1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.76.2.2 2020/09/01 15:11:02 raeburn Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ####################################################
28: ####################################################
29:
30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonstathelpers - helper routines used by statistics
35:
36: =head1 SYNOPSIS
37:
38: This module provides a place to consolidate much of the statistics
39: routines that are needed across multiple statistics functions.
40:
41: =head1 OVERVIEW
42:
43: =over 4
44:
45: =cut
46:
47: ####################################################
48: ####################################################
49: package Apache::lonstathelpers;
50:
51: use strict;
52: use Apache::lonnet;
53: use Apache::loncommon();
54: use Apache::lonhtmlcommon();
55: use Apache::loncoursedata();
56: use Apache::lonstatistics;
57: use Apache::lonlocal;
58: use HTML::Entities();
59: use Time::Local();
60: use Spreadsheet::WriteExcel();
61: use GDBM_File;
62: use Storable qw(freeze thaw);
63: use lib '/home/httpd/lib/perl/';
64: use LONCAPA;
65:
66:
67: ####################################################
68: ####################################################
69:
70: =pod
71:
72: =item &render_resource($resource)
73:
74: Input: a navmaps resource
75:
76: Retunrs: a scalar containing html for a rendering of the problem
77: within a table.
78:
79: =cut
80:
81: ####################################################
82: ####################################################
83: sub render_resource {
84: my ($resource) = @_;
85: ##
86: ## Render the problem
87: my ($base) = ($resource->src =~ m|^(.*/)[^/]*$|);
88: $base="http://".$ENV{'SERVER_NAME'}.$base;
89: my ($src,$symb)=($resource->link,&escape($resource->shown_symb));
90: my $rendered_problem = &Apache::lonnet::ssi_body($src.'?symb='.$symb);
91: $rendered_problem =~ s/<\s*form\s*/<nop /g;
92: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
93: return '<div class="LC_Box">'.
94: '<h4 class="LC_hcell">'.&mt('Problem').'</h4>'.
95: '<base href="'.$base.'" />'.$rendered_problem.
96: '</div>';
97: }
98:
99: ####################################################
100: ####################################################
101:
102: =pod
103:
104: =item &get_resources
105:
106: =cut
107:
108: ####################################################
109: ####################################################
110: sub get_resources {
111: my ($navmap,$sequence) = @_;
112: my @resources = $navmap->retrieveResources($sequence,
113: sub { shift->is_problem(); },
114: 0,0,0);
115: return @resources;
116: }
117:
118: ####################################################
119: ####################################################
120:
121: =pod
122:
123: =item &problem_selector($AcceptedResponseTypes)
124:
125: Input: scalar containing regular expression which matches response
126: types to show. '.' will yield all, '(option|radiobutton)' will match
127: all option response and radiobutton problems.
128:
129: Returns: A string containing html for a table which lists the sequences
130: and their contents. A radiobutton is provided for each problem.
131: Skips 'survey' problems.
132:
133: =cut
134:
135: ####################################################
136: ####################################################
137: sub problem_selector {
138: my ($AcceptedResponseTypes,$sequence_addendum,$symbmode,$all,$prefix,
139: $byres,$include_tools,$smallbox,$onclick) = @_;
140: # all: also make sequences selectable
141: # prefix: prefix for all form names
142: # byres: radiobutton shown per resource
143: # include_tools: external tools included
144: # smallbox: use smaller box
145: # onclick: javascript to execute when clicked
146: my $Str;
147: my $jsadd='';
148: if ($onclick) {
149: $jsadd="onclick='$onclick'";
150: }
151: $Str = &Apache::loncommon::start_scrollbox(($smallbox?'420px':'620px'),
152: ($smallbox?'400px':'600px'),
153: ($smallbox?'60px':'300px')).
154: &Apache::loncommon::start_data_table();
155: my $rb_count =0;
156: my ($navmap,@sequences) =
157: &Apache::lonstatistics::selected_sequences_with_assessments('all');
158: return $navmap if (! ref($navmap)); # error
159: foreach my $seq (@sequences) {
160: my $seq_str = '';
161: foreach my $res (&get_resources($navmap,$seq)) {
162: if ($res->src() eq '/res/lib/templates/simpleproblem.problem') {
163: next if (grep(/^placeholder$/,@{$res->parts}));
164: }
165: my $title = $res->compTitle;
166: if (! defined($title) || $title eq '') {
167: ($title) = ($res->src =~ m:/([^/]*)$:);
168: }
169: my $totalresps = 0;
170: if ($byres) {
171: foreach my $part (@{$res->parts}) {
172: $totalresps += scalar($res->responseIds($part));
173: }
174: my $value = &HTML::Entities::encode($res->symb(),'<>&"');
175: my $checked;
176: if ($env{'form.problemchoice'} eq $res->symb()) {
177: $checked = ' checked="checked"';
178: }
179: my $rowspan;
180: if ($totalresps > 1) {
181: $rowspan = ' rowspan="'.$totalresps.'"';
182: }
183: $seq_str .= &Apache::loncommon::start_data_table_row().
184: '<td'.$rowspan.' style="vertical-align:middle">'.
185: '<label><input type="radio" name="symb" value="'.$value.'"'.$checked.' />'.
186: $title.'</label>';
187: my $link = $res->link.'?symb='.&escape($res->shown_symb);
188: $seq_str .= (' 'x2).
189: '<a target="preview" href="'.$link.'">'.&mt('view').'</a></td>';
190: }
191: my %partsseen;
192: foreach my $part (@{$res->parts}) {
193: my @response_ids = $res->responseIds($part);
194: my @response_types = $res->responseType($part);
195: for (my $i=0;$i<scalar(@response_types);$i++){
196: my $respid = $response_ids[$i];
197: my $resptype = $response_types[$i];
198: if ($resptype =~ m/$AcceptedResponseTypes/) {
199: if ($byres) {
200: unless (exists($partsseen{$part})) {
201: my $parttitle = $part;
202: if ($part eq '0') {
203: $parttitle = '';
204: }
205: if ($parttitle ne '') {
206: $parttitle = (' 'x2).&mt('part').': '.$parttitle;
207: }
208: if (keys(%partsseen)) {
209: $seq_str .= &Apache::loncommon::continue_data_table_row();
210: }
211: unless ($partsseen{$part}) {
212: $seq_str .= '<td rowspan="'.scalar(@response_ids).'" style="vertical-align:middle">'.
