Annotation of loncom/interface/statistics/lonstathelpers.pm, revision 1.41
1.1 matthew 1: # The LearningOnline Network with CAPA
2: #
1.41 ! matthew 3: # $Id: lonstathelpers.pm,v 1.40 2005/02/28 20:16:03 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'}.$base;
1.40 matthew 88: my ($src,$symb)=($resource->src,&Apache::lonnet::escape($resource->symb));
89: my $rendered_problem = &Apache::lonnet::ssi_body($src.'?symb='.$symb);
1.1 matthew 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: $rendered_problem.
95: '</td></tr></table>';
96: }
1.2 matthew 97:
98: ####################################################
99: ####################################################
100:
101: =pod
102:
1.40 matthew 103: =item &get_resources
104:
105: =cut
106:
107: ####################################################
108: ####################################################
109: sub get_resources {
110: my ($navmap,$sequence) = @_;
111: my @resources = $navmap->retrieveResources($sequence,
112: sub { shift->is_problem(); },
113: 0,0,0);
114: return @resources;
115: }
116:
117: ####################################################
118: ####################################################
119:
120: =pod
121:
122: =item &problem_selector($AcceptedResponseTypes)
1.2 matthew 123:
124: Input: scalar containing regular expression which matches response
125: types to show. '.' will yield all, '(option|radiobutton)' will match
126: all option response and radiobutton problems.
127:
128: Returns: A string containing html for a table which lists the sequences
129: and their contents. A radiobutton is provided for each problem.
1.14 matthew 130: Skips 'survey' problems.
1.2 matthew 131:
132: =cut
133:
134: ####################################################
135: ####################################################
1.40 matthew 136: sub problem_selector {
1.2 matthew 137: my ($AcceptedResponseTypes) = @_;
138: my $Str;
139: $Str = "\n<table>\n";
1.27 matthew 140: my $rb_count =0;
1.40 matthew 141: my ($navmap,@sequences) =
142: &Apache::lonstatistics::selected_sequences_with_assessments('all');
143: return $navmap if (! ref($navmap)); # error
144: foreach my $seq (@sequences) {
1.2 matthew 145: my $seq_str = '';
1.40 matthew 146: foreach my $res (&get_resources($navmap,$seq)) {
147: foreach my $part (@{$res->parts}) {
148: my @response_ids = $res->responseIds($part);
149: my @response_types = $res->responseType($part);
150: for (my $i=0;$i<scalar(@response_types);$i++){
151: my $respid = $response_ids[$i];
152: my $resptype = $response_types[$i];
1.2 matthew 153: if ($resptype =~ m/$AcceptedResponseTypes/) {
1.40 matthew 154: my $value = &make_target_id({symb=>$res->symb,
1.2 matthew 155: part=>$part,
156: respid=>$respid,
157: resptype=>$resptype});
158: my $checked = '';
159: if ($ENV{'form.problemchoice'} eq $value) {
160: $checked = 'checked ';
161: }
1.40 matthew 162: my $title = $res->compTitle;
1.2 matthew 163: if (! defined($title) || $title eq '') {
1.40 matthew 164: ($title) = ($res->src =~ m:/([^/]*)$:);
1.2 matthew 165: }
1.27 matthew 166: $seq_str .= '<tr>'.
167: qq{<td><input type="radio" id="$rb_count" name="problemchoice" value="$value" $checked /></td>}.
168: '<td><label for="'.$rb_count.'">'.$resptype.'</label></td>'.
169: '<td><label for="'.$rb_count.'">'.$title.'</label>';
1.40 matthew 170: if (scalar(@response_ids) > 1) {
1.2 matthew 171: $seq_str .= &mt('response').' '.$respid;
172: }
1.41 ! matthew 173: my $link = $res->src.'?symb='.
1.40 matthew 174: &Apache::lonnet::escape($res->symb);
1.27 matthew 175: $seq_str .= (' 'x2).
1.34 matthew 176: qq{<a target="preview" href="$link">view</a>};
1.2 matthew 177: $seq_str .= "</td></tr>\n";
1.27 matthew 178: $rb_count++;
1.2 matthew 179: }
180: }
181: }
182: }
183: if ($seq_str ne '') {
1.40 matthew 184: $Str .= '<tr><td> </td><td colspan="2"><b>'.$seq->compTitle.'</b></td>'.
1.2 matthew 185: "</tr>\n".$seq_str;
186: }
187: }
188: $Str .= "</table>\n";
189: return $Str;
190: }
191:
192: ####################################################
193: ####################################################
194:
195: =pod
196:
1.24 matthew 197: =item &MultipleProblemSelector($navmap,$selected,$inputname)
1.21 matthew 198:
199: Generate HTML with checkboxes for problem selection.
200:
201: Input:
202:
203: $navmap: a navmap object. If undef, navmaps will be called to create a
204: new object.
205:
206: $selected: Scalar, Array, or hash reference of currently selected items.
207:
208: $inputname: The name of the form elements to use for the checkboxs.
209:
210: Returns: A string containing html for a table which lists the sequences
211: and their contents. A checkbox is provided for each problem.
212:
213: =cut
214:
215: ####################################################
216: ####################################################
217: sub MultipleProblemSelector {
1.23 matthew 218: my ($navmap,$inputname,$formname)=@_;
1.21 matthew 219: my $cid = $ENV{'request.course.id'};
220: my $Str;
221: # Massage the input as needed.
222: if (! defined($navmap)) {
223: $navmap = Apache::lonnavmaps::navmap->new();
224: if (! defined($navmap)) {
225: $Str .=
226: '<h1>'.&mt('Error: cannot process course structure').'</h1>';
227: return $Str;
228: }
229: }
230: my $selected = {map { ($_,1) } (&get_selected_symbs($inputname))};
231: # Header
232: $Str .= <<"END";
1.25 matthew 233: <script language="JavaScript" type="text/javascript">
234: function checkall(value,seqid) {
1.21 matthew 235: for (i=0; i<document.forms.$formname.elements.length; i++) {
236: ele = document.forms.$formname.elements[i];
237: if (ele.name == '$inputname') {
1.25 matthew 238: if (seqid != null) {
239: itemid = document.forms.$formname.elements[i].id;
240: thing = itemid.split(':');
241: if (thing[0] == seqid) {
242: document.forms.$formname.elements[i].checked=value;
243: }
244: } else {
245: document.forms.$formname.elements[i].checked=value;
246: }
1.21 matthew 247: }
248: }
249: }
250: </script>
251: END
252: $Str .=
253: '<a href="javascript:checkall(true)">'.&mt('Select All').'</a>'.
