1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.63 2010/08/04 01:56:07 raeburn Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ####################################################
28: ####################################################
29:
30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonstathelpers - helper routines used by statistics
35:
36: =head1 SYNOPSIS
37:
38: This module provides a place to consolidate much of the statistics
39: routines that are needed across multiple statistics functions.
40:
41: =head1 OVERVIEW
42:
43: =over 4
44:
45: =cut
46:
47: ####################################################
48: ####################################################
49: package Apache::lonstathelpers;
50:
51: use strict;
52: use Apache::lonnet;
53: use Apache::loncommon();
54: use Apache::lonhtmlcommon();
55: use Apache::loncoursedata();
56: use Apache::lonstatistics;
57: use Apache::lonlocal;
58: use HTML::Entities();
59: use Time::Local();
60: use Spreadsheet::WriteExcel();
61: use GDBM_File;
62: use Storable qw(freeze thaw);
63: use lib '/home/httpd/lib/perl/';
64: use LONCAPA;
65:
66:
67: ####################################################
68: ####################################################
69:
70: =pod
71:
72: =item &render_resource($resource)
73:
74: Input: a navmaps resource
75:
76: Retunrs: a scalar containing html for a rendering of the problem
77: within a table.
78:
79: =cut
80:
81: ####################################################
82: ####################################################
83: sub render_resource {
84: my ($resource) = @_;
85: ##
86: ## Render the problem
87: my ($base) = ($resource->src =~ m|^(.*/)[^/]*$|);
88: $base="http://".$ENV{'SERVER_NAME'}.$base;
89: my ($src,$symb)=($resource->link,&escape($resource->shown_symb));
90: my $rendered_problem = &Apache::lonnet::ssi_body($src.'?symb='.$symb);
91: $rendered_problem =~ s/<\s*form\s*/<nop /g;
92: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
93: return '<table bgcolor="ffffff"><tr><td>'.
94: '<base href="'.$base.'" />'.
95: $rendered_problem.
96: '</td></tr></table>';
97: }
98:
99: ####################################################
100: ####################################################
101:
102: =pod
103:
104: =item &get_resources
105:
106: =cut
107:
108: ####################################################
109: ####################################################
110: sub get_resources {
111: my ($navmap,$sequence) = @_;
112: my @resources = $navmap->retrieveResources($sequence,
113: sub { shift->is_problem(); },
114: 0,0,0);
115: return @resources;
116: }
117:
118: ####################################################
119: ####################################################
120:
121: =pod
122:
123: =item &problem_selector($AcceptedResponseTypes)
124:
125: Input: scalar containing regular expression which matches response
126: types to show. '.' will yield all, '(option|radiobutton)' will match
127: all option response and radiobutton problems.
128:
129: Returns: A string containing html for a table which lists the sequences
130: and their contents. A radiobutton is provided for each problem.
131: Skips 'survey' problems.
132:
133: =cut
134:
135: ####################################################
136: ####################################################
137: sub problem_selector {
138: my ($AcceptedResponseTypes,$sequence_addendum,$symbmode) = @_;
139: my $Str;
140: $Str = &Apache::loncommon::start_data_table();
141: my $rb_count =0;
142: my ($navmap,@sequences) =
143: &Apache::lonstatistics::selected_sequences_with_assessments('all');
144: return $navmap if (! ref($navmap)); # error
145: foreach my $seq (@sequences) {
146: my $seq_str = '';
147: foreach my $res (&get_resources($navmap,$seq)) {
148: foreach my $part (@{$res->parts}) {
149: my @response_ids = $res->responseIds($part);
150: my @response_types = $res->responseType($part);
151: for (my $i=0;$i<scalar(@response_types);$i++){
152: my $respid = $response_ids[$i];
153: my $resptype = $response_types[$i];
154: if ($resptype =~ m/$AcceptedResponseTypes/) {
155: my $value = &make_target_id({symb=>$res->symb,
156: part=>$part,
157: respid=>$respid,
158: resptype=>$resptype});
159: my $checked = '';
160: if ($env{'form.problemchoice'} eq $value) {
161: $checked = ' checked="checked"';
162: }
163: my $title = $res->compTitle;
164: if (! defined($title) || $title eq '') {
165: ($title) = ($res->src =~ m:/([^/]*)$:);
166: }
167: $seq_str .= &Apache::loncommon::start_data_table_row().
168: ($symbmode?
169: '<td><input type="radio" id="'.$rb_count.'" name="symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' /></td>'
170: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
171: '<td><label for="'.$rb_count.'">'.$resptype.'</label></td>'.
172: '<td><label for="'.$rb_count.'">'.$title.'</label>';
173: if (scalar(@response_ids) > 1) {
174: $seq_str .= &mt('response').' '.$respid;
175: }
176: my $link = $res->link.'?symb='.&escape($res->shown_symb);
177: $seq_str .= (' 'x2).
178: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
179: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
180: $rb_count++;
181: }
182: }
183: }
184: }
185: if ($seq_str ne '') {
186: $Str .= &Apache::loncommon::start_data_table_header_row().
187: '<th colspan="3">'.$seq->compTitle.'</th>'.
188: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
189: if (defined($sequence_addendum)) {
190: $Str .= &Apache::loncommon::start_data_table_header_row().
191: ('<td> </td>'x2).
192: '<td align="right">'.$sequence_addendum.'</td>'.
193: &Apache::loncommon::end_data_table_header_row()."\n";
194: }
195: }
196: }
197: $Str .= &Apache::loncommon::end_data_table()."\n";
198: return $Str;
199: }
200:
201: ####################################################
202: ####################################################
203:
204: =pod
205:
206: =item &MultipleProblemSelector($navmap,$selected,$inputname)
207:
208: Generate HTML with checkboxes for problem selection.
209:
210: Input:
211:
212: $navmap: a navmap object. If undef, navmaps will be called to create a
213: new object.
