1: # The LearningOnline Network with CAPA
2: # (Publication Handler
3: #
4: # $Id: lonstatistics.pm,v 1.7 2002/03/06 18:42:01 minaeibi Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # (Navigate problems for statistical reports
29: # YEAR=2001
30: # 5/05,7/09,7/25/01,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei
31: # 11/1, 11/4, 11/16, 12/14, 12/16, 12/18,12/20,12/31 Behrouz Minaei
32: # YEAR=2002
33: # 1/22, 2/1, 2/6, 2/25, 3/2, 3/6 Behrouz Minaei
34: ###
35:
36: package Apache::lonstatistics;
37:
38: use strict;
39: use Apache::Constants qw(:common :http);
40: use Apache::lonnet();
41: use Apache::lonhomework;
42: use HTML::TokeParser;
43: use GDBM_File;
44:
45: # -------------------------------------------------------------- Module Globals
46: my %hash;
47: my %CachData;
48: my %GraphDat;
49: my %maps;
50: my %mapsort;
51: my %section;
52: my %StuBox;
53: my %DiscFac;
54: my %DisUp;
55: my %DisLow;
56: my $UpCnt;
57: my $CurMap;
58: my $CurSec;
59: my $CurStu;
60: my @cols;
61: my @list;
62: my @students;
63: my $p_count;
64: my $Pos;
65: my $r;
66: my $OpSel1;
67: my $OpSel2;
68: my $OpSelDis1;
69: my $OpSelDis2;
70: my $CurDis=0;
71: my $OpSel3;
72: my $OpSel4;
73: my $GData;
74: my $cid;
75: my $firstres;
76: my $lastres;
77: my $DiscFlag;
78: my $HWN;
79: my $P_Order;
80: my %Header = (0,"Homework Sets Order",1,"#Stdnts",2,"Tries",3,"Mod",
81: 4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff",
82: 9,"S.D.",10,"Skew.",
83: 11,"D.F.",12,"U.A.",13,"L.A.",14,"U.R.",15,"L.R.");
84:
85: #------- Processing upperlist and lowerlist according to each problem
86: sub ProcessDisc {
87: my @List = @_;
88: @List = sort (@List);
89: my $Count = $#List+1;
90: my $Prb;
91: my @Dis;
92: my $Slvd=0;
93: my $tmp;
94: my $Sum=0;
95: my $nIdx=0;
96: my $nStud=0;
97: my %Proc;
98: undef %Proc;
99: while ($nIdx<$Count) {
100: ($Prb,$tmp)=split(/\=/,$List[$nIdx]);
101: @Dis=split(/\+/,$tmp);
102: my $Temp = $Prb;
103: do {
104: $nIdx++;
105: $nStud++;
106: $Sum += $Dis[$CurDis];
107: ($Prb,$tmp)=split(/\=/,$List[$nIdx]);
108: @Dis=split(/\+/,$tmp);
109: } while ( $Prb eq $Temp && $nIdx < $Count );
110: $Proc{$Temp}=$Sum.':'.$nStud;
111: $Proc{$Temp}=($Sum/$nStud).':'.$nStud;
112: # $r->print("$nIdx) $Temp --> ($nStud) $Proc{$Temp} <br>");
113: $Sum=0;
114: $nStud=0;
115: }
116: return %Proc;
117: }
118:
119:
120: #------- Creating Discimination factor
121: sub Discriminant {
122: my $Count=0;
123: foreach (keys(%DiscFac)){
124: $Count++;
125: }
126: $UpCnt = int(0.27*$Count);
127: my $low=0;
128: my $up=$Count-$UpCnt;
129: my @UpList=();
130: my @LowList=();
131: $Count=0;
132: foreach my $key (sort(keys(%DiscFac))){
133: $Count++;
134: #$r->print("<br>$Count) $key = $DiscFac{$key}");
135: if ($low < $UpCnt || $Count > $up) {
136: $low++;
137: my $str=$DiscFac{$key};
138: foreach(split(/\:/,$str)){
139: if ($_) {
140: if ($low<$UpCnt){push(@LowList,$_);}
141: else {push(@UpList,$_);}
142: }
143: }
144: }
145: }
146: %DisUp=&ProcessDisc(@UpList);
147: %DisLow=&ProcessDisc(@LowList);
148: }
149:
150:
151: sub NumericSort {
152: $a <=> $b;
153: }
154:
155: # ------ Create different Student Report
156: sub StudentReport {
157:
158: my ($sname,$sdom)=@_;
159:
160: if ( $sname eq 'All Students' ) {
161: $r->print( '<h3><font color=blue>WARNING:
162: Please select a student</font></h3>' );
163: return;
164: }
165: my $shome=&Apache::lonnet::homeserver($sname,$sdom);
166: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );
167: my %result = ();
168: my $ResId;
169: my $PrOrd;
170: my $Code;
171: my $Tries;
172: my $TotalTries = 0;
173: my $ParCr = 0;
174: my $Wrongs;
175: my %TempHash;
176: my $Version;
177: my $LatestVersion;
178: my $PtrTry='';
179: my $PtrCod='';
180: my $SetNo=0;
181: my $Str = "\n".'<table border=2>'.
182: "\n".'<tr>'.
183: "\n".'<th> # </th>'.
184: "\n".'<th> Set Title </th>'.
185: "\n".'<th> Results </th>'.
186: "\n".'<th> Tries </th>'.
187: "\n".'</tr>';
188: unless ($reply=~/^error\:/) {
189: foreach (split(/\&/,$reply)){
190: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
191: $result{$name}=$value;
192: }
193: foreach my $CurCol (@cols) {
194: if (!$CurCol){
195: my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});
196: if ( $Set ) {
197: $SetNo++;
198: $Str .= "\n"."<tr>".
199: "\n"."<td> $SetNo </td>".
200: "\n"."<td> $Set </td>".
201: "\n"."<td> $PtrCod </td>".
