--- loncom/interface/lonstatistics.pm 2002/02/06 16:59:01 1.4 +++ loncom/interface/lonstatistics.pm 2002/08/05 20:53:38 1.39 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # (Publication Handler # -# $Id: lonstatistics.pm,v 1.4 2002/02/06 16:59:01 minaeibi Exp $ +# $Id: lonstatistics.pm,v 1.39 2002/08/05 20:53:38 stredwic Exp $ # # Copyright Michigan State University Board of Trustees # @@ -27,12 +27,12 @@ # # (Navigate problems for statistical reports # YEAR=2001 -# 5/05/01, 7/09/01, 7/25/01, 8/11/01,9/13/01, 9/26/01 Behrouz Minaei -# 10/5/01, 10/9/01, 10/22/01, 10/26/01 Behrouz Minaei -# 11/1/01, 11/4/01, 11/16/01 Behrouz Minaei -# 12/14/01, 12/16/01, 12/18/01,12/20/01,12/31/01 Behrouz Minaei +# 5/5,7/9,7/25/1,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei +# 11/1,11/4,11/16,12/14,12/16,12/18,12/20,12/31 Behrouz Minaei # YEAR=2002 -# 1/22/02,2/1/02 Behrouz Minaei +# 1/22,2/1,2/6,2/25,3/2,3/6,3/17,3/21,3/22,3/26,4/7,5/6 Behrouz Minaei +# 5/12,5/14,5/15,5/19,5/26,7/16,25/7,29/7 Behrouz Minaei +# ### package Apache::lonstatistics; @@ -41,1022 +41,629 @@ use strict; use Apache::Constants qw(:common :http); use Apache::lonnet(); use Apache::lonhomework; +use Apache::loncommon; +use Apache::loncoursedata; +use Apache::lonhtmlcommon; +use Apache::lonproblemanalysis; +use Apache::lonproblemstatistics; +use Apache::lonstudentassessment; +use Apache::lonchart; use HTML::TokeParser; use GDBM_File; -#use Benchmark; -# -------------------------------------------------------------- Module Globals -my %hash; -my %CachData; -my %GraphDat; -my %maps; -my @mapsort; -my %section; -my %StuBox; -my %DiscFac; -my $CurMap; -my $CurSec; -my $CurStu; -my @cols; -my @list; -my @students; -my $p_count; -my $Pos; -my $r; -my $OpSel1; -my $OpSel2; -my $OpSelDis1; -my $OpSelDis2; -my $CurDis=0; -my $OpSel3; -my $OpSel4; -my $GData; -my $cid; -my $firstres; -my $lastres; -my $DiscFlag=0; -my $HWN=0; - -my %Header = (0,"Problem Title",1,"#Stdnts",2,"Tries",3,"Mod", - 4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"S.D.", - 9,"Skew.",10,"DoDiff",11,"Map"); -# 9,"Skew.",10,"DoDiff",11,"Dis.F.",12,"Resourse URL"); -sub NumericSort { - $a <=> $b; -} +sub CheckFormElement { + my ($cache, $ENVName, $cacheName, $default)=@_; -# ------ Create different Student Report -sub StudentReport { - my ($sname,$sdom)=@_; - if ( $sname eq 'All Students' ) { - $r->print( '

WARNING: - Please select a student

' ); - return; - } - my $shome=&Apache::lonnet::homeserver( $sname,$sdom ); - my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome ); - my %result = (); - my $ResId; - my $Code; - my $Tries; - my $TotalTries = 0; - my $ParCr = 0; - my $Wrongs; - my %TempHash; - my $Version; - my $LatestVersion; - my $PtrTry=''; - my $PtrCod=''; - my $SetNo=0; - my $Str = "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''; - unless ($reply=~/^error\:/) { - map { - my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_)); - $result{$name}=$value; - } split(/\&/,$reply);; - foreach $ResId (@cols) { - if ( !$ResId ) { - my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1}); - if ( $Set ) { - $SetNo++; - $Str .= "\n"."". - "\n"."". - "\n"."". - "\n"."". - "\n"."". - "\n".""; - } - $PtrTry=''; - $PtrCod=''; - next; - } - $ResId=~/(\d+)\.(\d+)/; - my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} ); - if ( $CurMap ne 'All Maps' ) { - my ( $ResMap, $NameMap ) = split(/\=/,$CurMap); - if ( $Map ne $ResMap ) { next; } - } - my $meta=$hash{'src_'.$ResId}; - my $PartNo = 0; - undef %TempHash; - map { - if ($_=~/^stores\_(\d+)\_tries$/) { - my $Part=&Apache::lonnet::metadata($meta,$_.'.part'); - if ( $TempHash{"$Part"} eq '' ) { - $TempHash{"$Part"} = $Part; - $TempHash{$PartNo}=$Part; - $TempHash{"$Part.Code"} = '-'; - $PartNo++; - } - } - } split(/\,/,&Apache::lonnet::metadata($meta,'keys')); - - my $Prob = $Map.'___'.$2.'___'. - &Apache::lonnet::declutter( $hash{'src_'.$ResId} ); - $Code='U'; - $Tries = 0; - $Wrongs = 0; - $LatestVersion = $result{"version:$Prob"}; - - if ( $LatestVersion ) { - for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) { - my $vkeys = $result{"$Version:keys:$Prob"}; - my @keys = split(/\:/,$vkeys); - - foreach my $Key (@keys) { - if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) { - my $Part = $1; - $Tries = $result{"$Version:$Prob:resource.$Part.tries"}; - $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0; - $TotalTries += $Tries; - my $Val = $result{"$Version:$Prob:resource.$Part.solved"}; - if ( $Val eq 'correct_by_student' ) - { $Wrongs = $Tries - 1; $Code = 'Y'; } - elsif ( $Val eq 'correct_by_override' ) - { $Wrongs = $Tries - 1; $Code = 'y'; } - elsif ( $Val eq 'incorrect_attempted' || - $Val eq 'incorrect_by_override' ) - { $Wrongs = $Tries; $Code = 'N'; } - $TempHash{"$Part.Code"} = $Code; - $TempHash{"$Part.Wrongs"} = $Wrongs; - } - } - } - for ( my $n = 0; $n < $PartNo; $n++ ) { - my $part = $TempHash{$n}; - if ($PtrTry ne '') {$PtrTry .