1: # The LearningOnline Network with CAPA
2: #
3: # $Id: lonstatistics.pm,v 1.78.2.1 2003/10/03 15:34:58 albertel Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: # (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: # Use 3 digits for each the sum and total, which means 7 total...
523: my $num_col = $num_parts+7;
524: if ($num_col < $name_length) {
525: $num_col = $name_length;
526: }
527: $seq->{'base_width'} = $name_length;
528: $seq->{'width'} = $num_col;
529: }
530: return;
531: }
532:
533: #######################################################
534: #######################################################
535:
536: =pod
537:
538: =item &log_sequence($sequence,$recursive,$padding)
539:
540: Write data about the sequence to a logfile. If $recursive is not
541: undef the data is written recursively. $padding is used for recursive
542: calls.
543:
544: =cut
545:
546: #######################################################
547: #######################################################
548: sub log_sequence {
549: my ($seq,$recursive,$padding) = @_;
550: $padding = '' if (! defined($padding));
551: if (ref($seq) ne 'HASH') {
552: &Apache::lonnet::logthis('log_sequence passed bad sequnce');
553: return;
554: }
555: &Apache::lonnet::logthis($padding.'sequence '.$seq->{'title'});
556: while (my($key,$value) = each(%$seq)) {
557: next if ($key eq 'contents');
558: if (ref($value) eq 'ARRAY') {
559: for (my $i=0;$i< scalar(@$value);$i++) {
560: &Apache::lonnet::logthis($padding.$key.'['.$i.']='.
561: $value->[$i]);
562: }
563: } else {
564: &Apache::lonnet::logthis($padding.$key.'='.$value);
565: }
566: }
567: if (defined($recursive)) {
568: &Apache::lonnet::logthis($padding.'-'x20);
569: &Apache::lonnet::logthis($padding.'contains:');
570: foreach my $item (@{$seq->{'contents'}}) {
571: if ($item->{'type'} eq 'container') {
572: &log_sequence($item,$recursive,$padding.' ');
573: } else {
574: &Apache::lonnet::logthis($padding.'title = '.$item->{'title'});
575: while (my($key,$value) = each(%$item)) {
576: next if ($key eq 'title');
577: if (ref($value) eq 'ARRAY') {
578: for (my $i=0;$i< scalar(@$value);$i++) {
579: &Apache::lonnet::logthis($padding.$key.'['.$i.']='.
580: $value->[$i]);
581: }
582: } else {
583: &Apache::lonnet::logthis($padding.$key.'='.$value);
584: }
585: }
586: }
587: }
588: &Apache::lonnet::logthis($padding.'end contents of '.$seq->{'title'});
589: &Apache::lonnet::logthis($padding.'-'x20);
590: }
591: return;
592: }
593:
594: ##############################################
595: ##############################################
596:
597: =pod
598:
599: =item &StudentDataSelect($elementname,$status,$numvisible,$selected)
600:
601: Returns html for a selection box allowing the user to choose one (or more)
602: of the fields of student data available (fullname, username, id, section, etc)
603:
604: =over 4
605:
606: =item $elementname The name of the HTML form element
607:
608: =item $status 'multiple' or 'single' selection box
609:
610: =item $numvisible The number of options to be visible
611:
612: =back
613:
614: =cut
615:
616: ##############################################
617: ##############################################
618: sub StudentDataSelect {
619: my ($elementname,$status,$numvisible)=@_;
620: if ($numvisible < 1) {
621: return;
622: }
623: #
624: # Build the form element
625: my $Str = "\n";
626: $Str .= '<select name="'.$elementname.'" ';
627: if ($status ne 'single') {
628: $Str .= 'multiple="true" ';
629: }
630: $Str .= 'size="'.$numvisible.'" >'."\n";
631: #
632: # Deal with 'all'
633: $Str .= ' <option value="all" ';
634: foreach (@SelectedStudentData) {
635: if ($_ eq 'all') {
636: $Str .= 'selected ';
637: last;
638: }
639: }
640: $Str .= ">all</option>\n";
641: #
642: # Loop through the student data fields
643: foreach my $item (@StudentDataOrder) {
644: $Str .= ' <option value="'.$item.'" ';
645: foreach (@SelectedStudentData) {
646: if ($item eq $_ ) {
647: $Str .= 'selected ';
648: last;
649: }
650: }
651: $Str .= '>'.$item."</option>\n";
652: }
653: $Str .= "</select>\n";
654: return $Str;
655: }
656:
657: ##############################################
658: ##############################################
659:
660: =pod
661:
662: =item &MapSelect($elementname,$status,$numvisible,$restriction)
663:
664: Returns html for a selection box allowing the user to choose one (or more)
665: of the sequences in the course. The values of the sequences are the symbs.
