Annotation of loncom/interface/lonstatistics.pm, revision 1.5
1.1 albertel 1: # The LearningOnline Network with CAPA
2: # (Publication Handler
3: #
1.5 ! minaeibi 4: # $Id: lonstatistics.pm,v 1.4 2002/02/06 16:59:01 minaeibi Exp $
1.1 albertel 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
1.5 ! minaeibi 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
1.1 albertel 32: # YEAR=2002
1.5 ! minaeibi 33: # 1/22, 2/1, 2/6, 2/25 Behrouz Minaei
1.1 albertel 34: ###
35:
1.3 minaeibi 36: package Apache::lonstatistics;
1.1 albertel 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;
1.3 minaeibi 44: #use Benchmark;
1.1 albertel 45:
46: # -------------------------------------------------------------- Module Globals
47: my %hash;
48: my %CachData;
49: my %GraphDat;
50: my %maps;
1.5 ! minaeibi 51: my %mapsort;
1.1 albertel 52: my %section;
53: my %StuBox;
54: my %DiscFac;
55: my $CurMap;
56: my $CurSec;
57: my $CurStu;
58: my @cols;
59: my @list;
60: my @students;
61: my $p_count;
62: my $Pos;
63: my $r;
64: my $OpSel1;
65: my $OpSel2;
66: my $OpSelDis1;
67: my $OpSelDis2;
68: my $CurDis=0;
69: my $OpSel3;
70: my $OpSel4;
71: my $GData;
72: my $cid;
73: my $firstres;
74: my $lastres;
1.5 ! minaeibi 75: my $DiscFlag;
! 76: my $HWN;
! 77: my $P_Order;
! 78: my %Header = (0,"Homework Problems",1,"#Stdnts",2,"Tries",3,"Mod",
! 79: 4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff",
! 80: 9,"S.D.",10,"Skew.",11,"Map");
! 81: # 11,"Dis.F.",12,"Resourse URL");
1.1 albertel 82:
83: sub NumericSort {
84: $a <=> $b;
85: }
86:
87: # ------ Create different Student Report
88: sub StudentReport {
89: my ($sname,$sdom)=@_;
90: if ( $sname eq 'All Students' ) {
91: $r->print( '<h3><font color=blue>WARNING:
92: Please select a student</font></h3>' );
93: return;
94: }
95: my $shome=&Apache::lonnet::homeserver( $sname,$sdom );
96: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );
97: my %result = ();
98: my $ResId;
1.5 ! minaeibi 99: my $PrOrd;
1.1 albertel 100: my $Code;
101: my $Tries;
102: my $TotalTries = 0;
103: my $ParCr = 0;
104: my $Wrongs;
105: my %TempHash;
106: my $Version;
107: my $LatestVersion;
108: my $PtrTry='';
109: my $PtrCod='';
110: my $SetNo=0;
111: my $Str = "\n".'<table border=2>'.
112: "\n".'<tr>'.
113: "\n".'<th> # </th>'.
114: "\n".'<th> Set Title </th>'.
115: "\n".'<th> Results </th>'.
116: "\n".'<th> Tries </th>'.
117: "\n".'</tr>';
118: unless ($reply=~/^error\:/) {
1.5 ! minaeibi 119: foreach (split(/\&/,$reply)){
1.1 albertel 120: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
121: $result{$name}=$value;
1.5 ! minaeibi 122: }
! 123: foreach my $CurCol (@cols) {
! 124: if (!$CurCol){
1.1 albertel 125: my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});
126: if ( $Set ) {
127: $SetNo++;
128: $Str .= "\n"."<tr>".
129: "\n"."<td> $SetNo </td>".
130: "\n"."<td> $Set </td>".
131: "\n"."<td> $PtrCod </td>".
132: "\n"."<td> $PtrTry</td>".
133: "\n"."</tr>";
134: }
135: $PtrTry='';
136: $PtrCod='';
137: next;
138: }
1.5 ! minaeibi 139: ($PrOrd,$ResId)=split(/\:/,$CurCol);
1.1 albertel 140: $ResId=~/(\d+)\.(\d+)/;
141: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
142: if ( $CurMap ne 'All Maps' ) {
143: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
144: if ( $Map ne $ResMap ) { next; }
145: }
146: my $meta=$hash{'src_'.$ResId};
147: my $PartNo = 0;
148: undef %TempHash;
1.5 ! minaeibi 149: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))){
1.1 albertel 150: if ($_=~/^stores\_(\d+)\_tries$/) {
151: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
152: if ( $TempHash{"$Part"} eq '' ) {
153: $TempHash{"$Part"} = $Part;
154: $TempHash{$PartNo}=$Part;
155: $TempHash{"$Part.Code"} = '-';
1.5 ! minaeibi 156: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
1.1 albertel 157: $PartNo++;
158: }
159: }
1.5 ! minaeibi 160: }
1.1 albertel 161:
162: my $Prob = $Map.'___'.$2.'___'.
