1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.74 2015/06/09 21:23:02 damieng 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 Anonymous/Named buttons to ensure selections will be either all anonymous[_1]or all named.',"\n");
290: &js_escape(\$anonwarning);
291: $checkanonjs = <<"END";
292:
293: <script type="text/javascript" language="JavaScript">
294: function checkanon() {
295: anoncount = 0;
296: namedcount = 0;
297: for (i=0; i<document.forms.$formname.elements.length; i++) {
298: ele = document.forms.$formname.elements[i];
299: if (ele.name == '$inputname') {
300: itemid = document.forms.$formname.elements[i].id;
301: if (document.forms.$formname.elements[i].checked) {
302: anonid = 'anonymous_'+itemid;
303: mixid = 'mixed_'+itemid;
304: anonele = document.getElementById(anonid);
305: mixele = document.getElementById(mixid);
306: if (anonele.value > 0) {
307: if (mixele.value == 'none') {
308: anoncount ++;
309: } else {
310: if (mixele.value == '0') {
311: if (mixele.checked) {
312: anoncount ++;
313: } else {
314: namedcount ++;
315: }
316: } else {
317: namedcount ++;
318: }
319: }
320: } else {
321: namedcount ++;
322: }
323: }
324: }
325: }
326: if (anoncount > 0 && namedcount > 0) {
327: alert("$anonwarning");
328: return false;
329: }
330: }
331: </script>
332:
333: END
334: }
335: }
336: $Str .= $checkanonjs.
337: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
338: (' 'x4).
339: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
340: $Str .= $/.'<table>'.$/;
341: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
342: my $sequence_string;
343: my $seq_id = 0;
344: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
345: '',
346: '',
347: $seq_id++,
348: $inputname));
349: my @Sequence_Data;
350: while (my $curRes = $iterator->next()) {
351: if ($curRes == $iterator->END_MAP) {
352: if (ref($Accumulator[-1]) eq 'CODE') {
353: my $old_accumulator = pop(@Accumulator);
354: push(@Sequence_Data,&{$old_accumulator}());
355: }
356: } elsif ($curRes == $iterator->BEGIN_MAP) {
357: # Not much to do here.
358: }
359: next if (! ref($curRes));
360: if ($curRes->is_map) {
361: push(@Accumulator,&new_accumulator($curRes->compTitle,
362: $curRes->src,
363: $curRes->symb,
364: $seq_id++,
365: $inputname));
366: } elsif ($curRes->is_problem) {
367: my $anonpart = 0;
368: my $namedpart = 0;
369: my @parts = @{$curRes->parts()};
370: if (ref($anoncounter) eq 'HASH') {
371: if (keys(%{$anoncounter}) > 0) {
372: my @parts = @{$curRes->parts()};
373: my $symb = $curRes->symb();
374: foreach my $part (@parts) {
375: if ((exists($anoncounter->{$symb."\0".$part})) ||
376: $curRes->is_anonsurvey($part)) {
377: $anonpart ++;
378: } else {
379: $namedpart ++
380: }
381: }
382: }
383: }
384: if (@Accumulator && $Accumulator[-1] ne '') {
385: &{$Accumulator[-1]}($curRes,
386: exists($selected->{$curRes->symb}),
387: $anonpart,$namedpart);
388: }
389: }
390: }
391: my $course_seq = pop(@Sequence_Data);
392: foreach my $seq ($course_seq,@Sequence_Data) {
393: #my $seq = pop(@Sequence_Data);
394: next if (! defined($seq) || ref($seq) ne 'HASH');
395: $Str.= '<tr><td colspan="2">'.
396: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
397: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
398: &mt('Select').'</a>'.(' 'x2).
399: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
400: &mt('Unselect').'</a>'.(' 'x2).
401: '</td></tr>'.$/;
402: $Str.= $seq->{'html'};
403: }
404: $Str .= '</table>'.$/;
405: return $Str;
406: }
407:
408: sub new_accumulator {
409: my ($title,$src,$symb,$seq_id,$inputname) = @_;
410: my $target;
411: my $item_id=0;
412: return
413: sub {
414: if (@_) {
415: my ($res,$checked,$anonpart,$namedpart) = @_;
416: $target.='<tr><td><label>'.
417: '<input type="checkbox" name="'.$inputname.'" ';
418: if ($checked) {
419: $target .= 'checked="checked" ';
420: }
421: my $anon_id = $item_id;
422: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
423: my $esc_symb = &escape($res->symb);
424: $target.=
425: 'value="'.$esc_symb.'" />'.
426: ' '.$res->compTitle.'</label>'.
427: (' 'x2).'<a target="preview" '.
428: 'href="'.$res->link.'?symb='.
429: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
430: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
431: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
432: if ($anonpart) {
433: if ($namedpart) {
434: my $checknamed = '';
435: my $checkedanon = ' checked="checked"';
436: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
437: $checknamed = $checkedanon;
438: $checkedanon = '';
439: }
440: $mixed = ' ('.
