--- loncom/interface/statistics/lonstudentassessment.pm	2002/11/08 22:16:47	1.18
+++ loncom/interface/statistics/lonstudentassessment.pm	2004/01/27 16:58:05	1.81
@@ -1,7 +1,6 @@
 # The LearningOnline Network with CAPA
-# (Publication Handler
 #
-# $Id: lonstudentassessment.pm,v 1.18 2002/11/08 22:16:47 matthew Exp $
+# $Id: lonstudentassessment.pm,v 1.81 2004/01/27 16:58:05 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,695 +24,1700 @@
 # http://www.lon-capa.org/
 #
 # (Navigate problems for statistical reports
-# YEAR=2001
-# 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
-# 1/22,2/1,2/6,2/25,3/2,3/6,3/17,3/21,3/22,3/26,4/7,5/6 Behrouz Minaei
-# 5/12,5/14,5/15,5/19,5/26,7/16  Behrouz Minaei
 #
-###
+#######################################################
+#######################################################
 
-package Apache::lonstudentassessment; 
+=pod
+
+=head1 NAME
+
+lonstudentassessment
+
+=head1 SYNOPSIS
+
+Presents assessment data about a student or a group of students.
+
+=head1 Subroutines
+
+=over 4 
+
+=cut
+
+#######################################################
+#######################################################
+
+package Apache::lonstudentassessment;
 
 use strict;
+use Apache::lonstatistics;
 use Apache::lonhtmlcommon;
+use Apache::loncommon();
 use Apache::loncoursedata;
-use GDBM_File;
+use Apache::lonnet; # for logging porpoises
+use Apache::lonlocal;
+use Spreadsheet::WriteExcel;
+use Spreadsheet::WriteExcel::Utility();
+
+#######################################################
+#######################################################
+=pod
+
+=item Package Variables
+
+=over 4
+
+=item $Statistics Hash ref to store student data.  Indexed by symb,
+      contains hashes with keys 'score' and 'max'.
+
+=cut
+
+#######################################################
+#######################################################
+
+my $Statistics;
 
-#my $jr;
+#######################################################
+#######################################################
+
+=pod
+
+=item $show_links 'yes' or 'no' for linking to student performance data
+
+=item $output_mode 'html', 'excel', or 'csv' for output mode
+
+=item $show 'all', 'totals', or 'scores' determines how much data is output
+
+=item $data  determines what performance data is shown
+
+=item $datadescription A short description of the output data selected.
+
+=item $base 'tries' or 'scores' determines the base of the performance shown
+
+=item $single_student_mode evaluates to true if we are showing only one
+student.
+
+=cut
+
+#######################################################
+#######################################################
+my $show_links;
+my $output_mode;
+my $data;
+my $base;
+my $datadescription;
+my $single_student_mode;
+
+#######################################################
+#######################################################
+# End of package variable declarations
+
+=pod
+
+=back
+
+=cut
+
+#######################################################
+#######################################################
+
+=pod
 
+=item &BuildStudentAssessmentPage()
+
+Inputs: 
+
+=over 4
+
+=item $r Apache Request
+
+=item $c Apache Connection 
+
+=back
+
+=cut
+
+#######################################################
+#######################################################
 sub BuildStudentAssessmentPage {
-    my ($cacheDB,$students,$courseID,$formName,$headings,$spacing,
-        $studentInformation,$r,$c)=@_;
-#    $jr = $r;
-    my %cache;
-    unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
-        $r->print('<html><body>Unable to tie database.</body></html>');
+    my ($r,$c)=@_;
+    #
+    undef($Statistics);
+    undef($show_links);
+    undef($output_mode);
+    undef($data);
+    undef($base);
+    undef($datadescription);
+    undef($single_student_mode);
+    #
+    my %Saveable_Parameters = ('Status' => 'scalar',
+                               'chartoutputmode' => 'scalar',
+                               'chartoutputdata' => 'scalar',
+                               'Section' => 'array',
+                               'StudentData' => 'array',
+                               'Maps' => 'array');
+    &Apache::loncommon::store_course_settings('chart',\%Saveable_Parameters);
+    &Apache::loncommon::restore_course_settings('chart',\%Saveable_Parameters);
+    #
+    &Apache::lonstatistics::PrepareClasslist();
+    #
+    $single_student_mode = 0;
+    $single_student_mode = 1 if ($ENV{'form.SelectedStudent'});
+    if ($ENV{'form.selectstudent'}) {
+        &Apache::lonstatistics::DisplayClasslist($r);
         return;
     }
-
-    # Remove students who don't have the proper section.
-    my @sectionsSelected = split(':',$cache{'sectionsSelected'});
-    for(my $studentIndex=((scalar @$students)-1); $studentIndex>=0;
-        $studentIndex--) {
-        my $value = $cache{$students->[$studentIndex].':section'};
-        my $found = 0;
-        foreach (@sectionsSelected) {
-            if($_ eq 'none') {
-                if($value eq '' || !defined($value) || $value eq ' ') {
-                    $found = 1;
-                    last;
-                }
-            } else {
-                if($value eq $_) {
-                    $found = 1;
-                    last;
-                }
-            }
-        }
-        if($found == 0) {
-            splice(@$students, $studentIndex, 1);
+    #
+    # Print out the HTML headers for the interface
+    #    This also parses the output mode selector
+    #    This step must *always* be done.
+    $r->print(&CreateInterface());
+    $r->print('<input type="hidden" name="notfirstrun" value="true" />');
+    $r->print('<input type="hidden" name="sort" value="'.
+              $ENV{'form.sort'}.'" />');
+    $r->rflush();
+    #
+    if (! exists($ENV{'form.notfirstrun'}) && ! $single_student_mode) {
+        return;
+    }
+    #
+    my $initialize     = \&html_initialize;
+    my $output_student = \&html_outputstudent;
+    my $finish         = \&html_finish;
+    #
+    if ($output_mode eq 'excel') {
+        $initialize     = \&excel_initialize;
+        $output_student = \&excel_outputstudent;
+        $finish         = \&excel_finish;
+    } elsif ($output_mode eq 'csv') {
+        $initialize     = \&csv_initialize;
+        $output_student = \&csv_outputstudent;
+        $finish         = \&csv_finish;
+    }
+    #
+    if($c->aborted()) {  return ; }
+    #
+    # Determine which students we want to look at
+    my @Students;
+    if ($single_student_mode) {
+        @Students = (&Apache::lonstatistics::current_student());
+        $r->print(&next_and_previous_buttons());
+        $r->rflush();
+    } else {
+        @Students = @Apache::lonstatistics::Students;
+    }
+    #
+    # Perform generic initialization tasks
+    #       Since we use lonnet::EXT to retrieve problem weights,
+    #       to ensure current data we must clear the caches out.
+    #       This makes sure that parameter changes at the student level
+    #       are immediately reflected in the chart.
+    &Apache::lonnet::clear_EXT_cache_status();
+    #
+    # Clean out loncoursedata's package data, just to be safe.
+    &Apache::loncoursedata::clear_internal_caches();
+    #
+    # Call the initialize routine selected above
+    $initialize->($r);
+    foreach my $student (@Students) {
+        if($c->aborted()) { 
+            $finish->($r);
+            return ; 
         }
+        # Call the output_student routine selected above
+        $output_student->($r,$student);
     }
-    my ($infoHeadings, $infoKeys, $sequenceHeadings, $sequenceKeys,
-        $doNotShow) = 
-        &ShouldShowColumns(\%cache, $headings, $studentInformation);
-
-    my $selectedName = &FindSelectedStudent(\%cache, 
-                                            $cache{'StudentAssessmentStudent'},
-                                            $students);
-    $r->print(&CreateInterface(\%cache, $selectedName, $students, $formName,
-                               $doNotShow));
-    $r->rflush();
+    # Call the "finish" routine selected above
+    $finish->($r);
+    #
+    return;
+}
 
+#######################################################
+#######################################################
+sub next_and_previous_buttons {
     my $Str = '';
-    if($selectedName eq 'No Student Selected') {
-	$Str .= '<h3><font color=blue>WARNING: ';
-        $Str .= 'Please select a student</font></h3>';
-        $r->print($Str);
-        return;
+    $Str .= '<input type="hidden" name="SelectedStudent" value="'.
+        $ENV{'form.SelectedStudent'}.'" />';
+    #
+    # Build the previous student link
+    my $previous = &Apache::lonstatistics::previous_student();
+    my $previousbutton = '';
+    if (defined($previous)) {
+        my $sname = $previous->{'username'}.':'.$previous->{'domain'};
+        $previousbutton .= '<input type="button" value="'.
+            'Previous Student ('.
+            $previous->{'username'}.'@'.$previous->{'domain'}.')'.
+            '" onclick="document.Statistics.SelectedStudent.value='.
+            "'".$sname."'".';'.
+            'document.Statistics.submit();" />';
+    } else {
+        $previousbutton .= '<input type="button" value="'.
+            'Previous student (none)'.'" />';
+    }
+    #
+    # Build the next student link
+    my $next = &Apache::lonstatistics::next_student();
+    my $nextbutton = '';
+    if (defined($next)) {
+        my $sname = $next->{'username'}.':'.$next->{'domain'};
+        $nextbutton .= '<input type="button" value="'.
+            'Next Student ('.
+            $next->{'username'}.'@'.$next->{'domain'}.')'.
+            '" onclick="document.Statistics.SelectedStudent.value='.
+            "'".$sname."'".';'.
+            'document.Statistics.submit();" />';
+    } else {
+        $nextbutton .= '<input type="button" value="'.
+            'Next student (none)'.'" />';
     }
+    #
+    # Build the 'all students' button
+    my $all = '';
+    $all .= '<input type="button" value="All Students" '.
+            '" onclick="document.Statistics.SelectedStudent.value='.
+            "''".';'.'document.Statistics.submit();" />';
+    $Str .= $previousbutton.('&nbsp;'x5).$all.('&nbsp;'x5).$nextbutton;
+    return $Str;
+}
 