163: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
164: $Code='U';
165: $Tries = 0;
166: $Wrongs = 0;
167: $LatestVersion = $result{"version:$Prob"};
168:
169: if ( $LatestVersion ) {
170: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
171: my $vkeys = $result{"$Version:keys:$Prob"};
172: my @keys = split(/\:/,$vkeys);
173:
174: foreach my $Key (@keys) {
175: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
176: my $Part = $1;
177: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
178: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
179: $TotalTries += $Tries;
180: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
181: if ( $Val eq 'correct_by_student' )
182: { $Wrongs = $Tries - 1; $Code = 'Y'; }
183: elsif ( $Val eq 'correct_by_override' )
184: { $Wrongs = $Tries - 1; $Code = 'y'; }
185: elsif ( $Val eq 'incorrect_attempted' ||
186: $Val eq 'incorrect_by_override' )
187: { $Wrongs = $Tries; $Code = 'N'; }
188: $TempHash{"$Part.Code"} = $Code;
189: $TempHash{"$Part.Wrongs"} = $Wrongs;
190: }
191: }
192: }
193: for ( my $n = 0; $n < $PartNo; $n++ ) {
194: my $part = $TempHash{$n};
195: if ($PtrTry ne '') {$PtrTry .= ',';}
196: $PtrTry .= "$TempHash{$part.'.Tries'}";
197: $PtrCod .= "$TempHash{$part.'.Code'}";
198: }
199: }
200: else {
201: for(my $n=0; $n<$PartNo; $n++) {
202: if ($PtrTry ne '') {$PtrTry .= ',';}
203: $PtrTry .= "0";
204: $PtrCod .= "-";
205: }
206: }
207: }
208: }
209: $Str .= "\n".'</table>';
210: $r->print($Str);
211: $r->rflush();
212: }
213:
1.5 ! minaeibi 214: sub CreateTable {
! 215: my ($Hd, $Hid)=@_;
! 216: if ( $Hd == 1 ) {
! 217: # $Hid=~/(\d+)\.(\d+)/;
! 218: $r->print('<br><a href="'.$hash{'src_'.$Hid}.
! 219: '" target="_blank">'.$hash{'title_'.$Hid}.'</a>'
! 220: # .' ('.&Apache::lonnet::declutter($hash{'map_id_'.$1}).')'
! 221: );
! 222: }
! 223: my $Result = "\n".'<table border=2>';
! 224: $Result .= '<tr><th>P#</th>'."\n";
! 225: for ( my $nIdx=0; $nIdx < 11; $nIdx++ ) {
! 226: $Result .= '<th>'.'<input type="submit" name="sort" value="'.
! 227: $Header{$nIdx}.'" />'.'</th>'."\n";
! 228: }
! 229: $Result .= "\n".'</tr>'."\n";
! 230: $r->print( $Result );
! 231: $r->rflush();
! 232: }
1.1 albertel 233:
1.5 ! minaeibi 234: sub CloseTable {
! 235: $r->print("\n".'</table>'."\n");
! 236: $r->rflush();
! 237: }
! 238:
1.1 albertel 239: # ------------------------------------------- Prepare Statistics Table
240: sub PreStatTable {
241: my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
242: "_$ENV{'user.domain'}_$cid\_statistics.db";
243: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
244: "_$ENV{'user.domain'}_$cid\_graph.db";
245: my $CachDisFac = "/home/httpd/perl/tmp/$ENV{'user.name'}".
246: "_$ENV{'user.domain'}_$cid\_DiscFactor.db";
247: $r->print('<br><input type="submit" name="sort" value="Recalculate Statistics" />');
248:
249: my $Ptr = '';
250:
251: $Ptr .= '<br><b> Sorting Type: </b>'."\n".
252: '<select name="order"> <option '.$OpSel1.' >Ascending</option>'."\n".
253: '<option '.$OpSel2.'>Descending</option> </select> '."\n";
254: $Ptr .= ' ';
255: $Ptr .= '<input type="submit" name="sort" value="DoDiff Graph" />'."\n";
256: $Ptr .= ' ';
257: $Ptr .= '<input type="submit" name="sort" value="%Wrong Graph" />'."\n";
258:
259: $Ptr .= '<pre>'.
260: ' #Stdnts: Total Number of Students opened the problem.<br>'.
261: ' Tries : Total Number of Tries for solving the problem.<br>'.
262: ' Mod : Maximunm Number of Tries for solving the problem.<br>'.
1.5 ! minaeibi 263: ' Mean : Average Number of the tries. [ Tries / #Stdnts ]<br>'.
1.1 albertel 264: ' #YES : Number of students solved the problem correctly.<br>'.
265: ' #yes : Number of students solved the problem by override.<br>'.
1.2 minaeibi 266: ' %Wrng : Percentage of students tried to solve the problem but'.
267: ' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
1.5 ! minaeibi 268: # ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'.
! 269: ' DoDiff : Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'.
1.2 minaeibi 270: ' S.D. : Standard Deviation of the tries.'.
271: '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
1.5 ! minaeibi 272: ' where Xi denotes every student\'s tries ]<br>'.
1.2 minaeibi 273: ' Skew. : Skewness of the students tries.'.
274: ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
1.5 ! minaeibi 275:
1.1 albertel 276: # ' Dis.F. : Discrimination Factor. [ Sum of Partial Credits Awarded / Total Number of Tries in %27 upper and lower students]</b>'.
