--- loncom/interface/statistics/lonstudentsubmissions.pm	2004/09/01 21:13:04	1.15
+++ loncom/interface/statistics/lonstudentsubmissions.pm	2006/05/05 20:03:43	1.44
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonstudentsubmissions.pm,v 1.15 2004/09/01 21:13:04 matthew Exp $
+# $Id: lonstudentsubmissions.pm,v 1.44 2006/05/05 20:03:43 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -27,7 +27,7 @@
 package Apache::lonstudentsubmissions;
 
 use strict;
-use Apache::lonnet();
+use Apache::lonnet;
 use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
@@ -38,15 +38,10 @@ use HTML::Entities();
 use Time::Local();
 use Spreadsheet::WriteExcel();
 
-my @SubmitButtons = ({ name => 'PrevProblem',
-                       text => 'Previous Problem' },
-                     { name => 'NextProblem',
-                       text => 'Next Problem' },
-                     { name => 'break'},
-                     { name => 'SelectAnother',
+my @SubmitButtons = ({ name => 'SelectAnother',
                        text => 'Choose a different Problem' },
                      { name => 'Generate',
-                       text => 'Generate Spreadsheet'},
+                       text => 'Generate Report'},
                      );
 
 sub BuildStudentSubmissionsPage {
@@ -72,11 +67,12 @@ sub BuildStudentSubmissionsPage {
     }
     #
     my @CacheButtonHTML = 
-        &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status');
+        &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status',
+                                   '<h3>'.&mt('Loading student data').'</h3>');
     $r->rflush();
     #
-    if (exists($ENV{'form.problemchoice'}) && 
-        ! exists($ENV{'form.SelectAnother'})) {
+    if (exists($env{'form.problemchoice'}) && 
+        ! exists($env{'form.SelectAnother'})) {
         foreach my $button (@SubmitButtons) {
             if ($button->{'name'} eq 'break') {
                 $r->print("<br />\n");
@@ -90,469 +86,721 @@ sub BuildStudentSubmissionsPage {
             $r->print($html.('&nbsp;'x5));
         }
         #
-        $r->print('<hr />');
+        $r->print('<hr />'.$/);
         $r->rflush();
         #
-        # Determine which problem we are to analyze
-        my $current_problem = &Apache::lonstathelpers::get_target_from_id
-            ($ENV{'form.problemchoice'});
-        #
-        my ($prev,$curr,$next) = 
-            &Apache::lonstathelpers::get_prev_curr_next($current_problem,
-                                                        '.',
-                                                        'response',
-                                                        );
-        if (exists($ENV{'form.PrevProblem'}) && defined($prev)) {
-            $current_problem = $prev;
-        } elsif (exists($ENV{'form.NextProblem'}) && defined($next)) {
-            $current_problem = $next;
-        } else {
-            $current_problem = $curr;
+        # Determine which problems we are to analyze
+        my @Symbs = 
+            &Apache::lonstathelpers::get_selected_symbs('problemchoice');
+        foreach my $selected (@Symbs) {
+            $r->print('<input type="hidden" name="problemchoice" value="'.
+                      $selected.'" />'.$/);
         }
         #
-        # Store the current problem choice and send it out in the form
-        $ENV{'form.problemchoice'} = 
-            &Apache::lonstathelpers::make_target_id($current_problem);
-        $r->print('<input type="hidden" name="problemchoice" value="'.
-                  $ENV{'form.problemchoice'}.'" />');
-        #
-        if (! defined($current_problem->{'resource'})) {
+        # Get resource objects
+        my $navmap = Apache::lonnavmaps::navmap->new();
+        if (!defined($navmap)) {
+            $r->print('<h1>'.&mt("Internal error").'</h1>');
+            return;
+        }
+        my %already_seen;
+        my @Problems;
+        foreach my $symb (@Symbs) {
+            my $resource = $navmap->getBySymb($symb);
+            push(@Problems,$resource);
+        }
+        # 
+        $r->print('<h4>'.
+                  &Apache::lonstatistics::section_and_enrollment_description().
+                  '</h4>');
+        if (! scalar(@Problems) || ! defined($Problems[0])) {
             $r->print('resource is undefined');
         } else {
-            my $resource = $current_problem->{'resource'};
-            $r->print('<h1>'.$resource->{'title'}.'</h1>');
-            $r->print('<h3>'.$resource->{'src'}.'</h3>');
-            if ($ENV{'form.renderprob'} eq 'true') {
-                $r->print(&Apache::lonstathelpers::render_resource($resource));
-            }
-            $r->rflush();
-            my %Data = &Apache::lonstathelpers::get_problem_data
-                ($resource->{'src'});
-            my $ProblemData = $Data{$current_problem->{'part'}.
-                                    '.'.
-                                    $current_problem->{'respid'}};
-            &prepare_html_output($r,$current_problem,
-                                  $ProblemData,\@Students);
-#            &prepare_excel_output($r,$current_problem,
-#                                  $ProblemData,\@Students);
+            if (scalar(@Problems) == 1) {
+                my $resource = $Problems[0];
+                $r->print('<h1>'.$resource->title.'</h1>');
+                $r->print('<h3>'.$resource->src.'</h3>');
+                if ($env{'form.renderprob'} eq 'true') {
+                    $r->print(&Apache::lonstathelpers::render_resource($resource));
+                    $r->rflush();
+                }
+            }
+            if ($env{'form.output'} eq 'excel') {
+                &prepare_excel_output($r,\@Problems,\@Students);
+            } elsif ($env{'form.output'} eq 'csv') {
+                &prepare_csv_output($r,\@Problems,\@Students);
+            } else {
+                &prepare_html_output($r,\@Problems,\@Students);
+            }
         }
         $r->print('<hr />');
     } else {
         $r->print('<input type="submit" name="Generate" value="'.
-                  &mt('Generate Spreadsheet').'" />');
+                  &mt('Prepare Report').'" />');
         $r->print('&nbsp;'x5);
-        $r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
-        $r->print(&Apache::lonstathelpers::ProblemSelector('.'));
+        $r->print('<p>'.
+                  &mt('Computing correct answers greatly increasese the amount of time required to prepare a report.').
+                  '</p>');
+        $r->print('<p>'.
+                  &mt('please select problems and use the <b>Prepare Report</b> button to continue.').
