1: # The LearningOnline Network with CAPA
2: # (Publication Handler
3: #
4: # $Id: lonstatistics.pm,v 1.12 2002/03/22 00:18:12 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, 3/17, 3/21 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 Apache::loncommon;
43: use HTML::TokeParser;
44: use GDBM_File;
45:
46: # -------------------------------------------------------------- Module Globals
47: my %hash;
48: my %CachData;
49: my %GraphDat;
50: my %OpResp;
51: my %maps;
52: my %mapsort;
53: my %section;
54: my %StuBox;
55: my %DiscFac;
56: my %DisUp;
57: my %DisLow;
58: my $UpCnt;
59: my $CurMap;
60: my $CurSec;
61: my $CurStu;
62: my @cols;
63: my @list;
64: my @students;
65: my $p_count;
66: my $Pos;
67: my $r;
68: my $OpSel1;
69: my $OpSel2;
70: my $OpSelDis1;
71: my $OpSelDis2;
72: my $OpSel3;
73: my $OpSel4;
74: my $GData;
75: my $cid;
76: my $firstres;
77: my $lastres;
78: my $DiscFlag;
79: my $HWN;
80: my $P_Order;
81: my %Header = (0,"Homework Sets Order",1,"#Stdnts",2,"Tries",3,"Mod",
82: 4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff",
83: 9,"S.D.",10,"Skew.",11,"D.F.1st",12,"D.F.2nd");#,13,"OpResp");
84:
85:
86: #------- Processing upperlist and lowerlist according to each problem
87: sub ProcessDisc {
88: my @List = @_;
89: @List = sort (@List);
90: my $Count = $#List+1;
91: my $Prb;
92: my @Dis;
93: my $Slvd=0;
94: my $tmp;
95: my $Sum1=0;
96: my $Sum2=0;
97: my $nIdx=0;
98: my $nStud=0;
99: my %Proc;
100: undef %Proc;
101: while ($nIdx<$Count) {
102: ($Prb,$tmp)=split(/\=/,$List[$nIdx]);
103: @Dis=split(/\+/,$tmp);
104: my $Temp = $Prb;
105: do {
106: $nIdx++;
107: $nStud++;
108: $Sum1 += $Dis[0];
109: $Sum2 += $Dis[1];
110: ($Prb,$tmp)=split(/\=/,$List[$nIdx]);
111: @Dis=split(/\+/,$tmp);
112: } while ( $Prb eq $Temp && $nIdx < $Count );
113: # $Proc{$Temp}=($Sum1/$nStud).':'.$nStud;
114: $Proc{$Temp}=($Sum1/$nStud).':'.($Sum2/$nStud);
115: # $r->print("$nIdx) $Temp --> ($nStud) $Proc{$Temp} <br>");
116: $Sum1=0;
117: $Sum2=0;
118: $nStud=0;
119: }
120: return %Proc;
121: }
122:
123:
124: #------- Creating Discimination factor
125: sub Discriminant {
126: my $Count=0;
127: foreach (keys(%DiscFac)){
128: $Count++;
129: }
130: $UpCnt = int(0.27*$Count);
131: my $low=0;
132: my $up=$Count-$UpCnt;
133: my @UpList=();
134: my @LowList=();
135: $Count=0;
136: foreach my $key (sort(keys(%DiscFac))){
137: $Count++;
138: #$r->print("<br>$Count) $key = $DiscFac{$key}");
139: if ($low < $UpCnt || $Count > $up) {
140: $low++;
141: my $str=$DiscFac{$key};
142: foreach(split(/\:/,$str)){
143: if ($_) {
144: if ($low<$UpCnt){push(@LowList,$_);}
145: else {push(@UpList,$_);}
146: }
147: }
148: }
149: }
150: %DisUp=&ProcessDisc(@UpList);
151: %DisLow=&ProcessDisc(@LowList);
152: }
153:
154:
155: sub NumericSort {
156: $a <=> $b;
157: }
158:
159: # ------ Create different Student Report
160: sub StudentReport {
161:
162: my ($sname,$sdom)=@_;
163:
164: if ( $sname eq 'All Students' ) {
165: $r->print( '<h3><font color=blue>WARNING:
166: Please select a student</font></h3>' );
167: return;
168: }
169: my $shome=&Apache::lonnet::homeserver($sname,$sdom);
170: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );
171: my %result = ();
172: my $ResId;
173: my $PrOrd;
174: my $Code;
175: my $Tries;
176: my $TotalTries = 0;
177: my $ParCr = 0;
178: my $Wrongs;
179: my %TempHash;
180: my $Version;
181: my $LatestVersion;
182: my $PtrTry='';
183: my $PtrCod='';
184: my $SetNo=0;
185: my $Str = "\n".'<table border=2>'.
186: "\n".'<tr>'.
187: "\n".'<th> # </th>'.
188: "\n".'<th> Set Title </th>'.
189: "\n".'<th> Results </th>'.
190: "\n".'<th> Tries </th>'.
191: "\n".'</tr>';
192: unless ($reply=~/^error\:/) {
193: foreach (split(/\&/,$reply)){
194: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
195: $result{$name}=$value;
196: }
197: foreach my $CurCol (@cols) {
198: if (!$CurCol){
199: my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});
200: if ( $Set ) {
201: $SetNo++;
202: $Str .= "\n"."<tr>".
203: "\n"."<td> $SetNo </td>".
204: "\n"."<td> $Set </td>".
205: "\n"."<td> $PtrCod </td>".
206: "\n"."<td> $PtrTry</td>".