213: $parttitle.'</td>';
214: $partsseen{$part} = scalar(@response_ids);
215: }
216: }
217: $seq_str .= '<td>'.$resptype;
218: if (scalar(@response_ids) > 1) {
219: $seq_str .= ' '.&mt('id').': '.$respid;
220: }
221: $seq_str .= '</td>'. &Apache::loncommon::end_data_table_row()."\n";
222: } else {
223: my $value = &make_target_id({symb=>$res->symb,
224: part=>$part,
225: respid=>$respid,
226: resptype=>$resptype});
227: my $checked = '';
228: if ($env{'form.problemchoice'} eq $value) {
229: $checked = ' checked="checked"';
230: }
231: $seq_str .= &Apache::loncommon::start_data_table_row().
232: ($symbmode?
233: '<td><input type="radio" id="'.$prefix.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($res->symb,'<>&"').'" '.$checked.' '.
234: $jsadd.
235: ' /></td>'
236: :qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value"$checked /></td>}).
237: '<td><label for="'.$prefix.$rb_count.'">'.$resptype.'</label></td>'.
238: '<td><label for="'.$prefix.$rb_count.'">'.$title.'</label>';
239: if (scalar(@response_ids) > 1) {
240: $seq_str .= &mt('response').' '.$respid;
241: }
242: my $link = $res->link.'?symb='.&escape($res->shown_symb);
243: $seq_str .= (' 'x2).
244: '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
245: $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
246: $rb_count++;
247: }
248: }
249: }
250: }
251: }
252: if ($seq_str ne '') {
253: if ($byres) {
254: $Str .= &Apache::loncommon::start_data_table_header_row().
255: '<th colspan="3">'.$seq->compTitle.'</th>'.
256: &Apache::loncommon::end_data_table_header_row().
257: $seq_str;
258: } else {
259: $Str .= &Apache::loncommon::start_data_table_header_row().
260: '<th colspan="3">'.
261: ($all?'<input type="radio" id="'.$prefix.'s'.$rb_count.'" name="'.$prefix.'symb" value="'.&HTML::Entities::encode($seq->symb,'<>&').'" '.$jsadd.' />':'').
262: $seq->compTitle.'</th>'.
263: &Apache::loncommon::end_data_table_header_row()."\n".$seq_str;
264: if (defined($sequence_addendum)) {
265: $Str .= &Apache::loncommon::start_data_table_header_row().
266: ('<td> </td>'x2).
267: '<td align="right">'.$sequence_addendum.'</td>'.
268: &Apache::loncommon::end_data_table_header_row()."\n";
269: }
270: }
271: }
272: }
273: $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
274: return $Str;
275: }
276:
277: ####################################################
278: ####################################################
279:
280: =pod
281:
282: =item &MultipleProblemSelector($navmap,$selected,$inputname)
283:
284: Generate HTML with checkboxes for problem selection.
285:
286: Input:
287:
288: $navmap: a navmap object. If undef, navmaps will be called to create a
289: new object.
290:
291: $selected: Scalar, Array, or hash reference of currently selected items.
292:
293: $inputname: The name of the form elements to use for the checkboxs.
294:
295: Returns: A string containing html for a table which lists the sequences
296: and their contents. A checkbox is provided for each problem.
297:
298: =cut
299:
300: ####################################################
301: ####################################################
302: sub MultipleProblemSelector {
303: my ($navmap,$inputname,$formname,$anoncounter)=@_;
304: my $cid = $env{'request.course.id'};
305: my $Str;
306: # Massage the input as needed.
307: if (! defined($navmap)) {
308: $navmap = Apache::lonnavmaps::navmap->new();
309: if (! defined($navmap)) {
310: $Str .= '<div class="LC_error">'
311: .&mt('Error: cannot process course structure')
312: .'</div>';
313: return $Str;
314: }
315: }
316: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
317: # Header
318: $Str .= <<"END";
319: <script type="text/javascript" language="JavaScript">
320: function checkall(value,seqid) {
321: for (i=0; i<document.forms.$formname.elements.length; i++) {
322: ele = document.forms.$formname.elements[i];
323: if (ele.name == '$inputname') {
324: if (seqid != null) {
325: itemid = document.forms.$formname.elements[i].id;
326: thing = itemid.split(':');
327: if (thing[0] == seqid) {
328: document.forms.$formname.elements[i].checked=value;
329: }
330: } else {
331: document.forms.$formname.elements[i].checked=value;
332: }
333: }
334: }
335: }
336: </script>
337: END
338: my $checkanonjs = <<"END";
339:
340: <script type="text/javascript" language="JavaScript">
341: function checkanon() {
342: return true;
343: }
344: </script>
345:
346: END
347: if (ref($anoncounter) eq 'HASH') {
348: if (keys(%{$anoncounter}) > 0) {
349: 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");
350: &js_escape(\$anonwarning);
351: $checkanonjs = <<"END";
352:
353: <script type="text/javascript" language="JavaScript">
354: function checkanon() {
355: anoncount = 0;
356: namedcount = 0;
357: for (i=0; i<document.forms.$formname.elements.length; i++) {
358: ele = document.forms.$formname.elements[i];
359: if (ele.name == '$inputname') {
360: itemid = document.forms.$formname.elements[i].id;
361: if (document.forms.$formname.elements[i].checked) {
362: anonid = 'anonymous_'+itemid;
363: mixid = 'mixed_'+itemid;
364: anonele = document.getElementById(anonid);
365: mixele = document.getElementById(mixid);
366: if (anonele.value > 0) {
367: if (mixele.value == 'none') {
368: anoncount ++;
369: } else {
370: if (mixele.value == '0') {
371: if (mixele.checked) {
372: anoncount ++;
373: } else {
374: namedcount ++;
375: }
376: } else {
377: namedcount ++;
378: }
379: }
380: } else {
381: namedcount ++;
382: }
383: }
384: }
385: }
386: if (anoncount > 0 && namedcount > 0) {
387: alert("$anonwarning");
388: return false;
389: }
390: }
391: </script>
392:
393: END
394: }
395: }
396: $Str .= $checkanonjs.
397: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
398: (' 'x4).
399: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
400: $Str .= $/.'<table>'.$/;
401: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
402: my $sequence_string;
403: my $seq_id = 0;
404: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
405: '',
406: '',
407: $seq_id++,
408: $inputname));
409: my @Sequence_Data;
410: while (my $curRes = $iterator->next()) {
411: if ($curRes == $iterator->END_MAP) {
412: if (ref($Accumulator[-1]) eq 'CODE') {
413: my $old_accumulator = pop(@Accumulator);
414: push(@Sequence_Data,&{$old_accumulator}());
415: }
416: } elsif ($curRes == $iterator->BEGIN_MAP) {
417: # Not much to do here.