-    $r->print(&CreateTableHeadings(\%cache, $spacing, $infoKeys, $infoHeadings,
-                                   $sequenceKeys, $sequenceHeadings));
-    untie(%cache);
-    if($c->aborted()) {  return $Str; }
-
-    my $selected=0;
-    $r->print('<pre>'."\n");
-    foreach (@$students) {
-        if($c->aborted()) { return $Str; }
-        next if ($_ ne $selectedName &&
-                 $selectedName ne 'All Students');
-        $selected = 1;
-
-        my @who = ($_);
-        next if(&Apache::loncoursedata::DownloadStudentCourseData(\@who, 'true',
-                                                             $cacheDB, 'true',
-                                                             'false', $courseID,
-                                                             $r, $c) ne 'OK');
-        next if($c->aborted());
-
-        if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
-            my @before=();
-            my @after=();
-            my @updateColumn=();
-            my $foundUpdate = 0;
-            foreach(@$infoKeys) {
-                if(/updateTime/) {
-                    $foundUpdate=1;
-                    push(@updateColumn, $_);
-                    next;
-                }
-                if($foundUpdate) {
-                    push(@after, $_);
-                } else {
-                    push(@before, $_);
-                }
-            }
-            my $displayString = 'DISPLAYDATA'.$spacing;
-            $r->print(&Apache::lonhtmlcommon::FormatStudentInformation(
-                                                         \%cache, $_,
-                                                         \@before,
-                                                         $displayString,
-                                                         'preformatted'));
-
-            if($foundUpdate) {
-                $displayString = '';
-                $displayString .= '<a href="/adm/statistics?reportSelected=';
-                $displayString .= &Apache::lonnet::escape('Student Assessment');
-                $displayString .= '&download='.$_.'">';
-                $displayString .= 'DISPLAYDATA</a>'.$spacing;
-                $r->print(&Apache::lonhtmlcommon::FormatStudentInformation(
-                                                                   \%cache, $_,
-                                                                   \@updateColumn,
-                                                                   $displayString,
-                                                                   'preformatted'));
-            }
-
-            $displayString = 'DISPLAYDATA'.$spacing;
-            $r->print(&Apache::lonhtmlcommon::FormatStudentInformation(
-                                                         \%cache, $_,
-                                                         \@after,
-                                                         $displayString,
-                                                         'preformatted'));
-            $r->print(&StudentReport(\%cache, $_, $spacing, $sequenceKeys));
-            $r->print("\n");
-            $r->rflush();
-            untie(%cache);
+#######################################################
+#######################################################
+
+sub get_student_fields_to_show {
+    my @to_show = @Apache::lonstatistics::SelectedStudentData;
+    foreach (@to_show) {
+        if ($_ eq 'all') {
+            @to_show = @Apache::lonstatistics::StudentDataOrder;
+            last;
         }
     }
+    return @to_show;
+}
 
+#######################################################
+#######################################################
 
-#    $r->print("AverageTtal");
-    $r->print(&StudentAverageTotal(\%cache, $spacing, $sequenceKeys));
-    $r->print("\n");
-    $r->rflush();
-    untie(%cache);
+=pod
 
+=item &CreateInterface()
 
-    $r->print('</pre>'."\n");
-    if($selected == 0) {
-	$Str .= '<h3><font color=blue>WARNING: ';
-        $Str .= 'Please select a student</font></h3>';
-        $r->print($Str);
-    }
+Called by &BuildStudentAssessmentPage to create the top part of the
+page which displays the chart.
 
-    return;
-}
+Inputs: None
 
-#---- Student Assessment Web Page --------------------------------------------
+Returns:  A string containing the HTML for the headers and top table for 
+the chart page.
 
-sub CreateInterface {
-    my($cache,$selectedName,$students,$formName,$doNotShow)=@_;
+=cut
 
+#######################################################
+#######################################################
+sub CreateInterface {
     my $Str = '';
-    $Str .= &CreateLegend();
-    $Str .= '<table><tr><td>'."\n";
-    $Str .= '<input type="submit" name="PreviousStudent" ';
-    $Str .= 'value="Previous Student" />'."\n";
-    $Str .= '&nbsp&nbsp&nbsp'."\n";
-    $Str .= &Apache::lonhtmlcommon::StudentOptions($cache, $students,
-                                                   $selectedName, 
-                                                   'StudentAssessment', 
-                                                   $formName);
-    $Str .= "\n".'&nbsp&nbsp&nbsp'."\n";
-    $Str .= '<input type="submit" name="NextStudent" ';
-    $Str .= 'value="Next Student" />'."\n";
-    $Str .= '</td></tr></table>'."\n";
-    $Str .= '<table cellspacing="5"><tr>'."\n";
-    $Str .= '<td align="center"><b>Select Sections</b>'."\n";
-    $Str .= '</td>'."\n";
-    $Str .= '<td align="center"><b>Select column to view:</b></td>'."\n";
-    $Str .= '<td></td></tr>'."\n";
-
+#    $Str .= &CreateLegend();
+    $Str .= '<table cellspacing="5">'."\n";
+    $Str .= '<tr>';
+    $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
+    $Str .= '<td align="center"><b>'.&mt('Student Data</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('Output Format').'</b>'.
+        &Apache::loncommon::help_open_topic("Chart_Output_Formats").
+        '</td>';
+    $Str .= '<td align="center"><b>'.&mt('Output Data').'</b>'.
+        &Apache::loncommon::help_open_topic("Chart_Output_Data").
+        '</td>';
+    $Str .= '</tr>'."\n";
+    #
     $Str .= '<tr><td align="center">'."\n";
-    my @sections = split(':',$cache->{'sectionList'});
-    my @selectedSections = split(':',$cache->{'sectionsSelected'});
-    $Str .= &Apache::lonhtmlcommon::MultipleSectionSelect(\@sections,
-                                                          \@selectedSections,
-                                                          'Statistics');
+    $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
     $Str .= '</td><td align="center">';
-    $Str .= &CreateColumnSelectionBox($doNotShow);
+    my $only_seq_with_assessments = sub { 
+        my $s=shift;
+        if ($s->{'num_assess'} < 1) { 
+            return 0;
+        } else { 
+            return 1;
+        }
+    };
+    $Str .= &Apache::lonstatistics::StudentDataSelect('StudentData','multiple',
+                                                      5,undef);
     $Str .= '</td><td>'."\n";
-    $Str .= '<input type="submit" name="DefaultColumns" ';
-    $Str .= 'value="Default Column Display" />'."\n";
+    $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
     $Str .= '</td><td>'."\n";
-    $Str .= '<input type="submit" name="displaymode" ';
-    if (! exists($ENV{'form.displaymode'}) ||
-        lc($ENV{'form.displaymode'}) eq 'display with links') {
-        $Str .= 'value="Display without links" />';
-        # Set the current value, in case it is undefined
-        $ENV{'form.displaymode'} = 'Display with links'; 
-    } else {
-        $Str .= 'value="Display with links" />';
-    }
-    $Str .= "\n";
-    $Str .= '</td></tr></table>'."\n";
-
+    $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
+                                              $only_seq_with_assessments);
+    $Str .= '</td><td>'."\n";
+    $Str .= &CreateAndParseOutputSelector();
+    $Str .= '</td><td>'."\n";
+    $Str .= &CreateAndParseOutputDataSelector();
+    $Str .= '</td></tr>'."\n";
+    $Str .= '</table>'."\n";
+    $Str .= '<input type="submit" name="Generate Chart" value="'.
+        &mt('Generate Chart').'" />';
+    $Str .= '&nbsp;'x5;
+    $Str .= '<input type="submit" name="selectstudent" value="'.
+        &mt('Select One Student').'" />';
+    $Str .= '&nbsp;'x5;
+    $Str .= '<input type="submit" name="ClearCache" value="'.
+        &mt('Clear Caches').'" />';
+    $Str .= '&nbsp;'x5;
+    $Str .= '<br />';
     return $Str;
 }
 
-sub CreateTableHeadings {
-    my($cache,$spacing,$infoKeys,$infoHeadings,$sequenceKeys,
-       $sequenceHeadings)=@_;
+#######################################################
+#######################################################
 
-    my $Str = '';
-    $Str .= '<table border="0" cellpadding="0" cellspacing="0">'."\n";
+=pod
 
-    $Str .= '<tr>'."\n";
-    $Str .= &CreateColumnSelectors($infoHeadings, $sequenceHeadings,
-                                   $sequenceKeys);
-    $Str .= '<td></td></tr>'."\n";
-
-    $Str .= '<tr>'."\n";
-    my $displayString = '<td align="left"><pre><a href="/adm/statistics?';
-    $displayString .= 'sort=LINKDATA">DISPLAYDATA</a>FORMATTING';
-    $displayString .= $spacing.'</pre></td>'."\n";
-    $Str .= &Apache::lonhtmlcommon::CreateHeadings($cache,
-                                                   $infoKeys,
-                                                   $infoHeadings,
-                                                   $displayString,
-                                                   'preformatted');
-
-    $displayString  = '<td align="left"><pre>DISPLAYDATAFORMATTING'.$spacing;
-    $displayString .= '</pre></td>'."\n";
-    $Str .= &Apache::lonhtmlcommon::CreateHeadings($cache,
-                                                   $sequenceKeys,
-                                                   $sequenceHeadings,
-                                                   $displayString,
-                                                   'preformatted');
+=item &CreateAndParseOutputSelector()
 