207: "\n"."</tr>";
208: }
209: $PtrTry='';
210: $PtrCod='';
211: next;
212: }
213: ($PrOrd,$ResId)=split(/\:/,$CurCol);
214: $ResId=~/(\d+)\.(\d+)/;
215: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
216: if ( $CurMap ne 'All Maps' ) {
217: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
218: if ( $Map ne $ResMap ) { next; }
219: }
220: my $meta=$hash{'src_'.$ResId};
221: my $PartNo = 0;
222: undef %TempHash;
223: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))){
224: if ($_=~/^stores\_(\w+)\_tries$/) {
225: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
226: if ( $TempHash{"$Part"} eq '' ) {
227: $TempHash{"$Part"} = $Part;
228: $TempHash{$PartNo}=$Part;
229: $TempHash{"$Part.Code"} = '-';
230: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
231: $PartNo++;
232: }
233: }
234: #if ($_=~/^parameter\_(\w+)\_package$/) {
235: }
236:
237: my $Prob = $Map.'___'.$2.'___'.
238: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
239: $Code='U';
240: $Tries = 0;
241: $Wrongs = 0;
242: $LatestVersion = $result{"version:$Prob"};
243: if ( $LatestVersion ) {
244: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
245: my $vkeys = $result{"$Version:keys:$Prob"};
246: my @keys = split(/\:/,$vkeys);
247:
248: foreach my $Key (@keys) {
249: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
250: my $Part = $1;
251: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
252: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
253: $TotalTries += $Tries;
254: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
255: if ( $Val eq 'correct_by_student' )
256: { $Wrongs = $Tries - 1; $Code = 'Y'; }
257: elsif ( $Val eq 'correct_by_override' )
258: { $Wrongs = $Tries - 1; $Code = 'y'; }
259: elsif ( $Val eq 'incorrect_attempted' ||
260: $Val eq 'incorrect_by_override' )
261: { $Wrongs = $Tries; $Code = 'N'; }
262: $TempHash{"$Part.Code"} = $Code;
263: $TempHash{"$Part.Wrongs"} = $Wrongs;
264: }
265: }
266: }
267: for ( my $n = 0; $n < $PartNo; $n++ ) {
268: my $part = $TempHash{$n};
269: if ($PtrTry ne '') {$PtrTry .= ',';}
270: $PtrTry .= "$TempHash{$part.'.Tries'}";
271: $PtrCod .= "$TempHash{$part.'.Code'}";
272: }
273: }
274: else {
275: for(my $n=0; $n<$PartNo; $n++) {
276: if ($PtrTry ne '') {$PtrTry .= ',';}
277: $PtrTry .= "0";
278: $PtrCod .= "-";
279: }
280: }
281: }
282: }
283: $Str .= "\n".'</table>';
284: $r->print($Str);
285: $r->rflush();
286: }
287:
288: sub CreateTable {
289: my $ColNo=0;
290: foreach (keys(%Header)){
291: $ColNo++;
292: }
293: my ($Hd, $Hid)=@_;
294: if ( $Hd == 1 ) {
295: $r->print('<br><a href="'.$hash{'src_'.$Hid}.
296: '" target="_blank">'.$hash{'title_'.$Hid}.'</a>');
297: }
298: my $Result = "\n".'<table border=2>';
299: $Result .= '<tr><th>P#</th>'."\n";
300: for ( my $nIdx=0; $nIdx < $ColNo; $nIdx++ ) {
301: $Result .= '<th>'.'<input type="submit" name="sort" value="'.
302: $Header{$nIdx}.'" />'.'</th>'."\n";
303: }
304: $Result .= "\n".'</tr>'."\n";
305: $r->print( $Result );
306: $r->rflush();
307: }
308:
309: sub CloseTable {
310: $r->print("\n".'</table>'."\n");
311: $r->rflush();
312: }
313:
314: # ------------------------------------------- Prepare Statistics Table
315: sub PreStatTable {
316: my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
317: "_$ENV{'user.domain'}_$cid\_statistics.db";
318: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
319: "_$ENV{'user.domain'}_$cid\_graph.db";
320: my $OpSel11='';
321: my $OpSel12='';
322: my $OpSel13='';
323: my $Status = $ENV{'form.status'};
324: if ( $Status eq 'Any' ) { $OpSel13='selected'; }
325: elsif ($Status eq 'Expired' ) { $OpSel12 = 'selected'; }
326: else { $OpSel11 = 'selected'; }
327:
328: my $Ptr = '';
329: $Ptr .= '<br><b> Student Status: </b>'."\n".
330: '<select name="status">'.
331: '<option '.$OpSel11.' >Active</option>'."\n".
332: '<option '.$OpSel12.' >Expired</option>'."\n".
333: '<option '.$OpSel13.' >Any</option> </select> '."\n";
334: $Ptr .= ' ';
335: $Ptr .= '<input type=submit name=sort value="Recalculate Statistics"/>'."\n";
336:
337: $Ptr .= '<br><b> Sorting Type: </b>'."\n".
338: '<select name="order"> <option '.$OpSel1.' >Ascending</option>'."\n".
339: '<option '.$OpSel2.'>Descending</option> </select> '."\n";
340: $Ptr .= ' ';
341: $Ptr .= '<input type="submit" name="sort" value="DoDiff Graph" />'."\n";
342: $Ptr .= ' ';
343: $Ptr .= '<input type="submit" name="sort" value="%Wrong Graph" />'."\n";
344:
345: $Ptr .= '<pre>'.
346: '<b> #Stdnts</b>: Total Number of Students opened the problem.<br>'.
347: '<b> Tries </b>: Total Number of Tries for solving the problem.<br>'.
348: '<b> Mod </b> : Maximunm Number of Tries for solving the problem.<br>'.
349: '<b> Mean </b>: Average Number of the tries. [ Tries / #Stdnts ]<br>'.
350: '<b> #YES </b>: Number of students solved the problem correctly.<br>'.
351: '<b> #yes </b>: Number of students solved the problem by override.<br>'.
352: '<b> %Wrng </b>: Percentage of students tried to solve the problem but'.
353: ' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
354: # ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'. Kashy formula
355: '<b> DoDiff </b>: Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'. #Gerd formula
356: '<b> S.D. </b> : Standard Deviation of the tries.'.
357: '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
358: ' where Xi denotes every student\'s tries ]<br>'.