202: "\n"."<td> $PtrTry</td>".
203: "\n"."</tr>";
204: }
205: $PtrTry='';
206: $PtrCod='';
207: next;
208: }
209: ($PrOrd,$ResId)=split(/\:/,$CurCol);
210: $ResId=~/(\d+)\.(\d+)/;
211: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
212: if ( $CurMap ne 'All Maps' ) {
213: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
214: if ( $Map ne $ResMap ) { next; }
215: }
216: my $meta=$hash{'src_'.$ResId};
217: my $PartNo = 0;
218: undef %TempHash;
219: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))){
220: if ($_=~/^stores\_(\d+)\_tries$/) {
221: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
222: if ( $TempHash{"$Part"} eq '' ) {
223: $TempHash{"$Part"} = $Part;
224: $TempHash{$PartNo}=$Part;
225: $TempHash{"$Part.Code"} = '-';
226: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
227: $PartNo++;
228: }
229: }
230: }
231:
232: my $Prob = $Map.'___'.$2.'___'.
233: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
234: $Code='U';
235: $Tries = 0;
236: $Wrongs = 0;
237: $LatestVersion = $result{"version:$Prob"};
238: if ( $LatestVersion ) {
239: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
240: my $vkeys = $result{"$Version:keys:$Prob"};
241: my @keys = split(/\:/,$vkeys);
242:
243: foreach my $Key (@keys) {
244: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
245: my $Part = $1;
246: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
247: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
248: $TotalTries += $Tries;
249: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
250: if ( $Val eq 'correct_by_student' )
251: { $Wrongs = $Tries - 1; $Code = 'Y'; }
252: elsif ( $Val eq 'correct_by_override' )
253: { $Wrongs = $Tries - 1; $Code = 'y'; }
254: elsif ( $Val eq 'incorrect_attempted' ||
255: $Val eq 'incorrect_by_override' )
256: { $Wrongs = $Tries; $Code = 'N'; }
257: $TempHash{"$Part.Code"} = $Code;
258: $TempHash{"$Part.Wrongs"} = $Wrongs;
259: }
260: }
261: }
262: for ( my $n = 0; $n < $PartNo; $n++ ) {
263: my $part = $TempHash{$n};
264: if ($PtrTry ne '') {$PtrTry .= ',';}
265: $PtrTry .= "$TempHash{$part.'.Tries'}";
266: $PtrCod .= "$TempHash{$part.'.Code'}";
267: }
268: }
269: else {
270: for(my $n=0; $n<$PartNo; $n++) {
271: if ($PtrTry ne '') {$PtrTry .= ',';}
272: $PtrTry .= "0";
273: $PtrCod .= "-";
274: }
275: }
276: }
277: }
278: $Str .= "\n".'</table>';
279: $r->print($Str);
280: $r->rflush();
281: }
282:
283: sub CreateTable {
284: my $ColNo=0;
285: foreach (keys(%Header)){
286: $ColNo++;
287: }
288: my ($Hd, $Hid)=@_;
289: if ( $Hd == 1 ) {
290: $r->print('<br><a href="'.$hash{'src_'.$Hid}.
291: '" target="_blank">'.$hash{'title_'.$Hid}.'</a>');
292: }
293: my $Result = "\n".'<table border=2>';
294: $Result .= '<tr><th>P#</th>'."\n";
295: for ( my $nIdx=0; $nIdx < $ColNo; $nIdx++ ) {
296: $Result .= '<th>'.'<input type="submit" name="sort" value="'.
297: $Header{$nIdx}.'" />'.'</th>'."\n";
298: }
299: $Result .= "\n".'</tr>'."\n";
300: $r->print( $Result );
301: $r->rflush();
302: }
303:
304: sub CloseTable {
305: $r->print("\n".'</table>'."\n");
306: $r->rflush();
307: }
308:
309: # ------------------------------------------- Prepare Statistics Table
310: sub PreStatTable {
311: my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
312: "_$ENV{'user.domain'}_$cid\_statistics.db";
313: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
314: "_$ENV{'user.domain'}_$cid\_graph.db";
315: my $CachDisFac = "/home/httpd/perl/tmp/$ENV{'user.name'}".
316: "_$ENV{'user.domain'}_$cid\_DiscFactor.db";
317: my $OpSel11='';
318: my $OpSel12='';
319: my $OpSel13='';
320: my $Status = $ENV{'form.status'};
321: if ( $Status eq 'Any' ) { $OpSel13='selected'; }
322: elsif ($Status eq 'Expired' ) { $OpSel12 = 'selected'; }
323: else { $OpSel11 = 'selected'; }
324:
325: my $Ptr = '';
326: $Ptr .= '<br><b> Student Status: </b>'."\n".
327: '<select name="status">'.
328: '<option '.$OpSel11.' >Active</option>'."\n".
329: '<option '.$OpSel12.' >Expired</option>'."\n".
330: '<option '.$OpSel13.' >Any</option> </select> '."\n";
331: $Ptr .= ' ';
332: $Ptr .= '<input type=submit name=sort value="Recalculate Statistics"/>'."\n";
333:
334: $Ptr .= '<br><b> Sorting Type: </b>'."\n".
335: '<select name="order"> <option '.$OpSel1.' >Ascending</option>'."\n".
336: '<option '.$OpSel2.'>Descending</option> </select> '."\n";
337: $Ptr .= ' ';
338: $Ptr .= '<input type="submit" name="sort" value="DoDiff Graph" />'."\n";
339: $Ptr .= ' ';
340: $Ptr .= '<input type="submit" name="sort" value="%Wrong Graph" />'."\n";
341:
342: $Ptr .= '<pre>'.
343: '<b> #Stdnts</b>: Total Number of Students opened the problem.<br>'.
344: '<b> Tries </b>: Total Number of Tries for solving the problem.<br>'.
345: '<b> Mod </b> : Maximunm Number of Tries for solving the problem.<br>'.