254: (' 'x4).
255: '<a href="javascript:checkall(false)">'.&mt('Unselect All').'</a>';
256: $Str .= $/.'<table>'.$/;
257: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
258: my $sequence_string;
1.25 matthew 259: my $seq_id = 0;
1.21 matthew 260: my @Accumulator = (&new_accumulator($ENV{'course.'.$cid.'.description'},
261: '',
262: '',
1.25 matthew 263: $seq_id++,
1.21 matthew 264: $inputname));
265: my @Sequence_Data;
266: while (my $curRes = $iterator->next()) {
267: if ($curRes == $iterator->END_MAP) {
268: if (ref($Accumulator[-1]) eq 'CODE') {
1.24 matthew 269: my $old_accumulator = pop(@Accumulator);
270: push(@Sequence_Data,&{$old_accumulator}());
1.21 matthew 271: }
272: } elsif ($curRes == $iterator->BEGIN_MAP) {
273: # Not much to do here.
274: }
275: next if (! ref($curRes));
276: if ($curRes->is_map) {
1.24 matthew 277: push(@Accumulator,&new_accumulator($curRes->compTitle,
1.21 matthew 278: $curRes->src,
279: $curRes->symb,
1.25 matthew 280: $seq_id++,
1.21 matthew 281: $inputname));
282: } elsif ($curRes->is_problem) {
283: if (@Accumulator && $Accumulator[-1] ne '') {
284: &{$Accumulator[-1]}($curRes,
285: exists($selected->{$curRes->symb}));
286: }
287: }
288: }
289: my $course_seq = pop(@Sequence_Data);
290: foreach my $seq ($course_seq,@Sequence_Data) {
291: #my $seq = pop(@Sequence_Data);
292: next if (! defined($seq) || ref($seq) ne 'HASH');
293: $Str.= '<tr><td colspan="2">'.
1.25 matthew 294: '<b>'.$seq->{'title'}.'</b>'.(' 'x2).
295: '<a href="javascript:checkall(true,'.$seq->{'id'}.')">'.
296: &mt('Select').'</a>'.(' 'x2).
297: '<a href="javascript:checkall(false,'.$seq->{'id'}.')">'.
298: &mt('Unselect').'</a>'.(' 'x2).
1.21 matthew 299: '</td></tr>'.$/;
300: $Str.= $seq->{'html'};
301: }
302: $Str .= '</table>'.$/;
303: return $Str;
304: }
305:
306: sub new_accumulator {
1.25 matthew 307: my ($title,$src,$symb,$seq_id,$inputname) = @_;
1.21 matthew 308: my $target;
1.25 matthew 309: my $item_id=0;
1.21 matthew 310: return
311: sub {
312: if (@_) {
313: my ($res,$checked) = @_;
1.23 matthew 314: $target.='<tr><td><label>'.
1.21 matthew 315: '<input type="checkbox" name="'.$inputname.'" ';
316: if ($checked) {
317: $target .= 'checked ';
318: }
1.25 matthew 319: $target .= 'id="'.$seq_id.':'.$item_id++.'" ';
1.21 matthew 320: $target.=
321: 'value="'.&Apache::lonnet::escape($res->symb).'" />'.
1.26 matthew 322: ' '.$res->compTitle.'</label>'.
323: (' 'x2).'<a target="preview" '.
1.34 matthew 324: 'href="'.$res->src.'?symb='.
1.39 matthew 325: &Apache::lonnet::escape($res->symb).'">view</a>'.
1.26 matthew 326: '</td></tr>'.$/;
1.21 matthew 327: } else {
328: if (defined($target)) {
329: return { title => $title,
330: symb => $symb,
331: src => $src,
1.25 matthew 332: id => $seq_id,
1.21 matthew 333: html => $target, };
334: }
335: return undef;
336: }
337: };
338: }
339:
340: sub get_selected_symbs {
341: my ($inputfield) = @_;
342: my $field = 'form.'.$inputfield;
343: my @Symbs;
344: if (exists($ENV{$field})) {
345: if (! ref($ENV{$field})) {
346: @Symbs = (&Apache::lonnet::unescape($ENV{$field}));
347: } else {
348: @Symbs = (map {&Apache::lonnet::unescape($_);} @{$ENV{$field}});
349: }
350: }
351: return @Symbs;
352: }
353:
354: ####################################################
355: ####################################################
356:
357: =pod
358:
1.2 matthew 359: =item &make_target_id($target)
360:
361: Inputs: Hash ref with the following entries:
362: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
363: $target->{'resptype'}.
364:
365: Returns: A string, suitable for a form parameter, which uniquely identifies
366: the problem, part, and response to do statistical analysis on.
367:
368: Used by Apache::lonstathelpers::ProblemSelector().
369:
370: =cut
371:
372: ####################################################
373: ####################################################
374: sub make_target_id {
375: my ($target) = @_;
376: my $id = &Apache::lonnet::escape($target->{'symb'}).':'.
377: &Apache::lonnet::escape($target->{'part'}).':'.
378: &Apache::lonnet::escape($target->{'respid'}).':'.
379: &Apache::lonnet::escape($target->{'resptype'});
380: return $id;
381: }
382:
383: ####################################################
384: ####################################################
385:
386: =pod
387:
388: =item &get_target_from_id($id)
389:
390: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
391:
392: Returns: A hash reference, $target, containing the following keys:
393: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
394: $target->{'resptype'}.
395:
396: =cut
397:
398: ####################################################
399: ####################################################
400: sub get_target_from_id {
401: my ($id) = @_;
1.21 matthew 402: if (! ref($id)) {
403: my ($symb,$part,$respid,$resptype) = split(':',$id);
404: return ({ symb => &Apache::lonnet::unescape($symb),
405: part => &Apache::lonnet::unescape($part),
406: respid => &Apache::lonnet::unescape($respid),
407: resptype => &Apache::lonnet::unescape($resptype)});
408: } elsif (ref($id) eq 'ARRAY') {
409: my @Return;
410: foreach my $selected (@$id) {
411: my ($symb,$part,$respid,$resptype) = split(':',$selected);
412: push(@Return,{ symb => &Apache::lonnet::unescape($symb),
413: part => &Apache::lonnet::unescape($part),
414: respid => &Apache::lonnet::unescape($respid),
415: resptype => &Apache::lonnet::unescape($resptype)});
416: }
417: return \@Return;
418: }
1.2 matthew 419: }
420:
421: ####################################################
422: ####################################################
423:
424: =pod
425:
1.13 matthew 426: =item &get_prev_curr_next($target,$AcceptableResponseTypes,$granularity)
1.2 matthew 427:
428: Determine the problem parts or responses preceeding and following the
429: current resource.