666: If the top sequence is selected, the value 'top' will result.
667:
668: =over 4
669:
670: =item $elementname The name of the HTML form element
671:
672: =item $status 'multiple' or 'single' selection box
673:
674: =item $numvisible The number of options to be visible
675:
676: =item $restriction Code reference to subroutine which returns true or
677: false. The code must expect a reference to a sequence data structure.
678:
679: =back
680:
681: =cut
682:
683: ##############################################
684: ##############################################
685: sub MapSelect {
686: my ($elementname,$status,$numvisible,$restriction)=@_;
687: if ($numvisible < 1) {
688: return;
689: }
690: #
691: # Set up array of selected items
692: &SetSelectedMaps($elementname);
693: #
694: # Set up the restriction call
695: if (! defined($restriction)) {
696: $restriction = sub { 1; };
697: }
698: #
699: # Build the form element
700: my $Str = "\n";
701: $Str .= '<select name="'.$elementname.'" ';
702: if ($status ne 'single') {
703: $Str .= 'multiple="true" ';
704: }
705: $Str .= 'size="'.$numvisible.'" >'."\n";
706: #
707: # Deal with 'all'
708: foreach (@SelectedMaps) {
709: if ($_ eq 'all') {
710: @SelectedMaps = ('all');
711: last;
712: }
713: }
714: #
715: # Put in option for 'all'
716: $Str .= ' <option value="all" ';
717: foreach (@SelectedMaps) {
718: if ($_ eq 'all') {
719: $Str .= 'selected ';
720: last;
721: }
722: }
723: $Str .= ">all</option>\n";
724: #
725: # Loop through the sequences
726: foreach my $seq (@Sequences) {
727: next if (! $restriction->($seq));
728: $Str .= ' <option value="'.$seq->{'symb'}.'" ';
729: foreach (@SelectedMaps) {
730: if ($seq->{'symb'} eq $_) {
731: $Str .= 'selected ';
732: last;
733: }
734: }
735: $Str .= '>'.$seq->{'title'}."</option>\n";
736: }
737: $Str .= "</select>\n";
738: return $Str;
739: }
740:
741: ##############################################
742: ##############################################
743:
744: =pod
745:
746: =item &SectionSelect($elementname,$status,$numvisible)
747:
748: Returns html for a selection box allowing the user to choose one (or more)
749: of the sections in the course.
750:
751: Uses the package variables @Sections and @SelectedSections
752: =over 4
753:
754: =item $elementname The name of the HTML form element
755:
756: =item $status 'multiple' or 'single' selection box
757:
758: =item $numvisible The number of options to be visible
759:
760: =back
761:
762: =cut
763:
764: ##############################################
765: ##############################################
766: sub SectionSelect {
767: my ($elementname,$status,$numvisible)=@_;
768: if ($numvisible < 1) {
769: return;
770: }
771: #
772: # Make sure we have the data we need to continue
773: if (! @Sections) {
774: &PrepareClasslist()
775: }
776: #
777: # Build the form element
778: my $Str = "\n";
779: $Str .= '<select name="'.$elementname.'" ';
780: if ($status ne 'single') {
781: $Str .= 'multiple="true" ';
782: }
783: $Str .= 'size="'.$numvisible.'" >'."\n";
784: #
785: # Loop through the sequences
786: foreach my $s (@Sections) {
787: $Str .= ' <option value="'.$s.'" ';
788: foreach (@SelectedSections) {
789: if ($s eq $_) {
790: $Str .= 'selected ';
791: last;
792: }
793: }
794: $Str .= '>'.$s."</option>\n";
795: }
796: $Str .= "</select>\n";
797: return $Str;
798: }
799:
800: ##################################################
801: ##################################################
802: sub DisplayClasslist {
803: my ($r)=@_;
804: #
805: my @Fields = ('fullname','username','domain','id','section');
806: #
807: my $Str='';
808: if (! @Students) {
809: if ($SelectedSections[0] eq 'all') {
810: if (lc($ENV{'form.Status'}) eq 'any') {
811: $Str .= '<h2>There are no students in the course.</h2>';
812: } elsif (lc($ENV{'form.Status'}) eq 'active') {
813: $Str .= '<h2>There are no currently enrolled students in '.
814: 'the course.</h2>';
815: } elsif (lc($ENV{'form.Status'}) eq 'expired') {
816: $Str .= '<h2>There are no previously enrolled '.