-    $Str .= '<td><pre>Total Solved/Total Problems</pre></td>';
-    $Str .= '</tr></table>'."\n";
+=cut
+
+#######################################################
+#######################################################
+my @OutputOptions = 
+    ({ name  => 'HTML, with links',
+       value => 'html, with links',
+       description => 'Output HTML with each symbol linked to the problem '.
+	   'which generated it.',
+       mode => 'html',
+       show_links => 'yes',
+       },
+     { name  => 'HTML, with all links',
+       value => 'html, with all links',
+       description => 'Output HTML with each symbol linked to the problem '.
+	   'which generated it.  '.
+           'This includes links for unattempted problems.',
+       mode => 'html',
+       show_links => 'all',
+       },
+     { name  => 'HTML, without links',
+       value => 'html, without links',
+       description => 'Output HTML.  By not including links, the size of the'.
+	   ' web page is greatly reduced.  If your browser crashes on the '.
+	   'full display, try this.',
+       mode => 'html',
+       show_links => 'no',
+           },
+     { name  => 'Excel',
+       value => 'excel',
+       description => 'Output an Excel file (compatable with Excel 95).',
+       mode => 'excel',
+       show_links => 'no',
+   },
+     { name  => 'CSV',
+       value => 'csv',
+       description => 'Output a comma seperated values file suitable for '.
+           'import into a spreadsheet program.  Using this method as opposed '.
+           'to Excel output allows you to organize your data before importing'.
+           ' it into a spreadsheet program.',
+       mode => 'csv',
+       show_links => 'no',
+           },
+     );
 
+sub OutputDescriptions {
+    my $Str = '';
+    $Str .= "<h2>Output Formats</h2>\n";
+    $Str .= "<dl>\n";
+    foreach my $outputmode (@OutputOptions) {
+	$Str .="    <dt>".$outputmode->{'name'}."</dt>\n";
+	$Str .="        <dd>".$outputmode->{'description'}."</dd>\n";
+    }
+    $Str .= "</dl>\n";
     return $Str;
 }
 
-=pod
+sub CreateAndParseOutputSelector {
+    my $Str = '';
+    my $elementname = 'chartoutputmode';
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+                                            [$elementname]);
+    #
+    # Format for output options is 'mode, restrictions';
+    my $selected = 'html, without links';
+    if (exists($ENV{'form.'.$elementname})) {
+        if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
+            $selected = $ENV{'form.'.$elementname}->[0];
+        } else {
+            $selected = $ENV{'form.'.$elementname};
+        }
+    }
+    #
+    # Set package variables describing output mode
+    $show_links  = 'no';
+    $output_mode = 'html';
+    foreach my $option (@OutputOptions) {
+        next if ($option->{'value'} ne $selected);
+        $output_mode = $option->{'mode'};
+        $show_links  = $option->{'show_links'};
+    }
+
+    #
+    # Build the form element
+    $Str = qq/<select size="5" name="$elementname">/;
+    foreach my $option (@OutputOptions) {
+        $Str .= "\n".'    <option value="'.$option->{'value'}.'"';
+        $Str .= " selected " if ($option->{'value'} eq $selected);
+        $Str .= ">".&mt($option->{'name'})."<\/option>";
+    }
+    $Str .= "\n</select>";
+    return $Str;
+}
 
-=item &FormatStudentData()
+##
+## Data selector stuff
+##
+my @OutputDataOptions =
+    (
+     { name  => 'Scores Summary',
+       base  => 'scores',
+       value => 'sum and total',
+       shortdesc => 'Total Score and Maximum Possible for each '.
+           'Sequence or Folder',
+       longdesc => 'The score of each student as well as the '.
+           ' maximum possible on each Sequence or Folder.',
+       },
+     { name  => 'Scores Per Problem',
+       base  => 'scores',
+       value => 'scores',
+       shortdesc => 'Score on each Problem Part',
+       longdesc =>'The students score on each problem part, computed as'.
+           'the part weight * part awarded',
+       },
+#     { name  => 'Scores Sum',
+#       base  => 'scores',
+#       value => 'sum only',
+#       shortdesc => 'Sum of Scores on each Problem Part',
+#       longdesc =>'The total of the scores of the student on each problem'.
+#           ' part in the sequences or folders selected.',
+#       },
+#     { name  => 'Scores Summary Table Only',
+#       base  => 'scores',
+#       value => 'final table scores',
+#       shortdesc => 'Summary of Scores',
+#       longdesc  => 'The average score on each sequence or folder for the '.
+#           'selected students.',
+#       },
+     { name  =>'Tries',
+       base  =>'tries',
+       value => 'tries',
+       shortdesc => 'Number of Tries before success on each Problem Part',
+       longdesc =>'The number of tries before success on each problem part.',
+       },
+     { name  =>'Parts Correct',
+       base  =>'tries',
+       value => 'parts correct total',
+       shortdesc => 'Number of Problem Parts completed successfully.',
+       longdesc => 'The Number of Problem Parts completed successfully and '.
+           'the maximum possible for each student',
+       },
+#     { name  =>'Parts Correct',
+#       base  =>'tries',
+#       value => 'parts correct',
+#       shortdesc => 'Number of Problem Parts completed successfully.',
+#       longdesc => 'The Number of Problem Parts completed successfully'.
+#           ' on each sequence or folder.',
+#       },
+#     { name  => 'Parts Summary Table Only',
+#       base  => 'tries',
+#       value => 'final table parts',
+#       shortdesc => 'Summary of Parts Correct',
+#       longdesc  => 'A summary table of the average number of problem parts '.
+#           'students were able to get correct on each sequence.',
+#       },
+     );
 
-First, FormatStudentInformation is called and prefixes the course information.
-This function produces a formatted string of the student\'s course information.
-Each column of data represents all the problems for a given sequence.  For
-valid grade data, a link is created for that problem to a submission record
-for that problem.
+sub HTMLifyOutputDataDescriptions {
+    my $Str = '';
+    $Str .= "<h2>Output Data</h2>\n";
+    $Str .= "<dl>\n";
+    foreach my $option (@OutputDataOptions) {
+        $Str .= '    <dt>'.$option->{'name'}.'</dt>';
+        $Str .= '<dd>'.$option->{'longdesc'}.'</dd>'."\n";
+    }
+    $Str .= "</dl>\n";
+    return $Str;
+}
 
-=over 4
+sub CreateAndParseOutputDataSelector {
+    my $Str = '';
+    my $elementname = 'chartoutputdata';
+    #
+    my $selected = 'scores';
+    if (exists($ENV{'form.'.$elementname})) {
+        if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
+            $selected = $ENV{'form.'.$elementname}->[0];
+        } else {
+            $selected = $ENV{'form.'.$elementname};
+        }
+    }
+    #
+    $data = 'scores';
+    foreach my $option (@OutputDataOptions) {
+        if ($option->{'value'} eq $selected) {
+            $data = $option->{'value'};
+            $base = $option->{'base'};
+            $datadescription = $option->{'shortdesc'};
+        }
+    }
+    #
+    # Build the form element
+    $Str = qq/<select size="5" name="$elementname">/;
+    foreach my $option (@OutputDataOptions) {
+        $Str .= "\n".'    <option value="'.$option->{'value'}.'"';
+        $Str .= " selected " if ($option->{'value'} eq $data);
+        $Str .= ">".&mt($option->{'name'})."<\/option>";
+    }
+    $Str .= "\n</select>";
+    return $Str;
 
-Input: $name, $studentInformation, $ChartDB
+}
 
-$name: The name and domain of the current student in name:domain format
+#######################################################
+#######################################################
 
-$studentInformation: A pointer to an array holding the names used to 
-remove data from the hash.  They represent 
-the name of the data to be removed.
+=pod
 
-$ChartDB: The name of the cached data database which will be tied to that 
-database.
+=head2 HTML output routines
 
-Output: $Str
+=item &html_initialize($r)
 
-$Str: Formatted string that is an entire row of the chart.  It is a 
-concatenation of student information and student course information.
+Create labels for the columns of student data to show.
 
-=back
+=item &html_outputstudent($r,$student)
+
+Return a line of the chart for a student.
+
+=item &html_finish($r)
 
 =cut
 
-sub StudentReport {
-    my ($cache,$name,$spacing,$showSequences)=@_;
-    my ($username,$domain)=split(':',$name);
+#######################################################
+#######################################################
+{
+    my $padding;
+    my $count;
+
+    my $nodata_count; # The number of students for which there is no data
+    my %prog_state;   # progress state used by loncommon PrgWin routines
+
+sub html_initialize {
+    my ($r) = @_;
+    #
+    $padding = ' 'x3;
+    $count = 0;
+    $nodata_count = 0;
+    undef(%prog_state);
+    #
+    $r->print("<h3>".$ENV{'course.'.$ENV{'request.course.id'}.'.description'}.
+              "&nbsp;&nbsp;".localtime(time)."</h3>");
+
+    if ($data !~ /^final table/) {
+        $r->print("<h3>".$datadescription."</h3>");        
+    }
+    #
+    # Set up progress window for 'final table' display only
+    if ($data =~ /^final table/) {
+        my $studentcount = scalar(@Apache::lonstatistics::Students); 
+        %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+            ($r,'Summary Table Status',
+             'Summary Table Compilation Progress', $studentcount);
+    }
+    my $Str = "<pre>\n";
+    # First, the @StudentData fields need to be listed
+    my @to_show = &get_student_fields_to_show();
+    foreach my $field (@to_show) {
+        my $title=$Apache::lonstatistics::StudentData{$field}->{'title'};
+        my $base =$Apache::lonstatistics::StudentData{$field}->{'base_width'};
+        my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
+        $Str .= $title.' 'x($width-$base).$padding;
+    }
+    # Now the selected sequences need to be listed
+    foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()){
+        my $title = $sequence->{'title'};
+        my $base  = $sequence->{'base_width'};
+        my $width = $sequence->{'width'};
+        $Str .= $title.' 'x($width-$base).$padding;
+    }
+    $Str .= "total</pre>\n";
+    $Str .= "<pre>";
+    #
+    # Check for suppression of output
+    if ($data =~ /^final table/) {
+        $Str = '';
+    }
+    $r->print($Str);
+    $r->rflush();
+    return;
+}
 