430:
431: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
432: $AcceptableResponseTypes, regular expression matching acceptable
433: response types,
1.13 matthew 434: $granularity, either 'part', 'response', or 'part_survey'
1.2 matthew 435:
436: Returns: three hash references, $prev, $curr, $next, which refer to the
437: preceeding, current, or following problem parts or responses, depending
438: on the value of $granularity. Values of undef indicate there is no
439: previous or next part/response. A value of undef for all three indicates
440: there was no match found to the current part/resource.
441:
442: The hash references contain the following keys:
443: symb, part, resource
444:
445: If $granularity eq 'response', the following ADDITIONAL keys will be present:
446: respid, resptype
447:
448: =cut
449:
450: ####################################################
451: ####################################################
452: sub get_prev_curr_next {
453: my ($target,$AcceptableResponseTypes,$granularity) = @_;
454: #
455: # Build an array with the data we need to search through
456: my @Resource;
1.40 matthew 457: my ($navmap,@sequences) =
458: &Apache::lonstatistics::selected_sequences_with_assessments('all');
459: return $navmap if (! ref($navmap));
460: foreach my $seq (@sequences) {
461: my @resources = &get_resources($navmap,$seq);
462: foreach my $res (@resources) {
463: foreach my $part (@{$res->parts}) {
464: if ($res->is_survey($part) && ($granularity eq 'part_survey')){
1.20 matthew 465: push (@Resource,
1.40 matthew 466: { symb => $res->symb,
1.20 matthew 467: part => $part,
468: resource => $res,
469: } );
1.13 matthew 470: } elsif ($granularity eq 'part') {
1.2 matthew 471: push (@Resource,
1.40 matthew 472: { symb => $res->symb,
1.2 matthew 473: part => $part,
474: resource => $res,
475: } );
476: } elsif ($granularity eq 'response') {
1.40 matthew 477: my @response_ids = $res->responseIds($part);
478: my @response_types = $res->responseType($part);
1.2 matthew 479: for (my $i=0;
1.40 matthew 480: $i<scalar(@response_ids);
1.2 matthew 481: $i++){
1.40 matthew 482: my $respid = $response_ids[$i];
483: my $resptype = $response_types[$i];
1.2 matthew 484: next if ($resptype !~ m/$AcceptableResponseTypes/);
485: push (@Resource,
1.40 matthew 486: { symb => $res->symb,
1.2 matthew 487: part => $part,
1.40 matthew 488: respid => $respid,
489: resptype => $resptype,
1.2 matthew 490: resource => $res,
491: } );
492: }
493: }
494: }
495: }
496: }
497: #
498: # Get the index of the current situation
499: my $curr_idx;
500: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
501: my $curr_item = $Resource[$curr_idx];
1.13 matthew 502: if ($granularity eq 'part' || $granularity eq 'part_survey') {
1.2 matthew 503: if ($curr_item->{'symb'} eq $target->{'symb'} &&
504: $curr_item->{'part'} eq $target->{'part'}) {
505: last;
506: }
507: } elsif ($granularity eq 'response') {
508: if ($curr_item->{'symb'} eq $target->{'symb'} &&
509: $curr_item->{'part'} eq $target->{'part'} &&
510: $curr_item->{'respid'} eq $target->{'respid'} &&
511: $curr_item->{'resptype'} eq $target->{'resptype'}) {
512: last;
513: }
514: }
515: }
516: my $curr_item = $Resource[$curr_idx];
1.13 matthew 517: if ($granularity eq 'part' || $granularity eq 'part_survey') {
1.2 matthew 518: if ($curr_item->{'symb'} ne $target->{'symb'} ||
519: $curr_item->{'part'} ne $target->{'part'}) {
520: # bogus symb - return nothing
521: return (undef,undef,undef);
522: }
523: } elsif ($granularity eq 'response') {
524: if ($curr_item->{'symb'} ne $target->{'symb'} ||
525: $curr_item->{'part'} ne $target->{'part'} ||
526: $curr_item->{'respid'} ne $target->{'respid'} ||
527: $curr_item->{'resptype'} ne $target->{'resptype'}){
528: # bogus symb - return nothing
529: return (undef,undef,undef);
530: }
531: }
532: #
533: # Now just pick up the data we need
534: my ($prev,$curr,$next);
535: if ($curr_idx == 0) {
536: $prev = undef;
537: $curr = $Resource[$curr_idx ];
538: $next = $Resource[$curr_idx+1];
539: } elsif ($curr_idx == $#Resource) {
540: $prev = $Resource[$curr_idx-1];
541: $curr = $Resource[$curr_idx ];
542: $next = undef;
543: } else {
544: $prev = $Resource[$curr_idx-1];
545: $curr = $Resource[$curr_idx ];
546: $next = $Resource[$curr_idx+1];
547: }
1.40 matthew 548: return ($navmap,$prev,$curr,$next);
1.4 matthew 549: }
550:
1.9 matthew 551:
552: #####################################################
553: #####################################################
554:
555: =pod
556:
557: =item GetStudentAnswers($r,$problem,$Students)
558:
559: Determines the correct answer for a set of students on a given problem.
560: The students answers are stored in the student hashes pointed to by the
561: array @$Students under the key 'answer'.
562:
563: Inputs: $r
564: $problem: hash reference containing the keys 'resource', 'part', and 'respid'.
565: $Students: reference to array containing student hashes (need 'username',
566: 'domain').
