1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstatistics.pm,v 1.74 2003/06/03 18:10:33 matthew Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: # (Navigate problems for statistical reports
28: #
29: ###
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonstatistics
36:
37: =head1 SYNOPSIS
38:
39: Main handler for statistics and chart.
40:
41: =head1 PACKAGES USED
42:
43: use strict;
44: use Apache::Constants qw(:common :http);
45: use Apache::lonnet();
46: use Apache::lonhomework;
47: use Apache::loncommon;
48: use Apache::loncoursedata;
49: use Apache::lonhtmlcommon;
50: use Apache::lonproblemanalysis;
51: use Apache::lonproblemstatistics;
52: use Apache::lonstudentassessment;
53: use Apache::lonpercentage;
54: use Apache::lonmysql;
55: =over 4
56:
57: =cut
58:
59: package Apache::lonstatistics;
60:
61: use strict;
62: use Apache::Constants qw(:common :http);
63: use vars qw(
64: @FullClasslist
65: @Students
66: @Sections
67: @SelectedSections
68: %StudentData
69: @StudentDataOrder
70: @SelectedStudentData
71: $top_map
72: @Sequences
73: @SelectedMaps
74: @Assessments);
75:
76: use Apache::lonnet();
77: use Apache::lonhomework;
78: use Apache::loncommon;
79: use Apache::loncoursedata;
80: use Apache::lonhtmlcommon;
81: use Apache::lonproblemanalysis();
82: use Apache::lonproblemstatistics();
83: use Apache::lonstudentassessment();
84: use Apache::lonpercentage;
85: use Apache::lonmysql;
86: use Time::HiRes;
87:
88: #######################################################
89: #######################################################
90:
91: =pod
92:
93: =item Package Variables
94:
95: =item @FullClasslist The full classlist
96:
97: =item @Students The students we are concerned with for this invocation
98:
99: =item @Sections The sections available in this class
100:
101: =item $curr_student The student currently being examined
102:
103: =item $prev_student The student previous in the classlist
104:
105: =item $next_student The student next in the classlist
106:
107: =over
108:
109: =cut
110:
111: #######################################################
112: #######################################################
113: #
114: # Classlist variables
115: #
116: my $curr_student;
117: my $prev_student;
118: my $next_student;
119:
120: #######################################################
121: #######################################################
122:
123: =pod
124:
125: =item &clear_classlist_variables()
126:
127: undef the following package variables:
128:
129: =over
130:
131: =item @FullClasslist
132:
133: =item @Students
134:
135: =item @Sections
136:
137: =item @SelectedSections
138:
139: =item %StudentData
140:
141: =item @StudentDataOrder
142:
143: =item @SelectedStudentData
144:
145: =item $curr_student
146:
147: =item $prev_student
148:
149: =item $next_student
150:
151: =back
152:
153: =cut
154:
155: #######################################################
156: #######################################################
157: sub clear_classlist_variables {
158: undef(@FullClasslist);
159: undef(@Students);
160: undef(@Sections);
161: undef(@SelectedSections);
162: undef(%StudentData);
163: undef(@SelectedStudentData);
164: undef($curr_student);
165: undef($prev_student);
166: undef($next_student);
167: }
168:
169: #######################################################
170: #######################################################
171:
172: =pod
173:
174: =item &PrepareClasslist()
175:
176: Build up the classlist information. The classlist information is kept in
177: the following package variables:
178:
179: =over
180:
181: =item @FullClasslist
182:
183: =item @Students
184:
185: =item @Sections
186:
187: =item @SelectedSections
188:
189: =item %StudentData
190:
191: =item @SelectedStudentData
192:
193: =item $curr_student
194:
195: =item $prev_student
196:
197: =item $next_student
198:
199: =back
200:
201: $curr_student, $prev_student, and $next_student may not be defined, depending
202: upon the calling context.