817: 'students in the course.</h2>';
818: }
819: } else {
820: my $sections;
821: if (@SelectedSections == 1) {
822: $sections = 'section '.$SelectedSections[0];
823: } elsif (@SelectedSections > 2) {
824: $sections = 'sections '.join(', ',@SelectedSections);
825: $sections =~ s/, ([^,])*$/, and $1/;
826: } else {
827: $sections = 'sections '.join(' and ',@SelectedSections);
828: }
829: if (lc($ENV{'form.Status'}) eq 'any') {
830: $Str .= '<h2>There are no students in '.$sections.'.</h2>';
831: } elsif (lc($ENV{'form.Status'}) eq 'active') {
832: $Str .= '<h2>There are no currently enrolled students '.
833: 'in '.$sections.'.</h2>';
834: } elsif (lc($ENV{'form.Status'}) eq 'expired') {
835: $Str .= '<h2>There are no previously enrolled students '.
836: 'in '.$sections.'.</h2>';
837: }
838: }
839: $Str.= '<a href="/adm/statistics?reportSelected=student_assessment">'.
840: 'Return to the chart.</a>';
841: $r->print($Str);
842: $r->rflush();
843: return;
844: }
845:
846: # "Click" is asinine but it is probably not my place to change the world.
847: $Str .= '<h2>Click on a students name or username to view their chart</h2>';
848: $Str .= '<table border="0"><tr><td bgcolor="#777777">'."\n";
849: $Str .= '<table border="0" cellpadding="3"><tr bgcolor="#e6ffff">'."\n";
850: foreach my $field (@Fields) {
851: $Str .= '<th><a href="/adm/statistics?reportSelected=classlist&sort='.$field.'">'.$field.
852: '</a></th>';
853: }
854: $Str .= '</tr>'."\n";
855: #
856: my $alternate = 0;
857: foreach my $student (@Students) { # @Students is a package variable
858: my $sname = $student->{'username'}.':'.$student->{'domain'};
859: if($alternate) {
860: $Str .= '<tr bgcolor="#ffffe6">';
861: } else {
862: $Str .= '<tr bgcolor="#ffffc6">';
863: }
864: $alternate = ($alternate + 1) % 2;
865: #
866: foreach my $field (@Fields) {
867: $Str .= '<td>';
868: if ($field eq 'fullname' || $field eq 'username') {
869: $Str .= '<a href="/adm/statistics?reportSelected=';
870: $Str .= &Apache::lonnet::escape('student_assessment');
871: $Str .= '&sort='.&Apache::lonnet::escape($ENV{'form.sort'});
872: $Str .= '&SelectedStudent=';
873: $Str .= &Apache::lonnet::escape($sname).'">';
874: $Str .= $student->{$field}.' ';
875: $Str .= '</a>';
876: } else {
877: $Str .= $student->{$field};
878: }
879: $Str .= '</td>';
880: }
881: $Str .= "</tr>\n";
882: }
883: $Str .= '</table></td></tr></table>'."\n";
884: #
885: $r->print($Str);
886: $r->rflush();
887: #
888: return;
889: }
890:
891: ##############################################
892: ##############################################
893: sub CreateMainMenu {
894: my ($status,$reports,$current)=@_;
895: #
896: my $Str = '';
897: #
898: $Str = '<input type="hidden" name="reportSelected" value="'.$current.'">';
899: # $Str .= '<table border="0"><tbody><tr>'."\n";
900: # $Str .= '<td align="center"><b>Report:</b></td>'."\n";
901: # $Str .= '<td align="center">';
902: # $Str .= '<select name="reportSelected" '.
903: # 'onchange="document.Statistics.submit()">'."\n";
904: # foreach (sort(keys(%$reports))) {
905: # $Str .= '<option value="'.$_.'"';
906: # if($current eq $_) {
907: # $Str .= ' selected';
908: # }
909: # $Str .= '>'.$reports->{$_}.'</option>'."\n";
910: # }
911: # $Str .= '</select></td>'."\n";
912: # #
913: # $Str .= '<td>'.(' 'x30).'</td>';
914: # $Str .= '<td align="center">'.
915: # '<input type="submit" name="ClearCache" value="Clear Caches" />'.
