--- loncom/interface/statistics/lonproblemanalysis.pm	2003/09/29 21:13:23	1.24
+++ loncom/interface/statistics/lonproblemanalysis.pm	2003/10/14 20:20:40	1.36
@@ -1,6 +1,7 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemanalysis.pm,v 1.24 2003/09/29 21:13:23 matthew Exp $
+
+# $Id: lonproblemanalysis.pm,v 1.36 2003/10/14 20:20:40 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -24,16 +25,12 @@
 #
 # http://www.lon-capa.org/
 #
-# (Navigate problems for statistical reports
-# YEAR=2002
-# 5/12,7/26,9/7,11/22 Behrouz Minaei
-#
-###
 
 package Apache::lonproblemanalysis;
 
 use strict;
 use Apache::lonnet();
+use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
 use Apache::lonstatistics;
@@ -42,64 +39,484 @@ use Apache::lonlocal;
 sub BuildProblemAnalysisPage {
     my ($r,$c)=@_;
     $r->print('<h2>'.&mt('Option Response Problem Analysis').'</h2>');
-    if (exists($ENV{'form.problemchoice'})) {
-        # This is me getting around my own cleverness:
-        &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
-                                          undef);
+    $r->print(&CreateInterface());
+    #
+    my @Students = @Apache::lonstatistics::Students;
+    #
+    if (exists($ENV{'form.updatecaches'}) ||
+        (exists($ENV{'form.firstanalysis'}) &&
+         $ENV{'form.firstanalysis'} ne 'no')) {
+        &Apache::lonstatistics::Gather_Full_Student_Data($r);
+    }
+    if (! exists($ENV{'form.firstanalysis'})) {
+        $r->print('<input type="hidden" name="firstanalysis" value="yes" />');
+    } else {
+        $r->print('<input type="hidden" name="firstanalysis" value="no" />');
+    }
+    if (exists($ENV{'form.problemchoice'}) && 
+        ! exists($ENV{'form.SelectAnother'})) {
+        $r->print('<input type="submit" name="ProblemAnalysis" value="'.
+                  &mt('Analyze Problem Again').'" />');
+        $r->print('&nbsp;'x5);
+        $r->print('<input type="submit" name="ClearCache" value="'.
+                  &mt('Clear Caches').'" />');
+        $r->print('&nbsp;'x5);
+        $r->print('<input type="submit" name="updatecaches" value="'.
+                  &mt('Update Student Data').'" />');
+        $r->print('&nbsp;'x5);
+        $r->print('<input type="hidden" name="problemchoice" value="'.
+                  $ENV{'form.problemchoice'}.'" />');
+        $r->print('<input type="submit" name="SelectAnother" value="'.
+                  &mt('Choose a different resource').'" />');
+        $r->print('&nbsp;'x5);
         #
-        my ($symb,$id) = &get_problem_symb(
+        $r->print('<hr />');
+        #
+        my ($symb,$part,$resid) = &get_problem_symb(
                      &Apache::lonnet::unescape($ENV{'form.problemchoice'})
                                            );
-        $r->print('<hr />');
+        #
         my $resource = &get_resource_from_symb($symb);
         if (defined($resource)) {
+            my %Data = &get_problem_data($resource->{'src'});
+            my $ORdata = $Data{$part.'.'.$resid};
+            ##
+            ## Render the problem
+            my $base;
+            ($base,undef) = ($resource->{'src'} =~ m|(.*/)[^/]*$|);
+            $base = "http://".$ENV{'SERVER_NAME'}.$base;
+            my $rendered_problem = 
+                &Apache::lonnet::ssi_body($resource->{'src'});
+            $rendered_problem =~ s/<\s*form\s*/<nop /g;
+            $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
             $r->print('<table bgcolor="ffffff"><tr><td>'.
-                      # Oh this is dumb!  Need to rewrite relative links
-                      # otherwise images (for example) will not show.
-                      &Apache::lonnet::ssi_body($resource->{'src'}).