+                  '</p>');
+        $r->print(&Apache::lonstathelpers::MultipleProblemSelector
+                  (undef,'problemchoice','Statistics'));
+    }
+}
+
+##
+## get_extra_response_headers
+##
+sub get_extra_response_headers {
+    my @extra_resp_headers;
+    if ($env{'form.correctans'} eq 'true') {
+        push(@extra_resp_headers,'Correct');
+    } 
+    if ($env{'form.prob_status'} eq 'true') {
+        push(@extra_resp_headers,'Award Detail'); 
+        push(@extra_resp_headers,'Time');
+        push(@extra_resp_headers,'Attempt');
+        push(@extra_resp_headers,'Awarded');
+    }
+    return @extra_resp_headers;
+}
+
+##
+## get_headers:
+##     return the proper headers for the given response 
+sub get_headers {
+    my ($prob,$partid,$respid,$resptype,$analysis,$output,$purpose,
+        @basic_headers) = @_;
+    my @headers;
+    if ($resptype eq 'essay' && $purpose eq 'display' &&
+        ($output eq 'html')) {# || scalar(@{$prob->parts})!=1)) {
+        @headers = ();
+    } elsif ($resptype =~ /^(option|match|rank)$/) {
+        my $prefix = '_';
+        if ($purpose eq 'display') {
+            $prefix = '';
+        }
+        my @foils = 
+            map { 
+                $prefix.$_; 
+            } sort(keys(%{$analysis->{$partid.'.'.$respid}->{'_Foils'}}));
+        if (scalar(@basic_headers) && $basic_headers[0] eq 'Correct') {
+            @foils = map { ($_ , $_.' Correct') } @foils;
+            shift(@basic_headers);  # Get rid of 'Correct'
+        }
+        @headers = (@foils,@basic_headers);
+    } elsif (lc($resptype) eq 'task') {
+        @headers = ('Grader','Status',@basic_headers,'Submission');
+    } else {
+        @headers = ('Submission',@basic_headers);
     }
+    return @headers;
 }
 
 #########################################################
 #########################################################
 ##
-##    prepare_html_output
+##    HTML Output Routines
 ##
 #########################################################
 #########################################################
 sub prepare_html_output {
-    my ($r,$problem,$ProblemData,$Students) = @_;
+    my ($r,$problems,$students) = @_;
     my $c = $r->connection();
-    my ($resource,$respid,$partid) = ($problem->{'resource'},
-                                      $problem->{'respid'},
-                                      $problem->{'part'});
-    $r->print('<h2>'.&mt('Student Responses').'</h2>');
-    #
-    if ($ENV{'form.correctans'} eq 'true') {
-        &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$Students,
-                                                   'Statistics',
-                                                   'stats_status');
-    }
     #
-    $r->rflush();
-    my $response_type;
-    for (my $i=0;
-         $i<scalar(@{$resource->{'partdata'}->{$partid}->{'ResponseIds'}});
-         $i++) {
-        if($resource->{'partdata'}->{$partid}->{'ResponseIds'}->[$i] eq $respid){
-            $response_type = 
-                $resource->{'partdata'}->{$partid}->{'ResponseTypes'}->[$i];
-            last;
+    # Set a flag for the case when there is just one problem
+    my $single_response = 0;
+    if (scalar(@$problems) == 1 &&
+        $problems->[0]->countResponses == 1) {
+        $single_response = 1;
+    }
+    #
+    # Compute the number of columns per response
+    my @extra_resp_headers = &get_extra_response_headers();
+    #
+    # Create the table header
+    my @student_columns = ('username','domain','id','section');
+    #
+    my %headers;
+    my $student_column_count = scalar(@student_columns);
+    $headers{'problem'} = qq{<th colspan="$student_column_count">\&nbsp;</th>};
+    foreach (@student_columns) {
+        $headers{'student'}.= '<th>'.ucfirst($_).'</th>';
+    }
+    #
+    # we put the headers into the %headers hash
+    my $total_col = scalar(@student_columns);
+    my $nonempty_part_headers = 0;
+    #
+    my %problem_analysis;
+    foreach my $prob (@$problems) {
+        my %analysis = &Apache::lonstathelpers::get_problem_data($prob->src);
+        $problem_analysis{$prob->src}=\%analysis;
+        #
+        my $prob_span = 0;
+        my $single_part = 0;
+        if (scalar(@{$prob->parts}) == 1) {
+            $single_part = 1;
+        }
+        foreach my $partid (@{$prob->parts}) {
+            my $part_span = 0;
+            my $responses = [$prob->responseIds($partid)];
+            my $resptypes = [$prob->responseType($partid)];
+            for (my $i=0;$i<scalar(@$responses);$i++) {
+                my $respid = $responses->[$i];
+                my @headers = &get_headers($prob,$partid,$respid,
+                                           $resptypes->[$i],
+                                           $problem_analysis{$prob->src},
+                                           'html','display',
+                                           @extra_resp_headers);
+                if (scalar(@headers)>0) {
+                    $total_col += scalar(@headers);
+                    $part_span += scalar(@headers);
+                    $headers{'response'} .=
+                        '<th colspan="'.scalar(@headers).'">'.
+                        &mt('Response [_1]',$responses->[$i]).'</th>';
+                    $headers{'student'}.= '<th>'.join('</th><th><nobr>',
+                                                      @headers).
+                                                          '</nobr></th>';
+                }
+            }
+            if ($part_span == 0) {
+                next;
+            }
+            if (! $single_part) {
+                my $tmpname = $partid;
+                if ($partid =~/^\d+$/) {
+                    $tmpname = $prob->part_display($partid);
+                }
+                if ($tmpname !~ /^part/) {
+                    $tmpname = 'Part '.$tmpname;
+                }
+                $headers{'part'} .= qq{<th colspan="$part_span">$tmpname</th>};
+                $nonempty_part_headers = 1;
+            } else {
+                $headers{'part'} .= qq{<th colspan="$part_span">&nbsp</th>};
+            }
+            $prob_span += $part_span;
+        }
+        my $title = $prob->compTitle;
+        if ($prob_span > 0) {
+            $headers{'problem'}.= qq{<th colspan="$prob_span">$title</th>};
+        } elsif ($single_response) {
+            $prob_span = scalar(@student_columns);
+            $headers{'problem'} = qq{<th colspan="$prob_span">$title</th>};
         }
     }
-    if (! defined($response_type)) {
-        $r->print('<h2>'.&mt('Unable to determine response type').'</h2>');
-    } else {
-        my $count = 0;
-        my $header;
-        if ($response_type eq 'essay') {
-            $header = &html_essay_header();
-        } elsif ($response_type eq 'radiobutton') {
-            $header = &html_radiobutton_header();
-        } elsif ($response_type eq 'option') {
-            $header = &html_option_header();
-        } else {
-            $header = &html_generic_header();
+    if (exists($headers{'part'})) {
+        $headers{'part'} = qq{<th colspan="$student_column_count">\&nbsp;</th>}.
+            $headers{'part'};
+    }
+    if (exists($headers{'response'})) {
+        $headers{'response'}=
+            qq{<th colspan="$student_column_count">\&nbsp;</th>}.
+            $headers{'response'};
+    }
+    my $full_header = $/.'<table>'.$/;
+    $full_header .= '<tr align="left">'.$headers{'problem'}.'</tr>'.$/;
+    if ($nonempty_part_headers) {
+        $full_header .= '<tr align="left">'.$headers{'part'}.'</tr>'.$/;
+    }
+    $full_header .= '<tr align="left">'.$headers{'response'}.'</tr>'.$/;
+    $full_header .= '<tr align="left">'.$headers{'student'}.'</tr>'.$/;
+    #
+    # Main loop
+    my $count;
+    $r->print($/.$full_header.$/);
+    my $row_class = 'odd';   # css 
+    foreach my $student (@$students) {
+        my $student_row_data;
+        if ($count++ >= 30) {
+            $r->print('</table>'.$/.$full_header.$/);
+            $count = 0;
+        }
+        last if ($c->aborted());
+        foreach my $field (@student_columns) {
+            $student_row_data .= 
+                '<td valign="top">'.$student->{$field}.'</td>';
         }
-        $header = '<tr>'.$header.'</tr>';
         #
-        $r->print($/.'<table>'.$/.$header.$/);
-        foreach my $student (@$Students) {
-            if ($count >= 50) {
-                $r->print('</table>'.$/.'<table>'.$/.$header.$/);
-                $count = 0;
-            }
-            last if ($c->aborted());
-            my $results = &Apache::loncoursedata::get_response_data_by_student
-                ($student,$resource->{'symb'},$respid);
-            next if (! defined($results) || ref($results) ne 'ARRAY');
-            for (my $i=0;$i<scalar(@$results);$i++) {
-                my $response = $results->[$i];
-                if ($ENV{'form.last_sub_only'} eq 'true' && 
-                    $i < (scalar(@$results)-1)) {
-                    next;
-                }
-                my $data;
-                $data->{'sname'} = $student->{'username'}.'@'.