567:
568: Returns: nothing
569:
570: =cut
571:
572: #####################################################
573: #####################################################
574: sub GetStudentAnswers {
1.12 matthew 575: my ($r,$problem,$Students,$formname,$inputname) = @_;
1.31 matthew 576: my %answers;
1.12 matthew 577: my $status_type;
578: if (defined($formname)) {
579: $status_type = 'inline';
580: } else {
581: $status_type = 'popup';
582: }
1.9 matthew 583: my $c = $r->connection();
584: my %Answers;
585: my ($resource,$partid,$respid) = ($problem->{'resource'},
586: $problem->{'part'},
587: $problem->{'respid'});
588: # Read in the cache (if it exists) before we start timing things.
589: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
590: # Open progress window
591: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
592: ($r,'Student Answer Compilation Status',
1.12 matthew 593: 'Student Answer Compilation Progress', scalar(@$Students),
594: $status_type,undef,$formname,$inputname);
1.9 matthew 595: $r->rflush();
596: foreach my $student (@$Students) {
597: last if ($c->aborted());
598: my $sname = $student->{'username'};
599: my $sdom = $student->{'domain'};
1.30 matthew 600: my $answer = &Apache::lonstathelpers::get_student_answer
1.9 matthew 601: ($resource,$sname,$sdom,$partid,$respid);
602: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
603: &mt('last student'));
1.31 matthew 604: $answers{$answer}++;
1.9 matthew 605: $student->{'answer'} = $answer;
606: }
1.29 matthew 607: &Apache::lonstathelpers::write_analysis_cache();
1.9 matthew 608: return if ($c->aborted());
609: $r->rflush();
610: # close progress window
611: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1.31 matthew 612: return \%answers;
1.9 matthew 613: }
1.4 matthew 614:
615: #####################################################
616: #####################################################
617:
618: =pod
619:
620: =item analyze_problem_as_student
621:
1.30 matthew 622: Analyzes a homework problem for a student
1.4 matthew 623:
624: Inputs: $resource: a resource object
625: $sname, $sdom, $partid, $respid
626:
1.30 matthew 627: Returns: the problem analysis hash
1.6 matthew 628:
1.4 matthew 629: =cut
630:
631: #####################################################
632: #####################################################
633: sub analyze_problem_as_student {
1.30 matthew 634: my ($resource,$sname,$sdom) = @_;
1.22 matthew 635: if (ref($resource) ne 'HASH') {
636: my $res = $resource;
637: $resource = { 'src' => $res->src,
638: 'symb' => $res->symb,
639: 'parts' => $res->parts };
640: foreach my $part (@{$resource->{'parts'}}) {
641: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
642: [$res->responseIds($part)];
643: }
644: }
1.4 matthew 645: my $url = $resource->{'src'};
646: my $symb = $resource->{'symb'};
1.29 matthew 647: my $analysis = &get_from_analysis_cache($sname,$sdom,$symb);
648: if (! defined($analysis)) {
649: my $courseid = $ENV{'request.course.id'};
650: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
651: 'grade_domain' => $sdom,
652: 'grade_username' => $sname,
653: 'grade_symb' => $symb,
654: 'grade_courseid' => $courseid));
655: (my $garbage,$analysis)=split(/_HASH_REF__/,$Answ,2);
656: &store_analysis($sname,$sdom,$symb,$analysis);
657: }
658: my %Answer=&Apache::lonnet::str2hash($analysis);
1.6 matthew 659: #
1.30 matthew 660: return \%Answer;
661: }
662:
663: #####################################################
664: #####################################################
665:
666: =pod
667:
668: =item get_student_answer
669:
670: Analyzes a homework problem for a particular student and returns the correct
671: answer. Attempts to put together an answer for problem types
672: that do not natively support it.
673:
674: Inputs: $resource: a resource object (from navmaps or hash from loncoursedata)
675: $sname, $sdom, $partid, $respid
676:
677: Returns: $answer
678:
679: If $partid and $respid are specified, $answer is simply a scalar containing
680: the correct answer for the response.
681:
682: If $partid or $respid are undefined, $answer will be a hash reference with
683: keys $partid.'.'.$respid.'.answer'.
684:
685: =cut
686:
687: #####################################################
688: #####################################################
689: sub get_student_answer {
690: my ($resource,$sname,$sdom,$partid,$respid) = @_;
691: #
692: if (ref($resource) ne 'HASH') {
693: my $res = $resource;
694: $resource = { 'src' => $res->src,
695: 'symb' => $res->symb,
696: 'parts' => $res->parts };
697: foreach my $part (@{$resource->{'parts'}}) {
698: $resource->{'partdata'}->{$part}->{'ResponseIds'}=
699: [$res->responseIds($part)];
700: }
701: }
702: #
703: my $analysis =
704: &analyze_problem_as_student($resource,$sname,$sdom);
1.29 matthew 705: my $answer;
1.8 matthew 706: foreach my $partid (@{$resource->{'parts'}}) {
1.6 matthew 707: my $partdata = $resource->{'partdata'}->{$partid};
708: foreach my $respid (@{$partdata->{'ResponseIds'}}) {
709: my $prefix = $partid.'.'.$respid;
710: my $key = $prefix.'.answer';
1.30 matthew 711: $answer->{$partid}->{$respid} =
712: &get_answer($prefix,$key,%$analysis);
1.6 matthew 713: }
1.8 matthew 714: }
1.30 matthew 715: my $returnvalue;
1.8 matthew 716: if (! defined($partid)) {
717: $returnvalue = $answer;
718: } elsif (! defined($respid)) {
719: $returnvalue = $answer->{$partid};
1.6 matthew 720: } else {
1.8 matthew 721: $returnvalue = $answer->{$partid}->{$respid};
1.6 matthew 722: }
723: return $returnvalue;
724: }
725:
726: sub get_answer {
727: my ($prefix,$key,%Answer) = @_;
728: my $returnvalue;
1.4 matthew 729: if (exists($Answer{$key})) {
730: my $student_answer = $Answer{$key}->[0];
731: if (! defined($student_answer)) {
732: $student_answer = $Answer{$key}->[1];
733: }
734: $returnvalue = $student_answer;
735: } else {
736: if (exists($Answer{$prefix.'.shown'})) {
737: # The response has foils
738: my %values;
739: while (my ($k,$v) = each(%Answer)) {
740: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
741: my $foilname = $2;
742: $values{$foilname}=$v;
743: }
744: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
745: if (ref($values{$foil}) eq 'ARRAY') {
1.10 albertel 746: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
747: join(',',map {&HTML::Entities::encode($_,'<>&"')} @{$values{$foil}}).'&';
1.4 matthew 748: } else {
1.10 albertel 749: $returnvalue.=&HTML::Entities::encode($foil,'<>&"').'='.
