
1090: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1091: # regard 1900 as a leap year, and thus its serials do not agree with
1092: # the 1900 serials of Excel for dates before 1 Mar 1900.
1093: #
1094: ######################################################################
1095: #
1096: # Calculation description
1097: # =======================
1098: #
1099: # 1900 system
1100: # -----------
1101: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1102: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1103: # were leap years with an extra day.
1104: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1105: # 1 Jan 1970.
1106: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1107: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1108: #
1109: # 1904 system
1110: # -----------
1111: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1112: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1113: # were leap years with an extra day.
1114: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1115: # 1 Jan 1970.
1116: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1117: #
1118: ######################################################################
1119: #
1120: # Copyright (c) 2000, Andrew Benham.
1121: # This program is free software. It may be used, redistributed and/or
1122: # modified under the same terms as Perl itself.
1123: #
1124: # Andrew Benham, adsb@bigfoot.com
1125: # London, United Kingdom
1126: # 11 Nov 2000
1127: #
1128: ######################################################################
1129: #-----------------------------------------------------------
1130: # calc_serial()
1131: #
1132: # Called with (up to) 2 parameters.
1133: # 1. Unix timestamp. If omitted, uses current time.
1134: # 2. GMT flag. Set to '1' to return serial in GMT.
1135: # If omitted, returns serial in appropriate timezone.
1136: #
1137: # Returns date/time serial according to $DATE_SYSTEM selected
1138: #-----------------------------------------------------------
1139: sub calc_serial {
1140: # Use 1900 date system on all platforms other than Apple Mac (for which
1141: # use 1904 date system).
1142: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1143: my $time = (defined $_[0]) ? $_[0] : time();
1144: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1145: #
1146: # Divide timestamp by number of seconds in a day.
1147: # This gives a date serial with '0' on 1 Jan 1970.
1148: my $serial = $time / 86400;
1149: #
1150: # Adjust the date serial by the offset appropriate to the
1151: # currently selected system (1900/1904).
1152: if ($DATE_SYSTEM == 0) { # use 1900 system
1153: $serial += 25569;
1154: } else { # use 1904 system
1155: $serial += 24107;
1156: }
1157: #
1158: unless ($gmtflag) {
1159: # Now have a 'raw' serial with the right offset. But this
1160: # gives a serial in GMT, which is false unless the timezone
1161: # is GMT. We need to adjust the serial by the appropriate
1162: # timezone offset.
1163: # Calculate the appropriate timezone offset by seeing what
1164: # the differences between localtime and gmtime for the given
1165: # time are.
1166: #
1167: my @gmtime = gmtime($time);
1168: my @ltime = localtime($time);
1169: #
1170: # For the first 7 elements of the two arrays, adjust the
1171: # date serial where the elements differ.
1172: for (0 .. 6) {
1173: my $diff = $ltime[$_] - $gmtime[$_];
1174: if ($diff) {
1175: $serial += _adjustment($diff,$_);
1176: }
1177: }
1178: }
1179: #
1180: # Perpetuate the error that 1900 was a leap year by decrementing
1181: # the serial if we're using the 1900 system and the date is prior to
1182: # 1 Mar 1900. This has the effect of making serial value '60'
1183: # 29 Feb 1900.
1184: #
1185: # This fix only has any effect if UNIX/Perl time on the platform
1186: # can represent 1900. Many can't.
1187: #
1188: unless ($DATE_SYSTEM) {
1189: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1190: }
1191: return $serial;
1192: }
1193:
1194: sub _adjustment {
1195: # Based on the difference in the localtime/gmtime array elements
1196: # number, return the adjustment required to the serial.
1197: #
1198: # We only look at some elements of the localtime/gmtime arrays:
1199: # seconds unlikely to be different as all known timezones
1200: # have an offset of integral multiples of 15 minutes,
1201: # but it's easy to do.
1202: # minutes will be different for timezone offsets which are
1203: # not an exact number of hours.
1204: # hours very likely to be different.
