1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.78 2020/09/07 02:25:32 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: $base="http://".$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: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
93: return '<div class="LC_Box">'.
94: '<h4 class="LC_hcell">'.&mt('Problem').'</h4>'.
95: '<base href="'.$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,$sequence,$include_tools) = @_;
112: my @resources;
113: if ($include_tools) {
114: @resources = $navmap->retrieveResources($sequence,
115: sub { shift->is_gradable(); },
116: 0,0,0);
117: } else {
118: @resources = $navmap->retrieveResources($sequence,
119: sub { shift->is_problem(); },
120: 0,0,0);
121: }
122: return @resources;
123: }
124:
125: ####################################################
126: ####################################################
127:
128: =pod
129:
130: =item &problem_selector($AcceptedResponseTypes)
131:
132: Input: scalar containing regular expression which matches response
133: types to show. '.' will yield all, '(option|radiobutton)' will match
134: all option response and radiobutton problems.
135:
136: Returns: A string containing html for a table which lists the sequences
137: and their contents. A radiobutton is provided for each problem.
138: Skips 'survey' problems.
139:
140: =cut
141:
142: ####################################################
143: ####################################################
144: sub problem_selector {
145: my ($AcceptedResponseTypes,$sequence_addendum,$symbmode,$all,$prefix,
146: $byres,$include_tools,$smallbox,$onclick) = @_;
147: # all: also make sequences selectable
148: # prefix: prefix for all form names
149: # byres: radiobutton shown per resource
150: # include_tools: external tools included
151: # smallbox: use smaller box
152: # onclick: javascript to execute when clicked
153: my $Str;
154: my $jsadd='';
155: if ($onclick) {
156: $jsadd="onclick='$onclick'";
157: }
158: $Str = &Apache::loncommon::start_scrollbox(($smallbox?'420px':'620px'),
159: ($smallbox?'400px':'600px'),
160: ($smallbox?'60px':'300px')).
161: &Apache::loncommon::start_data_table();
162: my $rb_count =0;
163: my ($navmap,@sequences) =
164: &Apache::lonstatistics::selected_sequences_with_assessments('all');
165: return $navmap if (! ref($navmap)); # error
166: foreach my $seq (@sequences) {
167: my $seq_str = '';
168: foreach my $res (&get_resources($navmap,$seq,$include_tools)) {
169: if ($res->src() eq '/res/lib/templates/simpleproblem.problem') {
170: next if (grep(/^placeholder$/,@{$res->parts}));
171: }
172: my $title = $res->compTitle;
173: if (! defined($title) || $title eq '') {
174: ($title) = ($res->src =~ m:/([^/]*)$:);
175: }
176: my $totalresps = 0;
177: if ($byres) {
178: foreach my $part (@{$res->parts}) {
179: $totalresps += scalar($res->responseIds($part));
180: }
181: my $value = &HTML::Entities::encode($res->symb(),'<>&"');
182: my $checked;
183: if ($env{'form.problemchoice'} eq $res->symb()) {
184: $checked = ' checked="checked"';
185: }
186: my $rowspan;
187: if ($totalresps > 1) {
188: $rowspan = ' rowspan="'.$totalresps.'"';
189: }
190: $seq_str .= &Apache::loncommon::start_data_table_row().
191: '<td'.$rowspan.' style="vertical-align:top">'.
192: '<label><input type="radio" name="symb" value="'.$value.'"'.$checked.' />'.
193: $title.'</label>';
194: my $link = $res->link.'?symb='.&escape($res->shown_symb);
195: $seq_str .= (' 'x2).
196: '<a target="preview" href="'.$link.'">'.&mt('view').'</a></td>';
197: }
198: my %partsseen;
199: foreach my $part (@{$res->parts}) {
200: my (@response_ids,@response_types);
201: if ($res->is_tool) {
202: @response_ids = ();
203: @response_types = ('tool');
204: } else {
205: @response_ids = $res->responseIds($part);
206: @response_types = $res->responseType($part);
207: }
208: for (my $i=0;$i<scalar(@response_types);$i++){
209: my $respid = $response_ids[$i];
210: my $resptype = $response_types[$i];
211: if ($resptype =~ m/$AcceptedResponseTypes/) {
212: if ($byres) {
213: if (exists($partsseen{$part})) {
214: $seq_str .= &Apache::loncommon::continue_data_table_row();
215: } else {
216: my $parttitle = $part;
217: if ($part eq '0') {
218: $parttitle = '';
219: }
220: if ($parttitle ne '') {
221: $parttitle = (' 'x2).&mt('part').': '.$parttitle;
222: }
223: if (keys(%partsseen)) {
224: $seq_str .= &Apache::loncommon::continue_data_table_row();
225: }
226: unless ($partsseen{$part}) {
227: my $resprowspan;
228: if (scalar(@response_ids) > 1) {
229: $resprowspan = ' rowspan="'.scalar(@response_ids).'"';
230: }
231: $seq_str .= '<td'.$resprowspan.' style="vertical-align:top">'.
232: $parttitle.'</td>';
233: $partsseen{$part} = scalar(@response_ids);
234: }
235: }
236: $seq_str .= '<td>'.$resptype;
237: if (scalar(@response_ids) > 1) {
238: $seq_str .= ' '.&mt('id').': '.$respid;
239: }
240: $seq_str .= '</td>'. &Apache::loncommon::end_data_table_row()."\n";
241: } else {
242: my $value = &make_target_id({symb=>$res->symb,
243: part=>$part,
244: respid=>$respid,
245: resptype=>$resptype});
246: my $checked = '';
247: if ($env{'form.problemchoice'} eq $value) {
248: $checked = ' checked="checked"';
249: }
250: $seq_str .= &Apache::loncommon::start_data_table_row().
251: ($symbmode?
252: '<td><input type="radio" id="'.$prefix.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' '.
253: $jsadd.
254: ' /></td>'
255: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
256: '<td><label for="'.$prefix.$rb_count.'">'.$resptype.'</label></td>'.