+                      '<base href="'.$base.'" />'.
+                      $rendered_problem.
                       '</td></tr></table>');
+            ##
+            ## Analyze the problem
+            my $PerformanceData = 
+                &Apache::loncoursedata::get_optionresponse_data
+                                           (\@Students,$symb,$resid);
+            if (defined($PerformanceData) && 
+                ref($PerformanceData) eq 'ARRAY') {
+                if ($ENV{'form.AnalyzeOver'} eq 'Tries') {
+                    my $analysis_html = &tries_analysis($PerformanceData,
+                                                         $ORdata);
+                    $r->print($analysis_html);
+                } elsif ($ENV{'form.AnalyzeOver'} eq 'Time') {
+                    my $analysis_html = &time_analysis($PerformanceData,
+                                                         $ORdata);
+                $r->print($analysis_html);
+                } else {
+                    $r->print('<h2>'.
+                              &mt('The analysis you have selected is '.
+                                         'not supported at this time').
+                              '</h2>');
+                }
+            } else {
+                $r->print('<h2>'.
+                          &mt('There is no student data for this problem.').
+                          '</h2>');
+            }
         } else {
             $r->print('resource is undefined');
         }
-        $r->print('<ol>');
-        $r->print("<li />render problem\n");
-        $r->print("<li />image tag for plot\n");
-        $r->print("<li />plot key\n");
-        $r->print('</ol>');
-        $r->print("<pre>\nProblem choice = $symb $id\n</pre>\n");
         $r->print('<hr />');
+    } else {
+        $r->print('<input type="submit" name="ProblemAnalysis" value="'.
+                  &mt('Analyze Problem').'" />');
+        $r->print('&nbsp;'x5);
+        $r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
+        $r->print(&OptionResponseProblemSelector());
     }
-    $r->print('<input type="hidden" name="analysisfirstcall" value="no" />');
-    $r->print(&CreateInterface());
-    if (! exists($ENV{'form.analysisfirstcall'})) {
-        return;
+}
+
+
+#########################################################
+#########################################################
+##
+##      Misc interface routines use by analysis code
+##
+#########################################################
+#########################################################
+sub build_foil_index {
+    my ($ORdata) = @_;
+    my %Foildata = %{$ORdata->{'Foils'}};
+    my @Foils = sort(keys(%Foildata));
+    my %Concepts;
+    foreach my $foilid (@Foils) {
+        push(@{$Concepts{$Foildata{$foilid}->{'Concept'}}},
+             $foilid);
     }
-    # Okay, they asked for data, so make sure we get the latest data.
-    &Apache::lonnet::logthis('got here for some reason');
-#    &Apache::lonstatistics::Gather_Full_Student_Data($r);
-    $r->print(&OptionResponseProblemSelector());
+    undef(@Foils);
+    # Having gathered the concept information in a hash, we now translate it
+    # into an array because we need to be consistent about order.
+    # Also put the foils in order, too.
+    my $sortfunction = sub {
+        my %Numbers = (one   => 1,
+                       two   => 2,
+                       three => 3,
+                       four  => 4,
+                       five  => 5,
+                       six   => 6,
+                       seven => 7,
+                       eight => 8,
+                       nine  => 9,
+                       ten   => 10,);
+        my $a1 = $a; 
+        my $b1 = $b;
+        if (exists($Numbers{$a})) {
+            $a1 = $Numbers{$a};
+        }
+        if (exists($Numbers{$b})) {
+            $b1 = $Numbers{$b};
+        }
+        $a1 cmp $b1;
+    };
+    my @Concepts;
+    foreach my $concept (sort $sortfunction (keys(%Concepts))) {
+        push(@Concepts,{name => $concept,
+                        foils => [@{$Concepts{$concept}}]});
+        push(@Foils,(@{$Concepts{$concept}}));
+    }
+    #
+    # Build up the table of row labels.
