Annotation of loncom/interface/statistics/lonstathelpers.pm, revision 1.29
1.1 matthew 1: # The LearningOnline Network with CAPA
2: #
1.29 ! matthew 3: # $Id: lonstathelpers.pm,v 1.28 2004/10/04 19:11:38 matthew Exp $
1.1 matthew 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();
1.8 matthew 61: use GDBM_File;
62: use Storable qw(freeze thaw);
1.1 matthew 63:
64: ####################################################
65: ####################################################
66:
67: =pod
68:
69: =item &render_resource($resource)
70:
71: Input: a resource generated from
72: &Apache::loncoursedata::get_sequence_assessment_data().
73:
74: Retunrs: a scalar containing html for a rendering of the problem
75: within a table.
76:
77: =cut
78:
79: ####################################################
80: ####################################################
81: sub render_resource {
82: my ($resource) = @_;
83: ##
84: ## Render the problem
85: my $base;
86: ($base,undef) = ($resource->{'src'} =~ m|(.*/)[^/]*$|);
87: $base = "http://".$ENV{'SERVER_NAME'}.$base;
88: my $rendered_problem =
89: &Apache::lonnet::ssi_body($resource->{'src'});
90: $rendered_problem =~ s/<\s*form\s*/<nop /g;
91: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
92: return '<table bgcolor="ffffff"><tr><td>'.
93: '<base href="'.$base.'" />'.
94: $rendered_problem.
95: '</td></tr></table>';
96: }
1.2 matthew 97:
98: ####################################################
99: ####################################################
100:
101: =pod
102:
103: =item &ProblemSelector($AcceptedResponseTypes)
104:
105: Input: scalar containing regular expression which matches response
106: types to show. '.' will yield all, '(option|radiobutton)' will match
107: all option response and radiobutton problems.
108:
109: Returns: A string containing html for a table which lists the sequences
110: and their contents. A radiobutton is provided for each problem.
1.14 matthew 111: Skips 'survey' problems.
1.2 matthew 112:
113: =cut
114:
115: ####################################################
116: ####################################################
117: sub ProblemSelector {
118: my ($AcceptedResponseTypes) = @_;
119: my $Str;
120: $Str = "\n<table>\n";
1.27 matthew 121: my $rb_count =0;
1.12 matthew 122: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess('all')) {
1.2 matthew 123: next if ($seq->{'num_assess'}<1);
124: my $seq_str = '';
125: foreach my $res (@{$seq->{'contents'}}) {
126: next if ($res->{'type'} ne 'assessment');
127: foreach my $part (@{$res->{'parts'}}) {
128: my $partdata = $res->{'partdata'}->{$part};
129: for (my $i=0;$i<scalar(@{$partdata->{'ResponseTypes'}});$i++){
130: my $respid = $partdata->{'ResponseIds'}->[$i];
131: my $resptype = $partdata->{'ResponseTypes'}->[$i];
132: if ($resptype =~ m/$AcceptedResponseTypes/) {
133: my $value = &make_target_id({symb=>$res->{'symb'},
134: part=>$part,
135: respid=>$respid,
136: resptype=>$resptype});
137: my $checked = '';
138: if ($ENV{'form.problemchoice'} eq $value) {
139: $checked = 'checked ';
140: }
141: my $title = $res->{'title'};
142: if (! defined($title) || $title eq '') {
143: ($title) = ($res->{'src'} =~ m:/([^/]*)$:);
144: }
1.27 matthew 145: $seq_str .= '<tr>'.
146: qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value" $checked /></td>}.
147: '<td><label for="'.$rb_count.'">'.$resptype.'</label></td>'.
148: '<td><label for="'.$rb_count.'">'.$title.'</label>';
1.5 matthew 149: if (scalar(@{$partdata->{'ResponseIds'}}) > 1) {
1.2 matthew 150: $seq_str .= &mt('response').' '.$respid;
151: }
1.27 matthew 152: $seq_str .= (' 'x2).
153: qq{<a target="preview" href="$res->{'src'}">view</a>};
1.2 matthew 154: $seq_str .= "</td></tr>\n";
1.27 matthew 155: $rb_count++;
1.2 matthew 156: }
157: }
158: }
159: }
160: if ($seq_str ne '') {
161: $Str .= '<tr><td> </td><td colspan="2"><b>'.$seq->{'title'}.'</b></td>'.
162: "</tr>\n".$seq_str;
163: }
164: }
165: $Str .= "</table>\n";
166: return $Str;
167: }
168:
169: ####################################################
170: ####################################################
171:
172: =pod
173:
1.24 matthew 174: =item &MultipleProblemSelector($navmap,$selected,$inputname)
1.21 matthew 175:
176: Generate HTML with checkboxes for problem selection.
177:
178: Input:
179:
180: $navmap: a navmap object. If undef, navmaps will be called to create a
181: new object.
182:
183: $selected: Scalar, Array, or hash reference of currently selected items.
184:
185: $inputname: The name of the form elements to use for the checkboxs.
186:
187: Returns: A string containing html for a table which lists the sequences
188: and their contents. A checkbox is provided for each problem.
189:
190: =cut
191:
192: ####################################################
193: ####################################################
194: sub MultipleProblemSelector {
1.23 matthew 195: my ($navmap,$inputname,$formname)=@_;
1.21 matthew 196: my $cid = $ENV{'request.course.id'};
197: my $Str;
198: # Massage the input as needed.