203:
204: =cut
205:
206: #######################################################
207: #######################################################
208: sub PrepareClasslist {
209: my %Sections;
210: &clear_classlist_variables();
211: #
212: # Retrieve the classlist
213: my $cid = $ENV{'request.course.id'};
214: my $cdom = $ENV{'course.'.$cid.'.domain'};
215: my $cnum = $ENV{'course.'.$cid.'.num'};
216: my ($classlist,$field_names) = &Apache::loncoursedata::get_classlist($cid,
217: $cdom,$cnum);
218: if (exists($ENV{'form.Section'})) {
219: if (ref($ENV{'form.Section'})) {
220: @SelectedSections = @{$ENV{'form.Section'}};
221: } elsif ($ENV{'form.Section'} !~ /^\s*$/) {
222: @SelectedSections = ($ENV{'form.Section'});
223: }
224: }
225: @SelectedSections = ('all') if (! @SelectedSections);
226: foreach (@SelectedSections) {
227: if ($_ eq 'all') {
228: @SelectedSections = ('all');
229: }
230: }
231: #
232: # Deal with instructors with restricted section access
233: if ($ENV{'request.course.sec'} !~ /^\s*$/) {
234: @SelectedSections = ($ENV{'request.course.sec'});
235: }
236: #
237: # Set up %StudentData
238: @StudentDataOrder = qw/fullname username domain id section status/;
239: foreach my $field (@StudentDataOrder) {
240: $StudentData{$field}->{'title'} = $field;
241: $StudentData{$field}->{'base_width'} = length($field);
242: $StudentData{$field}->{'width'} =
243: $StudentData{$field}->{'base_width'};
244: }
245: #
246: # get the status requested
247: my $requested_status = 'Active';
248: $requested_status = $ENV{'form.Status'} if (exists($ENV{'form.Status'}));
249: #
250: # Process the classlist
251: while (my ($student,$student_data) = each (%$classlist)) {
252: my $studenthash = ();
253: for (my $i=0; $i< scalar(@$field_names);$i++) {
254: my $field = $field_names->[$i];
255: # Store the data
256: $studenthash->{$field}=$student_data->[$i];
257: # Keep track of the width of the fields
258: next if (! exists($StudentData{$field}));
259: my $length = length($student_data->[$i]);
260: if ($StudentData{$field}->{'width'} < $length) {
261: $StudentData{$field}->{'width'} = $length;
262: }
263: }
264: push (@FullClasslist,$studenthash);
265: #
266: # Build up a list of sections
267: my $section = $studenthash->{'section'};
268: if (! defined($section) || $section =~/^\s*$/ || $section == -1) {
269: $studenthash->{'section'} = 'none';
270: $section = $studenthash->{'section'};
271: }
272: $Sections{$section}++;
273: #
274: # Only put in the list those students we are interested in
275: foreach my $sect (@SelectedSections) {
276: if ( (($sect eq 'all') ||
277: ($section eq $sect)) &&
278: (($studenthash->{'status'} eq $requested_status) ||
279: ($requested_status eq 'Any'))
280: ){
281: push (@Students,$studenthash);
282: last;
283: }
284: }
285: }
286: #
287: # Put the consolidated section data in the right place
288: if ($ENV{'request.course.sec'} !~ /^\s*$/) {
289: @Sections = ($ENV{'request.course.sec'});
290: } else {
291: @Sections = sort {$a cmp $b} keys(%Sections);
292: unshift(@Sections,'all'); # Put 'all' at the front of the list
293: }
294: #
295: # Sort the Students
296: my $sortby = 'fullname';
297: $sortby = $ENV{'form.sort'} if (exists($ENV{'form.sort'}));
298: my @TmpStudents = sort { $a->{$sortby} cmp $b->{$sortby} ||
299: $a->{'fullname'} cmp $b->{'fullname'} } @Students;
300: @Students = @TmpStudents;
301: #
302: # Now deal with that current student thing....
303: $curr_student = undef;
304: if (exists($ENV{'form.SelectedStudent'})) {
305: my ($current_uname,$current_dom) =
306: split(':',$ENV{'form.SelectedStudent'});
307: my $i;
308: for ($i = 0; $i<=$#Students; $i++) {
309: next if (($Students[$i]->{'username'} ne $current_uname) ||
310: ($Students[$i]->{'domain'} ne $current_dom));
311: $curr_student = $Students[$i];
312: last; # If we get here, we have our student.
