1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.76.2.5 2020/10/24 19:37:20 raeburn 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: $base=&Apache::lonnet::absolute_url().$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: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
93: return '<div class="LC_Box">'.
94: '<h4 class="LC_hcell">'.&mt('Problem').'</h4>'.
95: '<base href="'.$base.'" />'.$rendered_problem.
96: '</div>';
97: }
98:
99: ####################################################
100: ####################################################
101:
102: =pod
103:
104: =item &get_resources
105:
106: =cut
107:
108: ####################################################
109: ####################################################
110: sub get_resources {
111: my ($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,
139: $byres,$include_tools,$smallbox,$onclick) = @_;
140: # all: also make sequences selectable
141: # prefix: prefix for all form names
142: # byres: radiobutton shown per resource
143: # include_tools: external tools included
144: # smallbox: use smaller box
145: # onclick: javascript to execute when clicked
146: my $Str;
147: my $jsadd='';
148: if ($onclick) {
149: $jsadd="onclick='$onclick'";
150: }
151: $Str = &Apache::loncommon::start_scrollbox(($smallbox?'420px':'620px'),
152: ($smallbox?'400px':'600px'),
153: ($smallbox?'60px':'300px')).
154: &Apache::loncommon::start_data_table();
155: my $rb_count =0;
156: my ($navmap,@sequences) =
157: &Apache::lonstatistics::selected_sequences_with_assessments('all');
158: return $navmap if (! ref($navmap)); # error
159: foreach my $seq (@sequences) {
160: my $seq_str = '';
161: foreach my $res (&get_resources($navmap,$seq)) {
162: if ($res->src() eq '/res/lib/templates/simpleproblem.problem') {
163: next if (grep(/^placeholder$/,@{$res->parts}));
164: }
165: my $title = $res->compTitle;
166: if (! defined($title) || $title eq '') {
167: ($title) = ($res->src =~ m:/([^/]*)$:);
168: }
169: my $totalresps = 0;
170: if ($byres) {
171: foreach my $part (@{$res->parts}) {
172: $totalresps += scalar($res->responseIds($part));
173: }
174: my $value = &HTML::Entities::encode($res->symb(),'<>&"');
175: my $checked;
176: if ($env{'form.problemchoice'} eq $res->symb()) {
177: $checked = ' checked="checked"';
178: }
179: my $rowspan;
180: if ($totalresps > 1) {
181: $rowspan = ' rowspan="'.$totalresps.'"';
182: }
183: $seq_str .= &Apache::loncommon::start_data_table_row().
184: '<td'.$rowspan.' style="vertical-align:top">'.
185: '<label><input type="radio" name="symb" value="'.$value.'"'.$checked.' />'.
186: $title.'</label>';
187: my $link = $res->link.'?symb='.&escape($res->shown_symb);
188: $seq_str .= (' 'x2).
189: '<a target="preview" href="'.$link.'">'.&mt('view').'</a></td>';
190: }
191: my %partsseen;
192: foreach my $part (@{$res->parts}) {
193: my @response_ids = $res->responseIds($part);
194: my @response_types = $res->responseType($part);
195: for (my $i=0;$i<scalar(@response_types);$i++){
196: my $respid = $response_ids[$i];
197: my $resptype = $response_types[$i];
198: if ($resptype =~ m/$AcceptedResponseTypes/) {
199: if ($byres) {
200: if (exists($partsseen{$part})) {
201: $seq_str .= &Apache::loncommon::continue_data_table_row();
202: } else {
203: my $parttitle = $part;
204: if ($part eq '0') {
205: $parttitle = '';
206: }
207: if ($parttitle ne '') {
208: $parttitle = (' 'x2).&mt('part').': '.$parttitle;
209: }
210: if (keys(%partsseen)) {
211: $seq_str .= &Apache::loncommon::continue_data_table_row();
212: }
213: unless ($partsseen{$part}) {
214: my $resprowspan;
215: if (scalar(@response_ids) > 1) {
216: $resprowspan = ' rowspan="'.scalar(@response_ids).'"';
217: }
218: $seq_str .= '<td'.$resprowspan.' style="vertical-align:top">'.
219: $parttitle.'</td>';
220: $partsseen{$part} = scalar(@response_ids);
221: }
222: }
223: $seq_str .= '<td>'.$resptype;
224: if (scalar(@response_ids) > 1) {
225: $seq_str .= ' '.&mt('id').': '.$respid;
226: }
227: $seq_str .= '</td>'. &Apache::loncommon::end_data_table_row()."\n";
228: } else {
229: my $value = &make_target_id({symb=>$res->symb,
230: part=>$part,
231: respid=>$respid,
232: resptype=>$resptype});
233: my $checked = '';
234: if ($env{'form.problemchoice'} eq $value) {
235: $checked = ' checked="checked"';
236: }
237: $seq_str .= &Apache::loncommon::start_data_table_row().
238: ($symbmode?
239: '<td><input type="radio" id="'.$prefix.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' '.
240: $jsadd.
241: ' /></td>'
242: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
243: '<td><label for="'.$prefix.$rb_count.'">'.$resptype.'</label></td>'.
244: '<td><label for="'.$prefix.$rb_count.'">'.$title.'</label>';
245: if (scalar(@response_ids) > 1) {
246: $seq_str .= &mt('response').' '.$respid;
247: }
248: my $link = $res->link.'?symb='.&escape($res->shown_symb);
249: $seq_str .= (' 'x2).
250: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
251: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
252: }
253: $rb_count++;
254: }
255: }
256: }
257: }
258: if ($seq_str ne '') {
259: if ($byres) {
260: $Str .= &Apache::loncommon::start_data_table_header_row().
261: '<th colspan="3">'.$seq->compTitle.'</th>'.
262: &Apache::loncommon::end_data_table_header_row().
263: $seq_str;
264: } else {
265: $Str .= &Apache::loncommon::start_data_table_header_row().
266: '<th colspan="3">'.
267: ($all?'<input type="radio" id="'.$prefix.'s'.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($seq->symb,'<>&').'" '.$jsadd.' />':'').