= ',';} - $PtrTry .= "$TempHash{$part.'.Tries'}"; - $PtrCod .= "$TempHash{$part.'.Code'}"; - } + if(defined($ENV{'form.'.$ENVName})) { + $cache->{$cacheName} = $ENV{'form.'.$ENVName}; + } elsif(!defined($cache->{$cacheName})) { + $cache->{$cacheName} = $default; + } + + return; +} + +sub ProcessFormData{ + my ($cache)=@_; + + $cache->{'reportKey'} = 'false'; + + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['sort','download', + 'reportSelected', + 'StudentAssessmentStudent']); + &CheckFormElement($cache, 'Status', 'Status', 'Active'); + &CheckFormElement($cache, 'postdata', 'reportSelected', 'Class list'); + &CheckFormElement($cache, 'reportSelected', 'reportSelected', + 'Class list'); + $cache->{'reportSelected'} = + &Apache::lonnet::unescape($cache->{'reportSelected'}); + &CheckFormElement($cache, 'DownloadAll', 'DownloadAll', 'false'); + &CheckFormElement($cache, 'sort', 'sort', 'fullname'); + &CheckFormElement($cache, 'download', 'download', 'false'); + + # student assessment + if(defined($ENV{'form.CreateStudentAssessment'}) || + defined($ENV{'form.NextStudent'}) || + defined($ENV{'form.PreviousStudent'})) { + $cache->{'reportSelected'} = 'Student Assessment'; + } + if(defined($ENV{'form.NextStudent'})) { + $cache->{'StudentAssessmentMove'} = 'next'; + } elsif(defined($ENV{'form.PreviousStudent'})) { + $cache->{'StudentAssessmentMove'} = 'previous'; + } else { + $cache->{'StudentAssessmentMove'} = 'selected'; + } + &CheckFormElement($cache, 'StudentAssessmentStudent', + 'StudentAssessmentStudent', 'All Students'); + $cache->{'StudentAssessmentStudent'} = + &Apache::lonnet::unescape($cache->{'StudentAssessmentStudent'}); + &CheckFormElement($cache, 'DefaultColumns', 'DefaultColumns', 'false'); + + if(defined($ENV{'form.Section'})) { + my @sectionsSelected = (ref($ENV{'form.Section'}) ? + @{$ENV{'form.Section'}} : + ($ENV{'form.Section'})); + $cache->{'sectionsSelected'} = join(':', @sectionsSelected); + } elsif(!defined($cache->{'sectionsSelected'})) { + $cache->{'sectionsSelected'} = $cache->{'sectionList'}; + } + + # Problem analysis + &CheckFormElement($cache, 'Interval', 'Interval', '1'); + + # ProblemStatistcs + &CheckFormElement($cache, 'DisplayCSVFormat', + 'DisplayFormat', 'Display Table Format'); + &CheckFormElement($cache, 'ProblemStatisticsAscend', + 'ProblemStatisticsAscend', 'Ascending'); + &CheckFormElement($cache, 'ProblemStatisticsMaps', + 'ProblemStatisticsMaps', 'All Maps'); + + # Search only form elements + my @headingColumns=(); + my @sequenceColumns=(); + my $foundColumn = 0; + if(defined($ENV{'form.ReselectColumns'})) { + my @reselected = (ref($ENV{'form.ReselectColumns'}) ? + @{$ENV{'form.ReselectColumns'}} + : ($ENV{'form.ReselectColumns'})); + foreach (@reselected) { + if(/HeadingColumn/) { + push(@headingColumns, $_); + $foundColumn = 1; + } elsif(/SequenceColumn/) { + push(@sequenceColumns, $_); + $foundColumn = 1; } - else { - for(my $n=0; $n<$PartNo; $n++) { - if ($PtrTry ne '') {$PtrTry .= ',';} - $PtrTry .= "0"; - $PtrCod .= "-"; - } - } } } - $Str .= "\n".'
# Set Title Results Tries
$SetNo $Set $PtrCod $PtrTry
'; - $r->print($Str); - $r->rflush(); -} - -# ------------------------------------------- Prepare Statistics Table -sub PreStatTable { - my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}". - "_$ENV{'user.domain'}_$cid\_statistics.db"; - my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}". - "_$ENV{'user.domain'}_$cid\_graph.db"; - my $CachDisFac = "/home/httpd/perl/tmp/$ENV{'user.name'}". - "_$ENV{'user.domain'}_$cid\_DiscFactor.db"; - $r->print('
'); - - my $Ptr = ''; - - $Ptr .= '
Sorting Type:   '."\n". - ' '."\n"; - $Ptr .= '   '; - $Ptr .= ''."\n"; - $Ptr .= '   '; - $Ptr .= ''."\n"; - - $Ptr .= '
'.
-    '  #Stdnts: Total Number of Students opened the problem.
'. 
-    '  Tries  : Total Number of Tries for solving the problem.
'. 
-    '  Mod    : Maximunm Number of Tries for solving the problem.
'. 
-    '  Mean   : Average Number of the tries. [ Tries / #Stdns ]
'.
-    '  #YES   : Number of students solved the problem correctly.
'. 
-    '  #yes   : Number of students solved the problem by override.
'.
-    '  %Wrng  : Percentage of students tried to solve the problem but'.
-    ' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]
'.
-    '  S.D.   : Standard Deviation of the tries.'.
-    '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
-    ' where Xi is every student\'s tries ]
'.
-    '  Skew.  : Skewness of the students tries.'.
-    ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]
'.
-#    '  DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]
'.
-    '  DoDiff : Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]
'.