+    my $table = '<table border="1" >'."\n";
+    $table .= '<tr>'.
+        '<th>'.&mt('Concept Number').'</th>'.
+        '<th>'.&mt('Concept').'</th>'.
+        '<th>'.&mt('Foil Number').'</th>'.
+        '<th>'.&mt('Foil Name').'</th>'.
+        '<th>'.&mt('Foil Text').'</th>'.
+        '<th>'.&mt('Correct Value').'</th>'.
+        "</tr>\n";
+    my $conceptindex = 1;
+    my $foilindex = 1;
+    foreach my $concept (@Concepts) {
+        my @FoilsInConcept = @{$concept->{'foils'}};
+        my $firstfoil = shift(@FoilsInConcept);
+        $table .= '<tr>'.
+            '<td>'.$conceptindex.'</td>'.
+            '<td>'.$concept->{'name'}.'</td>'.
+            '<td>'.$foilindex++.'</td>'.
+            '<td>'.$Foildata{$firstfoil}->{'name'}.'</td>'.
+            '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
+            '<td>'.$Foildata{$firstfoil}->{'value'}.'</td>'.
+            "</tr>\n";
+        foreach my $foilid (@FoilsInConcept) {
+            $table .= '<tr>'.
+                '<td></td>'.
+                '<td></td>'.
+                '<td>'.$foilindex.'</td>'.
+                '<td>'.$Foildata{$foilid}->{'name'}.'</td>'.
+                '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
+                '<td>'.$Foildata{$foilid}->{'value'}.'</td>'.
+                "</tr>\n";
+        } continue {
+            $foilindex++;
+        }
+    } continue {
+        $conceptindex++;
+    }
+    $table .= "</table>\n";
+    return ($table,\@Foils,\@Concepts);
 }
 
-sub get_problem_symb {
-    my $problemstring = shift();
-    my ($symb,$id) = ($problemstring=~ /^(.*):([^:]*)$/);
-    return ($symb,$id);
+#########################################################
+#########################################################
+##
+##         Tries Analysis
+##
+#########################################################
+#########################################################
+sub tries_analysis {
+    my ($PerformanceData,$ORdata) = @_;
+    my $mintries = 1;
+    my $maxtries = $ENV{'form.NumPlots'};
+    my %ResponseData = &analyze_option_data_by_tries($PerformanceData,
+                                                     $mintries,$maxtries);
+    my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
+    #
+    # Compute the data neccessary to make the plots
+    my @PlotData;
+    my $xlabel;
+    if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
+        $xlabel = 'Foil Number';
+        foreach my $foilid (@$Foils) {
+            for (my $i=$mintries;$i<=$maxtries;$i++) {
+                #
+                # Gather the per-attempt data
+                my $percent;
+                if ($ResponseData{$foilid}->[$i]->{'total'} == 0) {
+                    $percent = 0;
+                } else {
+                    $percent = $ResponseData{$foilid}->[$i]->{'correct'} /
+                        $ResponseData{$foilid}->[$i]->{'total'};
+                }
+                push (@{$PlotData[$i]->{'total'}},
+                                 $ResponseData{$foilid}->[$i]->{'total'});
+                push (@{$PlotData[$i]->{'good'}},100 * $percent);
+                push (@{$PlotData[$i]->{'bad'}}, 100 *(1-$percent));
+            }
+        }
+    } else {
+        # Concept analysis
+        $xlabel = 'Concept Number';
+        foreach my $concept (@$Concepts) {
+            for (my $i=$mintries;$i<=$maxtries;$i++) {
+                #
+                # Gather the per-attempt data
+                my ($correct,$incorrect,$total);
+                foreach my $foil (@{$concept->{'foils'}}) {
+                    $correct   += $ResponseData{$foil}->[$i]->{'correct'};
+                    $incorrect += $ResponseData{$foil}->[$i]->{'incorrect'};
+                    $total     += $ResponseData{$foil}->[$i]->{'total'};
+                }
+                push (@{$PlotData[$i]->{'correct'}},  $correct);
+                push (@{$PlotData[$i]->{'incorrect'}},$incorrect);
+                push (@{$PlotData[$i]->{'total'}},    $total);