-                    $student->{'domain'};
-                $data->{'time'} = &Apache::lonlocal::locallocaltime
-                    ($response->[&Apache::loncoursedata::RDs_timestamp()]);
-                $data->{'attempt'} = 
-                    $response->[&Apache::loncoursedata::RDs_tries()];
-                $data->{'submission'} = 
-                    $response->[&Apache::loncoursedata::RDs_submission()];
-                $data->{'correct'} = $student->{'answer'};
-                my $row;
-                if ($response_type eq 'essay') {
-                    $row = &html_essay($data);
-                } elsif ($response_type eq 'radiobutton') {
-                    $row = &html_radiobutton($data);
-                } elsif ($response_type eq 'option') {
-                    $row = &html_option($data);
-                } else {
-                    $row = &html_generic($data);
+        # Figure out what it is we need to output for this student
+        my @essays;
+        my %prob_data;
+        my $maxrow;
+        foreach my $prob (@$problems) {
+            $prob_data{$prob->symb}={};
+            foreach my $partid (@{$prob->parts}) {
+                my @responses = $prob->responseIds($partid);
+                my @response_type = $prob->responseType($partid);
+                for (my $i=0;$i<=$#responses;$i++) {
+                    my $respid  = $responses[$i];
+                    my $results = 
+                        &Apache::loncoursedata::get_response_data_by_student
+                        ($student,$prob->symb(),$respid);
+                    my $resptype = $response_type[$i];
+                    my @headers = &get_headers($prob,$partid,$respid,
+                                               $resptype,
+                                               $problem_analysis{$prob->src},
+                                               'html','normal',
+                                               @extra_resp_headers);
+                    my $width = scalar(@headers);
+                    next if ($width < 1);
+                    my $resp_data;
+                    $resp_data->{'fake'} = qq{<td colspan="$width">&nbsp;</td>};
+                    if (! defined($results)) {
+                        $results = [];
+                    }
+                    # 
+                    if (scalar(@$results) > $maxrow && $resptype ne 'essay') {
+                        $maxrow = scalar(@$results);
+                    }
+                    for (my $j=scalar(@$results)-1;$j>=0;$j--) {
+                        if ($env{'form.all_sub'} ne 'true') {
+                            next if ($j ne scalar(@$results)-1);
+                        }
+                        my $response = &hashify_response($results->[$j],
+                                                         $prob,
+                                                         $student,
+                                                         $partid,
+                                                         $respid);
+                        if ($resptype eq 'essay') {
+                            push(@essays,
+                                 &html_essay_results(\@headers,
+                                                     $prob,$partid,$respid,
+                                                     $response,
+                                                     $single_response).
+                                 '</td>');
+			} elsif (lc($resptype) eq 'task') {
+			    my $results = 
+				&html_task_results(\@headers,
+						   $prob,$partid,$respid,
+						   $response,$resptype);
+			    if ($results) {
+				push(@{$resp_data->{'real'}},$results);
+			    }
+                        } else {
+                            push(@{$resp_data->{'real'}},
+                                 &html_non_essay_results(\@headers,
+                                                         $prob,$partid,$respid,
+                                                         $response,$resptype));
+                        }
+                    }
+                    $prob_data{$prob->symb}->{$partid}->{$respid}=$resp_data;
+                } # end of $i loop
+            } # end of partid loop
+        } # end of prob loop
+        #
+        # if there is no data, skip this student.
+        next if (! $maxrow && ! scalar(@essays));
+        #
+        # Go through the problem data and output a row.
+        if ($row_class eq 'even') {
+            $row_class = 'odd'; 
+        } else {
+            $row_class = 'even'; 
+        }
+        my $printed_something;
+        for (my $rows_output = 0;$rows_output<$maxrow;$rows_output++) {
+            my $html;
+            my $no_data = 1;
+            foreach my $prob (@$problems) {
+                foreach my $partid (@{$prob->parts}) {
+                    my @responses     = $prob->responseIds($partid);
+                    my @response_type = $prob->responseType($partid);
+                    for (my $i=0;$i<=$#responses;$i++) {
+                        my $respid   = $responses[$i];
+                        my $resp_data = 
+                            $prob_data{$prob->symb}->{$partid}->{$respid};
+                        next if ($response_type[$i] eq 'essay');
+                        if (defined($resp_data->{'real'}->[$rows_output])) {
+                            $html .= $resp_data->{'real'}->[$rows_output];
+                            $no_data = 0;
+                        } else {
+                            $html .= $resp_data->{'fake'};
+                        }
+                    }
                 }
-                $r->print($row.$/);
-                $count++;
+            }
+            if (! $no_data) {
+                $r->print(qq{<tr class="$row_class">$student_row_data$html</tr>}.$/);
+                $printed_something=1;
             }
         }
-        $r->print('</table>'.$/);
-    }
+        if (@essays) {
+            my $tr = qq{<tr class="$row_class">};
+            my $td = qq{<td  valign="top" class="essay" colspan="$total_col">};
+            if (! $printed_something) {
+                $r->print($tr.$student_row_data.'</tr>'.$/);
+            }
+            $r->print($tr.$td.
+                      join('</td></tr>'.$/.$tr.$td,@essays).'</td></tr>'.$/);
+            undef(@essays);
+        }
+    } # end of student loop
     return;
 }
 
+sub hashify_response {
+    my ($response,$prob,$student,$partid,$respid) =@_;
+    my $resp_hash = {};
+    if ($env{'form.correctans'} eq 'true') {
+        $resp_hash->{'Correct'} = 
+            &Apache::lonstathelpers::get_student_answer
+            ($prob,$student->{'username'},$student->{'domain'},
+             $partid,$respid);
+    }
+    $resp_hash->{'Submission'} = 
+        $response->[&Apache::loncoursedata::RDs_submission()];
+    $resp_hash->{'Time'} = 
+        $response->[&Apache::loncoursedata::RDs_timestamp()];
+    $resp_hash->{'Attempt'} =
+        $response->[&Apache::loncoursedata::RDs_tries()];
+    $resp_hash->{'Awarded'} = 
+        $response->[&Apache::loncoursedata::RDs_awarded()];
+    if ($prob->is_task()) {
+	$resp_hash->{'Grader'} = 
+	    $response->[&Apache::loncoursedata::RDs_response_eval_2()];
+	if ($resp_hash->{'Attempt'} eq '0') {
+	    $resp_hash->{'Attempt'} = '';
+	}
+	$resp_hash->{'Award Detail'} = 
+	    $response->[&Apache::loncoursedata::RDs_part_award()];
+	$resp_hash->{'Status'} = 
+	    $response->[&Apache::loncoursedata::RDs_response_eval()];
+    } else {
+	$resp_hash->{'Award Detail'} = 
+	    $response->[&Apache::loncoursedata::RDs_awarddetail()];
+    }
+
+    return $resp_hash;
+}
+
 #####################################################
 ##
 ##     HTML helper routines
 ##
 #####################################################
-my @FullHeaders = (
-                   {name=>'sname',
-                    display=>'Student'},
-                   {name => 'id',
-                    display => 'Id'},
-                   {name => 'time',
-                    display =>'Time'},
-                   {name => 'attempt',
-                    display =>'Attempt'},
-                   {name => 'grading',
-                    display =>'Grading'},
-                   );
-
-sub html_essay_header {
-    my $header;
-    if ($ENV{'form.subdata'} eq 'true') {
-        foreach (@FullHeaders) {
-            $header .= '<th>'.&mt($_->{'display'}).'</th>';
+sub html_essay_results {
+    my ($headers,$prob,$partid,$respid,$response,$single_response)=@_;
+    if (! ref($headers) || ref($headers) ne 'ARRAY') {
+        return '';
+    }
+    # Start of telling them what problem, part, and response
+    my $Str;
+    if (! $single_response) {
+        my $id = $prob->compTitle;
+        if (defined($partid) && $partid ne '0') {
+            $id .= ' '.$prob->part_display($partid);
         }
-    } else {
-        $header = '<th>'.&mt('Username and Submission').'</th>';
+        if (defined($respid)) {
+            $id .= ' '.$respid;
+        }
+        $Str .= '<nobr>'.$id.'</nobr>'.('&nbsp;'x4);
     }
-    return $header;
-}
-
-sub html_essay {
-    my ($data)=@_;
     #
-    $data->{'submission'} =~ s|\\r\\n|$/|g;
-    $data->{'submission'} = 
-        &HTML::Entities::encode($data->{'submission'},'<>&"');
-    $data->{'submission'} =~ s|$/\s*$/|$/</p><p>$/|g;
-    $data->{'submission'} =~ s|\\||g;
-    $data->{'submission'} = '<p>'.$data->{'submission'}.'</p>';
-    #
-    my $Str  = '<tr>';
-    if ($ENV{'form.subdata'} eq 'true') {
-        $Str .= 
-            '<td><b>'.$data->{'sname'}.'</b></td>'.