418: }
419: next if (! ref($curRes));
420: if ($curRes->is_map) {
421: push(@Accumulator,&new_accumulator($curRes->compTitle,
422: $curRes->src,
423: $curRes->symb,
424: $seq_id++,
425: $inputname));
426: } elsif ($curRes->is_problem) {
427: my $anonpart = 0;
428: my $namedpart = 0;
429: my @parts = @{$curRes->parts()};
430: if (ref($anoncounter) eq 'HASH') {
431: if (keys(%{$anoncounter}) > 0) {
432: my @parts = @{$curRes->parts()};
433: my $symb = $curRes->symb();
434: foreach my $part (@parts) {
435: if ((exists($anoncounter->{$symb."\0".$part})) ||
436: $curRes->is_anonsurvey($part)) {
437: $anonpart ++;
438: } else {
439: $namedpart ++
440: }
441: }
442: }
443: }
444: if (@Accumulator && $Accumulator[-1] ne '') {
445: &{$Accumulator[-1]}($curRes,
446: exists($selected->{$curRes->symb}),
447: $anonpart,$namedpart);
448: }
449: }
450: }
451: my $course_seq = pop(@Sequence_Data);
452: foreach my $seq ($course_seq,@Sequence_Data) {
453: #my $seq = pop(@Sequence_Data);
454: next if (! defined($seq) || ref($seq) ne 'HASH');
455: $Str.= '<tr><td colspan="2">'.
456: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
457: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
458: &mt('Select').'</a>'.(' 'x2).
459: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
460: &mt('Unselect').'</a>'.(' 'x2).
461: '</td></tr>'.$/;
462: $Str.= $seq->{'html'};
463: }
464: $Str .= '</table>'.$/;
465: return $Str;
466: }
467:
468: sub new_accumulator {
469: my ($title,$src,$symb,$seq_id,$inputname) = @_;
470: my $target;
471: my $item_id=0;
472: return
473: sub {
474: if (@_) {
475: my ($res,$checked,$anonpart,$namedpart) = @_;
476: $target.='<tr><td><label>'.
477: '<input type="checkbox" name="'.$inputname.'" ';
478: if ($checked) {
479: $target .= 'checked="checked" ';
480: }
481: my $anon_id = $item_id;
482: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
483: my $esc_symb = &escape($res->symb);
484: $target.=
485: 'value="'.$esc_symb.'" />'.
486: ' '.$res->compTitle.'</label>'.
487: (' 'x2).'<a target="preview" '.
488: 'href="'.$res->link.'?symb='.
489: &escape($res->shown_symb).'">'.&mt('view').'</a>'.
490: '<input type="hidden" id="anonymous_'.$seq_id.':'.$anon_id.'" name="hidden_'.$seq_id.':'.$anon_id.'" value="'.$anonpart.'" />';
491: my $mixed = '<input type="hidden" id="mixed_'.$seq_id.':'.$anon_id.'" value="none" name="mixed_'.$seq_id.':'.$anon_id.'" />';
492: if ($anonpart) {
493: if ($namedpart) {
494: my $checknamed = '';
495: my $checkedanon = ' checked="checked"';
496: if ($env{'form.mixed_'.$seq_id.':'.$anon_id} eq $esc_symb) {
497: $checknamed = $checkedanon;
498: $checkedanon = '';
499: }
500: $mixed = ' ('.
501: &mt('Both anonymous and named submissions -- display: [_1]Anonymous [_2]Named[_3]',
502: '<span class="LC_nobreak"><label>'.
503: '<input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
504: '" value="0" id="mixed_'.$seq_id.':'.$anon_id.'"'.$checkedanon.' />',
505: '</label></span>'.(' 'x2).' <span class="LC_nobreak">'.
506: '<label><input type="radio" name="mixed_'.$seq_id.':'.$anon_id.
507: '" value="symb_'.$esc_symb.'" id="named_'.$seq_id.':'.$anon_id.'"'.$checknamed.' />',
508: '</label></span>').')';
509: } else {
510: $target .= ' '.&mt('(Anonymous Survey)');
511: }
512: }
513: $target.= $mixed.'</td></tr>'.$/;
514: } else {
515: if (defined($target)) {
516: return { title => $title,
517: symb => $symb,
518: src => $src,
519: id => $seq_id,
520: html => $target, };
521: }
522: return undef;
523: }
524: };
525: }
526:
527: sub get_selected_symbs {
528: my ($inputfield) = @_;
529: my $field = 'form.'.$inputfield;
530: my @symbs = (map {
531: &unescape($_);
532: } &Apache::loncommon::get_env_multiple($field));
533: return @symbs;
534: }
535:
536: ####################################################
537: ####################################################
538:
539: =pod
540:
541: =item &make_target_id($target)
542:
543: Inputs: Hash ref with the following entries:
544: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
545: $target->{'resptype'}.
546:
547: Returns: A string, suitable for a form parameter, which uniquely identifies
548: the problem, part, and response to do statistical analysis on.
549:
550: Used by Apache::lonstathelpers::ProblemSelector().
551:
552: =cut
553:
554: ####################################################
555: ####################################################
556: sub make_target_id {
557: my ($target) = @_;
558: my $id = &escape($target->{'symb'}).':'.
559: &escape($target->{'part'}).':'.
560: &escape($target->{'respid'}).':'.
561: &escape($target->{'resptype'});
562: return $id;
563: }
564:
565: ####################################################
566: ####################################################
567:
568: =pod
569:
570: =item &get_target_from_id($id)
571:
572: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
573:
574: Returns: A hash reference, $target, containing the following keys:
575: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
576: $target->{'resptype'}.
577:
578: =cut
579:
580: ####################################################
581: ####################################################
582: sub get_target_from_id {
583: my ($id) = @_;
584: if (! ref($id)) {
585: my ($symb,$part,$respid,$resptype) = split(':',$id);
586: return ({ symb => &unescape($symb),
587: part => &unescape($part),
588: respid => &unescape($respid),
589: resptype => &unescape($resptype)});
590: } elsif (ref($id) eq 'ARRAY') {
591: my @Return;
592: foreach my $selected (@$id) {
593: my ($symb,$part,$respid,$resptype) = split(':',$selected);
594: push(@Return,{ symb => &unescape($symb),
595: part => &unescape($part),
596: respid => &unescape($respid),
597: resptype => &unescape($resptype)});
598: }
599: return \@Return;
600: }
601: }
602:
603: ####################################################
604: ####################################################
605:
606: =pod
607:
608: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
609:
610: Determine the problem parts or responses preceeding and following the
611: current resource.