+sub html_outputstudent {
+    my ($r,$student) = @_;
     my $Str = '';
-    if(defined($cache->{$name.':error'})) {
-        return $Str;
+    #
+    if($count++ % 5 == 0 && $count > 0 && $data !~ /^final table/) {
+        $r->print("</pre><pre>");
+    }
+    # First, the @StudentData fields need to be listed
+    my @to_show = &get_student_fields_to_show();
+    foreach my $field (@to_show) {
+        my $title=$student->{$field};
+        my $base = length($title);
+        my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
+        $Str .= $title.' 'x($width-$base).$padding;
+    }
+    # Get ALL the students data
+    my %StudentsData;
+    my @tmp = &Apache::loncoursedata::get_current_state
+        ($student->{'username'},$student->{'domain'},undef,
+         $ENV{'request.course.id'});
+    if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
+        %StudentsData = @tmp;
+    }
+    if (scalar(@tmp) < 1) {
+        $nodata_count++;
+        return if ($data =~ /^final table/);
+        $Str .= '<font color="blue">No Course Data</font>'."\n";
+        $r->print($Str);
+        $r->rflush();
+        return;
     }
-    if($cache->{$name.':error'} =~ /course/) {
-        $Str .= '<b><font color="blue">No course data for student </font>';
-        $Str .= '<font color="red">'.$username.'.</font></b><br>';
-        return $Str;
-    }
-
-    my $hasVersion = 'false';
-    my $hasFinalData = 'false';
-    foreach my $sequence (@$showSequences) {
-        my $hasData = 'false';
-        my $characterCount=0;
-        foreach my $problemID (split(':', $cache->{$sequence.':problems'})) {
-            my $problem = $cache->{$problemID.':problem'};
-            # All grades (except for versionless parts) are displayed as links
-            # to their submission record.  Loop through all the parts for the
-            # current problem in the correct order and prepare the output links
-            foreach(split(/\:/,$cache->{$sequence.':'.$problemID.
-                                        ':parts'})) {
-                if($cache->{$name.':'.$problemID.':NoVersion'} eq 'true' ||
-                   $cache->{$name.':'.$problemID.':'.$_.':code'} eq ' ' ||
-                   $cache->{$name.':'.$problemID.':'.$_.':code'} eq '') {
-                    $Str .= ' ';
-                    $characterCount++;
-                    next;
-                }
-                $hasVersion = 'true';
-                $hasData = 'true';
-                if (lc($ENV{'form.displaymode'}) ne 'display without links') {
-                    $Str .= '<a href="/adm/grades?symb=';
-                    $Str .= &Apache::lonnet::escape($problem);
-                    $Str .= '&student='.$username.'&domain='.$domain;
-                    $Str .= '&command=submission">'; 
-                }
-                my $code = $cache->{$name.':'.$problemID.':'.$_.':code'};
-                my $tries = $cache->{$name.':'.$problemID.':'.$_.':tries'};
-                if($code eq '*' && $tries < 10 && $tries ne '') {
-                    $code = $tries;
-                }
-                $Str .= $code;
-                if (lc($ENV{'form.displaymode'}) ne 'display without links') {
-                    $Str .= '</a>';
-                }
-                $characterCount++;
-            }
+    #
+    # By sequence build up the data
+    my $studentstats;
+    my $PerformanceStr = '';
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        my ($performance,$performance_length,$score,$seq_max,$rawdata);
+        if ($base eq 'tries') {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentTriesOnSequence($student,\%StudentsData,
+                                        $seq,$show_links);
+        } else {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentPerformanceOnSequence($student,\%StudentsData,
+                                              $seq,$show_links);
         }
-
-        # Output the number of correct answers for the current sequence.
-        # This part takes up 6 character slots, but is formated right
-        # justified.
-        my $spacesNeeded=$cache->{$sequence.':columnWidth'}-$characterCount;
-        $spacesNeeded -= 3;
-        $Str .= (' 'x$spacesNeeded);
-
-#        my $outputProblemsCorrect = sprintf("%3d", $cache->{$name.':'.$sequence.
-#							    ':problemsCorrect'});
-
-	my $outputProblemsCorrect = sprintf("%2d/%2d", $cache->{$name.':'.$sequence.
-                                            ':problemsCorrect'},
-                                            $characterCount);
-        if($hasData eq 'true') {
-            $Str .= '<font color="#007700">'.$outputProblemsCorrect.'</font>';
-            $hasFinalData = 'true';
+        my $ratio = sprintf("%3d",$score).'/'.sprintf("%3d",$seq_max);
+        #
+        if ($data eq 'sum and total' || $data eq 'parts correct total') {
+            $performance  = $ratio;
+            $performance .= ' 'x($seq->{'width'}-length($ratio));
+        } elsif ($data eq 'sum only' || $data eq 'parts correct') {
+            $performance  = $score;
+            $performance .= ' 'x($seq->{'width'}-length($score));
         } else {
-            $Str .= '<font color="#007700">     </font>';
+            # Pad with extra spaces
+            $performance .= ' 'x($seq->{'width'}-$performance_length-
+                                 length($ratio)
+                                 ).$ratio;
         }
-        $Str .= $spacing;
+        #
+        $Str .= $performance.$padding;
+        #
+        $studentstats->{$seq->{'symb'}}->{'score'}= $score;
+        $studentstats->{$seq->{'symb'}}->{'max'}  = $seq_max;
+    }
+    #
+    # Total it up and store the statistics info.
+    my ($score,$max) = (0,0);
+    while (my ($symb,$seq_stats) = each (%{$studentstats})) {
+        $Statistics->{$symb}->{'score'} += $seq_stats->{'score'};
+        if ($Statistics->{$symb}->{'max'} < $seq_stats->{'max'}) {
+            $Statistics->{$symb}->{'max'} = $seq_stats->{'max'};
+        }
+        $score += $seq_stats->{'score'};
+        $max   += $seq_stats->{'max'};
     }
+    $Str .= ' '.' 'x(length($max)-length($score)).$score.'/'.$max;
+    $Str .= " \n";
+    #
+    # Check for suppressed output and update the progress window if so...
+    if ($data =~ /^final table/) {
+        $Str = '';
+        &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
+                                                 'last student');
+    }
+    #
+    $r->print($Str);
+    #
+    $r->rflush();
+    return;
+}    
 
-    # Output the total correct problems over the total number of problems.
-    # I don't like this type of formatting, but it is a solution.  Need
-    # a way to dynamically determine the space requirements.
-    my $outputProblemsSolved = sprintf("%4d", $cache->{$name.':problemsSolved'});
-    my $outputTotalProblems  = sprintf("%4d", $cache->{$name.':totalProblems'});
-    if($hasFinalData eq 'true') {
-        $Str .= '<font color="#000088">'.$outputProblemsSolved.
-	    ' / '.$outputTotalProblems.'</font>';
+sub html_finish {
+    my ($r) = @_;
+    #
+    # Check for suppressed output and close the progress window if so
+    if ($data =~ /^final table/) {
+        &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
     } else {
-        $Str .= '<font color="#000088">           </font>';
+        $r->print("</pre>\n"); 
     }
-
-    if($hasVersion eq 'false') {
-        $Str = '<b><font color="blue">No course data.</font></b>';
+    if ($single_student_mode) {
+        $r->print(&SingleStudentTotal());
+    } else {
+        $r->print(&StudentAverageTotal());
     }
-
-    return $Str;
+    $r->rflush();
+    return;
 }
 
-
 sub StudentAverageTotal {
-    
-    return "";
-
-    my ($cache,$name,$spacing,$showSequences)=@_;
-    my $username = $name;
-    my $Str = '';
-    my $hasVersion = 'false';
-    my $hasFinalData = 'false';
-    foreach my $sequence (@$showSequences) {
-        my $hasData = 'false';
-        my $characterCount=0;
-        foreach my $problemID (split(':', $cache->{$sequence.':problems'})) {
-            my $problem = $cache->{$problemID.':problem'};
-            # All grades (except for versionless parts) are displayed as links
-            # to their submission record.  Loop through all the parts for the
-            # current problem in the correct order and prepare the output links
-            foreach(split(/\:/,$cache->{$sequence.':'.$problemID.
-                                        ':parts'})) {
-                if($cache->{$name.':'.$problemID.':NoVersion'} eq 'true' ||
-                   $cache->{$name.':'.$problemID.':'.$_.':code'} eq ' ' ||
-                   $cache->{$name.':'.$problemID.':'.$_.':code'} eq '') {
-                    $Str .= ' ';
-                    $characterCount++;
-                    next;
-                }
-                $hasVersion = 'true';
-                $hasData = 'true';
-                $Str .= '<a href="/adm/grades?symb=';
-                $Str .= &Apache::lonnet::escape($problem);
-                $Str .= '&student= Average &domain= Total';
-                $Str .= '&command=submission">';
-                my $code = $cache->{$name.':'.$problemID.':'.$_.':code'};
-                my $tries = $cache->{$name.':'.$problemID.':'.$_.':tries'};
-                if($code eq '*' && $tries < 10 && $tries ne '') {
-                    $code = $tries;
-                }
-                $Str .= $code;
-                $Str .= '</a>';
-                $characterCount++;
-            }
+    my $Str = "<h3>Summary Tables</h3>\n";
+    my $num_students = scalar(@Apache::lonstatistics::Students);
+    my $total_ave = 0;
+    my $total_max = 0;
+    $Str .= '<table border=2 cellspacing="1">'."\n";
+    $Str .= "<tr><th>Title</th><th>Average</th><th>Maximum</th></tr>\n";
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        my $ave;
+        if ($num_students > $nodata_count) {
+            $ave = int(100*($Statistics->{$seq->{'symb'}}->{'score'}/
+                            ($num_students-$nodata_count)))/100;
+        } else {
+            $ave = 0;
         }
+        $total_ave += $ave;
+        my $max = $Statistics->{$seq->{'symb'}}->{'max'};
+        $total_max += $max;
+        if ($ave == 0) {
+            $ave = "0.00";
+        }
+        $ave .= '&nbsp;';
+        $max .= '&nbsp;&nbsp;&nbsp;';
+        $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
+            '<td align="right">'.$ave.'</td>'.
+                '<td align="right">'.$max.'</td></tr>'."\n";
+    }
+    $total_ave = int(100*$total_ave)/100; # only two digit
+    $Str .= "</table>\n";
+    $Str .= '<table border=2 cellspacing="1">'."\n";
+    $Str .= '<tr><th>Number of Students</th><th>Average</th>'.
+        "<th>Maximum</th></tr>\n";
+    $Str .= '<tr><td>'.($num_students-$nodata_count).'</td>'.
+        '<td>'.$total_ave.'</td><td>'.$total_max.'</td>';
+    $Str .= "</table>\n";
+    return $Str;
+}
 