257: '<td><label for="'.$prefix.$rb_count.'">'.$title.'</label>';
258: if (scalar(@response_ids) > 1) {
259: $seq_str .= &mt('response').' '.$respid;
260: }
261: my $link = $res->link.'?symb='.&escape($res->shown_symb);
262: $seq_str .= (' 'x2).
263: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
264: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
265: $rb_count++;
266: }
267: }
268: }
269: }
270: }
271: if ($seq_str ne '') {
272: if ($byres) {
273: $Str .= &Apache::loncommon::start_data_table_header_row().
274: '<th colspan="3">'.$seq->compTitle.'</th>'.
275: &Apache::loncommon::end_data_table_header_row().
276: $seq_str;
277: } else {
278: $Str .= &Apache::loncommon::start_data_table_header_row().
279: '<th colspan="3">'.
280: ($all?'<input type="radio" id="'.$prefix.'s'.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($seq->symb,'<>&').'" '.$jsadd.' />':'').
281: $seq->compTitle.'</th>'.
282: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
283: if (defined($sequence_addendum)) {
284: $Str .= &Apache::loncommon::start_data_table_header_row().
285: ('<td> </td>'x2).
286: '<td align="right">'.$sequence_addendum.'</td>'.
287: &Apache::loncommon::end_data_table_header_row()."\n";
288: }
289: }
290: }
291: }
292: $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
293: return $Str;
294: }
295:
296: ####################################################
297: ####################################################
298:
299: =pod
300:
301: =item &MultipleProblemSelector($navmap,$selected,$inputname)
302:
303: Generate HTML with checkboxes for problem selection.
304:
305: Input:
306:
307: $navmap: a navmap object. If undef, navmaps will be called to create a
308: new object.
309:
310: $selected: Scalar, Array, or hash reference of currently selected items.
311:
312: $inputname: The name of the form elements to use for the checkboxs.
313:
314: Returns: A string containing html for a table which lists the sequences
315: and their contents. A checkbox is provided for each problem.
316:
317: =cut
318:
319: ####################################################
320: ####################################################
321: sub MultipleProblemSelector {
322: my ($navmap,$inputname,$formname,$anoncounter)=@_;
323: my $cid = $env{'request.course.id'};
324: my $Str;
325: # Massage the input as needed.
326: if (! defined($navmap)) {
327: $navmap = Apache::lonnavmaps::navmap->new();
328: if (! defined($navmap)) {
329: $Str .= '<div class="LC_error">'
330: .&mt('Error: cannot process course structure')
331: .'</div>';
332: return $Str;
333: }
334: }
335: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
336: # Header
337: $Str .= <<"END";
338: <script type="text/javascript" language="JavaScript">
339: function checkall(value,seqid) {
340: for (i=0; i<document.forms.$formname.elements.length; i++) {
341: ele = document.forms.$formname.elements[i];
342: if (ele.name == '$inputname') {
343: if (seqid != null) {
344: itemid = document.forms.$formname.elements[i].id;
345: thing = itemid.split(':');
346: if (thing[0] == seqid) {
347: document.forms.$formname.elements[i].checked=value;
348: }
349: } else {
350: document.forms.$formname.elements[i].checked=value;
351: }
352: }
353: }
354: }
355: </script>
356: END
357: my $checkanonjs = <<"END";
358:
359: <script type="text/javascript" language="JavaScript">
360: function checkanon() {
361: return true;
362: }
363: </script>
364:
365: END
366: if (ref($anoncounter) eq 'HASH') {
367: if (keys(%{$anoncounter}) > 0) {
368: 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");
369: &js_escape(\$anonwarning);
370: $checkanonjs = <<"END";
371:
372: <script type="text/javascript" language="JavaScript">
373: function checkanon() {
374: anoncount = 0;
375: namedcount = 0;
376: for (i=0; i<document.forms.$formname.elements.length; i++) {
377: ele = document.forms.$formname.elements[i];
378: if (ele.name == '$inputname') {
379: itemid = document.forms.$formname.elements[i].id;
380: if (document.forms.$formname.elements[i].checked) {
381: anonid = 'anonymous_'+itemid;
382: mixid = 'mixed_'+itemid;
383: anonele = document.getElementById(anonid);
384: mixele = document.getElementById(mixid);
385: if (anonele.value > 0) {
386: if (mixele.value == 'none') {
387: anoncount ++;
388: } else {
389: if (mixele.value == '0') {
390: if (mixele.checked) {
391: anoncount ++;
392: } else {
393: namedcount ++;
394: }
395: } else {
396: namedcount ++;
397: }
398: }
399: } else {
400: namedcount ++;
401: }
402: }
403: }
404: }
405: if (anoncount > 0 && namedcount > 0) {
406: alert("$anonwarning");
407: return false;
408: }
409: }
410: </script>
411:
412: END
413: }
414: }
415: $Str .= $checkanonjs.
416: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
417: (' 'x4).
418: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
419: $Str .= $/.'<table>'.$/;
420: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
421: my $sequence_string;
422: my $seq_id = 0;
423: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
424: '',
425: '',
426: $seq_id++,
427: $inputname));
428: my @Sequence_Data;
429: while (my $curRes = $iterator->next()) {
430: if ($curRes == $iterator->END_MAP) {
431: if (ref($Accumulator[-1]) eq 'CODE') {
432: my $old_accumulator = pop(@Accumulator);
433: push(@Sequence_Data,&{$old_accumulator}());
434: }
435: } elsif ($curRes == $iterator->BEGIN_MAP) {
436: # Not much to do here.
