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lonstathelpers.pm
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Fri Dec 29 21:47:11 2006 UTC (17 years, 5 months ago) by
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- BUG#5118 - analyzing numeircal problem was causing ISE
1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstathelpers.pm,v 1.54 2006/12/29 21:47:11 albertel 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->src,&escape($resource->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) = @_;
139: my $Str;
140: $Str = "\n<table>\n";
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 ';
162: }
163: my $title = $res->compTitle;
164: if (! defined($title) || $title eq '') {
165: ($title) = ($res->src =~ m:/([^/]*)$:);
166: }
167: $seq_str .= '<tr>'.
168: qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value" $checked /></td>}.
169: '<td><label for="'.$rb_count.'">'.$resptype.'</label></td>'.
170: '<td><label for="'.$rb_count.'">'.$title.'</label>';
171: if (scalar(@response_ids) > 1) {
172: $seq_str .= &mt('response').' '.$respid;
173: }
174: my $link = $res->src.'?symb='.
175: &escape($res->symb);
176: $seq_str .= (' 'x2).
177: qq{<a target="preview" href="$link">view</a>};
178: $seq_str .= "</td></tr>\n";
179: $rb_count++;
180: }
181: }
182: }
183: }
184: if ($seq_str ne '') {
185: $Str .= '<tr><td> </td>'.
186: '<td colspan="2"><b>'.$seq->compTitle.'</b></td>'.
187: "</tr>\n".$seq_str;
188: if (defined($sequence_addendum)) {
189: $Str .= '<tr>'.
190: ('<td> </td>'x2).
191: '<td align="right">'.$sequence_addendum.'</td>'.
192: "</tr>\n";
193: }
194: }
195: }
196: $Str .= "</table>\n";
197: return $Str;
198: }
199:
200: ####################################################
201: ####################################################
202:
203: =pod
204:
205: =item &MultipleProblemSelector($navmap,$selected,$inputname)
206:
207: Generate HTML with checkboxes for problem selection.
208:
209: Input:
210:
211: $navmap: a navmap object. If undef, navmaps will be called to create a
212: new object.
213:
214: $selected: Scalar, Array, or hash reference of currently selected items.
215:
216: $inputname: The name of the form elements to use for the checkboxs.
217:
218: Returns: A string containing html for a table which lists the sequences
219: and their contents. A checkbox is provided for each problem.
220:
221: =cut
222:
223: ####################################################
224: ####################################################
225: sub MultipleProblemSelector {
226: my ($navmap,$inputname,$formname)=@_;
227: my $cid = $env{'request.course.id'};
228: my $Str;
229: # Massage the input as needed.
230: if (! defined($navmap)) {
231: $navmap = Apache::lonnavmaps::navmap->new();
232: if (! defined($navmap)) {
233: $Str .=
234: '<h1>'.&mt('Error: cannot process course structure').'</h1>';
235: return $Str;
236: }
237: }
238: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
239: # Header
240: $Str .= <<"END";
241: <script language="JavaScript" type="text/javascript">
242: function checkall(value,seqid) {
243: for (i=0; i<document.forms.$formname.elements.length; i++) {
244: ele = document.forms.$formname.elements[i];
245: if (ele.name == '$inputname') {
246: if (seqid != null) {
247: itemid = document.forms.$formname.elements[i].id;
248: thing = itemid.split(':');
249: if (thing[0] == seqid) {
250: document.forms.$formname.elements[i].checked=value;
251: }
252: } else {
253: document.forms.$formname.elements[i].checked=value;
254: }
255: }
256: }
257: }
258: </script>
259: END
260: $Str .=
261: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
262: (' 'x4).
263: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
264: $Str .= $/.'<table>'.$/;
265: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
266: my $sequence_string;
267: my $seq_id = 0;
268: my @Accumulator = (&new_accumulator($env{'course.'.$cid.'.description'},
269: '',
270: '',
271: $seq_id++,
272: $inputname));
273: my @Sequence_Data;
274: while (my $curRes = $iterator->next()) {
275: if ($curRes == $iterator->END_MAP) {
276: if (ref($Accumulator[-1]) eq 'CODE') {
277: my $old_accumulator = pop(@Accumulator);
278: push(@Sequence_Data,&{$old_accumulator}());
279: }
280: } elsif ($curRes == $iterator->BEGIN_MAP) {
281: # Not much to do here.
282: }
283: next if (! ref($curRes));
284: if ($curRes->is_map) {
285: push(@Accumulator,&new_accumulator($curRes->compTitle,
286: $curRes->src,
287: $curRes->symb,
288: $seq_id++,
289: $inputname));
290: } elsif ($curRes->is_problem) {
291: if (@Accumulator && $Accumulator[-1] ne '') {
292: &{$Accumulator[-1]}($curRes,
293: exists($selected->{$curRes->symb}));
294: }
295: }
296: }
297: my $course_seq = pop(@Sequence_Data);
298: foreach my $seq ($course_seq,@Sequence_Data) {
299: #my $seq = pop(@Sequence_Data);
300: next if (! defined($seq) || ref($seq) ne 'HASH');
301: $Str.= '<tr><td colspan="2">'.