359: '<b> Skew. </b>: Skewness of the students tries.'.
360: ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
361: '<b> Dis.F. </b>: Discrimination Factor: A Standard for '.
362: 'evaluating the problem according to a Criterion<br>'.
363: '<b> [Applied Criterion in %27 Upper Students - '.
364: 'Applied the same Criterion in %27 Lower Students]</b><br>'.
365: '<b> 1st </b>Criterion for Sorting the Students: '.
366: 'Sum of Partial Credit Awarded / Total Number of Tries<br>'.
367: '<b> 2nd </b>Criterion for Sorting the Students: '.
368: 'Total number of Correct Answers / Total Number of Tries'.
369: '</pre>';
370:
371: $r->print($Ptr);
372: $r->rflush();
373:
374: if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {
375: if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {
376: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
377: &Cache_Statistics();
378: }
379: else {
380: $r->print("Unable to tie hash to db file");
381: }
382: }
383: else {
384: if (tie(%CachData,'GDBM_File',$CacheDB,&GDBM_WRCREAT,0640)) {
385: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
386: foreach (keys %DiscFac) {delete $CachData{$_};}
387: foreach (keys %CachData) {delete $CachData{$_};}
388: $DiscFlag=0;
389: &Build_Statistics();
390: }
391: else {
392: $r->print("Unable to tie hash to db file");
393: }
394: }
395:
396: #33333
397: # my $c=0;
398: # foreach (sort keys %OpResp) {
399: # $r->print('<br>'.$c.$_.' ====== '.$OpResp{$_});
400: # my $count=$#students+1;
401: # for (my $n=0;$n<1;$n++){
402: # my ($sname,$sdom)=$students[$n];
403: # my $Prob=$OpResp{$_};
404: ##my $userview=&Apache::lonnet::ssi($hash{'src_'.$ResId});
405: # $r->print('<br>'.$Prob.$sname.$sdom.$cid.
406: # '<br>'.&Apache::loncommon::get_previous_attempt($Prob,$sname,$sdom,$cid));
407: # #$r->print('<br>'.$Prob.$sname. ' *** '.&Apache::lonnet::ssi($hash{'src_'.$Prob}));
408: # }
409: # $c++;
410: # }
411:
412: #$r->print('Total instances of the problems : '.($p_count*($#students+1)));
413:
414: untie(%CachData);
415: untie(%GraphDat);
416: }
417:
418:
419: # ------------------------------------- Find the section of student in a course
420:
421: sub usection {
422: my ($udom,$unam,$courseid,$ActiveFlag)=@_;
423: $courseid=~s/\_/\//g;
424: $courseid=~s/^(\w)/\/$1/;
425: foreach (split(/\&/,&Apache::lonnet::reply('dump:'.
426: $udom.':'.$unam.':roles',
427: &Apache::lonnet::homeserver($unam,$udom)))){
428: my ($key,$value)=split(/\=/,$_);
429: $key=&Apache::lonnet::unescape($key);
430: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
431: my $section=$1;
432: if ($key eq $courseid.'_st') { $section=''; }
433: my ($dummy,$end,$start)=split(/\_/,&Apache::lonnet::unescape($value));
434: if ( $ActiveFlag ne 'Any' ) {
435: my $now=time;
436: my $notactive=0;
437: if ($start) {
438: if ($now<$start) { $notactive=1; }
439: }
440: if ($end) {
441: if ($now>$end) { $notactive=1; }
442: }
443: if ((($ActiveFlag eq 'Expired') && $notactive == 1) ||
444: (($ActiveFlag eq 'Active') && $notactive == 0 ) ) {
445: return $section;
446: }
447: else { return '-1'; }
448: }
449: return $section;
450: }
451: }
452: return '-1';
453: }
454:
455:
456: # ------ Dump the Student's DB file and handling the data for statistics table
457:
458: sub ExtractStudentData {
459: my ($student,$coid)=@_;
460: my ($sname,$sdom) = split( /\:/, $student );
461: my $shome=&Apache::lonnet::homeserver( $sname,$sdom );
462: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );
463: my %result = ();
464: my $ResId;
465: my $PrOrd;
466: my $Dis = '';
467: my $Code;
468: my $Tries;
469: my $ParCr;
470: my $TotalTries = 0;
471: my $TotalOpend = 0;
472: my $ProbSolved = 0;
473: my $ProbTot = 0;
474: my $TimeTot = 0;
475: my $TotParCr = 0;
476: my $Wrongs;
477: my %TempHash;
478: my $Version;
479: my $LatestVersion;
480: my $SecLimit;
481: my $MapLimit;
482: unless ($reply=~/^error\:/) {
483: foreach (split(/\&/,$reply)) {
484: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
485: $result{$name}=$value;
486: }
487: foreach my $CurCol(@cols) {
488: ($PrOrd,$ResId)=split(/\:/,$CurCol);
489: if ( !$CurCol ) { next; }
490: $ResId=~/(\d+)\.(\d+)/;
491: my $MapId=$1;
492: my $PrbId=$2;
493: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$MapId} );
494: if ( $CurMap ne 'All Maps' ) {
495: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
496: if ( $Map ne $ResMap ) { next; }
497: }
498: my $meta=$hash{'src_'.$ResId};
499: my $PartNo = 0;
500: $Dis .= ':';
501: undef %TempHash;
502:
503: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
504: if ($_=~/^stores\_(\w+)\_tries$/) {
505: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
506: if ( $TempHash{"$Part"} eq '' ) {
507: $TempHash{"$Part"} = $Part;
508: $TempHash{$PartNo}=$Part;
509: $TempHash{"$Part.Code"} = 'U';
510: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
511: $PartNo++;
512: }
513: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
514: }
515: }
516:
517: my $Prob = $Map.'___'.$PrbId.'___'.