199: if (! defined($navmap)) {
200: $navmap = Apache::lonnavmaps::navmap->new();
201: if (! defined($navmap)) {
202: $Str .=
203: '<h1>'.&mt('Error: cannot process course structure').'</h1>';
204: return $Str;
205: }
206: }
207: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
208: # Header
209: $Str .= <<"END";
1.25 matthew 210: <script language="JavaScript" type="text/javascript">
211: function checkall(value,seqid) {
1.21 matthew 212: for (i=0; i<document.forms.$formname.elements.length; i++) {
213: ele = document.forms.$formname.elements[i];
214: if (ele.name == '$inputname') {
1.25 matthew 215: if (seqid != null) {
216: itemid = document.forms.$formname.elements[i].id;
217: thing = itemid.split(':');
218: if (thing[0] == seqid) {
219: document.forms.$formname.elements[i].checked=value;
220: }
221: } else {
222: document.forms.$formname.elements[i].checked=value;
223: }
1.21 matthew 224: }
225: }
226: }
227: </script>
228: END
229: $Str .=
230: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
231: (' 'x4).
232: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
233: $Str .= $/.'<table>'.$/;
234: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
235: my $sequence_string;
1.25 matthew 236: my $seq_id = 0;
1.21 matthew 237: my @Accumulator = (&new_accumulator($ENV{'course.'.$cid.'.description'},
238: '',
239: '',
1.25 matthew 240: $seq_id++,
1.21 matthew 241: $inputname));
242: my @Sequence_Data;
243: while (my $curRes = $iterator->next()) {
244: if ($curRes == $iterator->END_MAP) {
245: if (ref($Accumulator[-1]) eq 'CODE') {
1.24 matthew 246: my $old_accumulator = pop(@Accumulator);
247: push(@Sequence_Data,&{$old_accumulator}());
1.21 matthew 248: }
249: } elsif ($curRes == $iterator->BEGIN_MAP) {
250: # Not much to do here.
251: }
252: next if (! ref($curRes));
253: if ($curRes->is_map) {
1.24 matthew 254: push(@Accumulator,&new_accumulator($curRes->compTitle,
1.21 matthew 255: $curRes->src,
256: $curRes->symb,
1.25 matthew 257: $seq_id++,
1.21 matthew 258: $inputname));
259: } elsif ($curRes->is_problem) {
260: if (@Accumulator && $Accumulator[-1] ne '') {
261: &{$Accumulator[-1]}($curRes,
262: exists($selected->{$curRes->symb}));
263: }
264: }
265: }
266: my $course_seq = pop(@Sequence_Data);
267: foreach my $seq ($course_seq,@Sequence_Data) {
268: #my $seq = pop(@Sequence_Data);
269: next if (! defined($seq) || ref($seq) ne 'HASH');
270: $Str.= '<tr><td colspan="2">'.
1.25 matthew 271: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
272: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
273: &mt('Select').'</a>'.(' 'x2).
274: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
275: &mt('Unselect').'</a>'.(' 'x2).
1.21 matthew 276: '</td></tr>'.$/;
277: $Str.= $seq->{'html'};
278: }
279: $Str .= '</table>'.$/;
280: return $Str;
281: }
282:
283: sub get_title {
284: my ($title,$src) = @_;
285: if ($title eq '') {
286: ($title) = ($src =~ m|/([^/]+)$|);
287: } else {
288: $title =~ s/\:/:/g;
289: }
290: return $title;
291: }
292:
293: sub new_accumulator {
1.25 matthew 294: my ($title,$src,$symb,$seq_id,$inputname) = @_;
1.21 matthew 295: my $target;
1.25 matthew 296: my $item_id=0;
1.21 matthew 297: return
298: sub {
299: if (@_) {
300: my ($res,$checked) = @_;
1.23 matthew 301: $target.='<tr><td><label>'.
1.21 matthew 302: '<input type="checkbox" name="'.$inputname.'" ';
303: if ($checked) {
304: $target .= 'checked ';
305: }
1.25 matthew 306: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
1.21 matthew 307: $target.=
308: 'value="'.&Apache::lonnet::escape($res->symb).'" />'.
1.26 matthew 309: ' '.$res->compTitle.'</label>'.
310: (' 'x2).'<a target="preview" '.
311: 'href="'.$res->src.'">view</a>'.
312: '</td></tr>'.$/;
1.21 matthew 313: } else {
314: if (defined($target)) {
315: return { title => $title,
316: symb => $symb,
317: src => $src,
1.25 matthew 318: id => $seq_id,
1.21 matthew 319: html => $target, };
320: }
321: return undef;
322: }
323: };
324: }
325:
326: sub get_selected_symbs {
327: my ($inputfield) = @_;
328: my $field = 'form.'.$inputfield;
329: my @Symbs;
330: if (exists($ENV{$field})) {
331: if (! ref($ENV{$field})) {
332: @Symbs = (&Apache::lonnet::unescape($ENV{$field}));
333: } else {
334: @Symbs = (map {&Apache::lonnet::unescape($_);} @{$ENV{$field}});
335: }
336: }
337: return @Symbs;
338: }
339:
340: ####################################################
341: ####################################################
342:
343: =pod
344:
1.2 matthew 345: =item &make_target_id($target)
346:
347: Inputs: Hash ref with the following entries:
348: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
349: $target->{'resptype'}.
350:
351: Returns: A string, suitable for a form parameter, which uniquely identifies
352: the problem, part, and response to do statistical analysis on.
353:
354: Used by Apache::lonstathelpers::ProblemSelector().