302: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
303: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
304: &mt('Select').'</a>'.(' 'x2).
305: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
306: &mt('Unselect').'</a>'.(' 'x2).
307: '</td></tr>'.$/;
308: $Str.= $seq->{'html'};
309: }
310: $Str .= '</table>'.$/;
311: return $Str;
312: }
313:
314: sub new_accumulator {
315: my ($title,$src,$symb,$seq_id,$inputname) = @_;
316: my $target;
317: my $item_id=0;
318: return
319: sub {
320: if (@_) {
321: my ($res,$checked) = @_;
322: $target.='<tr><td><label>'.
323: '<input type="checkbox" name="'.$inputname.'" ';
324: if ($checked) {
325: $target .= 'checked ';
326: }
327: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
328: $target.=
329: 'value="'.&escape($res->symb).'" />'.
330: ' '.$res->compTitle.'</label>'.
331: (' 'x2).'<a target="preview" '.
332: 'href="'.$res->src.'?symb='.
333: &escape($res->symb).'">view</a>'.
334: '</td></tr>'.$/;
335: } else {
336: if (defined($target)) {
337: return { title => $title,
338: symb => $symb,
339: src => $src,
340: id => $seq_id,
341: html => $target, };
342: }
343: return undef;
344: }
345: };
346: }
347:
348: sub get_selected_symbs {
349: my ($inputfield) = @_;
350: my $field = 'form.'.$inputfield;
351: my @symbs = (map {
352: &unescape($_);
353: } &Apache::loncommon::get_env_multiple($field));
354: return @symbs;
355: }
356:
357: ####################################################
358: ####################################################
359:
360: =pod
361:
362: =item &make_target_id($target)
363:
364: Inputs: Hash ref with the following entries:
365: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
366: $target->{'resptype'}.
367:
368: Returns: A string, suitable for a form parameter, which uniquely identifies
369: the problem, part, and response to do statistical analysis on.
370:
371: Used by Apache::lonstathelpers::ProblemSelector().
372:
373: =cut
374:
375: ####################################################
376: ####################################################
377: sub make_target_id {
378: my ($target) = @_;
379: my $id = &escape($target->{'symb'}).':'.
380: &escape($target->{'part'}).':'.
381: &escape($target->{'respid'}).':'.
382: &escape($target->{'resptype'});
383: return $id;
384: }
385:
386: ####################################################
387: ####################################################
388:
389: =pod
390:
391: =item &get_target_from_id($id)
392:
393: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
394:
395: Returns: A hash reference, $target, containing the following keys:
396: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
397: $target->{'resptype'}.
398:
399: =cut
400:
401: ####################################################
402: ####################################################
403: sub get_target_from_id {
404: my ($id) = @_;
405: if (! ref($id)) {
406: my ($symb,$part,$respid,$resptype) = split(':',$id);
407: return ({ symb => &unescape($symb),
408: part => &unescape($part),
409: respid => &unescape($respid),
410: resptype => &unescape($resptype)});
411: } elsif (ref($id) eq 'ARRAY') {
412: my @Return;
413: foreach my $selected (@$id) {
414: my ($symb,$part,$respid,$resptype) = split(':',$selected);
415: push(@Return,{ symb => &unescape($symb),
416: part => &unescape($part),
417: respid => &unescape($respid),
418: resptype => &unescape($resptype)});
419: }
420: return \@Return;
421: }
422: }
423:
424: ####################################################
425: ####################################################
426:
427: =pod
428:
429: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
430:
431: Determine the problem parts or responses preceeding and following the
432: current resource.
433:
434: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
435: $AcceptableResponseTypes, regular expression matching acceptable
436: response types,
437: $granularity, either 'part', 'response', 'part_survey', or 'part_task'
438:
439: Returns: three hash references, $prev, $curr, $next, which refer to the
440: preceeding, current, or following problem parts or responses, depending
441: on the value of $granularity. Values of undef indicate there is no
442: previous or next part/response. A value of undef for all three indicates
443: there was no match found to the current part/resource.