277: '</pre>';
278:
279: $r->print($Ptr);
280: $r->rflush();
281:
282: if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {
283: if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {
284: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
285: &Cache_Statistics();
286: }
287: else {
288: $r->print("Unable to tie hash to db file");
289: }
290: }
291: else {
292: if (tie(%CachData,'GDBM_File',$CacheDB,&GDBM_WRCREAT,0640)) {
293: tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_WRCREAT,0640);
294: tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
295: foreach (keys %DiscFac) {delete $CachData{$_};}
296: foreach (keys %CachData) {delete $CachData{$_};}
297: $DiscFlag=0;
298: &Build_Statistics();
299: }
300: else {
301: $r->print("Unable to tie hash to db file");
302: }
303: }
304: #$r->print('Total instances of the problems : '.($p_count*($#students+1)));
305:
306: untie(%CachData);
307: untie(%GraphDat);
1.5 ! minaeibi 308: untie(%DiscFac);
1.1 albertel 309: }
310:
311:
312: # ------------------------------------- Find the section of student in a course
313:
314: sub usection {
315: my ($udom,$unam,$courseid)=@_;
316: $courseid=~s/\_/\//g;
317: $courseid=~s/^(\w)/\/$1/;
318: map {
319: my ($key,$value)=split(/\=/,$_);
320: $key=&Apache::lonnet::unescape($key);
321: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
322: my $section=$1;
323: if ($key eq $courseid.'_st') { $section=''; }
324: my ($dummy,$end,$start)=split(/\_/,&Apache::lonnet::unescape($value));
325: $section=($section) ? $section : '(none)';
1.4 minaeibi 326: # $section=(int($section)) ? int($section) : $section;
1.1 albertel 327: # $r->print($unam.'...'.$section.'<br>');
328: return $section;
329: }
330: } split(/\&/,&Apache::lonnet::reply('dump:'.$udom.':'.$unam.':roles',
331: &Apache::lonnet::homeserver($unam,$udom)));
332: return '';
333: }
334:
335:
336: # ------ Dump the Student's DB file and handling the data for statistics table
337:
338: sub ExtractStudentData {
339: my ($student,$coid)=@_;
340: my ($sname,$sdom) = split( /\:/, $student );
341: my $shome=&Apache::lonnet::homeserver( $sname,$sdom );
342: my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );
343: my %result = ();
344: my $ResId;
1.5 ! minaeibi 345: my $PrOrd;
1.1 albertel 346: my $Dis = '';
347: my $Code;
348: my $Tries;
349: my $ParCr;
350: my $TotalTries = 0;
351: my $TotalOpend = 0;
352: my $ProbSolved = 0;
353: my $ProbTot = 0;
354: my $TimeTot = 0;
355: my $TotParCr = 0;
356: my $Wrongs;
357: my %TempHash;
358: my $Version;
359: my $LatestVersion;
360: my $SecLimit;
361: my $MapLimit;
362: unless ($reply=~/^error\:/) {
1.5 ! minaeibi 363: foreach (split(/\&/,$reply)) {
1.1 albertel 364: my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
365: $result{$name}=$value;
1.5 ! minaeibi 366: }
! 367: foreach my $CurCol(@cols) {
! 368: ($PrOrd,$ResId)=split(/\:/,$CurCol);
! 369: if ( !$CurCol ) { next; }
1.1 albertel 370: $ResId=~/(\d+)\.(\d+)/;
1.5 ! minaeibi 371: my $MapId=$1;
! 372: my $PrbId=$2;
! 373: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$MapId} );
1.1 albertel 374: if ( $CurMap ne 'All Maps' ) {
375: my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
376: if ( $Map ne $ResMap ) { next; }
377: }
378: my $meta=$hash{'src_'.$ResId};
379: my $PartNo = 0;
380: $Dis .= ':';
381: undef %TempHash;
1.5 ! minaeibi 382: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
1.1 albertel 383: if ($_=~/^stores\_(\d+)\_tries$/) {
384: my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
385: if ( $TempHash{"$Part"} eq '' ) {
386: $TempHash{"$Part"} = $Part;
387: $TempHash{$PartNo}=$Part;
388: $TempHash{"$Part.Code"} = 'U';
1.5 ! minaeibi 389: $TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
1.1 albertel 390: $PartNo++;
391: }
392: }
1.5 ! minaeibi 393: }
1.1 albertel 394:
1.5 ! minaeibi 395: my $Prob = $Map.'___'.$PrbId.'___'.
1.1 albertel 396: &Apache::lonnet::declutter( $hash{'src_'.$ResId} );
397: $Code='U';
398: $Tries = 0;
399: $ParCr = 0;
400: $Wrongs = 0;
401: $LatestVersion = $result{"version:$Prob"};
402:
403: if ( $LatestVersion ) {
404: for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
405: my $vkeys = $result{"$Version:keys:$Prob"};
406: my @keys = split(/\:/,$vkeys);
407:
408: foreach my $Key (@keys) {
409: if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
410: my $Part = $1;
411: $Tries = $result{"$Version:$Prob:resource.$Part.tries"};
412: $ParCr = $result{"$Version:$Prob:resource.$Part.awarded"};
413: my $Time = $result{"$Version:$Prob:timestamp"};
414: $TempHash{"$Part.Time"} = ($Time) ? $Time : 0;
415: $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
416: $TempHash{"$Part.ParCr"} = ($ParCr) ? $ParCr : 0;
417: $TotalTries += $TempHash{"$Part.Tries"};
418: $TotParCr += $TempHash{"$Part.ParCr"};
419: #$r->print($Version.'---'.$Prob.'==='.$Time.'<br>');
420: my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
421: if ( $Val eq 'correct_by_student' )
422: { $Wrongs = $Tries - 1; $Code = 'C'; }
423: elsif ( $Val eq 'correct_by_override' )
424: { $Wrongs = $Tries - 1; $Code = 'O'; }
425: elsif ( $Val eq 'incorrect_attempted' ||
426: $Val eq 'incorrect_by_override' )
427: { $Wrongs = $Tries; $Code = 'I'; }
428: $TempHash{"$Part.Code"} = $Code;
429: $TempHash{"$Part.Wrongs"} = $Wrongs;
430: }
431: }
432: }
433: for ( my $n = 0; $n < $PartNo; $n++ ) {
434: my $part = $TempHash{$n};
435: my $Yes = 0;
436: if ( $TempHash{$part.'.Code'} eq 'C' ||
437: $TempHash{$part.'.Code'} eq 'O' )
438: {$ProbSolved++;$Yes=1;}
1.5 ! minaeibi 439: # my $ptr = "$hash{'title_'.$ResId}";
! 440: my $ptr = $TempHash{$part.'.PrOrd'}.':'.$ResId;
1.1 albertel 441: if ( $PartNo > 1 ) {
1.5 ! minaeibi 442: $ptr .= "*(part $part)";
1.1 albertel 443: $Dis .= ':';
444: }
445: my $Fac = ($TempHash{"$part.Tries"}) ?