214:
215: $selected: Scalar, Array, or hash reference of currently selected items.
216:
217: $inputname: The name of the form elements to use for the checkboxs.
218:
219: Returns: A string containing html for a table which lists the sequences
220: and their contents. A checkbox is provided for each problem.
221:
222: =cut
223:
224: ####################################################
225: ####################################################
226: sub MultipleProblemSelector {
227: my ($navmap,$inputname,$formname,$anoncounter)=@_;
228: my $cid = $env{'request.course.id'};
229: my $Str;
230: # Massage the input as needed.
231: if (! defined($navmap)) {
232: $navmap = Apache::lonnavmaps::navmap->new();
233: if (! defined($navmap)) {
234: $Str .= '<div class="LC_error">'
235: .&mt('Error: cannot process course structure')
236: .'</div>';
237: return $Str;
238: }
239: }
240: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
241: # Header
242: $Str .= <<"END";
243: <script type="text/javascript" language="JavaScript">
244: function checkall(value,seqid) {
245: for (i=0; i<document.forms.$formname.elements.length; i++) {
246: ele = document.forms.$formname.elements[i];
247: if (ele.name == '$inputname') {
248: if (seqid != null) {
249: itemid = document.forms.$formname.elements[i].id;
250: thing = itemid.split(':');
251: if (thing[0] == seqid) {
252: document.forms.$formname.elements[i].checked=value;
253: }
254: } else {
255: document.forms.$formname.elements[i].checked=value;
256: }
257: }
258: }
259: }
260: </script>
261: END
262: my $checkanonjs = <<"END";
263:
264: <script type="text/javascript" language="JavaScript">
265: function checkanon() {
266: return true;
267: }
268: </script>
269:
270: END
271: if (ref($anoncounter) eq 'HASH') {
272: if (keys(%{$anoncounter}) > 0) {
273: 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');
274: $checkanonjs = <<"END";
275:
276: <script type="text/javascript" language="JavaScript">
277: function checkanon() {
278: anoncount = 0;
279: namedcount = 0;
280: for (i=0; i<document.forms.$formname.elements.length; i++) {
281: ele = document.forms.$formname.elements[i];
282: if (ele.name == '$inputname') {
283: itemid = document.forms.$formname.elements[i].id;
284: if (document.forms.$formname.elements[i].checked) {
285: anonid = 'anonymous_'+itemid;
286: mixid = 'mixed_'+itemid;
287: anonele = document.getElementById(anonid);
288: mixele = document.getElementById(mixid);
289: if (anonele.value > 0) {
290: if (mixele.value == 'none') {
291: anoncount ++;
292: } else {
293: if (mixele.value == '0') {
294: if (mixele.checked) {
295: anoncount ++;
296: } else {
297: namedcount ++;
298: }
299: } else {
300: namedcount ++;
301: }
302: }
303: } else {
304: namedcount ++;
305: }
306: }
307: }
308: }
309: if (anoncount > 0 && namedcount > 0) {
310: alert("$anonwarning");
311: return false;
312: }
313: }
314: </script>
315:
316: END
317: }
318: }
319: $Str .= $checkanonjs.
320: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
321: (' 'x4).
322: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
323: $Str .= $/.'<table>'.$/;
324: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
325: my $sequence_string;
326: my $seq_id = 0;
327: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
328: '',
329: '',
330: $seq_id++,
331: $inputname));
332: my @Sequence_Data;
333: while (my $curRes = $iterator->next()) {
334: if ($curRes == $iterator->END_MAP) {
335: if (ref($Accumulator[-1]) eq 'CODE') {
336: my $old_accumulator = pop(@Accumulator);
337: push(@Sequence_Data,&{$old_accumulator}());
338: }
339: } elsif ($curRes == $iterator->BEGIN_MAP) {
340: # Not much to do here.
341: }
342: next if (! ref($curRes));
343: if ($curRes->is_map) {
344: push(@Accumulator,&new_accumulator($curRes->compTitle,
345: $curRes->src,
346: $curRes->symb,
347: $seq_id++,
348: $inputname));
349: } elsif ($curRes->is_problem) {
350: my $anonpart = 0;
351: my $namedpart = 0;
352: my @parts = @{$curRes->parts()};
353: if (ref($anoncounter) eq 'HASH') {
354: if (keys(%{$anoncounter}) > 0) {
355: my @parts = @{$curRes->parts()};
356: my $symb = $curRes->symb();
357: foreach my $part (@parts) {
358: if ((exists($anoncounter->{$symb."\0".$part})) ||
359: $curRes->is_anonsurvey($part)) {
360: $anonpart ++;
361: } else {
362: $namedpart ++
363: }
364: }
365: }
366: }
367: if (@Accumulator && $Accumulator[-1] ne '') {
368: &{$Accumulator[-1]}($curRes,
369: exists($selected->{$curRes->symb}),
370: $anonpart,$namedpart);
371: }
372: }
373: }
374: my $course_seq = pop(@Sequence_Data);
375: foreach my $seq ($course_seq,@Sequence_Data) {
376: #my $seq = pop(@Sequence_Data);
377: next if (! defined($seq) || ref($seq) ne 'HASH');
378: $Str.= '<tr><td colspan="2">'.
379: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
380: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
381: &mt('Select').'</a>'.(' 'x2).
382: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
383: &mt('Unselect').'</a>'.(' 'x2).
384: '</td></tr>'.$/;
385: $Str.= $seq->{'html'};
386: }
387: $Str .= '</table>'.$/;
388: return $Str;
389: }
390:
391: sub new_accumulator {
392: my ($title,$src,$symb,$seq_id,$inputname) = @_;
393: my $target;
394: my $item_id=0;
395: return
396: sub {
397: if (@_) {
398: my ($res,$checked,$anonpart,$namedpart) = @_;
399: $target.='<tr><td><label>'.