346: '<b> Mean </b>: Average Number of the tries. [ Tries / #Stdnts ]<br>'.
347: '<b> #YES </b>: Number of students solved the problem correctly.<br>'.
348: '<b> #yes </b>: Number of students solved the problem by override.<br>'.
349: '<b> %Wrng </b>: Percentage of students tried to solve the problem but'.
350: ' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
351: # ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'.
352: '<b> DoDiff </b>: Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'.
353: '<b> S.D. </b> : Standard Deviation of the tries.'.
354: '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
355: ' where Xi denotes every student\'s tries ]<br>'.
356: '<b> Skew. </b>: Skewness of the students tries.'.
357: ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
358:
359: '<b> Dis.F. </b>: Discrimination Factor. [ Sum of Partial Credits'.
360: ' Awarded / Total Number of Tries in %27 upper and lower students]<br>'.
361: '<b> U.A. </b>: Upper %27 Award<br>'.
362: '<b> L.A. </b>: Lower %27 Award<br>'.
363: '<b> U.R. </b>: Upper %27 Records<br>'.
364: '<b> L.R. </b>: Lower %27 Records'.
365:
366: # "<br>The <b>Upper 27%</b> has <b>$UpCnt</b> records.".
367: # " The <b>Lower 27%</b> has <b>$UpCnt</b> records <br>".
368: # "The Criterion of sorting the students: ".
369: # "<b>( Sum of Partial Credits Awarded / ".
370: # "Total Number of Tries )</b>".
371:
372: '</pre>';
373:
374: $r->print($Ptr);
375: $r->rflush();
376:
377: if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {
378: if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {
379: tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_READER,0640);
380: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
381: &Cache_Statistics();
382: }
383: else {
384: $r->print("Unable to tie hash to db file");
385: }
386: }
387: else {
388: if (tie(%CachData,'GDBM_File',$CacheDB,&GDBM_WRCREAT,0640)) {
389: tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_WRCREAT,0640);
390: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
391: foreach (keys %DiscFac) {delete $CachData{$_};}
392: foreach (keys %CachData) {delete $CachData{$_};}
393: $DiscFlag=0;
394: &Build_Statistics();
395: }
396: else {
397: $r->print("Unable to tie hash to db file");
398: }
399: }
400: #$r->print('Total instances of the problems : '.($p_count*($#students+1)));
401:
402: untie(%CachData);
403: untie(%GraphDat);
404: untie(%DiscFac);
405: }
406:
407:
408: # ------------------------------------- Find the section of student in a course
409:
410: sub usection {
411: my ($udom,$unam,$courseid,$ActiveFlag)=@_;
412: $courseid=~s/\_/\//g;
413: $courseid=~s/^(\w)/\/$1/;
414: foreach (split(/\&/,&Apache::lonnet::reply('dump:'.
415: $udom.':'.$unam.':roles',
416: &Apache::lonnet::homeserver($unam,$udom)))){
417: my ($key,$value)=split(/\=/,$_);
418: $key=&Apache::lonnet::unescape($key);
419: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
420: my $section=$1;
421: if ($key eq $courseid.'_st') { $section=''; }
422: my ($dummy,$end,$start)=split(/\_/,&Apache::lonnet::unescape($value));
423: if ( $ActiveFlag ne 'Any' ) {
424: my $now=time;
425: my $notactive=0;
426: if ($start) {
427: if ($now<$start) { $notactive=1; }
428: }
429: if ($end) {
430: if ($now>$end) { $notactive=1; }
431: }
432: if ((($ActiveFlag eq 'Expired') && $notactive == 1) ||
433: (($ActiveFlag eq 'Active') && $notactive == 0 ) ) {
434: return $section;
435: }
436: else { return '-1'; }
437: }
438: return $section;
439: }
440: }
441: return '-1';
442: }
443:
444:
445: # ------ Dump the Student's DB file and handling the data for statistics table
446:
447: sub ExtractStudentData {
448: my ($student,$coid)=@_;
449: my ($sname,$sdom) = split( /\:/, $student );
450: my $shome=&Apache::lonnet::homeserver( $sname,$sdom );
451: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );
452: my %result = ();
453: my $ResId;
454: my $PrOrd;
455: my $Dis = '';
456: my $Code;
457: my $Tries;
458: my $ParCr;
459: my $TotalTries = 0;
460: my $TotalOpend = 0;
461: my $ProbSolved = 0;
462: my $ProbTot = 0;
463: my $TimeTot = 0;
464: my $TotParCr = 0;
465: my $Wrongs;
466: my %TempHash;
467: my $Version;
468: my $LatestVersion;
469: my $SecLimit;
470: my $MapLimit;
471: unless ($reply=~/^error\:/) {
472: foreach (split(/\&/,$reply)) {
473: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
474: $result{$name}=$value;
475: }
476: foreach my $CurCol(@cols) {
477: ($PrOrd,$ResId)=split(/\:/,$CurCol);
478: if ( !$CurCol ) { next; }
479: $ResId=~/(\d+)\.(\d+)/;
480: my $MapId=$1;
481: my $PrbId=$2;
482: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$MapId} );
483: if ( $CurMap ne 'All Maps' ) {
484: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
485: if ( $Map ne $ResMap ) { next; }
486: }
487: my $meta=$hash{'src_'.$ResId};
488: my $PartNo = 0;
489: $Dis .= ':';
490: undef %TempHash;
491: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
492: if ($_=~/^stores\_(\d+)\_tries$/) {
493: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
494: if ( $TempHash{"$Part"} eq '' ) {
495: $TempHash{"$Part"} = $Part;
496: $TempHash{$PartNo}=$Part;
497: $TempHash{"$Part.Code"} = 'U';
498: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
499: $PartNo++;
500: }
501: }
502: }
503:
504: my $Prob = $Map.'___'.$PrbId.'___'.