444:
445: The hash references contain the following keys:
446: symb, part, resource
447:
448: If $granularity eq 'response', the following ADDITIONAL keys will be present:
449: respid, resptype
450:
451: =cut
452:
453: ####################################################
454: ####################################################
455: sub get_prev_curr_next {
456: my ($target,$AcceptableResponseTypes,$granularity) = @_;
457: #
458: # Build an array with the data we need to search through
459: my @Resource;
460: my ($navmap,@sequences) =
461: &Apache::lonstatistics::selected_sequences_with_assessments('all');
462: return $navmap if (! ref($navmap));
463: foreach my $seq (@sequences) {
464: my @resources = &get_resources($navmap,$seq);
465: foreach my $res (@resources) {
466: foreach my $part (@{$res->parts}) {
467: if ($res->is_survey($part) && ($granularity eq 'part_survey')){
468: push (@Resource,
469: { symb => $res->symb,
470: part => $part,
471: resource => $res,
472: } );
473: } elsif ($res->is_task($part) && ($granularity eq 'part_task')){
474: push (@Resource,
475: { symb => $res->symb,
476: part => $part,
477: resource => $res,
478: } );
479: } elsif ($granularity eq 'part') {
480: push (@Resource,
481: { symb => $res->symb,
482: part => $part,
483: resource => $res,
484: } );
485: } elsif ($granularity eq 'response') {
486: my @response_ids = $res->responseIds($part);
487: my @response_types = $res->responseType($part);
488: for (my $i=0;
489: $i<scalar(@response_ids);
490: $i++){
491: my $respid = $response_ids[$i];
492: my $resptype = $response_types[$i];
493: next if ($resptype !~ m/$AcceptableResponseTypes/);
494: push (@Resource,
495: { symb => $res->symb,
496: part => $part,
497: respid => $respid,
498: resptype => $resptype,
499: resource => $res,
500: } );
501: }
502: }
503: }
504: }
505: }
506: #
507: # Get the index of the current situation
508: my $curr_idx;
509: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
510: my $curr_item = $Resource[$curr_idx];
511: if ($granularity =~ /^(part|part_survey|part_task)$/) {
512: if ($curr_item->{'symb'} eq $target->{'symb'} &&
513: $curr_item->{'part'} eq $target->{'part'}) {
514: last;
515: }
516: } elsif ($granularity eq 'response') {
517: if ($curr_item->{'symb'} eq $target->{'symb'} &&
518: $curr_item->{'part'} eq $target->{'part'} &&
519: $curr_item->{'respid'} eq $target->{'respid'} &&
520: $curr_item->{'resptype'} eq $target->{'resptype'}) {
521: last;
522: }
523: }
524: }
525: my $curr_item = $Resource[$curr_idx];
526: if ($granularity =~ /^(part|part_survey|part_task)$/) {
527: if ($curr_item->{'symb'} ne $target->{'symb'} ||
528: $curr_item->{'part'} ne $target->{'part'}) {
529: # bogus symb - return nothing
530: return (undef,undef,undef);
531: }
532: } elsif ($granularity eq 'response') {
533: if ($curr_item->{'symb'} ne $target->{'symb'} ||
534: $curr_item->{'part'} ne $target->{'part'} ||
535: $curr_item->{'respid'} ne $target->{'respid'} ||
536: $curr_item->{'resptype'} ne $target->{'resptype'}){
537: # bogus symb - return nothing
538: return (undef,undef,undef);
539: }
540: }
541: #
542: # Now just pick up the data we need
543: my ($prev,$curr,$next);
544: if ($curr_idx == 0) {
545: $prev = undef;
546: $curr = $Resource[$curr_idx ];
547: $next = $Resource[$curr_idx+1];
548: } elsif ($curr_idx == $#Resource) {
549: $prev = $Resource[$curr_idx-1];
550: $curr = $Resource[$curr_idx ];
551: $next = undef;
552: } else {
553: $prev = $Resource[$curr_idx-1];
554: $curr = $Resource[$curr_idx ];
555: $next = $Resource[$curr_idx+1];
556: }
557: return ($navmap,$prev,$curr,$next);
558: }
559:
560:
561: #####################################################
562: #####################################################
563:
564: =pod
565:
566: =item GetStudentAnswers($r,$problem,$Students)
567:
568: Determines the correct answer for a set of students on a given problem.
569: The students answers are stored in the student hashes pointed to by the
570: array @$Students under the key 'answer'.
571:
572: Inputs: $r
573: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
574: $Students: reference to array containing student hashes (need 'username',
575: 'domain').
576:
577: Returns: nothing
578:
579: =cut
580:
581: #####################################################
582: #####################################################
583: sub GetStudentAnswers {
584: my ($r,$problem,$Students,$formname,$inputname) = @_;
585: my %answers;
586: my $status_type;
587: if (defined($formname)) {
588: $status_type = 'inline';
589: } else {
590: $status_type = 'popup';
591: }
592: my $c = $r->connection();
593: my %Answers;
594: my ($resource,$partid,$respid) = ($problem->{'resource'},
595: $problem->{'part'},
596: $problem->{'respid'});
597: # Read in the cache (if it exists) before we start timing things.