750: &HTML::Entities::encode($values{$foil},'<>&"').'&';
1.4 matthew 751: }
752: }
753: $returnvalue =~ s/ /\%20/g;
754: chop ($returnvalue);
755: }
756: }
757: return $returnvalue;
758: }
1.8 matthew 759:
760: #####################################################
761: #####################################################
762:
763: =pod
764:
765: =item Caching routines
766:
767: =over 4
768:
1.29 matthew 769: =item &load_analysis_cache($symb)
1.8 matthew 770:
771: Loads the cache for the given symb into memory from disk.
772: Requires the cache filename be set.
773: Only should be called by &ensure_proper_cache.
774:
775: =cut
776:
777: #####################################################
778: #####################################################
779: {
780: my $cache_filename = undef;
781: my $current_symb = undef;
782: my %cache;
783:
1.29 matthew 784: sub load_analysis_cache {
1.8 matthew 785: my ($symb) = @_;
786: return if (! defined($cache_filename));
787: if (! defined($current_symb) || $current_symb ne $symb) {
788: undef(%cache);
789: my $storedstring;
790: my %cache_db;
791: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_READER(),0640)) {
792: $storedstring = $cache_db{&Apache::lonnet::escape($symb)};
793: untie(%cache_db);
794: }
795: if (defined($storedstring)) {
796: %cache = %{thaw($storedstring)};
797: }
798: }
799: return;
800: }
801:
802: #####################################################
803: #####################################################
804:
805: =pod
806:
1.29 matthew 807: =item &get_from_analysis_cache($sname,$sdom,$symb,$partid,$respid)
1.8 matthew 808:
809: Returns the appropriate data from the cache, or undef if no data exists.
810:
811: =cut
812:
813: #####################################################
814: #####################################################
1.29 matthew 815: sub get_from_analysis_cache {
816: my ($sname,$sdom,$symb) = @_;
1.8 matthew 817: &ensure_proper_cache($symb);
818: my $returnvalue;
1.29 matthew 819: if (exists($cache{$sname.':'.$sdom})) {
820: $returnvalue = $cache{$sname.':'.$sdom};
1.8 matthew 821: } else {
822: $returnvalue = undef;
823: }
824: return $returnvalue;
825: }
826:
827: #####################################################
828: #####################################################
829:
830: =pod
831:
1.29 matthew 832: =item &write_analysis_cache($symb)
1.8 matthew 833:
834: Writes the in memory cache to disk so that it can be read in with
1.29 matthew 835: &load_analysis_cache($symb).
1.8 matthew 836:
837: =cut
838:
839: #####################################################
840: #####################################################
1.29 matthew 841: sub write_analysis_cache {
1.8 matthew 842: return if (! defined($current_symb) || ! defined($cache_filename));
843: my %cache_db;
844: my $key = &Apache::lonnet::escape($current_symb);
845: if (tie(%cache_db,'GDBM_File',$cache_filename,&GDBM_WRCREAT(),0640)) {
846: my $storestring = freeze(\%cache);
847: $cache_db{$key}=$storestring;
848: $cache_db{$key.'.time'}=time;
849: untie(%cache_db);
850: }
851: undef(%cache);
852: undef($current_symb);
853: undef($cache_filename);
854: return;
855: }
856:
857: #####################################################
858: #####################################################
859:
860: =pod
861:
862: =item &ensure_proper_cache($symb)
863:
864: Called to make sure we have the proper cache set up. This is called
1.29 matthew 865: prior to every analysis lookup.
1.8 matthew 866:
867: =cut
868:
869: #####################################################
870: #####################################################
871: sub ensure_proper_cache {
872: my ($symb) = @_;
873: my $cid = $ENV{'request.course.id'};
874: my $new_filename = '/home/httpd/perl/tmp/'.
1.29 matthew 875: 'problemanalysis_'.$cid.'_analysis_cache.db';
1.8 matthew 876: if (! defined($cache_filename) ||
877: $cache_filename ne $new_filename ||
878: ! defined($current_symb) ||
879: $current_symb ne $symb) {
880: $cache_filename = $new_filename;
881: # Notice: $current_symb is not set to $symb until after the cache is
1.29 matthew 882: # loaded. This is what tells &load_analysis_cache to load in a new
1.8 matthew 883: # symb cache.
1.29 matthew 884: &load_analysis_cache($symb);
1.8 matthew 885: $current_symb = $symb;
886: }
887: }
888:
889: #####################################################
890: #####################################################
891:
892: =pod
893:
1.29 matthew 894: =item &store_analysis($sname,$sdom,$symb,$partid,$respid,$dataset)
1.8 matthew 895:
1.29 matthew 896: Stores the analysis data in the in memory cache.
1.8 matthew 897:
898: =cut
899:
900: #####################################################
901: #####################################################
1.29 matthew 902: sub store_analysis {
903: my ($sname,$sdom,$symb,$dataset) = @_;
1.8 matthew 904: return if ($symb ne $current_symb);
1.29 matthew 905: $cache{$sname.':'.$sdom}=$dataset;
1.8 matthew 906: return;
907: }
908:
909: }
910: #####################################################
911: #####################################################
912:
913: =pod
914:
915: =back
916:
917: =cut
918:
919: #####################################################
920: #####################################################
1.4 matthew 921:
922: ##
923: ## The following is copied from datecalc1.pl, part of the
924: ## Spreadsheet::WriteExcel CPAN module.
925: ##
926: ##
927: ######################################################################
928: #
929: # Demonstration of writing date/time cells to Excel spreadsheets,
930: # using UNIX/Perl time as source of date/time.
931: #
932: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
933: #
934: ######################################################################
935: #
936: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
937: # measured in seconds.
938: #
939: # An Excel file can use exactly one of two different date/time systems.
940: # In these systems, a floating point number represents the number of days
941: # (and fractional parts of the day) since a start point. The floating point
942: # number is referred to as a 'serial'.
943: # The two systems ('1900' and '1904') use different starting points:
944: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
945: # a leap year - see:
946: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
947: # for the excuse^H^H^H^H^H^Hreason.
948: # '1904'; '1.00' is 2 Jan 1904.
949: #
950: # The '1904' system is the default for Apple Macs. Windows versions of
951: # Excel have the option to use the '1904' system.