+                my $percent;
+                if ($total == 0) {
+                    $percent = 0;
+                } else {
+                    $percent = $correct/$total;
+                }
+                push (@{$PlotData[$i]->{'good'}},100*$percent);
+                push (@{$PlotData[$i]->{'bad'}},100*(1-$percent));
+            }
+        }
+    }
+    # 
+    # Build a table for the plots
+    $table .= "<table>\n";
+    my @Plots;
+    for (my $i=$mintries;$i<=$maxtries;$i++) {
+        my $minstu = $PlotData[$i]->{'total'}->[0];
+        my $maxstu = $PlotData[$i]->{'total'}->[0];
+        foreach my $count (@{$PlotData[$i]->{'total'}}) {
+            if ($minstu > $count) {
+                $minstu = $count;
+            }
+            if ($maxstu < $count) {
+                $maxstu = $count;
+            }
+        }
+        $maxstu = 0 if (! $maxstu);
+        $minstu = 0 if (! $minstu);
+        my $title;
+        if ($maxstu == $minstu) {
+            $title = 'Attempt '.$i.', '.$maxstu.' students';
+        } else {
+            $title = 'Attempt '.$i.', '.$minstu.'-'.$maxstu.' students';
+        }
+        my $graphlink = &Apache::loncommon::DrawGraph($title,
+                                                      $xlabel,
+                                                      'Percent Correct',
+                                                      100,
+                                                      $PlotData[$i]->{'good'},
+                                                      $PlotData[$i]->{'bad'});
+        push(@Plots,$graphlink);
+    }
+    #
+    # Should this be something the user can set?  Too many dialogs!
+    my $plots_per_row = 2;
+    while (my $plotlink = shift(@Plots)) {
+        $table .= '<tr><td>'.$plotlink.'</td>';
+        for (my $i=1;$i<$plots_per_row;$i++) {
+            if ($plotlink = shift(@Plots)) {
+                $table .= '<td>'.$plotlink.'</td>';
+            } else {
+                $table .= '<td></td>';
+            }
+        }
+        $table .= "</tr>\n";
+    }
+    $table .= "</table>\n";
+    return ($table);
 }
 
+sub analyze_option_data_by_tries {
+    my ($PerformanceData,$mintries,$maxtries) = @_;
+    my %Trydata;
+    $mintries = 1         if (! defined($mintries) || $mintries < 1);
+    $maxtries = $mintries if (! defined($maxtries) || $maxtries < $mintries);
+    foreach my $row (@$PerformanceData) {
+        next if (! defined($row));
+        my ($grading,$submission,$time,$tries) = @$row;
+        my @Foilgrades = split('&',$grading);
+        my @Foilsubs   = split('&',$submission);
+        for (my $numtries = 1; $numtries <= $maxtries; $numtries++) {
+            if ($tries == $numtries) {
+                foreach my $foilgrade (@Foilgrades) {
+                    my ($foilid,$correct) = split('=',$foilgrade);
+                    if ($correct) {
+                        $Trydata{$foilid}->[$numtries]->{'correct'}++;
+                    } else {
+                        $Trydata{$foilid}->[$numtries]->{'incorrect'}++;
+                    }                        
+                }
+            }
+        }
+    }
+    foreach my $foilid (keys(%Trydata)) {
+        foreach my $tryhash (@{$Trydata{$foilid}}) {
+            next if ((! exists($tryhash->{'correct'}) && 
+                      ! exists($tryhash->{'incorrect'})) ||
+                     ($tryhash->{'correct'} < 1 &&
+                      $tryhash->{'incorrect'} < 1));
+            $tryhash->{'total'} = $tryhash->{'correct'} + 
+                $tryhash->{'incorrect'};
+        }
+    }
+    return %Trydata;
+}
+
+#########################################################
+#########################################################
+##
+##                 Time Analysis
+##
+#########################################################
+#########################################################
+sub time_analysis {
+    my ($PerformanceData,$ORdata) = @_;
+    my $num_plots = $ENV{'form.NumPlots'};