598: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
599: # Open progress window
600: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
601: ($r,'Student Answer Compilation Status',
602: 'Student Answer Compilation Progress', scalar(@$Students),
603: $status_type,undef,$formname,$inputname);
604: $r->rflush();
605: foreach my $student (@$Students) {
606: last if ($c->aborted());
607: my $sname = $student->{'username'};
608: my $sdom = $student->{'domain'};
609: my $answer = &Apache::lonstathelpers::get_student_answer
610: ($resource,$sname,$sdom,$partid,$respid);
611: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
612: &mt('last student'));
613: $answers{$answer}++;
614: $student->{'answer'} = $answer;
615: }
616: &Apache::lonstathelpers::write_analysis_cache();
617: return if ($c->aborted());
618: $r->rflush();
619: # close progress window
620: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
621: return \%answers;
622: }
623:
624: #####################################################
625: #####################################################
626:
627: =pod
628:
629: =item analyze_problem_as_student
630:
631: Analyzes a homework problem for a student
632:
633: Inputs: $resource: a resource object
634: $sname, $sdom, $partid, $respid
635:
636: Returns: the problem analysis hash
637:
638: =cut
639:
640: #####################################################
641: #####################################################
642: sub analyze_problem_as_student {
643: my ($resource,$sname,$sdom) = @_;
644: if (ref($resource) ne 'HASH') {
645: my $res = $resource;
646: $resource = { 'src' => $res->src,
647: 'symb' => $res->symb,
648: 'parts' => $res->parts };
649: foreach my $part (@{$resource->{'parts'}}) {
650: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
651: [$res->responseIds($part)];
652: }
653: }
654: my $url = $resource->{'src'};
655: my $symb = $resource->{'symb'};
656: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
657: if (! defined($analysis)) {
658: my $courseid = $env{'request.course.id'};
659: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
660: 'grade_domain' => $sdom,
661: 'grade_username' => $sname,
662: 'grade_symb' => $symb,
663: 'grade_courseid' => $courseid));
664: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
665: &store_analysis($sname,$sdom,$symb,$analysis);
666: }
667: my %Answer=&Apache::lonnet::str2hash($analysis);
668: #
669: return \%Answer;
670: }
671:
672: #####################################################
673: #####################################################
674:
675: =pod
676:
677: =item get_student_answer
678:
679: Analyzes a homework problem for a particular student and returns the correct
680: answer. Attempts to put together an answer for problem types
681: that do not natively support it.
682:
683: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
684: $sname, $sdom, $partid, $respid
685:
686: Returns: $answer
687:
688: If $partid and $respid are specified, $answer is simply a scalar containing
689: the correct answer for the response.
690:
691: If $partid or $respid are undefined, $answer will be a hash reference with
692: keys $partid.'.'.$respid.'.answer'.
693:
694: =cut
695:
696: #####################################################
697: #####################################################
698: sub get_student_answer {
699: my ($resource,$sname,$sdom,$partid,$respid) = @_;
700: #
701: if (ref($resource) ne 'HASH') {
702: my $res = $resource;
703: $resource = { 'src' => $res->src,
704: 'symb' => $res->symb,
705: 'parts' => $res->parts };
706: foreach my $part (@{$resource->{'parts'}}) {
707: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
708: [$res->responseIds($part)];
709: }
710: }
711: #
712: my $analysis =
713: &analyze_problem_as_student($resource,$sname,$sdom);
714: my $answer;
715: foreach my $partid (@{$resource->{'parts'}}) {
716: my $partdata = $resource->{'partdata'}->{$partid};
717: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
718: my $prefix = $partid.'.'.$respid;
719: my $key = $prefix.'.answer';
720: $answer->{$partid}->{$respid} =
721: &get_answer($prefix,$key,%$analysis);
722: }
723: }
724: my $returnvalue;
725: if (! defined($partid)) {
726: $returnvalue = $answer;
727: } elsif (! defined($respid)) {
728: $returnvalue = $answer->{$partid};
729: } else {
730: $returnvalue = $answer->{$partid}->{$respid};
731: }
732: return $returnvalue;
733: }
734:
735: sub get_answer {
736: my ($prefix,$key,%Answer) = @_;
737: my $returnvalue;
738: if (exists($Answer{$key})) {
739: if (ref($Answer{$key}) eq 'HASH') {
740: my $which = 'INTERNAL';
741: if (!exists($Answer{$key}{$which})) {
742: $which = (sort(keys(%{ $Answer{$key} })))[0];
743: }
744: my $student_answer = $Answer{$key}{$which}[0][0];
745: $returnvalue = $student_answer;
746: } else {
747: &Apache::lonnet::logthis("error analyzing problem. got a answer of type ".ref($Answer{$key}));
748: }
749: } else {
750: if (exists($Answer{$prefix.'.shown'})) {
751: # The response has foils
752: my %values;
753: while (my ($k,$v) = each(%Answer)) {
754: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
755: my $foilname = $2;
756: $values{$foilname}=$v;
757: }
758: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
759: if (ref($values{$foil}) eq 'ARRAY') {
760: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
761: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
762: } else {
763: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
764: &HTML::Entities::encode($values{$foil},'<>&"').'&';
765: }
766: }
767: $returnvalue =~ s/ /\%20/g;
768: chop ($returnvalue);
769: }
770: }
771: return $returnvalue;
772: }
773:
774: #####################################################
775: #####################################################
776:
777: =pod
778:
779: =item Caching routines
780:
781: =over 4
782:
783: =item &load_analysis_cache($symb)
784:
785: Loads the cache for the given symb into memory from disk.
786: Requires the cache filename be set.
787: Only should be called by &ensure_proper_cache.
788:
789: =cut
790:
791: #####################################################
792: #####################################################
793: {
794: my $cache_filename = undef;
795: my $current_symb = undef;
796: my %cache;
797:
798: sub load_analysis_cache {
799: my ($symb) = @_;
800: return if (! defined($cache_filename));
801: if (! defined($current_symb) || $current_symb ne $symb) {
802: undef(%cache);
803: my $storedstring;
804: my %cache_db;
805: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
806: $storedstring = $cache_db{&escape($symb)};
807: untie(%cache_db);
808: }
809: if (defined($storedstring)) {
810: %cache = %{thaw($storedstring)};
811: }
812: }
813: return;
814: }
815:
816: #####################################################
817: #####################################################
818:
819: =pod
820:
821: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
822:
823: Returns the appropriate data from the cache, or undef if no data exists.