400: '<input type="checkbox" name="'.$inputname.'" ';
401: if ($checked) {
402: $target .= 'checked="checked" ';
403: }
404: my $anon_id = $item_id;
405: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
406: my $esc_symb = &escape($res->symb);
407: $target.=
408: 'value="'.$esc_symb.'" />'.
409: ' '.$res->compTitle.'</label>'.
410: (' 'x2).'<a target="preview" '.
411: 'href="'.$res->link.'?symb='.
412: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
413: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
414: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
415: if ($anonpart) {
416: if ($namedpart) {
417: my $checknamed = '';
418: my $checkedanon = ' checked="checked"';
419: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
420: $checknamed = $checkedanon;
421: $checkedanon = '';
422: }
423: $mixed = ' ('.
424: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
425: '<span class="LC_nobreak"><label>'.
426: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
427: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
428: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
429: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
430: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
431: '</label></span>').')';
432: } else {
433: $target .= ' '.&mt('(Anonymous Survey)');
434: }
435: }
436: $target.= $mixed.'</td></tr>'.$/;
437: } else {
438: if (defined($target)) {
439: return { title => $title,
440: symb => $symb,
441: src => $src,
442: id => $seq_id,
443: html => $target, };
444: }
445: return undef;
446: }
447: };
448: }
449:
450: sub get_selected_symbs {
451: my ($inputfield) = @_;
452: my $field = 'form.'.$inputfield;
453: my @symbs = (map {
454: &unescape($_);
455: } &Apache::loncommon::get_env_multiple($field));
456: return @symbs;
457: }
458:
459: ####################################################
460: ####################################################
461:
462: =pod
463:
464: =item &make_target_id($target)
465:
466: Inputs: Hash ref with the following entries:
467: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
468: $target->{'resptype'}.
469:
470: Returns: A string, suitable for a form parameter, which uniquely identifies
471: the problem, part, and response to do statistical analysis on.
472:
473: Used by Apache::lonstathelpers::ProblemSelector().
474:
475: =cut
476:
477: ####################################################
478: ####################################################
479: sub make_target_id {
480: my ($target) = @_;
481: my $id = &escape($target->{'symb'}).':'.
482: &escape($target->{'part'}).':'.
483: &escape($target->{'respid'}).':'.
484: &escape($target->{'resptype'});
485: return $id;
486: }
487:
488: ####################################################
489: ####################################################
490:
491: =pod
492:
493: =item &get_target_from_id($id)
494:
495: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
496:
497: Returns: A hash reference, $target, containing the following keys:
498: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
499: $target->{'resptype'}.
500:
501: =cut
502:
503: ####################################################
504: ####################################################
505: sub get_target_from_id {
506: my ($id) = @_;
507: if (! ref($id)) {
508: my ($symb,$part,$respid,$resptype) = split(':',$id);
509: return ({ symb => &unescape($symb),
510: part => &unescape($part),
511: respid => &unescape($respid),
512: resptype => &unescape($resptype)});
513: } elsif (ref($id) eq 'ARRAY') {
514: my @Return;
515: foreach my $selected (@$id) {
516: my ($symb,$part,$respid,$resptype) = split(':',$selected);
517: push(@Return,{ symb => &unescape($symb),
518: part => &unescape($part),
519: respid => &unescape($respid),
520: resptype => &unescape($resptype)});
521: }
522: return \@Return;
523: }
524: }
525:
526: ####################################################
527: ####################################################
528:
529: =pod
530:
531: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
532:
533: Determine the problem parts or responses preceeding and following the
534: current resource.
535:
536: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
537: $AcceptableResponseTypes, regular expression matching acceptable
538: response types,
539: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
540:
541: Returns: three hash references, $prev, $curr, $next, which refer to the
542: preceeding, current, or following problem parts or responses, depending
543: on the value of $granularity. Values of undef indicate there is no
544: previous or next part/response. A value of undef for all three indicates
545: there was no match found to the current part/resource.
546:
547: The hash references contain the following keys:
548: symb, part, resource
549:
550: If $granularity eq 'response', the following ADDITIONAL keys will be present:
551: respid, resptype
552:
553: =cut
554:
555: ####################################################
556: ####################################################
557: sub get_prev_curr_next {
558: my ($target,$AcceptableResponseTypes,$granularity) = @_;
559: #
560: # Build an array with the data we need to search through
561: my @Resource;
562: my ($navmap,@sequences) =
563: &Apache::lonstatistics::selected_sequences_with_assessments('all');
564: return $navmap if (! ref($navmap));
565: foreach my $seq (@sequences) {
566: my @resources = &get_resources($navmap,$seq);
567: foreach my $res (@resources) {
568: foreach my $part (@{$res->parts}) {
569: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
570: ($granularity eq 'part_survey')) {
571: push (@Resource,
572: { symb => $res->symb,
573: part => $part,
574: resource => $res,
575: } );
576: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
577: push (@Resource,
578: { symb => $res->symb,
579: part => $part,
580: resource => $res,
581: } );
582: } elsif ($granularity eq 'part') {
583: push (@Resource,
584: { symb => $res->symb,
585: part => $part,
586: resource => $res,
587: } );
588: } elsif ($granularity eq 'response') {
589: my @response_ids = $res->responseIds($part);
590: my @response_types = $res->responseType($part);
591: for (my $i=0;
592: $i<scalar(@response_ids);
593: $i++){
594: my $respid = $response_ids[$i];
595: my $resptype = $response_types[$i];
596: next if ($resptype !~ m/$AcceptableResponseTypes/);