-            '<td>'.$data->{'time'}.'</td>'.
-            '<td>'.$data->{'attempt'}.'</td>';
-        $Str .= '</tr>';
-        $Str .= '<tr><td colspan="'.scalar(@FullHeaders).'">'.
-            $data->{'submission'}.'</td>';
-    } else {
-        $Str .= '<td><b>'.$data->{'sname'}.'</b>'.
-            $data->{'submission'}.'</td>';
-    }
-    if ($ENV{'form.correctans'} eq 'true') {
-        $Str .= '</tr>';
-        if (defined($data->{'correct'}) && $data->{'correct'} !~ /^\s*$/) {
-            $Str .= '<tr><td colspan="'.scalar(@FullHeaders).'">'.
-                '<b>'.&mt('Correct Answer:').'</b>'.$data->{'correct'}.'</td>';
-        }
+    shift(@$headers); # Get rid of the Submission header
+    my $correct = '';
+    if ($headers->[0] eq 'Correct') {
+        $correct = &html_format_essay_sub($response->{'Correct'});
+        shift(@$headers);
+    }
+    $Str .= '<nobr>'.
+        join('',
+             map {
+                 ('&nbsp;'x4).&mt($_.': [_1]',$response->{$_});
+             } @$headers).'</nobr>';
+    if (@$headers || ! $single_response) {
+        $Str .= '<br />';
     }
-    $Str .= '</tr>';
+    $Str .= &html_format_essay_sub($response->{'Submission'});
     #
+    if (defined($correct) && $correct !~ /^\s*$/) {
+        $Str .= '<hr /><b>'.&mt('Correct').'</b>'.$correct
+    }
     return $Str;
 }
 
-sub html_radiobutton_header {
-    my $header;
-    if ($ENV{'form.subdata'} eq 'true') {
-        foreach (@FullHeaders) {
-            $header .= '<th>'.&mt($_->{'display'}).'</th>';
-        }
-    } else {
-        $header = 
-            '<th>'.&mt('Username').'</th>';
-    }
-    $header .='<th>'.&mt('Submission').'</th>';
-    if ($ENV{'form.correctans'} eq 'true') {
-        $header .= '<th>'.&mt('Correct').'</th>';
-    }
-    return $header;
-}
-
-sub html_radiobutton {
-    my ($data)=@_;
-    #
-    $data->{'submission'} =~ s/=([^=])$//;
-    #
-    my $Str  = '<tr>';
-    if ($ENV{'form.subdata'} eq 'true') {
-        $Str .= 
-            '<td>'.'<b>'.$data->{'sname'}.'</b></td>'.
-            '<td>'.$data->{'time'}.'</td>'.
-            '<td>'.$data->{'attempt'}.'</td>';
-        $Str .= '<td>'.$data->{'submission'}.'</td>';
-        if ($ENV{'form.correctans'} eq 'true') {
-            $Str .= '<td>'.$data->{'correct'}.'</td>';
-        }
-    } else {
-        $Str .= '<td><b>'.$data->{'sname'}.'</b></td>';
-        $Str .= '<td>'.$data->{'submission'}.'</td>';
-        if ($ENV{'form.correctans'} eq 'true') {
-            $Str .= '<td>'.$data->{'correct'}.'</td>';
-        }
-    }
-    $Str .= '</tr>';
-    #
-    return $Str;
+sub html_format_essay_sub {
+    my ($submission) = @_;
+    return '' if (! defined($submission) || $submission eq '');
+    $submission = &HTML::Entities::decode($submission);
+    $submission =~ s/\\\"/\"/g;
+    $submission =~ s/\\\'/\'/g;
+    $submission =~ s|\\r\\n|$/|g;
+    $submission = &HTML::Entities::encode($submission,'<>&"');
+    $submission =~ s|$/\s*$/|$/</p><p>$/|g;
+    $submission =~ s|\\||g;
+    $submission = '<p>'.$submission.'</p>';
+    return $submission;
 }
 
-sub html_generic_header {
-    my $header;
-    if ($ENV{'form.subdata'} eq 'true') {
-        foreach (@FullHeaders) {
-            $header .= '<th>'.&mt($_->{'display'}).'</th>';
-        }
-    } else {
-        $header = 
-            '<th>'.&mt('Username').'</th>';
-    } 
-    $header .= '<th>'.&mt('Submission').'</th>';
-    if ($ENV{'form.correctans'} eq 'true') {
-        $header .= '<th>'.&mt('Correct').'</th>';
-    }
-    return $header;
-}
-
-sub html_generic {
-    my ($data)=@_;
-    $data->{'submission'} = &Apache::lonnet::unescape($data->{'submission'});
-    my $Str  = '<tr>';
-    if ($ENV{'form.subdata'} eq 'true') {
-        $Str .= 
-            '<td><b>'.$data->{'sname'}.'</b></td>'.
-            '<td>'.$data->{'time'}.'</td>'.
-            '<td>'.$data->{'attempt'}.'</td>';
-    } else {
-        $Str .= '<td><b>'.$data->{'sname'}.'</b></td>';
+sub html_task_results {
+    my ($headers,$prob,$partid,$respid,$response,$resptype) = @_;
+    if (! ref($headers) || ref($headers) ne 'ARRAY' || ! scalar(@$headers)) {
+        return '';
     }
-    $Str .= '<td>'.$data->{'submission'}.'</td>';
-    if ($ENV{'form.correctans'} eq 'true') {
-        $Str .= '<td>'.$data->{'correct'}.'</td>';
-    }
-    $Str .= '</tr>';
-    return $Str;
+
+    my @values;
+    @values = map { $response->{$_}; } @$headers;
+
+    my $td = '<td valign="top">';
+    my $str = $td.join('</td>'.$td,@values).'</td>';
+    return $str;
 }
 
-sub html_option_header {
-    my $header;
-    if ($ENV{'form.subdata'} eq 'true') {
-        foreach (@FullHeaders) {
-            $header .= '<th>'.&mt($_->{'display'}).'</th>';
+sub html_non_essay_results {
+    my ($headers,$prob,$partid,$respid,$response,$resptype) = @_;
+    if (! ref($headers) || ref($headers) ne 'ARRAY' || ! scalar(@$headers)) {
+        return '';
+    }
+    # 
+    my $submission = &HTML::Entities::decode(&Apache::lonnet::unescape($response->{'Submission'})); 
+    return '' if (! defined($submission) || $submission eq '');
+    $submission =~ s/\\\"/\"/g;
+    $submission =~ s/\\\'/\'/g;
+    if ($resptype eq 'radiobutton') {
+        $submission = &HTML::Entities::encode($submission,'<>&"');
+        $submission =~ s/=([^=])$//;
+        $submission = '<nobr>'.$submission.'</nobr>';
+    }
+    $response->{'Submission'} = $submission;
+    #
+    my @values;
+    if ($resptype =~ /^(option|match|rank)$/) {
+        my %submission = 
+            map { 
+                my ($foil,$value) = split('=',&Apache::lonnet::unescape($_));
+                ($foil,$value);
+            } split('&',$response->{'Submission'});
+        my %correct;
+        if (exists($response->{'Correct'})) {
+            %correct = 
+                map { 
+                    my ($foil,$value)=split('=',&Apache::lonnet::unescape($_));
+                    ($foil,$value);
+                } split('&',$response->{'Correct'});
+        }
+        #
+        foreach my $original_header (@$headers) {
+            if ($original_header =~ /^_/) {
+                # '_' denotes a foil column
+                my ($header) = ($original_header =~ m/^_(.*)$/);
+                my $option = '';
+                if ( my ($foil) = ($header =~ /(.*) Correct$/)) {
+                    if (exists($correct{$foil})) {
+                        $option = $correct{$foil};
+                    }
+                } elsif (exists($submission{$header})) {
+                    $option = $submission{$header};
+                }
+                push(@values,&HTML::Entities::encode($option));
+            } elsif ($original_header eq 'Time') {
+                push(@values,&Apache::lonlocal::locallocaltime($response->{$original_header}));
+            } else {
+                # A normal column
+                push(@values,$response->{$original_header});
+            }
         }
     } else {
-        $header = 
-            '<th>'.&mt('Username').'</th>';
-    } 
-    $header .= '<th>'.&mt('Submission').'</th>';
-    if ($ENV{'form.correctans'} eq 'true') {
-        $header .= '<th>'.&mt('Correct').'</th>';
-    }
-    return $header;
-}
-
-sub html_option {
-    my ($data)=@_;
-    $data->{'submission'} = '<ul class="studentans">'.