-        # Output the number of correct answers for the current sequence.
-        # This part takes up 6 character slots, but is formated right
-        # justified.
-        my $spacesNeeded=$cache->{$sequence.':columnWidth'}-$characterCount;
-        $spacesNeeded -= 3;
-        $Str .= (' 'x$spacesNeeded);
-
-#        my $outputProblemsCorrect = sprintf("%3d", $cache->{$name.':'.$sequence.
-#							    ':problemsCorrect'});
-
-	my $outputProblemsCorrect = sprintf("%2d/%2d", $cache->{$name.':'.$sequence.
-                                            ':problemsCorrect'},
-                                            $characterCount);
-        if($hasData eq 'true') {
-            $Str .= '<font color="#007700">'.$outputProblemsCorrect.'</font>';
-            $hasFinalData = 'true';
-        } else {
-            $Str .= '<font color="#007700">     </font>';
-        }
-        $Str .= $spacing;
-    }
-
-    # Output the total correct problems over the total number of problems.
-    # I don't like this type of formatting, but it is a solution.  Need
-    # a way to dynamically determine the space requirements.
-    my $outputProblemsSolved = sprintf("%4d", $cache->{$name.':problemsSolved'});
-    my $outputTotalProblems  = sprintf("%4d", $cache->{$name.':totalProblems'});
-    if($hasFinalData eq 'true') {
-        $Str .= '<font color="#000088">'.$outputProblemsSolved.
-	    ' / '.$outputTotalProblems.'</font>';
-    } else {
-        $Str .= '<font color="#000088">           </font>';
-    }
-
-    if($hasVersion eq 'false') {
-        $Str = '<b><font color="blue">No course data.</font></b>';
-    }
-
+sub SingleStudentTotal {
+    my $student = &Apache::lonstatistics::current_student();
+    my $Str = "<h3>Summary table for ".$student->{'fullname'}." ".
+        $student->{'username'}.'@'.$student->{'domain'}."</h3>\n";
+    $Str .= '<table border=2 cellspacing="1">'."\n";
+    $Str .= 
+        "<tr><th>Sequence or Folder</th><th>Score</th><th>Maximum</th></tr>\n";
+    my $total = 0;
+    my $total_max = 0;
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        my $value = $Statistics->{$seq->{'symb'}}->{'score'};
+        my $max = $Statistics->{$seq->{'symb'}}->{'max'};
+        $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
+            '<td align="right">'.$value.'</td>'.
+                '<td align="right">'.$max.'</td></tr>'."\n";
+        $total += $value;
+        $total_max +=$max;
+    }
+    $Str .= '<tr><td><b>Total</b></td>'.
+        '<td align="right">'.$total.'</td>'.
+        '<td align="right">'.$total_max."</td></tr>\n";
+    $Str .= "</table>\n";
     return $Str;
 }
 
+}
 
+#######################################################
+#######################################################
 
 =pod
 
-=item &CreateLegend()
+=head2 EXCEL subroutines
 
-This function returns a formatted string containing the legend for the
-chart.  The legend describes the symbols used to represent grades for
-problems.
+=item &excel_initialize($r)
 
-=cut
+=item &excel_outputstudent($r,$student)
 
-sub CreateLegend {
-    my $Str = "<p><pre>".
-              "   1  correct by student in 1 try\n".
-              "   7  correct by student in 7 tries\n".
-              "   *  correct by student in more than 9 tries\n".
-	      "   +  correct by override\n".
-              "   -  incorrect by override\n".
-	      "   .  incorrect attempted\n".
-	      "   #  ungraded attempted\n".
-              "      not attempted (blank field)\n".
-	      "   x  excused".
-              "</pre><p>";
-    return $Str;
-}
+=item &excel_finish($r)
 