-#    '  Dis.F. : Discrimination Factor. [ Sum of Partial Credits Awarded / Total Number of Tries in %27 upper and lower students]'.	
-            '
'; - - $r->print($Ptr); - $r->rflush(); - - my $Result = "\n".''; - $Result .= ''."\n"; - for ( my $nIdx=0; $nIdx < 12; $nIdx++ ) { - $Result .= ''."\n"; + $cache->{'reportKey'} = 'false'; + if($cache->{'reportSelected'} eq 'Analyze') { + $cache->{'reportKey'} = 'Analyze'; + } elsif($cache->{'reportSelected'} eq 'DoDiffGraph') { + $cache->{'reportKey'} = 'DoDiffGraph'; + } elsif($cache->{'reportSelected'} eq 'PercentWrongGraph') { + $cache->{'reportKey'} = 'PercentWrongGraph'; + } + + if(defined($ENV{'form.DoDiffGraph'})) { + $cache->{'reportSelected'} = 'DoDiffGraph'; + $cache->{'reportKey'} = 'DoDiffGraph'; + } elsif(defined($ENV{'form.PercentWrongGraph'})) { + $cache->{'reportSelected'} = 'PercentWrongGraph'; + $cache->{'reportKey'} = 'PercentWrongGraph'; + } + + foreach (keys(%ENV)) { + if(/form\.Analyze/) { + $cache->{'reportSelected'} = 'Analyze'; + $cache->{'reportKey'} = 'Analyze'; + my $data; + (undef, $data)=split(':::', $_); + $cache->{'AnalyzeInfo'}=$data; + } elsif(/form\.HeadingColumn/) { + my $value = $_; + $value =~ s/form\.//; + push(@headingColumns, $value); + $foundColumn=1; + } elsif(/form\.SequenceColumn/) { + my $value = $_; + $value =~ s/form\.//; + push(@sequenceColumns, $value); + $foundColumn=1; + } } - $Result .= "\n".''."\n"; - $r->print( $Result ); - $r->rflush(); - if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) { - if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) { - tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640); - &Cache_Statistics(); - } - else { - $r->print("Unable to tie hash to db file"); - } + if($foundColumn) { + $cache->{'HeadingsFound'} = join(':', @headingColumns); + $cache->{'SequencesFound'} = join(':', @sequenceColumns);; } - else { - if (tie(%CachData,'GDBM_File',$CacheDB,&GDBM_WRCREAT,0640)) { - tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_WRCREAT,0640); - tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640); - foreach (keys %DiscFac) {delete $CachData{$_};} - foreach (keys %CachData) {delete $CachData{$_};} - $DiscFlag=0; - &Build_Statistics(); - } - else { - $r->print("Unable to tie hash to db file"); - } + if(!defined($cache->{'HeadingsFound'}) || + $cache->{'DefaultColumns'} ne 'false') { + $cache->{'HeadingsFound'}='HeadingColumnFull Name'; } - #$r->print('Total instances of the problems : '.($p_count*($#students+1))); - - untie(%CachData); - untie(%GraphDat); - untie(%DiscFac); + if(!defined($cache->{'SequencesFound'}) || + $cache->{'DefaultColumns'} ne 'false') { + $cache->{'SequencesFound'}='All Sequences'; + } + $cache->{'DefaultColumns'} = 'false'; - $r->print("\n".'
P#'.''.'
'."\n"); - $r->rflush(); + return; } +=pod + +=item &SortStudents() + +Determines which students to display and in which order. Which are +displayed are determined by their status(active/expired). The order +is determined by the sort button pressed (default to username). The +type of sorting is username, lastname, or section. -# ------------------------------------- Find the section of student in a course +=over 4 -sub usection { - my ($udom,$unam,$courseid)=@_; - $courseid=~s/\_/\//g; - $courseid=~s/^(\w)/\/$1/; - map { - my ($key,$value)=split(/\=/,$_); - $key=&Apache::lonnet::unescape($key); - if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) { - my $section=$1; - if ($key eq $courseid.'_st') { $section=''; } - my ($dummy,$end,$start)=split(/\_/,&Apache::lonnet::unescape($value)); - $section=($section) ? $section : '(none)'; -# $section=(int($section)) ? int($section) : $section; -# $r->print($unam.'...'.$section.'
'); - return $section; +Input: $students, $CacheData + +$students: A array pointer to a list of students (username:domain) + +$CacheData: A pointer to the hash tied to the cached data + +Output: \@order + +@order: An ordered list of students (username:domain) + +=back + +=cut + +sub SortStudents { + my ($cache)=@_; + + my @students = split(':::',$cache->{'NamesOfStudents'}); + my @sorted1Students=(); + foreach (@students) { + if($cache->{'Status'} eq 'Any' || + $cache->{$_.':Status'} eq $cache->{'Status'}) { + push(@sorted1Students, $_); } - } split(/\&/,&Apache::lonnet::reply('dump:'.$udom.':'.$unam.':roles', - &Apache::lonnet::homeserver($unam,$udom))); - return ''; + } + + my $sortBy = ''; + if(defined($cache->{'sort'})) { + $sortBy = ':'.$cache->{'sort'}; + } + my @order = sort { $cache->{$a.$sortBy} cmp $cache->{$b.$sortBy} || + $cache->{$a.':fullname'} cmp $cache->{$b.':fullname'} } + @sorted1Students; + + return \@order; } +=pod + +=item &SpaceColumns() + +Determines the width of all the columns in the chart. It is based on +the max of the data for that column and its header. -# ------ Dump the Student's DB file and handling the data for statistics table +=over 4 -sub ExtractStudentData { - my ($student,$coid)=@_; - my ($sname,$sdom) = split( /\:/, $student ); - my $shome=&Apache::lonnet::homeserver( $sname,$sdom ); - my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome ); - my %result = (); - my $ResId; - my $Dis = ''; - my $Code; - my $Tries; - my $ParCr; - my $TotalTries = 0; - my $TotalOpend = 0; - my $ProbSolved = 0; - my $ProbTot = 0; - my $TimeTot = 0; - my $TotParCr = 0; - my $Wrongs; - my %TempHash; - my $Version; - my $LatestVersion; - my $SecLimit; - my $MapLimit; - unless ($reply=~/^error\:/) { - map { - my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_)); - $result{$name}=$value; -#$r->print($name.'='.$value.'