355:
356: =cut
357:
358: ####################################################
359: ####################################################
360: sub make_target_id {
361: my ($target) = @_;
362: my $id = &Apache::lonnet::escape($target->{'symb'}).':'.
363: &Apache::lonnet::escape($target->{'part'}).':'.
364: &Apache::lonnet::escape($target->{'respid'}).':'.
365: &Apache::lonnet::escape($target->{'resptype'});
366: return $id;
367: }
368:
369: ####################################################
370: ####################################################
371:
372: =pod
373:
374: =item &get_target_from_id($id)
375:
376: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
377:
378: Returns: A hash reference, $target, containing the following keys:
379: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
380: $target->{'resptype'}.
381:
382: =cut
383:
384: ####################################################
385: ####################################################
386: sub get_target_from_id {
387: my ($id) = @_;
1.21 matthew 388: if (! ref($id)) {
389: my ($symb,$part,$respid,$resptype) = split(':',$id);
390: return ({ symb => &Apache::lonnet::unescape($symb),
391: part => &Apache::lonnet::unescape($part),
392: respid => &Apache::lonnet::unescape($respid),
393: resptype => &Apache::lonnet::unescape($resptype)});
394: } elsif (ref($id) eq 'ARRAY') {
395: my @Return;
396: foreach my $selected (@$id) {
397: my ($symb,$part,$respid,$resptype) = split(':',$selected);
398: push(@Return,{ symb => &Apache::lonnet::unescape($symb),
399: part => &Apache::lonnet::unescape($part),
400: respid => &Apache::lonnet::unescape($respid),
401: resptype => &Apache::lonnet::unescape($resptype)});
402: }
403: return \@Return;
404: }
1.2 matthew 405: }
406:
407: ####################################################
408: ####################################################
409:
410: =pod
411:
1.13 matthew 412: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
1.2 matthew 413:
414: Determine the problem parts or responses preceeding and following the
415: current resource.
416:
417: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
418: $AcceptableResponseTypes, regular expression matching acceptable
419: response types,
1.13 matthew 420: $granularity, either 'part', 'response', or 'part_survey'
1.2 matthew 421:
422: Returns: three hash references, $prev, $curr, $next, which refer to the
423: preceeding, current, or following problem parts or responses, depending
424: on the value of $granularity. Values of undef indicate there is no
425: previous or next part/response. A value of undef for all three indicates
426: there was no match found to the current part/resource.
427:
428: The hash references contain the following keys:
429: symb, part, resource
430:
431: If $granularity eq 'response', the following ADDITIONAL keys will be present:
432: respid, resptype
433:
434: =cut
435:
436: ####################################################
437: ####################################################
438: sub get_prev_curr_next {
439: my ($target,$AcceptableResponseTypes,$granularity) = @_;
440: #
441: # Build an array with the data we need to search through
442: my @Resource;
1.12 matthew 443: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess('all')) {
1.2 matthew 444: foreach my $res (@{$seq->{'contents'}}) {
445: next if ($res->{'type'} ne 'assessment');
446: foreach my $part (@{$res->{'parts'}}) {
447: my $partdata = $res->{'partdata'}->{$part};
1.20 matthew 448: if ($partdata->{'Survey'} && ($granularity eq 'part_survey')){
449: push (@Resource,
450: { symb => $res->{symb},
451: part => $part,
452: resource => $res,
453: } );
1.13 matthew 454: } elsif ($granularity eq 'part') {
1.2 matthew 455: push (@Resource,
456: { symb => $res->{symb},
457: part => $part,
458: resource => $res,
459: } );
460: } elsif ($granularity eq 'response') {
461: for (my $i=0;
462: $i<scalar(@{$partdata->{'ResponseTypes'}});
463: $i++){
464: my $respid = $partdata->{'ResponseIds'}->[$i];
465: my $resptype = $partdata->{'ResponseTypes'}->[$i];
466: next if ($resptype !~ m/$AcceptableResponseTypes/);
467: push (@Resource,
468: { symb => $res->{symb},
469: part => $part,
470: respid => $partdata->{'ResponseIds'}->[$i],
471: resource => $res,
472: resptype => $resptype
473: } );
474: }
475: }
476: }
477: }
478: }
479: #
480: # Get the index of the current situation
481: my $curr_idx;
482: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
483: my $curr_item = $Resource[$curr_idx];
1.13 matthew 484: if ($granularity eq 'part' || $granularity eq 'part_survey') {
1.2 matthew 485: if ($curr_item->{'symb'} eq $target->{'symb'} &&
486: $curr_item->{'part'} eq $target->{'part'}) {
487: last;
488: }
489: } elsif ($granularity eq 'response') {
490: if ($curr_item->{'symb'} eq $target->{'symb'} &&
491: $curr_item->{'part'} eq $target->{'part'} &&
492: $curr_item->{'respid'} eq $target->{'respid'} &&
493: $curr_item->{'resptype'} eq $target->{'resptype'}) {
494: last;
495: }
496: }
497: }
498: my $curr_item = $Resource[$curr_idx];
1.13 matthew 499: if ($granularity eq 'part' || $granularity eq 'part_survey') {
1.2 matthew 500: if ($curr_item->{'symb'} ne $target->{'symb'} ||
501: $curr_item->{'part'} ne $target->{'part'}) {
502: # bogus symb - return nothing
503: return (undef,undef,undef);
504: }
505: } elsif ($granularity eq 'response') {
506: if ($curr_item->{'symb'} ne $target->{'symb'} ||
507: $curr_item->{'part'} ne $target->{'part'} ||
508: $curr_item->{'respid'} ne $target->{'respid'} ||
509: $curr_item->{'resptype'} ne $target->{'resptype'}){
510: # bogus symb - return nothing
511: return (undef,undef,undef);
512: }
513: }
514: #
515: # Now just pick up the data we need
516: my ($prev,$curr,$next);
517: if ($curr_idx == 0) {
518: $prev = undef;
519: $curr = $Resource[$curr_idx ];
520: $next = $Resource[$curr_idx+1];
521: } elsif ($curr_idx == $#Resource) {
522: $prev = $Resource[$curr_idx-1];
523: $curr = $Resource[$curr_idx ];
524: $next = undef;
525: } else {
526: $prev = $Resource[$curr_idx-1];
527: $curr = $Resource[$curr_idx ];
528: $next = $Resource[$curr_idx+1];
529: }
530: return ($prev,$curr,$next);
1.4 matthew 531: }
532:
1.9 matthew 533:
534: #####################################################
535: #####################################################
536:
537: =pod
538:
539: =item GetStudentAnswers($r,$problem,$Students)
540:
541: Determines the correct answer for a set of students on a given problem.