-=pod
+=cut
 
-=item &CreateColumnSelectionBox()
+#######################################################
+#######################################################
+{
+
+my $excel_sheet;
+my $excel_workbook;
+
+my $filename;
+my $rows_output;
+my $cols_output;
+
+my %prog_state; # progress window state
+my $request_aborted;
+
+my $total_formula;
+
+sub excel_initialize {
+    my ($r) = @_;
+    #
+    undef ($excel_sheet);
+    undef ($excel_workbook);
+    undef ($filename);
+    undef ($rows_output);
+    undef ($cols_output);
+    undef (%prog_state);
+    undef ($request_aborted);
+    undef ($total_formula);
+    #
+    my $total_columns = scalar(&get_student_fields_to_show());
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        # Add 2 because we need a 'sum' and 'total' column for each
+        $total_columns += $seq->{'num_assess_parts'}+2;
+    }
+    if ($data eq 'tries' && $total_columns > 255) {
+        $r->print(<<END);
+<h2>Unable to Complete Request</h2>
+<p>
+LON-CAPA is unable to produce your Excel spreadsheet because your selections
+will result in more than 255 columns.  Excel allows only 255 columns in a
+spreadsheet.
+</p><p>
+You may consider reducing the number of <b>Sequences or Folders</b> you
+have selected.  
+</p><p>
+LON-CAPA can produce <b>CSV</b> files of this data or Excel files of the
+summary data (<b>Parts Correct</b> or <b>Parts Correct & Totals</b>).
+</p>
+END
+       $request_aborted = 1;
+    }
+    if ($data eq 'scores' && $total_columns > 255) {
+        $r->print(<<END);
+<h2>Unable to Complete Request</h2>
+<p>
+LON-CAPA is unable to produce your Excel spreadsheet because your selections
+will result in more than 255 columns.  Excel allows only 255 columns in a
+spreadsheet.
+</p><p>
+You may consider reducing the number of <b>Sequences or Folders</b> you
+have selected.  
+</p><p>
+LON-CAPA can produce <b>CSV</b> files of this data or Excel files of the
+<b>Scores Summary</b> data.
+</p>
+END
+       $request_aborted = 1;
+    }
+    if ($data =~ /^final table/) {
+        $r->print(<<END);
+<h2>Unable to Complete Request</h2>
+<p>
+The <b>Summary Table (Scores)</b> option is not available for non-HTML output.
+</p>
+END
+       $request_aborted = 1;
+    }
+    return if ($request_aborted);
+    #
+    $filename = '/prtspool/'.
+        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
+            time.'_'.rand(1000000000).'.xls';
+    #
+    $excel_workbook = undef;
+    $excel_sheet = undef;
+    #
+    $rows_output = 0;
+    $cols_output = 0;
+    #
+    # Create sheet
+    $excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
+    #
+    # Check for errors
+    if (! defined($excel_workbook)) {
+        $r->log_error("Error creating excel spreadsheet $filename: $!");
+        $r->print("Problems creating new Excel file.  ".
+                  "This error has been logged.  ".
+                  "Please alert your LON-CAPA administrator");
+        return ;
+    }
+    #
+    # The excel spreadsheet stores temporary data in files, then put them
+    # together.  If needed we should be able to disable this (memory only).
+    # The temporary directory must be specified before calling 'addworksheet'.
+    # File::Temp is used to determine the temporary directory.
+    $excel_workbook->set_tempdir($Apache::lonnet::tmpdir);
+    #
+    # Add a worksheet
+    my $sheetname = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
+    $sheetname = &Apache::loncommon::clean_excel_name($sheetname);
+    $excel_sheet = $excel_workbook->addworksheet($sheetname);
+    #
+    # Put the course description in the header
+    $excel_sheet->write($rows_output,$cols_output++,
+                   $ENV{'course.'.$ENV{'request.course.id'}.'.description'});
+    $cols_output += 3;
+    #
+    # Put a description of the sections listed
+    my $sectionstring = '';
+    my @Sections = @Apache::lonstatistics::SelectedSections;
+    if (scalar(@Sections) > 1) {
+        if (scalar(@Sections) > 2) {
+            my $last = pop(@Sections);
+            $sectionstring = "Sections ".join(', ',@Sections).', and '.$last;
+        } else {
+            $sectionstring = "Sections ".join(' and ',@Sections);
+        }
+    } else {
+        if ($Sections[0] eq 'all') {
+            $sectionstring = "All sections";
+        } else {
+            $sectionstring = "Section ".$Sections[0];
+        }
+    }
+    $excel_sheet->write($rows_output,$cols_output++,$sectionstring);
+    $cols_output += scalar(@Sections);
+    #
+    # Put the date in there too
+    $excel_sheet->write($rows_output++,$cols_output++,
+                        'Compiled on '.localtime(time));
+    #
+    $cols_output = 0;
+    $excel_sheet->write($rows_output++,$cols_output++,$datadescription);
+    #
+    if ($data eq 'tries' || $data eq 'scores') {
+        $rows_output++;
+    }
+    #
+    # Add the student headers
+    $cols_output = 0;
+    foreach my $field (&get_student_fields_to_show()) {
+        $excel_sheet->write($rows_output,$cols_output++,$field);
+    }
+    my $row_offset = 0;
+    if ($data eq 'tries' || $data eq 'scores') {
+        $row_offset = -1;
+    }
+    #
+    # Add the remaining column headers
+    my $total_formula_string = '=0';
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        $excel_sheet->write($rows_output+$row_offset,
+                            $cols_output,$seq->{'title'});
+        if ($data eq 'tries' || $data eq 'scores') {
+            # Determine starting cell
+            $seq->{'Excel:startcell'}=
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                ($rows_output,$cols_output);
+            $seq->{'Excel:startcol'}=$cols_output;
+            # Put the names of the problems and parts into the sheet
+            foreach my $res (@{$seq->{'contents'}}) {
+                next if ($res->{'type'} ne 'assessment');
+                if (scalar(@{$res->{'parts'}}) > 1) {
+                    foreach my $part (@{$res->{'parts'}}) {
+                        $excel_sheet->write($rows_output,
+                                            $cols_output++,
+                                            $res->{'title'}.' part '.$part);
+                    }
+                } else {
+                    $excel_sheet->write($rows_output,
+                                        $cols_output++,
+                                        $res->{'title'});
+                }
+            }
+            # Determine ending cell
+            $seq->{'Excel:endcell'} = 
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                                             ($rows_output,$cols_output-1);
+            $seq->{'Excel:endcol'}=$cols_output-1;
+            # Create the formula for summing up this sequence
+            $seq->{'Excel:sum'}= $excel_sheet->store_formula
+                                        ('=SUM('.$seq->{'Excel:startcell'}.
+                                             ':'.$seq->{'Excel:endcell'}.')');
+        }
+        # Determine cell the score is held in
+        $seq->{'Excel:scorecell'} = 
+            &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+            ($rows_output,$cols_output);
+        $seq->{'Excel:scorecol'}=$cols_output;
+        if ($data eq 'parts correct total') {
+            $excel_sheet->write($rows_output,$cols_output++,'parts correct');
+        } else {
+            $excel_sheet->write($rows_output,$cols_output++,'score');
+        }
+        #
+        $total_formula_string.='+'.
+            &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+            ($rows_output,$cols_output-1);
+        $excel_sheet->write($rows_output,$cols_output++,'maximum');
+    }
+    $excel_sheet->write($rows_output,$cols_output++,'Grand Total');
+    $total_formula = $excel_sheet->store_formula($total_formula_string);
+    #
+    # Bookkeeping
+    if ($data eq 'sum and total' || $data eq 'parts correct total') {
+        $rows_output += 2;
+    } else {
+        $rows_output += 1;
+    }
+    #
+    # Output a row for MAX
+    $cols_output = 0;
+    foreach my $field (&get_student_fields_to_show()) {
+        if ($field eq 'username' || $field eq 'fullname' || 
+            $field eq 'id') {
+            $excel_sheet->write($rows_output,$cols_output++,'Maximum');
+        } else {
+            $excel_sheet->write($rows_output,$cols_output++,'');
+        }
+    }
+    #
+    # Add the maximums for each sequence or assessment
+    my %total_cell_translation;
+    my $grand_total = 0;
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        $total_cell_translation{$seq->{'Excel:scorecell'}} = 
+            &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                        ($rows_output,$seq->{'Excel:scorecol'});
+        my $weight;
+        my $max = 0;
+        foreach my $resource (@{$seq->{'contents'}}) {
+            next if ($resource->{'type'} ne 'assessment');
+            foreach my $part (@{$resource->{'parts'}}) {
+                $weight = 1;
+                if ($base eq 'scores') {
+                    $weight = &Apache::lonnet::EXT
+                        ('resource.'.$part.'.weight',$resource->{'symb'},
+                         undef,undef,undef);
+                    if (!defined($weight) || ($weight eq '')) { 
+                        $weight=1;
+                    }
+                }
+                if ($data eq 'scores') {
+                    $excel_sheet->write($rows_output,$cols_output++,$weight);
+                } elsif ($data eq 'tries') {
+                    $excel_sheet->write($rows_output,$cols_output++,'');
+                }
+                $max += $weight;
+            }
+        } 
+        if (! ($data eq 'sum only' || $data eq 'parts correct')) {
+            $excel_sheet->write($rows_output,$cols_output++,'');
+        }
+        #
+        if ($data eq 'tries' || $data eq 'scores') {
+            my %replaceCells;
+            $replaceCells{$seq->{'Excel:startcell'}} = 
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                ($rows_output,$seq->{'Excel:startcol'});
+            $replaceCells{$seq->{'Excel:endcell'}} = 
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                ($rows_output,$seq->{'Excel:endcol'});
+            $excel_sheet->repeat_formula($rows_output,$cols_output++,
+                                         $seq->{'Excel:sum'},undef,
+                                         %replaceCells);
+        } else {
+            $excel_sheet->write($rows_output,$cols_output++,
+                                $max);
+        }
+        $grand_total+=$max;
+    }
+    if ($data eq 'tries' || $data eq 'scores') {
+        $excel_sheet->repeat_formula($rows_output,$cols_output++,
+                                     $total_formula,undef,
+                                     %total_cell_translation);
+    } else {
+        $excel_sheet->write($rows_output,$cols_output++,$grand_total);
+    }
+    $rows_output++;
+    #
+    # Let the user know what we are doing
+    my $studentcount = scalar(@Apache::lonstatistics::Students); 
+    $r->print("<h1>Compiling Excel spreadsheet for ".
+              $studentcount.' student');
+    $r->print('s') if ($studentcount > 1);
+    $r->print("</h1>\n");
+    $r->rflush();
+    #
+    # Initialize progress window
+    %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,'Excel File Compilation Status',
+         'Excel File Compilation Progress', $studentcount);
+    #
+    &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,
+                                          'Processing first student');
+    return;
+}
 
-If there are columns not being displayed then this selection box is created
-with a list of those columns.  When selections are made and the page
-refreshed, the columns will be removed from this box and the column is
-put back in the chart.  If there is no columns to select, no row is added
-to the interface table.
+sub excel_outputstudent {
+    my ($r,$student) = @_;
+    return if ($request_aborted);
+    return if (! defined($excel_sheet));
+    $cols_output=0;
+    #
+    # Write out student data
+    my @to_show = &get_student_fields_to_show();
+    foreach my $field (@to_show) {
+        $excel_sheet->write($rows_output,$cols_output++,$student->{$field});
+    }
+    #
+    # Get student assessment data
+    my %StudentsData;
+    my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
+                                                        $student->{'domain'},
+                                                        undef,
+                                                   $ENV{'request.course.id'});
+    if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
+        %StudentsData = @tmp;
+    }
+    #
+    # Write out sequence scores and totals data
+    my %total_cell_translation;
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        # Keep track of cells to translate in total cell
+        $total_cell_translation{$seq->{'Excel:scorecell'}} = 
+            &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                        ($rows_output,$seq->{'Excel:scorecol'});
+        #
+        my ($performance,$performance_length,$score,$seq_max,$rawdata);
+        if ($base eq 'tries') {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentTriesOnSequence($student,\%StudentsData,
+                                        $seq,'no');
+        } else {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentPerformanceOnSequence($student,\%StudentsData,
+                                              $seq,'no');
+        }
+        if ($data eq 'tries' || $data eq 'scores') {
+            foreach my $value (@$rawdata) {
+                $excel_sheet->write($rows_output,$cols_output++,$value);
+            }
+            # Write a formula for the sum of this sequence
+            my %replaceCells;
+            $replaceCells{$seq->{'Excel:startcell'}} = 
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                            ($rows_output,$seq->{'Excel:startcol'});
+            $replaceCells{$seq->{'Excel:endcell'}} = 
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                            ($rows_output,$seq->{'Excel:endcol'});
+            # The undef is for the format
+            if (scalar(keys(%replaceCells)) == 1) {
+                $excel_sheet->repeat_formula($rows_output,$cols_output++,
+                                             $seq->{'Excel:sum'},undef,
+                                             %replaceCells,%replaceCells);
+            } else {
+                $excel_sheet->repeat_formula($rows_output,$cols_output++,
+                                             $seq->{'Excel:sum'},undef,
+                                             %replaceCells);
+            }
+            #
+            $excel_sheet->write($rows_output,$cols_output++,$seq_max);
+        } elsif ($data eq 'sum and total' || $data eq 'sum only' || 
+            $data eq 'parts correct' || $data eq 'parts correct total') {
+            $excel_sheet->write($rows_output,$cols_output++,$score);
+        }
+        if ($data eq 'sum and total' || $data eq 'parts correct total') {
+            $excel_sheet->write($rows_output,$cols_output++,$seq_max);
+        }
+    }
+    #
+    $excel_sheet->repeat_formula($rows_output,$cols_output++,
+                                 $total_formula,undef,
+                                 %total_cell_translation);
+
+    #
+    # Bookkeeping
+    $rows_output++; 
+    $cols_output=0;
+    #
+    # Update the progress window
+    &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
+    return;
+}
 