+    my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
+    my $num_data = scalar(@$PerformanceData)-1;
+    my $percent = sprintf('%2f',100/$num_plots);
+    for (my $i=0;$i<$num_plots;$i++) {
+        my $starttime = &Apache::lonhtmlcommon::get_date_from_form
+            ('startdate_'.$i);
+        my $endtime = &Apache::lonhtmlcommon::get_date_from_form
+            ('enddate_'.$i);
+        my ($begin_index,$end_index,$plottitle,$plothtml,$data);
+        if (! defined($starttime) || ! defined($endtime)) {
+            $begin_index = $i*int($num_data/$num_plots);
+            $end_index = ($i+1)*int($num_data/$num_plots);
+            my $lownum  = sprintf('%2.1f',$i*$percent);
+            $lownum =~ s/(\.0)$//;
+            my $highnum = sprintf('%2.1f',($i+1)*$percent);
+            $highnum =~ s/(\.0)$//;
+            $plottitle = $lownum.'% to '.$highnum.'% of submissions';
+        } else {
+            my $j;
+            while (++$j < scalar(@$PerformanceData)) {
+                last if ($PerformanceData->[$j]->[2] > $starttime);
+            }
+            $begin_index = $j;
+            while (++$j < scalar(@$PerformanceData)) {
+                last if ($PerformanceData->[$j]->[2] > $endtime);
+            }
+            $end_index = $j;
+            $plottitle = 'Tries plot '.($i+1);
+        }
+        ($plothtml,$starttime,$endtime,$data) = 
+            &analyze_option_data_by_time($PerformanceData,
+                                         $begin_index,$end_index,
+                                         $plottitle,
+                                         @$Foils);
+        my $startdateform = &Apache::lonhtmlcommon::date_setter
+            ('Statistics','startdate_'.$i,$starttime);
+        my $enddateform = &Apache::lonhtmlcommon::date_setter
+            ('Statistics','enddate_'.$i,$endtime);
+        $plothtml.= "<br />\n".
+            "<b>Start Time</b>: "."&nbsp;".$startdateform."<br />\n".
+            "<b>End Time</b>&nbsp;&nbsp;: "."&nbsp;".$enddateform."<br />\n";
+        $table.=$plothtml;
+    }
+    return $table;
+}
+
+sub analyze_option_data_by_time {
+    my ($PerformanceData,$begin_index,$end_index,$description,@Foils) = @_;
+    my %TimeData;
+    #
+    # Get the start and end times for this segment of the plot
+    my $starttime = $PerformanceData->[$begin_index]->[2];
+    my $endtime   = $PerformanceData->[$end_index  ]->[2];
+    #
+    # Compute the number getting the foils correct or incorrects
+    for (my $i=$begin_index;$i<=$end_index;$i++) {
+        my $row = $PerformanceData->[$i];
+        next if (! defined($row));
+        my ($grading,$submission,$time,$tries) = @$row;
+        my @Foilgrades = split('&',$grading);
+        my @Foilsubs   = split('&',$submission);
+        foreach my $foilgrade (@Foilgrades) {
+            my ($foilid,$correct) = split('=',$foilgrade);
+            if ($correct) {
+                $TimeData{$foilid}->{'correct'}++;
+            } else {
+                $TimeData{$foilid}->{'incorrect'}++;
+            }
+        }
+    }
+    #
+    # Compute the total and percent correct
+    my @Plotdata1;
+    my @Plotdata2;
+    foreach my $foilid (@Foils) {
+        if (! exists($TimeData{$foilid}->{'correct'})) {
+            $TimeData{$foilid}->{'correct'} = 0;
+        }
+        if (! exists($TimeData{$foilid}->{'incorrect'})) {
+            $TimeData{$foilid}->{'incorrect'} = 0;
+        }
+        $TimeData{$foilid}->{'total'} = $TimeData{$foilid}->{'correct'} +
+                                $TimeData{$foilid}->{'incorrect'};
+        $TimeData{$foilid}->{'percent_corr'} = 100 *
+            $TimeData{$foilid}->{'correct'} / 
+            $TimeData{$foilid}->{'total'};
+        push (@Plotdata1,    $TimeData{$foilid}->{'percent_corr'});
+        push (@Plotdata2,100-$TimeData{$foilid}->{'percent_corr'});
+    }
+    #
+    # Create the plot
+    my $graphlink = &Apache::loncommon::DrawGraph
+        ($description,#'Time Interval Analysis',