437: }
438: next if (! ref($curRes));
439: if ($curRes->is_map) {
440: push(@Accumulator,&new_accumulator($curRes->compTitle,
441: $curRes->src,
442: $curRes->symb,
443: $seq_id++,
444: $inputname));
445: } elsif ($curRes->is_problem) {
446: my $anonpart = 0;
447: my $namedpart = 0;
448: my @parts = @{$curRes->parts()};
449: if (ref($anoncounter) eq 'HASH') {
450: if (keys(%{$anoncounter}) > 0) {
451: my @parts = @{$curRes->parts()};
452: my $symb = $curRes->symb();
453: foreach my $part (@parts) {
454: if ((exists($anoncounter->{$symb."\0".$part})) ||
455: $curRes->is_anonsurvey($part)) {
456: $anonpart ++;
457: } else {
458: $namedpart ++
459: }
460: }
461: }
462: }
463: if (@Accumulator && $Accumulator[-1] ne '') {
464: &{$Accumulator[-1]}($curRes,
465: exists($selected->{$curRes->symb}),
466: $anonpart,$namedpart);
467: }
468: }
469: }
470: my $course_seq = pop(@Sequence_Data);
471: foreach my $seq ($course_seq,@Sequence_Data) {
472: #my $seq = pop(@Sequence_Data);
473: next if (! defined($seq) || ref($seq) ne 'HASH');
474: $Str.= '<tr><td colspan="2">'.
475: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
476: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
477: &mt('Select').'</a>'.(' 'x2).
478: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
479: &mt('Unselect').'</a>'.(' 'x2).
480: '</td></tr>'.$/;
481: $Str.= $seq->{'html'};
482: }
483: $Str .= '</table>'.$/;
484: return $Str;
485: }
486:
487: sub new_accumulator {
488: my ($title,$src,$symb,$seq_id,$inputname) = @_;
489: my $target;
490: my $item_id=0;
491: return
492: sub {
493: if (@_) {
494: my ($res,$checked,$anonpart,$namedpart) = @_;
495: $target.='<tr><td><label>'.
496: '<input type="checkbox" name="'.$inputname.'" ';
497: if ($checked) {
498: $target .= 'checked="checked" ';
499: }
500: my $anon_id = $item_id;
501: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
502: my $esc_symb = &escape($res->symb);
503: $target.=
504: 'value="'.$esc_symb.'" />'.
505: ' '.$res->compTitle.'</label>'.
506: (' 'x2).'<a target="preview" '.
507: 'href="'.$res->link.'?symb='.
508: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
509: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
510: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
511: if ($anonpart) {
512: if ($namedpart) {
513: my $checknamed = '';
514: my $checkedanon = ' checked="checked"';
515: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
516: $checknamed = $checkedanon;
517: $checkedanon = '';
518: }
519: $mixed = ' ('.
520: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
521: '<span class="LC_nobreak"><label>'.
522: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
523: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
524: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
525: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
526: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
527: '</label></span>').')';
528: } else {
529: $target .= ' '.&mt('(Anonymous Survey)');
530: }
531: }
532: $target.= $mixed.'</td></tr>'.$/;
533: } else {
534: if (defined($target)) {
535: return { title => $title,
536: symb => $symb,
537: src => $src,
538: id => $seq_id,
539: html => $target, };
540: }
541: return undef;
542: }
543: };
544: }
545:
546: sub get_selected_symbs {
547: my ($inputfield) = @_;
548: my $field = 'form.'.$inputfield;
549: my @symbs = (map {
550: &unescape($_);
551: } &Apache::loncommon::get_env_multiple($field));
552: return @symbs;
553: }
554:
555: ####################################################
556: ####################################################
557:
558: =pod
559:
560: =item &make_target_id($target)
561:
562: Inputs: Hash ref with the following entries:
563: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
564: $target->{'resptype'}.
565:
566: Returns: A string, suitable for a form parameter, which uniquely identifies
567: the problem, part, and response to do statistical analysis on.
568:
569: Used by Apache::lonstathelpers::ProblemSelector().
570:
571: =cut
572:
573: ####################################################
574: ####################################################
575: sub make_target_id {
576: my ($target) = @_;
577: my $id = &escape($target->{'symb'}).':'.
578: &escape($target->{'part'}).':'.
579: &escape($target->{'respid'}).':'.
580: &escape($target->{'resptype'});
581: return $id;
582: }
583:
584: ####################################################
585: ####################################################
586:
587: =pod
588:
589: =item &get_target_from_id($id)
590:
591: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
592:
593: Returns: A hash reference, $target, containing the following keys:
594: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
595: $target->{'resptype'}.
596:
597: =cut
598:
599: ####################################################
600: ####################################################
601: sub get_target_from_id {
602: my ($id) = @_;
603: if (! ref($id)) {
604: my ($symb,$part,$respid,$resptype) = split(':',$id);
605: return ({ symb => &unescape($symb),
606: part => &unescape($part),
607: respid => &unescape($respid),
608: resptype => &unescape($resptype)});
609: } elsif (ref($id) eq 'ARRAY') {
610: my @Return;
611: foreach my $selected (@$id) {
612: my ($symb,$part,$respid,$resptype) = split(':',$selected);
613: push(@Return,{ symb => &unescape($symb),
614: part => &unescape($part),
615: respid => &unescape($respid),
616: resptype => &unescape($resptype)});
617: }
618: return \@Return;
619: }
620: }
621:
622: ####################################################
623: ####################################################
624:
625: =pod
626:
627: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
628:
629: Determine the problem parts or responses preceeding and following the
630: current resource.
631:
632: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
633: $AcceptableResponseTypes, regular expression matching acceptable
634: response types,
635: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
636:
637: Returns: three hash references, $prev, $curr, $next, which refer to the
638: preceeding, current, or following problem parts or responses, depending
639: on the value of $granularity. Values of undef indicate there is no
640: previous or next part/response. A value of undef for all three indicates
641: there was no match found to the current part/resource.