441: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
442: '<span class="LC_nobreak"><label>'.
443: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
444: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
445: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
446: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
447: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
448: '</label></span>').')';
449: } else {
450: $target .= ' '.&mt('(Anonymous Survey)');
451: }
452: }
453: $target.= $mixed.'</td></tr>'.$/;
454: } else {
455: if (defined($target)) {
456: return { title => $title,
457: symb => $symb,
458: src => $src,
459: id => $seq_id,
460: html => $target, };
461: }
462: return undef;
463: }
464: };
465: }
466:
467: sub get_selected_symbs {
468: my ($inputfield) = @_;
469: my $field = 'form.'.$inputfield;
470: my @symbs = (map {
471: &unescape($_);
472: } &Apache::loncommon::get_env_multiple($field));
473: return @symbs;
474: }
475:
476: ####################################################
477: ####################################################
478:
479: =pod
480:
481: =item &make_target_id($target)
482:
483: Inputs: Hash ref with the following entries:
484: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
485: $target->{'resptype'}.
486:
487: Returns: A string, suitable for a form parameter, which uniquely identifies
488: the problem, part, and response to do statistical analysis on.
489:
490: Used by Apache::lonstathelpers::ProblemSelector().
491:
492: =cut
493:
494: ####################################################
495: ####################################################
496: sub make_target_id {
497: my ($target) = @_;
498: my $id = &escape($target->{'symb'}).':'.
499: &escape($target->{'part'}).':'.
500: &escape($target->{'respid'}).':'.
501: &escape($target->{'resptype'});
502: return $id;
503: }
504:
505: ####################################################
506: ####################################################
507:
508: =pod
509:
510: =item &get_target_from_id($id)
511:
512: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
513:
514: Returns: A hash reference, $target, containing the following keys:
515: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
516: $target->{'resptype'}.
517:
518: =cut
519:
520: ####################################################
521: ####################################################
522: sub get_target_from_id {
523: my ($id) = @_;
524: if (! ref($id)) {
525: my ($symb,$part,$respid,$resptype) = split(':',$id);
526: return ({ symb => &unescape($symb),
527: part => &unescape($part),
528: respid => &unescape($respid),
529: resptype => &unescape($resptype)});
530: } elsif (ref($id) eq 'ARRAY') {
531: my @Return;
532: foreach my $selected (@$id) {
533: my ($symb,$part,$respid,$resptype) = split(':',$selected);
534: push(@Return,{ symb => &unescape($symb),
535: part => &unescape($part),
536: respid => &unescape($respid),
537: resptype => &unescape($resptype)});
538: }
539: return \@Return;
540: }
541: }
542:
543: ####################################################
544: ####################################################
545:
546: =pod
547:
548: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
549:
550: Determine the problem parts or responses preceeding and following the
551: current resource.
552:
553: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
554: $AcceptableResponseTypes, regular expression matching acceptable
555: response types,
556: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
557:
558: Returns: three hash references, $prev, $curr, $next, which refer to the
559: preceeding, current, or following problem parts or responses, depending
560: on the value of $granularity. Values of undef indicate there is no
561: previous or next part/response. A value of undef for all three indicates
562: there was no match found to the current part/resource.
563:
564: The hash references contain the following keys:
565: symb, part, resource
566:
567: If $granularity eq 'response', the following ADDITIONAL keys will be present:
568: respid, resptype
569:
570: =cut
571:
572: ####################################################
573: ####################################################
574: sub get_prev_curr_next {
575: my ($target,$AcceptableResponseTypes,$granularity) = @_;
576: #
577: # Build an array with the data we need to search through
578: my @Resource;
579: my ($navmap,@sequences) =
580: &Apache::lonstatistics::selected_sequences_with_assessments('all');
581: return $navmap if (! ref($navmap));
582: foreach my $seq (@sequences) {
583: my @resources = &get_resources($navmap,$seq);
584: foreach my $res (@resources) {
585: foreach my $part (@{$res->parts}) {
586: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
587: ($granularity eq 'part_survey')) {
588: push (@Resource,
589: { symb => $res->symb,
590: part => $part,
591: resource => $res,
592: } );
593: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
594: push (@Resource,
595: { symb => $res->symb,
596: part => $part,
597: resource => $res,
598: } );
599: } elsif ($granularity eq 'part') {
600: push (@Resource,
601: { symb => $res->symb,
602: part => $part,
603: resource => $res,
604: } );
605: } elsif ($granularity eq 'response') {
606: my @response_ids = $res->responseIds($part);
607: my @response_types = $res->responseType($part);
608: for (my $i=0;
609: $i<scalar(@response_ids);
610: $i++){
611: my $respid = $response_ids[$i];
612: my $resptype = $response_types[$i];
613: next if ($resptype !~ m/$AcceptableResponseTypes/);
614: push (@Resource,
615: { symb => $res->symb,
616: part => $part,
617: respid => $respid,
618: resptype => $resptype,
619: resource => $res,