446: ($TempHash{"$part.ParCr"}/$TempHash{"$part.Tries"}) : 0;
447: my $DisF;
448: if ( $Fac > 0 && $Fac < 1 ) {
449: $DisF = sprintf( "%.4f", $Fac );
450: }
451: else {$DisF = $Fac;}
452: # $DisF .= '+'.$TempHash{"$part.Time"};
453: $TimeTot += $TempHash{"$part.Time"};
454: $Dis .= $ptr.'*'.$ResId.'='.$DisF.'+'.$Yes;
1.5 ! minaeibi 455: $ptr .= ":$TempHash{$part.'.Tries'}".
1.1 albertel 456: ":$TempHash{$part.'.Wrongs'}".
1.5 ! minaeibi 457: ":$TempHash{$part.'.Code'}";
1.1 albertel 458: push (@list, $ptr);
459: $TotalOpend++;
460: $ProbTot++;
461: }
462: }
1.5 ! minaeibi 463: #else {
! 464: #for(my $n=0; $n<$PartNo; $n++) {
! 465: # push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U");
! 466: # $ProbTot++;
! 467: #}
! 468: #}
1.1 albertel 469: }
470: if ( $TotalTries ) {
471: my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;
472: # my $DisFactor = int(sprintf( "%.4f", $DisFac ) * 100);
473: my $DisFactor = sprintf( "%.4f", $DisFac );
474: my $time;
475: if ($ProbSolved){
1.5 ! minaeibi 476: $time = int(($TimeTot/$ProbSolved)-10000000);
1.1 albertel 477: }
478: $DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.
479: $TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;
480: #$r->print($DisFactor.$sname.'<br> --- Dis= '.$Dis.'<br>');
481: }
482: }
483: #$r->print($sname.' PrCr= '.$TotParCr.' Slvd= '.$ProbSolved.' Tries='.$TotalTries.'<br>');
484: }
485:
486:
487: # ------------------------------------------------------------ Build page table
488: sub tracetable {
489: my ($rid,$beenhere)=@_;
490: $rid=~/(\d+)\.(\d+)/;
491: $maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};
1.5 ! minaeibi 492: #$maps{$HWN}=$hash{'title_'.$rid};
1.1 albertel 493: unless ($beenhere=~/\&$rid\&/) {
494: $beenhere.=$rid.'&';
495: if (defined($hash{'is_map_'.$rid})) {
496: my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};
497: if ( $cmap eq 'sequence' || $cmap eq 'page' ) {
498: $cols[$#cols+1]=0;
1.5 ! minaeibi 499: $P_Order++;
! 500: $HWN=$P_Order;
! 501: $mapsort{$HWN} = $rid.':';
1.1 albertel 502: #$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=
503: # $hash{'title_'.$rid};
504: }
505: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
506: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
1.5 ! minaeibi 507: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
1.1 albertel 508:
1.5 ! minaeibi 509: &tracetable($hash{'map_start_'.$hash{'src_'.$rid}},
! 510: '&'.$frid.'&');
1.1 albertel 511:
1.5 ! minaeibi 512: $cols[$#cols+1]=($P_Order+1).':'.$frid;
! 513:
! 514: my $meta=$hash{'src_'.$frid};
! 515: my $PartNo = 0;
! 516: if ($meta) {
! 517: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
! 518: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
! 519: if ($_=~/^stores\_(\d+)\_tries$/) {
! 520: &Apache::lonnet::metadata($meta,$_.'.part');
! 521: $P_Order++;
! 522: $mapsort{$HWN} .= '&'.$P_Order;
! 523: $PartNo++;
! 524: $r->print('<br>'.$PartNo.'---'.$P_Order);
! 525: }
! 526: }
! 527: }
! 528: }
1.1 albertel 529: }
530: } else {
1.5 ! minaeibi 531: $cols[$#cols+1]=($P_Order+1).':'.$rid;
! 532: my $meta=$hash{'src_'.$rid};
! 533: my $PartNo = 0;
! 534: if ($meta) {
! 535: if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
! 536: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
! 537: if ($_=~/^stores\_(\d+)\_tries$/) {
! 538: &Apache::lonnet::metadata($meta,$_.'.part');
! 539: $P_Order++;
! 540: $mapsort{$HWN} .= '&'.$P_Order;
! 541: $PartNo++;
! 542: }
! 543: }
! 544: }
! 545: }
1.1 albertel 546: }
547: if (defined($hash{'to_'.$rid})) {
1.5 ! minaeibi 548: foreach (split(/\,/,$hash{'to_'.$rid})){
1.1 albertel 549: &tracetable($hash{'goesto_'.$_},$beenhere);
1.5 ! minaeibi 550: }
1.1 albertel 551: }
552: }
553: }
554:
555: sub MySort {
556: if ( $Pos > 0 && $Pos < 11 ) {
557: if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;}
558: else { $a <=> $b; }
559: }
560: else {
561: if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;}
562: else { $a cmp $b; }
563: }
564: }
565:
566: sub Build_Statistics {
567: $r->print(<<ENDPOP);
1.5 ! minaeibi 568: <script>
1.1 albertel 569: popwin=open('','popwin','width=400,height=100');
1.5 ! minaeibi 570: popwin.document.writeln('<html><body bgcolor="#7777EE">'+
1.1 albertel 571: '<title>LON-CAPA Statistics</title>'+
572: '<h4>Computation Progress</h4>'+
573: '<form name=popremain>'+
574: '<input type=text size=35 name=remaining value=Starting></form>'+
575: '</body></html>');
576: popwin.document.close();
1.5 ! minaeibi 577: </script>
1.1 albertel 578: ENDPOP
579:
580: $r->rflush();
581: # ---------------------------- Gathering the Data of students' tries
582: my $index;
583: for ($index=0;$index<=$#students;$index++) {
584: #----------- update progress
585: $r->print('<script>popwin.document.popremain.remaining.value="'.