612:
613: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
614: $AcceptableResponseTypes, regular expression matching acceptable
615: response types,
616: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
617:
618: Returns: three hash references, $prev, $curr, $next, which refer to the
619: preceeding, current, or following problem parts or responses, depending
620: on the value of $granularity. Values of undef indicate there is no
621: previous or next part/response. A value of undef for all three indicates
622: there was no match found to the current part/resource.
623:
624: The hash references contain the following keys:
625: symb, part, resource
626:
627: If $granularity eq 'response', the following ADDITIONAL keys will be present:
628: respid, resptype
629:
630: =cut
631:
632: ####################################################
633: ####################################################
634: sub get_prev_curr_next {
635: my ($target,$AcceptableResponseTypes,$granularity) = @_;
636: #
637: # Build an array with the data we need to search through
638: my @Resource;
639: my ($navmap,@sequences) =
640: &Apache::lonstatistics::selected_sequences_with_assessments('all');
641: return $navmap if (! ref($navmap));
642: foreach my $seq (@sequences) {
643: my @resources = &get_resources($navmap,$seq);
644: foreach my $res (@resources) {
645: foreach my $part (@{$res->parts}) {
646: if (($res->is_survey($part) || ($res->is_anonsurvey($part))) &&
647: ($granularity eq 'part_survey')) {
648: push (@Resource,
649: { symb => $res->symb,
650: part => $part,
651: resource => $res,
652: } );
653: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
654: push (@Resource,
655: { symb => $res->symb,
656: part => $part,
657: resource => $res,
658: } );
659: } elsif ($granularity eq 'part') {
660: push (@Resource,
661: { symb => $res->symb,
662: part => $part,
663: resource => $res,
664: } );
665: } elsif ($granularity eq 'response') {
666: my @response_ids = $res->responseIds($part);
667: my @response_types = $res->responseType($part);
668: for (my $i=0;
669: $i<scalar(@response_ids);
670: $i++){
671: my $respid = $response_ids[$i];
672: my $resptype = $response_types[$i];
673: next if ($resptype !~ m/$AcceptableResponseTypes/);
674: push (@Resource,
675: { symb => $res->symb,
676: part => $part,
677: respid => $respid,
678: resptype => $resptype,
679: resource => $res,
680: } );
681: }
682: }
683: }
684: }
685: }
686: #
687: # Get the index of the current situation
688: my $curr_idx;
689: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
690: my $curr_item = $Resource[$curr_idx];
691: if ($granularity =~ /^(part|part_survey|part_task)$/) {
692: if ($curr_item->{'symb'} eq $target->{'symb'} &&
693: $curr_item->{'part'} eq $target->{'part'}) {
694: last;
695: }
696: } elsif ($granularity eq 'response') {
697: if ($curr_item->{'symb'} eq $target->{'symb'} &&
698: $curr_item->{'part'} eq $target->{'part'} &&
699: $curr_item->{'respid'} eq $target->{'respid'} &&
700: $curr_item->{'resptype'} eq $target->{'resptype'}) {
701: last;
702: }
703: }
704: }
705: my $curr_item = $Resource[$curr_idx];
706: if ($granularity =~ /^(part|part_survey|part_task)$/) {
707: if ($curr_item->{'symb'} ne $target->{'symb'} ||
708: $curr_item->{'part'} ne $target->{'part'}) {
709: # bogus symb - return nothing
710: return (undef,undef,undef);
711: }
712: } elsif ($granularity eq 'response') {
713: if ($curr_item->{'symb'} ne $target->{'symb'} ||
714: $curr_item->{'part'} ne $target->{'part'} ||
715: $curr_item->{'respid'} ne $target->{'respid'} ||
716: $curr_item->{'resptype'} ne $target->{'resptype'}){
717: # bogus symb - return nothing
718: return (undef,undef,undef);
719: }
720: }
721: #
722: # Now just pick up the data we need
723: my ($prev,$curr,$next);
724: if ($curr_idx == 0) {
725: $prev = undef;
726: $curr = $Resource[$curr_idx ];
727: $next = $Resource[$curr_idx+1];
728: } elsif ($curr_idx == $#Resource) {
729: $prev = $Resource[$curr_idx-1];
730: $curr = $Resource[$curr_idx ];
731: $next = undef;
732: } else {
733: $prev = $Resource[$curr_idx-1];
734: $curr = $Resource[$curr_idx ];
735: $next = $Resource[$curr_idx+1];
736: }
737: return ($navmap,$prev,$curr,$next);
738: }
739:
740:
741: #####################################################
742: #####################################################
743:
744: =pod
745:
746: =item GetStudentAnswers($r,$problem,$Students)
747:
748: Determines the correct answer for a set of students on a given problem.
749: The students answers are stored in the student hashes pointed to by the
750: array @$Students under the key 'answer'.
751:
752: Inputs: $r
753: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
754: $Students: reference to array containing student hashes (need 'username',
755: 'domain').
756:
757: Returns: nothing
758:
759: =cut
760:
761: #####################################################
762: #####################################################
763: sub GetStudentAnswers {
764: my ($r,$problem,$Students,$formname,$inputname) = @_;
765: my %answers;
766: my $status_type;
767: if (defined($formname)) {
768: $status_type = 'inline';
769: } else {
770: $status_type = 'popup';
771: }
772: my $c = $r->connection();
773: my %Answers;
774: my ($resource,$partid,$respid) = ($problem->{'resource'},
775: $problem->{'part'},
776: $problem->{'respid'});
777: # Read in the cache (if it exists) before we start timing things.