1205: # weekday will differ when localtime/gmtime difference
1206: # straddles midnight.
1207: #
1208: # Assume that difference between localtime and gmtime is less than
1209: # 5 days, then don't have to do maths for day of month, month number,
1210: # year number, etc...
1211: #
1212: my ($delta,$element) = @_;
1213: my $adjust = 0;
1214: #
1215: if ($element == 0) { # Seconds
1216: $adjust = $delta/86400; # 60 * 60 * 24
1217: } elsif ($element == 1) { # Minutes
1218: $adjust = $delta/1440; # 60 * 24
1219: } elsif ($element == 2) { # Hours
1220: $adjust = $delta/24; # 24
1221: } elsif ($element == 6) { # Day of week number
1222: # Catch difference straddling Sat/Sun in either direction
1223: $delta += 7 if ($delta < -4);
1224: $delta -= 7 if ($delta > 4);
1225: #
1226: $adjust = $delta;
1227: }
1228: return $adjust;
1229: }
1230:
1231: ###########################################################
1232: ###########################################################
1233:
1234: =pod
1235:
1236: =item get_problem_data
1237:
1238: Returns a data structure describing the problem.
1239:
1240: Inputs: $url
1241:
1242: Returns: %Partdata
1243:
1244: =cut
1245:
1246: ## note: we must force each foil and option to not begin or end with
1247: ## spaces as they are stored without such data.
1248: ##
1249: ###########################################################
1250: ###########################################################
1251: sub get_problem_data {
1252: my ($url) = @_;
1253: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1254: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1255: my %Answer;
1256: %Answer=&Apache::lonnet::str2hash($Answ);
1257: my %Partdata;
1258: foreach my $part (@{$Answer{'parts'}}) {
1259: while (my($key,$value) = each(%Answer)) {
1260: #
1261: # Logging code:
1262: if (0) {
1263: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1264: if (ref($value) eq 'ARRAY') {
1265: &Apache::lonnet::logthis(' @'.join(',',@$value));
1266: } else {
1267: &Apache::lonnet::logthis(' '.$value);
1268: }
1269: }
1270: # End of logging code
1271: next if ($key !~ /^\Q$part\E/);
1272: $key =~ s/^\Q$part\E\.//;
1273: if (ref($value) eq 'ARRAY') {
1274: if ($key eq 'options') {
1275: $Partdata{$part}->{'_Options'}=$value;
1276: } elsif ($key eq 'concepts') {
1277: $Partdata{$part}->{'_Concepts'}=$value;
1278: } elsif ($key eq 'items') {
1279: $Partdata{$part}->{'_Items'}=$value;
1280: } elsif ($key =~ /^concept\.(.*)$/) {
1281: my $concept = $1;
1282: foreach my $foil (@$value) {
1283: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1284: $concept;
1285: }
1286: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1287: $Partdata{$part}->{$key}=$value;
1288: }
1289: } else {
1290: if ($key=~ /^foil\.text\.(.*)$/) {
1291: my $foil = $1;
1292: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1293: $value =~ s/(\s*$|^\s*)//g;
1294: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1295: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1296: my $foil = $1;
1297: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1298: } elsif ($key eq 'answercomputed') {
1299: $Partdata{$part}->{'answercomputed'} = $value;
1300: }
1301: }
1302: }
1303: }
1304: # Further debugging code
1305: if (0) {
1306: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1307: &log_hash_ref(\%Partdata);
1308: }
1309: return %Partdata;
1310: }
1311:
1312: sub log_array_ref {
1313: my ($arrayref,$prefix) = @_;
1314: return if (ref($arrayref) ne 'ARRAY');
1315: if (! defined($prefix)) { $prefix = ''; };
1316: foreach my $v (@$arrayref) {
1317: if (ref($v) eq 'ARRAY') {
1318: &log_array_ref($v,$prefix.' ');
1319: } elsif (ref($v) eq 'HASH') {
1320: &log_hash_ref($v,$prefix.' ');
1321: } else {
1322: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1323: }
1324: }
1325: }
1326:
1327: sub log_hash_ref {
1328: my ($hashref,$prefix) = @_;
1329: return if (ref($hashref) ne 'HASH');
1330: if (! defined($prefix)) { $prefix = ''; };
1331: while (my ($k,$v) = each(%$hashref)) {
1332: if (ref($v) eq 'ARRAY') {
1333: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1334: &log_array_ref($v,$prefix.' ');