-=over 4
-Input: $CacheData, $headings
+sub excel_finish {
+    my ($r) = @_;
+    return if ($request_aborted);
+    return if (! defined($excel_sheet));
+    #
+    # Write the excel file
+    $excel_workbook->close();
+    my $c = $r->connection();
+    #
+    return if($c->aborted());
+    #
+    # Close the progress window
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+    #
+    # Tell the user where to get their excel file
+    $r->print('<br />'.
+              '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
+    $r->rflush();
+    return;
+}
 
+}
+#######################################################
+#######################################################
 
-$CacheData: A pointer to a hash tied to the cached data
+=pod
 
-$headings:  An array of the names of the columns for the student information.
-They are used for displaying which columns are missing.
+=head2 CSV output routines
 
-Output: $notThere
+=item &csv_initialize($r)
 
-$notThere: The string contains one row of a table.  The first column has the
-name of the selection box.  The second contains the selection box
-which has a size of four.
+=item &csv_outputstudent($r,$student)
 
-=back
+=item &csv_finish($r)
 
 =cut
 
-sub CreateColumnSelectionBox {
-    my ($doNotShow)=@_;
-
-    my $notThere = '';
-    $notThere .= '<select name="ReselectColumns" size="4" ';
-    $notThere .= 'multiple="true">'."\n";
+#######################################################
+#######################################################
+{
+
+my $outputfile;
+my $filename;
+my $request_aborted;
+my %prog_state; # progress window state
+
+sub csv_initialize{
+    my ($r) = @_;
+    # 
+    # Clean up
+    undef($outputfile);
+    undef($filename);
+    undef($request_aborted);
+    undef(%prog_state);
+    #
+    # Deal with unimplemented requests
+    $request_aborted = undef;
+    if ($data =~ /final table/) {
+        $r->print(<<END);
+<h2>Unable to Complete Request</h2>
+<p>
+The <b>Summary Table (Scores)</b> option is not available for non-HTML output.
+</p>
+END
+       $request_aborted = 1;
+    }
+    return if ($request_aborted);
+
+    #
+    # Open a file
+    $filename = '/prtspool/'.
+        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
+            time.'_'.rand(1000000000).'.csv';
+    unless ($outputfile = Apache::File->new('>/home/httpd'.$filename)) {
+        $r->log_error("Couldn't open $filename for output $!");
+        $r->print("Problems occured in writing the csv file.  ".
+                  "This error has been logged.  ".
+                  "Please alert your LON-CAPA administrator.");
+        $outputfile = undef;
+    }
+    #
+    # Datestamp
+    my $description = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
+    print $outputfile '"'.&Apache::loncommon::csv_translate($description).'",'.
+        '"'.&Apache::loncommon::csv_translate(scalar(localtime(time))).'"'.
+            "\n";
+    #
+    # Print out the headings
+    my $Str = '';
+    my $Str2 = undef;
+    foreach my $field (&get_student_fields_to_show()) {
+        if ($data eq 'sum only') {
+            $Str .= '"'.&Apache::loncommon::csv_translate($field).'",';
+        } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
+            $Str .= '"",'; # first row empty on the student fields
+            $Str2 .= '"'.&Apache::loncommon::csv_translate($field).'",';
+        } elsif ($data eq 'scores' || $data eq 'tries' || 
+                 $data eq 'parts correct') {
+            $Str  .= '"",';
+            $Str2 .= '"'.&Apache::loncommon::csv_translate($field).'",';
+        }
+    }
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        if ($data eq 'sum only' || $data eq 'parts correct') {
+            $Str .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
+                '",';
+        } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
+            $Str  .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
+                '","",';
+            $Str2 .= '"score","total possible",';
+        } elsif ($data eq 'scores' || $data eq 'tries') {
+            $Str  .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
+                '",';
+            $Str .= '"",'x($seq->{'num_assess_parts'}-1+2);
+            foreach my $res (@{$seq->{'contents'}}) {
+                next if ($res->{'type'} ne 'assessment');
+                foreach my $part (@{$res->{'parts'}}) {
+                    $Str2 .= '"'.&Apache::loncommon::csv_translate($res->{'title'}.', Part '.$part).'",';
+                }
+            }
+            $Str2 .= '"score","total possible",';
+        }
+    }
+    chop($Str);
+    $Str .= "\n";
+    print $outputfile $Str;
+    if (defined($Str2)) {
+        chop($Str2);
+        $Str2 .= "\n";
+        print $outputfile $Str2;
+    }
+    #
+    # Initialize progress window
+    my $studentcount = scalar(@Apache::lonstatistics::Students);
+    %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,'CSV File Compilation Status',
+         'CSV File Compilation Progress', $studentcount);
+    return;
+}
 
-    for(my $index=0; $index<$doNotShow->{'count'}; $index++) {
-        my $name = $doNotShow->{$index.':name'};
-        $notThere .= '<option value="';
-        $notThere .= $doNotShow->{$index.':id'}.'">';
-        $notThere .= $name.'</option>'."\n";
+sub csv_outputstudent {
+    my ($r,$student) = @_;
+    return if ($request_aborted);
+    return if (! defined($outputfile));
+    my $Str = '';
+    #
+    # Output student fields
+    my @to_show = &get_student_fields_to_show();
+    foreach my $field (@to_show) {
+        $Str .= '"'.&Apache::loncommon::csv_translate($student->{$field}).'",';
+    }
+    #
+    # Get student assessment data
+    my %StudentsData;
+    my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
+                                                        $student->{'domain'},
+                                                        undef,
+                                                   $ENV{'request.course.id'});
+    if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
+        %StudentsData = @tmp;
+    }
+    #
+    # Output performance data
+    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+        my ($performance,$performance_length,$score,$seq_max,$rawdata);
+        if ($base eq 'tries') {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentTriesOnSequence($student,\%StudentsData,
+                                        $seq,'no');
+        } else {
+            ($performance,$performance_length,$score,$seq_max,$rawdata) =
+                &StudentPerformanceOnSequence($student,\%StudentsData,
+                                              $seq,'no');
+        }
+        if ($data eq 'sum only' || $data eq 'parts correct') {
+            $Str .= '"'.$score.'",';
+        } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
+            $Str  .= '"'.$score.'","'.$seq_max.'",';
+        } elsif ($data eq 'scores' || $data eq 'tries') {
+            $Str .= '"'.join('","',(@$rawdata,$score,$seq_max)).'",';
+        }
     }
+    chop($Str);
+    $Str .= "\n";
+    print $outputfile $Str;
+    #
+    # Update the progress window
+    &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
+    return;
+}
 
-    $notThere .= '</select>';
+sub csv_finish {
+    my ($r) = @_;
+    return if ($request_aborted);
+    return if (! defined($outputfile));
+    close($outputfile);
+    #
+    my $c = $r->connection();
+    return if ($c->aborted());
+    #
+    # Close the progress window
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+    #
+    # Tell the user where to get their csv file
+    $r->print('<br />'.
+              '<a href="'.$filename.'">Your csv file.</a>'."\n");
+    $r->rflush();
+    return;
+    
+}
 
-    return $notThere;
 }
 
+#######################################################
+#######################################################
+
 =pod
 
-=item &CreateColumnSelectors()
+=item &StudentTriesOnSequence()
 
-This function generates the checkboxes above the column headings.  The
-column will be removed if the checkbox is unchecked.
+Inputs:
 
 =over 4
 
-Input: $CacheData, $headings
-
-$CacheData: A pointer to a hash tied to the cached data
+=item $student
 
-$headings:  An array of the names of the columns for the student 
-information.  They are used to know what are the student information columns
+=item $studentdata Hash ref to all student data
 
-Output: $present
+=item $seq Hash ref, the sequence we are working on
 
-$present: The string contains the first row of a table.  Each column contains
-a checkbox which is left justified.  Currently left justification is used
-for consistency of location over the column in which it presides.
+=item $links if defined we will output links to each resource.
 