586: 'Computing '.($index+1).'/'.($#students+1).': '.
587: $students[$index].'";</script>');
588: $r->rflush();
589:
590: &ExtractStudentData($students[$index],$cid);
591: }
592: #--------------------- close Progress Line
593: $r->print('<script>popwin.close()</script>');
594: $r->rflush();
595: # -------------------- sorting the Data
1.5 ! minaeibi 596: @list = sort (@list);
! 597:
1.1 albertel 598: $OpSel2='';
599: $OpSel1='selected';
600:
601: $p_count = 0;
602: my $nIdx = 0;
603: my $dummy;
604: my $p_val;
605: my $ResId;
606: my $NoElements = $#list + 1;
607: #-------------------------------- loop for data representation
1.5 ! minaeibi 608: foreach (sort keys %mapsort) {
! 609: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
! 610: my @lpr=split(/\&/,$pr);
! 611: &CreateTable(1,$Hid);
! 612: for (my $i=1; $i<=$#lpr; $i++) {
! 613: my %storestats=();
! 614: my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
! 615: my $Temp = $Prob;
! 616: my $MxTries = 0;
! 617: my $TotalTries = 0;
! 618: my $YES = 0;
! 619: my $Incorrect = 0;
! 620: my $Override = 0;
! 621: my $StdNo = 0;
! 622: my @StdLst;
! 623: while ( $PrOrd == $lpr[$i] )
! 624: {
! 625: $nIdx++;
! 626: $StdNo++;
! 627: $StdLst[ $StdNo ] = $Tries;
! 628: $TotalTries += $Tries;
! 629: if ( $MxTries < $Tries ) { $MxTries = $Tries; }
! 630: if ( $Code eq 'C' ){ $YES++; }
! 631: elsif( $Code eq 'I' ) { $Incorrect++; }
! 632: elsif( $Code eq 'O' ) { $Override++; }
! 633: elsif( $Code eq 'U' ) { $StdNo--; }
! 634: ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
! 635: }
! 636:
! 637: $p_count++;
! 638: my $Dummy;
! 639: ($ResId,$Dummy)=split(/\*/,$Temp);
1.1 albertel 640:
1.5 ! minaeibi 641: $Temp = '<a href="'.$hash{'src_'.$ResId}.
! 642: '" target="_blank">'.$hash{'title_'.$ResId}.$Dummy.'</a>';
1.1 albertel 643:
1.5 ! minaeibi 644: my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});
! 645: my $urlres=$res;
1.1 albertel 646:
1.5 ! minaeibi 647: $ResId=~/(\d+)\.(\d+)/;
! 648: my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
! 649: $urlres=$Map;
1.1 albertel 650:
1.5 ! minaeibi 651: $res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';
! 652: #$Map = '<a href="'.$Map.'">'.$res.'</a>';
1.1 albertel 653:
654: #------------------------ Compute the Average of Tries about one problem
1.5 ! minaeibi 655: my $Average = ($StdNo) ? $TotalTries/$StdNo : 0;
1.1 albertel 656:
1.5 ! minaeibi 657: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time;
! 658: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo;
! 659: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average;
1.1 albertel 660:
661: #-------------------------------- Compute percentage of Wrong tries
1.5 ! minaeibi 662: my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0;
1.1 albertel 663:
664: #-------------------------------- Compute Standard Deviation
1.5 ! minaeibi 665: my $StdDev = 0;
! 666: if ( $StdNo > 1 ) {
! 667: for ( my $n = 0; $n < $StdNo; $n++ ) {
! 668: my $Dif = $StdLst[ $n ]-$Average;
! 669: $StdDev += $Dif*$Dif;
! 670: }
! 671: $StdDev /= ( $StdNo - 1 );
! 672: $StdDev = sqrt( $StdDev );
! 673: }
1.1 albertel 674:
675: #-------------------------------- Compute Degree of Difficulty
1.5 ! minaeibi 676: my $DoDiff = 0;
! 677: if( $TotalTries > 0 ) {
! 678: $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries );
1.1 albertel 679: # $DoDiff = ($TotalTries)/($YES + $Override+ 0.1);
1.5 ! minaeibi 680: }
1.1 albertel 681:
1.5 ! minaeibi 682: $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff;
1.1 albertel 683:
684: #-------------------------------- Compute the Skewness
1.5 ! minaeibi 685: my $Skewness = 0;
! 686: my $Sum = 0;
! 687: if ( $StdNo > 0 && $StdDev > 0 ) {
! 688: for ( my $n = 0; $n < $StdNo; $n++ ) {
! 689: my $Dif = $StdLst[ $n ]-$Average;
! 690: $Skewness += $Dif*$Dif*$Dif;
! 691: }
! 692: $Skewness /= $StdNo;
1.1 albertel 693: $Skewness /= $StdDev*$StdDev*$StdDev;
1.5 ! minaeibi 694: }
1.1 albertel 695: #----------------- Some restition in presenting the float numbers
1.5 ! minaeibi 696: my $Avg = sprintf( "%.2f", $Average );
! 697: my $Wrng = sprintf( "%.1f", $Wrong );
! 698: my $SD = sprintf( "%.1f", $StdDev );
! 699: my $DoD = sprintf( "%.2f", $DoDiff );
! 700: my $Sk = sprintf( "%.1f", $Skewness );
! 701: my $join = $PrOrd.':'.$Temp.':'.$StdNo.':'.