597: push (@Resource,
598: { symb => $res->symb,
599: part => $part,
600: respid => $respid,
601: resptype => $resptype,
602: resource => $res,
603: } );
604: }
605: }
606: }
607: }
608: }
609: #
610: # Get the index of the current situation
611: my $curr_idx;
612: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
613: my $curr_item = $Resource[$curr_idx];
614: if ($granularity =~ /^(part|part_survey|part_task)$/) {
615: if ($curr_item->{'symb'} eq $target->{'symb'} &&
616: $curr_item->{'part'} eq $target->{'part'}) {
617: last;
618: }
619: } elsif ($granularity eq 'response') {
620: if ($curr_item->{'symb'} eq $target->{'symb'} &&
621: $curr_item->{'part'} eq $target->{'part'} &&
622: $curr_item->{'respid'} eq $target->{'respid'} &&
623: $curr_item->{'resptype'} eq $target->{'resptype'}) {
624: last;
625: }
626: }
627: }
628: my $curr_item = $Resource[$curr_idx];
629: if ($granularity =~ /^(part|part_survey|part_task)$/) {
630: if ($curr_item->{'symb'} ne $target->{'symb'} ||
631: $curr_item->{'part'} ne $target->{'part'}) {
632: # bogus symb - return nothing
633: return (undef,undef,undef);
634: }
635: } elsif ($granularity eq 'response') {
636: if ($curr_item->{'symb'} ne $target->{'symb'} ||
637: $curr_item->{'part'} ne $target->{'part'} ||
638: $curr_item->{'respid'} ne $target->{'respid'} ||
639: $curr_item->{'resptype'} ne $target->{'resptype'}){
640: # bogus symb - return nothing
641: return (undef,undef,undef);
642: }
643: }
644: #
645: # Now just pick up the data we need
646: my ($prev,$curr,$next);
647: if ($curr_idx == 0) {
648: $prev = undef;
649: $curr = $Resource[$curr_idx ];
650: $next = $Resource[$curr_idx+1];
651: } elsif ($curr_idx == $#Resource) {
652: $prev = $Resource[$curr_idx-1];
653: $curr = $Resource[$curr_idx ];
654: $next = undef;
655: } else {
656: $prev = $Resource[$curr_idx-1];
657: $curr = $Resource[$curr_idx ];
658: $next = $Resource[$curr_idx+1];
659: }
660: return ($navmap,$prev,$curr,$next);
661: }
662:
663:
664: #####################################################
665: #####################################################
666:
667: =pod
668:
669: =item GetStudentAnswers($r,$problem,$Students)
670:
671: Determines the correct answer for a set of students on a given problem.
672: The students answers are stored in the student hashes pointed to by the
673: array @$Students under the key 'answer'.
674:
675: Inputs: $r
676: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
677: $Students: reference to array containing student hashes (need 'username',
678: 'domain').
679:
680: Returns: nothing
681:
682: =cut
683:
684: #####################################################
685: #####################################################
686: sub GetStudentAnswers {
687: my ($r,$problem,$Students,$formname,$inputname) = @_;
688: my %answers;
689: my $status_type;
690: if (defined($formname)) {
691: $status_type = 'inline';
692: } else {
693: $status_type = 'popup';
694: }
695: my $c = $r->connection();
696: my %Answers;
697: my ($resource,$partid,$respid) = ($problem->{'resource'},
698: $problem->{'part'},
699: $problem->{'respid'});
700: # Read in the cache (if it exists) before we start timing things.
701: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
702: # Open progress window
703: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
704: ($r,'Student Answer Compilation Status',
705: 'Student Answer Compilation Progress', scalar(@$Students),
706: $status_type,undef,$formname,$inputname);
707: $r->rflush();
708: foreach my $student (@$Students) {
709: last if ($c->aborted());
710: my $sname = $student->{'username'};
711: my $sdom = $student->{'domain'};
712: my $answer = &Apache::lonstathelpers::get_student_answer
713: ($resource,$sname,$sdom,$partid,$respid);
714: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
715: 'last student');
716: $answers{$answer}++;
717: $student->{'answer'} = $answer;
718: }
719: &Apache::lonstathelpers::write_analysis_cache();
720: return if ($c->aborted());
721: $r->rflush();
722: # close progress window
723: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
724: return \%answers;
725: }
726:
727: #####################################################
728: #####################################################
729:
730: =pod
731:
732: =item analyze_problem_as_student
733:
734: Analyzes a homework problem for a student
735:
736: Inputs: $resource: a resource object
737: $sname, $sdom, $partid, $respid
738:
739: Returns: the problem analysis hash
740:
741: =cut
742:
743: #####################################################
744: #####################################################
745: sub analyze_problem_as_student {
746: my ($resource,$sname,$sdom) = @_;
747: if (ref($resource) ne 'HASH') {
748: my $res = $resource;
749: $resource = { 'src' => $res->src,
750: 'symb' => $res->symb,
751: 'parts' => $res->parts };
752: foreach my $part (@{$resource->{'parts'}}) {
753: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
754: [$res->responseIds($part)];
755: }
756: }
757: my $url = $resource->{'src'};
758: my $symb = $resource->{'symb'};
759: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
760: if (! defined($analysis)) {
761: my $courseid = $env{'request.course.id'};
762: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
763: 'grade_domain' => $sdom,
764: 'grade_username' => $sname,
765: 'grade_symb' => $symb,
766: 'grade_courseid' => $courseid));
767: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
768: &store_analysis($sname,$sdom,$symb,$analysis);
769: }
770: my %Answer=&Apache::lonnet::str2hash($analysis);
771: #
772: return \%Answer;
773: }
774:
775: #####################################################
776: #####################################################
777:
778: =pod
779:
780: =item get_student_answer
781:
782: Analyzes a homework problem for a particular student and returns the correct
783: answer. Attempts to put together an answer for problem types
784: that do not natively support it.
785:
786: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
787: $sname, $sdom, $partid, $respid
788:
789: Returns: $answer
790:
791: If $partid and $respid are specified, $answer is simply a scalar containing
792: the correct answer for the response.
793:
794: If $partid or $respid are undefined, $answer will be a hash reference with
795: keys $partid.'.'.$respid.'.answer'.