778: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
779: # Open progress window
780: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$Students));
781: $r->rflush();
782: foreach my $student (@$Students) {
783: last if ($c->aborted());
784: my $sname = $student->{'username'};
785: my $sdom = $student->{'domain'};
786: my $answer = &Apache::lonstathelpers::get_student_answer
787: ($resource,$sname,$sdom,$partid,$respid);
788: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
789: 'last student');
790: $answers{$answer}++;
791: $student->{'answer'} = $answer;
792: }
793: &Apache::lonstathelpers::write_analysis_cache();
794: return if ($c->aborted());
795: $r->rflush();
796: # close progress window
797: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
798: return \%answers;
799: }
800:
801: #####################################################
802: #####################################################
803:
804: =pod
805:
806: =item analyze_problem_as_student
807:
808: Analyzes a homework problem for a student
809:
810: Inputs: $resource: a resource object
811: $sname, $sdom, $partid, $respid
812:
813: Returns: the problem analysis hash
814:
815: =cut
816:
817: #####################################################
818: #####################################################
819: sub analyze_problem_as_student {
820: my ($resource,$sname,$sdom) = @_;
821: if (ref($resource) ne 'HASH') {
822: my $res = $resource;
823: $resource = { 'src' => $res->src,
824: 'symb' => $res->symb,
825: 'parts' => $res->parts };
826: foreach my $part (@{$resource->{'parts'}}) {
827: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
828: [$res->responseIds($part)];
829: }
830: }
831: my $url = $resource->{'src'};
832: my $symb = $resource->{'symb'};
833: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
834: if (! defined($analysis)) {
835: my $courseid = $env{'request.course.id'};
836: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
837: 'grade_domain' => $sdom,
838: 'grade_username' => $sname,
839: 'grade_symb' => $symb,
840: 'grade_courseid' => $courseid));
841: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
842: &store_analysis($sname,$sdom,$symb,$analysis);
843: }
844: my %Answer=&Apache::lonnet::str2hash($analysis);
845: #
846: return \%Answer;
847: }
848:
849: #####################################################
850: #####################################################
851:
852: =pod
853:
854: =item get_student_answer
855:
856: Analyzes a homework problem for a particular student and returns the correct
857: answer. Attempts to put together an answer for problem types
858: that do not natively support it.
859:
860: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
861: $sname, $sdom, $partid, $respid
862:
863: Returns: $answer
864:
865: If $partid and $respid are specified, $answer is simply a scalar containing
866: the correct answer for the response.
867:
868: If $partid or $respid are undefined, $answer will be a hash reference with
869: keys $partid.'.'.$respid.'.answer'.
870:
871: =cut
872:
873: #####################################################
874: #####################################################
875: sub get_student_answer {
876: my ($resource,$sname,$sdom,$partid,$respid) = @_;
877: #
878: if (ref($resource) ne 'HASH') {
879: my $res = $resource;
880: $resource = { 'src' => $res->src,
881: 'symb' => $res->symb,
882: 'parts' => $res->parts };
883: foreach my $part (@{$resource->{'parts'}}) {
884: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
885: [$res->responseIds($part)];
886: }
887: }
888: #
889: my $analysis =
890: &analyze_problem_as_student($resource,$sname,$sdom);
891: my $answer;
892: foreach my $partid (@{$resource->{'parts'}}) {
893: my $partdata = $resource->{'partdata'}->{$partid};
894: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
895: my $prefix = $partid.'.'.$respid;
896: my $key = $prefix.'.answer';
897: $answer->{$partid}->{$respid} =
898: &get_answer($prefix,$key,%$analysis);
899: }
900: }
901: my $returnvalue;
902: if (! defined($partid)) {
903: $returnvalue = $answer;
904: } elsif (! defined($respid)) {
905: $returnvalue = $answer->{$partid};
906: } else {
907: $returnvalue = $answer->{$partid}->{$respid};
908: }
909: return $returnvalue;
910: }
911:
912: sub get_answer {
913: my ($prefix,$key,%Answer) = @_;
914: my $returnvalue;
915: if (exists($Answer{$key})) {
916: if (ref($Answer{$key}) eq 'HASH') {
917: my $which = 'INTERNAL';
918: if (!exists($Answer{$key}{$which})) {
919: $which = (sort(keys(%{ $Answer{$key} })))[0];
920: }
921: my $student_answer = $Answer{$key}{$which}[0][0];
922: $returnvalue = $student_answer;
923: } else {
924: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
925: }
926: } else {
927: if (exists($Answer{$prefix.'.shown'})) {
928: # The response has foils
929: my %values;
930: while (my ($k,$v) = each(%Answer)) {
931: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
932: my $foilname = $2;
933: $values{$foilname}=$v;
934: }
935: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
936: if (ref($values{$foil}) eq 'ARRAY') {
937: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
938: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
939: } else {
940: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
941: &HTML::Entities::encode($values{$foil},'<>&"').'&';
942: }
943: }
944: $returnvalue =~ s/ /\%20/g;
945: chop ($returnvalue);
946: }
947: }
948: return $returnvalue;
949: }
950:
951: #####################################################
952: #####################################################
953:
954: =pod
955:
956: =item Caching routines
957:
958: =over 4
959:
960: =item &load_analysis_cache($symb)
961:
962: Loads the cache for the given symb into memory from disk.
963: Requires the cache filename be set.
964: Only should be called by &ensure_proper_cache.
965:
966: =cut
967:
968: #####################################################
969: #####################################################
970: {
971: my $cache_filename = undef;
972: my $current_symb = undef;
973: my %cache;
974:
975: sub load_analysis_cache {
976: my ($symb) = @_;
977: return if (! defined($cache_filename));
978: if (! defined($current_symb) || $current_symb ne $symb) {
979: undef(%cache);
980: my $storedstring;
981: my %cache_db;
982: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
983: $storedstring = $cache_db{&escape($symb)};
984: untie(%cache_db);
985: }
986: if (defined($storedstring)) {
987: %cache = %{thaw($storedstring)};
988: }
989: }
990: return;
991: }
992:
993: #####################################################
994: #####################################################
995:
996: =pod
997:
998: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
999:
1000: Returns the appropriate data from the cache, or undef if no data exists.
1001:
1002: =cut
1003:
1004: #####################################################
1005: #####################################################
1006: sub get_from_analysis_cache {
1007: my ($sname,$sdom,$symb) = @_;
1008: &ensure_proper_cache($symb);
1009: my $returnvalue;
1010: if (exists($cache{$sname.':'.$sdom})) {
1011: $returnvalue = $cache{$sname.':'.$sdom};
1012: } else {
1013: $returnvalue = undef;
1014: }
1015: return $returnvalue;
1016: }
1017:
1018: #####################################################
1019: #####################################################
1020:
1021: =pod
1022:
1023: =item &write_analysis_cache($symb)
1024:
1025: Writes the in memory cache to disk so that it can be read in with
1026: &load_analysis_cache($symb).