+         'Foil Number',
+         'Percent Correct / Incorrect',
+         100,
+         \@Plotdata1,\@Plotdata2);
+    #
+    return ($graphlink,$starttime,$endtime,\%TimeData);
+}
+
+#########################################################
+#########################################################
+##
+##             Interface 
+##
+#########################################################
+#########################################################
 sub CreateInterface {
+    ##
+    ## Environment variable initialization
+    if (! exists$ENV{'form.AnalyzeOver'}) {
+        $ENV{'form.AnalyzeOver'} = 'Tries';
+    }
+    ##
+    ## Build the menu
     my $Str = '';
     $Str .= '<table cellspacing="5">'."\n";
     $Str .= '<tr>';
     $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
     $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
+#    $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
+    $Str .= '<td align="center">&nbsp;</td>';
     $Str .= '</tr>'."\n";
-    #
+    ##
+    ## 
     $Str .= '<tr><td align="center">'."\n";
     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
-    $Str .= '</td><td align="center">';
+    $Str .= '</td>';
+    #
+    $Str .= '<td align="center">';
     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
-    $Str .= '</td><td align="center">';
+    $Str .= '</td>';
+    #
+#    $Str .= '<td align="center">';
     my $only_seq_with_assessments = sub { 
         my $s=shift;
         if ($s->{'num_assess'} < 1) { 
@@ -108,16 +525,63 @@ sub CreateInterface {
             return 1;
         }
     };
-    $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
+    &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
                                               $only_seq_with_assessments);
-    $Str .= '</td></tr>'."\n";
+    ##
+    ##
+    $Str .= '<td>';
+    { # These braces are here to organize the code, not scope it.
+        {
+            $Str .= '<nobr>'.&mt('Analyze Over ');
+            $Str .='<select name="AnalyzeOver" >';
+            $Str .= '<option value="Tries" ';
+            if (! exists($ENV{'form.AnalyzeOver'}) || 
+                $ENV{'form.AnalyzeOver'} eq 'Tries'){
+                # Default to Tries
+                $Str .= ' selected ';
+            }
+            $Str .= '>'.&mt('Tries').'</option>';
+            $Str .= '<option value="Time" ';
+            $Str .= ' selected ' if ($ENV{'form.AnalyzeOver'} eq 'Time');
+            $Str .= '>'.&mt('Time').'</option>';
+            $Str .= '</select></nobr><br />';
+        }
+        {
+            $Str .= '<nobr>'.&mt('Analyze as ');
+            $Str .='<select name="AnalyzeAs" >';
+            $Str .= '<option value="Concepts" ';
+            if (! exists($ENV{'form.AnalyzeAs'}) || 
+                $ENV{'form.AnalyzeAs'} eq 'Concepts'){
+                # Default to Concepts
+                $Str .= ' selected ';
+            }
+            $Str .= '>'.&mt('Concepts').'</option>';
+            $Str .= '<option value="Foils" ';
+            $Str .= ' selected ' if ($ENV{'form.AnalyzeAs'} eq 'Foils');
+            $Str .= '>'.&mt('Foils').'</option>';
+            $Str .= '</select></nobr><br />';
+        }
+        {
+            $Str .= '<br /><nobr>'.&mt('Number of Plots:');
+            $Str .= '<select name="NumPlots">';
+            if (! exists($ENV{'form.NumPlots'}) 
+                || $ENV{'form.NumPlots'} < 1 
+                || $ENV{'form.NumPlots'} > 20) {
+                $ENV{'form.NumPlots'} = 5;
+            }
+            foreach my $i (1,2,3,4,5,6,7,8,10,15,20) {
+                $Str .= '<option value="'.$i.'" ';
+                if ($ENV{'form.NumPlots'} == $i) { $Str.=' selected '; }
+                $Str .= '>'.$i.'</option>';
+            }
+            $Str .= '</select></nobr>';
+        }
+    }
+    $Str .= '</td>';
+    ##
+    ##
+    $Str .= '</tr>'."\n";
     $Str .= '</table>'."\n";
-    $Str .= '<input type="submit" name="ProblemAnalysis" value="'.
