--- loncom/interface/statistics/lonproblemstatistics.pm	2004/08/04 15:07:42	1.93
+++ loncom/interface/statistics/lonproblemstatistics.pm	2005/03/04 04:36:35	1.99
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemstatistics.pm,v 1.93 2004/08/04 15:07:42 matthew Exp $
+# $Id: lonproblemstatistics.pm,v 1.99 2005/03/04 04:36:35 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -231,6 +231,17 @@ my @Fields = (
              selectable => 'yes',
              defaultselected => 'yes',
            },
+           { name   => 'tries_per_correct',
+             title  => 'tries/correct',
+             align  => 'right',
+             color  => '#FFDDDD',
+             format => '%4.1f',
+             sortable  => 'yes',
+             graphable => 'yes',
+             long_title => 'Tries per Correct Answer',
+             selectable => 'yes',
+             defaultselected => 'yes',
+           },
            { name   => 'num_wrong',
              title  => '#Wrng',
              align  => 'right',
@@ -320,6 +331,40 @@ my @Fields = (
 #             selectable => 'no',
 #             defaultselected => 'yes',
 #            },
+##   maxtries included for research purposes.  Commented out most of the time.
+#           { name => 'maxtries',
+#             title => 'Maxtries',
+#             align => 'left',
+#             color => '#FFFFFF',
+#             sortable => 'no',
+#             graphable => 'no',
+#             long_title => 'Maximum number of tries',
+#             selectable => 'no',
+#             defaultselected => 'yes',
+#            },
+##   hinttries included for research purposes.  Commented out most of the time.
+#           { name => 'hinttries',
+#             title => 'hinttries',
+#             align => 'left',
+#             color => '#FFFFFF',
+#             sortable => 'no',
+#             graphable => 'no',
+#             long_title => 'Number of tries before a hint appears',
+#             selectable => 'no',
+#             defaultselected => 'yes',
+#            },
+#
+##   problem weight for instructor
+           { name => 'weight',
+             title => 'weight',
+             align => 'right',
+             color => '#FFFFFF',
+             sortable => 'no',
+             graphable => 'no',
+             long_title => 'Problem weight (for instructor)',
+             selectable => 'no',
+             defaultselected => 'yes',
+            },
 );
 
 my @SeqFields = (
@@ -581,16 +626,7 @@ sub CreateInterface {
     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
     $Str .= '</td><td align="center">';
     #
-    my $only_seq_with_assessments = sub { 
-        my $s=shift;
-        if ($s->{'num_assess'} < 1) { 
-            return 0;
-        } else { 
-            return 1;
-        }
-    };
-    $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
-                                              $only_seq_with_assessments);
+    $Str .= &Apache::lonstatistics::map_select('Maps','multiple,all',5);
     $Str .= '</td><td>'.&field_selection_input();
     $Str .= '</td></tr>'."\n";
     $Str .= '</table>'."\n";
@@ -622,8 +658,13 @@ Main interface to problem statistics.
 
 ###############################################
 ###############################################
+my $navmap;
+my @sequences;
+
 sub BuildProblemStatisticsPage {
     my ($r,$c)=@_;
+    undef($navmap);
+    undef(@sequences);
     #
     my %Saveable_Parameters = ('Status' => 'scalar',
                                'statsoutputmode' => 'scalar',
@@ -672,6 +713,13 @@ sub BuildProblemStatisticsPage {
     # it does not slow things down noticably.
     &Apache::loncoursedata::populate_weight_table();
     #
+    ($navmap,@sequences) = 
+        &Apache::lonstatistics::selected_sequences_with_assessments();
+    if (! ref($navmap)) {
+        $r->print('<h1>'.&mt('A course-wide error occured.').'</h1>'.
+                  '<h3>'.$navmap.'</h3>');
+        return;
+    }
     if (exists($ENV{'form.Excel'})) {
         &Excel_output($r);
     } else { 
@@ -679,8 +727,10 @@ sub BuildProblemStatisticsPage {
                   &mt('Produce Excel Output').'" />'.'&nbsp;'x5);
         $r->rflush();
         my $count = 0;
-        foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
-            $count += $seq->{'num_assess_parts'};
+        foreach my $seq (@sequences) {
+            my @resources = 
+                &Apache::lonstathelpers::get_resources($navmap,$seq);
+            $count += scalar(@resources);
         }
         if ($count > 10) {
             $r->print('<h2>'.
@@ -722,9 +772,8 @@ sub output_sequence_statistics {
               '<table border="0" cellpadding="3">'."\n".