268: $seq->compTitle.'</th>'.
269: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
270: if (defined($sequence_addendum)) {
271: $Str .= &Apache::loncommon::start_data_table_header_row().
272: ('<td> </td>'x2).
273: '<td align="right">'.$sequence_addendum.'</td>'.
274: &Apache::loncommon::end_data_table_header_row()."\n";
275: }
276: }
277: }
278: }
279: $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
280: if (!$rb_count) {
281: if ($byres) {
282: $Str = '<p class="LC_info">'.&mt('No gradable problems found').'</p>';
283: } elsif ($AcceptedResponseTypes eq '.') {
284: $Str = '<p class="LC_info">'.&mt('No problems found').'</p>';
285: } else {
286: $Str = '<p class="LC_info">'.&mt('No analyzable problems found').'</p>';
287: }
288: }
289: return $Str;
290: }
291:
292: ####################################################
293: ####################################################
294:
295: =pod
296:
297: =item &MultipleProblemSelector($navmap,$selected,$inputname)
298:
299: Generate HTML with checkboxes for problem selection.
300:
301: Input:
302:
303: $navmap: a navmap object. If undef, navmaps will be called to create a
304: new object.
305:
306: $selected: Scalar, Array, or hash reference of currently selected items.
307:
308: $inputname: The name of the form elements to use for the checkboxs.
309:
310: Returns: A string containing html for a table which lists the sequences
311: and their contents. A checkbox is provided for each problem.
312:
313: =cut
314:
315: ####################################################
316: ####################################################
317: sub MultipleProblemSelector {
318: my ($navmap,$inputname,$formname,$anoncounter)=@_;
319: my $cid = $env{'request.course.id'};
320: my $Str;
321: # Massage the input as needed.
322: if (! defined($navmap)) {
323: $navmap = Apache::lonnavmaps::navmap->new();
324: if (! defined($navmap)) {
325: $Str .= '<div class="LC_error">'
326: .&mt('Error: cannot process course structure')
327: .'</div>';
328: return $Str;
329: }
330: }
331: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
332: # Header
333: $Str .= <<"END";
334: <script type="text/javascript" language="JavaScript">
335: function checkall(value,seqid) {
336: for (i=0; i<document.forms.$formname.elements.length; i++) {
337: ele = document.forms.$formname.elements[i];
338: if (ele.name == '$inputname') {
339: if (seqid != null) {
340: itemid = document.forms.$formname.elements[i].id;
341: thing = itemid.split(':');
342: if (thing[0] == seqid) {
343: document.forms.$formname.elements[i].checked=value;
344: }
345: } else {
346: document.forms.$formname.elements[i].checked=value;
347: }
348: }
349: }
350: }
351: </script>
352: END
353: my $checkanonjs = <<"END";
354:
355: <script type="text/javascript" language="JavaScript">
356: function checkanon() {
357: return true;
358: }
359: </script>
360:
361: END
362: if (ref($anoncounter) eq 'HASH') {
363: if (keys(%{$anoncounter}) > 0) {
364: 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 Anonymous/Named buttons to ensure selections will be either all anonymous[_1]or all named.',"\n");
365: &js_escape(\$anonwarning);
366: $checkanonjs = <<"END";
367:
368: <script type="text/javascript" language="JavaScript">
369: function checkanon() {
370: anoncount = 0;
371: namedcount = 0;
372: for (i=0; i<document.forms.$formname.elements.length; i++) {
373: ele = document.forms.$formname.elements[i];
374: if (ele.name == '$inputname') {
375: itemid = document.forms.$formname.elements[i].id;
376: if (document.forms.$formname.elements[i].checked) {
377: anonid = 'anonymous_'+itemid;
378: mixid = 'mixed_'+itemid;
379: anonele = document.getElementById(anonid);
380: mixele = document.getElementById(mixid);
381: if (anonele.value > 0) {
382: if (mixele.value == 'none') {
383: anoncount ++;
384: } else {
385: if (mixele.value == '0') {
386: if (mixele.checked) {
387: anoncount ++;
388: } else {
389: namedcount ++;
390: }
391: } else {
392: namedcount ++;
393: }
394: }
395: } else {
396: namedcount ++;
397: }
398: }
399: }
400: }
401: if (anoncount > 0 && namedcount > 0) {
402: alert("$anonwarning");
403: return false;
404: }
405: }
406: </script>
407:
408: END
409: }
410: }
411: $Str .= $checkanonjs.
412: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
413: (' 'x4).
414: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
415: $Str .= $/.'<table>'.$/;
416: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
417: my $sequence_string;
418: my $seq_id = 0;
419: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
420: '',
421: '',
422: $seq_id++,
423: $inputname));
424: my @Sequence_Data;
425: while (my $curRes = $iterator->next()) {
426: if ($curRes == $iterator->END_MAP) {
427: if (ref($Accumulator[-1]) eq 'CODE') {
428: my $old_accumulator = pop(@Accumulator);
429: push(@Sequence_Data,&{$old_accumulator}());
430: }
431: } elsif ($curRes == $iterator->BEGIN_MAP) {
432: # Not much to do here.
433: }
434: next if (! ref($curRes));
435: if ($curRes->is_map) {
436: push(@Accumulator,&new_accumulator($curRes->compTitle,
437: $curRes->src,
438: $curRes->symb,
439: $seq_id++,
440: $inputname));
441: } elsif ($curRes->is_problem) {
442: my $anonpart = 0;
443: my $namedpart = 0;
444: my @parts = @{$curRes->parts()};
445: if (ref($anoncounter) eq 'HASH') {
446: if (keys(%{$anoncounter}) > 0) {
447: my @parts = @{$curRes->parts()};
448: my $symb = $curRes->symb();
449: foreach my $part (@parts) {
450: if ((exists($anoncounter->{$symb."\0".$part})) ||
451: $curRes->is_anonsurvey($part)) {
452: $anonpart ++;
453: } else {
454: $namedpart ++
455: }
456: }
457: }
458: }
459: if (@Accumulator && $Accumulator[-1] ne '') {
460: &{$Accumulator[-1]}($curRes,
461: exists($selected->{$curRes->symb}),
462: $anonpart,$namedpart);
463: }
464: }
465: }
466: my $course_seq = pop(@Sequence_Data);
467: foreach my $seq ($course_seq,@Sequence_Data) {
468: #my $seq = pop(@Sequence_Data);
469: next if (! defined($seq) || ref($seq) ne 'HASH');
470: $Str.= '<tr><td colspan="2">'.