505: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
506: $Code='U';
507: $Tries = 0;
508: $ParCr = 0;
509: $Wrongs = 0;
510: $LatestVersion = $result{"version:$Prob"};
511:
512: if ( $LatestVersion ) {
513: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
514: my $vkeys = $result{"$Version:keys:$Prob"};
515: my @keys = split(/\:/,$vkeys);
516:
517: foreach my $Key (@keys) {
518: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
519: my $Part = $1;
520: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
521: $ParCr = $result{"$Version:$Prob:resource.$Part.awarded"};
522: my $Time = $result{"$Version:$Prob:timestamp"};
523: $TempHash{"$Part.Time"} = ($Time) ? $Time : 0;
524: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
525: $TempHash{"$Part.ParCr"} = ($ParCr) ? $ParCr : 0;
526: $TotalTries += $TempHash{"$Part.Tries"};
527: $TotParCr += $TempHash{"$Part.ParCr"};
528: #$r->print($Version.'---'.$Prob.'==='.$Time.'<br>');
529: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
530: if ( $Val eq 'correct_by_student' )
531: { $Wrongs = $Tries - 1; $Code = 'C'; }
532: elsif ( $Val eq 'correct_by_override' )
533: { $Wrongs = $Tries - 1; $Code = 'O'; }
534: elsif ( $Val eq 'incorrect_attempted' ||
535: $Val eq 'incorrect_by_override' )
536: { $Wrongs = $Tries; $Code = 'I'; }
537: $TempHash{"$Part.Code"} = $Code;
538: $TempHash{"$Part.Wrongs"} = $Wrongs;
539: }
540: }
541: }
542: for ( my $n = 0; $n < $PartNo; $n++ ) {
543: my $part = $TempHash{$n};
544: my $Yes = 0;
545: if ( $TempHash{$part.'.Code'} eq 'C' ||
546: $TempHash{$part.'.Code'} eq 'O' )
547: {$ProbSolved++;$Yes=1;}
548:
549: # my $ptr = "$hash{'title_'.$ResId}";
550: my $ptr = $TempHash{$part.'.PrOrd'}.':'.$ResId;
551:
552: if ( $PartNo > 1 ) {
553: $ptr .= "*(part $part)";
554: $Dis .= ':';
555: }
556: my $Fac = ($TempHash{"$part.Tries"}) ?
557: ($TempHash{"$part.ParCr"}/$TempHash{"$part.Tries"}) : 0;
558: my $DisF;
559: if ( $Fac > 0 && $Fac < 1 ) {
560: $DisF = sprintf( "%.4f", $Fac );
561: }
562: else {$DisF = $Fac;}
563: # $DisF .= '+'.$TempHash{"$part.Time"};
564: $TimeTot += $TempHash{"$part.Time"};
565: $Dis .= $TempHash{$part.'.PrOrd'}.'='.$DisF.'+'.$Yes;
566:
567: #$r->print('<br>'.$DisFactor,'###',$DiscFac{$DisFactor});
568: $ptr .= ":$TempHash{$part.'.Tries'}".
569: ":$TempHash{$part.'.Wrongs'}".
570: ":$TempHash{$part.'.Code'}";
571: push (@list, $ptr);
572: $TotalOpend++;
573: $ProbTot++;
574: }
575: }
576: #else {
577: #for(my $n=0; $n<$PartNo; $n++) {
578: # push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U");
579: # $ProbTot++;
580: #}
581: #}
582: }
583: if ( $TotalTries ) {
584: my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;
585: my $DisFactor = sprintf( "%.4f", $DisFac );
586: $DiscFac{$DisFactor}=$Dis;
587: #$r->print('<br>'.$DisFactor,'###',$DiscFac{$DisFactor});
588: #my $time;
589: #if ($ProbSolved){
590: #$time = int(($TimeTot/$ProbSolved)-10000000);
591: #}
592: #$DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.
593: # $TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;
594: }
595: }
596: #$r->print($sname.' PrCr= '.$TotParCr.' Slvd= '.$ProbSolved.' Tries='.$TotalTries.'<br>');
597: }
598:
599:
600: # ------------------------------------------------------------ Build page table
601: sub tracetable {
602: my ($rid,$beenhere)=@_;
603: $rid=~/(\d+)\.(\d+)/;
604: $maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};
605: #$maps{$HWN}=$hash{'title_'.$rid};
606: unless ($beenhere=~/\&$rid\&/) {
607: $beenhere.=$rid.'&';
608: if (defined($hash{'is_map_'.$rid})) {
609: my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};
610: if ( $cmap eq 'sequence' || $cmap eq 'page' ) {
611: $cols[$#cols+1]=0;
612: $P_Order++;
613: $HWN=$P_Order;
614: $mapsort{$HWN} = $rid.':';
615: #$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=
616: # $hash{'title_'.$rid};
617: }
618: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
619: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
620: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
621:
622: &tracetable($hash{'map_start_'.$hash{'src_'.$rid}},
623: '&'.$frid.'&');
624:
625: $cols[$#cols+1]=($P_Order+1).':'.$frid;
626:
627: my $meta=$hash{'src_'.$frid};
628: my $PartNo = 0;
629: if ($meta) {
630: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
631: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
632: if ($_=~/^stores\_(\d+)\_tries$/) {
633: &Apache::lonnet::metadata($meta,$_.'.part');
634: $P_Order++;
635: $mapsort{$HWN} .= '&'.$P_Order;
636: $PartNo++;
637: $r->print('<br>'.$PartNo.'---'.$P_Order);
638: }
639: }
640: }
641: }
642: }
643: } else {
644: $cols[$#cols+1]=($P_Order+1).':'.$rid;
645: my $meta=$hash{'src_'.$rid};
646: my $PartNo = 0;
647: if ($meta) {
648: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
649: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
650: if ($_=~/^stores\_(\d+)\_tries$/) {
651: &Apache::lonnet::metadata($meta,$_.'.part');
652: $P_Order++;
653: $mapsort{$HWN} .= '&'.$P_Order;
654: $PartNo++;
655: }
656: }
657: }
658: }
659: }
660: if (defined($hash{'to_'.$rid})) {
661: foreach (split(/\,/,$hash{'to_'.$rid})){
662: &tracetable($hash{'goesto_'.$_},$beenhere);
663: }
664: }
665: }
666: }
667:
668: sub MySort {
669: if ( $Pos > 0 ) {
670: if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;}
671: else { $a <=> $b; }
672: }
673: else {
674: if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;}
675: else { $a cmp $b; }
676: }
677: }
678:
679: sub Build_Statistics {
680: $r->print(<<ENDPOP);
681: <script>
682: popwin=open('','popwin','width=400,height=100');
683: popwin.document.writeln('<html><body bgcolor="#88DDFF">'+
684: '<title>LON-CAPA Statistics</title>'+
685: '<h4>Computation Progress</h4>'+
686: '<form name=popremain>'+
687: '<input type=text size=35 name=remaining value=Starting></form>'+
688: '</body></html>');
689: popwin.document.close();
690: </script>
691: ENDPOP
692:
693: $r->rflush();
694: # ---------------------------- Gathering the Data of students' tries
695: my $index;
696: for ($index=0;$index<=$#students;$index++) {
697: #----------- update progress
698: $r->print('<script>popwin.document.popremain.remaining.value="'.