518: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
519: $OpResp{$PrOrd}=$Prob;
520: $Code='U';
521: $Tries = 0;
522: $ParCr = 0;
523: $Wrongs = 0;
524: $LatestVersion = $result{"version:$Prob"};
525:
526: if ( $LatestVersion ) {
527: #333333333
528: #my $userview=&Apache::lonnet::ssi($hash{'src_'.$ResId});
529: #$r->print('<br>'.$userview);
530: #$r->print('<br>'.$Prob.$sname.$sdom.$coid.'<br>'.&get_student_answers($Prob,$sname,$sdom,$coid));
531:
532: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
533: my $vkeys = $result{"$Version:keys:$Prob"};
534: my @keys = split(/\:/,$vkeys);
535:
536: foreach my $Key (@keys) {
537: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
538: my $Part = $1;
539: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
540: $ParCr = $result{"$Version:$Prob:resource.$Part.awarded"};
541: my $Time = $result{"$Version:$Prob:timestamp"};
542: $TempHash{"$Part.Time"} = ($Time) ? $Time : 0;
543: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
544: $TempHash{"$Part.ParCr"} = ($ParCr) ? $ParCr : 0;
545: $TotalTries += $TempHash{"$Part.Tries"};
546: $TotParCr += $TempHash{"$Part.ParCr"};
547: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
548: if ( $Val eq 'correct_by_student' )
549: { $Wrongs = $Tries - 1; $Code = 'C'; }
550: elsif ( $Val eq 'correct_by_override' )
551: { $Wrongs = $Tries - 1; $Code = 'O'; }
552: elsif ( $Val eq 'incorrect_attempted' ||
553: $Val eq 'incorrect_by_override' )
554: { $Wrongs = $Tries; $Code = 'I'; }
555: $TempHash{"$Part.Code"} = $Code;
556: $TempHash{"$Part.Wrongs"} = $Wrongs;
557: }
558: }
559: }
560: for ( my $n = 0; $n < $PartNo; $n++ ) {
561: my $part = $TempHash{$n};
562: my $Yes = 0;
563: if ( $TempHash{$part.'.Code'} eq 'C' ||
564: $TempHash{$part.'.Code'} eq 'O' )
565: {$ProbSolved++;$Yes=1;}
566:
567: # my $ptr = "$hash{'title_'.$ResId}";
568: my $ptr = $TempHash{$part.'.PrOrd'}.'&'.$ResId;
569:
570: if ( $PartNo > 1 ) {
571: $ptr .= "*(part $part)";
572: $Dis .= '&';
573: }
574: my $Fac = ($TempHash{"$part.Tries"}) ?
575: ($TempHash{"$part.ParCr"}/$TempHash{"$part.Tries"}) : 0;
576: my $DisF;
577: if ( $Fac > 0 && $Fac < 1 ) {
578: $DisF = sprintf( "%.4f", $Fac );
579: }
580: else {$DisF = $Fac;}
581: # $DisF .= '+'.$TempHash{"$part.Time"};
582: $TimeTot += $TempHash{"$part.Time"};
583: $Dis .= $TempHash{$part.'.PrOrd'}.'='.$DisF.'+'.$Yes;
584: $ptr .= "&$TempHash{$part.'.Tries'}".
585: "&$TempHash{$part.'.Wrongs'}".
586: "&$TempHash{$part.'.Code'}";
587: push (@list, $ptr);
588: $TotalOpend++;
589: $ProbTot++;
590: }
591: }
592: #else {
593: #for(my $n=0; $n<$PartNo; $n++) {
594: # push (@list, "$TempHash{'0'.'.PrOrd'}.':'.$ResId:0:0:U");
595: # $ProbTot++;
596: #}
597: #}
598: }
599: if ( $TotalTries ) {
600: my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;
601: my $DisFactor = sprintf( "%.4f", $DisFac );
602: $DiscFac{$DisFactor}=$Dis;
603: #my $time;
604: #if ($ProbSolved){
605: #$time = int(($TimeTot/$ProbSolved)-10000000);
606: #}
607: #$DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.
608: # $TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;
609: }
610: }
611: #$r->print($sname.' PrCr= '.$TotParCr.' Slvd= '.$ProbSolved.' Tries='.$TotalTries.'<br>');
612: }
613:
614:
615: # ------------------------------------------------------------ Build page table
616: sub tracetable {
617: my ($rid,$beenhere)=@_;
618: my $IsMap=0;
619: $rid=~/(\d+)\.(\d+)/;
620: $maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};
621: #$maps{$HWN}=$hash{'title_'.$rid};
622: unless ($beenhere=~/\&$rid\&/) {
623: $beenhere.=$rid.'&';
624: if (defined($hash{'is_map_'.$rid})) {
625: my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};
626: if ( $cmap eq 'sequence' || $cmap eq 'page' ) {
627: $cols[$#cols+1]=0;
628: $P_Order++;
629: $HWN=$P_Order;
630: $mapsort{$HWN} = $rid.':';
631: $IsMap=1;
632:
633: #$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=
634: # $hash{'title_'.$rid};
635: }
636: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
637: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
638: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
639:
640: &tracetable($hash{'map_start_'.$hash{'src_'.$rid}},
641: '&'.$frid.'&');
642:
643: $cols[$#cols+1]=($P_Order+1).':'.$frid;
644:
645: my $meta=$hash{'src_'.$frid};
646: my $PartNo = 0;
647: if ($IsMap==0){
648: if ($meta) {
649: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
650: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
651: if ($_=~/^stores\_(\w+)\_tries$/) {
652: &Apache::lonnet::metadata($meta,$_.'.part');
653: $P_Order++;
654: $mapsort{$HWN} .= '&'.$P_Order;
655: $PartNo++;
656: #$r->print('<br>'.$PartNo.'---'.$P_Order);
657: }
658: }
659: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'packages'))) {
660: if ($_=~/^optionresponse\_(\w+)\_(\w+)$/) {
661: # $r->print('<br>'.$_.&Apache::lonnet::metadata($meta,$_));
662: $r->print('<br>'.$_.'...'.$P_Order);
663: $OpResp{$P_Order+1}=$frid;
664: }
665: }
666: }
667: }
668: }
669: }
670: } else {
671: $cols[$#cols+1]=($P_Order+1).':'.$rid;
672: my $meta=$hash{'src_'.$rid};
673: my $PartNo = 0;
674: if ($meta) {
675: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
676: foreach my $Key(split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
677: if ($Key=~/^stores\_(\w+)\_tries$/) {
678: my $Part=&Apache::lonnet::metadata($meta,$Key.'.part');
679: $P_Order++;
680: $mapsort{$HWN} .= '&'.$P_Order;
681: $PartNo++;
682: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'packages'))) {