-        &mt('Analyze Problem').'" />';
-    $Str .= '&nbsp;'x5;
-    $Str .= '<input type="submit" name="ClearCache" value="'.
-        &mt('Clear Caches').'" />';
-    $Str .= '&nbsp;'x5;
     return ($Str);
 }
 
@@ -129,7 +593,7 @@ sub OptionResponseProblemSelector {
         my $seq_str = '';
         foreach my $res (@{$seq->{'contents'}}) {
 #            &Apache::lonnet::logthis('checking '.$res->{'title'});
-#            next if ($res->{'type'} ne 'assessment');
+            next if ($res->{'type'} ne 'assessment');
             foreach my $part (@{$res->{'parts'}}) {
                 my $partdata = $res->{'partdata'}->{$part};
                 if (! exists($partdata->{'option'}) || 
@@ -140,7 +604,7 @@ sub OptionResponseProblemSelector {
                     my $respid = $partdata->{'ResponseIds'}->[$i];
                     my $resptype = $partdata->{'ResponseTypes'}->[$i];
                     if ($resptype eq 'option') {
-                        my $value = &Apache::lonnet::escape($res->{'symb'}.':'.$respid);
+                        my $value = &Apache::lonnet::escape($res->{'symb'}.':'.$part.':'.$respid);
                         my $checked = '';
                         if ($ENV{'form.problemchoice'} eq $value) {
                             $checked = 'checked ';
@@ -166,12 +630,23 @@ sub OptionResponseProblemSelector {
     return $Str;
 }
 
+#########################################################
+#########################################################
+##
+##              Misc functions
+##
+#########################################################
+#########################################################
+sub get_problem_symb {
+    my $problemstring = shift();
+    my ($symb,$partid,$resid) = ($problemstring=~ /^(.*):([^:]*):([^:]*)$/);
+    return ($symb,$partid,$resid);
+}
+
 sub get_resource_from_symb {
     my ($symb) = @_;
-    &Apache::lonnet::logthis('target symb = :'.$symb.':');
     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
         foreach my $res (@{$seq->{'contents'}}) {
-            &Apache::lonnet::logthis('symb = :'.$res->{'symb'}.':');
             if ($res->{'symb'} eq $symb) {
                 return $res;
             }
@@ -180,46 +655,77 @@ sub get_resource_from_symb {
     return undef;
 }
 
-=pod
-
-sub InitAnalysis {
-    my ($resource,$sname,$sdom)=@_;
-    my $symb = $resource->
-    my $URI = $hash{'src_'.$rid};
-
-    my $Answ=&Apache::lonnet::ssi($URI,('grade_target' => 'analyze',
-                                  'grade_username' => $sname,
-                                  'grade_domain' => $sdom,
-                                  'grade_courseid' => $cid,
-                                  'grade_symb' => $symb));
-#    my $Answ=&Apache::lonnet::ssi($URI,('grade_target' => 'analyze'));
-
+sub get_problem_data {
+    my ($url) = @_;
+#    my $Answ=&Apache::lonnet::ssi($URI,('grade_target' => 'analyze',
+#                                  'grade_username' => $sname,
+#                                  'grade_domain' => $sdom,
+#                                  'grade_courseid' => $cid,
+#                                  'grade_symb' => $symb));