824:
825: =cut
826:
827: #####################################################
828: #####################################################
829: sub get_from_analysis_cache {
830: my ($sname,$sdom,$symb) = @_;
831: &ensure_proper_cache($symb);
832: my $returnvalue;
833: if (exists($cache{$sname.':'.$sdom})) {
834: $returnvalue = $cache{$sname.':'.$sdom};
835: } else {
836: $returnvalue = undef;
837: }
838: return $returnvalue;
839: }
840:
841: #####################################################
842: #####################################################
843:
844: =pod
845:
846: =item &write_analysis_cache($symb)
847:
848: Writes the in memory cache to disk so that it can be read in with
849: &load_analysis_cache($symb).
850:
851: =cut
852:
853: #####################################################
854: #####################################################
855: sub write_analysis_cache {
856: return if (! defined($current_symb) || ! defined($cache_filename));
857: my %cache_db;
858: my $key = &escape($current_symb);
859: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
860: my $storestring = freeze(\%cache);
861: $cache_db{$key}=$storestring;
862: $cache_db{$key.'.time'}=time;
863: untie(%cache_db);
864: }
865: undef(%cache);
866: undef($current_symb);
867: undef($cache_filename);
868: return;
869: }
870:
871: #####################################################
872: #####################################################
873:
874: =pod
875:
876: =item &ensure_proper_cache($symb)
877:
878: Called to make sure we have the proper cache set up. This is called
879: prior to every analysis lookup.
880:
881: =cut
882:
883: #####################################################
884: #####################################################
885: sub ensure_proper_cache {
886: my ($symb) = @_;
887: my $cid = $env{'request.course.id'};
888: my $new_filename = '/home/httpd/perl/tmp/'.
889: 'problemanalysis_'.$cid.'_analysis_cache.db';
890: if (! defined($cache_filename) ||
891: $cache_filename ne $new_filename ||
892: ! defined($current_symb) ||
893: $current_symb ne $symb) {
894: $cache_filename = $new_filename;
895: # Notice: $current_symb is not set to $symb until after the cache is
896: # loaded. This is what tells &load_analysis_cache to load in a new
897: # symb cache.
898: &load_analysis_cache($symb);
899: $current_symb = $symb;
900: }
901: }
902:
903: #####################################################
904: #####################################################
905:
906: =pod
907:
908: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
909:
910: Stores the analysis data in the in memory cache.
911:
912: =cut
913:
914: #####################################################
915: #####################################################
916: sub store_analysis {
917: my ($sname,$sdom,$symb,$dataset) = @_;
918: return if ($symb ne $current_symb);
919: $cache{$sname.':'.$sdom}=$dataset;
920: return;
921: }
922:
923: }
924: #####################################################
925: #####################################################
926:
927: =pod
928:
929: =back
930:
931: =cut
932:
933: #####################################################
934: #####################################################
935:
936: ##
937: ## The following is copied from datecalc1.pl, part of the
938: ## Spreadsheet::WriteExcel CPAN module.
939: ##
940: ##
941: ######################################################################
942: #
943: # Demonstration of writing date/time cells to Excel spreadsheets,
944: # using UNIX/Perl time as source of date/time.
945: #
946: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
947: #
948: ######################################################################
949: #
950: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
951: # measured in seconds.
952: #
953: # An Excel file can use exactly one of two different date/time systems.
954: # In these systems, a floating point number represents the number of days
955: # (and fractional parts of the day) since a start point. The floating point
956: # number is referred to as a 'serial'.
957: # The two systems ('1900' and '1904') use different starting points:
958: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
959: # a leap year - see:
960: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
961: # for the excuse^H^H^H^H^H^Hreason.
962: # '1904'; '1.00' is 2 Jan 1904.
963: #
964: # The '1904' system is the default for Apple Macs. Windows versions of
965: # Excel have the option to use the '1904' system.
966: #
967: # Note that Visual Basic's "DateSerial" function does NOT erroneously
968: # regard 1900 as a leap year, and thus its serials do not agree with
969: # the 1900 serials of Excel for dates before 1 Mar 1900.
970: #
971: # Note that StarOffice (at least at version 5.2) does NOT erroneously
972: # regard 1900 as a leap year, and thus its serials do not agree with
973: # the 1900 serials of Excel for dates before 1 Mar 1900.
974: #
975: ######################################################################
976: #
977: # Calculation description
978: # =======================
979: #
980: # 1900 system
981: # -----------
982: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
983: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
984: # were leap years with an extra day.
985: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
986: # 1 Jan 1970.
987: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
988: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
989: #
990: # 1904 system
991: # -----------
992: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
993: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
994: # were leap years with an extra day.
995: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
996: # 1 Jan 1970.
997: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
998: #
999: ######################################################################
1000: #
1001: # Copyright (c) 2000, Andrew Benham.
