1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.70 2012/06/21 13:46:10 goltermann 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) = @_;
112: my @resources = $navmap->retrieveResources($sequence,
113: sub { shift->is_problem(); },
114: 0,0,0);
115: return @resources;
116: }
117:
118: ####################################################
119: ####################################################
120:
121: =pod
122:
123: =item &problem_selector($AcceptedResponseTypes)
124:
125: Input: scalar containing regular expression which matches response
126: types to show. '.' will yield all, '(option|radiobutton)' will match
127: all option response and radiobutton problems.
128:
129: Returns: A string containing html for a table which lists the sequences
130: and their contents. A radiobutton is provided for each problem.
131: Skips 'survey' problems.
132:
133: =cut
134:
135: ####################################################
136: ####################################################
137: sub problem_selector {
138: my ($AcceptedResponseTypes,$sequence_addendum,$symbmode,$all,$prefix,$smallbox,$onclick) = @_;
139: # all: also make sequences selectable
140: # prefix: prefix for all form names
141: # smallbox: use smaller box
142: # onclick: javascript to execute when clicked
143: my $Str;
144: my $jsadd='';
145: if ($onclick) {
146: $jsadd="onClick='$onclick'";
147: }
148: $Str = &Apache::loncommon::start_scrollbox(($smallbox?'420px':'620px'),
149: ($smallbox?'400px':'600px'),
150: ($smallbox?'60px':'300px')).
151: &Apache::loncommon::start_data_table();
152: my $rb_count =0;
153: my ($navmap,@sequences) =
154: &Apache::lonstatistics::selected_sequences_with_assessments('all');
155: return $navmap if (! ref($navmap)); # error
156: foreach my $seq (@sequences) {
157: my $seq_str = '';
158: foreach my $res (&get_resources($navmap,$seq)) {
159: foreach my $part (@{$res->parts}) {
160: my @response_ids = $res->responseIds($part);
161: my @response_types = $res->responseType($part);
162: for (my $i=0;$i<scalar(@response_types);$i++){
163: my $respid = $response_ids[$i];
164: my $resptype = $response_types[$i];
165: if ($resptype =~ m/$AcceptedResponseTypes/) {
166: my $value = &make_target_id({symb=>$res->symb,
167: part=>$part,
168: respid=>$respid,
169: resptype=>$resptype});
170: my $checked = '';
171: if ($env{'form.problemchoice'} eq $value) {
172: $checked = ' checked="checked"';
173: }
174: my $title = $res->compTitle;
175: if (! defined($title) || $title eq '') {
176: ($title) = ($res->src =~ m:/([^/]*)$:);
177: }
178: $seq_str .= &Apache::loncommon::start_data_table_row().
179: ($symbmode?
180: '<td><input type="radio" id="'.$prefix.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' '.
181: $jsadd.
182: ' /></td>'
183: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
184: '<td><label for="'.$prefix.$rb_count.'">'.$resptype.'</label></td>'.
185: '<td><label for="'.$prefix.$rb_count.'">'.$title.'</label>';
186: if (scalar(@response_ids) > 1) {
187: $seq_str .= &mt('response').' '.$respid;
188: }
189: my $link = $res->link.'?symb='.&escape($res->shown_symb);
190: $seq_str .= (' 'x2).
191: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
192: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
193: $rb_count++;
194: }
195: }
196: }
197: }
198: if ($seq_str ne '') {
199: $Str .= &Apache::loncommon::start_data_table_header_row().
200: '<th colspan="3">'.
201: ($all?'<input type="radio" id="'.$prefix.'s'.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($seq->symb,'<>&').'" '.$jsadd.' />':'').
202: $seq->compTitle.'</th>'.
203: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
204: if (defined($sequence_addendum)) {
205: $Str .= &Apache::loncommon::start_data_table_header_row().
206: ('<td> </td>'x2).
207: '<td align="right">'.$sequence_addendum.'</td>'.
208: &Apache::loncommon::end_data_table_header_row()."\n";
209: }
210: }
211:
212: }
213: $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
214: return $Str;
215: }
216:
217: ####################################################
218: ####################################################
219:
220: =pod
221:
222: =item &MultipleProblemSelector($navmap,$selected,$inputname)
223:
224: Generate HTML with checkboxes for problem selection.
225:
226: Input:
227:
228: $navmap: a navmap object. If undef, navmaps will be called to create a
229: new object.
230:
231: $selected: Scalar, Array, or hash reference of currently selected items.
232:
233: $inputname: The name of the form elements to use for the checkboxs.
234:
235: Returns: A string containing html for a table which lists the sequences
236: and their contents. A checkbox is provided for each problem.
237:
238: =cut
239:
240: ####################################################
241: ####################################################
242: sub MultipleProblemSelector {
243: my ($navmap,$inputname,$formname,$anoncounter)=@_;
244: my $cid = $env{'request.course.id'};
245: my $Str;
246: # Massage the input as needed.