796:
797: =cut
798:
799: #####################################################
800: #####################################################
801: sub get_student_answer {
802: my ($resource,$sname,$sdom,$partid,$respid) = @_;
803: #
804: if (ref($resource) ne 'HASH') {
805: my $res = $resource;
806: $resource = { 'src' => $res->src,
807: 'symb' => $res->symb,
808: 'parts' => $res->parts };
809: foreach my $part (@{$resource->{'parts'}}) {
810: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
811: [$res->responseIds($part)];
812: }
813: }
814: #
815: my $analysis =
816: &analyze_problem_as_student($resource,$sname,$sdom);
817: my $answer;
818: foreach my $partid (@{$resource->{'parts'}}) {
819: my $partdata = $resource->{'partdata'}->{$partid};
820: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
821: my $prefix = $partid.'.'.$respid;
822: my $key = $prefix.'.answer';
823: $answer->{$partid}->{$respid} =
824: &get_answer($prefix,$key,%$analysis);
825: }
826: }
827: my $returnvalue;
828: if (! defined($partid)) {
829: $returnvalue = $answer;
830: } elsif (! defined($respid)) {
831: $returnvalue = $answer->{$partid};
832: } else {
833: $returnvalue = $answer->{$partid}->{$respid};
834: }
835: return $returnvalue;
836: }
837:
838: sub get_answer {
839: my ($prefix,$key,%Answer) = @_;
840: my $returnvalue;
841: if (exists($Answer{$key})) {
842: if (ref($Answer{$key}) eq 'HASH') {
843: my $which = 'INTERNAL';
844: if (!exists($Answer{$key}{$which})) {
845: $which = (sort(keys(%{ $Answer{$key} })))[0];
846: }
847: my $student_answer = $Answer{$key}{$which}[0][0];
848: $returnvalue = $student_answer;
849: } else {
850: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
851: }
852: } else {
853: if (exists($Answer{$prefix.'.shown'})) {
854: # The response has foils
855: my %values;
856: while (my ($k,$v) = each(%Answer)) {
857: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
858: my $foilname = $2;
859: $values{$foilname}=$v;
860: }
861: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
862: if (ref($values{$foil}) eq 'ARRAY') {
863: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
864: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
865: } else {
866: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
867: &HTML::Entities::encode($values{$foil},'<>&"').'&';
868: }
869: }
870: $returnvalue =~ s/ /\%20/g;
871: chop ($returnvalue);
872: }
873: }
874: return $returnvalue;
875: }
876:
877: #####################################################
878: #####################################################
879:
880: =pod
881:
882: =item Caching routines
883:
884: =over 4
885:
886: =item &load_analysis_cache($symb)
887:
888: Loads the cache for the given symb into memory from disk.
889: Requires the cache filename be set.
890: Only should be called by &ensure_proper_cache.
891:
892: =cut
893:
894: #####################################################
895: #####################################################
896: {
897: my $cache_filename = undef;
898: my $current_symb = undef;
899: my %cache;
900:
901: sub load_analysis_cache {
902: my ($symb) = @_;
903: return if (! defined($cache_filename));
904: if (! defined($current_symb) || $current_symb ne $symb) {
905: undef(%cache);
906: my $storedstring;
907: my %cache_db;
908: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
909: $storedstring = $cache_db{&escape($symb)};
910: untie(%cache_db);
911: }
912: if (defined($storedstring)) {
913: %cache = %{thaw($storedstring)};
914: }
915: }
916: return;
917: }
918:
919: #####################################################
920: #####################################################
921:
922: =pod
923:
924: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
925:
926: Returns the appropriate data from the cache, or undef if no data exists.
927:
928: =cut
929:
930: #####################################################
931: #####################################################
932: sub get_from_analysis_cache {
933: my ($sname,$sdom,$symb) = @_;
934: &ensure_proper_cache($symb);
935: my $returnvalue;
936: if (exists($cache{$sname.':'.$sdom})) {
937: $returnvalue = $cache{$sname.':'.$sdom};
938: } else {
939: $returnvalue = undef;
940: }
941: return $returnvalue;
942: }
943:
944: #####################################################
945: #####################################################
946:
947: =pod
948:
949: =item &write_analysis_cache($symb)
950:
951: Writes the in memory cache to disk so that it can be read in with
952: &load_analysis_cache($symb).
953:
954: =cut
955:
956: #####################################################
957: #####################################################
958: sub write_analysis_cache {
959: return if (! defined($current_symb) || ! defined($cache_filename));
960: my %cache_db;
961: my $key = &escape($current_symb);
962: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
963: my $storestring = freeze(\%cache);
964: $cache_db{$key}=$storestring;
965: $cache_db{$key.'.time'}=time;
966: untie(%cache_db);
967: }
968: undef(%cache);
969: undef($current_symb);
970: undef($cache_filename);
971: return;
972: }
973:
974: #####################################################
975: #####################################################
976:
977: =pod
978:
979: =item &ensure_proper_cache($symb)
980:
981: Called to make sure we have the proper cache set up. This is called
982: prior to every analysis lookup.
983:
984: =cut
985:
986: #####################################################
987: #####################################################
988: sub ensure_proper_cache {
989: my ($symb) = @_;
990: my $cid = $env{'request.course.id'};
991: my $new_filename = '/home/httpd/perl/tmp/'.
992: 'problemanalysis_'.$cid.'_analysis_cache.db';
993: if (! defined($cache_filename) ||
994: $cache_filename ne $new_filename ||
995: ! defined($current_symb) ||
996: $current_symb ne $symb) {
997: $cache_filename = $new_filename;
998: # Notice: $current_symb is not set to $symb until after the cache is
999: # loaded. This is what tells &load_analysis_cache to load in a new
1000: # symb cache.
1001: &load_analysis_cache($symb);
1002: $current_symb = $symb;
1003: }
1004: }
1005:
1006: #####################################################
1007: #####################################################
1008:
1009: =pod
1010:
1011: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1012:
1013: Stores the analysis data in the in memory cache.