1027:
1028: =cut
1029:
1030: #####################################################
1031: #####################################################
1032: sub write_analysis_cache {
1033: return if (! defined($current_symb) || ! defined($cache_filename));
1034: my %cache_db;
1035: my $key = &escape($current_symb);
1036: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
1037: my $storestring = freeze(\%cache);
1038: $cache_db{$key}=$storestring;
1039: $cache_db{$key.'.time'}=time;
1040: untie(%cache_db);
1041: }
1042: undef(%cache);
1043: undef($current_symb);
1044: undef($cache_filename);
1045: return;
1046: }
1047:
1048: #####################################################
1049: #####################################################
1050:
1051: =pod
1052:
1053: =item &ensure_proper_cache($symb)
1054:
1055: Called to make sure we have the proper cache set up. This is called
1056: prior to every analysis lookup.
1057:
1058: =cut
1059:
1060: #####################################################
1061: #####################################################
1062: sub ensure_proper_cache {
1063: my ($symb) = @_;
1064: my $cid = $env{'request.course.id'};
1065: my $new_filename = LONCAPA::tempdir() .
1066: 'problemanalysis_'.$cid.'_analysis_cache.db';
1067: if (! defined($cache_filename) ||
1068: $cache_filename ne $new_filename ||
1069: ! defined($current_symb) ||
1070: $current_symb ne $symb) {
1071: $cache_filename = $new_filename;
1072: # Notice: $current_symb is not set to $symb until after the cache is
1073: # loaded. This is what tells &load_analysis_cache to load in a new
1074: # symb cache.
1075: &load_analysis_cache($symb);
1076: $current_symb = $symb;
1077: }
1078: }
1079:
1080: #####################################################
1081: #####################################################
1082:
1083: =pod
1084:
1085: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1086:
1087: Stores the analysis data in the in memory cache.
1088:
1089: =cut
1090:
1091: #####################################################
1092: #####################################################
1093: sub store_analysis {
1094: my ($sname,$sdom,$symb,$dataset) = @_;
1095: return if ($symb ne $current_symb);
1096: $cache{$sname.':'.$sdom}=$dataset;
1097: return;
1098: }
1099:
1100: }
1101: #####################################################
1102: #####################################################
1103:
1104: =pod
1105:
1106: =back
1107:
1108: =cut
1109:
1110: #####################################################
1111: #####################################################
1112:
1113: ##
1114: ## The following is copied from datecalc1.pl, part of the
1115: ## Spreadsheet::WriteExcel CPAN module.
1116: ##
1117: ##
1118: ######################################################################
1119: #
1120: # Demonstration of writing date/time cells to Excel spreadsheets,
1121: # using UNIX/Perl time as source of date/time.
1122: #
1123: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
1124: #
1125: ######################################################################
1126: #
1127: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
1128: # measured in seconds.
1129: #
1130: # An Excel file can use exactly one of two different date/time systems.
1131: # In these systems, a floating point number represents the number of days
1132: # (and fractional parts of the day) since a start point. The floating point
1133: # number is referred to as a 'serial'.
1134: # The two systems ('1900' and '1904') use different starting points:
1135: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
1136: # a leap year - see:
1137: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
1138: # for the excuse^H^H^H^H^H^Hreason.
1139: # '1904'; '1.00' is 2 Jan 1904.
1140: #
1141: # The '1904' system is the default for Apple Macs. Windows versions of
1142: # Excel have the option to use the '1904' system.
1143: #
1144: # Note that Visual Basic's "DateSerial" function does NOT erroneously
1145: # regard 1900 as a leap year, and thus its serials do not agree with
1146: # the 1900 serials of Excel for dates before 1 Mar 1900.
1147: #
1148: # Note that StarOffice (at least at version 5.2) does NOT erroneously
1149: # regard 1900 as a leap year, and thus its serials do not agree with
1150: # the 1900 serials of Excel for dates before 1 Mar 1900.
1151: #
1152: ######################################################################
1153: #
1154: # Calculation description
1155: # =======================
1156: #
1157: # 1900 system
1158: # -----------
1159: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
1160: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1161: # were leap years with an extra day.
1162: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
1163: # 1 Jan 1970.
1164: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
1165: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
1166: #
1167: # 1904 system
1168: # -----------
1169: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
1170: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
1171: # were leap years with an extra day.
1172: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
1173: # 1 Jan 1970.
1174: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
1175: #
1176: ######################################################################
1177: #
1178: # Copyright (c) 2000, Andrew Benham.
1179: # This program is free software. It may be used, redistributed and/or
1180: # modified under the same terms as Perl itself.
1181: #
1182: # Andrew Benham, adsb@bigfoot.com
1183: # London, United Kingdom
1184: # 11 Nov 2000
1185: #
1186: ######################################################################
1187: #-----------------------------------------------------------
1188: # calc_serial()
1189: #
1190: # Called with (up to) 2 parameters.
1191: # 1. Unix timestamp. If omitted, uses current time.
1192: # 2. GMT flag. Set to '1' to return serial in GMT.
1193: # If omitted, returns serial in appropriate timezone.
1194: #
1195: # Returns date/time serial according to $DATE_SYSTEM selected
1196: #-----------------------------------------------------------
1197: sub calc_serial {
1198: # Use 1900 date system on all platforms other than Apple Mac (for which
1199: # use 1904 date system).
1200: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1201: my $time = (defined $_[0]) ? $_[0] : time();
1202: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1203: #
1204: # Divide timestamp by number of seconds in a day.
1205: # This gives a date serial with '0' on 1 Jan 1970.
1206: my $serial = $time / 86400;
1207: #
1208: # Adjust the date serial by the offset appropriate to the
1209: # currently selected system (1900/1904).
1210: if ($DATE_SYSTEM == 0) { # use 1900 system
1211: $serial += 25569;
1212: } else { # use 1904 system
1213: $serial += 24107;
1214: }
1215: #
1216: unless ($gmtflag) {
1217: # Now have a 'raw' serial with the right offset. But this
1218: # gives a serial in GMT, which is false unless the timezone
1219: # is GMT. We need to adjust the serial by the appropriate
1220: # timezone offset.
1221: # Calculate the appropriate timezone offset by seeing what
1222: # the differences between localtime and gmtime for the given
1223: # time are.
1224: #
1225: my @gmtime = gmtime($time);
1226: my @ltime = localtime($time);
1227: #
1228: # For the first 7 elements of the two arrays, adjust the
1229: # date serial where the elements differ.