313: }
314: if (defined($curr_student)) {
315: if ($i == 0) {
316: $prev_student = undef;
317: } else {
318: $prev_student = $Students[$i-1];
319: }
320: if ($i == $#Students) {
321: $next_student = undef;
322: } else {
323: $next_student = $Students[$i+1];
324: }
325: }
326: }
327: #
328: if (exists($ENV{'form.StudentData'})) {
329: if (ref($ENV{'form.StudentData'}) eq 'ARRAY') {
330: @SelectedStudentData = @{$ENV{'form.StudentData'}};
331: } else {
332: @SelectedStudentData = ($ENV{'form.StudentData'});
333: }
334: } else {
335: @SelectedStudentData = ('username');
336: }
337: foreach (@SelectedStudentData) {
338: if ($_ eq 'all') {
339: @SelectedStudentData = ('all');
340: last;
341: }
342: }
343: #
344: return;
345: }
346:
347:
348: #######################################################
349: #######################################################
350:
351: =pod
352:
353: =item get_students
354:
355: Returns a list of the selected students
356:
357: =cut
358:
359: #######################################################
360: #######################################################
361: sub get_students {
362: if (! @Students) {
363: &PrepareClasslist()
364: }
365: return @Students;
366: }
367:
368: #######################################################
369: #######################################################
370:
371: =pod
372:
373: =item ¤t_student()
374:
375: Returns a pointer to a hash containing data about the currently
376: selected student.
377:
378: =cut
379:
380: #######################################################
381: #######################################################
382: sub current_student {
383: return $curr_student;
384: }
385:
386: #######################################################
387: #######################################################
388:
389: =pod
390:
391: =item &previous_student()
392:
393: Returns a pointer to a hash containing data about the student prior
394: in the list of students. Or something.
395:
396: =cut
397:
398: #######################################################
399: #######################################################
400: sub previous_student {
401: return $prev_student;
402: }
403:
404: #######################################################
405: #######################################################
406:
407: =pod
408:
409: =item &next_student()
410:
411: Returns a pointer to a hash containing data about the next student
412: to be viewed.
413:
414: =cut
415:
416: #######################################################
417: #######################################################
418: sub next_student {
419: return $next_student;
420: }
421:
422: #######################################################
423: #######################################################
424:
425: =pod
426:
427: =item &clear_sequence_variables()
428:
429: =cut
430:
431: #######################################################
432: #######################################################
433: sub clear_sequence_variables {
434: undef($top_map);
435: undef(@Sequences);
436: undef(@Assessments);
437: }
438:
439: #######################################################
440: #######################################################
441:
442: =pod
443:
444: =item &SetSelectedMaps($elementname)
445:
446: Sets the @SelectedMaps array from $ENV{'form.'.$elementname};
447:
448: =cut
449:
450: #######################################################
451: #######################################################
452: sub SetSelectedMaps {
453: my $elementname = shift;
454: if (exists($ENV{'form.'.$elementname})) {
455: if (ref($ENV{'form.'.$elementname})) {
456: @SelectedMaps = @{$ENV{'form.'.$elementname}};
457: } else {
458: @SelectedMaps = ($ENV{'form.'.$elementname});
459: }
460: } else {
461: @SelectedMaps = ('all');
462: }
463: }
464:
465:
466: #######################################################
467: #######################################################
468:
469: =pod
470:
471: =item &Sequences_with_Assess()
472:
473: Returns an array containing the subset of @Sequences which contain
474: assessments.