620: } );
621: }
622: }
623: }
624: }
625: }
626: #
627: # Get the index of the current situation
628: my $curr_idx;
629: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
630: my $curr_item = $Resource[$curr_idx];
631: if ($granularity =~ /^(part|part_survey|part_task)$/) {
632: if ($curr_item->{'symb'} eq $target->{'symb'} &&
633: $curr_item->{'part'} eq $target->{'part'}) {
634: last;
635: }
636: } elsif ($granularity eq 'response') {
637: if ($curr_item->{'symb'} eq $target->{'symb'} &&
638: $curr_item->{'part'} eq $target->{'part'} &&
639: $curr_item->{'respid'} eq $target->{'respid'} &&
640: $curr_item->{'resptype'} eq $target->{'resptype'}) {
641: last;
642: }
643: }
644: }
645: my $curr_item = $Resource[$curr_idx];
646: if ($granularity =~ /^(part|part_survey|part_task)$/) {
647: if ($curr_item->{'symb'} ne $target->{'symb'} ||
648: $curr_item->{'part'} ne $target->{'part'}) {
649: # bogus symb - return nothing
650: return (undef,undef,undef);
651: }
652: } elsif ($granularity eq 'response') {
653: if ($curr_item->{'symb'} ne $target->{'symb'} ||
654: $curr_item->{'part'} ne $target->{'part'} ||
655: $curr_item->{'respid'} ne $target->{'respid'} ||
656: $curr_item->{'resptype'} ne $target->{'resptype'}){
657: # bogus symb - return nothing
658: return (undef,undef,undef);
659: }
660: }
661: #
662: # Now just pick up the data we need
663: my ($prev,$curr,$next);
664: if ($curr_idx == 0) {
665: $prev = undef;
666: $curr = $Resource[$curr_idx ];
667: $next = $Resource[$curr_idx+1];
668: } elsif ($curr_idx == $#Resource) {
669: $prev = $Resource[$curr_idx-1];
670: $curr = $Resource[$curr_idx ];
671: $next = undef;
672: } else {
673: $prev = $Resource[$curr_idx-1];
674: $curr = $Resource[$curr_idx ];
675: $next = $Resource[$curr_idx+1];
676: }
677: return ($navmap,$prev,$curr,$next);
678: }
679:
680:
681: #####################################################
682: #####################################################
683:
684: =pod
685:
686: =item GetStudentAnswers($r,$problem,$Students)
687:
688: Determines the correct answer for a set of students on a given problem.
689: The students answers are stored in the student hashes pointed to by the
690: array @$Students under the key 'answer'.
691:
692: Inputs: $r
693: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
694: $Students: reference to array containing student hashes (need 'username',
695: 'domain').
696:
697: Returns: nothing
698:
699: =cut
700:
701: #####################################################
702: #####################################################
703: sub GetStudentAnswers {
704: my ($r,$problem,$Students,$formname,$inputname) = @_;
705: my %answers;
706: my $status_type;
707: if (defined($formname)) {
708: $status_type = 'inline';
709: } else {
710: $status_type = 'popup';
711: }
712: my $c = $r->connection();
713: my %Answers;
714: my ($resource,$partid,$respid) = ($problem->{'resource'},
715: $problem->{'part'},
716: $problem->{'respid'});
717: # Read in the cache (if it exists) before we start timing things.
718: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
719: # Open progress window
720: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$Students));
721: $r->rflush();
722: foreach my $student (@$Students) {
723: last if ($c->aborted());
724: my $sname = $student->{'username'};
725: my $sdom = $student->{'domain'};
726: my $answer = &Apache::lonstathelpers::get_student_answer
727: ($resource,$sname,$sdom,$partid,$respid);
728: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
729: 'last student');
730: $answers{$answer}++;
731: $student->{'answer'} = $answer;
732: }
733: &Apache::lonstathelpers::write_analysis_cache();
734: return if ($c->aborted());
735: $r->rflush();
736: # close progress window
737: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
738: return \%answers;
739: }
740:
741: #####################################################
742: #####################################################
743:
744: =pod
745:
746: =item analyze_problem_as_student
747:
748: Analyzes a homework problem for a student
749:
750: Inputs: $resource: a resource object
751: $sname, $sdom, $partid, $respid
752:
753: Returns: the problem analysis hash
754:
755: =cut
756:
757: #####################################################
758: #####################################################
759: sub analyze_problem_as_student {
760: my ($resource,$sname,$sdom) = @_;
761: if (ref($resource) ne 'HASH') {
762: my $res = $resource;
763: $resource = { 'src' => $res->src,
764: 'symb' => $res->symb,
765: 'parts' => $res->parts };
766: foreach my $part (@{$resource->{'parts'}}) {
767: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
768: [$res->responseIds($part)];
769: }
770: }
771: my $url = $resource->{'src'};
772: my $symb = $resource->{'symb'};
773: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
774: if (! defined($analysis)) {
775: my $courseid = $env{'request.course.id'};
776: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
777: 'grade_domain' => $sdom,
778: 'grade_username' => $sname,
779: 'grade_symb' => $symb,
780: 'grade_courseid' => $courseid));
781: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
782: &store_analysis($sname,$sdom,$symb,$analysis);
783: }
784: my %Answer=&Apache::lonnet::str2hash($analysis);
785: #
786: return \%Answer;
787: }
788:
789: #####################################################
790: #####################################################
791:
792: =pod
793:
794: =item get_student_answer
795:
796: Analyzes a homework problem for a particular student and returns the correct
797: answer. Attempts to put together an answer for problem types
798: that do not natively support it.