               '<tr bgcolor="#FFFFE6">');
     $r->print(&sequence_html_header());
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+    foreach my $seq (@sequences) { 
         last if ($c->aborted);
-        next if ($seq->{'num_assess'} < 1);
         &compute_sequence_statistics($seq);
         $r->print(&sequence_html_output($seq));
     }
@@ -747,10 +796,9 @@ sub output_html_by_sequence {
     my $c = $r->connection();
     $r->print(&html_preamble());
     #
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+    foreach my $seq (@sequences) {
         last if ($c->aborted);
-        next if ($seq->{'num_assess'} < 1);
-        $r->print("<h3>".$seq->{'title'}."</h3>".
+        $r->print("<h3>".$seq->compTitle."</h3>".
                   '<table border="0"><tr><td bgcolor="#777777">'."\n".
                   '<table border="0" cellpadding="3">'."\n".
                   '<tr bgcolor="#FFFFE6">'.
@@ -887,7 +935,7 @@ sub sequence_html_header {
 
 sub sequence_html_output {
     my ($seq) = @_;
-    my $data = $SeqStat{$seq->{'symb'}};
+    my $data = $SeqStat{$seq->symb};
     my $row = '<tr>';
     foreach my $field (@SeqFields) {
         next if ($field->{'selected'} ne 'yes');
@@ -1299,9 +1347,8 @@ sub Excel_output {
     ## 
     &write_headers($excel_sheet,$format,\$rows_output,\$cols_output,
                    \@SeqFields);
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
-        next if ($seq->{'num_assess'} < 1);
-        my $data = $SeqStat{$seq->{'symb'}};
+    foreach my $seq (@sequences) {
+        my $data = $SeqStat{$seq->symb};
         $cols_output=0;
         foreach my $field (@SeqFields) {
             next if ($field->{'selected'} ne 'yes');
@@ -1397,10 +1444,9 @@ sub write_headers {
 sub compute_statistics_on_sequence {
     my ($seq) = @_;
     my @Data;
-    foreach my $res (@{$seq->{'contents'}}) {
-        next if ($res->{'type'} ne 'assessment');
-        foreach my $part (@{$res->{'parts'}}) {
-            next if ($res->{'partdata'}->{$part}->{'Survey'});
+    foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)) {
+        foreach my $part (@{$res->parts}) {
+            next if ($res->is_survey($part));
             #
             # This is where all the work happens
             my $data = &get_statistics($seq,$res,$part,scalar(@StatsArray)+1);
@@ -1418,9 +1464,8 @@ sub compute_all_statistics {
         return;
     }
     my $c = $r->connection;
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+    foreach my $seq (@sequences) {
         last if ($c->aborted);
-        next if ($seq->{'num_assess'} < 1);
         &compute_sequence_statistics($seq);
         &compute_statistics_on_sequence($seq);
     }
@@ -1507,7 +1552,7 @@ sub get_statistics {
     my ($sequence,$resource,$part,$problem_num) = @_;
     #
     my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits();
-    my $symb = $resource->{'symb'};
+    my $symb = $resource->symb;
     my $courseid = $ENV{'request.course.id'};
     #
     my $data = &Apache::loncoursedata::get_problem_statistics
@@ -1517,10 +1562,10 @@ sub get_statistics {
     $data->{'symb'}        = $symb;
     $data->{'part'}        = $part;
     $data->{'problem_num'} = $problem_num;
-    $data->{'container'}   = $sequence->{'title'};
-    $data->{'title'}       = $resource->{'title'};
-    $data->{'title.link'}  = $resource->{'src'}.'?symb='.
-        &Apache::lonnet::escape($resource->{'symb'});
+    $data->{'container'}   = $sequence->compTitle;
+    $data->{'title'}       = $resource->compTitle;
+    $data->{'title.link'}  = $resource->src.'?symb='.