683: if ($_=~/^optionresponse\_($Part)\_(\w+)$/) {
684: #$r->print('<br>'.$_.'...'.$P_Order.'---'.$Part);
685: $OpResp{$P_Order+1}=$rid;
686: }
687:
688: }
689:
690: }
691: }
692: }
693: }
694: }
695: if (defined($hash{'to_'.$rid})) {
696: foreach (split(/\,/,$hash{'to_'.$rid})){
697: &tracetable($hash{'goesto_'.$_},$beenhere);
698: }
699: }
700: }
701: }
702:
703: sub MySort {
704: if ( $Pos > 0 ) {
705: if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;}
706: else { $a <=> $b; }
707: }
708: else {
709: if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;}
710: else { $a cmp $b; }
711: }
712: }
713:
714: sub Build_Statistics {
715: $r->print(<<ENDPOP);
716: <script>
717: popwin=open('','popwin','width=400,height=100');
718: popwin.document.writeln('<html><body bgcolor="#88DDFF">'+
719: '<title>LON-CAPA Statistics</title>'+
720: '<h4>Computation Progress</h4>'+
721: '<form name=popremain>'+
722: '<input type=text size=35 name=remaining value=Starting></form>'+
723: '</body></html>');
724: popwin.document.close();
725: </script>
726: ENDPOP
727:
728: $r->rflush();
729: # ---------------------------- Gathering the Data of students' tries
730: my $index;
731: for ($index=0;$index<=$#students;$index++) {
732: #----------- update progress
733: $r->print('<script>popwin.document.popremain.remaining.value="'.
734: 'Computing '.($index+1).'/'.($#students+1).': '.
735: $students[$index].'";</script>');
736: $r->rflush();
737:
738: &ExtractStudentData($students[$index],$cid);
739: }
740:
741: # -------------------- sorting the Data
742: $r->print('<script>popwin.document.popremain.remaining.value="'.
743: 'Calculating Discrimination Factors...";</script>');
744:
745: @list = sort (@list);
746:
747:
748: &Discriminant();
749:
750: $OpSel2='';
751: $OpSel1='selected';
752:
753: $p_count = 0;
754: my $nIdx = 0;
755: my $dummy;
756: my $p_val;
757: my $ResId;
758: my $NoElements = $#list + 1;
759: #-------------------------------- loop for data representation
760: foreach (sort keys %mapsort) {
761: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
762: my @lpr=split(/\&/,$pr);
763: &CreateTable(1,$Hid);
764: for (my $i=1; $i<=$#lpr; $i++) {
765: my %storestats=();
766: my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\&/,$list[$nIdx]);
767: my $Temp = $Prob;
768: my $MxTries = 0;
769: my $TotalTries = 0;
770: my $YES = 0;
771: my $Incorrect = 0;
772: my $Override = 0;
773: my $StdNo = 0;
774: my @StdLst;
775: while ( $PrOrd == $lpr[$i] )
776: {
777: $nIdx++;
778: $StdNo++;
779: $StdLst[ $StdNo ] = $Tries;
780: $TotalTries += $Tries;
781: if ( $MxTries < $Tries ) { $MxTries = $Tries; }
782: if ( $Code eq 'C' ){ $YES++; }
783: elsif( $Code eq 'I' ) { $Incorrect++; }
784: elsif( $Code eq 'O' ) { $Override++; }
785: elsif( $Code eq 'U' ) { $StdNo--; }
786: ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\&/,$list[$nIdx]);
787: }
788:
789: $p_count++;
790: my $Dummy;
791: ($ResId,$Dummy)=split(/\*/,$Temp);
792:
793: $Temp = '<a href="'.$hash{'src_'.$ResId}.
794: '" target="_blank">'.$hash{'title_'.$ResId}.$Dummy.'</a>';
795:
796: my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});
797: my $urlres=$res;
798:
799: $ResId=~/(\d+)\.(\d+)/;
800: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
801: $urlres=$Map;
802:
803: $res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';
804: #$Map = '<a href="'.$Map.'">'.$res.'</a>';
805:
806: #------------------------ Compute the Average of Tries about one problem
807: my $Average = ($StdNo) ? $TotalTries/$StdNo : 0;
808:
809: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time;
810: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo;
811: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average;
812:
813: #-------------------------------- Compute percentage of Wrong tries
814: my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0;
815:
816: #-------------------------------- Compute Standard Deviation
817: my $StdDev = 0;
818: if ( $StdNo > 1 ) {
819: for ( my $n = 0; $n < $StdNo; $n++ ) {
820: my $Dif = $StdLst[ $n ]-$Average;
821: $StdDev += $Dif*$Dif;
822: }
823: $StdDev /= ( $StdNo - 1 );
824: $StdDev = sqrt( $StdDev );
825: }
826:
827: #-------------------------------- Compute Degree of Difficulty
828: my $DoDiff = 0;
829: if( $TotalTries > 0 ) {
830: $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries );
831: # $DoDiff = ($TotalTries)/($YES + $Override+ 0.1);
832: }
833:
834: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff;
835:
836: #-------------------------------- Compute the Skewness
837: my $Skewness = 0;
838: my $Sum = 0;
839: if ( $StdNo > 0 && $StdDev > 0 ) {
840: for ( my $n = 0; $n < $StdNo; $n++ ) {
841: my $Dif = $StdLst[ $n ]-$Average;
842: $Skewness += $Dif*$Dif*$Dif;
843: }
844: $Skewness /= $StdNo;
845: $Skewness /= $StdDev*$StdDev*$StdDev;
846: }
847:
848: #--------------------- Compute the Discrimination Factors
849: my ($Up1,$Up2)=split(/\:/,$DisUp{$lpr[$i]});
850: my ($Lw1,$Lw2)=split(/\:/,$DisLow{$lpr[$i]});
851: my $Dis1 = $Up1 - $Lw1;
852: my $Dis2 = $Up2 - $Lw2;
853: my $_D1 = sprintf("%.2f", $Dis1);
854: my $_D2 = sprintf("%.2f", $Dis2);
855:
856: #----------------- Some restition in presenting the float numbers
857: my $Avg = sprintf( "%.2f", $Average );
858: my $Wrng = sprintf( "%.1f", $Wrong );
859: my $SD = sprintf( "%.1f", $StdDev );
860: my $DoD = sprintf( "%.2f", $DoDiff );
861: my $Sk = sprintf( "%.1f", $Skewness );
862: my $join = $PrOrd.'&'.$Temp.'&'.$StdNo.'&'.