799:
800: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
801: $sname, $sdom, $partid, $respid
802:
803: Returns: $answer
804:
805: If $partid and $respid are specified, $answer is simply a scalar containing
806: the correct answer for the response.
807:
808: If $partid or $respid are undefined, $answer will be a hash reference with
809: keys $partid.'.'.$respid.'.answer'.
810:
811: =cut
812:
813: #####################################################
814: #####################################################
815: sub get_student_answer {
816: my ($resource,$sname,$sdom,$partid,$respid) = @_;
817: #
818: if (ref($resource) ne 'HASH') {
819: my $res = $resource;
820: $resource = { 'src' => $res->src,
821: 'symb' => $res->symb,
822: 'parts' => $res->parts };
823: foreach my $part (@{$resource->{'parts'}}) {
824: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
825: [$res->responseIds($part)];
826: }
827: }
828: #
829: my $analysis =
830: &analyze_problem_as_student($resource,$sname,$sdom);
831: my $answer;
832: foreach my $partid (@{$resource->{'parts'}}) {
833: my $partdata = $resource->{'partdata'}->{$partid};
834: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
835: my $prefix = $partid.'.'.$respid;
836: my $key = $prefix.'.answer';
837: $answer->{$partid}->{$respid} =
838: &get_answer($prefix,$key,%$analysis);
839: }
840: }
841: my $returnvalue;
842: if (! defined($partid)) {
843: $returnvalue = $answer;
844: } elsif (! defined($respid)) {
845: $returnvalue = $answer->{$partid};
846: } else {
847: $returnvalue = $answer->{$partid}->{$respid};
848: }
849: return $returnvalue;
850: }
851:
852: sub get_answer {
853: my ($prefix,$key,%Answer) = @_;
854: my $returnvalue;
855: if (exists($Answer{$key})) {
856: if (ref($Answer{$key}) eq 'HASH') {
857: my $which = 'INTERNAL';
858: if (!exists($Answer{$key}{$which})) {
859: $which = (sort(keys(%{ $Answer{$key} })))[0];
860: }
861: my $student_answer = $Answer{$key}{$which}[0][0];
862: $returnvalue = $student_answer;
863: } else {
864: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
865: }
866: } else {
867: if (exists($Answer{$prefix.'.shown'})) {
868: # The response has foils
869: my %values;
870: while (my ($k,$v) = each(%Answer)) {
871: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
872: my $foilname = $2;
873: $values{$foilname}=$v;
874: }
875: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
876: if (ref($values{$foil}) eq 'ARRAY') {
877: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
878: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
879: } else {
880: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
881: &HTML::Entities::encode($values{$foil},'<>&"').'&';
882: }
883: }
884: $returnvalue =~ s/ /\%20/g;
885: chop ($returnvalue);
886: }
887: }
888: return $returnvalue;
889: }
890:
891: #####################################################
892: #####################################################
893:
894: =pod
895:
896: =item Caching routines
897:
898: =over 4
899:
900: =item &load_analysis_cache($symb)
901:
902: Loads the cache for the given symb into memory from disk.
903: Requires the cache filename be set.
904: Only should be called by &ensure_proper_cache.
905:
906: =cut
907:
908: #####################################################
909: #####################################################
910: {
911: my $cache_filename = undef;
912: my $current_symb = undef;
913: my %cache;
914:
915: sub load_analysis_cache {
916: my ($symb) = @_;
917: return if (! defined($cache_filename));
918: if (! defined($current_symb) || $current_symb ne $symb) {
919: undef(%cache);
920: my $storedstring;
921: my %cache_db;
922: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
923: $storedstring = $cache_db{&escape($symb)};
924: untie(%cache_db);
925: }
926: if (defined($storedstring)) {
927: %cache = %{thaw($storedstring)};
928: }
929: }
930: return;
931: }
932:
933: #####################################################
934: #####################################################
935:
936: =pod
937:
938: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
939:
940: Returns the appropriate data from the cache, or undef if no data exists.