247: if (! defined($navmap)) {
248: $navmap = Apache::lonnavmaps::navmap->new();
249: if (! defined($navmap)) {
250: $Str .= '<div class="LC_error">'
251: .&mt('Error: cannot process course structure')
252: .'</div>';
253: return $Str;
254: }
255: }
256: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
257: # Header
258: $Str .= <<"END";
259: <script type="text/javascript" language="JavaScript">
260: function checkall(value,seqid) {
261: for (i=0; i<document.forms.$formname.elements.length; i++) {
262: ele = document.forms.$formname.elements[i];
263: if (ele.name == '$inputname') {
264: if (seqid != null) {
265: itemid = document.forms.$formname.elements[i].id;
266: thing = itemid.split(':');
267: if (thing[0] == seqid) {
268: document.forms.$formname.elements[i].checked=value;
269: }
270: } else {
271: document.forms.$formname.elements[i].checked=value;
272: }
273: }
274: }
275: }
276: </script>
277: END
278: my $checkanonjs = <<"END";
279:
280: <script type="text/javascript" language="JavaScript">
281: function checkanon() {
282: return true;
283: }
284: </script>
285:
286: END
287: if (ref($anoncounter) eq 'HASH') {
288: if (keys(%{$anoncounter}) > 0) {
289: my $anonwarning = &mt('Your selection includes both problems with and without anonymous submissions.').'\n'.&mt('You must select either only anonymous or only named problems.').'\n\n'.&mt('If a selection contains both anonymous and named parts, [_1]use the Anoymous/Named buttons to ensure selections will be either all anonymous [_1]or all named.','\n');
290: $checkanonjs = <<"END";
291:
292: <script type="text/javascript" language="JavaScript">
293: function checkanon() {
294: anoncount = 0;
295: namedcount = 0;
296: for (i=0; i<document.forms.$formname.elements.length; i++) {
297: ele = document.forms.$formname.elements[i];
298: if (ele.name == '$inputname') {
299: itemid = document.forms.$formname.elements[i].id;
300: if (document.forms.$formname.elements[i].checked) {
301: anonid = 'anonymous_'+itemid;
302: mixid = 'mixed_'+itemid;
303: anonele = document.getElementById(anonid);
304: mixele = document.getElementById(mixid);
305: if (anonele.value > 0) {
306: if (mixele.value == 'none') {
307: anoncount ++;
308: } else {
309: if (mixele.value == '0') {
310: if (mixele.checked) {
311: anoncount ++;
312: } else {
313: namedcount ++;
314: }
315: } else {
316: namedcount ++;
317: }
318: }
319: } else {
320: namedcount ++;
321: }
322: }
323: }
324: }
325: if (anoncount > 0 && namedcount > 0) {
326: alert("$anonwarning");
327: return false;
328: }
329: }
330: </script>
331:
332: END
333: }
334: }
335: $Str .= $checkanonjs.
336: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
337: (' 'x4).
338: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
339: $Str .= $/.'<table>'.$/;
340: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
341: my $sequence_string;
342: my $seq_id = 0;
343: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
344: '',
345: '',
346: $seq_id++,
347: $inputname));
348: my @Sequence_Data;
349: while (my $curRes = $iterator->next()) {
350: if ($curRes == $iterator->END_MAP) {
351: if (ref($Accumulator[-1]) eq 'CODE') {
352: my $old_accumulator = pop(@Accumulator);
353: push(@Sequence_Data,&{$old_accumulator}());
354: }
355: } elsif ($curRes == $iterator->BEGIN_MAP) {
356: # Not much to do here.
357: }
358: next if (! ref($curRes));
359: if ($curRes->is_map) {
360: push(@Accumulator,&new_accumulator($curRes->compTitle,
361: $curRes->src,
362: $curRes->symb,
363: $seq_id++,
364: $inputname));
365: } elsif ($curRes->is_problem) {
366: my $anonpart = 0;
367: my $namedpart = 0;
368: my @parts = @{$curRes->parts()};
369: if (ref($anoncounter) eq 'HASH') {
370: if (keys(%{$anoncounter}) > 0) {
371: my @parts = @{$curRes->parts()};
372: my $symb = $curRes->symb();
373: foreach my $part (@parts) {
374: if ((exists($anoncounter->{$symb."\0".$part})) ||
375: $curRes->is_anonsurvey($part)) {
376: $anonpart ++;
377: } else {
378: $namedpart ++
379: }
380: }
381: }
382: }
383: if (@Accumulator && $Accumulator[-1] ne '') {
384: &{$Accumulator[-1]}($curRes,
385: exists($selected->{$curRes->symb}),
386: $anonpart,$namedpart);
387: }
388: }
389: }
390: my $course_seq = pop(@Sequence_Data);
391: foreach my $seq ($course_seq,@Sequence_Data) {
392: #my $seq = pop(@Sequence_Data);
393: next if (! defined($seq) || ref($seq) ne 'HASH');
394: $Str.= '<tr><td colspan="2">'.
395: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
396: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
397: &mt('Select').'</a>'.(' 'x2).
398: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
399: &mt('Unselect').'</a>'.(' 'x2).
400: '</td></tr>'.$/;
401: $Str.= $seq->{'html'};
402: }
403: $Str .= '</table>'.$/;
404: return $Str;
405: }
406:
407: sub new_accumulator {
408: my ($title,$src,$symb,$seq_id,$inputname) = @_;
409: my $target;
410: my $item_id=0;
411: return
412: sub {
413: if (@_) {
414: my ($res,$checked,$anonpart,$namedpart) = @_;
415: $target.='<tr><td><label>'.
416: '<input type="checkbox" name="'.$inputname.'" ';
417: if ($checked) {
418: $target .= 'checked="checked" ';
419: }
420: my $anon_id = $item_id;
421: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
422: my $esc_symb = &escape($res->symb);
423: $target.=
424: 'value="'.$esc_symb.'" />'.
425: ' '.$res->compTitle.'</label>'.
426: (' 'x2).'<a target="preview" '.
427: 'href="'.$res->link.'?symb='.
428: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
429: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
430: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
431: if ($anonpart) {
432: if ($namedpart) {
433: my $checknamed = '';
434: my $checkedanon = ' checked="checked"';
435: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
436: $checknamed = $checkedanon;
437: $checkedanon = '';
438: }
439: $mixed = ' ('.
440: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
441: '<span class="LC_nobreak"><label>'.