! 702: $TotalTries.':'.$MxTries.':'.$Avg.':'.
! 703: $YES.':'.$Override.':'.$Wrng.':'.$DoD.':'.
! 704: $SD.':'.$Sk.':'.$Map.':'.$Prob;
! 705: $CachData{($p_count-1)}=$join;
! 706:
! 707: $urlres=~/^(\w+)\/(\w+)/;
! 708: if ($StdNo) {
! 709: &Apache::lonnet::put('resevaldata',\%storestats,$1,$2);
! 710: }
1.1 albertel 711: #-------------------------------- Row of statistical table
1.5 ! minaeibi 712: if ( $DiscFlag == 0 ) {
! 713: &TableRow($join,$i,($p_count-1));
! 714: }
! 715: }
! 716: &CloseTable();
1.1 albertel 717: }
718: }
719:
720: sub Cache_Statistics {
721: my @list = ();
722: my $Useful;
723: my $UnUseful;
724: my %myHeader = reverse( %Header );
725: $Pos = $myHeader{$ENV{'form.sort'}};
1.5 ! minaeibi 726: if ($Pos > 0) {$Pos++;}
1.1 albertel 727: $p_count = 0;
728: foreach my $key( keys %CachData) {
729: my @Temp=split(/\:/,$CachData{$key});
730: if ( $Pos == 0 || $Pos == 11 ) {
731: ($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]);
732: }
733: else {
734: $Useful = $Temp[$Pos];
735: }
736: $list[$p_count]=$Useful.'&'.$CachData{$key};
737: $p_count++;
738: }
739:
740: @list = sort MySort (@list);
741:
1.5 ! minaeibi 742: my $nIdx=0;
! 743:
! 744: if ( $Pos == 0 ) {
! 745: foreach (sort keys %mapsort) {
! 746: my ($Hid,$pr)=split(/\:/,$mapsort{$_});
! 747: &CreateTable(1,$Hid);
! 748: my @lpr=split(/\&/,$pr);
! 749: for (my $i=1; $i<=$#lpr; $i++) {
! 750: my($Pre, $Post) = split(/\&/,$list[$nIdx]);
! 751: &TableRow($Post,$i,$nIdx);
! 752: $nIdx++;
! 753: }
! 754: &CloseTable();
! 755: }
! 756: }
! 757: else {
! 758: &CreateTable(0);
! 759: for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {
! 760: my($Pre, $Post) = split(/\&/,$list[$nIdx]);
! 761: &TableRow($Post,$nIdx,$nIdx);
! 762: }
! 763: &CloseTable();
! 764: }
! 765: }
! 766:
! 767: sub TableRow {
! 768: my ($Str,$Idx,$RealIdx)=@_;
! 769: my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,
! 770: $Override,$Wrng,$DoD,$SD,$Sk,$res,$Prob)=split(/\:/,$Str);
! 771: $r->print( "\n".'<tr>'.
! 772: "\n".'<td>'.($RealIdx+1).'</td>'.
! 773: "\n".'<td bgcolor="#FFFFFF">'.$Temp.'</td>'.
! 774: "\n".'<td bgcolor="#EEFFDD"> '.$StdNo.'</td>'.
! 775: "\n".'<td bgcolor="#EEFFDD">'.$TotalTries.'</td>'.
! 776: "\n".'<td bgcolor="#EEFFDD">'.$MxTries.'</td>'.
! 777: "\n".'<td bgcolor="#DDFFFF">'.$Avg.'</td>'.
! 778: "\n".'<td bgcolor="#DDFFFF"> '.$YES.'</td>'.
! 779: "\n".'<td bgcolor="#DDFFFF"> '.$Override.'</td>'.
! 780: "\n".'<td bgcolor="#FFDDDD"> '.$Wrng.'</td>'.
! 781: "\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
! 782: "\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
! 783: "\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
! 784: # "\n".'<td>'.$res.'</td>'.