'); - } split(/\&/,$reply); - foreach $ResId (@cols) { - if ( !$ResId ) { next; } - $ResId=~/(\d+)\.(\d+)/; - my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} ); - if ( $CurMap ne 'All Maps' ) { - my ( $ResMap, $NameMap ) = split(/\=/,$CurMap); - if ( $Map ne $ResMap ) { next; } - } - my $meta=$hash{'src_'.$ResId}; - my $PartNo = 0; - $Dis .= ':'; - undef %TempHash; - map { - if ($_=~/^stores\_(\d+)\_tries$/) { - my $Part=&Apache::lonnet::metadata($meta,$_.'.part'); - if ( $TempHash{"$Part"} eq '' ) { - $TempHash{"$Part"} = $Part; - $TempHash{$PartNo}=$Part; - $TempHash{"$Part.Code"} = 'U'; - $PartNo++; - } - } - } split(/\,/,&Apache::lonnet::metadata($meta,'keys')); - - my $Prob = $Map.'___'.$2.'___'. - &Apache::lonnet::declutter( $hash{'src_'.$ResId} ); - $Code='U'; - $Tries = 0; - $ParCr = 0; - $Wrongs = 0; - $LatestVersion = $result{"version:$Prob"}; - - if ( $LatestVersion ) { - for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) { - my $vkeys = $result{"$Version:keys:$Prob"}; - my @keys = split(/\:/,$vkeys); - - foreach my $Key (@keys) { - if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) { - my $Part = $1; - $Tries = $result{"$Version:$Prob:resource.$Part.tries"}; - $ParCr = $result{"$Version:$Prob:resource.$Part.awarded"}; - my $Time = $result{"$Version:$Prob:timestamp"}; - $TempHash{"$Part.Time"} = ($Time) ? $Time : 0; - $TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0; - $TempHash{"$Part.ParCr"} = ($ParCr) ? $ParCr : 0; - $TotalTries += $TempHash{"$Part.Tries"}; - $TotParCr += $TempHash{"$Part.ParCr"}; -#$r->print($Version.'---'.$Prob.'==='.$Time.'
'); - my $Val = $result{"$Version:$Prob:resource.$Part.solved"}; - if ( $Val eq 'correct_by_student' ) - { $Wrongs = $Tries - 1; $Code = 'C'; } - elsif ( $Val eq 'correct_by_override' ) - { $Wrongs = $Tries - 1; $Code = 'O'; } - elsif ( $Val eq 'incorrect_attempted' || - $Val eq 'incorrect_by_override' ) - { $Wrongs = $Tries; $Code = 'I'; } - $TempHash{"$Part.Code"} = $Code; - $TempHash{"$Part.Wrongs"} = $Wrongs; - } - } - } - for ( my $n = 0; $n < $PartNo; $n++ ) { - my $part = $TempHash{$n}; - my $Yes = 0; - if ( $TempHash{$part.'.Code'} eq 'C' || - $TempHash{$part.'.Code'} eq 'O' ) - {$ProbSolved++;$Yes=1;} - my $ptr = "$hash{'title_'.$ResId}"; - if ( $PartNo > 1 ) { - $ptr .= " (part $part)"; - $Dis .= ':'; - } - my $Fac = ($TempHash{"$part.Tries"}) ? - ($TempHash{"$part.ParCr"}/$TempHash{"$part.Tries"}) : 0; - my $DisF; - if ( $Fac > 0 && $Fac < 1 ) { - $DisF = sprintf( "%.4f", $Fac ); - } - else {$DisF = $Fac;} -# $DisF .= '+'.$TempHash{"$part.Time"}; - $TimeTot += $TempHash{"$part.Time"}; - $Dis .= $ptr.'*'.$ResId.'='.$DisF.'+'.$Yes; - $ptr .= "*$ResId:$TempHash{$part.'.Tries'}". - ":$TempHash{$part.'.Wrongs'}". - ":$TempHash{$part.'.Code'}"; -#$r->print($sname.' -- '.$ptr.'--- timestamp='.$TempHash{"$part.Time"}.'
'); - push (@list, $ptr); - $TotalOpend++; - $ProbTot++; - } +Input: $students, $studentInformation, $headings, $ChartDB + +$students: An array pointer to a list of students (username:domain) + +$studentInformatin: The type of data for the student information. It is +used as part of the key in $CacheData. + +$headings: The name of the student information columns. + +$ChartDB: The name of the cache database which is opened for read/write. + +Output: None - All data stored in cache. + +=back + +=cut + +sub SpaceColumns { + my ($students,$studentInformation,$headings,$cache)=@_; + + # Initialize Lengths + for(my $index=0; $index<(scalar @$headings); $index++) { + my @titleLength=split(//,$headings->[$index]); + $cache->{$studentInformation->[$index].':columnWidth'}= + scalar @titleLength; + } + + foreach my $name (@$students) { + foreach (@$studentInformation) { + my @dataLength=split(//,$cache->{$name.':'.$_}); + my $length=(scalar @dataLength); + if($length > $cache->{$_.':columnWidth'}) { + $cache->{$_.':columnWidth'}=$length; } - else { - for(my $n=0; $n<$PartNo; $n++) { - push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U"); - $ProbTot++; - } - } } - if ( $TotalTries ) { - my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0; -# my $DisFactor = int(sprintf( "%.4f", $DisFac ) * 100); - my $DisFactor = sprintf( "%.4f", $DisFac ); - my $time; - if ($ProbSolved){ - $time = int(($TimeTot/$ProbSolved)/10000000); - } - $DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'. - $TotalTries.':'.$ProbSolved.':'.$time)}=$Dis; -#$r->print($DisFactor.$sname.'