442: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
443: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
444: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
445: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
446: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
447: '</label></span>').')';
448: } else {
449: $target .= ' '.&mt('(Anonymous Survey)');
450: }
451: }
452: $target.= $mixed.'</td></tr>'.$/;
453: } else {
454: if (defined($target)) {
455: return { title => $title,
456: symb => $symb,
457: src => $src,
458: id => $seq_id,
459: html => $target, };
460: }
461: return undef;
462: }
463: };
464: }
465:
466: sub get_selected_symbs {
467: my ($inputfield) = @_;
468: my $field = 'form.'.$inputfield;
469: my @symbs = (map {
470: &unescape($_);
471: } &Apache::loncommon::get_env_multiple($field));
472: return @symbs;
473: }
474:
475: ####################################################
476: ####################################################
477:
478: =pod
479:
480: =item &make_target_id($target)
481:
482: Inputs: Hash ref with the following entries:
483: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
484: $target->{'resptype'}.
485:
486: Returns: A string, suitable for a form parameter, which uniquely identifies
487: the problem, part, and response to do statistical analysis on.
488:
489: Used by Apache::lonstathelpers::ProblemSelector().
490:
491: =cut
492:
493: ####################################################
494: ####################################################
495: sub make_target_id {
496: my ($target) = @_;
497: my $id = &escape($target->{'symb'}).':'.
498: &escape($target->{'part'}).':'.
499: &escape($target->{'respid'}).':'.
500: &escape($target->{'resptype'});
501: return $id;
502: }
503:
504: ####################################################
505: ####################################################
506:
507: =pod
508:
509: =item &get_target_from_id($id)
510:
511: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
512:
513: Returns: A hash reference, $target, containing the following keys:
514: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
515: $target->{'resptype'}.
516:
517: =cut
518:
519: ####################################################
520: ####################################################
521: sub get_target_from_id {
522: my ($id) = @_;
523: if (! ref($id)) {
524: my ($symb,$part,$respid,$resptype) = split(':',$id);
525: return ({ symb => &unescape($symb),
526: part => &unescape($part),
527: respid => &unescape($respid),
528: resptype => &unescape($resptype)});
529: } elsif (ref($id) eq 'ARRAY') {
530: my @Return;
531: foreach my $selected (@$id) {
532: my ($symb,$part,$respid,$resptype) = split(':',$selected);
533: push(@Return,{ symb => &unescape($symb),
534: part => &unescape($part),
535: respid => &unescape($respid),
536: resptype => &unescape($resptype)});
537: }
538: return \@Return;
539: }
540: }
541:
542: ####################################################
543: ####################################################
544:
545: =pod
546:
547: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
548:
549: Determine the problem parts or responses preceeding and following the
550: current resource.
551:
552: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
553: $AcceptableResponseTypes, regular expression matching acceptable
554: response types,
555: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
556:
557: Returns: three hash references, $prev, $curr, $next, which refer to the
558: preceeding, current, or following problem parts or responses, depending
559: on the value of $granularity. Values of undef indicate there is no
560: previous or next part/response. A value of undef for all three indicates
561: there was no match found to the current part/resource.
562:
563: The hash references contain the following keys:
564: symb, part, resource
565:
566: If $granularity eq 'response', the following ADDITIONAL keys will be present:
567: respid, resptype
568:
569: =cut
570:
571: ####################################################
572: ####################################################
573: sub get_prev_curr_next {
574: my ($target,$AcceptableResponseTypes,$granularity) = @_;
575: #
576: # Build an array with the data we need to search through
577: my @Resource;
578: my ($navmap,@sequences) =
579: &Apache::lonstatistics::selected_sequences_with_assessments('all');
580: return $navmap if (! ref($navmap));
581: foreach my $seq (@sequences) {
582: my @resources = &get_resources($navmap,$seq);
583: foreach my $res (@resources) {
584: foreach my $part (@{$res->parts}) {
585: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
586: ($granularity eq 'part_survey')) {
587: push (@Resource,
588: { symb => $res->symb,
589: part => $part,
590: resource => $res,
591: } );
592: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
593: push (@Resource,
594: { symb => $res->symb,
595: part => $part,
596: resource => $res,
597: } );
598: } elsif ($granularity eq 'part') {
599: push (@Resource,
600: { symb => $res->symb,
601: part => $part,
602: resource => $res,
603: } );
604: } elsif ($granularity eq 'response') {
605: my @response_ids = $res->responseIds($part);
606: my @response_types = $res->responseType($part);
607: for (my $i=0;
608: $i<scalar(@response_ids);
609: $i++){
610: my $respid = $response_ids[$i];
611: my $resptype = $response_types[$i];
612: next if ($resptype !~ m/$AcceptableResponseTypes/);
613: push (@Resource,
614: { symb => $res->symb,
615: part => $part,
616: respid => $respid,
617: resptype => $resptype,
618: resource => $res,
619: } );
620: }
621: }
622: }
623: }
624: }
625: #
626: # Get the index of the current situation
627: my $curr_idx;
628: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
629: my $curr_item = $Resource[$curr_idx];
630: if ($granularity =~ /^(part|part_survey|part_task)$/) {
631: if ($curr_item->{'symb'} eq $target->{'symb'} &&
632: $curr_item->{'part'} eq $target->{'part'}) {
633: last;
634: }
635: } elsif ($granularity eq 'response') {
636: if ($curr_item->{'symb'} eq $target->{'symb'} &&
637: $curr_item->{'part'} eq $target->{'part'} &&
638: $curr_item->{'respid'} eq $target->{'respid'} &&
639: $curr_item->{'resptype'} eq $target->{'resptype'}) {
640: last;
641: }
642: }
643: }
644: my $curr_item = $Resource[$curr_idx];
645: if ($granularity =~ /^(part|part_survey|part_task)$/) {
646: if ($curr_item->{'symb'} ne $target->{'symb'} ||
647: $curr_item->{'part'} ne $target->{'part'}) {
648: # bogus symb - return nothing
649: return (undef,undef,undef);
650: }
651: } elsif ($granularity eq 'response') {
652: if ($curr_item->{'symb'} ne $target->{'symb'} ||
653: $curr_item->{'part'} ne $target->{'part'} ||
654: $curr_item->{'respid'} ne $target->{'respid'} ||
655: $curr_item->{'resptype'} ne $target->{'resptype'}){
656: # bogus symb - return nothing
657: return (undef,undef,undef);
658: }
659: }
660: #
661: # Now just pick up the data we need
662: my ($prev,$curr,$next);
663: if ($curr_idx == 0) {
664: $prev = undef;
665: $curr = $Resource[$curr_idx ];
666: $next = $Resource[$curr_idx+1];
667: } elsif ($curr_idx == $#Resource) {
668: $prev = $Resource[$curr_idx-1];
669: $curr = $Resource[$curr_idx ];
670: $next = undef;
671: } else {
672: $prev = $Resource[$curr_idx-1];
673: $curr = $Resource[$curr_idx ];
674: $next = $Resource[$curr_idx+1];
675: }
676: return ($navmap,$prev,$curr,$next);
677: }
678:
679:
680: #####################################################
681: #####################################################
682:
683: =pod
684:
685: =item GetStudentAnswers($r,$problem,$Students)
686:
687: Determines the correct answer for a set of students on a given problem.