863: $TotalTries.'&'.$MxTries.'&'.$Avg.'&'.
864: $YES.'&'.$Override.'&'.$Wrng.'&'.$DoD.'&'.
865: $SD.'&'.$Sk.'&'.$_D1.'&'.$_D2.'&'.$Prob;
866: $CachData{($p_count-1)}=$join;
867:
868: $urlres=~/^(\w+)\/(\w+)/;
869: if ($StdNo) {
870: &Apache::lonnet::put('resevaldata',\%storestats,$1,$2);
871: }
872: #-------------------------------- Row of statistical table
873: if ( $DiscFlag == 0 ) {
874: &TableRow($join,$i,($p_count-1));
875: }
876: }
877: &CloseTable();
878: }
879: #--------------------- close Progress Line
880: $r->print('<script>popwin.close()</script>');
881: $r->rflush();
882: }
883:
884: sub Cache_Statistics {
885: my @list = ();
886: my $Useful;
887: my $UnUseful;
888: my %myHeader = reverse( %Header );
889: $Pos = $myHeader{$ENV{'form.sort'}};
890: if ($Pos > 0) {$Pos++;}
891: $p_count = 0;
892: foreach my $key( keys %CachData) {
893: my @Temp=split(/\&/,$CachData{$key});
894: if ( $Pos == 0 ) {
895: ($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]);
896: }
897: else {
898: $Useful = $Temp[$Pos];
899: }
900: $list[$p_count]=$Useful.'@'.$CachData{$key};
901: $p_count++;
902: }
903:
904: @list = sort MySort (@list);
905:
906: my $nIdx=0;
907:
908: if ( $Pos == 0 ) {
909: foreach (sort keys %mapsort) {
910: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
911: &CreateTable(1,$Hid);
912: my @lpr=split(/\&/,$pr);
913: for (my $i=1; $i<=$#lpr; $i++) {
914: my($Pre, $Post) = split(/\@/,$list[$nIdx]);
915: #$r->print('<br>'.$Pre.'---'.$Post);
916: &TableRow($Post,$i,$nIdx);
917: $nIdx++;
918: }
919: &CloseTable();
920: }
921: }
922: else {
923: &CreateTable(0);
924: for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {
925: my($Pre, $Post) = split(/\@/,$list[$nIdx]);
926: &TableRow($Post,$nIdx,$nIdx);
927: }
928: &CloseTable();
929: }
930: }
931:
932: sub TableRow {
933: my ($Str,$Idx,$RealIdx)=@_;
934: my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override,
935: $Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$Prob)=split(/\&/,$Str);
936: my $Ptr = "\n".'<tr>'.
937: "\n".'<td>'.($RealIdx+1).'</td>'.
938: # "\n".'<td>'.$PrOrd.$Temp.'</td>'.
939: "\n".'<td>'.$Temp.'</td>'.
940: "\n".'<td bgcolor="#EEFFCC"> '.$StdNo.'</td>'.
941: "\n".'<td bgcolor="#EEFFCC">'.$TotalTries.'</td>'.
942: "\n".'<td bgcolor="#EEFFCC">'.$MxTries.'</td>'.
943: "\n".'<td bgcolor="#DDFFFF">'.$Avg.'</td>'.
944: "\n".'<td bgcolor="#DDFFFF"> '.$YES.'</td>'.
945: "\n".'<td bgcolor="#DDFFFF"> '.$Override.'</td>'.
946: "\n".'<td bgcolor="#FFDDDD"> '.$Wrng.'</td>'.
947: "\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
948: "\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
949: "\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
950: "\n".'<td bgcolor="#FFDDFF"> '.$_D1.'</td>'.