471: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
472: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
473: &mt('Select').'</a>'.(' 'x2).
474: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
475: &mt('Unselect').'</a>'.(' 'x2).
476: '</td></tr>'.$/;
477: $Str.= $seq->{'html'};
478: }
479: $Str .= '</table>'.$/;
480: return $Str;
481: }
482:
483: sub new_accumulator {
484: my ($title,$src,$symb,$seq_id,$inputname) = @_;
485: my $target;
486: my $item_id=0;
487: return
488: sub {
489: if (@_) {
490: my ($res,$checked,$anonpart,$namedpart) = @_;
491: $target.='<tr><td><label>'.
492: '<input type="checkbox" name="'.$inputname.'" ';
493: if ($checked) {
494: $target .= 'checked="checked" ';
495: }
496: my $anon_id = $item_id;
497: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
498: my $esc_symb = &escape($res->symb);
499: $target.=
500: 'value="'.$esc_symb.'" />'.
501: ' '.$res->compTitle.'</label>'.
502: (' 'x2).'<a target="preview" '.
503: 'href="'.$res->link.'?symb='.
504: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
505: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
506: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
507: if ($anonpart) {
508: if ($namedpart) {
509: my $checknamed = '';
510: my $checkedanon = ' checked="checked"';
511: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
512: $checknamed = $checkedanon;
513: $checkedanon = '';
514: }
515: $mixed = ' ('.
516: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
517: '<span class="LC_nobreak"><label>'.
518: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
519: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
520: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
521: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
522: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
523: '</label></span>').')';
524: } else {
525: $target .= ' '.&mt('(Anonymous Survey)');
526: }
527: }
528: $target.= $mixed.'</td></tr>'.$/;
529: } else {
530: if (defined($target)) {
531: return { title => $title,
532: symb => $symb,
533: src => $src,
534: id => $seq_id,
535: html => $target, };
536: }
537: return undef;
538: }
539: };
540: }
541:
542: sub get_selected_symbs {
543: my ($inputfield) = @_;
544: my $field = 'form.'.$inputfield;
545: my @symbs = (map {
546: &unescape($_);
547: } &Apache::loncommon::get_env_multiple($field));
548: return @symbs;
549: }
550:
551: ####################################################
552: ####################################################
553:
554: =pod
555:
556: =item &make_target_id($target)
557:
558: Inputs: Hash ref with the following entries:
559: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
560: $target->{'resptype'}.
561:
562: Returns: A string, suitable for a form parameter, which uniquely identifies
563: the problem, part, and response to do statistical analysis on.
564:
565: Used by Apache::lonstathelpers::ProblemSelector().
566:
567: =cut
568:
569: ####################################################
570: ####################################################
571: sub make_target_id {
572: my ($target) = @_;
573: my $id = &escape($target->{'symb'}).':'.
574: &escape($target->{'part'}).':'.
575: &escape($target->{'respid'}).':'.
576: &escape($target->{'resptype'});
577: return $id;
578: }
579:
580: ####################################################
581: ####################################################
582:
583: =pod
584:
585: =item &get_target_from_id($id)
586:
587: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
588:
589: Returns: A hash reference, $target, containing the following keys:
590: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
591: $target->{'resptype'}.
592:
593: =cut
594:
595: ####################################################
596: ####################################################
597: sub get_target_from_id {
598: my ($id) = @_;
599: if (! ref($id)) {
600: my ($symb,$part,$respid,$resptype) = split(':',$id);
601: return ({ symb => &unescape($symb),
602: part => &unescape($part),
603: respid => &unescape($respid),
604: resptype => &unescape($resptype)});
605: } elsif (ref($id) eq 'ARRAY') {
606: my @Return;
607: foreach my $selected (@$id) {
608: my ($symb,$part,$respid,$resptype) = split(':',$selected);
609: push(@Return,{ symb => &unescape($symb),
610: part => &unescape($part),
611: respid => &unescape($respid),
612: resptype => &unescape($resptype)});
613: }
614: return \@Return;
615: }
616: }
617:
618: ####################################################
619: ####################################################
620:
621: =pod
622:
623: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
624:
625: Determine the problem parts or responses preceeding and following the
626: current resource.
627:
628: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
629: $AcceptableResponseTypes, regular expression matching acceptable
630: response types,
631: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
632:
633: Returns: three hash references, $prev, $curr, $next, which refer to the
634: preceeding, current, or following problem parts or responses, depending
635: on the value of $granularity. Values of undef indicate there is no
636: previous or next part/response. A value of undef for all three indicates
637: there was no match found to the current part/resource.