1335: } elsif (ref($v) eq 'HASH') {
1336: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1337: &log_hash_ref($v,$prefix.' ');
1338: } else {
1339: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1340: }
1341: }
1342: }
1343: ####################################################
1344: ####################################################
1345:
1346: =pod
1347:
1348: =item &limit_by_time()
1349:
1350: =cut
1351:
1352: ####################################################
1353: ####################################################
1354: sub limit_by_time_form {
1355: my $Starttime_form = '';
1356: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1357: ('limitby_startdate');
1358: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1359: ('limitby_enddate');
1360: if (! defined($endtime)) {
1361: $endtime = time;
1362: }
1363: if (! defined($starttime)) {
1364: $starttime = $endtime - 60*60*24*7;
1365: }
1366: my $state;
1367: if (&limit_by_time()) {
1368: $state = '';
1369: } else {
1370: $state = 'disabled';
1371: }
1372: my $startdateform = &Apache::lonhtmlcommon::date_setter
1373: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1374: my $enddateform = &Apache::lonhtmlcommon::date_setter
1375: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1376: my $Str;
1377: $Str .= '<script type="text/javascript" language="JavaScript">';
1378: $Str .= 'function toggle_limitby_activity(state) {';
1379: $Str .= ' if (state) {';
1380: $Str .= ' limitby_startdate_enable();';
1381: $Str .= ' limitby_enddate_enable();';
1382: $Str .= ' } else {';
1383: $Str .= ' limitby_startdate_disable();';
1384: $Str .= ' limitby_enddate_disable();';
1385: $Str .= ' }';
1386: $Str .= '}';
1387: $Str .= '</script>';
1388: $Str .= '<fieldset>';
1389: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1390: if (&limit_by_time()) {
1391: $timecheckbox .= ' checked ';
1392: }
1393: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1394: $timecheckbox .= ' />';
1395: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1396: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1397: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1398: $Str .= '</fieldset>';
1399: return $Str;
1400: }
1401:
1402: sub limit_by_time {
1403: if (exists($env{'form.limit_by_time'}) &&
1404: $env{'form.limit_by_time'} ne '' ) {
1405: return 1;
1406: } else {
1407: return 0;
1408: }
1409: }
1410:
1411: sub get_time_limits {
1412: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1413: ('limitby_startdate');
1414: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1415: ('limitby_enddate');
1416: return ($starttime,$endtime);
1417: }
1418:
1419: ####################################################
1420: ####################################################
1421:
1422: =pod
1423:
1424: =item &manage_caches
1425:
1426: Inputs: $r, apache request object
1427:
1428: Returns: An array of scalars containing html for buttons.
1429:
1430: =cut
1431:
1432: ####################################################
1433: ####################################################
1434: sub manage_caches {
1435: my ($r,$formname,$inputname,$update_message) = @_;
1436: &Apache::loncoursedata::clear_internal_caches();
1437: my $sectionkey =
1438: join(',',
1439: map {
1440: &escape($_);
1441: } sort(&Apache::lonstatistics::get_selected_sections())
1442: );
1443: my $statuskey = $Apache::lonstatistics::enrollment_status;
1444: if (exists($env{'form.ClearCache'}) ||
1445: exists($env{'form.updatecaches'}) ||
1446: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1447: (exists($env{'form.prevsection'}) &&
1448: $env{'form.prevsection'} ne $sectionkey) ||
1449: (exists($env{'form.prevenrollstatus'}) &&
1450: $env{'form.prevenrollstatus'} ne $statuskey)
1451: ) {
1452: if (defined($update_message)) {
1453: $r->print($update_message);
1454: }
1455: if (0) {
1456: &Apache::lonnet::logthis('Updating mysql student data caches');
1457: }
1458: &gather_full_student_data($r,$formname,$inputname);
1459: }
1460: #
1461: my @Buttons =
1462: ('<input type="submit" name="ClearCache" '.