941:
942: =cut
943:
944: #####################################################
945: #####################################################
946: sub get_from_analysis_cache {
947: my ($sname,$sdom,$symb) = @_;
948: &ensure_proper_cache($symb);
949: my $returnvalue;
950: if (exists($cache{$sname.':'.$sdom})) {
951: $returnvalue = $cache{$sname.':'.$sdom};
952: } else {
953: $returnvalue = undef;
954: }
955: return $returnvalue;
956: }
957:
958: #####################################################
959: #####################################################
960:
961: =pod
962:
963: =item &write_analysis_cache($symb)
964:
965: Writes the in memory cache to disk so that it can be read in with
966: &load_analysis_cache($symb).
967:
968: =cut
969:
970: #####################################################
971: #####################################################
972: sub write_analysis_cache {
973: return if (! defined($current_symb) || ! defined($cache_filename));
974: my %cache_db;
975: my $key = &escape($current_symb);
976: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
977: my $storestring = freeze(\%cache);
978: $cache_db{$key}=$storestring;
979: $cache_db{$key.'.time'}=time;
980: untie(%cache_db);
981: }
982: undef(%cache);
983: undef($current_symb);
984: undef($cache_filename);
985: return;
986: }
987:
988: #####################################################
989: #####################################################
990:
991: =pod
992:
993: =item &ensure_proper_cache($symb)
994:
995: Called to make sure we have the proper cache set up. This is called
996: prior to every analysis lookup.
997:
998: =cut
999:
1000: #####################################################
1001: #####################################################
1002: sub ensure_proper_cache {
1003: my ($symb) = @_;
1004: my $cid = $env{'request.course.id'};
1005: my $new_filename = LONCAPA::tempdir() .
1006: 'problemanalysis_'.$cid.'_analysis_cache.db';
1007: if (! defined($cache_filename) ||
1008: $cache_filename ne $new_filename ||
1009: ! defined($current_symb) ||
1010: $current_symb ne $symb) {
1011: $cache_filename = $new_filename;
1012: # Notice: $current_symb is not set to $symb until after the cache is
1013: # loaded. This is what tells &load_analysis_cache to load in a new
1014: # symb cache.
1015: &load_analysis_cache($symb);
1016: $current_symb = $symb;
1017: }
1018: }
1019:
1020: #####################################################
1021: #####################################################
1022:
1023: =pod
1024:
1025: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1026:
1027: Stores the analysis data in the in memory cache.
1028:
1029: =cut
1030:
1031: #####################################################
1032: #####################################################
1033: sub store_analysis {
1034: my ($sname,$sdom,$symb,$dataset) = @_;
1035: return if ($symb ne $current_symb);
1036: $cache{$sname.':'.$sdom}=$dataset;
1037: return;
1038: }
1039:
1040: }
1041: #####################################################
1042: #####################################################
1043:
1044: =pod
1045:
1046: =back
1047:
1048: =cut
1049:
1050: #####################################################
1051: #####################################################
1052:
1053: ##
1054: ## The following is copied from datecalc1.pl, part of the
1055: ## Spreadsheet::WriteExcel CPAN module.
1056: ##
1057: ##
1058: ######################################################################
1059: #
1060: # Demonstration of writing date/time cells to Excel spreadsheets,
1061: # using UNIX/Perl time as source of date/time.
1062: #
1063: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1064: #
1065: ######################################################################
1066: #
1067: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1068: # measured in seconds.
1069: #
1070: # An Excel file can use exactly one of two different date/time systems.
1071: # In these systems, a floating point number represents the number of days
1072: # (and fractional parts of the day) since a start point. The floating point
1073: # number is referred to as a 'serial'.
1074: # The two systems ('1900' and '1904') use different starting points:
1075: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1076: # a leap year - see:
1077: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1078: # for the excuse^H^H^H^H^H^Hreason.
1079: # '1904'; '1.00' is 2 Jan 1904.
1080: #
1081: # The '1904' system is the default for Apple Macs. Windows versions of
1082: # Excel have the option to use the '1904' system.
1083: #
1084: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1085: # regard 1900 as a leap year, and thus its serials do not agree with
1086: # the 1900 serials of Excel for dates before 1 Mar 1900.
1087: #
1088: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1089: # regard 1900 as a leap year, and thus its serials do not agree with
1090: # the 1900 serials of Excel for dates before 1 Mar 1900.
1091: #
1092: ######################################################################
1093: #
1094: # Calculation description
1095: # =======================
1096: #
1097: # 1900 system
1098: # -----------
1099: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1100: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1101: # were leap years with an extra day.
1102: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1103: # 1 Jan 1970.
1104: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1105: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1106: #
1107: # 1904 system
1108: # -----------
1109: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1110: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1111: # were leap years with an extra day.
1112: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1113: # 1 Jan 1970.
1114: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1115: #
1116: ######################################################################
1117: #
1118: # Copyright (c) 2000, Andrew Benham.
1119: # This program is free software. It may be used, redistributed and/or
1120: # modified under the same terms as Perl itself.
1121: #
1122: # Andrew Benham, adsb@bigfoot.com
1123: # London, United Kingdom
1124: # 11 Nov 2000
1125: #
1126: ######################################################################
1127: #-----------------------------------------------------------
1128: # calc_serial()
1129: #
1130: # Called with (up to) 2 parameters.