--- Dis= '.$Dis.'
'); - } } - #$r->print($sname.' PrCr= '.$TotParCr.' Slvd= '.$ProbSolved.' Tries='.$TotalTries.'
'); + + return; } +sub PrepareData { + my ($c, $cacheDB, $studentInformation, $headings,$r)=@_; -# ------------------------------------------------------------ Build page table -sub tracetable { - my ($rid,$beenhere)=@_; - $rid=~/(\d+)\.(\d+)/; - $maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid}; - unless ($beenhere=~/\&$rid\&/) { - $beenhere.=$rid.'&'; - if (defined($hash{'is_map_'.$rid})) { - my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}}; - if ( $cmap eq 'sequence' || $cmap eq 'page' ) { - $cols[$#cols+1]=0; - $HWN++; - $mapsort[$HWN]=$rid.$hash{'title_'.$rid}; - #$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}= - # $hash{'title_'.$rid}; - } - if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) && - (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) { - my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; - - &tracetable($hash{'map_start_'.$hash{'src_'.$rid}}, - '&'.$frid.'&'); - - if ($hash{'src_'.$frid}) { - if ($hash{'src_'.$frid}=~ - /\.(problem|exam|quiz|assess|survey|form)$/) { - $cols[$#cols+1]=$frid; - $mapsort[$HWN] .= '&'.$frid; - } - } - } - } else { - if ($hash{'src_'.$rid}) { - if ($hash{'src_'.$rid}=~ - /\.(problem|exam|quiz|assess|survey|form)$/) { - $cols[$#cols+1]=$rid; - $mapsort[$HWN] .= '&'.$rid; - } - } - } - if (defined($hash{'to_'.$rid})) { - map { - &tracetable($hash{'goesto_'.$_},$beenhere); - } split(/\,/,$hash{'to_'.$rid}); - } + # Test for access to the cache data + my $courseID=$ENV{'request.course.id'}; + my $isRecalculate=0; + if(defined($ENV{'form.Recalculate'})) { + $isRecalculate=1; + } + + my $isCached = &Apache::loncoursedata::TestCacheData($cacheDB, + $isRecalculate); + if($isCached < 0) { + return "Unable to tie hash to db file."; + } + + # Download class list information if not using cached data + my %cache; + unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { + return "Unable to tie hash to db file."; + } + + if(!$isCached) { + my $processTopResourceMapReturn= + &Apache::loncoursedata::ProcessTopResourceMap(\%cache, $c, $r); + if($processTopResourceMapReturn ne 'OK') { + untie(%cache); + return $processTopResourceMapReturn; + } + } + + if($c->aborted()) { + untie(%cache); + return 'aborted'; + } + + my $classlist=&Apache::loncoursedata::DownloadClasslist($courseID, + $cache{'ClasslistTimestamp'}, + $c); + foreach (keys(%$classlist)) { + if(/^(con_lost|error|no_such_host)/i) { + untie(%cache); + return "Error getting student data."; + } + } + + if($c->aborted()) { + untie(%cache); + return 'aborted'; + } + + # Active is a temporary solution, remember to change + Apache::loncoursedata::ProcessClasslist(\%cache,$classlist,$courseID,$c); + if($c->aborted()) { + untie(%cache); + return 'aborted'; + } + + &ProcessFormData(\%cache); + my $students = &SortStudents(\%cache); + &SpaceColumns($students, $studentInformation, $headings, \%cache); + $cache{'updateTime:columnWidth'}=24; + + if($cache{'download'} ne 'false') { + my $who = $cache{'download'}; + my $courseData = + &Apache::loncoursedata::DownloadCourseInformation( + $who, $courseID, + $cache{$who.':lastDownloadTime'}); + &Apache::loncoursedata::ProcessStudentData(\%cache, $courseData, $who); + $cache{'download'} = 'false'; + } elsif($cache{'DownloadAll'} ne 'false') { + $cache{'DownloadAll'} = 'false'; + my @allStudents; + if($cache{'DownloadAll'} eq 'sorted') { + @allStudents = @$students; + } else { + @allStudents = split(':::', $cache{'NamesOfStudents'}); + } + &Create_PrgWin($r); + my $count=1; + foreach (@allStudents) { + &Update_PrgWin(scalar(@allStudents),$count,$_,$r); + my $courseData = + &Apache::loncoursedata::DownloadCourseInformation( + $_, $courseID, + $cache{$_.':lastDownloadTime'}); + &Apache::loncoursedata::ProcessStudentData(\%cache, $courseData, + $_); + if($c->aborted()) { + untie(%cache); + return 'aborted'; + } + $count++; + } + &Close_PrgWin($r); } -} -sub MySort { - if ( $Pos > 0 && $Pos < 11 ) { - if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;} - else { $a <=> $b; } - } - else { - if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;} - else { $a cmp $b; } + if($c->aborted()) { + untie(%cache); + return 'aborted'; } + + untie(%cache); + + return ('OK', $students); } -sub Build_Statistics { + +# Create progress +sub Create_PrgWin { + my ($r)=@_; $r->print(< + + ENDPOP $r->rflush(); -# ---------------------------- Gathering the Data of students' tries - my $index; - for ($index=0;$index<=$#students;$index++) { -#----------- update progress - $r->print(''); - $r->rflush(); - - &ExtractStudentData($students[$index],$cid); - } -#--------------------- close Progress Line - $r->print(''); - $r->rflush(); -# -------------------- sorting the Data - @list = sort(@list); - $OpSel2=''; - $OpSel1='selected'; - - $p_count = 0; - my $nIdx = 0; - my $dummy; - my $p_val; - my $ResId; - my $NoElements = $#list + 1; -#-------------------------------- loop for data representation - while ( $nIdx < $NoElements ) { - my %storestats=(); - my ($Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]); - my $Temp = $Prob; - my $MxTries = 0; - my $TotalTries = 0; - my $YES = 0; - my $Incorrect = 0; - my $Override = 0; - my $StdNo = 0; - my @StdLst; - do { - $nIdx++; - $StdNo++; - $StdLst[ $StdNo ] = $Tries; - $TotalTries += $Tries; - if ( $MxTries < $Tries ) { $MxTries = $Tries; } - if ( $Code eq 'C' ){ $YES++; } - elsif( $Code eq 'I' ) { $Incorrect++; } - elsif( $Code eq 'O' ) { $Override++; } - elsif( $Code eq 'U' ) { $StdNo--; } - ($Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]); - } while ( $Prob eq $Temp && $nIdx < $NoElements ); - - $p_count++; - - ($Temp,$ResId)=split(/\*/,$Temp); - - $Temp = ''.$Temp.''; - - my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId}); - my $urlres=$res; - - $ResId=~/(\d+)\.(\d+)/; - my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} ); - $urlres=$Map; - - - $res = ''.$res.''; - - #$Map = ''.$res.''; - -#------------------------ Compute the Average of Tries about one problem - my $Average = ($StdNo) ? $TotalTries/$StdNo : 0; - - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time; - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo; - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average; - -#-------------------------------- Compute percentage of Wrong tries - my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0; - -#-------------------------------- Compute Standard Deviation - my $StdDev = 0; - if ( $StdNo > 1 ) { - for ( my $n = 0; $n < $StdNo; $n++ ) { - my $Dif = $StdLst[ $n ]-$Average; - $StdDev += $Dif*$Dif; - } - $StdDev /= ( $StdNo - 1 ); - $StdDev = sqrt( $StdDev ); - } - -#-------------------------------- Compute Degree of Difficulty - my $DoDiff = 0; - if( $TotalTries > 0 ) { - $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries ); -# $DoDiff = ($TotalTries)/($YES + $Override+ 0.1); - } - - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff; - -#-------------------------------- Compute the Skewness - my $Skewness = 0; - my $Sum = 0; - if ( $StdNo > 0 && $StdDev > 0 ) { - for ( my $n = 0; $n < $StdNo; $n++ ) { - my $Dif = $StdLst[ $n ]-$Average; - $Skewness += $Dif*$Dif*$Dif; - } - $Skewness /= $StdNo; - $Skewness /= $StdDev*$StdDev*$StdDev; - } -#----------------- Some restition in presenting the float numbers - my $Avg = sprintf( "%.2f", $Average ); - my $Wrng = sprintf( "%.1f", $Wrong ); - my $SD = sprintf( "%.1f", $StdDev ); - my $DoD = sprintf( "%.2f", $DoDiff ); - my $Sk = sprintf( "%.1f", $Skewness ); - - $CachData{($p_count-1)}=$Temp.':'.$StdNo.':'.$TotalTries.':'. - $MxTries.':'.$Avg.':'.$YES.':'. - $Override.':'.$Wrng.':'.$SD.':'. - $Sk.':'.$DoD.':'.$Map.':'.$Prob; - - $urlres=~/^(\w+)\/(\w+)/; - if ($StdNo) { - &Apache::lonnet::put('resevaldata',\%storestats,$1,$2); - } - -#-------------------------------- Row of statistical table - if ( $DiscFlag == 0 ) { - $r->print( "\n".''. - "\n".''.$p_count.''. - "\n".''.$Temp.''. - "\n".''.$StdNo.''. - "\n".''.$TotalTries.''. - "\n".''.$MxTries.''. - "\n".''.$Avg.''. - "\n".''.$YES.''. - "\n".''.$Override.''. - "\n".''.$Wrng.''. - "\n".''.$SD.''. - "\n".''.$Sk.''. - "\n".''.$DoD.''. - "\n".''.$Map.''. - "\n".'' ); - $GraphDat{$nIdx}=$DoD.':'.$Wrng; - } - } } - -sub Cache_Statistics { - my @list = (); - my $Useful; - my $UnUseful; - my %myHeader = reverse( %Header ); - $Pos = $myHeader{$ENV{'form.sort'}}; - $p_count = 0; - - foreach my $key( keys %CachData) { - my @Temp=split(/\:/,$CachData{$key}); - if ( $Pos == 0 || $Pos == 11 ) { - ($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]); - } - else { - $Useful = $Temp[$Pos]; - } - $list[$p_count]=$Useful.'&'.$CachData{$key}; - $p_count++; - } - - @list = sort MySort (@list); - - for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) { - my( $Pre, $Post ) = split(/\&/,$list[$nIdx]); - my ($Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES, - $Override,$Wrng,$SD,$Sk,$DoD,$res,$Prob)=split(/\:/,$Post); - $r->print( "\n".''. - "\n".''.($nIdx+1).''. - "\n".''.$Temp.''. - "\n".''.$StdNo.''. - "\n".''.$TotalTries.''. - "\n".''.$MxTries.''. - "\n".''.$Avg.''. - "\n".''.$YES.''. - "\n".''.$Override.''. - "\n".''.$Wrng.''. - "\n".''.$SD.''. - "\n".''.$Sk.''. - "\n".''.$DoD.''. - "\n".''.$res.''. - "\n".'' ); - $GraphDat{$nIdx}=$DoD.':'.$Wrng; - } -} - -# ------------------------------------------- Prepare data for Graphical chart - -sub GetGraphData { - my $Tag = shift; - my $Col; - my $data=''; - my $count = 0; - my $Max = 0; - my $cid=$ENV{'request.course.id'}; - my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}". - "_$ENV{'user.domain'}_$cid\_graph.db"; - foreach (keys %GraphDat) {delete $GraphDat{$_};} - if (-e "$GraphDB") { - if (tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) { - if ( $Tag eq 'DoDiff Graph' ) { - $Tag = 'Degree-of-Difficulty'; - $Col = 0; - } - else { - $Tag = 'Wrong-Percentage'; - $Col = 1; - } - foreach (sort NumericSort keys %GraphDat) { - my @Temp=split(/\:/,$GraphDat{$_}); - my $inf = $Temp[$Col]; - if ( $Max < $inf ) {$Max = $inf;} - $data .