638:
639: The hash references contain the following keys:
640: symb, part, resource
641:
642: If $granularity eq 'response', the following ADDITIONAL keys will be present:
643: respid, resptype
644:
645: =cut
646:
647: ####################################################
648: ####################################################
649: sub get_prev_curr_next {
650: my ($target,$AcceptableResponseTypes,$granularity) = @_;
651: #
652: # Build an array with the data we need to search through
653: my @Resource;
654: my ($navmap,@sequences) =
655: &Apache::lonstatistics::selected_sequences_with_assessments('all');
656: return $navmap if (! ref($navmap));
657: foreach my $seq (@sequences) {
658: my @resources = &get_resources($navmap,$seq);
659: foreach my $res (@resources) {
660: foreach my $part (@{$res->parts}) {
661: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
662: ($granularity eq 'part_survey')) {
663: push (@Resource,
664: { symb => $res->symb,
665: part => $part,
666: resource => $res,
667: } );
668: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
669: push (@Resource,
670: { symb => $res->symb,
671: part => $part,
672: resource => $res,
673: } );
674: } elsif ($granularity eq 'part') {
675: push (@Resource,
676: { symb => $res->symb,
677: part => $part,
678: resource => $res,
679: } );
680: } elsif ($granularity eq 'response') {
681: my @response_ids = $res->responseIds($part);
682: my @response_types = $res->responseType($part);
683: for (my $i=0;
684: $i<scalar(@response_ids);
685: $i++){
686: my $respid = $response_ids[$i];
687: my $resptype = $response_types[$i];
688: next if ($resptype !~ m/$AcceptableResponseTypes/);
689: push (@Resource,
690: { symb => $res->symb,
691: part => $part,
692: respid => $respid,
693: resptype => $resptype,
694: resource => $res,
695: } );
696: }
697: }
698: }
699: }
700: }
701: #
702: # Get the index of the current situation
703: my $curr_idx;
704: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
705: my $curr_item = $Resource[$curr_idx];
706: if ($granularity =~ /^(part|part_survey|part_task)$/) {
707: if ($curr_item->{'symb'} eq $target->{'symb'} &&
708: $curr_item->{'part'} eq $target->{'part'}) {
709: last;
710: }
711: } elsif ($granularity eq 'response') {
712: if ($curr_item->{'symb'} eq $target->{'symb'} &&
713: $curr_item->{'part'} eq $target->{'part'} &&
714: $curr_item->{'respid'} eq $target->{'respid'} &&
715: $curr_item->{'resptype'} eq $target->{'resptype'}) {
716: last;
717: }
718: }
719: }
720: my $curr_item = $Resource[$curr_idx];
721: if ($granularity =~ /^(part|part_survey|part_task)$/) {
722: if ($curr_item->{'symb'} ne $target->{'symb'} ||
723: $curr_item->{'part'} ne $target->{'part'}) {
724: # bogus symb - return nothing
725: return (undef,undef,undef);
726: }
727: } elsif ($granularity eq 'response') {
728: if ($curr_item->{'symb'} ne $target->{'symb'} ||
729: $curr_item->{'part'} ne $target->{'part'} ||
730: $curr_item->{'respid'} ne $target->{'respid'} ||
731: $curr_item->{'resptype'} ne $target->{'resptype'}){
732: # bogus symb - return nothing
733: return (undef,undef,undef);
734: }
735: }
736: #
737: # Now just pick up the data we need
738: my ($prev,$curr,$next);
739: if ($curr_idx == 0) {
740: $prev = undef;
741: $curr = $Resource[$curr_idx ];
742: $next = $Resource[$curr_idx+1];
743: } elsif ($curr_idx == $#Resource) {
744: $prev = $Resource[$curr_idx-1];
745: $curr = $Resource[$curr_idx ];
746: $next = undef;
747: } else {
748: $prev = $Resource[$curr_idx-1];
749: $curr = $Resource[$curr_idx ];
750: $next = $Resource[$curr_idx+1];
751: }
752: return ($navmap,$prev,$curr,$next);
753: }
754:
755:
756: #####################################################
757: #####################################################
758:
759: =pod
760:
761: =item GetStudentAnswers($r,$problem,$Students)
762:
763: Determines the correct answer for a set of students on a given problem.
764: The students answers are stored in the student hashes pointed to by the
765: array @$Students under the key 'answer'.
766:
767: Inputs: $r
768: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
769: $Students: reference to array containing student hashes (need 'username',
770: 'domain').
771:
772: Returns: nothing
773:
774: =cut
775:
776: #####################################################
777: #####################################################
778: sub GetStudentAnswers {
779: my ($r,$problem,$Students,$formname,$inputname) = @_;
780: my %answers;
781: my $status_type;
782: if (defined($formname)) {
783: $status_type = 'inline';
784: } else {
785: $status_type = 'popup';
786: }
787: my $c = $r->connection();
788: my %Answers;
789: my ($resource,$partid,$respid) = ($problem->{'resource'},
790: $problem->{'part'},
791: $problem->{'respid'});
792: # Read in the cache (if it exists) before we start timing things.
793: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
794: # Open progress window
795: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$Students));
796: $r->rflush();
797: foreach my $student (@$Students) {
798: last if ($c->aborted());
799: my $sname = $student->{'username'};
800: my $sdom = $student->{'domain'};
801: my $answer = &Apache::lonstathelpers::get_student_answer
802: ($resource,$sname,$sdom,$partid,$respid);
803: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
804: 'last student');
805: $answers{$answer}++;
806: $student->{'answer'} = $answer;
807: }
808: &Apache::lonstathelpers::write_analysis_cache();
809: return if ($c->aborted());
810: $r->rflush();
811: # close progress window
812: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
813: return \%answers;
814: }
815:
816: #####################################################
817: #####################################################
818:
819: =pod
820:
821: =item analyze_problem_as_student
822:
823: Analyzes a homework problem for a student
824:
825: Inputs: $resource: a resource object
826: $sname, $sdom, $partid, $respid
827:
828: Returns: the problem analysis hash
829:
830: =cut
831:
832: #####################################################
833: #####################################################
834: sub analyze_problem_as_student {
835: my ($resource,$sname,$sdom) = @_;
836: if (ref($resource) ne 'HASH') {
837: my $res = $resource;
838: $resource = { 'src' => $res->src,
839: 'symb' => $res->symb,
840: 'parts' => $res->parts };
841: foreach my $part (@{$resource->{'parts'}}) {
842: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
843: [$res->responseIds($part)];
844: }
845: }
846: my $url = $resource->{'src'};
847: my $symb = $resource->{'symb'};
848: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
849: if (! defined($analysis)) {
850: my $courseid = $env{'request.course.id'};
851: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
852: 'grade_domain' => $sdom,
853: 'grade_username' => $sname,
854: 'grade_symb' => $symb,
855: 'grade_courseid' => $courseid));
856: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
857: &store_analysis($sname,$sdom,$symb,$analysis);
858: }
859: my %Answer=&Apache::lonnet::str2hash($analysis);
860: #
861: return \%Answer;
862: }
863:
864: #####################################################
865: #####################################################
866:
867: =pod
868:
869: =item get_student_answer
870:
871: Analyzes a homework problem for a particular student and returns the correct
872: answer. Attempts to put together an answer for problem types
873: that do not natively support it.