688: The students answers are stored in the student hashes pointed to by the
689: array @$Students under the key 'answer'.
690:
691: Inputs: $r
692: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
693: $Students: reference to array containing student hashes (need 'username',
694: 'domain').
695:
696: Returns: nothing
697:
698: =cut
699:
700: #####################################################
701: #####################################################
702: sub GetStudentAnswers {
703: my ($r,$problem,$Students,$formname,$inputname) = @_;
704: my %answers;
705: my $status_type;
706: if (defined($formname)) {
707: $status_type = 'inline';
708: } else {
709: $status_type = 'popup';
710: }
711: my $c = $r->connection();
712: my %Answers;
713: my ($resource,$partid,$respid) = ($problem->{'resource'},
714: $problem->{'part'},
715: $problem->{'respid'});
716: # Read in the cache (if it exists) before we start timing things.
717: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
718: # Open progress window
719: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$Students));
720: $r->rflush();
721: foreach my $student (@$Students) {
722: last if ($c->aborted());
723: my $sname = $student->{'username'};
724: my $sdom = $student->{'domain'};
725: my $answer = &Apache::lonstathelpers::get_student_answer
726: ($resource,$sname,$sdom,$partid,$respid);
727: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
728: 'last student');
729: $answers{$answer}++;
730: $student->{'answer'} = $answer;
731: }
732: &Apache::lonstathelpers::write_analysis_cache();
733: return if ($c->aborted());
734: $r->rflush();
735: # close progress window
736: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
737: return \%answers;
738: }
739:
740: #####################################################
741: #####################################################
742:
743: =pod
744:
745: =item analyze_problem_as_student
746:
747: Analyzes a homework problem for a student
748:
749: Inputs: $resource: a resource object
750: $sname, $sdom, $partid, $respid
751:
752: Returns: the problem analysis hash
753:
754: =cut
755:
756: #####################################################
757: #####################################################
758: sub analyze_problem_as_student {
759: my ($resource,$sname,$sdom) = @_;
760: if (ref($resource) ne 'HASH') {
761: my $res = $resource;
762: $resource = { 'src' => $res->src,
763: 'symb' => $res->symb,
764: 'parts' => $res->parts };
765: foreach my $part (@{$resource->{'parts'}}) {
766: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
767: [$res->responseIds($part)];
768: }
769: }
770: my $url = $resource->{'src'};
771: my $symb = $resource->{'symb'};
772: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
773: if (! defined($analysis)) {
774: my $courseid = $env{'request.course.id'};
775: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
776: 'grade_domain' => $sdom,
777: 'grade_username' => $sname,
778: 'grade_symb' => $symb,
779: 'grade_courseid' => $courseid));
780: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
781: &store_analysis($sname,$sdom,$symb,$analysis);
782: }
783: my %Answer=&Apache::lonnet::str2hash($analysis);
784: #
785: return \%Answer;
786: }
787:
788: #####################################################
789: #####################################################
790:
791: =pod
792:
793: =item get_student_answer
794:
795: Analyzes a homework problem for a particular student and returns the correct
796: answer. Attempts to put together an answer for problem types
797: that do not natively support it.
798:
799: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
800: $sname, $sdom, $partid, $respid
801:
802: Returns: $answer
803:
804: If $partid and $respid are specified, $answer is simply a scalar containing
805: the correct answer for the response.
806:
807: If $partid or $respid are undefined, $answer will be a hash reference with
808: keys $partid.'.'.$respid.'.answer'.