= $inf.','; - $count++; - } - untie(%GraphDat); - my $Course = $ENV{'course.'.$cid.'.description'}; - $Course =~ s/\ /"_"/eg; - $GData=$Course.'&'.$Tag.'&'.$Max.'&'.$count.'&'.$data; - - } - else { - $r->print("Unable to tie hash to db file"); - } - } +# update progress +sub Update_PrgWin { + my ($totalStudents,$index,$name,$r)=@_; + $r->print(''); + $r->rflush(); } - -sub initial { -# --------------------------------- Initialize the global varaibles - undef @students; - undef @cols; - undef %maps; - undef %section; - undef %StuBox; - undef @list; - undef %CachData; - undef %GraphDat; - undef %DiscFac; - undef $CurMap; - undef $CurSec; - undef $CurStu; - undef $p_count; - undef $Pos; - undef $GData; +# close Progress Line +sub Close_PrgWin { + my ($r)=@_; + $r->print(''); + $r->rflush(); } -sub ClassList { +sub BuildClasslist { + my ($cacheDB,$students,$studentInformation,$headings,$r)=@_; - &GetStatus(); - - $cid=$ENV{'request.course.id'}; - my $chome=$ENV{'course.'.$cid.'.home'}; - my ($cdom,$cnum)=split(/\_/,$cid); -# ----------------------- Get first and last resource, see if there is anything - $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}}; - $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}}; - if (($firstres) && ($lastres)) { -# ----------------------------------------------------------------- Render page - my $classlst=&Apache::lonnet::reply - ('dump:'.$cdom.':'.$cnum.':classlist',$chome); - my $StudNo = 0; - unless ($classlst=~/^error\:/) { - foreach (sort split(/\&/,$classlst)) { - my ($name,$value)=split(/\=/,$_); - my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value)); - $name=&Apache::lonnet::unescape($name); - my ($sname,$sdom)=split(/\:/,$name); - my $ssec=&Apache::lonnet::usection($sdom,$sname,$cid); - if ($ssec==-1) {next;} - $ssec=($ssec) ? $ssec : '(none)'; - #$ssec=(int($ssec)) ? int($ssec) : $ssec; - #$r->print($sname.'...'.$ssec.'
'); - $section{$ssec}=$ssec; - if ($CurSec eq 'All Sections' || $ssec eq $CurSec) { - $students[$StudNo]=$name; - $StuBox{$sname}=$ssec; - } - $StudNo++; - } - } - else { - $r->print('

Could not access course data

'); - } - $r->print("Total number of students : ".($#students+1)); - $r->rflush(); -# --------------- Find all assessments and put them into some linear-like order - &tracetable($firstres,'&'.$lastres.'&'); - -#my $c=0; -#foreach(@mapsort) { -# $c++; -# $r->print('
'.$mapsort[$c]); -#} -#$r->print('
Count = '.$c); - - } + my %cache; + unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { + return 'Unable to tie database.'; + } + + my $Str=''; + $Str .= '
'."\n"; + $Str .= ''."\n"; + + my $displayString = ''."\n"; + $Str .= &Apache::lonhtmlcommon::CreateHeadings(\%cache, + $studentInformation, + $headings, $displayString); + $Str .= ''."\n"; + + my $alternate=0; + foreach (@$students) { + my ($username, $domain) = split(':', $_); + if($alternate) { + $Str .= ''; + } else { + $Str .= ''; + } + $alternate = ($alternate + 1) % 2; + foreach my $data (@$studentInformation) { + $Str .= ''."\n"; + } } - &MapSecOptions(); -} + $Str .= ''."\n"; + $Str .= '
DISPLAYDATA 
'; + if($data eq 'fullname') { + $Str .= ''; + $Str .= $cache{$_.':'.$data}.' '; + $Str .= ''; + } elsif($data eq 'updateTime') { + $Str .= ''; + $Str .= $cache{$_.':'.$data}.' '; + $Str .= ' '; + } else { + $Str .= $cache{$_.':'.$data}.' '; + } -# ------------------------------------------------------------- End render page - else { - $r->print('

Undefined course sequence

'); + $Str .= '
'."\n"; + $r->print($Str); + $r->rflush(); -sub Menu { - my $InpStr = $ENV{'form.sort'}; - if ( $InpStr eq 'DoDiff Graph' || $InpStr eq '%Wrong Graph' ) { - &GetGraphData($InpStr); - $r->print(''); - } - else { - $r->print('LON-CAPA Statistics'); - - - $r->print(''. - ''. - ''); -# ---------------------------------------------------------------- Course title - $r->print('

Course : "'. - $ENV{'course.'.$ENV{'request.course.id'}. - '.description'}.'"

'.localtime().'

'); -# ------------------------------- This is going to take a while, produce output - $r->rflush(); - - $r->print("\n".'
'); - - my $content = $ENV{'form.sort'}; - if ($content eq '' || $content eq 'Return to Menu') { - my $Ptr = '

'; - $Ptr .= '';#General Statistics"/>'; - $Ptr .= '

'; - $Ptr .= ''; - $Ptr .= '

'; -# $Ptr .= '';#"Problem Evaluation"/>'; - $Ptr .= '

'; - $r->print( $Ptr ); - } - else { - &initial(); - &ClassList(); - if ( $content eq 'Discrimination' || #'Problem Evaluation' || - $content eq 'Recalculate Discrimintion Factor' ) { - &CreateDiscFac(); - } - elsif ( $content eq 'Student Assessment' || - $content eq 'Create Student Report' ) { - &StudentOptions(); - &StudentReport($CurStu,$StuBox{"$CurStu"}); - } - else { - &PreStatTable(); - } - } - $r->print("\n".'