952: #
953: # Note that Visual Basic's "DateSerial" function does NOT erroneously
954: # regard 1900 as a leap year, and thus its serials do not agree with
955: # the 1900 serials of Excel for dates before 1 Mar 1900.
956: #
957: # Note that StarOffice (at least at version 5.2) does NOT erroneously
958: # regard 1900 as a leap year, and thus its serials do not agree with
959: # the 1900 serials of Excel for dates before 1 Mar 1900.
960: #
961: ######################################################################
962: #
963: # Calculation description
964: # =======================
965: #
966: # 1900 system
967: # -----------
968: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
969: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
970: # were leap years with an extra day.
971: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
972: # 1 Jan 1970.
973: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
974: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
975: #
976: # 1904 system
977: # -----------
978: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
979: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
980: # were leap years with an extra day.
981: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
982: # 1 Jan 1970.
983: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
984: #
985: ######################################################################
986: #
987: # Copyright (c) 2000, Andrew Benham.
988: # This program is free software. It may be used, redistributed and/or
989: # modified under the same terms as Perl itself.
990: #
991: # Andrew Benham, adsb@bigfoot.com
992: # London, United Kingdom
993: # 11 Nov 2000
994: #
995: ######################################################################
996: #-----------------------------------------------------------
997: # calc_serial()
998: #
999: # Called with (up to) 2 parameters.
1000: # 1. Unix timestamp. If omitted, uses current time.
1001: # 2. GMT flag. Set to '1' to return serial in GMT.
1002: # If omitted, returns serial in appropriate timezone.
1003: #
1004: # Returns date/time serial according to $DATE_SYSTEM selected
1005: #-----------------------------------------------------------
1006: sub calc_serial {
1007: # Use 1900 date system on all platforms other than Apple Mac (for which
1008: # use 1904 date system).
1009: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
1010: my $time = (defined $_[0]) ? $_[0] : time();
1011: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
1012: #
1013: # Divide timestamp by number of seconds in a day.
1014: # This gives a date serial with '0' on 1 Jan 1970.
1015: my $serial = $time / 86400;
1016: #
1017: # Adjust the date serial by the offset appropriate to the
1018: # currently selected system (1900/1904).
1019: if ($DATE_SYSTEM == 0) { # use 1900 system
1020: $serial += 25569;
1021: } else { # use 1904 system
1022: $serial += 24107;
1023: }
1024: #
1025: unless ($gmtflag) {
1026: # Now have a 'raw' serial with the right offset. But this
1027: # gives a serial in GMT, which is false unless the timezone
1028: # is GMT. We need to adjust the serial by the appropriate
1029: # timezone offset.
1030: # Calculate the appropriate timezone offset by seeing what
1031: # the differences between localtime and gmtime for the given
1032: # time are.
1033: #
1034: my @gmtime = gmtime($time);
1035: my @ltime = localtime($time);
1036: #
1037: # For the first 7 elements of the two arrays, adjust the
1038: # date serial where the elements differ.
1039: for (0 .. 6) {
1040: my $diff = $ltime[$_] - $gmtime[$_];
1041: if ($diff) {
1042: $serial += _adjustment($diff,$_);
1043: }
1044: }
1045: }
1046: #
1047: # Perpetuate the error that 1900 was a leap year by decrementing
1048: # the serial if we're using the 1900 system and the date is prior to
1049: # 1 Mar 1900. This has the effect of making serial value '60'
1050: # 29 Feb 1900.
1051: #
1052: # This fix only has any effect if UNIX/Perl time on the platform
1053: # can represent 1900. Many can't.
1054: #
1055: unless ($DATE_SYSTEM) {
1056: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
1057: }
1058: return $serial;
1059: }
1060:
1061: sub _adjustment {
1062: # Based on the difference in the localtime/gmtime array elements
1063: # number, return the adjustment required to the serial.
1064: #
1065: # We only look at some elements of the localtime/gmtime arrays:
1066: # seconds unlikely to be different as all known timezones
1067: # have an offset of integral multiples of 15 minutes,
1068: # but it's easy to do.
1069: # minutes will be different for timezone offsets which are
1070: # not an exact number of hours.
1071: # hours very likely to be different.
1072: # weekday will differ when localtime/gmtime difference
1073: # straddles midnight.
1074: #
1075: # Assume that difference between localtime and gmtime is less than
1076: # 5 days, then don't have to do maths for day of month, month number,
1077: # year number, etc...
1078: #
1079: my ($delta,$element) = @_;
1080: my $adjust = 0;
1081: #
1082: if ($element == 0) { # Seconds
1083: $adjust = $delta/86400; # 60 * 60 * 24
1084: } elsif ($element == 1) { # Minutes
1085: $adjust = $delta/1440; # 60 * 24
1086: } elsif ($element == 2) { # Hours
1087: $adjust = $delta/24; # 24
1088: } elsif ($element == 6) { # Day of week number
1089: # Catch difference straddling Sat/Sun in either direction
1090: $delta += 7 if ($delta < -4);
1091: $delta -= 7 if ($delta > 4);
1092: #
1093: $adjust = $delta;
1094: }
1095: return $adjust;
1096: }
1097:
1098: ###########################################################
1099: ###########################################################
1100:
1101: =pod
1102:
1103: =item get_problem_data
1104:
1105: Returns a data structure describing the problem.
1106:
1107: Inputs: $url
1108:
1109: Returns: %Partdata
1110:
1111: =cut
1112:
1113: ## note: we must force each foil and option to not begin or end with
1114: ## spaces as they are stored without such data.