1014:
1015: =cut
1016:
1017: #####################################################
1018: #####################################################
1019: sub store_analysis {
1020: my ($sname,$sdom,$symb,$dataset) = @_;
1021: return if ($symb ne $current_symb);
1022: $cache{$sname.':'.$sdom}=$dataset;
1023: return;
1024: }
1025:
1026: }
1027: #####################################################
1028: #####################################################
1029:
1030: =pod
1031:
1032: =back
1033:
1034: =cut
1035:
1036: #####################################################
1037: #####################################################
1038:
1039: ##
1040: ## The following is copied from datecalc1.pl, part of the
1041: ## Spreadsheet::WriteExcel CPAN module.
1042: ##
1043: ##
1044: ######################################################################
1045: #
1046: # Demonstration of writing date/time cells to Excel spreadsheets,
1047: # using UNIX/Perl time as source of date/time.
1048: #
1049: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1050: #
1051: ######################################################################
1052: #
1053: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1054: # measured in seconds.
1055: #
1056: # An Excel file can use exactly one of two different date/time systems.
1057: # In these systems, a floating point number represents the number of days
1058: # (and fractional parts of the day) since a start point. The floating point
1059: # number is referred to as a 'serial'.
1060: # The two systems ('1900' and '1904') use different starting points:
1061: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1062: # a leap year - see:
1063: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1064: # for the excuse^H^H^H^H^H^Hreason.
1065: # '1904'; '1.00' is 2 Jan 1904.
1066: #
1067: # The '1904' system is the default for Apple Macs. Windows versions of
1068: # Excel have the option to use the '1904' system.
1069: #
1070: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1071: # regard 1900 as a leap year, and thus its serials do not agree with
1072: # the 1900 serials of Excel for dates before 1 Mar 1900.
1073: #
1074: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1075: # regard 1900 as a leap year, and thus its serials do not agree with
1076: # the 1900 serials of Excel for dates before 1 Mar 1900.
1077: #
1078: ######################################################################
1079: #
1080: # Calculation description
1081: # =======================
1082: #
1083: # 1900 system
1084: # -----------
1085: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1086: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1087: # were leap years with an extra day.
1088: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1089: # 1 Jan 1970.
1090: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1091: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1092: #
1093: # 1904 system
1094: # -----------
1095: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1096: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1097: # were leap years with an extra day.
1098: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1099: # 1 Jan 1970.
1100: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1101: #
1102: ######################################################################
1103: #
1104: # Copyright (c) 2000, Andrew Benham.
1105: # This program is free software. It may be used, redistributed and/or
1106: # modified under the same terms as Perl itself.
1107: #
1108: # Andrew Benham, adsb@bigfoot.com
1109: # London, United Kingdom
1110: # 11 Nov 2000
1111: #
1112: ######################################################################
1113: #-----------------------------------------------------------
1114: # calc_serial()
1115: #
1116: # Called with (up to) 2 parameters.
1117: # 1. Unix timestamp. If omitted, uses current time.
1118: # 2. GMT flag. Set to '1' to return serial in GMT.
1119: # If omitted, returns serial in appropriate timezone.
1120: #
1121: # Returns date/time serial according to $DATE_SYSTEM selected
1122: #-----------------------------------------------------------
1123: sub calc_serial {
1124: # Use 1900 date system on all platforms other than Apple Mac (for which
1125: # use 1904 date system).
1126: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1127: my $time = (defined $_[0]) ? $_[0] : time();
1128: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1129: #
1130: # Divide timestamp by number of seconds in a day.
1131: # This gives a date serial with '0' on 1 Jan 1970.
1132: my $serial = $time / 86400;
1133: #
1134: # Adjust the date serial by the offset appropriate to the
1135: # currently selected system (1900/1904).
1136: if ($DATE_SYSTEM == 0) { # use 1900 system
1137: $serial += 25569;
1138: } else { # use 1904 system
1139: $serial += 24107;
1140: }
1141: #
1142: unless ($gmtflag) {
1143: # Now have a 'raw' serial with the right offset. But this
1144: # gives a serial in GMT, which is false unless the timezone
1145: # is GMT. We need to adjust the serial by the appropriate
1146: # timezone offset.
1147: # Calculate the appropriate timezone offset by seeing what
1148: # the differences between localtime and gmtime for the given
1149: # time are.
1150: #
1151: my @gmtime = gmtime($time);
1152: my @ltime = localtime($time);
1153: #
1154: # For the first 7 elements of the two arrays, adjust the
1155: # date serial where the elements differ.
1156: for (0 .. 6) {
1157: my $diff = $ltime[$_] - $gmtime[$_];
1158: if ($diff) {
1159: $serial += _adjustment($diff,$_);
1160: }
1161: }
1162: }
1163: #
1164: # Perpetuate the error that 1900 was a leap year by decrementing
1165: # the serial if we're using the 1900 system and the date is prior to
1166: # 1 Mar 1900. This has the effect of making serial value '60'
1167: # 29 Feb 1900.
1168: #
1169: # This fix only has any effect if UNIX/Perl time on the platform
1170: # can represent 1900. Many can't.
1171: #
1172: unless ($DATE_SYSTEM) {
1173: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1174: }
1175: return $serial;
1176: }
1177:
1178: sub _adjustment {
1179: # Based on the difference in the localtime/gmtime array elements
1180: # number, return the adjustment required to the serial.
1181: #
1182: # We only look at some elements of the localtime/gmtime arrays:
1183: # seconds unlikely to be different as all known timezones
1184: # have an offset of integral multiples of 15 minutes,
1185: # but it's easy to do.
1186: # minutes will be different for timezone offsets which are
1187: # not an exact number of hours.
1188: # hours very likely to be different.
1189: # weekday will differ when localtime/gmtime difference
1190: # straddles midnight.