642:
643: The hash references contain the following keys:
644: symb, part, resource
645:
646: If $granularity eq 'response', the following ADDITIONAL keys will be present:
647: respid, resptype
648:
649: =cut
650:
651: ####################################################
652: ####################################################
653: sub get_prev_curr_next {
654: my ($target,$AcceptableResponseTypes,$granularity) = @_;
655: #
656: # Build an array with the data we need to search through
657: my @Resource;
658: my ($navmap,@sequences) =
659: &Apache::lonstatistics::selected_sequences_with_assessments('all');
660: return $navmap if (! ref($navmap));
661: foreach my $seq (@sequences) {
662: my @resources = &get_resources($navmap,$seq);
663: foreach my $res (@resources) {
664: foreach my $part (@{$res->parts}) {
665: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
666: ($granularity eq 'part_survey')) {
667: push (@Resource,
668: { symb => $res->symb,
669: part => $part,
670: resource => $res,
671: } );
672: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
673: push (@Resource,
674: { symb => $res->symb,
675: part => $part,
676: resource => $res,
677: } );
678: } elsif ($granularity eq 'part') {
679: push (@Resource,
680: { symb => $res->symb,
681: part => $part,
682: resource => $res,
683: } );
684: } elsif ($granularity eq 'response') {
685: my @response_ids = $res->responseIds($part);
686: my @response_types = $res->responseType($part);
687: for (my $i=0;
688: $i<scalar(@response_ids);
689: $i++){
690: my $respid = $response_ids[$i];
691: my $resptype = $response_types[$i];
692: next if ($resptype !~ m/$AcceptableResponseTypes/);
693: push (@Resource,
694: { symb => $res->symb,
695: part => $part,
696: respid => $respid,
697: resptype => $resptype,
698: resource => $res,
699: } );
700: }
701: }
702: }
703: }
704: }
705: #
706: # Get the index of the current situation
707: my $curr_idx;
708: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
709: my $curr_item = $Resource[$curr_idx];
710: if ($granularity =~ /^(part|part_survey|part_task)$/) {
711: if ($curr_item->{'symb'} eq $target->{'symb'} &&
712: $curr_item->{'part'} eq $target->{'part'}) {
713: last;
714: }
715: } elsif ($granularity eq 'response') {
716: if ($curr_item->{'symb'} eq $target->{'symb'} &&
717: $curr_item->{'part'} eq $target->{'part'} &&
718: $curr_item->{'respid'} eq $target->{'respid'} &&
719: $curr_item->{'resptype'} eq $target->{'resptype'}) {
720: last;
721: }
722: }
723: }
724: my $curr_item = $Resource[$curr_idx];
725: if ($granularity =~ /^(part|part_survey|part_task)$/) {
726: if ($curr_item->{'symb'} ne $target->{'symb'} ||
727: $curr_item->{'part'} ne $target->{'part'}) {
728: # bogus symb - return nothing
729: return (undef,undef,undef);
730: }
731: } elsif ($granularity eq 'response') {
732: if ($curr_item->{'symb'} ne $target->{'symb'} ||
733: $curr_item->{'part'} ne $target->{'part'} ||
734: $curr_item->{'respid'} ne $target->{'respid'} ||
735: $curr_item->{'resptype'} ne $target->{'resptype'}){
736: # bogus symb - return nothing
737: return (undef,undef,undef);
738: }
739: }
740: #
741: # Now just pick up the data we need
742: my ($prev,$curr,$next);
743: if ($curr_idx == 0) {
744: $prev = undef;
745: $curr = $Resource[$curr_idx ];
746: $next = $Resource[$curr_idx+1];
747: } elsif ($curr_idx == $#Resource) {
748: $prev = $Resource[$curr_idx-1];
749: $curr = $Resource[$curr_idx ];
750: $next = undef;
751: } else {
752: $prev = $Resource[$curr_idx-1];
753: $curr = $Resource[$curr_idx ];
754: $next = $Resource[$curr_idx+1];
755: }
756: return ($navmap,$prev,$curr,$next);
757: }
758:
759:
760: #####################################################
761: #####################################################
762:
763: =pod
764:
765: =item GetStudentAnswers($r,$problem,$Students)
766:
767: Determines the correct answer for a set of students on a given problem.
768: The students answers are stored in the student hashes pointed to by the
769: array @$Students under the key 'answer'.
770:
771: Inputs: $r
772: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
773: $Students: reference to array containing student hashes (need 'username',
774: 'domain').
775:
776: Returns: nothing
777:
778: =cut
779:
780: #####################################################
781: #####################################################
782: sub GetStudentAnswers {
783: my ($r,$problem,$Students,$formname,$inputname) = @_;
784: my %answers;
785: my $status_type;
786: if (defined($formname)) {
787: $status_type = 'inline';
788: } else {
789: $status_type = 'popup';
790: }
791: my $c = $r->connection();
792: my %Answers;
793: my ($resource,$partid,$respid) = ($problem->{'resource'},
794: $problem->{'part'},
795: $problem->{'respid'});
796: # Read in the cache (if it exists) before we start timing things.
797: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
798: # Open progress window
799: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$Students));
800: $r->rflush();
801: foreach my $student (@$Students) {
802: last if ($c->aborted());
803: my $sname = $student->{'username'};
804: my $sdom = $student->{'domain'};
805: my $answer = &Apache::lonstathelpers::get_student_answer
806: ($resource,$sname,$sdom,$partid,$respid);
807: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
808: 'last student');
809: $answers{$answer}++;
810: $student->{'answer'} = $answer;
811: }
812: &Apache::lonstathelpers::write_analysis_cache();
813: return if ($c->aborted());
814: $r->rflush();
815: # close progress window
816: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
817: return \%answers;
818: }
819:
820: #####################################################
821: #####################################################
822:
823: =pod
824:
825: =item analyze_problem_as_student
826:
827: Analyzes a homework problem for a student
828:
829: Inputs: $resource: a resource object
830: $sname, $sdom, $partid, $respid
831:
832: Returns: the problem analysis hash
833:
834: =cut
835:
836: #####################################################
837: #####################################################
838: sub analyze_problem_as_student {
839: my ($resource,$sname,$sdom) = @_;
840: if (ref($resource) ne 'HASH') {
841: my $res = $resource;
842: $resource = { 'src' => $res->src,
843: 'symb' => $res->symb,
844: 'parts' => $res->parts };
845: foreach my $part (@{$resource->{'parts'}}) {
846: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
847: [$res->responseIds($part)];
848: }
849: }
850: my $url = $resource->{'src'};
851: my $symb = $resource->{'symb'};
852: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
853: if (! defined($analysis)) {
854: my $courseid = $env{'request.course.id'};
855: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
856: 'grade_domain' => $sdom,
857: 'grade_username' => $sname,
858: 'grade_symb' => $symb,
859: 'grade_courseid' => $courseid));
860: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
861: &store_analysis($sname,$sdom,$symb,$analysis);
862: }
863: my %Answer=&Apache::lonnet::str2hash($analysis);
864: #
865: return \%Answer;
866: }
867:
868: #####################################################
869: #####################################################
870:
871: =pod
872:
873: =item get_student_answer
874:
875: Analyzes a homework problem for a particular student and returns the correct
876: answer. Attempts to put together an answer for problem types
877: that do not natively support it.