1131: # 1. Unix timestamp. If omitted, uses current time.
1132: # 2. GMT flag. Set to '1' to return serial in GMT.
1133: # If omitted, returns serial in appropriate timezone.
1134: #
1135: # Returns date/time serial according to $DATE_SYSTEM selected
1136: #-----------------------------------------------------------
1137: sub calc_serial {
1138: # Use 1900 date system on all platforms other than Apple Mac (for which
1139: # use 1904 date system).
1140: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1141: my $time = (defined $_[0]) ? $_[0] : time();
1142: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1143: #
1144: # Divide timestamp by number of seconds in a day.
1145: # This gives a date serial with '0' on 1 Jan 1970.
1146: my $serial = $time / 86400;
1147: #
1148: # Adjust the date serial by the offset appropriate to the
1149: # currently selected system (1900/1904).
1150: if ($DATE_SYSTEM == 0) { # use 1900 system
1151: $serial += 25569;
1152: } else { # use 1904 system
1153: $serial += 24107;
1154: }
1155: #
1156: unless ($gmtflag) {
1157: # Now have a 'raw' serial with the right offset. But this
1158: # gives a serial in GMT, which is false unless the timezone
1159: # is GMT. We need to adjust the serial by the appropriate
1160: # timezone offset.
1161: # Calculate the appropriate timezone offset by seeing what
1162: # the differences between localtime and gmtime for the given
1163: # time are.
1164: #
1165: my @gmtime = gmtime($time);
1166: my @ltime = localtime($time);
1167: #
1168: # For the first 7 elements of the two arrays, adjust the
1169: # date serial where the elements differ.
1170: for (0 .. 6) {
1171: my $diff = $ltime[$_] - $gmtime[$_];
1172: if ($diff) {
1173: $serial += _adjustment($diff,$_);
1174: }
1175: }
1176: }
1177: #
1178: # Perpetuate the error that 1900 was a leap year by decrementing
1179: # the serial if we're using the 1900 system and the date is prior to
1180: # 1 Mar 1900. This has the effect of making serial value '60'
1181: # 29 Feb 1900.
1182: #
1183: # This fix only has any effect if UNIX/Perl time on the platform
1184: # can represent 1900. Many can't.
1185: #
1186: unless ($DATE_SYSTEM) {
1187: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1188: }
1189: return $serial;
1190: }
1191:
1192: sub _adjustment {
1193: # Based on the difference in the localtime/gmtime array elements
1194: # number, return the adjustment required to the serial.
1195: #
1196: # We only look at some elements of the localtime/gmtime arrays:
1197: # seconds unlikely to be different as all known timezones
1198: # have an offset of integral multiples of 15 minutes,
1199: # but it's easy to do.
1200: # minutes will be different for timezone offsets which are
1201: # not an exact number of hours.
1202: # hours very likely to be different.
1203: # weekday will differ when localtime/gmtime difference
1204: # straddles midnight.
1205: #
1206: # Assume that difference between localtime and gmtime is less than
1207: # 5 days, then don't have to do maths for day of month, month number,
1208: # year number, etc...
1209: #
1210: my ($delta,$element) = @_;
1211: my $adjust = 0;
1212: #
1213: if ($element == 0) { # Seconds
1214: $adjust = $delta/86400; # 60 * 60 * 24
1215: } elsif ($element == 1) { # Minutes
1216: $adjust = $delta/1440; # 60 * 24
1217: } elsif ($element == 2) { # Hours
1218: $adjust = $delta/24; # 24
1219: } elsif ($element == 6) { # Day of week number
1220: # Catch difference straddling Sat/Sun in either direction
1221: $delta += 7 if ($delta < -4);
1222: $delta -= 7 if ($delta > 4);
1223: #
1224: $adjust = $delta;
1225: }
1226: return $adjust;
1227: }
1228:
1229: ###########################################################
1230: ###########################################################
1231:
1232: =pod
1233:
1234: =item get_problem_data
1235:
1236: Returns a data structure describing the problem.
1237:
1238: Inputs: $url
1239:
1240: Returns: %Partdata
1241:
1242: =cut
1243:
1244: ## note: we must force each foil and option to not begin or end with
1245: ## spaces as they are stored without such data.