1191: #
1192: # Assume that difference between localtime and gmtime is less than
1193: # 5 days, then don't have to do maths for day of month, month number,
1194: # year number, etc...
1195: #
1196: my ($delta,$element) = @_;
1197: my $adjust = 0;
1198: #
1199: if ($element == 0) { # Seconds
1200: $adjust = $delta/86400; # 60 * 60 * 24
1201: } elsif ($element == 1) { # Minutes
1202: $adjust = $delta/1440; # 60 * 24
1203: } elsif ($element == 2) { # Hours
1204: $adjust = $delta/24; # 24
1205: } elsif ($element == 6) { # Day of week number
1206: # Catch difference straddling Sat/Sun in either direction
1207: $delta += 7 if ($delta < -4);
1208: $delta -= 7 if ($delta > 4);
1209: #
1210: $adjust = $delta;
1211: }
1212: return $adjust;
1213: }
1214:
1215: ###########################################################
1216: ###########################################################
1217:
1218: =pod
1219:
1220: =item get_problem_data
1221:
1222: Returns a data structure describing the problem.
1223:
1224: Inputs: $url
1225:
1226: Returns: %Partdata
1227:
1228: =cut
1229:
1230: ## note: we must force each foil and option to not begin or end with
1231: ## spaces as they are stored without such data.
1232: ##
1233: ###########################################################
1234: ###########################################################
1235: sub get_problem_data {
1236: my ($url) = @_;
1237: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1238: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1239: my %Answer;
1240: %Answer=&Apache::lonnet::str2hash($Answ);
1241: my %Partdata;
1242: foreach my $part (@{$Answer{'parts'}}) {
1243: while (my($key,$value) = each(%Answer)) {
1244: #
1245: # Logging code:
1246: if (0) {
1247: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1248: if (ref($value) eq 'ARRAY') {
1249: &Apache::lonnet::logthis(' @'.join(',',@$value));
1250: } else {
1251: &Apache::lonnet::logthis(' '.$value);
1252: }
1253: }
1254: # End of logging code
1255: next if ($key !~ /^\Q$part\E/);
1256: $key =~ s/^\Q$part\E\.//;
1257: if (ref($value) eq 'ARRAY') {
1258: if ($key eq 'options') {
1259: $Partdata{$part}->{'_Options'}=$value;
1260: } elsif ($key eq 'concepts') {
1261: $Partdata{$part}->{'_Concepts'}=$value;
1262: } elsif ($key eq 'items') {
1263: $Partdata{$part}->{'_Items'}=$value;
1264: } elsif ($key =~ /^concept\.(.*)$/) {
1265: my $concept = $1;
1266: foreach my $foil (@$value) {
1267: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1268: $concept;
1269: }
1270: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1271: $Partdata{$part}->{$key}=$value;
1272: }
1273: } else {
1274: if ($key=~ /^foil\.text\.(.*)$/) {
1275: my $foil = $1;
1276: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1277: $value =~ s/(\s*$|^\s*)//g;
1278: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1279: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1280: my $foil = $1;
1281: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1282: } elsif ($key eq 'answercomputed') {
1283: $Partdata{$part}->{'answercomputed'} = $value;
1284: }
1285: }
1286: }
1287: }
1288: # Further debugging code
1289: if (0) {
1290: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1291: &log_hash_ref(\%Partdata);
1292: }
1293: return %Partdata;
1294: }
1295:
1296: sub log_array_ref {
1297: my ($arrayref,$prefix) = @_;
1298: return if (ref($arrayref) ne 'ARRAY');
1299: if (! defined($prefix)) { $prefix = ''; };
1300: foreach my $v (@$arrayref) {
1301: if (ref($v) eq 'ARRAY') {
1302: &log_array_ref($v,$prefix.' ');
1303: } elsif (ref($v) eq 'HASH') {
1304: &log_hash_ref($v,$prefix.' ');
1305: } else {
1306: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1307: }
1308: }
1309: }
1310:
1311: sub log_hash_ref {
1312: my ($hashref,$prefix) = @_;
1313: return if (ref($hashref) ne 'HASH');
1314: if (! defined($prefix)) { $prefix = ''; };
1315: while (my ($k,$v) = each(%$hashref)) {
1316: if (ref($v) eq 'ARRAY') {
1317: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1318: &log_array_ref($v,$prefix.' ');
1319: } elsif (ref($v) eq 'HASH') {
1320: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1321: &log_hash_ref($v,$prefix.' ');
1322: } else {
1323: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1324: }
1325: }
1326: }
1327: ####################################################
1328: ####################################################
1329:
1330: =pod
1331:
1332: =item &limit_by_time()
1333:
1334: =cut
1335:
1336: ####################################################
1337: ####################################################
1338: sub limit_by_time_form {
1339: my $Starttime_form = '';
1340: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1341: ('limitby_startdate');
1342: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1343: ('limitby_enddate');
1344: if (! defined($endtime)) {
1345: $endtime = time;
1346: }
1347: if (! defined($starttime)) {
1348: $starttime = $endtime - 60*60*24*7;
1349: }
1350: my $state;
1351: if (&limit_by_time()) {
1352: $state = '';
1353: } else {
1354: $state = 'disabled';
1355: }
1356: my $startdateform = &Apache::lonhtmlcommon::date_setter
1357: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1358: my $enddateform = &Apache::lonhtmlcommon::date_setter
1359: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1360: my $Str;
1361: $Str .= '<script type="text/javascript" language="JavaScript">';
1362: $Str .= 'function toggle_limitby_activity(state) {';
1363: $Str .= ' if (state) {';
1364: $Str .= ' limitby_startdate_enable();';
1365: $Str .= ' limitby_enddate_enable();';
1366: $Str .= ' } else {';
1367: $Str .= ' limitby_startdate_disable();';
1368: $Str .= ' limitby_enddate_disable();';
1369: $Str .= ' }';
1370: $Str .= '}';
1371: $Str .= '</script>';
1372: $Str .= '<fieldset>';
1373: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1374: if (&limit_by_time()) {
1375: $timecheckbox .= ' checked ';
1376: }
1377: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1378: $timecheckbox .= ' />';
1379: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1380: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1381: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1382: $Str .= '</fieldset>';
1383: return $Str;
1384: }
1385:
1386: sub limit_by_time {
1387: if (exists($env{'form.limit_by_time'}) &&
1388: $env{'form.limit_by_time'} ne '' ) {
1389: return 1;
1390: } else {
1391: return 0;
1392: }
1393: }
1394:
1395: sub get_time_limits {
1396: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1397: ('limitby_startdate');
1398: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1399: ('limitby_enddate');
1400: return ($starttime,$endtime);
1401: }
1402:
1403: ####################################################
1404: ####################################################
1405:
1406: =pod
1407:
1408: =item &manage_caches
1409:
1410: Inputs: $r, apache request object
1411:
1412: Returns: An array of scalars containing html for buttons.