878:
879: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
880: $sname, $sdom, $partid, $respid
881:
882: Returns: $answer
883:
884: If $partid and $respid are specified, $answer is simply a scalar containing
885: the correct answer for the response.
886:
887: If $partid or $respid are undefined, $answer will be a hash reference with
888: keys $partid.'.'.$respid.'.answer'.
889:
890: =cut
891:
892: #####################################################
893: #####################################################
894: sub get_student_answer {
895: my ($resource,$sname,$sdom,$partid,$respid) = @_;
896: #
897: if (ref($resource) ne 'HASH') {
898: my $res = $resource;
899: $resource = { 'src' => $res->src,
900: 'symb' => $res->symb,
901: 'parts' => $res->parts };
902: foreach my $part (@{$resource->{'parts'}}) {
903: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
904: [$res->responseIds($part)];
905: }
906: }
907: #
908: my $analysis =
909: &analyze_problem_as_student($resource,$sname,$sdom);
910: my $answer;
911: foreach my $partid (@{$resource->{'parts'}}) {
912: my $partdata = $resource->{'partdata'}->{$partid};
913: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
914: my $prefix = $partid.'.'.$respid;
915: my $key = $prefix.'.answer';
916: $answer->{$partid}->{$respid} =
917: &get_answer($prefix,$key,%$analysis);
918: }
919: }
920: my $returnvalue;
921: if (! defined($partid)) {
922: $returnvalue = $answer;
923: } elsif (! defined($respid)) {
924: $returnvalue = $answer->{$partid};
925: } else {
926: $returnvalue = $answer->{$partid}->{$respid};
927: }
928: return $returnvalue;
929: }
930:
931: sub get_answer {
932: my ($prefix,$key,%Answer) = @_;
933: my $returnvalue;
934: if (exists($Answer{$key})) {
935: if (ref($Answer{$key}) eq 'HASH') {
936: my $which = 'INTERNAL';
937: if (!exists($Answer{$key}{$which})) {
938: $which = (sort(keys(%{ $Answer{$key} })))[0];
939: }
940: my $student_answer = $Answer{$key}{$which}[0][0];
941: $returnvalue = $student_answer;
942: } else {
943: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
944: }
945: } else {
946: if (exists($Answer{$prefix.'.shown'})) {
947: # The response has foils
948: my %values;
949: while (my ($k,$v) = each(%Answer)) {
950: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
951: my $foilname = $2;
952: $values{$foilname}=$v;
953: }
954: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
955: if (ref($values{$foil}) eq 'ARRAY') {
956: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
957: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
958: } else {
959: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
960: &HTML::Entities::encode($values{$foil},'<>&"').'&';
961: }
962: }
963: $returnvalue =~ s/ /\%20/g;
964: chop ($returnvalue);
965: }
966: }
967: return $returnvalue;
968: }
969:
970: #####################################################
971: #####################################################
972:
973: =pod
974:
975: =item Caching routines
976:
977: =over 4
978:
979: =item &load_analysis_cache($symb)
980:
981: Loads the cache for the given symb into memory from disk.
982: Requires the cache filename be set.
983: Only should be called by &ensure_proper_cache.
984:
985: =cut
986:
987: #####################################################
988: #####################################################
989: {
990: my $cache_filename = undef;
991: my $current_symb = undef;
992: my %cache;
993:
994: sub load_analysis_cache {
995: my ($symb) = @_;
996: return if (! defined($cache_filename));
997: if (! defined($current_symb) || $current_symb ne $symb) {
998: undef(%cache);
999: my $storedstring;
1000: my %cache_db;
1001: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
1002: $storedstring = $cache_db{&escape($symb)};
1003: untie(%cache_db);
1004: }
1005: if (defined($storedstring)) {
1006: %cache = %{thaw($storedstring)};
1007: }
1008: }
1009: return;
1010: }
1011:
1012: #####################################################
1013: #####################################################
1014:
1015: =pod
1016:
1017: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
1018:
1019: Returns the appropriate data from the cache, or undef if no data exists.
1020:
1021: =cut
1022:
1023: #####################################################
1024: #####################################################
1025: sub get_from_analysis_cache {
1026: my ($sname,$sdom,$symb) = @_;
1027: &ensure_proper_cache($symb);
1028: my $returnvalue;
1029: if (exists($cache{$sname.':'.$sdom})) {
1030: $returnvalue = $cache{$sname.':'.$sdom};
1031: } else {
1032: $returnvalue = undef;
1033: }
1034: return $returnvalue;
1035: }
1036:
1037: #####################################################
1038: #####################################################
1039:
1040: =pod
1041:
1042: =item &write_analysis_cache($symb)
1043:
1044: Writes the in memory cache to disk so that it can be read in with
1045: &load_analysis_cache($symb).
1046:
1047: =cut
1048:
1049: #####################################################
1050: #####################################################
1051: sub write_analysis_cache {
1052: return if (! defined($current_symb) || ! defined($cache_filename));
1053: my %cache_db;
1054: my $key = &escape($current_symb);
1055: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
1056: my $storestring = freeze(\%cache);
1057: $cache_db{$key}=$storestring;
1058: $cache_db{$key.'.time'}=time;
1059: untie(%cache_db);
1060: }
1061: undef(%cache);
1062: undef($current_symb);
1063: undef($cache_filename);
1064: return;
1065: }
1066:
1067: #####################################################
1068: #####################################################
1069:
1070: =pod
1071:
1072: =item &ensure_proper_cache($symb)
1073:
1074: Called to make sure we have the proper cache set up. This is called
1075: prior to every analysis lookup.