475:
476: =cut
477:
478: #######################################################
479: #######################################################
480: sub Sequences_with_Assess {
481: my @Sequences_to_Show;
482: foreach my $map_symb (@SelectedMaps) {
483: foreach my $sequence (@Sequences) {
484: next if ($sequence->{'symb'} ne $map_symb && $map_symb ne 'all');
485: next if ($sequence->{'num_assess'} < 1);
486: push (@Sequences_to_Show,$sequence);
487: }
488: }
489: return @Sequences_to_Show;
490: }
491:
492: #######################################################
493: #######################################################
494:
495: =pod
496:
497: =item &PrepareCourseData($r)
498:
499: =cut
500:
501: #######################################################
502: #######################################################
503: sub PrepareCourseData {
504: my ($r) = @_;
505: &clear_sequence_variables();
506: my ($top,$sequences,$assessments) =
507: &Apache::loncoursedata::get_sequence_assessment_data();
508: if (! defined($top) || ! ref($top)) {
509: # There has been an error, better report it
510: &Apache::lonnet::logthis('top is undefined');
511: return;
512: }
513: $top_map = $top if (ref($top));
514: @Sequences = @{$sequences} if (ref($sequences) eq 'ARRAY');
515: @Assessments = @{$assessments} if (ref($assessments) eq 'ARRAY');
516: #
517: # Compute column widths
518: foreach my $seq (@Sequences) {
519: my $name_length = length($seq->{'title'});
520: my $num_parts = $seq->{'num_assess_parts'};
521: #
522: # The number of columns needed for the summation text:
523: # " 1/5" = 1+3 columns, " 10/99" = 1+5 columns
524: my $sum_length = 1+1+2*(length($num_parts));
525: my $num_col = $num_parts+$sum_length;
526: if ($num_col < $name_length) {
527: $num_col = $name_length;
528: }
529: $seq->{'base_width'} = $name_length;
530: $seq->{'width'} = $num_col;
531: }
532: return;
533: }
534:
535: #######################################################
536: #######################################################
537:
538: =pod
539:
540: =item &log_sequence($sequence,$recursive,$padding)
541:
542: Write data about the sequence to a logfile. If $recursive is not
543: undef the data is written recursively. $padding is used for recursive
544: calls.
545:
546: =cut
547:
548: #######################################################
549: #######################################################
550: sub log_sequence {
551: my ($seq,$recursive,$padding) = @_;
552: $padding = '' if (! defined($padding));
553: if (ref($seq) ne 'HASH') {
554: &Apache::lonnet::logthis('log_sequence passed bad sequnce');
555: return;
556: }
557: &Apache::lonnet::logthis($padding.'sequence '.$seq->{'title'});
558: while (my($key,$value) = each(%$seq)) {
559: next if ($key eq 'contents');
560: if (ref($value) eq 'ARRAY') {
561: for (my $i=0;$i< scalar(@$value);$i++) {
562: &Apache::lonnet::logthis($padding.$key.'['.$i.']='.
563: $value->[$i]);
564: }
565: } else {
566: &Apache::lonnet::logthis($padding.$key.'='.$value);
567: }
568: }
569: if (defined($recursive)) {
570: &Apache::lonnet::logthis($padding.'-'x20);
571: &Apache::lonnet::logthis($padding.'contains:');
572: foreach my $item (@{$seq->{'contents'}}) {
573: if ($item->{'type'} eq 'container') {
574: &log_sequence($item,$recursive,$padding.' ');
575: } else {
576: &Apache::lonnet::logthis($padding.'title = '.$item->{'title'});
577: while (my($key,$value) = each(%$item)) {
578: next if ($key eq 'title');
579: if (ref($value) eq 'ARRAY') {
580: for (my $i=0;$i< scalar(@$value);$i++) {
581: &Apache::lonnet::logthis($padding.$key.'['.$i.']='.
582: $value->[$i]);
583: }
584: } else {
585: &Apache::lonnet::logthis($padding.$key.'='.$value);
586: }
587: }
588: }
589: }
590: &Apache::lonnet::logthis($padding.'end contents of '.$seq->{'title'});
591: &Apache::lonnet::logthis($padding.'-'x20);
592: }
593: return;
594: }
595:
596: ##############################################
597: ##############################################
598:
599: =pod
600:
601: =item &StudentDataSelect($elementname,$status,$numvisible,$selected)
602:
603: Returns html for a selection box allowing the user to choose one (or more)
604: of the fields of student data available (fullname, username, id, section, etc)
605:
606: =over 4
607:
608: =item $elementname The name of the HTML form element
609:
610: =item $status 'multiple' or 'single' selection box
611:
612: =item $numvisible The number of options to be visible
613:
614: =back
615:
616: =cut
617:
618: ##############################################
619: ##############################################
620: sub StudentDataSelect {
621: my ($elementname,$status,$numvisible)=@_;
622: if ($numvisible < 1) {
623: return;
624: }
625: #
626: # Build the form element
627: my $Str = "\n";
628: $Str .= '<select name="'.$elementname.'" ';
629: if ($status ne 'single') {
630: $Str .= 'multiple="true" ';
631: }
632: $Str .= 'size="'.$numvisible.'" >'."\n";
633: #
634: # Deal with 'all'
635: $Str .= ' <option value="all" ';
636: foreach (@SelectedStudentData) {
637: if ($_ eq 'all') {
638: $Str .= 'selected ';
639: last;
640: }
641: }
642: $Str .= ">all</option>\n";
643: #
644: # Loop through the student data fields
645: foreach my $item (@StudentDataOrder) {
646: $Str .= ' <option value="'.$item.'" ';
647: foreach (@SelectedStudentData) {
648: if ($item eq $_ ) {
649: $Str .= 'selected ';
650: last;
651: }
652: }
653: $Str .= '>'.$item."</option>\n";
654: }
655: $Str .= "</select>\n";
656: return $Str;
657: }
658:
659: ##############################################
660: ##############################################
661:
662: =pod
663:
664: =item &MapSelect($elementname,$status,$numvisible,$restriction)
665:
666: Returns html for a selection box allowing the user to choose one (or more)
667: of the sequences in the course. The values of the sequences are the symbs.