+        &Apache::lonnet::escape($resource->symb);
     #
     if ($SelectedFields{'deg_of_disc'}) {
         $data->{'deg_of_disc'} = 
@@ -1534,7 +1579,7 @@ sub get_statistics {
         $sections =~ s/&+/_/g;  # Ensure no special characters
         $data->{'sections'}=$sections;
         $data->{'course'} = $ENV{'request.course.id'};
-        my $urlres=(&Apache::lonnet::decode_symb($resource->{'symb'}))[2];
+        my $urlres=(&Apache::lonnet::decode_symb($resource->symb))[2];
         $data->{'urlres'}=$urlres;
         my %storestats = 
             &LONCAPA::lonmetadata::dynamic_metadata_storage($data);
@@ -1542,11 +1587,20 @@ sub get_statistics {
         &Apache::lonnet::put('nohist_resevaldata',\%storestats,$dom,$user);
     }
     #
+    $data->{'tries_per_correct'} = $data->{'tries'} / 
+        ($data->{'num_solved'}+0.1);
+    #
     # Get the due date for research purposes (commented out most of the time)
 #    $data->{'duedate'} = 
 #        &Apache::lonnet::EXT('resource.'.$part.'.duedate',$symb);
 #    $data->{'opendate'} = 
 #        &Apache::lonnet::EXT('resource.'.$part.'.opendate',$symb);
+#    $data->{'maxtries'} = 
+#        &Apache::lonnet::EXT('resource.'.$part.'.maxtries',$symb);
+#    $data->{'hinttries'} =
+#        &Apache::lonnet::EXT('resource.'.$part.'.hinttries',$symb);
+    $data->{'weight'} =
+        &Apache::lonnet::EXT('resource.'.$part.'.weight',$symb);
 #    $data->{'resptypes'} = join(',',@{$resource->{'partdata'}->{$part}->{'ResponseTypes'}});
     return $data;
 }
@@ -1567,11 +1621,12 @@ Returns: integer between -1 and 1
 ###############################################
 ###############################################
 sub compute_discrimination_factor {
-    my ($resource,$part,$sequence) = @_;
+    my ($resource,$part,$seq) = @_;
+    my $symb = $resource->symb;
     my @Resources;
-    foreach my $res (@{$sequence->{'contents'}}) {
-        next if ($res->{'symb'} eq $resource->{'symb'});
-        push (@Resources,$res->{'symb'});
+    foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)){
+        next if ($res->symb eq $symb);
+        push (@Resources,$res->symb);
     }
     #
     # rank
@@ -1597,10 +1652,10 @@ sub compute_discrimination_factor {
         return 'nan';
     }
     my ($bottom_sum,$bottom_max) = 
-        &Apache::loncoursedata::get_sum_of_scores($resource,$part,\@BottomSet,
+        &Apache::loncoursedata::get_sum_of_scores($symb,$part,\@BottomSet,
                                                   undef,$starttime,$endtime);
     my ($top_sum,$top_max) = 
-        &Apache::loncoursedata::get_sum_of_scores($resource,$part,\@TopSet,
+        &Apache::loncoursedata::get_sum_of_scores($symb,$part,\@TopSet,
                                                   undef,$starttime,$endtime);
     my $deg_of_disc;
     if ($top_max == 0 || $bottom_max==0) {
@@ -1632,11 +1687,12 @@ sub compute_discrimination_factor {
 ###############################################
 sub compute_sequence_statistics {
     my ($seq) = @_;
-    my $symb = $seq->{'symb'};
+    my $symb = $seq->symb;
     my @Resources;
-    foreach my $res (@{$seq->{'contents'}}) {
-        next if ($res->{'type'} ne 'assessment');
-        push (@Resources,$res->{'symb'});
+    my $part_count;
+    foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)) {
+        push (@Resources,$res->symb);
+        $part_count += scalar(@{$res->parts});
     }
     my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits();
     #
@@ -1646,7 +1702,7 @@ sub compute_sequence_statistics {
                     (\@Apache::lonstatistics::SelectedSections,
                      $Apache::lonstatistics::enrollment_status,
                      \@Resources,$starttime,$endtime,undef);
-    $SeqStat{$symb}->{'title'}  = $seq->{'title'};
+    $SeqStat{$symb}->{'title'}  = $seq->compTitle;
     $SeqStat{$symb}->{'scoremax'}  = $smax;
     $SeqStat{$symb}->{'scoremin'}  = $smin;
     $SeqStat{$symb}->{'scoremean'} = $sMean;
@@ -1661,7 +1717,7 @@ sub compute_sequence_statistics {
         (\@Apache::lonstatistics::SelectedSections,
          $Apache::lonstatistics::enrollment_status,
          \@Resources,$starttime,$endtime,undef);
-    my $K = $seq->{'num_assess_parts'};
+    my $K = $part_count;
     my $kr_21;
     if ($K > 1 && $cSTD > 0) {
         $kr_21 =  ($K/($K-1)) * (1 - $cMean*($K-$cMean)/($K*$cSTD**2));