'. - "\n".''. - "\n".''); - $r->rflush(); - } -} + untie(%cache); -sub StudentOptions { - my $OpSel5=''; - $CurStu = $ENV{'form.student'}; - if ( $CurStu eq '' ) { - $CurStu = 'All Students'; - $OpSel5 = 'selected'; - } - my $Ptr =''; -# ----------------------------------- Loading the Students Combobox - $Ptr .= '
Select Student'."\n". - ''; - $Ptr .= '
'; - $r->print( $Ptr ); - $r->rflush(); + return; } -sub GetStatus { +sub CreateMainMenu { + my ($status, $reports)=@_; - $OpSelDis1=''; - $OpSelDis2=''; - $OpSel1=''; - $OpSel2=''; - $OpSel3=''; - $OpSel4=''; - -# if ( $ENV{'form.DisType'} eq 'Total Number of Correct Answers' ) { -# $OpSelDis1='selected'; -# $CurDis=0; -# } -# else { $OpSel2 = 'selected'; $CurDis = 1;} - - if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; } - else { $OpSel1 = 'selected'; } - $CurMap = $ENV{'form.maps'}; - if ( $CurMap eq '' ) { - $CurMap = 'All Maps'; - $OpSel3 = 'selected'; - } - $CurSec = $ENV{'form.section'}; - if ( $CurSec eq '' ) { - $CurSec = 'All Sections'; - $OpSel4 = 'selected'; + my $Str = ''; + + $Str .= ''."\n"; + $Str .= ''."\n"; + $Str .= ''."\n"; + $Str .= ''."\n"; + $Str .= ''."\n"; + $Str .= ''."\n"; + + $Str .= ''."\n"; + + $Str .= '
Analysis Reports:Student Status:
{'reportSelected'} eq $reports->{$_}) { + $Str .= ' selected=""'; + } + $Str .= '>'.$reports->{$_}.''."\n"; } -} + $Str .= ''; + $Str .= &Apache::lonhtmlcommon::StatusOptions($status, 'Statistics'); + $Str .= '
'."\n"; + $Str .= '
'."\n"; + + return $Str; +} + +sub BuildStatistics { + my ($r)=@_; + + my $c = $r->connection; + my @studentInformation=('fullname','section','id','domain','username', + 'updateTime'); + my @headings=('Full Name', 'Section', 'PID', 'Domain', 'User Name', + 'Last Updated'); + my $spacing = ' '; + my %reports = ('classlist' => 'Class list', + 'problem_statistics' => 'Problem Statistics', + 'student_assessment' => 'Student Assessment', + 'activitylog' => 'Activity Log', + 'reportSelected' => 'Class list'); + + my %cache; + my $courseID=$ENV{'request.course.id'}; + my $cacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}". + "_$ENV{'user.domain'}_$courseID\_statistics.db"; + + my ($returnValue, $students) = &PrepareData($c, $cacheDB, + \@studentInformation, + \@headings,$r); + if($returnValue ne 'OK') { + $r->print(''.$returnValue."\n".''); + return OK; + } + + my $GoToPage; + if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { + $GoToPage = $cache{'reportSelected'}; + $reports{'reportSelected'} = $cache{'reportSelected'}; + if(defined($cache{'reportKey'}) && + !exists($reports{$cache{'reportKey'}}) && + $cache{'reportKey'} ne 'false') { + $reports{$cache{'reportKey'}} = $cache{'reportSelected'}; + } + if(defined($cache{'OptionResponses'})) { + $reports{'problem_analysis'} = 'Problem Analysis'; + } -sub MapSecOptions { -# ----------------------------------- Loading the Maps Combobox - my $Ptr = '
'; - $Ptr .= '
'; - $Ptr .= '
Select   Map     '."\n". - ''; - $Ptr .= '   '; - -# ----------------------------------- Loading the Sections Combobox - $Ptr .= '
Select Section'."\n". - ''."\n"; - $r->print( $Ptr ); + $r->print(''."\n"); + $r->print("\n".''."\n".''); $r->rflush(); -} + return OK; +} # ================================================================ Main Handler sub handler { - $r=shift; + my $r=shift; - if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) { -# ------------------------------------------- Set document type for header only - if ($r->header_only) { - if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); - } - else { - $r->content_type('text/html'); - } - $r->send_http_header; - return OK; - } - my $requrl=$r->uri; -# ----------------------------------------------------------------- Tie db file - - undef %hash; +# $jr = $r; - if ($ENV{'request.course.fn'}) { - my $fn=$ENV{'request.course.fn'}; - if (-e "$fn.db") { - if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) { -# ------------------------------------------------------------------- Hash tied - $r->content_type('text/html'); - $r->send_http_header; - &Menu(); - } - else { - $r->content_type('text/html'); - $r->send_http_header; - $r->print('Coursemap undefined.'); - } -# ------------------------------------------------------------------ Untie hash - unless (untie(%hash)) { - &Apache::lonnet::logthis("WARNING: ". - "Could not untie coursemap $fn (browse)."); - } - -# -------------------------------------------------------------------- All done - return OK; -# ----------------------------------------------- Errors, hash could no be tied - } - } - else { - $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; - return HTTP_NOT_ACCEPTABLE; - } - } - else { + unless(&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) { $ENV{'user.error.msg'}= $r->uri.":vgr:0:0:Cannot view grades for complete course"; + return HTTP_NOT_ACCEPTABLE; + } + + # Set document type for header only + if($r->header_only) { + if ($ENV{'browser.mathml'}) { + $r->content_type('text/xml'); + } else { + $r->content_type('text/html'); + } + &Apache::loncommon::no_cache($r); + $r->send_http_header; + return OK; + } + unless($ENV{'request.course.fn'}) { + my $requrl=$r->uri; + $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; return HTTP_NOT_ACCEPTABLE; } + + $r->content_type('text/html'); + $r->send_http_header; + + &BuildStatistics($r); + + return OK; } 1; __END__ - -