1076:
1077: =cut
1078:
1079: #####################################################
1080: #####################################################
1081: sub ensure_proper_cache {
1082: my ($symb) = @_;
1083: my $cid = $env{'request.course.id'};
1084: my $new_filename = LONCAPA::tempdir() .
1085: 'problemanalysis_'.$cid.'_analysis_cache.db';
1086: if (! defined($cache_filename) ||
1087: $cache_filename ne $new_filename ||
1088: ! defined($current_symb) ||
1089: $current_symb ne $symb) {
1090: $cache_filename = $new_filename;
1091: # Notice: $current_symb is not set to $symb until after the cache is
1092: # loaded. This is what tells &load_analysis_cache to load in a new
1093: # symb cache.
1094: &load_analysis_cache($symb);
1095: $current_symb = $symb;
1096: }
1097: }
1098:
1099: #####################################################
1100: #####################################################
1101:
1102: =pod
1103:
1104: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1105:
1106: Stores the analysis data in the in memory cache.
1107:
1108: =cut
1109:
1110: #####################################################
1111: #####################################################
1112: sub store_analysis {
1113: my ($sname,$sdom,$symb,$dataset) = @_;
1114: return if ($symb ne $current_symb);
1115: $cache{$sname.':'.$sdom}=$dataset;
1116: return;
1117: }
1118:
1119: }
1120: #####################################################
1121: #####################################################
1122:
1123: =pod
1124:
1125: =back
1126:
1127: =cut
1128:
1129: #####################################################
1130: #####################################################
1131:
1132: ##
1133: ## The following is copied from datecalc1.pl, part of the
1134: ## Spreadsheet::WriteExcel CPAN module.
1135: ##
1136: ##
1137: ######################################################################
1138: #
1139: # Demonstration of writing date/time cells to Excel spreadsheets,
1140: # using UNIX/Perl time as source of date/time.
1141: #
1142: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1143: #
1144: ######################################################################
1145: #
1146: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1147: # measured in seconds.
1148: #
1149: # An Excel file can use exactly one of two different date/time systems.
1150: # In these systems, a floating point number represents the number of days
1151: # (and fractional parts of the day) since a start point. The floating point
1152: # number is referred to as a 'serial'.
1153: # The two systems ('1900' and '1904') use different starting points:
1154: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1155: # a leap year - see:
1156: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1157: # for the excuse^H^H^H^H^H^Hreason.
1158: # '1904'; '1.00' is 2 Jan 1904.
1159: #
1160: # The '1904' system is the default for Apple Macs. Windows versions of
1161: # Excel have the option to use the '1904' system.
1162: #
1163: # Note that Visual Basic's "DateSerial" function 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: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1168: # regard 1900 as a leap year, and thus its serials do not agree with
1169: # the 1900 serials of Excel for dates before 1 Mar 1900.
1170: #
1171: ######################################################################
1172: #
1173: # Calculation description
1174: # =======================
1175: #
1176: # 1900 system
1177: # -----------
1178: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1179: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1180: # were leap years with an extra day.
1181: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1182: # 1 Jan 1970.
1183: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1184: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1185: #
1186: # 1904 system
1187: # -----------
1188: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1189: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1190: # were leap years with an extra day.
1191: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1192: # 1 Jan 1970.
1193: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1194: #
1195: ######################################################################
1196: #
1197: # Copyright (c) 2000, Andrew Benham.
1198: # This program is free software. It may be used, redistributed and/or
1199: # modified under the same terms as Perl itself.
1200: #
1201: # Andrew Benham, adsb@bigfoot.com
1202: # London, United Kingdom
1203: # 11 Nov 2000
1204: #
1205: ######################################################################
1206: #-----------------------------------------------------------
1207: # calc_serial()
1208: #
1209: # Called with (up to) 2 parameters.
1210: # 1. Unix timestamp. If omitted, uses current time.
1211: # 2. GMT flag. Set to '1' to return serial in GMT.
1212: # If omitted, returns serial in appropriate timezone.
1213: #
1214: # Returns date/time serial according to $DATE_SYSTEM selected
1215: #-----------------------------------------------------------
1216: sub calc_serial {
1217: # Use 1900 date system on all platforms other than Apple Mac (for which
1218: # use 1904 date system).
1219: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1220: my $time = (defined $_[0]) ? $_[0] : time();
1221: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1222: #
1223: # Divide timestamp by number of seconds in a day.
1224: # This gives a date serial with '0' on 1 Jan 1970.
1225: my $serial = $time / 86400;
1226: #
1227: # Adjust the date serial by the offset appropriate to the
1228: # currently selected system (1900/1904).
1229: if ($DATE_SYSTEM == 0) { # use 1900 system
1230: $serial += 25569;
1231: } else { # use 1904 system
1232: $serial += 24107;
1233: }
1234: #
1235: unless ($gmtflag) {
1236: # Now have a 'raw' serial with the right offset. But this
1237: # gives a serial in GMT, which is false unless the timezone
1238: # is GMT. We need to adjust the serial by the appropriate
1239: # timezone offset.
1240: # Calculate the appropriate timezone offset by seeing what
1241: # the differences between localtime and gmtime for the given
1242: # time are.
1243: #
1244: my @gmtime = gmtime($time);
1245: my @ltime = localtime($time);
1246: #
1247: # For the first 7 elements of the two arrays, adjust the
1248: # date serial where the elements differ.
1249: for (0 .. 6) {
1250: my $diff = $ltime[$_] - $gmtime[$_];
1251: if ($diff) {
1252: $serial += _adjustment($diff,$_);
1253: }
1254: }
1255: }
1256: #
1257: # Perpetuate the error that 1900 was a leap year by decrementing
1258: # the serial if we're using the 1900 system and the date is prior to
1259: # 1 Mar 1900. This has the effect of making serial value '60'
1260: # 29 Feb 1900.
1261: #
1262: # This fix only has any effect if UNIX/Perl time on the platform
1263: # can represent 1900. Many can't.
1264: #
1265: unless ($DATE_SYSTEM) {
1266: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1267: }
1268: return $serial;
1269: }
1270:
1271: sub _adjustment {
1272: # Based on the difference in the localtime/gmtime array elements
1273: # number, return the adjustment required to the serial.