542: The students answers are stored in the student hashes pointed to by the
543: array @$Students under the key 'answer'.
544:
545: Inputs: $r
546: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
547: $Students: reference to array containing student hashes (need 'username',
548: 'domain').
549:
550: Returns: nothing
551:
552: =cut
553:
554: #####################################################
555: #####################################################
556: sub GetStudentAnswers {
1.12 matthew 557: my ($r,$problem,$Students,$formname,$inputname) = @_;
558: my $status_type;
559: if (defined($formname)) {
560: $status_type = 'inline';
561: } else {
562: $status_type = 'popup';
563: }
1.9 matthew 564: my $c = $r->connection();
565: my %Answers;
566: my ($resource,$partid,$respid) = ($problem->{'resource'},
567: $problem->{'part'},
568: $problem->{'respid'});
569: # Read in the cache (if it exists) before we start timing things.
570: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
571: # Open progress window
572: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
573: ($r,'Student Answer Compilation Status',
1.12 matthew 574: 'Student Answer Compilation Progress', scalar(@$Students),
575: $status_type,undef,$formname,$inputname);
1.9 matthew 576: $r->rflush();
577: foreach my $student (@$Students) {
578: last if ($c->aborted());
579: my $sname = $student->{'username'};
580: my $sdom = $student->{'domain'};
581: my $answer = &Apache::lonstathelpers::analyze_problem_as_student
582: ($resource,$sname,$sdom,$partid,$respid);
583: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
584: &mt('last student'));
585: $student->{'answer'} = $answer;
586: }
1.29 ! matthew 587: &Apache::lonstathelpers::write_analysis_cache();
1.9 matthew 588: return if ($c->aborted());
589: $r->rflush();
590: # close progress window
591: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
592: return;
593: }
1.4 matthew 594:
595: #####################################################
596: #####################################################
597:
598: =pod
599:
600: =item analyze_problem_as_student
601:
602: Analyzes a homework problem for a student and returns the correct answer
603: for the student. Attempts to put together an answer for problem types
604: that do not natively support it.
605:
606: Inputs: $resource: a resource object
607: $sname, $sdom, $partid, $respid
608:
609: Returns: $answer
610:
1.6 matthew 611: If $partid and $respid are specified, $answer is simply a scalar containing
612: the correct answer for the response.
613:
614: If $partid or $respid are undefined, $answer will be a hash reference with
615: keys $partid.'.'.$respid.'.answer'.
616:
1.4 matthew 617: =cut
618:
619: #####################################################
620: #####################################################
621: sub analyze_problem_as_student {
622: my ($resource,$sname,$sdom,$partid,$respid) = @_;
1.22 matthew 623: if (ref($resource) ne 'HASH') {
624: my $res = $resource;
625: $resource = { 'src' => $res->src,
626: 'symb' => $res->symb,
627: 'parts' => $res->parts };
628: foreach my $part (@{$resource->{'parts'}}) {
629: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
630: [$res->responseIds($part)];
631: }
632: }
1.4 matthew 633: my $returnvalue;
634: my $url = $resource->{'src'};
635: my $symb = $resource->{'symb'};
1.29 ! matthew 636: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
! 637: if (! defined($analysis)) {
! 638: &Apache::lonnet::logthis('uncached analysis');
! 639: my $courseid = $ENV{'request.course.id'};
! 640: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
! 641: 'grade_domain' => $sdom,
! 642: 'grade_username' => $sname,
! 643: 'grade_symb' => $symb,
! 644: 'grade_courseid' => $courseid));
! 645: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
! 646: &store_analysis($sname,$sdom,$symb,$analysis);
! 647: }
! 648: my %Answer=&Apache::lonnet::str2hash($analysis);
1.6 matthew 649: #
1.29 ! matthew 650: my $answer;
1.8 matthew 651: foreach my $partid (@{$resource->{'parts'}}) {
1.6 matthew 652: my $partdata = $resource->{'partdata'}->{$partid};
653: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
654: my $prefix = $partid.'.'.$respid;
655: my $key = $prefix.'.answer';
1.8 matthew 656: $answer->{$partid}->{$respid} = &get_answer($prefix,$key,%Answer);
1.6 matthew 657: }
1.8 matthew 658: }
659: if (! defined($partid)) {
660: $returnvalue = $answer;
661: } elsif (! defined($respid)) {
662: $returnvalue = $answer->{$partid};
1.6 matthew 663: } else {
1.8 matthew 664: $returnvalue = $answer->{$partid}->{$respid};
1.6 matthew 665: }
666: return $returnvalue;
667: }
668:
669: sub get_answer {
670: my ($prefix,$key,%Answer) = @_;
671: my $returnvalue;
1.4 matthew 672: if (exists($Answer{$key})) {
673: my $student_answer = $Answer{$key}->[0];
674: if (! defined($student_answer)) {
675: $student_answer = $Answer{$key}->[1];
676: }
677: $returnvalue = $student_answer;
678: } else {
679: if (exists($Answer{$prefix.'.shown'})) {
680: # The response has foils
681: my %values;
682: while (my ($k,$v) = each(%Answer)) {
683: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
684: my $foilname = $2;
685: $values{$foilname}=$v;
686: }
687: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
688: if (ref($values{$foil}) eq 'ARRAY') {
1.10 albertel 689: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
690: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
1.4 matthew 691: } else {
1.10 albertel 692: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
693: &HTML::Entities::encode($values{$foil},'<>&"').'&';
1.4 matthew 694: }
695: }
696: $returnvalue =~ s/ /\%20/g;
697: chop ($returnvalue);
698: }
699: }
700: return $returnvalue;
701: }
1.8 matthew 702:
703: #####################################################
704: #####################################################
705:
706: =pod
707:
708: =item Caching routines
709:
710: =over 4
711:
1.29 ! matthew 712: =item &load_analysis_cache($symb)
1.8 matthew 713:
714: Loads the cache for the given symb into memory from disk.