699: 'Computing '.($index+1).'/'.($#students+1).': '.
700: $students[$index].'";</script>');
701: $r->rflush();
702:
703: &ExtractStudentData($students[$index],$cid);
704: }
705:
706: # -------------------- sorting the Data
707: $r->print('<script>popwin.document.popremain.remaining.value="'.
708: 'Calculating Discrimination Factors...";</script>');
709:
710: @list = sort (@list);
711:
712:
713: &Discriminant();
714:
715: $OpSel2='';
716: $OpSel1='selected';
717:
718: $p_count = 0;
719: my $nIdx = 0;
720: my $dummy;
721: my $p_val;
722: my $ResId;
723: my $NoElements = $#list + 1;
724: #-------------------------------- loop for data representation
725: foreach (sort keys %mapsort) {
726: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
727: my @lpr=split(/\&/,$pr);
728: &CreateTable(1,$Hid);
729: for (my $i=1; $i<=$#lpr; $i++) {
730: my %storestats=();
731: my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
732: my $Temp = $Prob;
733: my $MxTries = 0;
734: my $TotalTries = 0;
735: my $YES = 0;
736: my $Incorrect = 0;
737: my $Override = 0;
738: my $StdNo = 0;
739: my @StdLst;
740: while ( $PrOrd == $lpr[$i] )
741: {
742: $nIdx++;
743: $StdNo++;
744: $StdLst[ $StdNo ] = $Tries;
745: $TotalTries += $Tries;
746: if ( $MxTries < $Tries ) { $MxTries = $Tries; }
747: if ( $Code eq 'C' ){ $YES++; }
748: elsif( $Code eq 'I' ) { $Incorrect++; }
749: elsif( $Code eq 'O' ) { $Override++; }
750: elsif( $Code eq 'U' ) { $StdNo--; }
751: ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
752: }
753:
754: $p_count++;
755: my $Dummy;
756: ($ResId,$Dummy)=split(/\*/,$Temp);
757:
758: $Temp = '<a href="'.$hash{'src_'.$ResId}.
759: '" target="_blank">'.$hash{'title_'.$ResId}.$Dummy.'</a>';
760:
761: my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});
762: my $urlres=$res;
763:
764: $ResId=~/(\d+)\.(\d+)/;
765: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
766: $urlres=$Map;
767:
768: $res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';
769: #$Map = '<a href="'.$Map.'">'.$res.'</a>';
770:
771: #------------------------ Compute the Average of Tries about one problem
772: my $Average = ($StdNo) ? $TotalTries/$StdNo : 0;
773:
774: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time;
775: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo;
776: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average;
777:
778: #-------------------------------- Compute percentage of Wrong tries
779: my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0;
780:
781: #-------------------------------- Compute Standard Deviation
782: my $StdDev = 0;
783: if ( $StdNo > 1 ) {
784: for ( my $n = 0; $n < $StdNo; $n++ ) {
785: my $Dif = $StdLst[ $n ]-$Average;
786: $StdDev += $Dif*$Dif;
787: }
788: $StdDev /= ( $StdNo - 1 );
789: $StdDev = sqrt( $StdDev );
790: }
791:
792: #-------------------------------- Compute Degree of Difficulty
793: my $DoDiff = 0;
794: if( $TotalTries > 0 ) {
795: $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries );
796: # $DoDiff = ($TotalTries)/($YES + $Override+ 0.1);
797: }
798:
799: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff;
800:
801: #-------------------------------- Compute the Skewness
802: my $Skewness = 0;
803: my $Sum = 0;
804: if ( $StdNo > 0 && $StdDev > 0 ) {
805: for ( my $n = 0; $n < $StdNo; $n++ ) {
806: my $Dif = $StdLst[ $n ]-$Average;
807: $Skewness += $Dif*$Dif*$Dif;
808: }
809: $Skewness /= $StdNo;
810: $Skewness /= $StdDev*$StdDev*$StdDev;
811: }
812:
813: #--------------------- Compute the Discrimination Factors
814: my ($UpD,$UpNo)=split(/\:/,$DisUp{$lpr[$i]});
815: my ($LwD,$LwNo)=split(/\:/,$DisLow{$lpr[$i]});
816: $UpNo = ($UpNo) ? $UpNo : 0;
817: $LwNo = ($LwNo) ? $LwNo : 0;
818: my $U_D = sprintf("%.2f", $UpD);
819: my $L_D = sprintf("%.2f", $LwD);
820: my $DisFac = $UpD - $LwD;
821: my $_Dis = sprintf("%.2f", $DisFac);
822:
823: #----------------- Some restition in presenting the float numbers
824: my $Avg = sprintf( "%.2f", $Average );
825: my $Wrng = sprintf( "%.1f", $Wrong );
826: my $SD = sprintf( "%.1f", $StdDev );
827: my $DoD = sprintf( "%.2f", $DoDiff );
828: my $Sk = sprintf( "%.1f", $Skewness );
829: my $join = $PrOrd.':'.$Temp.':'.$StdNo.':'.