-        '<li>'.join('</li><li>',
-                    map { 
-                        &Apache::lonnet::unescape($_) ;
-                    } sort split('&',$data->{'submission'})).
-                        '</li><ul>';
-    $data->{'correct'} = '<ul class="correctans">'.
-        '<li>'.join('</li><li>',
-                    map { 
-                        &Apache::lonnet::unescape($_) ;
-                    } sort split('&',$data->{'correct'})).'</li></ul>';
-    my $Str  = '<tr>';
-    if ($ENV{'form.subdata'} eq 'true') {
-        $Str .= 
-            '<td><b>'.$data->{'sname'}.'</b></td>'.
-            '<td>'.$data->{'time'}.'</td>'.
-            '<td>'.$data->{'attempt'}.'</td>';
-    } else {
-        $Str .= '<td><b>'.$data->{'sname'}.'</b></td>';
+        @values = map { $response->{$_}; } @$headers;
     }
-    $Str .= '<td>'.$data->{'submission'}.'</td>';
-    if ($ENV{'form.correctans'} eq 'true') {
-        $Str .= '<td>'.$data->{'correct'}.'</td>';
-    }
-    $Str .= '</tr>';
-    return $Str;
+    my $td = '<td valign="top">';
+    my $str = $td.join('</td>'.$td,@values).'</td>';
+    return $str;
 }
 
 
-=pod
-
-    my @Columns;
-    push(@Columns,'username');
-    push(@Columns,'domain');
-    push(@Columns,'attempt');
-    push(@Columns,'time');
-    push(@Columns,'submission');
-    if ($ENV{'form.correctans'} eq 'true') { push(@Columns,'correct'); }
-    push(@Columns,'grading');
-    push(@Columns,'awarded');
-    my $awarded_col = $#Columns;
-    push(@Columns,'weight');
-    my $weight_col  = $#Columns;
-    push(@Columns,'score');
+#########################################################
+#########################################################
+##
+##    Excel Output Routines
+##
+#########################################################
+#########################################################
+sub prepare_excel_output {
+    my ($r,$Problems,$Students) = @_;
+    my $c = $r->connection();
     #
-    # Create excel worksheet
-    my $filename = '/prtspool/'.
-        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
-        time.'_'.rand(1000000000).'.xls';
-    my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
-    if (! defined($workbook)) {
-        $r->log_error("Error creating excel spreadsheet $filename: $!");
-        $r->print('<p>'.&mt("Unable to create new Excel file.  ".
-                            "This error has been logged.  ".
-                            "Please alert your LON-CAPA administrator").
-                  '</p>');
-        return undef;
+    #
+    # Determine the number of columns in the spreadsheet
+    my $columncount = 3; # username, domain, id
+    my @extra_resp_headers = &get_extra_response_headers();
+    my $lastprob;
+    my %problem_analysis;
+    foreach my $prob (@$Problems) {
+        my %analysis = &Apache::lonstathelpers::get_problem_data($prob->src);
+        $problem_analysis{$prob->src}=\%analysis;
+        foreach my $partid (@{$prob->parts}) {
+            my $responses = [$prob->responseIds($partid)];
+            my $resptypes = [$prob->responseType($partid)];
+            for (my $i=0;$i<scalar(@$responses);$i++) {
+                my @headers = &get_headers($prob,$partid,$responses->[$i],
+                                           $resptypes->[$i],
+                                           $problem_analysis{$prob->src},
+                                           'excel','display',
+                                           @extra_resp_headers);
+                $columncount += scalar(@headers);
+            }
+        }
+        last if ($columncount > 255);
+        $lastprob = $prob;
+    }
+    if ($columncount > 255) {
+        $r->print('<h1>'.&mt('Unable to complete request').'</h1>'.$/.
+                  '<p>'.&mt('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>'.$/.
+                  '<p>'.&mt('Consider selecting fewer problems to generate reports on, or reducing the number of items per problem.  Or use HTML or CSV output.').'</p>'.$/.
+                  '<p>'.&mt('The last problem that will fit in the current spreadsheet is [_1].',$lastprob->compTitle).'</p>');
+        $r->rflush();
+        return;
     }
     #
-    $workbook->set_tempdir('/home/httpd/perl/tmp');
+    # Print out a message telling them what we are doing
+    if (scalar(@$Problems) > 1) {
+        $r->print('<h2>'.
+                  &mt('Preparing Excel spreadsheet of student responses to [_1] problems',
+                      scalar(@$Problems)).
+                  '</h2>');
+    } else {
+        $r->print('<h2>'.
+                  &mt('Preparing Excel spreadsheet of student responses').
+                  '</h2>');
+    }
+    $r->rflush();
     #
-    my $format = &Apache::loncommon::define_excel_formats($workbook);
+    # Create the excel spreadsheet
+    my ($workbook,$filename,$format) = 
+        &Apache::loncommon::create_workbook($r);
+    return if (! defined($workbook));
     my $worksheet  = $workbook->addworksheet('Student Submission Data');
     #
-    # Make sure we get new weight data instead of data on a 10 minute delay
-    &Apache::lonnet::clear_EXT_cache_status();
-    #
-    # Put on the standard headers and whatnot
-    my $rows_output=0;
-    $worksheet->write($rows_output++,0,$resource->{'title'},$format->{'h1'});
-    $worksheet->write($rows_output++,0,$resource->{'src'},$format->{'h3'});
+    # Add headers to the worksheet
+    my $rows_output = 0;
+    $worksheet->write($rows_output++,0,
+                    $env{'course.'.$env{'request.course.id'}.'.description'},
+                      $format->{'h1'});
     $rows_output++;
-    $worksheet->write_row($rows_output++,0,\@Columns,$format->{'bold'});
+    my $cols_output = 0;
+    my $title_row  = $rows_output++;
+    my $partid_row = $rows_output++;
+    my $respid_row = $rows_output++;
+    my $header_row = $rows_output++;
+    $worksheet->write($title_row ,0,'Problem Title',$format->{'bold'});
+    $worksheet->write($partid_row,0,'Part ID',$format->{'bold'});
+    $worksheet->write($respid_row,0,'Response ID',$format->{'bold'});
+    # Student headers
+    my @StudentColumns = ('username','domain','id','section');
+    foreach (@StudentColumns) {
+        $worksheet->write($header_row,$cols_output++,ucfirst($_),
+                          $format->{'bold'});
+    }
+    # Problem headers
+    my %start_col;
+    foreach my $prob (@$Problems) {
+        my $title = $prob->compTitle;
+        $worksheet->write($title_row,$cols_output,
+                          $title,$format->{'h3'});
+        foreach my $partid (@{$prob->parts}) {
+            $worksheet->write($partid_row,$cols_output,
+                              $prob->part_display($partid));
+            my $responses = [$prob->responseIds($partid)];
+            my $resptypes = [$prob->responseType($partid)];
+            for (my $i=0;$i<scalar(@$responses);$i++) {
+                $start_col{$prob->symb}->{$partid}->{$responses->[$i]}=
+                    $cols_output;
+                $worksheet->write($respid_row,$cols_output,
+                                  $resptypes->[$i].', '.$responses->[$i]);
+                my @headers = &get_headers($prob,$partid,$responses->[$i],
+                                           $resptypes->[$i],
+                                           $problem_analysis{$prob->src},
+                                           'excel','display',
+                                           @extra_resp_headers);
+                foreach my $text (@headers) {
+                    if ($text eq 'Time') {
+                        $worksheet->set_column($cols_output,$cols_output,undef,
+                                               $format->{'date'});
+                    } 
+                    $worksheet->write($header_row,$cols_output++,$text);
+                }
+            }
+        }
+    }
     #
     # Populate the worksheet with the student data
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,'Excel File Compilation Status',
+         'Excel File Compilation Progress', 
+         scalar(@$Students),'inline',undef,'Statistics','stats_status');
+    my $max_row = $rows_output;
     foreach my $student (@$Students) {
         last if ($c->aborted());
-        my $results = &Apache::loncoursedata::get_response_data_by_student
-            ($student,$resource->{'symb'},$respid);
-        my %row;
-        $row{'username'} = $student->{'username'};
-        $row{'domain'}   = $student->{'domain'};
-        $row{'correct'}  = $student->{'answer'};
-        $row{'weight'} = &Apache::lonnet::EXT
-            ('resource.'.$partid.'.weight',$resource->{'symb'},
-             undef,undef,undef);
-        if (! defined($results) || ref($results) ne 'ARRAY') {
-            $row{'score'} = '='.