1463: 'value="'.&mt('Clear Caches').'" />',
1464: '<input type="submit" name="updatecaches" '.
1465: 'value="'.&mt('Update Caches').'" />'.
1466: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1467: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1468: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1469: );
1470: #
1471: if (! exists($env{'form.firstrun'})) {
1472: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1473: } else {
1474: $r->print('<input type="hidden" name="firstrun" value="no" />');
1475: }
1476: #
1477: return @Buttons;
1478: }
1479:
1480: sub gather_full_student_data {
1481: my ($r,$formname,$inputname) = @_;
1482: my $status_type;
1483: if (defined($formname)) {
1484: $status_type = 'inline';
1485: } else {
1486: $status_type = 'popup';
1487: }
1488: my $c = $r->connection();
1489: #
1490: &Apache::loncoursedata::clear_internal_caches();
1491: #
1492: my @Students = @Apache::lonstatistics::Students;
1493: #
1494: # Open the progress window
1495: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
1496: ($r,&mt('Student Data Compilation Status'),
1497: &mt('Student Data Compilation Progress'), scalar(@Students),
1498: $status_type,undef,$formname,$inputname);
1499: #
1500: while (my $student = shift @Students) {
1501: return if ($c->aborted());
1502: my $status = &Apache::loncoursedata::ensure_current_full_data
1503: ($student->{'username'},$student->{'domain'},
1504: $env{'request.course.id'});
1505: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1506: &mt('last student'));
1507: }
1508: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1509: $r->rflush();
1510: return;
1511: }
1512:
1513: ####################################################
1514: ####################################################
1515:
1516: =pod
1517:
1518: =item &submission_report_form
1519:
1520: Input: The originating reportSelected value for the current stats page.
1521:
1522: Output: Scalar containing HTML with needed form elements and a link to
1523: the student submission reports page.
1524:
1525: =cut
1526:
1527: ####################################################
1528: ####################################################
1529: sub submission_report_form {
1530: my ($original_report) = @_;
1531: # Note: In the link below we change the reportSelected value. If
1532: # the user hits the 'back' button on the browser after getting their
1533: # student submissions report, this value may still be around. So we
1534: # output a script block to set it properly. If the $original_report
1535: # value is unset, you are just asking for trouble.
1536: if (! defined($original_report)) {
1537: &Apache::lonnet::logthis
1538: ('someone called lonstathelpers::submission_report_form without '.
1539: ' enough input.');
1540: }
1541: my $html = $/.
1542: '<script type="text/javascript" language="JavaScript">'.
1543: "document.Statistics.reportSelected.value='$original_report';".
1544: '</script>'.
1545: '<input type="hidden" name="correctans" value="true" />'.
1546: '<input type="hidden" name="prob_status" value="true" />'.
1547: '<input type="hidden" name="all_sub" value="true" />';
1548: my $output_selector = $/.'<select name="output">'.$/;
1549: foreach ('HTML','Excel','CSV') {
1550: $output_selector .= ' <option value="'.lc($_).'"';
1551: if ($env{'form.output'} eq lc($_)) {
1552: $output_selector .= ' selected ';
1553: }
1554: $output_selector .='>'.&mt($_).'</option>'.$/;
1555: }
1556: $output_selector .= '</select>'.$/;
1557: my $link = '<a href="javascript:'.
1558: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1559: 'document.Statistics.submit();">';
1560: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1561: $link,'</a>').$/;
1562: return $html
1563: }
1564:
1565: ####################################################
1566: ####################################################
1567:
1568: =pod
1569:
1570: =back
1571:
1572: =cut
1573:
1574: ####################################################
1575: ####################################################
1576:
1577: 1;
1578:
1579: __END__
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