874:
875: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
876: $sname, $sdom, $partid, $respid
877:
878: Returns: $answer
879:
880: If $partid and $respid are specified, $answer is simply a scalar containing
881: the correct answer for the response.
882:
883: If $partid or $respid are undefined, $answer will be a hash reference with
884: keys $partid.'.'.$respid.'.answer'.
885:
886: =cut
887:
888: #####################################################
889: #####################################################
890: sub get_student_answer {
891: my ($resource,$sname,$sdom,$partid,$respid) = @_;
892: #
893: if (ref($resource) ne 'HASH') {
894: my $res = $resource;
895: $resource = { 'src' => $res->src,
896: 'symb' => $res->symb,
897: 'parts' => $res->parts };
898: foreach my $part (@{$resource->{'parts'}}) {
899: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
900: [$res->responseIds($part)];
901: }
902: }
903: #
904: my $analysis =
905: &analyze_problem_as_student($resource,$sname,$sdom);
906: my $answer;
907: foreach my $partid (@{$resource->{'parts'}}) {
908: my $partdata = $resource->{'partdata'}->{$partid};
909: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
910: my $prefix = $partid.'.'.$respid;
911: my $key = $prefix.'.answer';
912: $answer->{$partid}->{$respid} =
913: &get_answer($prefix,$key,%$analysis);
914: }
915: }
916: my $returnvalue;
917: if (! defined($partid)) {
918: $returnvalue = $answer;
919: } elsif (! defined($respid)) {
920: $returnvalue = $answer->{$partid};
921: } else {
922: $returnvalue = $answer->{$partid}->{$respid};
923: }
924: return $returnvalue;
925: }
926:
927: sub get_answer {
928: my ($prefix,$key,%Answer) = @_;
929: my $returnvalue;
930: if (exists($Answer{$key})) {
931: if (ref($Answer{$key}) eq 'HASH') {
932: my $which = 'INTERNAL';
933: if (!exists($Answer{$key}{$which})) {
934: $which = (sort(keys(%{ $Answer{$key} })))[0];
935: }
936: my $student_answer = $Answer{$key}{$which}[0][0];
937: $returnvalue = $student_answer;
938: } else {
939: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
940: }
941: } else {
942: if (exists($Answer{$prefix.'.shown'})) {
943: # The response has foils
944: my %values;
945: while (my ($k,$v) = each(%Answer)) {
946: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
947: my $foilname = $2;
948: $values{$foilname}=$v;
949: }
950: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
951: if (ref($values{$foil}) eq 'ARRAY') {
952: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
953: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
954: } else {
955: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
956: &HTML::Entities::encode($values{$foil},'<>&"').'&';
957: }
958: }
959: $returnvalue =~ s/ /\%20/g;
960: chop ($returnvalue);
961: }
962: }
963: return $returnvalue;
964: }
965:
966: #####################################################
967: #####################################################
968:
969: =pod
970:
971: =item Caching routines
972:
973: =over 4
974:
975: =item &load_analysis_cache($symb)
976:
977: Loads the cache for the given symb into memory from disk.
978: Requires the cache filename be set.
979: Only should be called by &ensure_proper_cache.
980:
981: =cut
982:
983: #####################################################
984: #####################################################
985: {
986: my $cache_filename = undef;
987: my $current_symb = undef;
988: my %cache;
989:
990: sub load_analysis_cache {
991: my ($symb) = @_;
992: return if (! defined($cache_filename));
993: if (! defined($current_symb) || $current_symb ne $symb) {
994: undef(%cache);
995: my $storedstring;
996: my %cache_db;
997: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
998: $storedstring = $cache_db{&escape($symb)};
999: untie(%cache_db);
1000: }
1001: if (defined($storedstring)) {
1002: %cache = %{thaw($storedstring)};
1003: }
1004: }
1005: return;
1006: }
1007:
1008: #####################################################
1009: #####################################################
1010:
1011: =pod
1012:
1013: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
1014:
1015: Returns the appropriate data from the cache, or undef if no data exists.
1016:
1017: =cut
1018:
1019: #####################################################
1020: #####################################################
1021: sub get_from_analysis_cache {
1022: my ($sname,$sdom,$symb) = @_;
1023: &ensure_proper_cache($symb);
1024: my $returnvalue;
1025: if (exists($cache{$sname.':'.$sdom})) {
1026: $returnvalue = $cache{$sname.':'.$sdom};
1027: } else {
1028: $returnvalue = undef;
1029: }
1030: return $returnvalue;
1031: }
1032:
1033: #####################################################
1034: #####################################################
1035:
1036: =pod
1037:
1038: =item &write_analysis_cache($symb)
1039:
1040: Writes the in memory cache to disk so that it can be read in with
1041: &load_analysis_cache($symb).
1042:
1043: =cut
1044:
1045: #####################################################
1046: #####################################################
1047: sub write_analysis_cache {
1048: return if (! defined($current_symb) || ! defined($cache_filename));
1049: my %cache_db;
1050: my $key = &escape($current_symb);
1051: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
1052: my $storestring = freeze(\%cache);
1053: $cache_db{$key}=$storestring;
1054: $cache_db{$key.'.time'}=time;
1055: untie(%cache_db);
1056: }
1057: undef(%cache);
1058: undef($current_symb);
1059: undef($cache_filename);
1060: return;
1061: }
1062:
1063: #####################################################
1064: #####################################################
1065:
1066: =pod
1067:
1068: =item &ensure_proper_cache($symb)
1069:
1070: Called to make sure we have the proper cache set up. This is called
1071: prior to every analysis lookup.
1072:
1073: =cut
1074:
1075: #####################################################
1076: #####################################################
1077: sub ensure_proper_cache {
1078: my ($symb) = @_;
1079: my $cid = $env{'request.course.id'};
1080: my $new_filename = LONCAPA::tempdir() .