1115: ##
1116: ###########################################################
1117: ###########################################################
1118: sub get_problem_data {
1119: my ($url) = @_;
1120: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
1121: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
1122: my %Answer;
1123: %Answer=&Apache::lonnet::str2hash($Answ);
1124: my %Partdata;
1125: foreach my $part (@{$Answer{'parts'}}) {
1126: while (my($key,$value) = each(%Answer)) {
1127: #
1128: # Logging code:
1.7 matthew 1129: if (0) {
1.4 matthew 1130: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
1131: if (ref($value) eq 'ARRAY') {
1132: &Apache::lonnet::logthis(' @'.join(',',@$value));
1133: } else {
1134: &Apache::lonnet::logthis(' '.$value);
1135: }
1136: }
1137: # End of logging code
1138: next if ($key !~ /^$part/);
1139: $key =~ s/^$part\.//;
1140: if (ref($value) eq 'ARRAY') {
1141: if ($key eq 'options') {
1142: $Partdata{$part}->{'_Options'}=$value;
1143: } elsif ($key eq 'concepts') {
1144: $Partdata{$part}->{'_Concepts'}=$value;
1.28 matthew 1145: } elsif ($key eq 'items') {
1146: $Partdata{$part}->{'_Items'}=$value;
1.4 matthew 1147: } elsif ($key =~ /^concept\.(.*)$/) {
1148: my $concept = $1;
1149: foreach my $foil (@$value) {
1150: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
1151: $concept;
1152: }
1.32 matthew 1153: } elsif ($key =~ /^(unit|incorrect|answer|ans_low|ans_high|str_type)$/) {
1.4 matthew 1154: $Partdata{$part}->{$key}=$value;
1155: }
1156: } else {
1157: if ($key=~ /^foil\.text\.(.*)$/) {
1158: my $foil = $1;
1159: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
1160: $value =~ s/(\s*$|^\s*)//g;
1161: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
1162: } elsif ($key =~ /^foil\.value\.(.*)$/) {
1163: my $foil = $1;
1164: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
1.28 matthew 1165: } elsif ($key eq 'answercomputed') {
1166: $Partdata{$part}->{'answercomputed'} = $value;
1.4 matthew 1167: }
1168: }
1169: }
1170: }
1.28 matthew 1171: # Further debugging code
1172: if (0) {
1173: &Apache::lonnet::logthis('lonstathelpers::get_problem_data');
1174: &log_hash_ref(\%Partdata);
1175: }
1.4 matthew 1176: return %Partdata;
1.5 matthew 1177: }
1178:
1.28 matthew 1179: sub log_array_ref {
1180: my ($arrayref,$prefix) = @_;
1181: return if (ref($arrayref) ne 'ARRAY');
1182: if (! defined($prefix)) { $prefix = ''; };
1183: foreach my $v (@$arrayref) {
1184: if (ref($v) eq 'ARRAY') {
1185: &log_array_ref($v,$prefix.' ');
1186: } elsif (ref($v) eq 'HASH') {
1187: &log_hash_ref($v,$prefix.' ');
1188: } else {
1189: &Apache::lonnet::logthis($prefix.'"'.$v.'"');
1190: }
1191: }
1192: }
1193:
1194: sub log_hash_ref {
1195: my ($hashref,$prefix) = @_;
1196: return if (ref($hashref) ne 'HASH');
1197: if (! defined($prefix)) { $prefix = ''; };
1198: while (my ($k,$v) = each(%$hashref)) {
1199: if (ref($v) eq 'ARRAY') {
1200: &Apache::lonnet::logthis($prefix.'"'.$k.'" = array');
1201: &log_array_ref($v,$prefix.' ');
1202: } elsif (ref($v) eq 'HASH') {
1203: &Apache::lonnet::logthis($prefix.'"'.$k.'" = hash');
1204: &log_hash_ref($v,$prefix.' ');
1205: } else {
1206: &Apache::lonnet::logthis($prefix.'"'.$k.'" => "'.$v.'"');
1207: }
1208: }
1209: }
1.5 matthew 1210: ####################################################
1211: ####################################################
1212:
1213: =pod
1214:
1215: =item &limit_by_time()
1216:
1217: =cut
1218:
1219: ####################################################
1220: ####################################################
1221: sub limit_by_time_form {
1222: my $Starttime_form = '';
1223: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1224: ('limitby_startdate');
1225: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1226: ('limitby_enddate');
1227: if (! defined($endtime)) {
1228: $endtime = time;
1229: }
1230: if (! defined($starttime)) {
1231: $starttime = $endtime - 60*60*24*7;
1232: }
1233: my $state;
1234: if (&limit_by_time()) {
1235: $state = '';
1236: } else {
1237: $state = 'disabled';
1238: }
1239: my $startdateform = &Apache::lonhtmlcommon::date_setter
1240: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
1241: my $enddateform = &Apache::lonhtmlcommon::date_setter
1242: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
1243: my $Str;
1244: $Str .= '<script language="Javascript" >';
1245: $Str .= 'function toggle_limitby_activity(state) {';
1246: $Str .= ' if (state) {';
1247: $Str .= ' limitby_startdate_enable();';
1248: $Str .= ' limitby_enddate_enable();';
1249: $Str .= ' } else {';
1250: $Str .= ' limitby_startdate_disable();';
1251: $Str .= ' limitby_enddate_disable();';
1252: $Str .= ' }';
1253: $Str .= '}';
1254: $Str .= '</script>';
1255: $Str .= '<fieldset>';
1256: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
1257: if (&limit_by_time()) {
1258: $timecheckbox .= ' checked ';
1259: }
1260: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
1261: $timecheckbox .= ' />';
1262: $Str .= '<legend>'.&mt('[_1] Limit by time',$timecheckbox).'</legend>';
1263: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
1264: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
1265: $Str .= '</fieldset>';
1266: return $Str;
1267: }
1268:
1269: sub limit_by_time {
1270: if (exists($ENV{'form.limit_by_time'}) &&
1271: $ENV{'form.limit_by_time'} ne '' ) {
1272: return 1;
1273: } else {
1274: return 0;
1275: }
1276: }
1277:
1278: sub get_time_limits {
1279: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1280: ('limitby_startdate');
1281: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1282: ('limitby_enddate');
1283: return ($starttime,$endtime);
1.11 matthew 1284: }
1285:
1286:
1287:
1288: ####################################################
1289: ####################################################
1290:
1291: =pod
1292:
1293: =item sections_description
1294:
1295: Inputs: @Sections, an array of sections
1296:
1297: Returns: A text description of the sections selected.
1298:
1299: =cut
1300:
1301: ####################################################
1302: ####################################################
1303: sub sections_description {
1304: my @Sections = @_;
1305: my $sectionstring = '';
1306: if (scalar(@Sections) > 1) {
1307: if (scalar(@Sections) > 2) {
1308: my $last = pop(@Sections);
1309: $sectionstring = "Sections ".join(', ',@Sections).', and '.$last;
1310: } else {
1311: $sectionstring = "Sections ".join(' and ',@Sections);
1312: }
1313: } else {
1314: if ($Sections[0] eq 'all') {
1315: $sectionstring = "All sections";
1316: } else {
1317: $sectionstring = "Section ".$Sections[0];
1318: }
1319: }
1320: return $sectionstring;
1.2 matthew 1321: }
1322:
1323: ####################################################
1324: ####################################################
1325:
1326: =pod
1327:
1.12 matthew 1328: =item &manage_caches
1329:
1330: Inputs: $r, apache request object
1331:
1332: Returns: An array of scalars containing html for buttons.