1002: # This program is free software. It may be used, redistributed and/or
1003: # modified under the same terms as Perl itself.
1004: #
1005: # Andrew Benham, adsb@bigfoot.com
1006: # London, United Kingdom
1007: # 11 Nov 2000
1008: #
1009: ######################################################################
1010: #-----------------------------------------------------------
1011: # calc_serial()
1012: #
1013: # Called with (up to) 2 parameters.
1014: # 1. Unix timestamp. If omitted, uses current time.
1015: # 2. GMT flag. Set to '1' to return serial in GMT.
1016: # If omitted, returns serial in appropriate timezone.
1017: #
1018: # Returns date/time serial according to $DATE_SYSTEM selected
1019: #-----------------------------------------------------------
1020: sub calc_serial {
1021: # Use 1900 date system on all platforms other than Apple Mac (for which
1022: # use 1904 date system).
1023: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1024: my $time = (defined $_[0]) ? $_[0] : time();
1025: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1026: #
1027: # Divide timestamp by number of seconds in a day.
1028: # This gives a date serial with '0' on 1 Jan 1970.
1029: my $serial = $time / 86400;
1030: #
1031: # Adjust the date serial by the offset appropriate to the
1032: # currently selected system (1900/1904).
1033: if ($DATE_SYSTEM == 0) { # use 1900 system
1034: $serial += 25569;
1035: } else { # use 1904 system
1036: $serial += 24107;
1037: }
1038: #
1039: unless ($gmtflag) {
1040: # Now have a 'raw' serial with the right offset. But this
1041: # gives a serial in GMT, which is false unless the timezone
1042: # is GMT. We need to adjust the serial by the appropriate
1043: # timezone offset.
1044: # Calculate the appropriate timezone offset by seeing what
1045: # the differences between localtime and gmtime for the given
1046: # time are.
1047: #
1048: my @gmtime = gmtime($time);
1049: my @ltime = localtime($time);
1050: #
1051: # For the first 7 elements of the two arrays, adjust the
1052: # date serial where the elements differ.
1053: for (0 .. 6) {
1054: my $diff = $ltime[$_] - $gmtime[$_];
1055: if ($diff) {
1056: $serial += _adjustment($diff,$_);
1057: }
1058: }
1059: }
1060: #
1061: # Perpetuate the error that 1900 was a leap year by decrementing
1062: # the serial if we're using the 1900 system and the date is prior to
1063: # 1 Mar 1900. This has the effect of making serial value '60'
1064: # 29 Feb 1900.
1065: #
1066: # This fix only has any effect if UNIX/Perl time on the platform
1067: # can represent 1900. Many can't.
1068: #
1069: unless ($DATE_SYSTEM) {
1070: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1071: }
1072: return $serial;
1073: }
1074:
1075: sub _adjustment {
1076: # Based on the difference in the localtime/gmtime array elements
1077: # number, return the adjustment required to the serial.
1078: #
1079: # We only look at some elements of the localtime/gmtime arrays:
1080: # seconds unlikely to be different as all known timezones
1081: # have an offset of integral multiples of 15 minutes,
1082: # but it's easy to do.
1083: # minutes will be different for timezone offsets which are
1084: # not an exact number of hours.
1085: # hours very likely to be different.
1086: # weekday will differ when localtime/gmtime difference
1087: # straddles midnight.
1088: #
1089: # Assume that difference between localtime and gmtime is less than
1090: # 5 days, then don't have to do maths for day of month, month number,
1091: # year number, etc...
1092: #
1093: my ($delta,$element) = @_;
1094: my $adjust = 0;
1095: #
1096: if ($element == 0) { # Seconds
1097: $adjust = $delta/86400; # 60 * 60 * 24
1098: } elsif ($element == 1) { # Minutes
1099: $adjust = $delta/1440; # 60 * 24
1100: } elsif ($element == 2) { # Hours
1101: $adjust = $delta/24; # 24
1102: } elsif ($element == 6) { # Day of week number
1103: # Catch difference straddling Sat/Sun in either direction
1104: $delta += 7 if ($delta < -4);
1105: $delta -= 7 if ($delta > 4);
1106: #
1107: $adjust = $delta;
1108: }
1109: return $adjust;
1110: }
1111:
1112: ###########################################################
1113: ###########################################################
1114:
1115: =pod
1116:
1117: =item get_problem_data
1118:
1119: Returns a data structure describing the problem.
1120:
1121: Inputs: $url
1122:
1123: Returns: %Partdata
1124:
1125: =cut
1126:
1127: ## note: we must force each foil and option to not begin or end with
1128: ## spaces as they are stored without such data.