1.1 albertel 785: "\n".'</tr>' );
1.5 ! minaeibi 786: $GraphDat{$RealIdx}=$DoD.':'.$Wrng;
1.1 albertel 787: }
788:
789: # ------------------------------------------- Prepare data for Graphical chart
790:
791: sub GetGraphData {
792: my $Tag = shift;
793: my $Col;
794: my $data='';
795: my $count = 0;
796: my $Max = 0;
797: my $cid=$ENV{'request.course.id'};
798: my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
799: "_$ENV{'user.domain'}_$cid\_graph.db";
800: foreach (keys %GraphDat) {delete $GraphDat{$_};}
801: if (-e "$GraphDB") {
802: if (tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) {
803: if ( $Tag eq 'DoDiff Graph' ) {
804: $Tag = 'Degree-of-Difficulty';
805: $Col = 0;
806: }
807: else {
808: $Tag = 'Wrong-Percentage';
809: $Col = 1;
810: }
811: foreach (sort NumericSort keys %GraphDat) {
812: my @Temp=split(/\:/,$GraphDat{$_});
813: my $inf = $Temp[$Col];
814: if ( $Max < $inf ) {$Max = $inf;}
815: $data .= $inf.',';
816: $count++;
817: }
818: untie(%GraphDat);
819: my $Course = $ENV{'course.'.$cid.'.description'};
820: $Course =~ s/\ /"_"/eg;
821: $GData=$Course.'&'.$Tag.'&'.$Max.'&'.$count.'&'.$data;
822:
823: }
824: else {
825: $r->print("Unable to tie hash to db file");
826: }
827: }
828: }
829:
830:
831: sub initial {
832: # --------------------------------- Initialize the global varaibles
833: undef @students;
834: undef @cols;
835: undef %maps;
836: undef %section;
837: undef %StuBox;
838: undef @list;
839: undef %CachData;
840: undef %GraphDat;
841: undef %DiscFac;
842: undef $CurMap;
843: undef $CurSec;
844: undef $CurStu;
845: undef $p_count;
846: undef $Pos;
847: undef $GData;
1.5 ! minaeibi 848: $DiscFlag=0;
! 849: $P_Order=100000;
! 850: $HWN=$P_Order;
1.1 albertel 851: }
852:
853:
854: sub ClassList {
855:
856: &GetStatus();
857:
858: $cid=$ENV{'request.course.id'};
859: my $chome=$ENV{'course.'.$cid.'.home'};
860: my ($cdom,$cnum)=split(/\_/,$cid);
861: # ----------------------- Get first and last resource, see if there is anything
862: $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
863: $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
864: if (($firstres) && ($lastres)) {
865: # ----------------------------------------------------------------- Render page
866: my $classlst=&Apache::lonnet::reply
867: ('dump:'.$cdom.':'.$cnum.':classlist',$chome);
868: my $StudNo = 0;
869: unless ($classlst=~/^error\:/) {
870: foreach (sort split(/\&/,$classlst)) {
871: my ($name,$value)=split(/\=/,$_);
872: my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
873: $name=&Apache::lonnet::unescape($name);
874: my ($sname,$sdom)=split(/\:/,$name);
875: my $ssec=&Apache::lonnet::usection($sdom,$sname,$cid);
876: if ($ssec==-1) {next;}
877: $ssec=($ssec) ? $ssec : '(none)';
1.4 minaeibi 878: #$ssec=(int($ssec)) ? int($ssec) : $ssec;
1.1 albertel 879: #$r->print($sname.'...'.$ssec.'<br>');
880: $section{$ssec}=$ssec;
881: if ($CurSec eq 'All Sections' || $ssec eq $CurSec) {
882: $students[$StudNo]=$name;
883: $StuBox{$sname}=$ssec;
884: }
885: $StudNo++;
886: }
887: }
888: else {
889: $r->print('<h1>Could not access course data</h1>');
1.2 minaeibi 890: }
1.1 albertel 891: $r->print("Total number of students : ".($#students+1));
892: $r->rflush();
893: # --------------- Find all assessments and put them into some linear-like order
894: &tracetable($firstres,'&'.$lastres.'&');
1.2 minaeibi 895:
1.5 ! minaeibi 896: # my $c=0;
! 897: # foreach (sort keys %mapsort) {
! 898: # $r->print('<br>'.$c.')'.$_.' ... '.$mapsort{$_});
! 899: # $c++;
! 900: # }
! 901: #foreach(@cols) {
1.2 minaeibi 902: # $c++;
1.5 ! minaeibi 903: # $r->print('<br>'.$cols[$c]);
1.2 minaeibi 904: #}
905: #$r->print('<br> Count = '.$c);
906:
1.1 albertel 907: }
908:
909: # ------------------------------------------------------------- End render page
910: else {
911: $r->print('<h3>Undefined course sequence</h3>');
912: }
913: &MapSecOptions();
914: }
915:
916:
917: sub Menu {
918: my $InpStr = $ENV{'form.sort'};
919: if ( $InpStr eq 'DoDiff Graph' || $InpStr eq '%Wrong Graph' ) {
920: &GetGraphData($InpStr);
921: $r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />');
922: }
923: else {
924: $r->print('<html><head><title>LON-CAPA Statistics</title></head>');
925:
926:
927: $r->print('<body bgcolor="#FFFFFF">'.
928: '<script>window.focus(); window.width=500;window.height=500; </script>'.
929: '<img align=right src=/adm/lonIcons/lonlogos.gif>');
930: # ---------------------------------------------------------------- Course title
931: $r->print('<h1> Course : "'.
932: $ENV{'course.'.$ENV{'request.course.id'}.
933: '.description'}.'"</h1><h2>'.localtime().'</h2>');
934: # ------------------------------- This is going to take a while, produce output
935: $r->rflush();
936:
937: $r->print("\n".'<form name=stat method=post action="/adm/statistics" >');
938:
939: my $content = $ENV{'form.sort'};
940: if ($content eq '' || $content eq 'Return to Menu') {
941: my $Ptr = '<h3>';
942: $Ptr .= '<input type=submit name=sort value="Problem Evaluation"/>';#General Statistics"/>';
943: $Ptr .= '<br><br>';
944: $Ptr .= '<input type=submit name=sort value="Student Assessment"/>';
945: $Ptr .= '<br><br>';
946: # $Ptr .= '<input type=submit name=sort value=Discrimination>';#"Problem Evaluation"/>';
947: $Ptr .= '</h3>';
948: $r->print( $Ptr );
949: }
950: else {
951: &initial();
952: &ClassList();
953: if ( $content eq 'Discrimination' || #'Problem Evaluation' ||
954: $content eq 'Recalculate Discrimintion Factor' ) {
955: &CreateDiscFac();
956: }
957: elsif ( $content eq 'Student Assessment' ||
958: $content eq 'Create Student Report' ) {
959: &StudentOptions();
960: &StudentReport($CurStu,$StuBox{"$CurStu"});
961: }
962: else {
963: &PreStatTable();
964: }
965: }
966: $r->print("\n".'</form>'.