1230: for (0 .. 6) {
1231: my $diff = $ltime[$_] - $gmtime[$_];
1232: if ($diff) {
1233: $serial += _adjustment($diff,$_);
1234: }
1235: }
1236: }
1237: #
1238: # Perpetuate the error that 1900 was a leap year by decrementing
1239: # the serial if we're using the 1900 system and the date is prior to
1240: # 1 Mar 1900. This has the effect of making serial value '60'
1241: # 29 Feb 1900.
1242: #
1243: # This fix only has any effect if UNIX/Perl time on the platform
1244: # can represent 1900. Many can't.
1245: #
1246: unless ($DATE_SYSTEM) {
1247: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1248: }
1249: return $serial;
1250: }
1251:
1252: sub _adjustment {
1253: # Based on the difference in the localtime/gmtime array elements
1254: # number, return the adjustment required to the serial.
1255: #
1256: # We only look at some elements of the localtime/gmtime arrays:
1257: # seconds unlikely to be different as all known timezones
1258: # have an offset of integral multiples of 15 minutes,
1259: # but it's easy to do.
1260: # minutes will be different for timezone offsets which are
1261: # not an exact number of hours.
1262: # hours very likely to be different.
1263: # weekday will differ when localtime/gmtime difference
1264: # straddles midnight.
1265: #
1266: # Assume that difference between localtime and gmtime is less than
1267: # 5 days, then don't have to do maths for day of month, month number,
1268: # year number, etc...
1269: #
1270: my ($delta,$element) = @_;
1271: my $adjust = 0;
1272: #
1273: if ($element == 0) { # Seconds
1274: $adjust = $delta/86400; # 60 * 60 * 24
1275: } elsif ($element == 1) { # Minutes
1276: $adjust = $delta/1440; # 60 * 24
1277: } elsif ($element == 2) { # Hours
1278: $adjust = $delta/24; # 24
1279: } elsif ($element == 6) { # Day of week number
1280: # Catch difference straddling Sat/Sun in either direction
1281: $delta += 7 if ($delta < -4);
1282: $delta -= 7 if ($delta > 4);
1283: #
1284: $adjust = $delta;
1285: }
1286: return $adjust;
1287: }
1288:
1289: ###########################################################
1290: ###########################################################
1291:
1292: =pod
1293:
1294: =item get_problem_data
1295:
1296: Returns a data structure describing the problem.
1297:
1298: Inputs: $url
1299:
1300: Returns: %Partdata
1301:
1302: =cut
1303:
1304: ## note: we must force each foil and option to not begin or end with
1305: ## spaces as they are stored without such data.
1306: ##
1307: ###########################################################
1308: ###########################################################
1309: sub get_problem_data {
1310: my ($url) = @_;
1311: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1312: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1313: my %Answer;
1314: %Answer=&Apache::lonnet::str2hash($Answ);
1315: my %Partdata;
1316: foreach my $part (@{$Answer{'parts'}}) {
1317: while (my($key,$value) = each(%Answer)) {
1318: #
1319: # Logging code:
1320: if (0) {
1321: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1322: if (ref($value) eq 'ARRAY') {
1323: &Apache::lonnet::logthis(' @'.join(',',@$value));
1324: } else {
1325: &Apache::lonnet::logthis(' '.$value);
1326: }
1327: }
1328: # End of logging code
1329: next if ($key !~ /^\Q$part\E/);
1330: $key =~ s/^\Q$part\E\.//;
1331: if (ref($value) eq 'ARRAY') {
1332: if ($key eq 'options') {
1333: $Partdata{$part}->{'_Options'}=$value;
1334: } elsif ($key eq 'concepts') {
1335: $Partdata{$part}->{'_Concepts'}=$value;
1336: } elsif ($key eq 'items') {
1337: $Partdata{$part}->{'_Items'}=$value;
1338: } elsif ($key =~ /^concept\.(.*)$/) {
1339: my $concept = $1;
1340: foreach my $foil (@$value) {
1341: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1342: $concept;
1343: }
1344: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1345: $Partdata{$part}->{$key}=$value;
1346: }
1347: } else {
1348: if ($key=~ /^foil\.text\.(.*)$/) {
1349: my $foil = $1;
1350: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1351: $value =~ s/(\s*$|^\s*)//g;
1352: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1353: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1354: my $foil = $1;
1355: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1356: } elsif ($key eq 'answercomputed') {
1357: $Partdata{$part}->{'answercomputed'} = $value;
1358: }
1359: }
1360: }
1361: }
1362: # Further debugging code
1363: if (0) {
1364: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1365: &log_hash_ref(\%Partdata);
1366: }
1367: return %Partdata;
1368: }
1369:
1370: sub log_array_ref {
1371: my ($arrayref,$prefix) = @_;
1372: return if (ref($arrayref) ne 'ARRAY');
1373: if (! defined($prefix)) { $prefix = ''; };
1374: foreach my $v (@$arrayref) {
1375: if (ref($v) eq 'ARRAY') {
1376: &log_array_ref($v,$prefix.' ');
1377: } elsif (ref($v) eq 'HASH') {
1378: &log_hash_ref($v,$prefix.' ');
1379: } else {
1380: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1381: }
1382: }
1383: }
1384:
1385: sub log_hash_ref {
1386: my ($hashref,$prefix) = @_;
1387: return if (ref($hashref) ne 'HASH');
1388: if (! defined($prefix)) { $prefix = ''; };
1389: while (my ($k,$v) = each(%$hashref)) {
1390: if (ref($v) eq 'ARRAY') {
1391: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1392: &log_array_ref($v,$prefix.' ');
1393: } elsif (ref($v) eq 'HASH') {
1394: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1395: &log_hash_ref($v,$prefix.' ');
1396: } else {
1397: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1398: }
1399: }
1400: }
1401: ####################################################
1402: ####################################################
1403:
1404: =pod
1405:
1406: =item &limit_by_time()
1407:
1408: =cut
1409:
1410: ####################################################
1411: ####################################################
1412: sub limit_by_time_form {
1413: my $Starttime_form = '';
1414: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1415: ('limitby_startdate');
1416: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1417: ('limitby_enddate');
1418: if (! defined($endtime)) {
1419: $endtime = time;
1420: }
1421: if (! defined($starttime)) {
1422: $starttime = $endtime - 60*60*24*7;
1423: }
1424: my $state;
1425: if (&limit_by_time()) {
1426: $state = '';
1427: } else {
1428: $state = 'disabled';
1429: }
1430: my $startdateform = &Apache::lonhtmlcommon::date_setter
1431: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1432: my $enddateform = &Apache::lonhtmlcommon::date_setter
1433: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1434: my $Str;
1435: $Str .= '<script type="text/javascript" language="JavaScript">';
1436: $Str .= 'function toggle_limitby_activity(state) {';
1437: $Str .= ' if (state) {';
1438: $Str .= ' limitby_startdate_enable();';
1439: $Str .= ' limitby_enddate_enable();';
1440: $Str .= ' } else {';
1441: $Str .= ' limitby_startdate_disable();';
1442: $Str .= ' limitby_enddate_disable();';
1443: $Str .= ' }';
1444: $Str .= '}';
1445: $Str .= '</script>';
1446: $Str .= '<fieldset>';
1447: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1448: if (&limit_by_time()) {
1449: $timecheckbox .= 'checked="checked" ';
1450: }
1451: $timecheckbox .= 'onchange="javascript:toggle_limitby_activity(this.checked);" ';
1452: $timecheckbox .= ' />';
1453: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1454: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1455: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1456: $Str .= '</fieldset>';
1457: return $Str;
1458: }
1459:
1460: sub limit_by_time {
1461: if (exists($env{'form.limit_by_time'}) &&
1462: $env{'form.limit_by_time'} ne '' ) {
1463: return 1;
1464: } else {
1465: return 0;
1466: }
1467: }
1468:
1469: sub get_time_limits {
1470: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1471: ('limitby_startdate');
1472: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1473: ('limitby_enddate');
1474: return ($starttime,$endtime);
1475: }
1476:
1477: ####################################################
1478: ####################################################
1479:
1480: =pod
1481:
1482: =item &manage_caches
1483:
1484: Inputs: $r, apache request object
1485:
1486: Returns: An array of scalars containing html for buttons.