715: Requires the cache filename be set.
716: Only should be called by &ensure_proper_cache.
717:
718: =cut
719:
720: #####################################################
721: #####################################################
722: {
723: my $cache_filename = undef;
724: my $current_symb = undef;
725: my %cache;
726:
1.29 ! matthew 727: sub load_analysis_cache {
1.8 matthew 728: my ($symb) = @_;
729: return if (! defined($cache_filename));
730: if (! defined($current_symb) || $current_symb ne $symb) {
731: undef(%cache);
732: my $storedstring;
733: my %cache_db;
734: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
735: $storedstring = $cache_db{&Apache::lonnet::escape($symb)};
736: untie(%cache_db);
737: }
738: if (defined($storedstring)) {
739: %cache = %{thaw($storedstring)};
740: }
741: }
742: return;
743: }
744:
745: #####################################################
746: #####################################################
747:
748: =pod
749:
1.29 ! matthew 750: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
1.8 matthew 751:
752: Returns the appropriate data from the cache, or undef if no data exists.
753:
754: =cut
755:
756: #####################################################
757: #####################################################
1.29 ! matthew 758: sub get_from_analysis_cache {
! 759: my ($sname,$sdom,$symb) = @_;
1.8 matthew 760: &ensure_proper_cache($symb);
761: my $returnvalue;
1.29 ! matthew 762: if (exists($cache{$sname.':'.$sdom})) {
! 763: $returnvalue = $cache{$sname.':'.$sdom};
1.8 matthew 764: } else {
765: $returnvalue = undef;
766: }
767: return $returnvalue;
768: }
769:
770: #####################################################
771: #####################################################
772:
773: =pod
774:
1.29 ! matthew 775: =item &write_analysis_cache($symb)
1.8 matthew 776:
777: Writes the in memory cache to disk so that it can be read in with
1.29 ! matthew 778: &load_analysis_cache($symb).
1.8 matthew 779:
780: =cut
781:
782: #####################################################
783: #####################################################
1.29 ! matthew 784: sub write_analysis_cache {
1.8 matthew 785: return if (! defined($current_symb) || ! defined($cache_filename));
786: my %cache_db;
787: my $key = &Apache::lonnet::escape($current_symb);
788: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
789: my $storestring = freeze(\%cache);
790: $cache_db{$key}=$storestring;
791: $cache_db{$key.'.time'}=time;
792: untie(%cache_db);
793: }
794: undef(%cache);
795: undef($current_symb);
796: undef($cache_filename);
797: return;
798: }
799:
800: #####################################################
801: #####################################################
802:
803: =pod
804:
805: =item &ensure_proper_cache($symb)
806:
807: Called to make sure we have the proper cache set up. This is called
1.29 ! matthew 808: prior to every analysis lookup.
1.8 matthew 809:
810: =cut
811:
812: #####################################################
813: #####################################################
814: sub ensure_proper_cache {
815: my ($symb) = @_;
816: my $cid = $ENV{'request.course.id'};
817: my $new_filename = '/home/httpd/perl/tmp/'.
1.29 ! matthew 818: 'problemanalysis_'.$cid.'_analysis_cache.db';
1.8 matthew 819: if (! defined($cache_filename) ||
820: $cache_filename ne $new_filename ||
821: ! defined($current_symb) ||
822: $current_symb ne $symb) {
823: $cache_filename = $new_filename;
824: # Notice: $current_symb is not set to $symb until after the cache is
1.29 ! matthew 825: # loaded. This is what tells &load_analysis_cache to load in a new
1.8 matthew 826: # symb cache.
1.29 ! matthew 827: &load_analysis_cache($symb);
1.8 matthew 828: $current_symb = $symb;
829: }
830: }
831:
832: #####################################################
833: #####################################################
834:
835: =pod
836:
1.29 ! matthew 837: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1.8 matthew 838:
1.29 ! matthew 839: Stores the analysis data in the in memory cache.