809:
810: =cut
811:
812: #####################################################
813: #####################################################
814: sub get_student_answer {
815: my ($resource,$sname,$sdom,$partid,$respid) = @_;
816: #
817: if (ref($resource) ne 'HASH') {
818: my $res = $resource;
819: $resource = { 'src' => $res->src,
820: 'symb' => $res->symb,
821: 'parts' => $res->parts };
822: foreach my $part (@{$resource->{'parts'}}) {
823: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
824: [$res->responseIds($part)];
825: }
826: }
827: #
828: my $analysis =
829: &analyze_problem_as_student($resource,$sname,$sdom);
830: my $answer;
831: foreach my $partid (@{$resource->{'parts'}}) {
832: my $partdata = $resource->{'partdata'}->{$partid};
833: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
834: my $prefix = $partid.'.'.$respid;
835: my $key = $prefix.'.answer';
836: $answer->{$partid}->{$respid} =
837: &get_answer($prefix,$key,%$analysis);
838: }
839: }
840: my $returnvalue;
841: if (! defined($partid)) {
842: $returnvalue = $answer;
843: } elsif (! defined($respid)) {
844: $returnvalue = $answer->{$partid};
845: } else {
846: $returnvalue = $answer->{$partid}->{$respid};
847: }
848: return $returnvalue;
849: }
850:
851: sub get_answer {
852: my ($prefix,$key,%Answer) = @_;
853: my $returnvalue;
854: if (exists($Answer{$key})) {
855: if (ref($Answer{$key}) eq 'HASH') {
856: my $which = 'INTERNAL';
857: if (!exists($Answer{$key}{$which})) {
858: $which = (sort(keys(%{ $Answer{$key} })))[0];
859: }
860: my $student_answer = $Answer{$key}{$which}[0][0];
861: $returnvalue = $student_answer;
862: } else {
863: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
864: }
865: } else {
866: if (exists($Answer{$prefix.'.shown'})) {
867: # The response has foils
868: my %values;
869: while (my ($k,$v) = each(%Answer)) {
870: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
871: my $foilname = $2;
872: $values{$foilname}=$v;
873: }
874: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
875: if (ref($values{$foil}) eq 'ARRAY') {
876: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
877: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
878: } else {
879: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
880: &HTML::Entities::encode($values{$foil},'<>&"').'&';
881: }
882: }
883: $returnvalue =~ s/ /\%20/g;
884: chop ($returnvalue);
885: }
886: }
887: return $returnvalue;
888: }
889:
890: #####################################################
891: #####################################################
892:
893: =pod
894:
895: =item Caching routines
896:
897: =over 4
898:
899: =item &load_analysis_cache($symb)
900:
901: Loads the cache for the given symb into memory from disk.
902: Requires the cache filename be set.
903: Only should be called by &ensure_proper_cache.
904:
905: =cut
906:
907: #####################################################
908: #####################################################
909: {
910: my $cache_filename = undef;
911: my $current_symb = undef;
912: my %cache;
913:
914: sub load_analysis_cache {
915: my ($symb) = @_;
916: return if (! defined($cache_filename));
917: if (! defined($current_symb) || $current_symb ne $symb) {
918: undef(%cache);
919: my $storedstring;
920: my %cache_db;
921: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
922: $storedstring = $cache_db{&escape($symb)};
923: untie(%cache_db);
924: }
925: if (defined($storedstring)) {
926: %cache = %{thaw($storedstring)};
927: }
928: }
929: return;
930: }
931:
932: #####################################################
933: #####################################################
934:
935: =pod
936:
937: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
938:
939: Returns the appropriate data from the cache, or undef if no data exists.
940:
941: =cut
942:
943: #####################################################
944: #####################################################
945: sub get_from_analysis_cache {
946: my ($sname,$sdom,$symb) = @_;
947: &ensure_proper_cache($symb);
948: my $returnvalue;
949: if (exists($cache{$sname.':'.$sdom})) {
950: $returnvalue = $cache{$sname.':'.$sdom};
951: } else {
952: $returnvalue = undef;
953: }
954: return $returnvalue;
955: }
956:
957: #####################################################
958: #####################################################
959:
960: =pod
961:
962: =item &write_analysis_cache($symb)
963:
964: Writes the in memory cache to disk so that it can be read in with
965: &load_analysis_cache($symb).
966:
967: =cut
968:
969: #####################################################
970: #####################################################
971: sub write_analysis_cache {
972: return if (! defined($current_symb) || ! defined($cache_filename));
973: my %cache_db;
974: my $key = &escape($current_symb);
975: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
976: my $storestring = freeze(\%cache);
977: $cache_db{$key}=$storestring;
978: $cache_db{$key.'.time'}=time;
979: untie(%cache_db);
980: }
981: undef(%cache);
982: undef($current_symb);
983: undef($cache_filename);
984: return;
985: }
986:
987: #####################################################
988: #####################################################
989:
990: =pod
991:
992: =item &ensure_proper_cache($symb)
993:
994: Called to make sure we have the proper cache set up. This is called
995: prior to every analysis lookup.
996:
997: =cut
998:
999: #####################################################
1000: #####################################################
1001: sub ensure_proper_cache {
1002: my ($symb) = @_;
1003: my $cid = $env{'request.course.id'};
1004: my $new_filename = LONCAPA::tempdir() .
1005: 'problemanalysis_'.$cid.'_analysis_cache.db';
1006: if (! defined($cache_filename) ||
1007: $cache_filename ne $new_filename ||
1008: ! defined($current_symb) ||
1009: $current_symb ne $symb) {
1010: $cache_filename = $new_filename;
1011: # Notice: $current_symb is not set to $symb until after the cache is
1012: # loaded. This is what tells &load_analysis_cache to load in a new
1013: # symb cache.
1014: &load_analysis_cache($symb);
1015: $current_symb = $symb;
1016: }
1017: }
1018:
1019: #####################################################
1020: #####################################################
1021:
1022: =pod
1023:
1024: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1025:
1026: Stores the analysis data in the in memory cache.
1027:
1028: =cut
1029:
1030: #####################################################
1031: #####################################################
1032: sub store_analysis {
1033: my ($sname,$sdom,$symb,$dataset) = @_;
1034: return if ($symb ne $current_symb);
1035: $cache{$sname.':'.$sdom}=$dataset;
1036: return;
1037: }
1038:
1039: }
1040: #####################################################
1041: #####################################################
1042:
1043: =pod
1044:
1045: =back
1046:
1047: =cut
1048:
1049: #####################################################
1050: #####################################################
1051:
1052: ##
1053: ## The following is copied from datecalc1.pl, part of the
1054: ## Spreadsheet::WriteExcel CPAN module.