1246: ##
1247: ###########################################################
1248: ###########################################################
1249: sub get_problem_data {
1250: my ($url) = @_;
1251: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1252: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1253: my %Answer;
1254: %Answer=&Apache::lonnet::str2hash($Answ);
1255: my %Partdata;
1256: foreach my $part (@{$Answer{'parts'}}) {
1257: while (my($key,$value) = each(%Answer)) {
1258: #
1259: # Logging code:
1260: if (0) {
1261: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1262: if (ref($value) eq 'ARRAY') {
1263: &Apache::lonnet::logthis(' @'.join(',',@$value));
1264: } else {
1265: &Apache::lonnet::logthis(' '.$value);
1266: }
1267: }
1268: # End of logging code
1269: next if ($key !~ /^\Q$part\E/);
1270: $key =~ s/^\Q$part\E\.//;
1271: if (ref($value) eq 'ARRAY') {
1272: if ($key eq 'options') {
1273: $Partdata{$part}->{'_Options'}=$value;
1274: } elsif ($key eq 'concepts') {
1275: $Partdata{$part}->{'_Concepts'}=$value;
1276: } elsif ($key eq 'items') {
1277: $Partdata{$part}->{'_Items'}=$value;
1278: } elsif ($key =~ /^concept\.(.*)$/) {
1279: my $concept = $1;
1280: foreach my $foil (@$value) {
1281: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1282: $concept;
1283: }
1284: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1285: $Partdata{$part}->{$key}=$value;
1286: }
1287: } else {
1288: if ($key=~ /^foil\.text\.(.*)$/) {
1289: my $foil = $1;
1290: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1291: $value =~ s/(\s*$|^\s*)//g;
1292: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1293: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1294: my $foil = $1;
1295: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1296: } elsif ($key eq 'answercomputed') {
1297: $Partdata{$part}->{'answercomputed'} = $value;
1298: }
1299: }
1300: }
1301: }
1302: # Further debugging code
1303: if (0) {
1304: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1305: &log_hash_ref(\%Partdata);
1306: }
1307: return %Partdata;
1308: }
1309:
1310: sub log_array_ref {
1311: my ($arrayref,$prefix) = @_;
1312: return if (ref($arrayref) ne 'ARRAY');
1313: if (! defined($prefix)) { $prefix = ''; };
1314: foreach my $v (@$arrayref) {
1315: if (ref($v) eq 'ARRAY') {
1316: &log_array_ref($v,$prefix.' ');
1317: } elsif (ref($v) eq 'HASH') {
1318: &log_hash_ref($v,$prefix.' ');
1319: } else {
1320: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1321: }
1322: }
1323: }
1324:
1325: sub log_hash_ref {
1326: my ($hashref,$prefix) = @_;
1327: return if (ref($hashref) ne 'HASH');
1328: if (! defined($prefix)) { $prefix = ''; };
1329: while (my ($k,$v) = each(%$hashref)) {
1330: if (ref($v) eq 'ARRAY') {
1331: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1332: &log_array_ref($v,$prefix.' ');
1333: } elsif (ref($v) eq 'HASH') {
1334: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1335: &log_hash_ref($v,$prefix.' ');
1336: } else {
1337: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1338: }
1339: }
1340: }
1341: ####################################################
1342: ####################################################
1343:
1344: =pod
1345:
1346: =item &limit_by_time()
1347:
1348: =cut
1349:
1350: ####################################################
1351: ####################################################
1352: sub limit_by_time_form {
1353: my $Starttime_form = '';
1354: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1355: ('limitby_startdate');
1356: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1357: ('limitby_enddate');
1358: if (! defined($endtime)) {
1359: $endtime = time;
1360: }
1361: if (! defined($starttime)) {
1362: $starttime = $endtime - 60*60*24*7;
1363: }
1364: my $state;
1365: if (&limit_by_time()) {
1366: $state = '';
1367: } else {
1368: $state = 'disabled';
1369: }
1370: my $startdateform = &Apache::lonhtmlcommon::date_setter
1371: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1372: my $enddateform = &Apache::lonhtmlcommon::date_setter
1373: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1374: my $Str;
1375: $Str .= '<script type="text/javascript" language="JavaScript">';
1376: $Str .= 'function toggle_limitby_activity(state) {';
1377: $Str .= ' if (state) {';
1378: $Str .= ' limitby_startdate_enable();';
1379: $Str .= ' limitby_enddate_enable();';
1380: $Str .= ' } else {';
1381: $Str .= ' limitby_startdate_disable();';
1382: $Str .= ' limitby_enddate_disable();';
1383: $Str .= ' }';
1384: $Str .= '}';
1385: $Str .= '</script>';
1386: $Str .= '<fieldset>';
1387: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1388: if (&limit_by_time()) {
1389: $timecheckbox .= 'checked="checked" ';
1390: }
1391: $timecheckbox .= 'onchange="javascript:toggle_limitby_activity(this.checked);" ';
1392: $timecheckbox .= ' />';
1393: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1394: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1395: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1396: $Str .= '</fieldset>';
1397: return $Str;
1398: }
1399:
1400: sub limit_by_time {
1401: if (exists($env{'form.limit_by_time'}) &&
1402: $env{'form.limit_by_time'} ne '' ) {
1403: return 1;
1404: } else {
1405: return 0;
1406: }
1407: }
1408:
1409: sub get_time_limits {
1410: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1411: ('limitby_startdate');
1412: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1413: ('limitby_enddate');
1414: return ($starttime,$endtime);
1415: }
1416:
1417: ####################################################
1418: ####################################################
1419:
1420: =pod
1421:
1422: =item &manage_caches
1423:
1424: Inputs: $r, apache request object
1425:
1426: Returns: An array of scalars containing html for buttons.