668: If the top sequence is selected, the value 'top' will result.
669:
670: =over 4
671:
672: =item $elementname The name of the HTML form element
673:
674: =item $status 'multiple' or 'single' selection box
675:
676: =item $numvisible The number of options to be visible
677:
678: =item $restriction Code reference to subroutine which returns true or
679: false. The code must expect a reference to a sequence data structure.
680:
681: =back
682:
683: =cut
684:
685: ##############################################
686: ##############################################
687: sub MapSelect {
688: my ($elementname,$status,$numvisible,$restriction)=@_;
689: if ($numvisible < 1) {
690: return;
691: }
692: #
693: # Set up array of selected items
694: &SetSelectedMaps($elementname);
695: #
696: # Set up the restriction call
697: if (! defined($restriction)) {
698: $restriction = sub { 1; };
699: }
700: #
701: # Build the form element
702: my $Str = "\n";
703: $Str .= '<select name="'.$elementname.'" ';
704: if ($status ne 'single') {
705: $Str .= 'multiple="true" ';
706: }
707: $Str .= 'size="'.$numvisible.'" >'."\n";
708: #
709: # Deal with 'all'
710: foreach (@SelectedMaps) {
711: if ($_ eq 'all') {
712: @SelectedMaps = ('all');
713: last;
714: }
715: }
716: #
717: # Put in option for 'all'
718: $Str .= ' <option value="all" ';
719: foreach (@SelectedMaps) {
720: if ($_ eq 'all') {
721: $Str .= 'selected ';
722: last;
723: }
724: }
725: $Str .= ">all</option>\n";
726: #
727: # Loop through the sequences
728: foreach my $seq (@Sequences) {
729: next if (! $restriction->($seq));
730: $Str .= ' <option value="'.$seq->{'symb'}.'" ';
731: foreach (@SelectedMaps) {
732: if ($seq->{'symb'} eq $_) {
733: $Str .= 'selected ';
734: last;
735: }
736: }
737: $Str .= '>'.$seq->{'title'}."</option>\n";
738: }
739: $Str .= "</select>\n";
740: return $Str;
741: }
742:
743: ##############################################
744: ##############################################
745:
746: =pod
747:
748: =item &SectionSelect($elementname,$status,$numvisible)
749:
750: Returns html for a selection box allowing the user to choose one (or more)
751: of the sections in the course.
752:
753: Uses the package variables @Sections and @SelectedSections
754: =over 4
755:
756: =item $elementname The name of the HTML form element
757:
758: =item $status 'multiple' or 'single' selection box
759:
760: =item $numvisible The number of options to be visible
761:
762: =back
763:
764: =cut
765:
766: ##############################################
767: ##############################################
768: sub SectionSelect {
769: my ($elementname,$status,$numvisible)=@_;
770: if ($numvisible < 1) {
771: return;
772: }
773: #
774: # Make sure we have the data we need to continue
775: if (! @Sections) {
776: &PrepareClasslist()
777: }
778: #
779: # Build the form element
780: my $Str = "\n";
781: $Str .= '<select name="'.$elementname.'" ';
782: if ($status ne 'single') {
783: $Str .= 'multiple="true" ';
784: }
785: $Str .= 'size="'.$numvisible.'" >'."\n";
786: #
787: # Loop through the sequences
788: foreach my $s (@Sections) {
789: $Str .= ' <option value="'.$s.'" ';
790: foreach (@SelectedSections) {
791: if ($s eq $_) {
792: $Str .= 'selected ';
793: last;
794: }
795: }
796: $Str .= '>'.$s."</option>\n";
797: }
798: $Str .= "</select>\n";
799: return $Str;
800: }
801:
802: ##################################################
803: ##################################################
804: sub DisplayClasslist {
805: my ($r)=@_;
806: #
807: my @Fields = ('fullname','username','domain','id','section');
808: #
809: my $Str='';
810: $Str .= '<table border="0"><tr><td bgcolor="#777777">'."\n";
811: $Str .= '<table border="0" cellpadding="3"><tr bgcolor="#e6ffff">'."\n";
812: foreach my $field (@Fields) {
813: $Str .= '<th><a href="/adm/statistics?reportSelected=classlist&sort='.$field.'">'.$field.