1.8 matthew 840:
841: =cut
842:
843: #####################################################
844: #####################################################
1.29 ! matthew 845: sub store_analysis {
! 846: my ($sname,$sdom,$symb,$dataset) = @_;
1.8 matthew 847: return if ($symb ne $current_symb);
1.29 ! matthew 848: $cache{$sname.':'.$sdom}=$dataset;
1.8 matthew 849: return;
850: }
851:
852: }
853: #####################################################
854: #####################################################
855:
856: =pod
857:
858: =back
859:
860: =cut
861:
862: #####################################################
863: #####################################################
1.4 matthew 864:
865: ##
866: ## The following is copied from datecalc1.pl, part of the
867: ## Spreadsheet::WriteExcel CPAN module.
868: ##
869: ##
870: ######################################################################
871: #
872: # Demonstration of writing date/time cells to Excel spreadsheets,
873: # using UNIX/Perl time as source of date/time.
874: #
875: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
876: #
877: ######################################################################
878: #
879: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
880: # measured in seconds.
881: #
882: # An Excel file can use exactly one of two different date/time systems.
883: # In these systems, a floating point number represents the number of days
884: # (and fractional parts of the day) since a start point. The floating point
885: # number is referred to as a 'serial'.
886: # The two systems ('1900' and '1904') use different starting points:
887: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
888: # a leap year - see:
889: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
890: # for the excuse^H^H^H^H^H^Hreason.
891: # '1904'; '1.00' is 2 Jan 1904.
892: #
893: # The '1904' system is the default for Apple Macs. Windows versions of
894: # Excel have the option to use the '1904' system.
895: #
896: # Note that Visual Basic's "DateSerial" function does NOT erroneously
897: # regard 1900 as a leap year, and thus its serials do not agree with
898: # the 1900 serials of Excel for dates before 1 Mar 1900.
899: #
900: # Note that StarOffice (at least at version 5.2) does NOT erroneously
901: # regard 1900 as a leap year, and thus its serials do not agree with
902: # the 1900 serials of Excel for dates before 1 Mar 1900.
903: #
904: ######################################################################
905: #
906: # Calculation description
907: # =======================
908: #
909: # 1900 system
910: # -----------
911: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
912: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
913: # were leap years with an extra day.
914: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
915: # 1 Jan 1970.
916: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
917: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
918: #
919: # 1904 system
920: # -----------
921: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
922: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
923: # were leap years with an extra day.
924: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
925: # 1 Jan 1970.
926: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
927: #
928: ######################################################################
929: #
930: # Copyright (c) 2000, Andrew Benham.
931: # This program is free software. It may be used, redistributed and/or
932: # modified under the same terms as Perl itself.
933: #
934: # Andrew Benham, adsb@bigfoot.com
935: # London, United Kingdom
936: # 11 Nov 2000
937: #
938: ######################################################################
939: #-----------------------------------------------------------
940: # calc_serial()
941: #
942: # Called with (up to) 2 parameters.
943: # 1. Unix timestamp. If omitted, uses current time.
944: # 2. GMT flag. Set to '1' to return serial in GMT.
945: # If omitted, returns serial in appropriate timezone.
946: #
947: # Returns date/time serial according to $DATE_SYSTEM selected
948: #-----------------------------------------------------------
949: sub calc_serial {
950: # Use 1900 date system on all platforms other than Apple Mac (for which
951: # use 1904 date system).
952: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
953: my $time = (defined $_[0]) ? $_[0] : time();
954: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
955: #
956: # Divide timestamp by number of seconds in a day.
957: # This gives a date serial with '0' on 1 Jan 1970.
958: my $serial = $time / 86400;
959: #
960: # Adjust the date serial by the offset appropriate to the
961: # currently selected system (1900/1904).
962: if ($DATE_SYSTEM == 0) { # use 1900 system
963: $serial += 25569;
964: } else { # use 1904 system
965: $serial += 24107;
966: }
967: #
968: unless ($gmtflag) {
969: # Now have a 'raw' serial with the right offset. But this
970: # gives a serial in GMT, which is false unless the timezone
971: # is GMT. We need to adjust the serial by the appropriate
972: # timezone offset.
973: # Calculate the appropriate timezone offset by seeing what
974: # the differences between localtime and gmtime for the given
975: # time are.
976: #
977: my @gmtime = gmtime($time);
978: my @ltime = localtime($time);
979: #
980: # For the first 7 elements of the two arrays, adjust the
981: # date serial where the elements differ.
982: for (0 .. 6) {
983: my $diff = $ltime[$_] - $gmtime[$_];
984: if ($diff) {
985: $serial += _adjustment($diff,$_);
986: }
987: }
988: }
989: #
990: # Perpetuate the error that 1900 was a leap year by decrementing
991: # the serial if we're using the 1900 system and the date is prior to
992: # 1 Mar 1900. This has the effect of making serial value '60'
993: # 29 Feb 1900.
994: #
995: # This fix only has any effect if UNIX/Perl time on the platform
996: # can represent 1900. Many can't.
997: #
998: unless ($DATE_SYSTEM) {
999: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1000: }
1001: return $serial;
1002: }
1003:
1004: sub _adjustment {
1005: # Based on the difference in the localtime/gmtime array elements
1006: # number, return the adjustment required to the serial.
1007: #
1008: # We only look at some elements of the localtime/gmtime arrays:
1009: # seconds unlikely to be different as all known timezones
1010: # have an offset of integral multiples of 15 minutes,
1011: # but it's easy to do.