951: "\n".'<td bgcolor="#FFDDFF"> '.$_D2.'</td>';
952: # if( $OpResp{$PrOrd} ) {
953: # $Ptr.='<td>'.'<input type="submit" name="OpResp" value="'."View_$PrOrd".'" />'.'</td>';
954: # }
955: # else {
956: # $Ptr.='<td> -------- </td>';
957: # }
958: $r->print("\n".$Ptr.'</tr>' );
959: $GraphDat{$RealIdx}=$DoD.':'.$Wrng;
960: }
961:
962: # ------------------------------------------- Prepare data for Graphical chart
963:
964: sub GetGraphData {
965: my $Tag = shift;
966: my $Col;
967: my $data='';
968: my $count = 0;
969: my $Max = 0;
970: my $cid=$ENV{'request.course.id'};
971: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
972: "_$ENV{'user.domain'}_$cid\_graph.db";
973: foreach (keys %GraphDat) {delete $GraphDat{$_};}
974: if (-e "$GraphDB") {
975: if (tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) {
976: if ( $Tag eq 'DoDiff Graph' ) {
977: $Tag = 'Degree-of-Difficulty';
978: $Col = 0;
979: }
980: else {
981: $Tag = 'Wrong-Percentage';
982: $Col = 1;
983: }
984: foreach (sort NumericSort keys %GraphDat) {
985: my @Temp=split(/\:/,$GraphDat{$_});
986: my $inf = $Temp[$Col];
987: if ( $Max < $inf ) {$Max = $inf;}
988: $data .= $inf.',';
989: $count++;
990: }
991: untie(%GraphDat);
992: my $Course = $ENV{'course.'.$cid.'.description'};
993: $Course =~ s/\ /"_"/eg;
994: $GData=$Course.'&'.$Tag.'&'.$Max.'&'.$count.'&'.$data;
995:
996: }
997: else {
998: $r->print("Unable to tie hash to db file");
999: }
1000: }
1001: }
1002:
1003:
1004: sub initial {
1005: # --------------------------------- Initialize the global varaibles
1006: undef @students;
1007: undef @cols;
1008: undef %maps;
1009: undef %section;
1010: undef %StuBox;
1011: undef @list;
1012: undef %CachData;
1013: undef %GraphDat;
1014: undef %DiscFac;
1015: undef %OpResp;
1016: undef $CurMap;
1017: undef $CurSec;
1018: undef $CurStu;
1019: undef $p_count;
1020: undef $Pos;
1021: undef $GData;
1022: $DiscFlag=0;
1023: $P_Order=100000;
1024: $HWN=$P_Order;
1025: }
1026:
1027:
1028: sub ClassList {
1029:
1030: &GetStatus();
1031:
1032: $cid=$ENV{'request.course.id'};
1033: my $chome=$ENV{'course.'.$cid.'.home'};
1034: my ($cdom,$cnum)=split(/\_/,$cid);
1035: # ----------------------- Get first and last resource, see if there is anything
1036: $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
1037: $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
1038: if (($firstres) && ($lastres)) {
1039: # ----------------------------------------------------------------- Render page
1040: my $classlst=&Apache::lonnet::reply
1041: ('dump:'.$cdom.':'.$cnum.':classlist',$chome);
1042: my $StudNo = 0;
1043: my $now=time;
1044: unless ($classlst=~/^error\:/) {
1045: foreach (sort split(/\&/,$classlst)) {
1046: my ($name,$value)=split(/\=/,$_);
1047: my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
1048: $name=&Apache::lonnet::unescape($name);
1049: my ($sname,$sdom)=split(/\:/,$name);
1050: my $active=1;
1051: my $Status=$ENV{'form.status'};
1052: $Status = ($Status) ? $Status : 'Active';
1053: if ( ( ($end) && $now > $end ) &&
1054: ( ($Status eq 'Active') ) ) { $active=0; }
1055: if ( ($Status eq 'Expired') &&
1056: ($end == 0 || $now < $end) ) { $active=0; }
1057: if ($active) {
1058: my $thisindex=$#students+1;
1059: $name=&Apache::lonnet::unescape($name);
1060: $students[$thisindex]=$name;
1061: my ($sname,$sdom)=split(/\:/,$name);
1062: #my %reply=&Apache::lonnet::idrget($sdom,$sname);
1063: #my $reply=&Apache::lonnet::reply('get:'.$sdom.':'.$sname.
1064: # ':environment:lastname&generation&firstname&middlename',
1065: # &Apache::lonnet::homeserver($sname,$sdom));
1066: my $ssec=&usection($sdom,$sname,$cid,$Status);
1067: if ($ssec==-1) {next;}
1068: $ssec=($ssec) ? $ssec : '(none)';
1069: #$ssec=(int($ssec)) ? int($ssec) : $ssec;
1070: $section{$ssec}=$ssec;
1071: if ($CurSec eq 'All Sections' || $ssec eq $CurSec) {
1072: $students[$StudNo]=$name;
1073: $StuBox{$sname}=$sdom;
1074: }
1075: $StudNo++;
1076: }
1077: }
1078: }
1079: else {
1080: $r->print('<h1>Could not access course data</h1>');
1081: }
1082: $r->print("Total number of students : ".($#students+1));
1083: $r->rflush();
1084: # --------------- Find all assessments and put them into some linear-like order
1085: &tracetable($firstres,'&'.$lastres.'&');
1086: # my $c=0;
1087: # foreach (sort keys %mapsort) {
1088: # $r->print('<br>'.$c.')'.$_.' ... '.$mapsort{$_});
1089: # $c++;
1090: # }
1091: }
1092:
1093: # ------------------------------------------------------------- End render page
1094: else {
1095: $r->print('<h3>Undefined course sequence</h3>');
1096: }
1097: &MapSecOptions();
1098: }
1099:
1100:
1101: sub Menu {
1102: my $InpStr = $ENV{'form.sort'};
1103: if ( $InpStr eq 'DoDiff Graph' || $InpStr eq '%Wrong Graph' ) {
1104: &GetGraphData($InpStr);
1105: $r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />');
1106: }
1107: else {
1108: $r->print('<html><head><title>LON-CAPA Statistics</title></head>');
1109:
1110:
1111: $r->print('<body bgcolor="#FFFFFF">'.
1112: '<script>window.focus(); window.width=500;window.height=500; </script>'.
1113: '<img align=right src=/adm/lonIcons/lonlogos.gif>');
1114: # ---------------------------------------------------------------- Course title
1115: $r->print('<h1> Course : "'.
1116: $ENV{'course.'.$ENV{'request.course.id'}.