1274: #
1275: # We only look at some elements of the localtime/gmtime arrays:
1276: # seconds unlikely to be different as all known timezones
1277: # have an offset of integral multiples of 15 minutes,
1278: # but it's easy to do.
1279: # minutes will be different for timezone offsets which are
1280: # not an exact number of hours.
1281: # hours very likely to be different.
1282: # weekday will differ when localtime/gmtime difference
1283: # straddles midnight.
1284: #
1285: # Assume that difference between localtime and gmtime is less than
1286: # 5 days, then don't have to do maths for day of month, month number,
1287: # year number, etc...
1288: #
1289: my ($delta,$element) = @_;
1290: my $adjust = 0;
1291: #
1292: if ($element == 0) { # Seconds
1293: $adjust = $delta/86400; # 60 * 60 * 24
1294: } elsif ($element == 1) { # Minutes
1295: $adjust = $delta/1440; # 60 * 24
1296: } elsif ($element == 2) { # Hours
1297: $adjust = $delta/24; # 24
1298: } elsif ($element == 6) { # Day of week number
1299: # Catch difference straddling Sat/Sun in either direction
1300: $delta += 7 if ($delta < -4);
1301: $delta -= 7 if ($delta > 4);
1302: #
1303: $adjust = $delta;
1304: }
1305: return $adjust;
1306: }
1307:
1308: ###########################################################
1309: ###########################################################
1310:
1311: =pod
1312:
1313: =item get_problem_data
1314:
1315: Returns a data structure describing the problem.
1316:
1317: Inputs: $url
1318:
1319: Returns: %Partdata
1320:
1321: =cut
1322:
1323: ## note: we must force each foil and option to not begin or end with
1324: ## spaces as they are stored without such data.
1325: ##
1326: ###########################################################
1327: ###########################################################
1328: sub get_problem_data {
1329: my ($url) = @_;
1330: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1331: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1332: my %Answer;
1333: %Answer=&Apache::lonnet::str2hash($Answ);
1334: my %Partdata;
1335: foreach my $part (@{$Answer{'parts'}}) {
1336: while (my($key,$value) = each(%Answer)) {
1337: #
1338: # Logging code:
1339: if (0) {
1340: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1341: if (ref($value) eq 'ARRAY') {
1342: &Apache::lonnet::logthis(' @'.join(',',@$value));
1343: } else {
1344: &Apache::lonnet::logthis(' '.$value);
1345: }
1346: }
1347: # End of logging code
1348: next if ($key !~ /^\Q$part\E/);
1349: $key =~ s/^\Q$part\E\.//;
1350: if (ref($value) eq 'ARRAY') {
1351: if ($key eq 'options') {
1352: $Partdata{$part}->{'_Options'}=$value;
1353: } elsif ($key eq 'concepts') {
1354: $Partdata{$part}->{'_Concepts'}=$value;
1355: } elsif ($key eq 'items') {
1356: $Partdata{$part}->{'_Items'}=$value;
1357: } elsif ($key =~ /^concept\.(.*)$/) {
1358: my $concept = $1;
1359: foreach my $foil (@$value) {
1360: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1361: $concept;
1362: }
1363: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1364: $Partdata{$part}->{$key}=$value;
1365: }
1366: } else {
1367: if ($key=~ /^foil\.text\.(.*)$/) {
1368: my $foil = $1;
1369: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1370: $value =~ s/(\s*$|^\s*)//g;
1371: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1372: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1373: my $foil = $1;
1374: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1375: } elsif ($key eq 'answercomputed') {
1376: $Partdata{$part}->{'answercomputed'} = $value;
1377: }
1378: }
1379: }
1380: }
1381: # Further debugging code
1382: if (0) {
1383: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1384: &log_hash_ref(\%Partdata);
1385: }
1386: return %Partdata;
1387: }
1388:
1389: sub log_array_ref {
1390: my ($arrayref,$prefix) = @_;
1391: return if (ref($arrayref) ne 'ARRAY');
1392: if (! defined($prefix)) { $prefix = ''; };
1393: foreach my $v (@$arrayref) {
1394: if (ref($v) eq 'ARRAY') {
1395: &log_array_ref($v,$prefix.' ');
1396: } elsif (ref($v) eq 'HASH') {
1397: &log_hash_ref($v,$prefix.' ');
1398: } else {
1399: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1400: }
1401: }
1402: }
1403:
1404: sub log_hash_ref {
1405: my ($hashref,$prefix) = @_;
1406: return if (ref($hashref) ne 'HASH');
1407: if (! defined($prefix)) { $prefix = ''; };
1408: while (my ($k,$v) = each(%$hashref)) {
1409: if (ref($v) eq 'ARRAY') {
1410: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1411: &log_array_ref($v,$prefix.' ');
1412: } elsif (ref($v) eq 'HASH') {
1413: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1414: &log_hash_ref($v,$prefix.' ');
1415: } else {
1416: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1417: }
1418: }
1419: }
1420: ####################################################
1421: ####################################################
1422:
1423: =pod
1424:
1425: =item &limit_by_time()
1426:
1427: =cut
1428:
1429: ####################################################
1430: ####################################################
1431: sub limit_by_time_form {
1432: my $Starttime_form = '';
1433: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1434: ('limitby_startdate');
1435: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1436: ('limitby_enddate');
1437: if (! defined($endtime)) {
1438: $endtime = time;
1439: }
1440: if (! defined($starttime)) {
1441: $starttime = $endtime - 60*60*24*7;
1442: }
1443: my $state;
1444: if (&limit_by_time()) {
1445: $state = '';
1446: } else {
1447: $state = 'disabled';
1448: }
1449: my $startdateform = &Apache::lonhtmlcommon::date_setter
1450: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1451: my $enddateform = &Apache::lonhtmlcommon::date_setter
1452: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1453: my $Str;
1454: $Str .= '<script type="text/javascript" language="JavaScript">';
1455: $Str .= 'function toggle_limitby_activity(state) {';
1456: $Str .= ' if (state) {';
1457: $Str .= ' limitby_startdate_enable();';
1458: $Str .= ' limitby_enddate_enable();';
1459: $Str .= ' } else {';
1460: $Str .= ' limitby_startdate_disable();';
1461: $Str .= ' limitby_enddate_disable();';
1462: $Str .= ' }';
1463: $Str .= '}';
1464: $Str .= '</script>';
1465: $Str .= '<fieldset>';
1466: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1467: if (&limit_by_time()) {
1468: $timecheckbox .= 'checked="checked" ';
1469: }
1470: $timecheckbox .= 'onchange="javascript:toggle_limitby_activity(this.checked);" ';
1471: $timecheckbox .= ' />';
1472: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1473: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1474: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1475: $Str .= '</fieldset>';
1476: return $Str;
1477: }
1478:
1479: sub limit_by_time {
1480: if (exists($env{'form.limit_by_time'}) &&
1481: $env{'form.limit_by_time'} ne '' ) {
1482: return 1;
1483: } else {
1484: return 0;
1485: }
1486: }
1487:
1488: sub get_time_limits {
1489: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1490: ('limitby_startdate');
1491: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1492: ('limitby_enddate');
1493: return ($starttime,$endtime);
1494: }
1495:
1496: ####################################################
1497: ####################################################
1498:
1499: =pod
1500:
1501: =item &manage_caches
1502:
1503: Inputs: $r, apache request object
1504:
1505: Returns: An array of scalars containing html for buttons.