1012: # minutes will be different for timezone offsets which are
1013: # not an exact number of hours.
1014: # hours very likely to be different.
1015: # weekday will differ when localtime/gmtime difference
1016: # straddles midnight.
1017: #
1018: # Assume that difference between localtime and gmtime is less than
1019: # 5 days, then don't have to do maths for day of month, month number,
1020: # year number, etc...
1021: #
1022: my ($delta,$element) = @_;
1023: my $adjust = 0;
1024: #
1025: if ($element == 0) { # Seconds
1026: $adjust = $delta/86400; # 60 * 60 * 24
1027: } elsif ($element == 1) { # Minutes
1028: $adjust = $delta/1440; # 60 * 24
1029: } elsif ($element == 2) { # Hours
1030: $adjust = $delta/24; # 24
1031: } elsif ($element == 6) { # Day of week number
1032: # Catch difference straddling Sat/Sun in either direction
1033: $delta += 7 if ($delta < -4);
1034: $delta -= 7 if ($delta > 4);
1035: #
1036: $adjust = $delta;
1037: }
1038: return $adjust;
1039: }
1040:
1041: ###########################################################
1042: ###########################################################
1043:
1044: =pod
1045:
1046: =item get_problem_data
1047:
1048: Returns a data structure describing the problem.
1049:
1050: Inputs: $url
1051:
1052: Returns: %Partdata
1053:
1054: =cut
1055:
1056: ## note: we must force each foil and option to not begin or end with
1057: ## spaces as they are stored without such data.
1058: ##
1059: ###########################################################
1060: ###########################################################
1061: sub get_problem_data {
1062: my ($url) = @_;
1063: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1064: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1065: my %Answer;
1066: %Answer=&Apache::lonnet::str2hash($Answ);
1067: my %Partdata;
1068: foreach my $part (@{$Answer{'parts'}}) {
1069: while (my($key,$value) = each(%Answer)) {
1070: #
1071: # Logging code:
1.7 matthew 1072: if (0) {
1.4 matthew 1073: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1074: if (ref($value) eq 'ARRAY') {
1075: &Apache::lonnet::logthis(' @'.join(',',@$value));
1076: } else {
1077: &Apache::lonnet::logthis(' '.$value);
1078: }
1079: }
1080: # End of logging code
1081: next if ($key !~ /^$part/);
1082: $key =~ s/^$part\.//;
1083: if (ref($value) eq 'ARRAY') {
1084: if ($key eq 'options') {
1085: $Partdata{$part}->{'_Options'}=$value;
1086: } elsif ($key eq 'concepts') {
1087: $Partdata{$part}->{'_Concepts'}=$value;
1.28 matthew 1088: } elsif ($key eq 'items') {
1089: $Partdata{$part}->{'_Items'}=$value;
1.4 matthew 1090: } elsif ($key =~ /^concept\.(.*)$/) {
1091: my $concept = $1;
1092: foreach my $foil (@$value) {
1093: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1094: $concept;
1095: }
1.28 matthew 1096: } elsif ($key =~ /^(incorrect|answer|ans_low|ans_high|str_type)$/) {
1.4 matthew 1097: $Partdata{$part}->{$key}=$value;
1098: }
1099: } else {
1100: if ($key=~ /^foil\.text\.(.*)$/) {
1101: my $foil = $1;
1102: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1103: $value =~ s/(\s*$|^\s*)//g;
1104: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1105: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1106: my $foil = $1;
1107: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1.28 matthew 1108: } elsif ($key eq 'answercomputed') {
1109: $Partdata{$part}->{'answercomputed'} = $value;
1.4 matthew 1110: }
1111: }
1112: }
1113: }
1.28 matthew 1114: # Further debugging code
1115: if (0) {
1116: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1117: &log_hash_ref(\%Partdata);
1118: }
1.4 matthew 1119: return %Partdata;
1.5 matthew 1120: }
1121:
1.28 matthew 1122: sub log_array_ref {
1123: my ($arrayref,$prefix) = @_;
1124: return if (ref($arrayref) ne 'ARRAY');
1125: if (! defined($prefix)) { $prefix = ''; };
1126: foreach my $v (@$arrayref) {
1127: if (ref($v) eq 'ARRAY') {
1128: &log_array_ref($v,$prefix.' ');
1129: } elsif (ref($v) eq 'HASH') {
1130: &log_hash_ref($v,$prefix.' ');
1131: } else {
1132: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1133: }
1134: }
1135: }
1136:
1137: sub log_hash_ref {
1138: my ($hashref,$prefix) = @_;
1139: return if (ref($hashref) ne 'HASH');
1140: if (! defined($prefix)) { $prefix = ''; };
1141: while (my ($k,$v) = each(%$hashref)) {
1142: if (ref($v) eq 'ARRAY') {
1143: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1144: &log_array_ref($v,$prefix.' ');
1145: } elsif (ref($v) eq 'HASH') {
1146: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1147: &log_hash_ref($v,$prefix.' ');
1148: } else {
1149: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1150: }
1151: }
1152: }
1.5 matthew 1153: ####################################################
1154: ####################################################
1155:
1156: =pod
1157:
1158: =item &limit_by_time()
1159:
1160: =cut
1161:
1162: ####################################################
1163: ####################################################
1164: sub limit_by_time_form {
1165: my $Starttime_form = '';
1166: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1167: ('limitby_startdate');
1168: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1169: ('limitby_enddate');
1170: if (! defined($endtime)) {
1171: $endtime = time;
1172: }
1173: if (! defined($starttime)) {