+    my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
     (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
-    %Answer=();
+    my %Answer;
     %Answer=&Apache::lonnet::str2hash($Answ);
-
-    my $parts='';
-    foreach my $elm (@{$Answer{"parts"}}) {
-        $parts.="$elm,";
-    }
-    chop($parts);
-    my $conc='';
-    foreach my $elm (@{$Answer{"$parts.concepts"}}) {
-        $conc.="$elm@";
-    }
-    chop($conc);
-
-    @Concepts=split(/\@/,$conc);
-    foreach my $concept (@{$Answer{"$parts.concepts"}}) {
-        foreach my $foil (@{$Answer{"$parts.concept.$concept"}}) {
-            $foil_to_concept{$foil} = $concept;
-            #$ConceptData{$foil} = $Answer{"$parts.foil.value.$foil"};
+#    &Apache::lonnet::logthis('keys of %Answer = '.join(', ',(keys(%Answer))));
+#    &Apache::lonnet::logthis('$Answer{parts} = '.
+#                             join(', ',@{$Answer{'parts'}}));
+    my %Partdata;
+    foreach my $part (@{$Answer{'parts'}}) {
+        while (my($key,$value) = each(%Answer)) {
+            next if ($key !~ /^$part/);
+            $key =~ s/^$part\.//;
+            if (ref($value) eq 'ARRAY') {
+                if ($key eq 'options') {
+                    $Partdata{$part}->{'Options'}=$value;
+                    &Apache::lonnet::logthis('Options = '.join(', ',@$value));
+                } elsif ($key eq 'concepts') {
+                    $Partdata{$part}->{'Concepts'}=$value;
+                } elsif ($key =~ /^concept\.(.*)$/) {
+                    my $concept = $1;
+                    foreach my $foil (@$value) {
+                        $Partdata{$part}->{'Foils'}->{$foil}->{'Concept'}=
+                                                                      $concept;
+                    }
+                }
+ #               &Apache::lonnet::logthis($part.' '.$key.' (array) = '.
+ #                                        join(', ',@$value));
+            } else {
+                $value =~ s/^\s*//g;
+                $value =~ s/\s*$//g;
+                if ($key=~ /^foil\.text\.(.*)$/) {
+                    my $foil = $1;
+                    $Partdata{$part}->{'Foils'}->{$foil}->{'name'}=$foil;
+                    $Partdata{$part}->{'Foils'}->{$foil}->{'text'}=$value;
+                } elsif ($key =~ /^foil\.value\.(.*)$/) {
+                    my $foil = $1;
+                    $Partdata{$part}->{'Foils'}->{$foil}->{'value'}=$value;
+                }
+                # &Apache::lonnet::logthis($part.' '.$key.' = '.$value);
+            }
         }
     }
-    return $symb;
-}
 
-=cut
+#    my $parts='';
+#    foreach my $elm (@{$Answer{"parts"}}) {
+#        $parts.="$elm,";
+#    }
+#    chop($parts);
+#    my $conc='';
+#    foreach my $elm (@{$Answer{"$parts.concepts"}}) {
+#        $conc.="$elm@";
+#    }
+#    chop($conc);
+#
+#    @Concepts=split(/\@/,$conc);
+#    foreach my $concept (@{$Answer{"$parts.concepts"}}) {
+#        foreach my $foil (@{$Answer{"$parts.concept.$concept"}}) {
+#            $foil_to_concept{$foil} = $concept;
+#            #$ConceptData{$foil} = $Answer{"$parts.foil.value.$foil"};
+#        }
+#    }
+#    return $symb;
+    return %Partdata;
+}
 
 1;