-                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                    ($rows_output,$awarded_col)
-                .'*'.
-                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                    ($rows_output,$weight_col);
-            my $cols_output = 0;
-            foreach my $col (@Columns) {
-                if (! exists($row{$col})) {
-                    $cols_output++;
-                    next;
+        $cols_output = 0;
+        my $student_row = $max_row;
+        foreach my $field (@StudentColumns) {
+            $worksheet->write($student_row,$cols_output++,
+                              $student->{$field});
+        }
+        my $last_student_col = $cols_output-1;
+        foreach my $prob (@$Problems) {
+            foreach my $partid (@{$prob->parts}) {
+                my @Response = $prob->responseIds($partid);
+                my @ResponseType = $prob->responseType($partid);
+                for (my $i=0;$i<=$#Response;$i++) {
+                    my $respid   = $Response[$i];
+                    my $resptype = $ResponseType[$i];
+                    my $results = 
+                        &Apache::loncoursedata::get_response_data_by_student
+                        ($student,$prob->symb(),$respid);
+                    my @headers = &get_headers($prob,$partid,$respid,
+                                               $resptype,
+                                               $problem_analysis{$prob->src},
+                                               'excel','normal',
+                                               @extra_resp_headers);
+
+                    if (! defined($results)) {
+                        $results = [];
+                    }
+                    #
+                    $rows_output = $student_row;
+                    #
+                    my $response_start_col = $start_col{$prob->symb}->{$partid}->{$respid};
+                    for (my $j=scalar(@$results)-1;$j>=0;$j--) {
+                        $cols_output = $response_start_col;
+                        if ($env{'form.all_sub'} ne 'true') {
+                            next if ($j ne scalar(@$results)-1);
+                        }
+                        my $response = &hashify_response($results->[$j],
+                                                         $prob,
+                                                         $student,
+                                                         $partid,
+                                                         $respid);
+                        my @response_data = 
+                            &compile_response_data(\@headers,$response,
+                                                   $prob,$partid,$respid,
+                                                   $resptype,
+                                                   \&excel_format_item);
+                        $worksheet->write_row($rows_output++,$cols_output,
+                                              \@response_data);
+                        $cols_output+=scalar(@response_data);
+                        if ($rows_output > $max_row) {
+                            $max_row = $rows_output;
+                        }
+                    }
                 }
-                $worksheet->write($rows_output,$cols_output++,$row{$col});
             }
-            $rows_output++;
-        } else {
-            for (my $i=0;$i<scalar(@$results);$i++) {
-                my $response = $results->[$i];
-                if ($ENV{'form.last_sub_only'} eq 'true' && 
-                    $i < (scalar(@$results)-1)) {
-                    next;
-                }
-                delete($row{'time'});
-                delete($row{'attempt'});
-                delete($row{'submission'});
-                delete($row{'awarded'});
-                delete($row{'grading'});
-                delete($row{'score'});
-                my %row_format;
-                #
-                # Time is handled differently
-                $row{'time'} = &Apache::lonstathelpers::calc_serial
-                    ($response->[&Apache::loncoursedata::RDs_timestamp()]);
-                $row_format{'time'}=$format->{'date'};
-                #
-                $row{'attempt'}  = $response->[
-                     &Apache::loncoursedata::RDs_tries()];
-                $row{'submission'} = $response->[
-                     &Apache::loncoursedata::RDs_submission()];
-                if ($row{'submission'} =~ m/^=/) {
-                    # This will be interpreted as a formula.  That is bad!
-                    $row{'submission'} = " ".$row{'submission'};
-                }
-                $row{'grading'} = $response->[
-                     &Apache::loncoursedata::RDs_awarddetail()];
-                $row{'awarded'} = $response->[
-                     &Apache::loncoursedata::RDs_awarded()];
-                $row{'score'} = '='.
-                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                        ($rows_output,$awarded_col)
-                    .'*'.
-                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                        ($rows_output,$weight_col);
-                my $cols_output = 0;
-                foreach my $col (@Columns) {
-                    $worksheet->write($rows_output,$cols_output++,$row{$col},
-                                      $row_format{$col});
-                }
-                $rows_output++;
+        }
+        # Fill in the remaining rows with the students data
+        for (my $row = $student_row+1;$row<$max_row;$row++) {
+            my $cols = 0;
+            foreach my $field (@StudentColumns) {
+                $worksheet->write($row,$cols++,
+                                  $student->{$field});
             }
-        } # End of else clause on if (! defined($results) ....
+        }
+        &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
+                                                 'last student');
     }
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
     #
     # Close the excel file
     $workbook->close();
@@ -567,176 +815,250 @@ sub html_option {
               '";</script>');
     $r->rflush();
     return;
-    
 }
 
-=cut
+sub compile_response_data {
+    my ($headers,$response,$prob,$partid,$respid,$resptype,$format) = @_;
+    if (! ref($headers) || ref($headers) ne 'ARRAY' || ! scalar(@$headers)) {
+        return ();
+    }
+    if (ref($format) ne 'CODE') {
+        $format = sub { return $_[0]; };
+    }
+    #
+    my $submission = 
+        &HTML::Entities::decode
+        (&Apache::lonnet::unescape($response->{'Submission'}));
+    if (!$prob->is_task()) {
+	return () if (! defined($submission) || $submission eq '');
+    }
+    $submission =~ s/\\\"/\"/g;
+    $submission =~ s/\\\'/\'/g;
+    if ($resptype eq 'radiobutton') {
+        $submission =~ s/=([^=])$//;
+    }
+    $response->{'Submission'} = $submission;
+    #
+    my @values;
+    if ($resptype =~ /^(option|match|rank)$/) {
+        my %submission = 
+            map { 
+                my ($foil,$value) = split('=',&Apache::lonnet::unescape($_));
+                ($foil,$value);
+            } split('&',$response->{'Submission'});
+        my %correct;
+        if (exists($response->{'Correct'})) {
+            %correct = 
+                map { 
+                    my ($foil,$value)=split('=',&Apache::lonnet::unescape($_));
+                    ($foil,$value);
+                } split('&',$response->{'Correct'});
+        }
+        #
+        foreach my $original_header (@$headers) {
+            if ($original_header =~ /^_/) {
+                # '_' denotes a foil column
+                my ($header) = ($original_header =~ m/^_(.*)$/);
+                my $option = '';
+                if ( my ($foil) = ($header =~ /(.*) Correct$/)) {
+                    if (exists($correct{$foil})) {
+                        $option = $correct{$foil};
+                    }
+                } elsif (exists($submission{$header})) {
+                    $option = $submission{$header};
+                }
+                push(@values,&{$format}($option,$header));
+            } else {
+                # A normal column
+                push(@values,&{$format}($response->{$original_header},
+                                        $original_header));
+            }
+        }
+    } else {
+        @values = map { &{$format}($response->{$_},$_); } @$headers;
+    }
+    return @values;
+}
+
+sub excel_format_item {
+    my ($item,$type) = @_;
+    if ($type eq 'Time') {
+        $item = &Apache::lonstathelpers::calc_serial($item);
+    } else {
+        if ($item =~ m/^=/) {
+            $item = ' '.$item;
+        }
+        $item =~ s/\\r//g;
+        $item =~ s/\\n/\n/g;
+        $item =~ s/(\s*$|^\s*)//g;
+        $item =~ s/\\\'/\'/g;
+    }
+    return $item;
+}
 
 #########################################################
 #########################################################
 ##
-##      Excel output of student answers and correct answers
+##      CSV output of student answers
 ##
 #########################################################
 #########################################################
-sub prepare_excel_output {
-    my ($r,$problem,$ProblemData,$Students) = @_;
+sub prepare_csv_output {
+    my ($r,$problems,$students) = @_;
     my $c = $r->connection();
-    my ($resource,$respid,$partid) = ($problem->{'resource'},
-                                      $problem->{'respid'},
-                                      $problem->{'part'});
+    #
     $r->print('<h2>'.