830: $TotalTries.':'.$MxTries.':'.$Avg.':'.
831: $YES.':'.$Override.':'.$Wrng.':'.$DoD.':'.
832: $SD.':'.$Sk.':'.$_Dis.':'.$U_D.':'.
833: $L_D.':'.$UpNo.':'.$LwNo.':'.$Prob;
834: $CachData{($p_count-1)}=$join;
835:
836: $urlres=~/^(\w+)\/(\w+)/;
837: if ($StdNo) {
838: &Apache::lonnet::put('resevaldata',\%storestats,$1,$2);
839: }
840: #-------------------------------- Row of statistical table
841: if ( $DiscFlag == 0 ) {
842: &TableRow($join,$i,($p_count-1));
843: }
844: }
845: &CloseTable();
846: }
847: #--------------------- close Progress Line
848: $r->print('<script>popwin.close()</script>');
849: $r->rflush();
850: }
851:
852: sub Cache_Statistics {
853: my @list = ();
854: my $Useful;
855: my $UnUseful;
856: my %myHeader = reverse( %Header );
857: $Pos = $myHeader{$ENV{'form.sort'}};
858: if ($Pos > 0) {$Pos++;}
859: $p_count = 0;
860: foreach my $key( keys %CachData) {
861: my @Temp=split(/\:/,$CachData{$key});
862: if ( $Pos == 0 ) {
863: ($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]);
864: }
865: else {
866: $Useful = $Temp[$Pos];
867: }
868: $list[$p_count]=$Useful.'&'.$CachData{$key};
869: $p_count++;
870: }
871:
872: @list = sort MySort (@list);
873:
874: my $nIdx=0;
875:
876: if ( $Pos == 0 ) {
877: foreach (sort keys %mapsort) {
878: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
879: &CreateTable(1,$Hid);
880: my @lpr=split(/\&/,$pr);
881: for (my $i=1; $i<=$#lpr; $i++) {
882: my($Pre, $Post) = split(/\&/,$list[$nIdx]);
883: &TableRow($Post,$i,$nIdx);
884: $nIdx++;
885: }
886: &CloseTable();
887: }
888: }
889: else {
890: &CreateTable(0);
891: for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {
892: my($Pre, $Post) = split(/\&/,$list[$nIdx]);
893: &TableRow($Post,$nIdx,$nIdx);
894: }
895: &CloseTable();
896: }
897: }
898:
899: sub TableRow {
900: my ($Str,$Idx,$RealIdx)=@_;
901: my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,
902: $Override,$Wrng,$DoD,$SD,$Sk,$_Dis,$U_D,$L_D,$UpNo,$LwNo,
903: $Prob)=split(/\:/,$Str);
904: $r->print( "\n".'<tr>'.
905: "\n".'<td>'.($RealIdx+1).'</td>'.
906: "\n".'<td bgcolor="#FFFFFF">'.$Temp.'</td>'.
907: "\n".'<td bgcolor="#EEFFCC"> '.$StdNo.'</td>'.
908: "\n".'<td bgcolor="#EEFFCC">'.$TotalTries.'</td>'.
909: "\n".'<td bgcolor="#EEFFCC">'.$MxTries.'</td>'.
910: "\n".'<td bgcolor="#DDFFFF">'.$Avg.'</td>'.
911: "\n".'<td bgcolor="#DDFFFF"> '.$YES.'</td>'.
912: "\n".'<td bgcolor="#DDFFFF"> '.$Override.'</td>'.
913: "\n".'<td bgcolor="#FFDDDD"> '.$Wrng.'</td>'.
914: "\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
915: "\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
916: "\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
917: "\n".'<td bgcolor="#FFDDCC"> '.$_Dis.'</td>'.
918: "\n".'<td bgcolor="#FFFFDD"> '.$U_D.'</td>'.
919: "\n".'<td bgcolor="#FFFFDD"> '.$L_D.'</td>'.
920: "\n".'<td bgcolor="#FFFFDD"> '.$UpNo.'</td>'.
921: "\n".'<td bgcolor="#FFFFDD"> '.$LwNo.'</td>'.