1487:
1488: =cut
1489:
1490: ####################################################
1491: ####################################################
1492: sub manage_caches {
1493: my ($r,$formname,$inputname,$update_message) = @_;
1494: &Apache::loncoursedata::clear_internal_caches();
1495: my $sectionkey =
1496: join(',',
1497: map {
1498: &escape($_);
1499: } sort(&Apache::lonstatistics::get_selected_sections())
1500: );
1501: my $statuskey = $Apache::lonstatistics::enrollment_status;
1502: if (exists($env{'form.ClearCache'}) ||
1503: exists($env{'form.updatecaches'}) ||
1504: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1505: (exists($env{'form.prevsection'}) &&
1506: $env{'form.prevsection'} ne $sectionkey) ||
1507: (exists($env{'form.prevenrollstatus'}) &&
1508: $env{'form.prevenrollstatus'} ne $statuskey)
1509: ) {
1510: if (defined($update_message)) {
1511: $r->print($update_message);
1512: }
1513: if (0) {
1514: &Apache::lonnet::logthis('Updating mysql student data caches');
1515: }
1516: &gather_full_student_data($r,$formname,$inputname);
1517: }
1518: #
1519: my @Buttons =
1520: ('<input type="submit" name="ClearCache" '.
1521: 'value="'.&mt('Clear Caches').'" />',
1522: '<input type="submit" name="updatecaches" '.
1523: 'value="'.&mt('Update Caches').'" />'.
1524: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1525: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1526: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1527: );
1528: #
1529: if (! exists($env{'form.firstrun'})) {
1530: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1531: } else {
1532: $r->print('<input type="hidden" name="firstrun" value="no" />');
1533: }
1534: #
1535: return @Buttons;
1536: }
1537:
1538: sub gather_full_student_data {
1539: my ($r,$formname,$inputname) = @_;
1540: my $status_type;
1541: if (defined($formname)) {
1542: $status_type = 'inline';
1543: } else {
1544: $status_type = 'popup';
1545: }
1546: my $c = $r->connection();
1547: #
1548: &Apache::loncoursedata::clear_internal_caches();
1549: #
1550: my @Students = @Apache::lonstatistics::Students;
1551: #
1552: # Open the progress window
1553: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@Students));
1554: #
1555: while (my $student = shift @Students) {
1556: return if ($c->aborted());
1557: my $status = &Apache::loncoursedata::ensure_current_full_data
1558: ($student->{'username'},$student->{'domain'},
1559: $env{'request.course.id'});
1560: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1561: &mt('last student'));
1562: }
1563: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1564: $r->rflush();
1565: return;
1566: }
1567:
1568: ####################################################
1569: ####################################################
1570:
1571: =pod
1572:
1573: =item &submission_report_form
1574:
1575: Input: The originating reportSelected value for the current stats page.
1576:
1577: Output: Scalar containing HTML with needed form elements and a link to
1578: the student submission reports page.
1579:
1580: =cut
1581:
1582: ####################################################
1583: ####################################################
1584: sub submission_report_form {
1585: my ($original_report) = @_;
1586: # Note: In the link below we change the reportSelected value. If
1587: # the user hits the 'back' button on the browser after getting their
1588: # student submissions report, this value may still be around. So we
1589: # output a script block to set it properly. If the $original_report
1590: # value is unset, you are just asking for trouble.
1591: if (! defined($original_report)) {
1592: &Apache::lonnet::logthis
1593: ('someone called lonstathelpers::submission_report_form without '.
1594: ' enough input.');
1595: }
1596: my $html = $/.
1597: '<script type="text/javascript" language="JavaScript">'.
1598: "document.Statistics.reportSelected.value='$original_report';".
1599: '</script>'.
1600: '<input type="hidden" name="correctans" value="true" />'.
1601: '<input type="hidden" name="prob_status" value="true" />'.
1602: '<input type="hidden" name="all_sub" value="true" />';
1603: my $output_selector = $/.'<select name="output">'.$/;
1604: foreach ('HTML','Excel','CSV') {
1605: $output_selector .= ' <option value="'.lc($_).'"';
1606: if ($env{'form.output'} eq lc($_)) {
1607: $output_selector .= ' selected ';
1608: }
1609: $output_selector .='>'.&mt($_).'</option>'.$/;
1610: }
1611: $output_selector .= '</select>'.$/;
1612: my $link = '<a href="javascript:'.
1613: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1614: 'document.Statistics.submit();">';
1615: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1616: $link,'</a>').$/;
1617: return $html
1618: }
1619:
1620: ####################################################
1621: ####################################################
1622:
1623: =pod
1624:
1625: =back
1626:
1627: =cut
1628:
1629: ####################################################
1630: ####################################################
1631:
1632: 1;
1633:
1634: __END__
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