1117: '.description'}.'"</h1><h2>'.localtime().'</h2>');
1118: # ------------------------------- This is going to take a while, produce output
1119: $r->rflush();
1120:
1121: $r->print("\n".'<form name=stat method=post action="/adm/statistics" >');
1122:
1123: my $content = $ENV{'form.sort'};
1124: if ($content eq '' || $content eq 'Return to Menu') {
1125: my $Ptr = '<h3>';
1126: $Ptr .= '<input type=submit name=sort value="Problem Evaluation"/>';
1127: $Ptr .= '<br><br>';
1128: $Ptr .= '<input type=submit name=sort value="Student Assessment"/>';
1129: $Ptr .= '</h3>';
1130: $r->print( $Ptr );
1131: }
1132: else {
1133: &initial();
1134: &ClassList();
1135: if ( $content eq 'Student Assessment' ||
1136: $content eq 'Create Student Report' ) {
1137: &StudentOptions();
1138: &StudentReport($CurStu,$StuBox{"$CurStu"});
1139: }
1140: else {
1141: &PreStatTable();
1142: }
1143: }
1144: $r->print("\n".'</form>'.
1145: "\n".'</body>'.
1146: "\n".'</html>');
1147: $r->rflush();
1148: }
1149: }
1150:
1151: sub StudentOptions {
1152: my $OpSel5='';
1153: $CurStu = $ENV{'form.student'};
1154: if ( $CurStu eq '' ) {
1155: $CurStu = 'All Students';
1156: $OpSel5 = 'selected';
1157: }
1158: my $Ptr ='';
1159: # ----------------------------------- Loading the Students Combobox
1160: $Ptr .= '<br><b>Select Student</b>'."\n".
1161: '<select name="student">'."\n".
1162: '<option '.$OpSel5.'>All Students</option>';
1163: foreach my $key ( sort keys %StuBox ) {
1164: $Ptr .= '<option';
1165: if ($CurStu eq $key) {$Ptr .= ' selected';}
1166: $Ptr .= '>'.$key."</option>\n";
1167: }
1168: $Ptr .= '</select>';
1169: $Ptr .= '<br><input type="submit" name="sort" value="Create Student Report" />';
1170: $r->print( $Ptr );
1171: $r->rflush();
1172: }
1173:
1174: sub GetStatus {
1175: $OpSel1='';
1176: $OpSel2='';
1177: $OpSel3='';
1178: $OpSel4='';
1179:
1180: if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
1181: else { $OpSel1 = 'selected'; }
1182:
1183: my %myHeader = reverse( %Header );
1184: $Pos = $myHeader{$ENV{'form.sort'}};
1185: if ($Pos == 0) {
1186: $OpSel1 = 'selected';
1187: $ENV{'form.order'}='Ascendig';
1188: }
1189:
1190: $CurMap = $ENV{'form.maps'};
1191: if ( $CurMap eq '' ) {
1192: $CurMap = 'All Maps';
1193: $OpSel3 = 'selected';
1194: }
1195: $CurSec = $ENV{'form.section'};
1196: if ( $CurSec eq '' ) {
1197: $CurSec = 'All Sections';
1198: $OpSel4 = 'selected';
1199: }
1200: }
1201:
1202:
1203: sub MapSecOptions {
1204: # ----------------------------------- Loading the Maps Combobox
1205: my $Ptr = '<br>';
1206: $Ptr .= '<br><input type="submit" name="sort" value="Return to Menu" />';
1207: $Ptr .= '<br><b> Select Map </b>'."\n".
1208: '<select name="maps">'."\n".
1209: '<option '.$OpSel3.'>All Maps</option>';
1210: foreach my $key ( sort keys %maps ) {
1211: $Ptr .= '<option';
1212: if ($CurMap eq $key) {$Ptr .= ' selected';}
1213: $Ptr .= '>'.$key."</option>\n";
1214: }
1215: $Ptr .= '</select>';
1216: $Ptr .= ' ';
1217:
1218: # ----------------------------------- Loading the Sections Combobox
1219: $Ptr .= '<br><b>Select Section</b>'."\n".
1220: '<select name="section">'."\n".
1221: '<option '.$OpSel4.'>All Sections</option>';
1222: foreach my $key ( sort keys %section ) {
1223: $Ptr .= '<option';
1224: if ($CurSec eq $key) {$Ptr .= ' selected';}
1225: $Ptr .= '>'.$key."</option>"."\n";
1226: }
1227: $Ptr .= '</select>'."\n";
1228:
1229: $r->print( $Ptr );
1230: $r->rflush();
1231: }
1232:
1233:
1234: # ================================================================ Main Handler
1235:
1236: sub handler {
1237: $r=shift;
1238:
1239: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
1240: # ------------------------------------------- Set document type for header only
1241: if ($r->header_only) {
1242: if ($ENV{'browser.mathml'}) {
1243: $r->content_type('text/xml');
1244: }
1245: else {
1246: $r->content_type('text/html');
1247: }
1248: $r->send_http_header;
1249: return OK;
1250: }
1251: my $requrl=$r->uri;
1252: # ----------------------------------------------------------------- Tie db file
1253:
1254: undef %hash;
1255:
1256: if ($ENV{'request.course.fn'}) {
1257: my $fn=$ENV{'request.course.fn'};
1258: if (-e "$fn.db") {
1259: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
1260: # ------------------------------------------------------------------- Hash tied
1261: $r->content_type('text/html');
1262: $r->send_http_header;
1263: &Menu();
1264: }
1265: else {
1266: $r->content_type('text/html');
1267: $r->send_http_header;
1268: $r->print('<html><body>Coursemap undefined.</body></html>');
1269: }
1270: # ------------------------------------------------------------------ Untie hash
1271: unless (untie(%hash)) {
1272: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1273: "Could not untie coursemap $fn (browse).</font>");
1274: }
1275:
1276: # -------------------------------------------------------------------- All done
1277: return OK;
1278: # ----------------------------------------------- Errors, hash could no be tied
1279: }
1280: }
1281: else {
1282: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
1283: return HTTP_NOT_ACCEPTABLE;
1284: }
1285: }
1286: else {
1287: $ENV{'user.error.msg'}=
1288: $r->uri.":vgr:0:0:Cannot view grades for complete course";
1289:
1290: return HTTP_NOT_ACCEPTABLE;
1291: }
1292: }
1293: 1;
1294: __END__
1295:
1296:
1297:
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