1129: ##
1130: ###########################################################
1131: ###########################################################
1132: sub get_problem_data {
1133: my ($url) = @_;
1134: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1135: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1136: my %Answer;
1137: %Answer=&Apache::lonnet::str2hash($Answ);
1138: my %Partdata;
1139: foreach my $part (@{$Answer{'parts'}}) {
1140: while (my($key,$value) = each(%Answer)) {
1141: #
1142: # Logging code:
1143: if (0) {
1144: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1145: if (ref($value) eq 'ARRAY') {
1146: &Apache::lonnet::logthis(' @'.join(',',@$value));
1147: } else {
1148: &Apache::lonnet::logthis(' '.$value);
1149: }
1150: }
1151: # End of logging code
1152: next if ($key !~ /^\Q$part\E/);
1153: $key =~ s/^\Q$part\E\.//;
1154: if (ref($value) eq 'ARRAY') {
1155: if ($key eq 'options') {
1156: $Partdata{$part}->{'_Options'}=$value;
1157: } elsif ($key eq 'concepts') {
1158: $Partdata{$part}->{'_Concepts'}=$value;
1159: } elsif ($key eq 'items') {
1160: $Partdata{$part}->{'_Items'}=$value;
1161: } elsif ($key =~ /^concept\.(.*)$/) {
1162: my $concept = $1;
1163: foreach my $foil (@$value) {
1164: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1165: $concept;
1166: }
1167: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1168: $Partdata{$part}->{$key}=$value;
1169: }
1170: } else {
1171: if ($key=~ /^foil\.text\.(.*)$/) {
1172: my $foil = $1;
1173: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1174: $value =~ s/(\s*$|^\s*)//g;
1175: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1176: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1177: my $foil = $1;
1178: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1179: } elsif ($key eq 'answercomputed') {
1180: $Partdata{$part}->{'answercomputed'} = $value;
1181: }
1182: }
1183: }
1184: }
1185: # Further debugging code
1186: if (0) {
1187: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1188: &log_hash_ref(\%Partdata);
1189: }
1190: return %Partdata;
1191: }
1192:
1193: sub log_array_ref {
1194: my ($arrayref,$prefix) = @_;
1195: return if (ref($arrayref) ne 'ARRAY');
1196: if (! defined($prefix)) { $prefix = ''; };
1197: foreach my $v (@$arrayref) {
1198: if (ref($v) eq 'ARRAY') {
1199: &log_array_ref($v,$prefix.' ');
1200: } elsif (ref($v) eq 'HASH') {
1201: &log_hash_ref($v,$prefix.' ');
1202: } else {
1203: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1204: }
1205: }
1206: }
1207:
1208: sub log_hash_ref {
1209: my ($hashref,$prefix) = @_;
1210: return if (ref($hashref) ne 'HASH');
1211: if (! defined($prefix)) { $prefix = ''; };
1212: while (my ($k,$v) = each(%$hashref)) {
1213: if (ref($v) eq 'ARRAY') {
1214: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1215: &log_array_ref($v,$prefix.' ');
1216: } elsif (ref($v) eq 'HASH') {
1217: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1218: &log_hash_ref($v,$prefix.' ');
1219: } else {
1220: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1221: }
1222: }
1223: }
1224: ####################################################
1225: ####################################################
1226:
1227: =pod
1228:
1229: =item &limit_by_time()
1230:
1231: =cut
1232:
1233: ####################################################
1234: ####################################################
1235: sub limit_by_time_form {
1236: my $Starttime_form = '';
1237: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1238: ('limitby_startdate');
1239: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1240: ('limitby_enddate');
1241: if (! defined($endtime)) {
1242: $endtime = time;
1243: }
1244: if (! defined($starttime)) {
1245: $starttime = $endtime - 60*60*24*7;
1246: }
1247: my $state;
1248: if (&limit_by_time()) {
1249: $state = '';
1250: } else {
1251: $state = 'disabled';
1252: }
1253: my $startdateform = &Apache::lonhtmlcommon::date_setter
1254: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1255: my $enddateform = &Apache::lonhtmlcommon::date_setter
1256: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1257: my $Str;
1258: $Str .= '<script language="Javascript" >';
1259: $Str .= 'function toggle_limitby_activity(state) {';
1260: $Str .= ' if (state) {';
1261: $Str .= ' limitby_startdate_enable();';
1262: $Str .= ' limitby_enddate_enable();';
1263: $Str .= ' } else {';
1264: $Str .= ' limitby_startdate_disable();';
1265: $Str .= ' limitby_enddate_disable();';
1266: $Str .= ' }';
1267: $Str .= '}';
1268: $Str .= '</script>';
1269: $Str .= '<fieldset>';
1270: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1271: if (&limit_by_time()) {
1272: $timecheckbox .= ' checked ';
1273: }
1274: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1275: $timecheckbox .= ' />';
1276: $Str .= '<legend><label>'.&mt('[_1] Limit by time',$timecheckbox).'</label></legend>';
1277: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1278: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1279: $Str .= '</fieldset>';
1280: return $Str;
1281: }
1282:
1283: sub limit_by_time {
1284: if (exists($env{'form.limit_by_time'}) &&
1285: $env{'form.limit_by_time'} ne '' ) {
1286: return 1;
1287: } else {
1288: return 0;
1289: }
1290: }
1291:
1292: sub get_time_limits {
1293: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1294: ('limitby_startdate');
1295: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1296: ('limitby_enddate');
1297: return ($starttime,$endtime);
1298: }
1299:
1300: ####################################################
1301: ####################################################
1302:
1303: =pod
1304:
1305: =item &manage_caches
1306:
1307: Inputs: $r, apache request object
1308:
1309: Returns: An array of scalars containing html for buttons.