1055: ##
1056: ##
1057: ######################################################################
1058: #
1059: # Demonstration of writing date/time cells to Excel spreadsheets,
1060: # using UNIX/Perl time as source of date/time.
1061: #
1062: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1063: #
1064: ######################################################################
1065: #
1066: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1067: # measured in seconds.
1068: #
1069: # An Excel file can use exactly one of two different date/time systems.
1070: # In these systems, a floating point number represents the number of days
1071: # (and fractional parts of the day) since a start point. The floating point
1072: # number is referred to as a 'serial'.
1073: # The two systems ('1900' and '1904') use different starting points:
1074: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1075: # a leap year - see:
1076: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1077: # for the excuse^H^H^H^H^H^Hreason.
1078: # '1904'; '1.00' is 2 Jan 1904.
1079: #
1080: # The '1904' system is the default for Apple Macs. Windows versions of
1081: # Excel have the option to use the '1904' system.
1082: #
1083: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1084: # regard 1900 as a leap year, and thus its serials do not agree with
1085: # the 1900 serials of Excel for dates before 1 Mar 1900.
1086: #
1087: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1088: # regard 1900 as a leap year, and thus its serials do not agree with
1089: # the 1900 serials of Excel for dates before 1 Mar 1900.
1090: #
1091: ######################################################################
1092: #
1093: # Calculation description
1094: # =======================
1095: #
1096: # 1900 system
1097: # -----------
1098: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1099: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1100: # were leap years with an extra day.
1101: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1102: # 1 Jan 1970.
1103: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1104: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1105: #
1106: # 1904 system
1107: # -----------
1108: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1109: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1110: # were leap years with an extra day.
1111: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1112: # 1 Jan 1970.
1113: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1114: #
1115: ######################################################################
1116: #
1117: # Copyright (c) 2000, Andrew Benham.
1118: # This program is free software. It may be used, redistributed and/or
1119: # modified under the same terms as Perl itself.
1120: #
1121: # Andrew Benham, adsb@bigfoot.com
1122: # London, United Kingdom
1123: # 11 Nov 2000
1124: #
1125: ######################################################################
1126: #-----------------------------------------------------------
1127: # calc_serial()
1128: #
1129: # Called with (up to) 2 parameters.
1130: # 1. Unix timestamp. If omitted, uses current time.
1131: # 2. GMT flag. Set to '1' to return serial in GMT.
1132: # If omitted, returns serial in appropriate timezone.
1133: #
1134: # Returns date/time serial according to $DATE_SYSTEM selected
1135: #-----------------------------------------------------------
1136: sub calc_serial {
1137: # Use 1900 date system on all platforms other than Apple Mac (for which
1138: # use 1904 date system).
1139: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1140: my $time = (defined $_[0]) ? $_[0] : time();
1141: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1142: #
1143: # Divide timestamp by number of seconds in a day.
1144: # This gives a date serial with '0' on 1 Jan 1970.
1145: my $serial = $time / 86400;
1146: #
1147: # Adjust the date serial by the offset appropriate to the
1148: # currently selected system (1900/1904).
1149: if ($DATE_SYSTEM == 0) { # use 1900 system
1150: $serial += 25569;
1151: } else { # use 1904 system
1152: $serial += 24107;
1153: }
1154: #
1155: unless ($gmtflag) {
1156: # Now have a 'raw' serial with the right offset. But this
1157: # gives a serial in GMT, which is false unless the timezone
1158: # is GMT. We need to adjust the serial by the appropriate
1159: # timezone offset.
1160: # Calculate the appropriate timezone offset by seeing what
1161: # the differences between localtime and gmtime for the given
1162: # time are.
1163: #
1164: my @gmtime = gmtime($time);
1165: my @ltime = localtime($time);
1166: #
1167: # For the first 7 elements of the two arrays, adjust the
1168: # date serial where the elements differ.
1169: for (0 .. 6) {
1170: my $diff = $ltime[$_] - $gmtime[$_];
1171: if ($diff) {
1172: $serial += _adjustment($diff,$_);
1173: }
1174: }
1175: }
1176: #
1177: # Perpetuate the error that 1900 was a leap year by decrementing
1178: # the serial if we're using the 1900 system and the date is prior to
1179: # 1 Mar 1900. This has the effect of making serial value '60'
1180: # 29 Feb 1900.
1181: #
1182: # This fix only has any effect if UNIX/Perl time on the platform
1183: # can represent 1900. Many can't.
1184: #
1185: unless ($DATE_SYSTEM) {
1186: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1187: }
1188: return $serial;
1189: }
1190:
1191: sub _adjustment {
1192: # Based on the difference in the localtime/gmtime array elements
1193: # number, return the adjustment required to the serial.
1194: #
1195: # We only look at some elements of the localtime/gmtime arrays:
1196: # seconds unlikely to be different as all known timezones
1197: # have an offset of integral multiples of 15 minutes,
1198: # but it's easy to do.
1199: # minutes will be different for timezone offsets which are
1200: # not an exact number of hours.
1201: # hours very likely to be different.
1202: # weekday will differ when localtime/gmtime difference
1203: # straddles midnight.
1204: #
1205: # Assume that difference between localtime and gmtime is less than
1206: # 5 days, then don't have to do maths for day of month, month number,
1207: # year number, etc...