-              &mt('Preparing Excel spreadsheet of student responses').
-              '</h2>'.
-              '<p>'.
-              &mt('See the status bar above for student answer computation progress').
-              '</p>');
-    #
-    if ($ENV{'form.correctans'} eq 'true') {
-        &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$Students,
-                                                   'Statistics',
-                                                   'stats_status');
-    }
+              &mt('Generating CSV report of student responses').'</h2>');
     #
-    $r->print('<script>'.
-              'window.document.Statistics.stats_status.value="'.
-              'Done computing student answers.  Compiling spreadsheet.'.
-              '";</script>');
+    # Progress window
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,'CSV File Compilation Status',
+         'CSV File Compilation Progress', 
+         scalar(@$students),'inline',undef,'Statistics','stats_status');
+    
     $r->rflush();
-    my @Columns;
-    push(@Columns,'username');
-    push(@Columns,'domain');
-    push(@Columns,'attempt');
-    push(@Columns,'time');
-    push(@Columns,'submission');
-    if ($ENV{'form.correctans'} eq 'true') { push(@Columns,'correct'); }
-    push(@Columns,'grading');
-    push(@Columns,'awarded');
-    my $awarded_col = $#Columns;
-    push(@Columns,'weight');
-    my $weight_col  = $#Columns;
-    push(@Columns,'score');
     #
-    # Create excel worksheet
+    # Open a file
+    my $outputfile;
     my $filename = '/prtspool/'.
-        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
-        time.'_'.rand(1000000000).'.xls';
-    my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
-    if (! defined($workbook)) {
-        $r->log_error("Error creating excel spreadsheet $filename: $!");
-        $r->print('<p>'.&mt("Unable to create new Excel file.  ".
-                            "This error has been logged.  ".
-                            "Please alert your LON-CAPA administrator").
-                  '</p>');
-        return undef;
+        $env{'user.name'}.'_'.$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.");
+        $outputfile = undef;
+    }
+    #
+    # Compute the number of columns per response
+    my @extra_resp_headers = &get_extra_response_headers();
+    #
+    # Create the table header
+    my @student_columns = ('username','domain','id','section');
+    #
+    my %headers;
+    push(@{$headers{'student'}},@student_columns);
+    # Pad for the student data
+    foreach my $row ('problem','part','response') {
+        $headers{$row}=[map {''} @student_columns];
+    }
+    #
+    # we put the headers into the %headers hash
+    my %problem_analysis;
+    my %start_col;
+    my $max_column = scalar(@student_columns);
+    foreach my $prob (@$problems) {
+        my %analysis = &Apache::lonstathelpers::get_problem_data($prob->src);
+        $problem_analysis{$prob->src}=\%analysis;
+        $headers{'problem'}->[$max_column] = $prob->compTitle;
+        foreach my $partid (@{$prob->parts}) {
+            $headers{'part'}->[$max_column] = $prob->part_display($partid);
+            my $responses = [$prob->responseIds($partid)];
+            my $resptypes = [$prob->responseType($partid)];
+            for (my $i=0;$i<scalar(@$responses);$i++) {
+                my @headers = &get_headers($prob,$partid,$responses->[$i],
+                                           $resptypes->[$i],
+                                           $problem_analysis{$prob->src},
+                                           'csv','display',
+                                           @extra_resp_headers);
+                $start_col{$prob->symb}->{$partid}->{$responses->[$i]}=
+                    $max_column;
+                $headers{'response'}->[$max_column]=
+                    &mt('Response [_1]',$responses->[$i]);
+                for (my $j=0;$j<=$#headers;$j++) {
+                    $headers{'student'}->[$max_column+$j]=$headers[$j];
+                }
+                $max_column += scalar(@headers);
+            }
+        }
+    }
+    foreach my $row ('problem','part','response','student') {
+        print $outputfile '"'.
+            join('","',
+                 map { 
+                     &Apache::loncommon::csv_translate($_); 
+                 } @{$headers{$row}}).'"'.$/;
     }
     #
-    $workbook->set_tempdir('/home/httpd/perl/tmp');
-    #
-    my $format = &Apache::loncommon::define_excel_formats($workbook);
-    my $worksheet  = $workbook->addworksheet('Student Submission Data');
-    #
-    # Make sure we get new weight data instead of data on a 10 minute delay
-    &Apache::lonnet::clear_EXT_cache_status();
-    #
-    # Put on the standard headers and whatnot
-    my $rows_output=0;
-    $worksheet->write($rows_output++,0,$resource->{'title'},$format->{'h1'});
-    $worksheet->write($rows_output++,0,$resource->{'src'},$format->{'h3'});
-    $rows_output++;
-    $worksheet->write_row($rows_output++,0,\@Columns,$format->{'bold'});
-    #
-    # Populate the worksheet with the student data
-    foreach my $student (@$Students) {
+    # Main loop
+    foreach my $student (@$students) {
         last if ($c->aborted());
-        my $results = &Apache::loncoursedata::get_response_data_by_student
-            ($student,$resource->{'symb'},$respid);
-        my %row;
-        $row{'username'} = $student->{'username'};
-        $row{'domain'}   = $student->{'domain'};
-        $row{'correct'}  = $student->{'answer'};
-        $row{'weight'} = &Apache::lonnet::EXT
-            ('resource.'.$partid.'.weight',$resource->{'symb'},
-             undef,undef,undef);
-        if (! defined($results) || ref($results) ne 'ARRAY') {
-            $row{'score'} = '='.
-                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                    ($rows_output,$awarded_col)
-                .'*'.
-                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                    ($rows_output,$weight_col);
-            my $cols_output = 0;
-            foreach my $col (@Columns) {
-                if (! exists($row{$col})) {
-                    $cols_output++;
-                    next;
+        my @rows;
+        foreach my $prob (@$problems) {
+            foreach my $partid (@{$prob->parts}) {
+                my @responses = $prob->responseIds($partid);
+                my @response_type = $prob->responseType($partid);
+                for (my $i=0;$i<=$#responses;$i++) {
+                    my $respid   = $responses[$i];
+                    my $resptype = $response_type[$i];
+                    my @headers = &get_headers($prob,$partid,$respid,$resptype,
+                                               $problem_analysis{$prob->src},
+                                               'csv','normal',
+                                               @extra_resp_headers);
+                    my $results = 
+                        &Apache::loncoursedata::get_response_data_by_student
+                        ($student,$prob->symb(),$respid);
+                    if (! defined($results)) {
+                        $results = [];
+                    }
+                    for (my $j=0; $j<scalar(@$results);$j++) {
+                        if ($env{'form.all_sub'} ne 'true') {
+                            next if ($j != 0);
+                        }
+                        my $idx = scalar(@$results) - $j - 1;
+                        my $response = &hashify_response($results->[$idx],
+                                                         $prob,$student,
+                                                         $partid,$respid);
+                        my @data = &compile_response_data(\@headers,$response,
+                                                          $prob,$partid,
+                                                          $respid,$resptype,
+                                                          \&csv_format_item);
+                        my $resp_start_idx =
+                            $start_col{$prob->symb}->{$partid}->{$respid};
+                        for (my $k=0;$k<=$#data;$k++) {
+                            $rows[$j]->[$resp_start_idx + $k] = $data[$k];
+                        }
+                    }
                 }
-                $worksheet->write($rows_output,$cols_output++,$row{$col});
             }
-            $rows_output++;
-        } else {
-            for (my $i=0;$i<scalar(@$results);$i++) {
-                my $response = $results->[$i];
-                if ($ENV{'form.last_sub_only'} eq 'true' && 
-                    $i < (scalar(@$results)-1)) {
-                    next;
-                }
-                delete($row{'time'});
-                delete($row{'attempt'});
-                delete($row{'submission'});
-                delete($row{'awarded'});
-                delete($row{'grading'});
-                delete($row{'score'});
-                my %row_format;
-                #
-                # Time is handled differently
-                $row{'time'} = &Apache::lonstathelpers::calc_serial
-                    ($response->[&Apache::loncoursedata::RDs_timestamp()]);
-                $row_format{'time'}=$format->{'date'};
-                #
-                $row{'attempt'}  = $response->[
-                     &Apache::loncoursedata::RDs_tries()];
-                $row{'submission'} = $response->[
-                     &Apache::loncoursedata::RDs_submission()];
-                if ($row{'submission'} =~ m/^=/) {
-                    # This will be interpreted as a formula.  That is bad!