967: "\n".'</body>'.
968: "\n".'</html>');
969: $r->rflush();
970: }
971: }
972:
973: sub StudentOptions {
974: my $OpSel5='';
975: $CurStu = $ENV{'form.student'};
976: if ( $CurStu eq '' ) {
977: $CurStu = 'All Students';
978: $OpSel5 = 'selected';
979: }
980: my $Ptr ='';
981: # ----------------------------------- Loading the Students Combobox
982: $Ptr .= '<br><b>Select Student</b>'."\n".
983: '<select name="student">'."\n".
984: '<option '.$OpSel5.'>All Students</option>';
985: foreach my $key ( sort keys %StuBox ) {
986: $Ptr .= '<option';
987: if ($CurStu eq $key) {$Ptr .= ' selected';}
988: $Ptr .= '>'.$key."</option>\n";
989: }
990: $Ptr .= '</select>';
991: $Ptr .= '<br><input type="submit" name="sort" value="Create Student Report" />';
992: $r->print( $Ptr );
993: $r->rflush();
994: }
995:
996: sub GetStatus {
997:
998: $OpSelDis1='';
999: $OpSelDis2='';
1000: $OpSel1='';
1001: $OpSel2='';
1002: $OpSel3='';
1003: $OpSel4='';
1004:
1005: # if ( $ENV{'form.DisType'} eq 'Total Number of Correct Answers' ) {
1006: # $OpSelDis1='selected';
1007: # $CurDis=0;
1008: # }
1009: # else { $OpSel2 = 'selected'; $CurDis = 1;}
1010:
1011: if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
1012: else { $OpSel1 = 'selected'; }
1.5 ! minaeibi 1013:
! 1014: my %myHeader = reverse( %Header );
! 1015: $Pos = $myHeader{$ENV{'form.sort'}};
! 1016: if ($Pos == 0) {
! 1017: $OpSel1 = 'selected';
! 1018: $ENV{'form.order'}='Ascendig';
! 1019: }
! 1020:
1.1 albertel 1021: $CurMap = $ENV{'form.maps'};
1022: if ( $CurMap eq '' ) {
1023: $CurMap = 'All Maps';
1024: $OpSel3 = 'selected';
1025: }
1026: $CurSec = $ENV{'form.section'};
1027: if ( $CurSec eq '' ) {
1028: $CurSec = 'All Sections';
1029: $OpSel4 = 'selected';
1030: }
1031: }
1032:
1033:
1034: sub MapSecOptions {
1035: # ----------------------------------- Loading the Maps Combobox
1036: my $Ptr = '<br>';
1037: $Ptr .= '<br><input type="submit" name="sort" value="Return to Menu" />';
1038: $Ptr .= '<br><b> Select Map </b>'."\n".
1039: '<select name="maps">'."\n".
1040: '<option '.$OpSel3.'>All Maps</option>';
1041: foreach my $key ( sort keys %maps ) {
1042: $Ptr .= '<option';
1043: if ($CurMap eq $key) {$Ptr .= ' selected';}
1044: $Ptr .= '>'.$key."</option>\n";
1045: }
1046: $Ptr .= '</select>';
1047: $Ptr .= ' ';
1048:
1049: # ----------------------------------- Loading the Sections Combobox
1050: $Ptr .= '<br><b>Select Section</b>'."\n".
1051: '<select name="section">'."\n".
1052: '<option '.$OpSel4.'>All Sections</option>';
1053: foreach my $key ( sort keys %section ) {
1054: $Ptr .= '<option';
1055: if ($CurSec eq $key) {$Ptr .= ' selected';}
1056: $Ptr .= '>'.$key."</option>"."\n";
1057: }
1058: $Ptr .= '</select>'."\n";
1059:
1060: $r->print( $Ptr );
1061: $r->rflush();
1062: }
1063:
1064:
1065: # ================================================================ Main Handler
1066:
1067: sub handler {
1068: $r=shift;
1069:
1070: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
1071: # ------------------------------------------- Set document type for header only
1072: if ($r->header_only) {
1073: if ($ENV{'browser.mathml'}) {
1074: $r->content_type('text/xml');
1075: }
1076: else {
1077: $r->content_type('text/html');
1078: }
1079: $r->send_http_header;
1080: return OK;
1081: }
1082: my $requrl=$r->uri;
1083: # ----------------------------------------------------------------- Tie db file
1084:
1085: undef %hash;
1086:
1087: if ($ENV{'request.course.fn'}) {
1088: my $fn=$ENV{'request.course.fn'};
1089: if (-e "$fn.db") {
1090: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
1091: # ------------------------------------------------------------------- Hash tied
1092: $r->content_type('text/html');
1093: $r->send_http_header;
1094: &Menu();
1095: }
1096: else {
1097: $r->content_type('text/html');
1098: $r->send_http_header;
1099: $r->print('<html><body>Coursemap undefined.</body></html>');
1100: }
1101: # ------------------------------------------------------------------ Untie hash
1102: unless (untie(%hash)) {
1103: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1104: "Could not untie coursemap $fn (browse).</font>");
1105: }
1106:
1107: # -------------------------------------------------------------------- All done
1108: return OK;
1109: # ----------------------------------------------- Errors, hash could no be tied
1110: }
1111: }
1112: else {
1113: $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
1114: return HTTP_NOT_ACCEPTABLE;
1115: }
1116: }
1117: else {
1118: $ENV{'user.error.msg'}=
1119: $r->uri.":vgr:0:0:Cannot view grades for complete course";
1120:
1121: return HTTP_NOT_ACCEPTABLE;
1122: }
1123: }
1124: 1;
1125: __END__
1126:
1127:
1128:
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