1427:
1428: =cut
1429:
1430: ####################################################
1431: ####################################################
1432: sub manage_caches {
1433: my ($r,$formname,$inputname,$update_message) = @_;
1434: &Apache::loncoursedata::clear_internal_caches();
1435: my $sectionkey =
1436: join(',',
1437: map {
1438: &escape($_);
1439: } sort(&Apache::lonstatistics::get_selected_sections())
1440: );
1441: my $statuskey = $Apache::lonstatistics::enrollment_status;
1442: if (exists($env{'form.ClearCache'}) ||
1443: exists($env{'form.updatecaches'}) ||
1444: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1445: (exists($env{'form.prevsection'}) &&
1446: $env{'form.prevsection'} ne $sectionkey) ||
1447: (exists($env{'form.prevenrollstatus'}) &&
1448: $env{'form.prevenrollstatus'} ne $statuskey)
1449: ) {
1450: if (defined($update_message)) {
1451: $r->print($update_message);
1452: }
1453: if (0) {
1454: &Apache::lonnet::logthis('Updating mysql student data caches');
1455: }
1456: &gather_full_student_data($r,$formname,$inputname);
1457: }
1458: #
1459: my @Buttons =
1460: ('<input type="submit" name="ClearCache" '.
1461: 'value="'.&mt('Clear Caches').'" />',
1462: '<input type="submit" name="updatecaches" '.
1463: 'value="'.&mt('Update Caches').'" />'.
1464: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1465: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1466: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1467: );
1468: #
1469: if (! exists($env{'form.firstrun'})) {
1470: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1471: } else {
1472: $r->print('<input type="hidden" name="firstrun" value="no" />');
1473: }
1474: #
1475: return @Buttons;
1476: }
1477:
1478: sub gather_full_student_data {
1479: my ($r,$formname,$inputname) = @_;
1480: my $status_type;
1481: if (defined($formname)) {
1482: $status_type = 'inline';
1483: } else {
1484: $status_type = 'popup';
1485: }
1486: my $c = $r->connection();
1487: #
1488: &Apache::loncoursedata::clear_internal_caches();
1489: #
1490: my @Students = @Apache::lonstatistics::Students;
1491: #
1492: # Open the progress window
1493: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@Students));
1494: #
1495: while (my $student = shift @Students) {
1496: return if ($c->aborted());
1497: my $status = &Apache::loncoursedata::ensure_current_full_data
1498: ($student->{'username'},$student->{'domain'},
1499: $env{'request.course.id'});
1500: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1501: &mt('last student'));
1502: }
1503: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1504: $r->rflush();
1505: return;
1506: }
1507:
1508: ####################################################
1509: ####################################################
1510:
1511: =pod
1512:
1513: =item &submission_report_form
1514:
1515: Input: The originating reportSelected value for the current stats page.
1516:
1517: Output: Scalar containing HTML with needed form elements and a link to
1518: the student submission reports page.
1519:
1520: =cut
1521:
1522: ####################################################
1523: ####################################################
1524: sub submission_report_form {
1525: my ($original_report) = @_;
1526: # Note: In the link below we change the reportSelected value. If
1527: # the user hits the 'back' button on the browser after getting their
1528: # student submissions report, this value may still be around. So we
1529: # output a script block to set it properly. If the $original_report
1530: # value is unset, you are just asking for trouble.
1531: if (! defined($original_report)) {
1532: &Apache::lonnet::logthis
1533: ('someone called lonstathelpers::submission_report_form without '.
1534: ' enough input.');
1535: }
1536: my $html = $/.
1537: '<script type="text/javascript" language="JavaScript">'.
1538: "document.Statistics.reportSelected.value='$original_report';".
1539: '</script>'.
1540: '<input type="hidden" name="correctans" value="true" />'.
1541: '<input type="hidden" name="prob_status" value="true" />'.
1542: '<input type="hidden" name="all_sub" value="true" />';
1543: my $output_selector = $/.'<select name="output">'.$/;
1544: foreach ('HTML','Excel','CSV') {
1545: $output_selector .= ' <option value="'.lc($_).'"';
1546: if ($env{'form.output'} eq lc($_)) {
1547: $output_selector .= ' selected ';
1548: }
1549: $output_selector .='>'.&mt($_).'</option>'.$/;
1550: }
1551: $output_selector .= '</select>'.$/;
1552: my $link = '<a href="javascript:'.
1553: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1554: 'document.Statistics.submit();">';
1555: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1556: $link,'</a>').$/;
1557: return $html
1558: }
1559:
1560: ####################################################
1561: ####################################################
1562:
1563: =pod
1564:
1565: =back
1566:
1567: =cut
1568:
1569: ####################################################
1570: ####################################################
1571:
1572: 1;
1573:
1574: __END__
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