1310:
1311: =cut
1312:
1313: ####################################################
1314: ####################################################
1315: sub manage_caches {
1316: my ($r,$formname,$inputname,$update_message) = @_;
1317: &Apache::loncoursedata::clear_internal_caches();
1318: my $sectionkey =
1319: join(',',
1320: map {
1321: &escape($_);
1322: } sort(&Apache::lonstatistics::get_selected_sections())
1323: );
1324: my $statuskey = $Apache::lonstatistics::enrollment_status;
1325: if (exists($env{'form.ClearCache'}) ||
1326: exists($env{'form.updatecaches'}) ||
1327: (exists($env{'form.firstrun'}) && $env{'form.firstrun'} ne 'no') ||
1328: (exists($env{'form.prevsection'}) &&
1329: $env{'form.prevsection'} ne $sectionkey) ||
1330: (exists($env{'form.prevenrollstatus'}) &&
1331: $env{'form.prevenrollstatus'} ne $statuskey)
1332: ) {
1333: if (defined($update_message)) {
1334: $r->print($update_message);
1335: }
1336: if (0) {
1337: &Apache::lonnet::logthis('Updating mysql student data caches');
1338: }
1339: &gather_full_student_data($r,$formname,$inputname);
1340: }
1341: #
1342: my @Buttons =
1343: ('<input type="submit" name="ClearCache" '.
1344: 'value="'.&mt('Clear Caches').'" />',
1345: '<input type="submit" name="updatecaches" '.
1346: 'value="'.&mt('Update Caches').'" />'.
1347: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1348: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1349: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1350: );
1351: #
1352: if (! exists($env{'form.firstrun'})) {
1353: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1354: } else {
1355: $r->print('<input type="hidden" name="firstrun" value="no" />');
1356: }
1357: #
1358: return @Buttons;
1359: }
1360:
1361: sub gather_full_student_data {
1362: my ($r,$formname,$inputname) = @_;
1363: my $status_type;
1364: if (defined($formname)) {
1365: $status_type = 'inline';
1366: } else {
1367: $status_type = 'popup';
1368: }
1369: my $c = $r->connection();
1370: #
1371: &Apache::loncoursedata::clear_internal_caches();
1372: #
1373: my @Students = @Apache::lonstatistics::Students;
1374: #
1375: # Open the progress window
1376: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
1377: ($r,&mt('Student Data Compilation Status'),
1378: &mt('Student Data Compilation Progress'), scalar(@Students),
1379: $status_type,undef,$formname,$inputname);
1380: #
1381: while (my $student = shift @Students) {
1382: return if ($c->aborted());
1383: my $status = &Apache::loncoursedata::ensure_current_full_data
1384: ($student->{'username'},$student->{'domain'},
1385: $env{'request.course.id'});
1386: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1387: &mt('last student'));
1388: }
1389: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1390: $r->rflush();
1391: return;
1392: }
1393:
1394: ####################################################
1395: ####################################################
1396:
1397: =pod
1398:
1399: =item &submission_report_form
1400:
1401: Input: The originating reportSelected value for the current stats page.
1402:
1403: Output: Scalar containing HTML with needed form elements and a link to
1404: the student submission reports page.
1405:
1406: =cut
1407:
1408: ####################################################
1409: ####################################################
1410: sub submission_report_form {
1411: my ($original_report) = @_;
1412: # Note: In the link below we change the reportSelected value. If
1413: # the user hits the 'back' button on the browser after getting their
1414: # student submissions report, this value may still be around. So we
1415: # output a script block to set it properly. If the $original_report
1416: # value is unset, you are just asking for trouble.
1417: if (! defined($original_report)) {
1418: &Apache::lonnet::logthis
1419: ('someone called lonstathelpers::submission_report_form without '.
1420: ' enough input.');
1421: }
1422: my $html = $/.
1423: '<script type="Text/JavaScript">'.
1424: "document.Statistics.reportSelected.value='$original_report';".
1425: '</script>'.
1426: '<input type="hidden" name="correctans" value="true" />'.
1427: '<input type="hidden" name="prob_status" value="true" />'.
1428: '<input type="hidden" name="all_sub" value="true" />';
1429: my $output_selector = $/.'<select name="output">'.$/;
1430: foreach ('HTML','Excel','CSV') {
1431: $output_selector .= ' <option value="'.lc($_).'"';
1432: if ($env{'form.output'} eq lc($_)) {
1433: $output_selector .= ' selected ';
1434: }
1435: $output_selector .='>'.&mt($_).'</option>'.$/;
1436: }
1437: $output_selector .= '</select>'.$/;
1438: my $link = '<a href="javascript:'.
1439: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1440: 'document.Statistics.submit();">';
1441: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1442: $link,'</a>').$/;
1443: return $html
1444: }
1445:
1446: ####################################################
1447: ####################################################
1448:
1449: =pod
1450:
1451: =back
1452:
1453: =cut
1454:
1455: ####################################################
1456: ####################################################
1457:
1458: 1;
1459:
1460: __END__
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