1208: #
1209: my ($delta,$element) = @_;
1210: my $adjust = 0;
1211: #
1212: if ($element == 0) { # Seconds
1213: $adjust = $delta/86400; # 60 * 60 * 24
1214: } elsif ($element == 1) { # Minutes
1215: $adjust = $delta/1440; # 60 * 24
1216: } elsif ($element == 2) { # Hours
1217: $adjust = $delta/24; # 24
1218: } elsif ($element == 6) { # Day of week number
1219: # Catch difference straddling Sat/Sun in either direction
1220: $delta += 7 if ($delta < -4);
1221: $delta -= 7 if ($delta > 4);
1222: #
1223: $adjust = $delta;
1224: }
1225: return $adjust;
1226: }
1227:
1228: ###########################################################
1229: ###########################################################
1230:
1231: =pod
1232:
1233: =item get_problem_data
1234:
1235: Returns a data structure describing the problem.
1236:
1237: Inputs: $url
1238:
1239: Returns: %Partdata
1240:
1241: =cut
1242:
1243: ## note: we must force each foil and option to not begin or end with
1244: ## spaces as they are stored without such data.
1245: ##
1246: ###########################################################
1247: ###########################################################
1248: sub get_problem_data {
1249: my ($url) = @_;
1250: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1251: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1252: my %Answer;
1253: %Answer=&Apache::lonnet::str2hash($Answ);
1254: my %Partdata;
1255: foreach my $part (@{$Answer{'parts'}}) {
1256: while (my($key,$value) = each(%Answer)) {
1257: #
1258: # Logging code:
1259: if (0) {
1260: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1261: if (ref($value) eq 'ARRAY') {
1262: &Apache::lonnet::logthis(' @'.join(',',@$value));
1263: } else {
1264: &Apache::lonnet::logthis(' '.$value);
1265: }
1266: }
1267: # End of logging code
1268: next if ($key !~ /^\Q$part\E/);
1269: $key =~ s/^\Q$part\E\.//;
1270: if (ref($value) eq 'ARRAY') {
1271: if ($key eq 'options') {
1272: $Partdata{$part}->{'_Options'}=$value;
1273: } elsif ($key eq 'concepts') {
1274: $Partdata{$part}->{'_Concepts'}=$value;
1275: } elsif ($key eq 'items') {
1276: $Partdata{$part}->{'_Items'}=$value;
1277: } elsif ($key =~ /^concept\.(.*)$/) {
1278: my $concept = $1;
1279: foreach my $foil (@$value) {
1280: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1281: $concept;
1282: }
1283: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1284: $Partdata{$part}->{$key}=$value;
1285: }
1286: } else {
1287: if ($key=~ /^foil\.text\.(.*)$/) {
1288: my $foil = $1;
1289: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1290: $value =~ s/(\s*$|^\s*)//g;
1291: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1292: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1293: my $foil = $1;
1294: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1295: } elsif ($key eq 'answercomputed') {
1296: $Partdata{$part}->{'answercomputed'} = $value;
1297: }
1298: }
1299: }
1300: }
1301: # Further debugging code
1302: if (0) {
1303: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1304: &log_hash_ref(\%Partdata);
1305: }
1306: return %Partdata;
1307: }
1308:
1309: sub log_array_ref {
1310: my ($arrayref,$prefix) = @_;
1311: return if (ref($arrayref) ne 'ARRAY');
1312: if (! defined($prefix)) { $prefix = ''; };
1313: foreach my $v (@$arrayref) {
1314: if (ref($v) eq 'ARRAY') {
1315: &log_array_ref($v,$prefix.' ');
1316: } elsif (ref($v) eq 'HASH') {
1317: &log_hash_ref($v,$prefix.' ');
1318: } else {
1319: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1320: }
1321: }
1322: }
1323:
1324: sub log_hash_ref {
1325: my ($hashref,$prefix) = @_;
1326: return if (ref($hashref) ne 'HASH');
1327: if (! defined($prefix)) { $prefix = ''; };
1328: while (my ($k,$v) = each(%$hashref)) {
1329: if (ref($v) eq 'ARRAY') {
1330: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1331: &log_array_ref($v,$prefix.' ');
1332: } elsif (ref($v) eq 'HASH') {
1333: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1334: &log_hash_ref($v,$prefix.' ');
1335: } else {
1336: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1337: }
1338: }
1339: }
1340: ####################################################
1341: ####################################################
1342:
1343: =pod
1344:
1345: =item &limit_by_time()
1346:
1347: =cut
1348:
1349: ####################################################
1350: ####################################################
1351: sub limit_by_time_form {
1352: my $Starttime_form = '';
1353: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1354: ('limitby_startdate');
1355: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1356: ('limitby_enddate');
1357: if (! defined($endtime)) {
1358: $endtime = time;
1359: }
1360: if (! defined($starttime)) {
1361: $starttime = $endtime - 60*60*24*7;
1362: }
1363: my $state;
1364: if (&limit_by_time()) {
1365: $state = '';
1366: } else {
1367: $state = 'disabled';
1368: }
1369: my $startdateform = &Apache::lonhtmlcommon::date_setter
1370: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1371: my $enddateform = &Apache::lonhtmlcommon::date_setter
1372: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1373: my $Str;
1374: $Str .= '<script type="text/javascript" language="JavaScript">';
1375: $Str .= 'function toggle_limitby_activity(state) {';
1376: $Str .= ' if (state) {';
1377: $Str .= ' limitby_startdate_enable();';
1378: $Str .= ' limitby_enddate_enable();';
1379: $Str .= ' } else {';
1380: $Str .= ' limitby_startdate_disable();';
1381: $Str .= ' limitby_enddate_disable();';
1382: $Str .= ' }';
1383: $Str .= '}';
1384: $Str .= '</script>';
1385: $Str .= '<fieldset>';
1386: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1387: if (&limit_by_time()) {
1388: $timecheckbox .= ' checked ';
1389: }
1390: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1391: $timecheckbox .= ' />';
1392: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1393: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1394: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1395: $Str .= '</fieldset>';
1396: return $Str;
1397: }
1398:
1399: sub limit_by_time {
1400: if (exists($env{'form.limit_by_time'}) &&
1401: $env{'form.limit_by_time'} ne '' ) {
1402: return 1;
1403: } else {
1404: return 0;
1405: }
1406: }
1407:
1408: sub get_time_limits {
1409: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1410: ('limitby_startdate');
1411: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1412: ('limitby_enddate');
1413: return ($starttime,$endtime);
1414: }
1415:
1416: ####################################################
1417: ####################################################
1418:
1419: =pod
1420:
1421: =item &manage_caches
1422:
1423: Inputs: $r, apache request object
1424:
1425: Returns: An array of scalars containing html for buttons.