814: '</a></th>';
815: }
816: $Str .= '</tr>'."\n";
817: #
818: my $alternate = 0;
819: foreach my $student (@Students) { # @Students is a package variable
820: my $sname = $student->{'username'}.':'.$student->{'domain'};
821: if($alternate) {
822: $Str .= '<tr bgcolor="#ffffe6">';
823: } else {
824: $Str .= '<tr bgcolor="#ffffc6">';
825: }
826: $alternate = ($alternate + 1) % 2;
827: #
828: foreach my $field (@Fields) {
829: $Str .= '<td>';
830: if ($field eq 'fullname') {
831: $Str .= '<a href="/adm/statistics?reportSelected=';
832: $Str .= &Apache::lonnet::escape('student_assessment');
833: $Str .= '&sort='.&Apache::lonnet::escape($ENV{'form.sort'});
834: $Str .= '&SelectedStudent=';
835: $Str .= &Apache::lonnet::escape($sname).'">';
836: $Str .= $student->{$field}.' ';
837: $Str .= '</a>';
838: } else {
839: $Str .= $student->{$field};
840: }
841: $Str .= '</td>';
842: }
843: $Str .= "</tr>\n";
844: }
845: $Str .= '</table></td></tr></table>'."\n";
846: #
847: $r->print($Str);
848: $r->rflush();
849: #
850: return;
851: }
852:
853: ##############################################
854: ##############################################
855: sub CreateMainMenu {
856: my ($status,$reports,$current)=@_;
857: #
858: my $Str = '';
859: #
860: $Str .= '<table border="0"><tbody><tr>'."\n";
861: $Str .= '<td></td>'."\n";
862: $Str .= '<td align="center"><b>Select a Report</b></td>'."\n";
863: $Str .= '<td></td>'."\n";
864: $Str .= '<td></td>'."\n";
865: $Str .= '<tr>'."\n";
866: #
867: $Str .= '<td align="center">'.
868: '<input type="submit" name="Refresh" value="Update Display" />'.
869: "</td>\n";
870: #
871: $Str .= '<td align="center">';
872: $Str .= '<select name="reportSelected" >'."\n";
873: foreach (sort(keys(%$reports))) {
874: $Str .= '<option value="'.$_.'"';
875: if($current eq $_) {
876: $Str .= ' selected';
877: }
878: $Str .= '>'.$reports->{$_}.'</option>'."\n";
879: }
880: $Str .= '</select></td>'."\n";
881: #
882: $Str .= '<td>'.(' 'x30).'</td>';
883: $Str .= '<td align="center">'.
884: '<input type="submit" name="ClearCache" value="Clear Caches" />'.