1506:
1507: =cut
1508:
1509: ####################################################
1510: ####################################################
1511: sub manage_caches {
1512: my ($r,$formname,$inputname,$update_message) = @_;
1513: &Apache::loncoursedata::clear_internal_caches();
1514: my $sectionkey =
1515: join(',',
1516: map {
1517: &escape($_);
1518: } sort(&Apache::lonstatistics::get_selected_sections())
1519: );
1520: my $statuskey = $Apache::lonstatistics::enrollment_status;
1521: if (exists($env{'form.ClearCache'}) ||
1522: exists($env{'form.updatecaches'}) ||
1523: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1524: (exists($env{'form.prevsection'}) &&
1525: $env{'form.prevsection'} ne $sectionkey) ||
1526: (exists($env{'form.prevenrollstatus'}) &&
1527: $env{'form.prevenrollstatus'} ne $statuskey)
1528: ) {
1529: if (defined($update_message)) {
1530: $r->print($update_message);
1531: }
1532: if (0) {
1533: &Apache::lonnet::logthis('Updating mysql student data caches');
1534: }
1535: &gather_full_student_data($r,$formname,$inputname);
1536: }
1537: #
1538: my @Buttons =
1539: ('<input type="submit" name="ClearCache" '.
1540: 'value="'.&mt('Clear Caches').'" />',
1541: '<input type="submit" name="updatecaches" '.
1542: 'value="'.&mt('Update Caches').'" />'.
1543: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1544: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1545: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1546: );
1547: #
1548: if (! exists($env{'form.firstrun'})) {
1549: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1550: } else {
1551: $r->print('<input type="hidden" name="firstrun" value="no" />');
1552: }
1553: #
1554: return @Buttons;
1555: }
1556:
1557: sub gather_full_student_data {
1558: my ($r,$formname,$inputname) = @_;
1559: my $status_type;
1560: if (defined($formname)) {
1561: $status_type = 'inline';
1562: } else {
1563: $status_type = 'popup';
1564: }
1565: my $c = $r->connection();
1566: #
1567: &Apache::loncoursedata::clear_internal_caches();
1568: #
1569: my @Students = @Apache::lonstatistics::Students;
1570: #
1571: # Open the progress window
1572: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@Students));
1573: #
1574: while (my $student = shift @Students) {
1575: return if ($c->aborted());
1576: my $status = &Apache::loncoursedata::ensure_current_full_data
1577: ($student->{'username'},$student->{'domain'},
1578: $env{'request.course.id'});
1579: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1580: &mt('last student'));
1581: }
1582: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1583: $r->rflush();
1584: return;
1585: }
1586:
1587: ####################################################
1588: ####################################################
1589:
1590: =pod
1591:
1592: =item &submission_report_form
1593:
1594: Input: The originating reportSelected value for the current stats page.
1595:
1596: Output: Scalar containing HTML with needed form elements and a link to
1597: the student submission reports page.
1598:
1599: =cut
1600:
1601: ####################################################
1602: ####################################################
1603: sub submission_report_form {
1604: my ($original_report) = @_;
1605: # Note: In the link below we change the reportSelected value. If
1606: # the user hits the 'back' button on the browser after getting their
1607: # student submissions report, this value may still be around. So we
1608: # output a script block to set it properly. If the $original_report
1609: # value is unset, you are just asking for trouble.
1610: if (! defined($original_report)) {
1611: &Apache::lonnet::logthis
1612: ('someone called lonstathelpers::submission_report_form without '.
1613: ' enough input.');
1614: }
1615: my $html = $/.
1616: '<script type="text/javascript" language="JavaScript">'.
1617: "document.Statistics.reportSelected.value='$original_report';".
1618: '</script>'.
1619: '<input type="hidden" name="correctans" value="true" />'.
1620: '<input type="hidden" name="prob_status" value="true" />'.
1621: '<input type="hidden" name="all_sub" value="true" />';
1622: my $output_selector = $/.'<select name="output">'.$/;
1623: foreach ('HTML','Excel','CSV') {
1624: $output_selector .= ' <option value="'.lc($_).'"';
1625: if ($env{'form.output'} eq lc($_)) {
1626: $output_selector .= ' selected ';
1627: }
1628: $output_selector .='>'.&mt($_).'</option>'.$/;
1629: }
1630: $output_selector .= '</select>'.$/;
1631: my $link = '<a href="javascript:'.
1632: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1633: 'document.Statistics.submit();">';
1634: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1635: $link,'</a>').$/;
1636: return $html
1637: }
1638:
1639: ####################################################
1640: ####################################################
1641:
1642: =pod
1643:
1644: =back
1645:
1646: =cut
1647:
1648: ####################################################
1649: ####################################################
1650:
1651: 1;
1652:
1653: __END__
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