916: # "</td>\n";
917: # $Str .= '</tr></tbody></table>'."\n";
918: # $Str .= '<hr>'."\n";
919: #
920: return $Str;
921: }
922:
923: ##############################################
924: ##############################################
925: sub handler {
926: my $r=shift;
927: my $c = $r->connection();
928: #
929: &Apache::loncoursedata::clear_internal_caches();
930: #
931: # Check for overloading
932: my $loaderror=&Apache::lonnet::overloaderror($r);
933: if ($loaderror) { return $loaderror; }
934: $loaderror=
935: &Apache::lonnet::overloaderror($r,
936: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
937: if ($loaderror) { return $loaderror; }
938: #
939: # Check for access
940: if (! &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
941: $ENV{'user.error.msg'}=
942: $r->uri.":vgr:0:0:Cannot view grades for complete course";
943: if (! &Apache::lonnet::allowed('vgr',
944: $ENV{'request.course.id'}.'/'.$ENV{'request.course.sec'})) {
945: $ENV{'user.error.msg'}=
946: $r->uri.":vgr:0:0:Cannot view grades with given role";
947: return HTTP_NOT_ACCEPTABLE;
948: }
949: }
950: #
951: # Set document type for header only
952: if($r->header_only) {
953: if ($ENV{'browser.mathml'}) {
954: $r->content_type('text/xml');
955: } else {
956: $r->content_type('text/html');
957: }
958: &Apache::loncommon::no_cache($r);
959: $r->send_http_header;
960: return OK;
961: }
962: #
963: # Send the header
964: $r->content_type('text/html');
965: $r->send_http_header;
966: #
967: # Extract form elements from query string
968: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
969: ['sort','reportSelected',
970: 'SelectedStudent']);
971: if (! exists($ENV{'form.reportSelected'})) {
972: $ENV{'form.reportSelected'} = 'student_assessment';
973: }
974: #
975: # Give the LON-CAPA page header
976: $r->print(&Apache::lonhtmlcommon::Title('Course Statistics and Charts'));
977: $r->rflush();
978: #
979: if (! &Apache::lonmysql::verify_sql_connection()) {
980: my $serveradmin = $r->dir_config('lonAdmEMail');
981: $r->print(<<END);
982: <h2><font color="Red">Unable to connect to database!</font></h2>
983: <p>
984: Please notify the server administrator <b>$serveradmin</b>.
985: </p><p>
986: Course Statistics and Charts cannot be retrieved until the database is
987: restarted. Your data is intact but cannot be displayed at this time.
988: </p>
989: </body>
990: </html>
991: END
992: return;
993: }
994: #
995: # Clean out the caches
996: if (exists($ENV{'form.ClearCache'})) {
997: &Apache::loncoursedata::delete_caches($ENV{'requres.course.id'});
998: }
999: #
1000: # Set up the statistics and chart environment
1001: &PrepareClasslist();
1002: &PrepareCourseData($r);
1003: #
1004: # Begin form output
1005: $r->print('<form name="Statistics" ');
1006: $r->print('method="post" action="/adm/statistics">');
1007: #
1008: # Print main menu
1009: my %reports = ('classlist' => 'Class list',
1010: 'problem_statistics' => 'Problem Statistics',
1011: 'student_assessment' => 'Problem Status Chart',
1012: # 'percentage' => 'Correct-problems Plot',
1013: # 'option_response' => 'Option Response Analysis',
1014: # 'activitylog' => 'Activity Log',
1015: );
1016: $r->print(&CreateMainMenu($ENV{'form.status'},
1017: \%reports,$ENV{'form.reportSelected'}));
1018: $r->rflush();
1019: #
1020: my $GoToPage = $ENV{'form.reportSelected'};
1021: if($GoToPage eq 'activitylog') {
1022: # &Apache::lonproblemstatistics::Activity();
1023: } elsif($GoToPage eq 'problem_statistics') {
1024: &Apache::lonproblemstatistics::BuildProblemStatisticsPage($r,$c);
1025: } elsif($GoToPage eq 'option_response') {
1026: # &Apache::lonproblemanalysis::BuildProblemAnalysisPage($r,$c);
1027: } elsif($GoToPage eq 'student_assessment') {
1028: &Apache::lonstudentassessment::BuildStudentAssessmentPage($r,$c);
1029: } elsif($GoToPage eq 'DoDiffGraph' || $GoToPage eq 'PercentWrongGraph') {
1030: # &Apache::lonproblemstatistics::BuildGraphicChart($r,$c);
1031: } elsif($GoToPage eq 'Correct-problems Plot') {
1032: # &Apache::lonpercentage::BuildPercentageGraph($r,$c);
1033: }
1034: #
1035: $r->print("</form>\n");
1036: $r->print("</body>\n</html>\n");
1037: $r->rflush();
1038: #
1039: return OK;
1040: }
1041:
1042: 1;
1043:
1044: #######################################################
1045: #######################################################
1046:
1047: =pod
1048:
1049: =back
1050:
1051: =cut
1052:
1053: #######################################################
1054: #######################################################
1055:
1056: __END__
1057:
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