885: "</td>\n";
886: $Str .= '</tr></tbody></table>'."\n";
887: $Str .= '<hr>'."\n";
888: #
889: return $Str;
890: }
891:
892: ##############################################
893: ##############################################
894: sub handler {
895: my $r=shift;
896: my $c = $r->connection();
897: #
898: # Check for overloading
899: my $loaderror=&Apache::lonnet::overloaderror($r);
900: if ($loaderror) { return $loaderror; }
901: $loaderror=
902: &Apache::lonnet::overloaderror($r,
903: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
904: if ($loaderror) { return $loaderror; }
905: #
906: # Check for access
907: if (! &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
908: $ENV{'user.error.msg'}=
909: $r->uri.":vgr:0:0:Cannot view grades for complete course";
910: if (! &Apache::lonnet::allowed('vgr',
911: $ENV{'request.course.id'}.'/'.$ENV{'request.course.sec'})) {
912: $ENV{'user.error.msg'}=
913: $r->uri.":vgr:0:0:Cannot view grades with given role";
914: return HTTP_NOT_ACCEPTABLE;
915: }
916: }
917: #
918: # Set document type for header only
919: if($r->header_only) {
920: if ($ENV{'browser.mathml'}) {
921: $r->content_type('text/xml');
922: } else {
923: $r->content_type('text/html');
924: }
925: &Apache::loncommon::no_cache($r);
926: $r->send_http_header;
927: return OK;
928: }
929: #
930: # Send the header
931: $r->content_type('text/html');
932: $r->send_http_header;
933: #
934: # Extract form elements from query string
935: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
936: ['sort','reportSelected',
937: 'SelectedStudent']);
938: if (! exists($ENV{'form.reportSelected'})) {
939: $ENV{'form.reportSelected'} = 'student_assessment';
940: }
941: #
942: # Give the LON-CAPA page header
943: $r->print(&Apache::lonhtmlcommon::Title('Course Statistics and Charts'));
944: $r->rflush();
945: #
946: if (! &Apache::lonmysql::verify_sql_connection()) {
947: my $serveradmin = $r->dir_config('lonAdmEMail');
948: $r->print(<<END);
949: <h2><font color="Red">Unable to connect to database!</font></h2>
950: <p>
951: Please notify the server administrator <b>$serveradmin</b>.
952: </p><p>
953: Course Statistics and Charts cannot be retrieved until the database is
954: restarted. Your data is intact but cannot be displayed at this time.
955: </p>
956: </body>
957: </html>
958: END
959: return;
960: }
961: #
962: # Clean out the caches
963: if (exists($ENV{'form.ClearCache'})) {
964: &Apache::loncoursedata::delete_caches($ENV{'requres.course.id'});
965: }
966: #
967: # Set up the statistics and chart environment
968: &PrepareClasslist();
969: &PrepareCourseData($r);
970: #
971: # Begin form output
972: $r->print('<form name="Statistics" ');
973: $r->print('method="post" action="/adm/statistics">');
974: #
975: # Print main menu
976: my %reports = ('classlist' => 'Class list',
977: 'problem_statistics' => 'Problem Statistics',
978: 'student_assessment' => 'Problem Status Chart',
979: # 'percentage' => 'Correct-problems Plot',
980: # 'option_response' => 'Option Response Analysis',
981: # 'activitylog' => 'Activity Log',
982: );
983: $r->print(&CreateMainMenu($ENV{'form.status'},
984: \%reports,$ENV{'form.reportSelected'}));
985: $r->rflush();
986: #
987: my $GoToPage = $ENV{'form.reportSelected'};
988: if($GoToPage eq 'activitylog') {
989: # &Apache::lonproblemstatistics::Activity();
990: } elsif($GoToPage eq 'problem_statistics') {
991: &Apache::lonproblemstatistics::BuildProblemStatisticsPage($r,$c);
992: } elsif($GoToPage eq 'option_response') {
993: # &Apache::lonproblemanalysis::BuildProblemAnalysisPage($r,$c);
994: } elsif($GoToPage eq 'student_assessment') {
995: &Apache::lonstudentassessment::BuildStudentAssessmentPage($r,$c);
996: } elsif($GoToPage eq 'DoDiffGraph' || $GoToPage eq 'PercentWrongGraph') {
997: # &Apache::lonproblemstatistics::BuildGraphicChart($r,$c);
998: } elsif($GoToPage eq 'classlist') {
999: &DisplayClasslist($r);
1000: } elsif($GoToPage eq 'Correct-problems Plot') {
1001: # &Apache::lonpercentage::BuildPercentageGraph($r,$c);
1002: }
1003: #
1004: $r->print("</form>\n");
1005: $r->print("</body>\n</html>\n");
1006: $r->rflush();
1007: #
1008: return OK;
1009: }
1010:
1011: 1;
1012:
1013: #######################################################
1014: #######################################################
1015:
1016: =pod
1017:
1018: =back
1019:
1020: =cut
1021:
1022: #######################################################
1023: #######################################################
1024:
1025: __END__
1026:
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