1426:
1427: =cut
1428:
1429: ####################################################
1430: ####################################################
1431: sub manage_caches {
1432: my ($r,$formname,$inputname,$update_message) = @_;
1433: &Apache::loncoursedata::clear_internal_caches();
1434: my $sectionkey =
1435: join(',',
1436: map {
1437: &escape($_);
1438: } sort(&Apache::lonstatistics::get_selected_sections())
1439: );
1440: my $statuskey = $Apache::lonstatistics::enrollment_status;
1441: if (exists($env{'form.ClearCache'}) ||
1442: exists($env{'form.updatecaches'}) ||
1443: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1444: (exists($env{'form.prevsection'}) &&
1445: $env{'form.prevsection'} ne $sectionkey) ||
1446: (exists($env{'form.prevenrollstatus'}) &&
1447: $env{'form.prevenrollstatus'} ne $statuskey)
1448: ) {
1449: if (defined($update_message)) {
1450: $r->print($update_message);
1451: }
1452: if (0) {
1453: &Apache::lonnet::logthis('Updating mysql student data caches');
1454: }
1455: &gather_full_student_data($r,$formname,$inputname);
1456: }
1457: #
1458: my @Buttons =
1459: ('<input type="submit" name="ClearCache" '.
1460: 'value="'.&mt('Clear Caches').'" />',
1461: '<input type="submit" name="updatecaches" '.
1462: 'value="'.&mt('Update Caches').'" />'.
1463: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1464: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1465: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1466: );
1467: #
1468: if (! exists($env{'form.firstrun'})) {
1469: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1470: } else {
1471: $r->print('<input type="hidden" name="firstrun" value="no" />');
1472: }
1473: #
1474: return @Buttons;
1475: }
1476:
1477: sub gather_full_student_data {
1478: my ($r,$formname,$inputname) = @_;
1479: my $status_type;
1480: if (defined($formname)) {
1481: $status_type = 'inline';
1482: } else {
1483: $status_type = 'popup';
1484: }
1485: my $c = $r->connection();
1486: #
1487: &Apache::loncoursedata::clear_internal_caches();
1488: #
1489: my @Students = @Apache::lonstatistics::Students;
1490: #
1491: # Open the progress window
1492: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@Students));
1493: #
1494: while (my $student = shift @Students) {
1495: return if ($c->aborted());
1496: my $status = &Apache::loncoursedata::ensure_current_full_data
1497: ($student->{'username'},$student->{'domain'},
1498: $env{'request.course.id'});
1499: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1500: &mt('last student'));
1501: }
1502: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1503: $r->rflush();
1504: return;
1505: }
1506:
1507: ####################################################
1508: ####################################################
1509:
1510: =pod
1511:
1512: =item &submission_report_form
1513:
1514: Input: The originating reportSelected value for the current stats page.
1515:
1516: Output: Scalar containing HTML with needed form elements and a link to
1517: the student submission reports page.
1518:
1519: =cut
1520:
1521: ####################################################
1522: ####################################################
1523: sub submission_report_form {
1524: my ($original_report) = @_;
1525: # Note: In the link below we change the reportSelected value. If
1526: # the user hits the 'back' button on the browser after getting their
1527: # student submissions report, this value may still be around. So we
1528: # output a script block to set it properly. If the $original_report
1529: # value is unset, you are just asking for trouble.
1530: if (! defined($original_report)) {
1531: &Apache::lonnet::logthis
1532: ('someone called lonstathelpers::submission_report_form without '.
1533: ' enough input.');
1534: }
1535: my $html = $/.
1536: '<script type="text/javascript" language="JavaScript">'.
1537: "document.Statistics.reportSelected.value='$original_report';".
1538: '</script>'.
1539: '<input type="hidden" name="correctans" value="true" />'.
1540: '<input type="hidden" name="prob_status" value="true" />'.
1541: '<input type="hidden" name="all_sub" value="true" />';
1542: my $output_selector = $/.'<select name="output">'.$/;
1543: foreach ('HTML','Excel','CSV') {
1544: $output_selector .= ' <option value="'.lc($_).'"';
1545: if ($env{'form.output'} eq lc($_)) {
1546: $output_selector .= ' selected ';
1547: }
1548: $output_selector .='>'.&mt($_).'</option>'.$/;
1549: }
1550: $output_selector .= '</select>'.$/;
1551: my $link = '<a href="javascript:'.
1552: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1553: 'document.Statistics.submit();">';
1554: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1555: $link,'</a>').$/;
1556: return $html
1557: }
1558:
1559: ####################################################
1560: ####################################################
1561:
1562: =pod
1563:
1564: =back
1565:
1566: =cut
1567:
1568: ####################################################
1569: ####################################################
1570:
1571: 1;
1572:
1573: __END__
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