1081: 'problemanalysis_'.$cid.'_analysis_cache.db';
1082: if (! defined($cache_filename) ||
1083: $cache_filename ne $new_filename ||
1084: ! defined($current_symb) ||
1085: $current_symb ne $symb) {
1086: $cache_filename = $new_filename;
1087: # Notice: $current_symb is not set to $symb until after the cache is
1088: # loaded. This is what tells &load_analysis_cache to load in a new
1089: # symb cache.
1090: &load_analysis_cache($symb);
1091: $current_symb = $symb;
1092: }
1093: }
1094:
1095: #####################################################
1096: #####################################################
1097:
1098: =pod
1099:
1100: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1101:
1102: Stores the analysis data in the in memory cache.
1103:
1104: =cut
1105:
1106: #####################################################
1107: #####################################################
1108: sub store_analysis {
1109: my ($sname,$sdom,$symb,$dataset) = @_;
1110: return if ($symb ne $current_symb);
1111: $cache{$sname.':'.$sdom}=$dataset;
1112: return;
1113: }
1114:
1115: }
1116: #####################################################
1117: #####################################################
1118:
1119: =pod
1120:
1121: =back
1122:
1123: =cut
1124:
1125: #####################################################
1126: #####################################################
1127:
1128: ##
1129: ## The following is copied from datecalc1.pl, part of the
1130: ## Spreadsheet::WriteExcel CPAN module.
1131: ##
1132: ##
1133: ######################################################################
1134: #
1135: # Demonstration of writing date/time cells to Excel spreadsheets,
1136: # using UNIX/Perl time as source of date/time.
1137: #
1138: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1139: #
1140: ######################################################################
1141: #
1142: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1143: # measured in seconds.
1144: #
1145: # An Excel file can use exactly one of two different date/time systems.
1146: # In these systems, a floating point number represents the number of days
1147: # (and fractional parts of the day) since a start point. The floating point
1148: # number is referred to as a 'serial'.
1149: # The two systems ('1900' and '1904') use different starting points:
1150: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1151: # a leap year - see:
1152: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1153: # for the excuse^H^H^H^H^H^Hreason.
1154: # '1904'; '1.00' is 2 Jan 1904.
1155: #
1156: # The '1904' system is the default for Apple Macs. Windows versions of
1157: # Excel have the option to use the '1904' system.
1158: #
1159: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1160: # regard 1900 as a leap year, and thus its serials do not agree with
1161: # the 1900 serials of Excel for dates before 1 Mar 1900.
1162: #
1163: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1164: # regard 1900 as a leap year, and thus its serials do not agree with
1165: # the 1900 serials of Excel for dates before 1 Mar 1900.
1166: #
1167: ######################################################################
1168: #
1169: # Calculation description
1170: # =======================
1171: #
1172: # 1900 system
1173: # -----------
1174: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1175: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1176: # were leap years with an extra day.
1177: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1178: # 1 Jan 1970.
1179: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1180: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1181: #
1182: # 1904 system
1183: # -----------
1184: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1185: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1186: # were leap years with an extra day.
1187: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1188: # 1 Jan 1970.
1189: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1190: #
1191: ######################################################################
1192: #
1193: # Copyright (c) 2000, Andrew Benham.
1194: # This program is free software. It may be used, redistributed and/or
1195: # modified under the same terms as Perl itself.
1196: #
1197: # Andrew Benham, adsb@bigfoot.com
1198: # London, United Kingdom
1199: # 11 Nov 2000
1200: #
1201: ######################################################################
1202: #-----------------------------------------------------------
1203: # calc_serial()
1204: #
1205: # Called with (up to) 2 parameters.
1206: # 1. Unix timestamp. If omitted, uses current time.
1207: # 2. GMT flag. Set to '1' to return serial in GMT.
1208: # If omitted, returns serial in appropriate timezone.
1209: #
1210: # Returns date/time serial according to $DATE_SYSTEM selected
1211: #-----------------------------------------------------------
1212: sub calc_serial {
1213: # Use 1900 date system on all platforms other than Apple Mac (for which
1214: # use 1904 date system).
1215: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1216: my $time = (defined $_[0]) ? $_[0] : time();
1217: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1218: #
1219: # Divide timestamp by number of seconds in a day.
1220: # This gives a date serial with '0' on 1 Jan 1970.
1221: my $serial = $time / 86400;
1222: #
1223: # Adjust the date serial by the offset appropriate to the
1224: # currently selected system (1900/1904).
1225: if ($DATE_SYSTEM == 0) { # use 1900 system
1226: $serial += 25569;
1227: } else { # use 1904 system
1228: $serial += 24107;
1229: }
1230: #
1231: unless ($gmtflag) {
1232: # Now have a 'raw' serial with the right offset. But this
1233: # gives a serial in GMT, which is false unless the timezone
1234: # is GMT. We need to adjust the serial by the appropriate
1235: # timezone offset.
1236: # Calculate the appropriate timezone offset by seeing what
1237: # the differences between localtime and gmtime for the given
1238: # time are.
1239: #
1240: my @gmtime = gmtime($time);
1241: my @ltime = localtime($time);
1242: #
1243: # For the first 7 elements of the two arrays, adjust the
1244: # date serial where the elements differ.
1245: for (0 .. 6) {
1246: my $diff = $ltime[$_] - $gmtime[$_];
1247: if ($diff) {
1248: $serial += _adjustment($diff,$_);
1249: }
1250: }
1251: }
1252: #
1253: # Perpetuate the error that 1900 was a leap year by decrementing
1254: # the serial if we're using the 1900 system and the date is prior to
1255: # 1 Mar 1900. This has the effect of making serial value '60'
1256: # 29 Feb 1900.
1257: #
1258: # This fix only has any effect if UNIX/Perl time on the platform
1259: # can represent 1900. Many can't.
1260: #
1261: unless ($DATE_SYSTEM) {
1262: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1263: }
1264: return $serial;
1265: }
1266:
1267: sub _adjustment {
1268: # Based on the difference in the localtime/gmtime array elements
1269: # number, return the adjustment required to the serial.