1333:
1334: =cut
1335:
1336: ####################################################
1337: ####################################################
1338: sub manage_caches {
1.23 matthew 1339: my ($r,$formname,$inputname,$update_message) = @_;
1.12 matthew 1340: &Apache::loncoursedata::clear_internal_caches();
1.16 matthew 1341: my $sectionkey =
1342: join(',',
1343: map {
1344: &Apache::lonnet::escape($_);
1345: } sort(@Apache::lonstatistics::SelectedSections)
1346: );
1347: my $statuskey = $Apache::lonstatistics::enrollment_status;
1.12 matthew 1348: if (exists($ENV{'form.ClearCache'}) ||
1.16 matthew 1349: exists($ENV{'form.updatecaches'}) ||
1350: (exists($ENV{'form.firstrun'}) && $ENV{'form.firstrun'} ne 'no') ||
1351: (exists($ENV{'form.prevsection'}) &&
1352: $ENV{'form.prevsection'} ne $sectionkey) ||
1353: (exists($ENV{'form.prevenrollstatus'}) &&
1354: $ENV{'form.prevenrollstatus'} ne $statuskey)
1355: ) {
1.23 matthew 1356: if (defined($update_message)) {
1357: $r->print($update_message);
1358: }
1.40 matthew 1359: if (0) {
1360: &Apache::lonnet::logthis('Updating mysql student data caches');
1361: }
1.36 matthew 1362: &gather_full_student_data($r,$formname,$inputname);
1.12 matthew 1363: }
1364: #
1.16 matthew 1365: my @Buttons =
1366: ('<input type="submit" name="ClearCache" '.
1367: 'value="'.&mt('Clear Caches').'" />',
1368: '<input type="submit" name="updatecaches" '.
1.17 matthew 1369: 'value="'.&mt('Update Caches').'" />'.
1370: &Apache::loncommon::help_open_topic('Statistics_Cache'),
1.16 matthew 1371: '<input type="hidden" name="prevsection" value="'.$sectionkey.'" />',
1372: '<input type="hidden" name="prevenrollstatus" value="'.$statuskey.'" />'
1373: );
1374: #
1.12 matthew 1375: if (! exists($ENV{'form.firstrun'})) {
1376: $r->print('<input type="hidden" name="firstrun" value="yes" />');
1377: } else {
1378: $r->print('<input type="hidden" name="firstrun" value="no" />');
1379: }
1380: #
1381: return @Buttons;
1382: }
1383:
1.36 matthew 1384: sub gather_full_student_data {
1385: my ($r,$formname,$inputname) = @_;
1386: my $status_type;
1387: if (defined($formname)) {
1388: $status_type = 'inline';
1389: } else {
1390: $status_type = 'popup';
1391: }
1392: my $c = $r->connection();
1393: #
1394: &Apache::loncoursedata::clear_internal_caches();
1395: #
1396: my @Students = @Apache::lonstatistics::Students;
1397: #
1398: # Open the progress window
1399: my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
1400: ($r,&mt('Student Data Compilation Status'),
1401: &mt('Student Data Compilation Progress'), scalar(@Students),
1402: $status_type,undef,$formname,$inputname);
1403: #
1404: while (my $student = shift @Students) {
1405: return if ($c->aborted());
1406: my $status = &Apache::loncoursedata::ensure_current_full_data
1407: ($student->{'username'},$student->{'domain'},
1408: $ENV{'request.course.id'});
1409: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
1410: &mt('last student'));
1411: }
1412: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1413: $r->rflush();
1414: return;
1415: }
1.12 matthew 1416:
1.38 matthew 1417: ####################################################
1418: ####################################################
1419:
1420: =pod
1421:
1422: =item &submission_report_form
1423:
1424: Input: The originating reportSelected value for the current stats page.
1425:
1426: Output: Scalar containing HTML with needed form elements and a link to
1427: the student submission reports page.
1428:
1429: =cut
1430:
1431: ####################################################
1432: ####################################################
1433: sub submission_report_form {
1434: my ($original_report) = @_;
1435: # Note: In the link below we change the reportSelected value. If
1436: # the user hits the 'back' button on the browser after getting their
1437: # student submissions report, this value may still be around. So we
1438: # output a script block to set it properly. If the $original_report
1439: # value is unset, you are just asking for trouble.
1440: if (! defined($original_report)) {
1441: &Apache::lonnet::logthis
1442: ('someone called lonstathelpers::submission_report_form without '.
1443: ' enough input.');
1444: }
1445: my $html = $/.
1446: '<script type="Text/JavaScript">'.
1447: "document.Statistics.reportSelected.value='$original_report';".
1448: '</script>'.
1449: '<input type="hidden" name="correctans" value="true" />'.
1450: '<input type="hidden" name="prob_status" value="true" />'.
1451: '<input type="hidden" name="all_sub" value="true" />';
1452: my $output_selector = $/.'<select name="output">'.$/;
1453: foreach ('HTML','Excel','CSV') {
1454: $output_selector .= ' <option value="'.lc($_).'"';
1455: if ($ENV{'form.output'} eq lc($_)) {
1456: $output_selector .= ' selected ';
1457: }
1458: $output_selector .='>'.&mt($_).'</option>'.$/;
1459: }
1460: $output_selector .= '</select>'.$/;
1461: my $link = '<a href="javascript:'.
1462: q{document.Statistics.reportSelected.value='student_submission_reports';}.
1463: 'document.Statistics.submit();">';
1464: $html.= &mt('View data as [_1] [_2]go[_3]',$output_selector,
1465: $link,'</a>').$/;
1466: return $html
1467: }
1.12 matthew 1468:
1469: ####################################################
1470: ####################################################
1471:
1472: =pod
1473:
1.2 matthew 1474: =back
1475:
1476: =cut
1477:
1478: ####################################################
1479: ####################################################
1.1 matthew 1480:
1481: 1;
1482:
1483: __END__
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