922: "\n".'</tr>' );
923: $GraphDat{$RealIdx}=$DoD.':'.$Wrng;
924: }
925:
926: # ------------------------------------------- Prepare data for Graphical chart
927:
928: sub GetGraphData {
929: my $Tag = shift;
930: my $Col;
931: my $data='';
932: my $count = 0;
933: my $Max = 0;
934: my $cid=$ENV{'request.course.id'};
935: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
936: "_$ENV{'user.domain'}_$cid\_graph.db";
937: foreach (keys %GraphDat) {delete $GraphDat{$_};}
938: if (-e "$GraphDB") {
939: if (tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) {
940: if ( $Tag eq 'DoDiff Graph' ) {
941: $Tag = 'Degree-of-Difficulty';
942: $Col = 0;
943: }
944: else {
945: $Tag = 'Wrong-Percentage';
946: $Col = 1;
947: }
948: foreach (sort NumericSort keys %GraphDat) {
949: my @Temp=split(/\:/,$GraphDat{$_});
950: my $inf = $Temp[$Col];
951: if ( $Max < $inf ) {$Max = $inf;}
952: $data .= $inf.',';
953: $count++;
954: }
955: untie(%GraphDat);
956: my $Course = $ENV{'course.'.$cid.'.description'};
957: $Course =~ s/\ /"_"/eg;
958: $GData=$Course.'&'.$Tag.'&'.$Max.'&'.$count.'&'.$data;
959:
960: }
961: else {
962: $r->print("Unable to tie hash to db file");
963: }
964: }
965: }
966:
967:
968: sub initial {
969: # --------------------------------- Initialize the global varaibles
970: undef @students;
971: undef @cols;
972: undef %maps;
973: undef %section;
974: undef %StuBox;
975: undef @list;
976: undef %CachData;
977: undef %GraphDat;
978: undef %DiscFac;
979: undef $CurMap;
980: undef $CurSec;
981: undef $CurStu;
982: undef $p_count;
983: undef $Pos;
984: undef $GData;
985: $DiscFlag=0;
986: $P_Order=100000;
987: $HWN=$P_Order;
988: }
989:
990:
991: sub ClassList {
992:
993: &GetStatus();
994:
995: $cid=$ENV{'request.course.id'};
996: my $chome=$ENV{'course.'.$cid.'.home'};
997: my ($cdom,$cnum)=split(/\_/,$cid);
998: # ----------------------- Get first and last resource, see if there is anything
999: $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
1000: $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
1001: if (($firstres) && ($lastres)) {
1002: # ----------------------------------------------------------------- Render page
1003: my $classlst=&Apache::lonnet::reply
1004: ('dump:'.$cdom.':'.$cnum.':classlist',$chome);
1005: my $StudNo = 0;
1006: my $now=time;
1007: unless ($classlst=~/^error\:/) {
1008: foreach (sort split(/\&/,$classlst)) {
1009: my ($name,$value)=split(/\=/,$_);
1010: my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
1011: $name=&Apache::lonnet::unescape($name);
1012: my ($sname,$sdom)=split(/\:/,$name);
1013: my $active=1;
1014: my $Status=$ENV{'form.status'};
1015: $Status = ($Status) ? $Status : 'Active';
1016: if ( ( ($end) && $now > $end ) &&
1017: ( ($Status eq 'Active') ) ) { $active=0; }
1018: if ( ($Status eq 'Expired') &&
1019: ($end == 0 || $now < $end) ) { $active=0; }
1020: if ($active) {
1021: my $thisindex=$#students+1;
1022: $name=&Apache::lonnet::unescape($name);
1023: $students[$thisindex]=$name;
1024: my ($sname,$sdom)=split(/\:/,$name);
1025:
1026: #my %reply=&Apache::lonnet::idrget($sdom,$sname);
1027: #my $reply=&Apache::lonnet::reply('get:'.$sdom.':'.$sname.
1028: # ':environment:lastname&generation&firstname&middlename',
1029: # &Apache::lonnet::homeserver($sname,$sdom));
1030: my $ssec=&usection($sdom,$sname,$cid,$Status);
1031: if ($ssec==-1) {next;}
1032: $ssec=($ssec) ? $ssec : '(none)';
1033: #$ssec=(int($ssec)) ? int($ssec) : $ssec;
1034: #$r->print($sname.'...'.$ssec.'<br>');
1035: $section{$ssec}=$ssec;
1036: if ($CurSec eq 'All Sections' || $ssec eq $CurSec) {
1037: $students[$StudNo]=$name;
1038: $StuBox{$sname}=$sdom;
1039: }
1040: $StudNo++;
1041: }
1042: }
1043: }
1044: else {
1045: $r->print('<h1>Could not access course data</h1>');
1046: }
1047: $r->print("Total number of students : ".($#students+1));
1048: $r->rflush();
1049: # --------------- Find all assessments and put them into some linear-like order
1050: &tracetable($firstres,'&'.$lastres.'&');
1051:
1052: # my $c=0;
1053: # foreach (sort keys %mapsort) {
1054: # $r->print('<br>'.$c.')'.$_.' ... '.$mapsort{$_});
1055: # $c++;
1056: # }
1057: #foreach(@cols) {
1058: # $c++;
1059: # $r->print('<br>'.$cols[$c]);
1060: #}
1061: #$r->print('<br> Count = '.$c);
1062:
1063: }
1064:
1065: # ------------------------------------------------------------- End render page
1066: else {
1067: $r->print('<h3>Undefined course sequence</h3>');
1068: }
1069: &MapSecOptions();
1070: }
1071:
1072:
1073: sub Menu {
1074: my $InpStr = $ENV{'form.sort'};
1075: if ( $InpStr eq 'DoDiff Graph' || $InpStr eq '%Wrong Graph' ) {
1076: &GetGraphData($InpStr);
1077: $r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />');
1078: }
1079: else {
1080: $r->print('<html><head><title>LON-CAPA Statistics</title></head>');
1081:
1082:
1083: $r->print('<body bgcolor="#FFFFFF">'.
1084: '<script>window.focus(); window.width=500;window.height=500; </script>'.
1085: '<img align=right src=/adm/lonIcons/lonlogos.gif>');
1086: # ---------------------------------------------------------------- Course title
1087: $r->print('<h1> Course : "'.
1088: $ENV{'course.'.$ENV{'request.course.id'}.
1089: '.description'}.'"</h1><h2>'.localtime().'</h2>');
1090: # ------------------------------- This is going to take a while, produce output
1091: $r->rflush();
1092:
1093: $r->print("\n".'<form name=stat method=post action="/adm/statistics" >');
1094:
1095: my $content = $ENV{'form.sort'};
1096: if ($content eq '' || $content eq 'Return to Menu') {
1097: my $Ptr = '<h3>';
1098: $Ptr .= '<input type=submit name=sort value="Problem Evaluation"/>';
1099: $Ptr .= '<br><br>';
1100: $Ptr .= '<input type=submit name=sort value="Student Assessment"/>';
1101: $Ptr .= '</h3>';
1102: $r->print( $Ptr );
1103: }
1104: else {
1105: &initial();
1106: &ClassList();
1107: if ( $content eq 'Discrimination' || #'Problem Evaluation' ||
1108: $content eq 'Recalculate Discrimintion Factor' ) {
1109: &CreateDiscFac();
1110: }
1111: elsif ( $content eq 'Student Assessment' ||
1112: $content eq 'Create Student Report' ) {
1113: &StudentOptions();
1114: &StudentReport($CurStu,$StuBox{"$CurStu"});
1115: }
1116: else {
1117: &PreStatTable();
1118: }
1119: }
1120: $r->print("\n".'</form>'.