1174: $starttime = $endtime - 60*60*24*7;
1175: }
1176: my $state;
1177: if (&limit_by_time()) {
1178: $state = '';
1179: } else {
1180: $state = 'disabled';
1181: }
1182: my $startdateform = &Apache::lonhtmlcommon::date_setter
1183: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1184: my $enddateform = &Apache::lonhtmlcommon::date_setter
1185: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1186: my $Str;
1187: $Str .= '<script language="Javascript" >';
1188: $Str .= 'function toggle_limitby_activity(state) {';
1189: $Str .= ' if (state) {';
1190: $Str .= ' limitby_startdate_enable();';
1191: $Str .= ' limitby_enddate_enable();';
1192: $Str .= ' } else {';
1193: $Str .= ' limitby_startdate_disable();';
1194: $Str .= ' limitby_enddate_disable();';
1195: $Str .= ' }';
1196: $Str .= '}';
1197: $Str .= '</script>';
1198: $Str .= '<fieldset>';
1199: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1200: if (&limit_by_time()) {
1201: $timecheckbox .= ' checked ';
1202: }
1203: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1204: $timecheckbox .= ' />';
1205: $Str .= '<legend>'.&mt('[_1] Limit by time',$timecheckbox).'</legend>';
1206: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1207: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1208: $Str .= '</fieldset>';
1209: return $Str;
1210: }
1211:
1212: sub limit_by_time {
1213: if (exists($ENV{'form.limit_by_time'}) &&
1214: $ENV{'form.limit_by_time'} ne '' ) {
1215: return 1;
1216: } else {
1217: return 0;
1218: }
1219: }
1220:
1221: sub get_time_limits {
1222: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1223: ('limitby_startdate');
1224: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1225: ('limitby_enddate');
1226: return ($starttime,$endtime);
1.11 matthew 1227: }
1228:
1229:
1230:
1231: ####################################################
1232: ####################################################
1233:
1234: =pod
1235:
1236: =item sections_description
1237:
1238: Inputs: @Sections, an array of sections
1239:
1240: Returns: A text description of the sections selected.
1241:
1242: =cut
1243:
1244: ####################################################
1245: ####################################################
1246: sub sections_description {
1247: my @Sections = @_;
1248: my $sectionstring = '';
1249: if (scalar(@Sections) > 1) {
1250: if (scalar(@Sections) > 2) {
1251: my $last = pop(@Sections);
1252: $sectionstring = "Sections ".join(', ',@Sections).', and '.$last;
1253: } else {
1254: $sectionstring = "Sections ".join(' and ',@Sections);
1255: }
1256: } else {
1257: if ($Sections[0] eq 'all') {
1258: $sectionstring = "All sections";
1259: } else {
1260: $sectionstring = "Section ".$Sections[0];
1261: }
1262: }
1263: return $sectionstring;
1.2 matthew 1264: }
1265:
1266: ####################################################
1267: ####################################################
1268:
1269: =pod
1270:
1.12 matthew 1271: =item &manage_caches
1272:
1273: Inputs: $r, apache request object
1274:
1275: Returns: An array of scalars containing html for buttons.
1276:
1277: =cut
1278:
1279: ####################################################
1280: ####################################################
1281: sub manage_caches {
1.23 matthew 1282: my ($r,$formname,$inputname,$update_message) = @_;
1.12 matthew 1283: &Apache::loncoursedata::clear_internal_caches();
1.16 matthew 1284: my $sectionkey =
1285: join(',',
1286: map {
1287: &Apache::lonnet::escape($_);
1288: } sort(@Apache::lonstatistics::SelectedSections)
1289: );
1290: my $statuskey = $Apache::lonstatistics::enrollment_status;
1.12 matthew 1291: if (exists($ENV{'form.ClearCache'}) ||
1.16 matthew 1292: exists($ENV{'form.updatecaches'}) ||
1293: (exists($ENV{'form.firstrun'}) && $ENV{'form.firstrun'} ne 'no') ||
1294: (exists($ENV{'form.prevsection'}) &&
1295: $ENV{'form.prevsection'} ne $sectionkey) ||
1296: (exists($ENV{'form.prevenrollstatus'}) &&
1297: $ENV{'form.prevenrollstatus'} ne $statuskey)
1298: ) {
1.23 matthew 1299: if (defined($update_message)) {
1300: $r->print($update_message);
1301: }
1.12 matthew 1302: &Apache::lonstatistics::Gather_Full_Student_Data($r,$formname,
1303: $inputname);
1.23 matthew 1304:
1.12 matthew 1305: }
1306: #
1.16 matthew 1307: my @Buttons =
1308: ('<input type="submit" name="ClearCache" '.
1309: 'value="'.&mt('Clear Caches').'" />',
1310: '<input type="submit" name="updatecaches" '.
1.17 matthew 1311: 'value="'.&mt('Update Caches').'" />'.
1312: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1.16 matthew 1313: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1314: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1315: );
1316: #
1.12 matthew 1317: if (! exists($ENV{'form.firstrun'})) {
1318: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1319: } else {
1320: $r->print('<input type="hidden" name="firstrun" value="no" />');
1321: }
1322: #
1323: return @Buttons;
1324: }
1325:
1326:
1327:
1328:
1329: ####################################################
1330: ####################################################
1331:
1332: =pod
1333:
1.2 matthew 1334: =back
1335:
1336: =cut
1337:
1338: ####################################################
1339: ####################################################
1.1 matthew 1340:
1341: 1;
1342:
1343: __END__
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