1413:
1414: =cut
1415:
1416: ####################################################
1417: ####################################################
1418: sub manage_caches {
1419: my ($r,$formname,$inputname,$update_message) = @_;
1420: &Apache::loncoursedata::clear_internal_caches();
1421: my $sectionkey =
1422: join(',',
1423: map {
1424: &escape($_);
1425: } sort(&Apache::lonstatistics::get_selected_sections())
1426: );
1427: my $statuskey = $Apache::lonstatistics::enrollment_status;
1428: if (exists($env{'form.ClearCache'}) ||
1429: exists($env{'form.updatecaches'}) ||
1430: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1431: (exists($env{'form.prevsection'}) &&
1432: $env{'form.prevsection'} ne $sectionkey) ||
1433: (exists($env{'form.prevenrollstatus'}) &&
1434: $env{'form.prevenrollstatus'} ne $statuskey)
1435: ) {
1436: if (defined($update_message)) {
1437: $r->print($update_message);
1438: }
1439: if (0) {
1440: &Apache::lonnet::logthis('Updating mysql student data caches');
1441: }
1442: &gather_full_student_data($r,$formname,$inputname);
1443: }
1444: #
1445: my @Buttons =
1446: ('<input type="submit" name="ClearCache" '.
1447: 'value="'.&mt('Clear Caches').'" />',
1448: '<input type="submit" name="updatecaches" '.
1449: 'value="'.&mt('Update Caches').'" />'.
1450: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1451: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1452: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1453: );
1454: #
1455: if (! exists($env{'form.firstrun'})) {
1456: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1457: } else {
1458: $r->print('<input type="hidden" name="firstrun" value="no" />');
1459: }
1460: #
1461: return @Buttons;
1462: }
1463:
1464: sub gather_full_student_data {
1465: my ($r,$formname,$inputname) = @_;
1466: my $status_type;
1467: if (defined($formname)) {
1468: $status_type = 'inline';
1469: } else {
1470: $status_type = 'popup';
1471: }
1472: my $c = $r->connection();
1473: #
1474: &Apache::loncoursedata::clear_internal_caches();
1475: #
1476: my @Students = @Apache::lonstatistics::Students;
1477: #
1478: # Open the progress window
1479: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
1480: ($r,&mt('Student Data Compilation Status'),
1481: &mt('Student Data Compilation Progress'), scalar(@Students),
1482: $status_type,undef,$formname,$inputname);
1483: #
1484: while (my $student = shift @Students) {
1485: return if ($c->aborted());
1486: my $status = &Apache::loncoursedata::ensure_current_full_data
1487: ($student->{'username'},$student->{'domain'},
1488: $env{'request.course.id'});
1489: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1490: &mt('last student'));
1491: }
1492: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1493: $r->rflush();
1494: return;
1495: }
1496:
1497: ####################################################
1498: ####################################################
1499:
1500: =pod
1501:
1502: =item &submission_report_form
1503:
1504: Input: The originating reportSelected value for the current stats page.
1505:
1506: Output: Scalar containing HTML with needed form elements and a link to
1507: the student submission reports page.
1508:
1509: =cut
1510:
1511: ####################################################
1512: ####################################################
1513: sub submission_report_form {
1514: my ($original_report) = @_;
1515: # Note: In the link below we change the reportSelected value. If
1516: # the user hits the 'back' button on the browser after getting their
1517: # student submissions report, this value may still be around. So we
1518: # output a script block to set it properly. If the $original_report
1519: # value is unset, you are just asking for trouble.
1520: if (! defined($original_report)) {
1521: &Apache::lonnet::logthis
1522: ('someone called lonstathelpers::submission_report_form without '.
1523: ' enough input.');
1524: }
1525: my $html = $/.
1526: '<script type="text/javascript" language="JavaScript">'.
1527: "document.Statistics.reportSelected.value='$original_report';".
1528: '</script>'.
1529: '<input type="hidden" name="correctans" value="true" />'.
1530: '<input type="hidden" name="prob_status" value="true" />'.
1531: '<input type="hidden" name="all_sub" value="true" />';
1532: my $output_selector = $/.'<select name="output">'.$/;
1533: foreach ('HTML','Excel','CSV') {
1534: $output_selector .= ' <option value="'.lc($_).'"';
1535: if ($env{'form.output'} eq lc($_)) {
1536: $output_selector .= ' selected ';
1537: }
1538: $output_selector .='>'.&mt($_).'</option>'.$/;
1539: }
1540: $output_selector .= '</select>'.$/;
1541: my $link = '<a href="javascript:'.
1542: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1543: 'document.Statistics.submit();">';
1544: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1545: $link,'</a>').$/;
1546: return $html
1547: }
1548:
1549: ####################################################
1550: ####################################################
1551:
1552: =pod
1553:
1554: =back
1555:
1556: =cut
1557:
1558: ####################################################
1559: ####################################################
1560:
1561: 1;
1562:
1563: __END__
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