1270: #
1271: # We only look at some elements of the localtime/gmtime arrays:
1272: # seconds unlikely to be different as all known timezones
1273: # have an offset of integral multiples of 15 minutes,
1274: # but it's easy to do.
1275: # minutes will be different for timezone offsets which are
1276: # not an exact number of hours.
1277: # hours very likely to be different.
1278: # weekday will differ when localtime/gmtime difference
1279: # straddles midnight.
1280: #
1281: # Assume that difference between localtime and gmtime is less than
1282: # 5 days, then don't have to do maths for day of month, month number,
1283: # year number, etc...
1284: #
1285: my ($delta,$element) = @_;
1286: my $adjust = 0;
1287: #
1288: if ($element == 0) { # Seconds
1289: $adjust = $delta/86400; # 60 * 60 * 24
1290: } elsif ($element == 1) { # Minutes
1291: $adjust = $delta/1440; # 60 * 24
1292: } elsif ($element == 2) { # Hours
1293: $adjust = $delta/24; # 24
1294: } elsif ($element == 6) { # Day of week number
1295: # Catch difference straddling Sat/Sun in either direction
1296: $delta += 7 if ($delta < -4);
1297: $delta -= 7 if ($delta > 4);
1298: #
1299: $adjust = $delta;
1300: }
1301: return $adjust;
1302: }
1303:
1304: ###########################################################
1305: ###########################################################
1306:
1307: =pod
1308:
1309: =item get_problem_data
1310:
1311: Returns a data structure describing the problem.
1312:
1313: Inputs: $url
1314:
1315: Returns: %Partdata
1316:
1317: =cut
1318:
1319: ## note: we must force each foil and option to not begin or end with
1320: ## spaces as they are stored without such data.
1321: ##
1322: ###########################################################
1323: ###########################################################
1324: sub get_problem_data {
1325: my ($url) = @_;
1326: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1327: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1328: my %Answer;
1329: %Answer=&Apache::lonnet::str2hash($Answ);
1330: my %Partdata;
1331: foreach my $part (@{$Answer{'parts'}}) {
1332: while (my($key,$value) = each(%Answer)) {
1333: #
1334: # Logging code:
1335: if (0) {
1336: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1337: if (ref($value) eq 'ARRAY') {
1338: &Apache::lonnet::logthis(' @'.join(',',@$value));
1339: } else {
1340: &Apache::lonnet::logthis(' '.$value);
1341: }
1342: }
1343: # End of logging code
1344: next if ($key !~ /^\Q$part\E/);
1345: $key =~ s/^\Q$part\E\.//;
1346: if (ref($value) eq 'ARRAY') {
1347: if ($key eq 'options') {
1348: $Partdata{$part}->{'_Options'}=$value;
1349: } elsif ($key eq 'concepts') {
1350: $Partdata{$part}->{'_Concepts'}=$value;
1351: } elsif ($key eq 'items') {
1352: $Partdata{$part}->{'_Items'}=$value;
1353: } elsif ($key =~ /^concept\.(.*)$/) {
1354: my $concept = $1;
1355: foreach my $foil (@$value) {
1356: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1357: $concept;
1358: }
1359: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1360: $Partdata{$part}->{$key}=$value;
1361: }
1362: } else {
1363: if ($key=~ /^foil\.text\.(.*)$/) {
1364: my $foil = $1;
1365: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1366: $value =~ s/(\s*$|^\s*)//g;
1367: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1368: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1369: my $foil = $1;
1370: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1371: } elsif ($key eq 'answercomputed') {
1372: $Partdata{$part}->{'answercomputed'} = $value;
1373: }
1374: }
1375: }
1376: }
1377: # Further debugging code
1378: if (0) {
1379: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1380: &log_hash_ref(\%Partdata);
1381: }
1382: return %Partdata;
1383: }
1384:
1385: sub log_array_ref {
1386: my ($arrayref,$prefix) = @_;
1387: return if (ref($arrayref) ne 'ARRAY');
1388: if (! defined($prefix)) { $prefix = ''; };
1389: foreach my $v (@$arrayref) {
1390: if (ref($v) eq 'ARRAY') {
1391: &log_array_ref($v,$prefix.' ');
1392: } elsif (ref($v) eq 'HASH') {
1393: &log_hash_ref($v,$prefix.' ');
1394: } else {
1395: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1396: }
1397: }
1398: }
1399:
1400: sub log_hash_ref {
1401: my ($hashref,$prefix) = @_;
1402: return if (ref($hashref) ne 'HASH');
1403: if (! defined($prefix)) { $prefix = ''; };
1404: while (my ($k,$v) = each(%$hashref)) {
1405: if (ref($v) eq 'ARRAY') {
1406: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1407: &log_array_ref($v,$prefix.' ');
1408: } elsif (ref($v) eq 'HASH') {
1409: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1410: &log_hash_ref($v,$prefix.' ');
1411: } else {
1412: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1413: }
1414: }
1415: }
1416: ####################################################
1417: ####################################################
1418:
1419: =pod
1420:
1421: =item &limit_by_time()
1422:
1423: =cut
1424:
1425: ####################################################
1426: ####################################################
1427: sub limit_by_time_form {
1428: my $Starttime_form = '';
1429: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1430: ('limitby_startdate');
1431: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1432: ('limitby_enddate');
1433: if (! defined($endtime)) {
1434: $endtime = time;
1435: }
1436: if (! defined($starttime)) {
1437: $starttime = $endtime - 60*60*24*7;
1438: }
1439: my $state;
1440: if (&limit_by_time()) {
1441: $state = '';
1442: } else {
1443: $state = 'disabled';
1444: }
1445: my $startdateform = &Apache::lonhtmlcommon::date_setter
1446: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1447: my $enddateform = &Apache::lonhtmlcommon::date_setter
1448: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1449: my $Str;
1450: $Str .= '<script type="text/javascript" language="JavaScript">';
1451: $Str .= 'function toggle_limitby_activity(state) {';
1452: $Str .= ' if (state) {';
1453: $Str .= ' limitby_startdate_enable();';
1454: $Str .= ' limitby_enddate_enable();';
1455: $Str .= ' } else {';
1456: $Str .= ' limitby_startdate_disable();';
1457: $Str .= ' limitby_enddate_disable();';
1458: $Str .= ' }';
1459: $Str .= '}';
1460: $Str .= '</script>';
1461: $Str .= '<fieldset>';
1462: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1463: if (&limit_by_time()) {
1464: $timecheckbox .= 'checked="checked" ';
1465: }
1466: $timecheckbox .= 'onchange="javascript:toggle_limitby_activity(this.checked);" ';
1467: $timecheckbox .= ' />';
1468: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1469: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1470: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1471: $Str .= '</fieldset>';
1472: return $Str;
1473: }
1474:
1475: sub limit_by_time {
1476: if (exists($env{'form.limit_by_time'}) &&
1477: $env{'form.limit_by_time'} ne '' ) {
1478: return 1;
1479: } else {
1480: return 0;
1481: }
1482: }
1483:
1484: sub get_time_limits {
1485: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1486: ('limitby_startdate');
1487: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1488: ('limitby_enddate');
1489: return ($starttime,$endtime);
1490: }
1491:
1492: ####################################################
1493: ####################################################
1494:
1495: =pod
1496:
1497: =item &manage_caches
1498:
1499: Inputs: $r, apache request object
1500:
1501: Returns: An array of scalars containing html for buttons.