1121: "\n".'</body>'.
1122: "\n".'</html>');
1123: $r->rflush();
1124: }
1125: }
1126:
1127: sub StudentOptions {
1128: my $OpSel5='';
1129: $CurStu = $ENV{'form.student'};
1130: if ( $CurStu eq '' ) {
1131: $CurStu = 'All Students';
1132: $OpSel5 = 'selected';
1133: }
1134: my $Ptr ='';
1135: # ----------------------------------- Loading the Students Combobox
1136: $Ptr .= '<br><b>Select Student</b>'."\n".
1137: '<select name="student">'."\n".
1138: '<option '.$OpSel5.'>All Students</option>';
1139: foreach my $key ( sort keys %StuBox ) {
1140: $Ptr .= '<option';
1141: if ($CurStu eq $key) {$Ptr .= ' selected';}
1142: $Ptr .= '>'.$key."</option>\n";
1143: }
1144: $Ptr .= '</select>';
1145: $Ptr .= '<br><input type="submit" name="sort" value="Create Student Report" />';
1146: $r->print( $Ptr );
1147: $r->rflush();
1148: }
1149:
1150: sub GetStatus {
1151:
1152: # $OpSelDis1='';
1153: # $OpSelDis2='';
1154: $OpSel1='';
1155: $OpSel2='';
1156: $OpSel3='';
1157: $OpSel4='';
1158:
1159: # if ( $ENV{'form.DisType'} eq 'Total Number of Correct Answers' ) {
1160: # $OpSelDis1='selected';
1161: # $CurDis=0;
1162: # }
1163: # else { $OpSel2 = 'selected'; $CurDis = 1;}
1164:
1165: if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
1166: else { $OpSel1 = 'selected'; }
1167:
1168: my %myHeader = reverse( %Header );
1169: $Pos = $myHeader{$ENV{'form.sort'}};
1170: if ($Pos == 0) {
1171: $OpSel1 = 'selected';
1172: $ENV{'form.order'}='Ascendig';
1173: }
1174:
1175: $CurMap = $ENV{'form.maps'};
1176: if ( $CurMap eq '' ) {
1177: $CurMap = 'All Maps';
1178: $OpSel3 = 'selected';
1179: }
1180: $CurSec = $ENV{'form.section'};
1181: if ( $CurSec eq '' ) {
1182: $CurSec = 'All Sections';
1183: $OpSel4 = 'selected';
1184: }
1185: }
1186:
1187:
1188: sub MapSecOptions {
1189: # ----------------------------------- Loading the Maps Combobox
1190: my $Ptr = '<br>';
1191: $Ptr .= '<br><input type="submit" name="sort" value="Return to Menu" />';
1192: $Ptr .= '<br><b> Select Map </b>'."\n".
1193: '<select name="maps">'."\n".
1194: '<option '.$OpSel3.'>All Maps</option>';
1195: foreach my $key ( sort keys %maps ) {
1196: $Ptr .= '<option';
1197: if ($CurMap eq $key) {$Ptr .= ' selected';}
1198: $Ptr .= '>'.$key."</option>\n";
1199: }
1200: $Ptr .= '</select>';
1201: $Ptr .= ' ';
1202:
1203: # ----------------------------------- Loading the Sections Combobox
1204: $Ptr .= '<br><b>Select Section</b>'."\n".
1205: '<select name="section">'."\n".
1206: '<option '.$OpSel4.'>All Sections</option>';
1207: foreach my $key ( sort keys %section ) {
1208: $Ptr .= '<option';
1209: if ($CurSec eq $key) {$Ptr .= ' selected';}
1210: $Ptr .= '>'.$key."</option>"."\n";
1211: }
1212: $Ptr .= '</select>'."\n";
1213:
1214: $r->print( $Ptr );
1215: $r->rflush();
1216: }
1217:
1218:
1219: # ================================================================ Main Handler
1220:
1221: sub handler {
1222: $r=shift;
1223:
1224: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
1225: # ------------------------------------------- Set document type for header only
1226: if ($r->header_only) {
1227: if ($ENV{'browser.mathml'}) {
1228: $r->content_type('text/xml');
1229: }
1230: else {
1231: $r->content_type('text/html');
1232: }
1233: $r->send_http_header;
1234: return OK;
1235: }
1236: my $requrl=$r->uri;
1237: # ----------------------------------------------------------------- Tie db file
1238:
1239: undef %hash;
1240:
1241: if ($ENV{'request.course.fn'}) {
1242: my $fn=$ENV{'request.course.fn'};
1243: if (-e "$fn.db") {
1244: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
1245: # ------------------------------------------------------------------- Hash tied
1246: $r->content_type('text/html');
1247: $r->send_http_header;
1248: &Menu();
1249: }
1250: else {
1251: $r->content_type('text/html');
1252: $r->send_http_header;
1253: $r->print('<html><body>Coursemap undefined.</body></html>');
1254: }
1255: # ------------------------------------------------------------------ Untie hash
1256: unless (untie(%hash)) {
1257: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1258: "Could not untie coursemap $fn (browse).</font>");
1259: }
1260:
1261: # -------------------------------------------------------------------- All done
1262: return OK;
1263: # ----------------------------------------------- Errors, hash could no be tied
1264: }
1265: }
1266: else {
1267: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
1268: return HTTP_NOT_ACCEPTABLE;
1269: }
1270: }
1271: else {
1272: $ENV{'user.error.msg'}=
1273: $r->uri.":vgr:0:0:Cannot view grades for complete course";
1274:
1275: return HTTP_NOT_ACCEPTABLE;
1276: }
1277: }
1278: 1;
1279: __END__
1280:
1281:
1282:
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