 =back
 
 =cut
 
-sub CreateColumnSelectors {
-    my ($infoHeadings, $sequenceHeadings, $sequenceKeys)=@_;
-
-    my $present = '';
-    for(my $index=0; $index<(scalar @$infoHeadings); $index++) {
-        $present .= '<td align="left">';
-        $present .= '<input type="checkbox" checked="on" ';
-        $present .= 'name="HeadingColumn'.$infoHeadings->[$index].'" />';
-        $present .= '</td>'."\n";
-    }
-
-    for(my $index=0; $index<(scalar @$sequenceHeadings); $index++) {
-        $present .= '<td align="left">';
-        $present .= '<input type="checkbox" checked="on" ';
-        $present .= 'name="SequenceColumn'.$sequenceKeys->[$index].'" />';
-        $present .= '</td>'."\n";
-    }
-
-    return $present;
-}
-
-#---- END Student Assessment Web Page ----------------------------------------
-
-#---- Student Assessment Worker Functions ------------------------------------
-
-sub FindSelectedStudent {
-    my($cache, $selectedName, $students)=@_;
-
-    if($selectedName eq 'All Students' ||
-       $selectedName eq 'No Student Selected') {
-        return $selectedName;
-    }
-
-    for(my $index=0; $index<(scalar @$students); $index++) {
-        my $fullname = $cache->{$students->[$index].':fullname'};
-        if($fullname eq $selectedName) {
-            if($cache->{'StudentAssessmentMove'} eq 'next') {
-                if($index == ((scalar @$students) - 1)) {
-                    $selectedName = $students->[0];
-                    return $selectedName;
+#######################################################
+#######################################################
+sub StudentTriesOnSequence {
+    my ($student,$studentdata,$seq,$links) = @_;
+    $links = 'no' if (! defined($links));
+    my $Str = '';
+    my ($sum,$max) = (0,0);
+    my $performance_length = 0;
+    my @TriesData = ();
+    my $tries;
+    foreach my $resource (@{$seq->{'contents'}}) {
+        next if ($resource->{'type'} ne 'assessment');
+        my $resource_data = $studentdata->{$resource->{'symb'}};
+        my $value = '';
+        foreach my $partnum (@{$resource->{'parts'}}) {
+            $tries = undef;
+            $max++;
+            $performance_length++;
+            my $symbol = ' '; # default to space
+            #
+            my $awarded = 0;
+            if (exists($resource_data->{'resource.'.$partnum.'.awarded'})) {
+                $awarded = $resource_data->{'resource.'.$partnum.'.awarded'};
+                $awarded = 0 if (! $awarded);
+            }
+            #
+            my $status = '';
+            if (exists($resource_data->{'resource.'.$partnum.'.solved'})) {
+                $status = $resource_data->{'resource.'.$partnum.'.solved'};
+            }
+            #
+            my $tries = 0;
+            if(exists($resource_data->{'resource.'.$partnum.'.tries'})) {
+                $tries = $resource_data->{'resource.'.$partnum.'.tries'};
+            }
+            #
+            if ($awarded > 0) {
+                # The student has gotten the problem correct to some degree
+                if ($status eq 'excused') {
+                    $symbol = 'x';
+                    $max--;
+                } elsif ($status eq 'correct_by_override') {
+                    $symbol = '+';
+                    $sum++;
+                } elsif ($tries > 0) {
+                    if ($tries > 9) {
+                        $symbol = '*';
+                    } else {
+                        $symbol = $tries;
+                    }
+                    $sum++;
                 } else {
-                    $selectedName = $students->[$index+1];
-                    return $selectedName;
+                    $symbol = '+';
+                    $sum++;
                 }
-            } elsif($cache->{'StudentAssessmentMove'} eq 'previous') {
-                if($index == 0) {
-                    $selectedName = $students->[-1];
-                    return $selectedName;
+            } else {
+                # The student has the problem incorrect or it is ungraded
+                if ($status eq 'excused') {
+                    $symbol = 'x';
+                    $max--;
+                } elsif ($status eq 'incorrect_by_override') {
+                    $symbol = '-';
+                } elsif ($status eq 'ungraded_attempted') {
+                    $symbol = '#';
+                } elsif ($status eq 'incorrect_attempted' ||
+                         $tries > 0)  {
+                    $symbol = '.';
                 } else {
-                    $selectedName = $students->[$index-1];
-                    return $selectedName;
+                    # Problem is wrong and has not been attempted.
+                    $symbol=' ';
                 }
-            } else {
-                $selectedName = $students->[$index];
-                return $selectedName;
             }
-            last;
+            #
+            if (! defined($tries)) {
+                $tries = $symbol;
+            }
+            push (@TriesData,$tries);
+            #
+            if ( ($links eq 'yes' && $symbol ne ' ') ||
+                 ($links eq 'all')) {
+                if (length($symbol) > 1) {
+                    &Apache::lonnet::logthis('length of symbol "'.$symbol.'" > 1');
+                }
+                $symbol = '<a href="/adm/grades'.
+                    '?symb='.&Apache::lonnet::escape($resource->{'symb'}).
+                        '&student='.$student->{'username'}.
+                            '&userdom='.$student->{'domain'}.
+                                '&command=submission">'.$symbol.'</a>';
+            }
+            $value .= $symbol;
         }
+        $Str .= $value;
     }
-
-    return 'No Student Selected';
+    if ($seq->{'randompick'}) {
+        $max = $seq->{'randompick'};
+    }
+    return ($Str,$performance_length,$sum,$max,\@TriesData);
 }
 
+#######################################################
+#######################################################
+
 =pod
 
-=item &ShouldShowColumn()
+=item &StudentPerformanceOnSequence()
 
-Determine if a specified column should be shown on the chart.
+Inputs:
 
 =over 4
 
-Input: $cache, $test
+=item $student
 
-$cache: A pointer to the hash tied to the cached data
+=item $studentdata Hash ref to all student data
 
-$test: The form name of the column (heading.$headingIndex) or 
-(sequence.$sequenceIndex)
+=item $seq Hash ref, the sequence we are working on
 
-Output: 0 (false), 1 (true)
+=item $links if defined we will output links to each resource.
 
 =back
 
 =cut
 
-sub ShouldShowColumns {
-    my ($cache,$headings,$cacheKey)=@_;
-
-    my @infoKeys=();
-    my @infoHeadings=();
+#######################################################
+#######################################################
+sub StudentPerformanceOnSequence {
+    my ($student,$studentdata,$seq,$links) = @_;
+    $links = 'no' if (! defined($links));
+    my $Str = ''; # final result string
+    my ($score,$max) = (0,0);
+    my $performance_length = 0;
+    my $symbol;
+    my @ScoreData = ();
+    my $partscore;
+    foreach my $resource (@{$seq->{'contents'}}) {
+        next if ($resource->{'type'} ne 'assessment');
+        my $resource_data = $studentdata->{$resource->{'symb'}};
+        foreach my $part (@{$resource->{'parts'}}) {
+            $partscore = undef;
+            my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
+                                              $resource->{'symb'},
+                                              $student->{'domain'},
+                                              $student->{'username'},
+                                              $student->{'section'});
+            if (!defined($weight) || ($weight eq '')) { 
+                $weight=1;
+            }
+            #
+            $max += $weight; # see the 'excused' branch below...
+            $performance_length++; # one character per part
+            $symbol = ' '; # default to space
+            #
+            my $awarded = 0;
+            if (exists($resource_data->{'resource.'.$part.'.awarded'})) {
+                $awarded = $resource_data->{'resource.'.$part.'.awarded'};
+                $awarded = 0 if (! $awarded);
+            }
+            #
+            $partscore = $weight*$awarded;
+            $score += $partscore;
+            $symbol = $partscore; 
+            if (abs($symbol - sprintf("%.0f",$symbol)) < 0.001) {
+                $symbol = sprintf("%.0f",$symbol);
+            }
+            if (length($symbol) > 1) {
+                $symbol = '*';
+            }
+            if (exists($resource_data->{'resource.'.$part.'.solved'})) {
+                my $status = $resource_data->{'resource.'.$part.'.solved'};
+                if ($status eq 'excused') {
+                    $symbol = 'x';
+                    $max -= $weight; # Do not count 'excused' problems.
+                }
+            } else {
+                # Unsolved.  Did they try?
+                if (exists($resource_data->{'resource.'.$part.'.tries'})){
+                    $symbol = '.';
+                } else {
+                    $symbol = ' ';
+                }
+            }
+            #
+            if (! defined($partscore)) {
+                $partscore = $symbol;
+            }
+            push (@ScoreData,$partscore);
+            #
+            if ( ($links eq 'yes' && $symbol ne ' ') || ($links eq 'all')) {
+                $symbol = '<a href="/adm/grades'.
+                    '?symb='.&Apache::lonnet::escape($resource->{'symb'}).
+                    '&student='.$student->{'username'}.
+                    '&userdom='.$student->{'domain'}.
+                    '&command=submission">'.$symbol.'</a>';
+            }
+            $Str .= $symbol;
+        }
+    }
+    return ($Str,$performance_length,$score,$max,\@ScoreData);
+}
 
-    my @sequenceKeys=();
-    my @sequenceHeadings=();
+#######################################################
+#######################################################
 
-    my %doNotShow;
+=pod
 
-    my $index;
-    my $count = 0;
-    my $check = '';
-    for($index=0; $index < scalar @$headings; $index++) {
-        $check = 'HeadingColumn'.$headings->[$index];
-        if($cache->{'HeadingsFound'} =~ /$check/) {
-            push(@infoHeadings, $headings->[$index]);
-            push(@infoKeys, $cacheKey->[$index]);
-        } else {
-            $doNotShow{$count.':name'} = $headings->[$index];
-            $doNotShow{$count.':id'} = 'HeadingColumn'.$headings->[$index];
-            $count++;
-        }
-    }
+=item &CreateLegend()
 
-    foreach my $sequence (split(/\:/,$cache->{'orderedSequences'})) {
-        $check = 'SequenceColumn'.$sequence;
-        if($cache->{'SequencesFound'} eq 'All Sequences' || 
-           $cache->{'SequencesFound'} =~ /$check/) {
-            push(@sequenceHeadings, $cache->{$sequence.':title'});
-            push(@sequenceKeys, $sequence);
-        } else {
-            $doNotShow{$count.':name'} = $cache->{$sequence.':title'};
-            $doNotShow{$count.':id'} = 'SequenceColumn'.$sequence;
-            $count++;
-        }
-    }
+This function returns a formatted string containing the legend for the
+chart.  The legend describes the symbols used to represent grades for
+problems.
 
-    $doNotShow{'count'} = $count;
+=cut
 
-    return (\@infoHeadings, \@infoKeys, \@sequenceHeadings, 
-            \@sequenceKeys, \%doNotShow);
+#######################################################
+#######################################################
+sub CreateLegend {
+    my $Str = "<p><pre>".
+              "   1  correct by student in 1 try\n".
+              "   7  correct by student in 7 tries\n".
+              "   *  correct by student in more than 9 tries\n".
+	      "   +  correct by hand grading or override\n".
+              "   -  incorrect by override\n".
+	      "   .  incorrect attempted\n".
+	      "   #  ungraded attempted\n".
+              "      not attempted (blank field)\n".
+	      "   x  excused".
+              "</pre><p>";
+    return $Str;
 }
 
-#---- END Student Assessment Worker Functions --------------------------------
+#######################################################
+#######################################################
+
+=pod 
+
+=back
+
+=cut
+
+#######################################################
+#######################################################
 
 1;
+
 __END__