1502:
1503: =cut
1504:
1505: ####################################################
1506: ####################################################
1507: sub manage_caches {
1508: my ($r,$formname,$inputname,$update_message) = @_;
1509: &Apache::loncoursedata::clear_internal_caches();
1510: my $sectionkey =
1511: join(',',
1512: map {
1513: &escape($_);
1514: } sort(&Apache::lonstatistics::get_selected_sections())
1515: );
1516: my $statuskey = $Apache::lonstatistics::enrollment_status;
1517: if (exists($env{'form.ClearCache'}) ||
1518: exists($env{'form.updatecaches'}) ||
1519: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1520: (exists($env{'form.prevsection'}) &&
1521: $env{'form.prevsection'} ne $sectionkey) ||
1522: (exists($env{'form.prevenrollstatus'}) &&
1523: $env{'form.prevenrollstatus'} ne $statuskey)
1524: ) {
1525: if (defined($update_message)) {
1526: $r->print($update_message);
1527: }
1528: if (0) {
1529: &Apache::lonnet::logthis('Updating mysql student data caches');
1530: }
1531: &gather_full_student_data($r,$formname,$inputname);
1532: }
1533: #
1534: my @Buttons =
1535: ('<input type="submit" name="ClearCache" '.
1536: 'value="'.&mt('Clear Caches').'" />',
1537: '<input type="submit" name="updatecaches" '.
1538: 'value="'.&mt('Update Caches').'" />'.
1539: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1540: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1541: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1542: );
1543: #
1544: if (! exists($env{'form.firstrun'})) {
1545: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1546: } else {
1547: $r->print('<input type="hidden" name="firstrun" value="no" />');
1548: }
1549: #
1550: return @Buttons;
1551: }
1552:
1553: sub gather_full_student_data {
1554: my ($r,$formname,$inputname) = @_;
1555: my $status_type;
1556: if (defined($formname)) {
1557: $status_type = 'inline';
1558: } else {
1559: $status_type = 'popup';
1560: }
1561: my $c = $r->connection();
1562: #
1563: &Apache::loncoursedata::clear_internal_caches();
1564: #
1565: my @Students = @Apache::lonstatistics::Students;
1566: #
1567: # Open the progress window
1568: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@Students));
1569: #
1570: while (my $student = shift @Students) {
1571: return if ($c->aborted());
1572: my $status = &Apache::loncoursedata::ensure_current_full_data
1573: ($student->{'username'},$student->{'domain'},
1574: $env{'request.course.id'});
1575: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1576: &mt('last student'));
1577: }
1578: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1579: $r->rflush();
1580: return;
1581: }
1582:
1583: ####################################################
1584: ####################################################
1585:
1586: =pod
1587:
1588: =item &submission_report_form
1589:
1590: Input: The originating reportSelected value for the current stats page.
1591:
1592: Output: Scalar containing HTML with needed form elements and a link to
1593: the student submission reports page.
1594:
1595: =cut
1596:
1597: ####################################################
1598: ####################################################
1599: sub submission_report_form {
1600: my ($original_report) = @_;
1601: # Note: In the link below we change the reportSelected value. If
1602: # the user hits the 'back' button on the browser after getting their
1603: # student submissions report, this value may still be around. So we
1604: # output a script block to set it properly. If the $original_report
1605: # value is unset, you are just asking for trouble.
1606: if (! defined($original_report)) {
1607: &Apache::lonnet::logthis
1608: ('someone called lonstathelpers::submission_report_form without '.
1609: ' enough input.');
1610: }
1611: my $html = $/.
1612: '<script type="text/javascript" language="JavaScript">'.
1613: "document.Statistics.reportSelected.value='$original_report';".
1614: '</script>'.
1615: '<input type="hidden" name="correctans" value="true" />'.
1616: '<input type="hidden" name="prob_status" value="true" />'.
1617: '<input type="hidden" name="all_sub" value="true" />';
1618: my $output_selector = $/.'<select name="output">'.$/;
1619: foreach ('HTML','Excel','CSV') {
1620: $output_selector .= ' <option value="'.lc($_).'"';
1621: if ($env{'form.output'} eq lc($_)) {
1622: $output_selector .= ' selected ';
1623: }
1624: $output_selector .='>'.&mt($_).'</option>'.$/;
1625: }
1626: $output_selector .= '</select>'.$/;
1627: my $link = '<a href="javascript:'.
1628: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1629: 'document.Statistics.submit();">';
1630: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1631: $link,'</a>').$/;
1632: return $html
1633: }
1634:
1635: ####################################################
1636: ####################################################
1637:
1638: =pod
1639:
1640: =back
1641:
1642: =cut
1643:
1644: ####################################################
1645: ####################################################
1646:
1647: 1;
1648:
1649: __END__
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