-                    $row{'submission'} = " ".$row{'submission'};
-                }
-                $row{'grading'} = $response->[
-                     &Apache::loncoursedata::RDs_awarddetail()];
-                $row{'awarded'} = $response->[
-                     &Apache::loncoursedata::RDs_awarded()];
-                $row{'score'} = '='.
-                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                        ($rows_output,$awarded_col)
-                    .'*'.
-                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
-                        ($rows_output,$weight_col);
-                my $cols_output = 0;
-                foreach my $col (@Columns) {
-                    $worksheet->write($rows_output,$cols_output++,$row{$col},
-                                      $row_format{$col});
-                }
-                $rows_output++;
+        }
+        foreach my $row (@rows) {
+            print $outputfile '"'.join('","',
+                                       map { $student->{$_}; }
+                                       @student_columns).'"';
+            for (my $i=scalar(@student_columns);$i<$max_column;$i++) {
+                my $value = &Apache::loncommon::csv_translate($row->[$i]);
+                $value ||='';
+                print $outputfile ',"'.$value.'"';
             }
-        } # End of else clause on if (! defined($results) ....
-    }
-    #
-    # Close the excel file
-    $workbook->close();
-    #
-    # Write a link to allow them to download it
-    $r->print('<p><a href="'.$filename.'">'.
-              &mt('Your Excel spreadsheet.').
-              '</a></p>'."\n");
-    $r->print('<script>'.
-              'window.document.Statistics.stats_status.value="'.
-              'Done compiling spreadsheet.  See link below to download.'.
-              '";</script>');
+            print $outputfile $/;
+        }
+        undef(@rows);
+        &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
+                                                 'last student');
+    }
+    close($outputfile);
+    #
+    # Close the progress window
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+    #
+    # Tell the user where to get their csv file
+    $r->print('<br />'.
+              '<a href="'.$filename.'">'.&mt('Your csv file.').'</a>'."\n");
     $r->rflush();
     return;
 }
 
+sub csv_format_item {
+    my ($item,$type) = @_;
+    if ($type eq 'Time') {
+        $item = localtime($item);
+    }
+    $item =&Apache::loncommon::csv_translate($item); 
+    return $item;
+}
+
 #########################################################
 #########################################################
 ##
@@ -746,70 +1068,88 @@ sub prepare_excel_output {
 #########################################################
 sub CreateInterface {
     ##
+    ## Output Selection
+    my $output_selector = $/.'<select name="output">'.$/;
+    foreach ('HTML','Excel','CSV') {
+        $output_selector .= '    <option value="'.lc($_).'"';
+        if ($env{'form.output'} eq lc($_)) {
+            $output_selector .= ' selected ';
+        }
+        $output_selector .='>'.&mt($_).'</option>'.$/;
+    } 
+    $output_selector .= '</select>'.$/;
+    ##
     ## Environment variable initialization
     my $Str = '';
-    $Str .= &Apache::lonhtmlcommon::breadcrumbs
-        (undef,'Student Submission Reports');
+    $Str .= &Apache::lonhtmlcommon::breadcrumbs('Student Submission Reports');
     $Str .= '<p>';
     $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>&nbsp;</td>';
+    $Str .= '<th>'.&mt('Sections').'</th>';
+    $Str .= '<th>'.&mt('Groups').'</th>';
+    $Str .= '<th>'.&mt('Enrollment Status').'</th>';
+    $Str .= '<th>'.&mt('Output as [_1]',$output_selector).'</th>';
     $Str .= '</tr>'."\n";
     #
     $Str .= '<tr><td align="center">'."\n";
     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
     $Str .= '</td>';
     #
+    $Str .= '<td align="center">'."\n";
+    $Str .= &Apache::lonstatistics::GroupSelect('Group','multiple',5);
+    $Str .= '</td>';
+    #
     $Str .= '<td align="center">';
     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
     $Str .= '</td>';
     #
     # Render problem checkbox
     my $prob_checkbox = '<input type="checkbox" name="renderprob" ';
-    if (exists($ENV{'form.renderprob'}) && $ENV{'form.renderprob'} eq 'true') {
+    if (exists($env{'form.renderprob'}) && $env{'form.renderprob'} eq 'true') {
         $prob_checkbox .= 'checked ';
     }
     $prob_checkbox .= 'value="true" />';
     #
     # Compute correct answers checkbox
     my $ans_checkbox = '<input type="checkbox" name="correctans" ';
-    if (exists($ENV{'form.correctans'}) && $ENV{'form.correctans'} eq 'true') {
+    if (exists($env{'form.correctans'}) && $env{'form.correctans'} eq 'true') {
         $ans_checkbox .= 'checked ';
     }
     $ans_checkbox .= 'value="true" />';
     #
-    # Only show last submission checkbox
-    my $last_sub_checkbox = '<input type="checkbox" name="last_sub_only" ';
-    if (exists($ENV{'form.last_sub_only'}) && 
-        $ENV{'form.last_sub_only'} eq 'true') {
-        $last_sub_checkbox .= 'checked ';
-    }
-    $last_sub_checkbox.= 'value="true" />';
-    #
-    # extra submission data checkbox
-    my $subdata_checkbox = '<input type="checkbox" name="subdata" ';
-    if (exists($ENV{'form.subdata'}) && 
-        $ENV{'form.subdata'} eq 'true') {
-        $subdata_checkbox .= 'checked ';
+    # Show all submissions checkbox
+    my $all_sub_checkbox = '<input type="checkbox" name="all_sub" ';
+    if (exists($env{'form.all_sub'}) && 
+        $env{'form.all_sub'} eq 'true') {
+        $all_sub_checkbox .= 'checked ';
+    }
+    $all_sub_checkbox.= 'value="true" />';
+    #
+    # problem status checkbox
+    my $prob_status_checkbox = '<input type="checkbox" name="prob_status" ';
+    if (exists($env{'form.prob_status'}) && 
+        $env{'form.prob_status'} eq 'true') {
+        $prob_status_checkbox .= 'checked ';
     }
-    $subdata_checkbox.= 'value="true" />';
+    $prob_status_checkbox .= 'value="true" />';
     #
-    $Str .= '<td align="right" halign="top">'.'<label><b>'.
-        &mt('show problem [_1]',$prob_checkbox).'</b></label><br />'.
+    $Str .= '<td align="right" valign="top">'.
+        '<label><b>'.
+        &mt('Show problem [_1]',$prob_checkbox).'</b></label><br />'.
         '<label><b>'.
-        &mt('compute correct answers [_1]',$ans_checkbox).'</b></label><br />'.
+        &mt('Show correct answers [_1]',$ans_checkbox).'</b></label><br />'.
+        '<label><b>'.
+        &mt('Show all submissions [_1]',$all_sub_checkbox).
+        '</b></label><br />'.
         '<label><b>'.
-        &mt('final answer only [_1]',$last_sub_checkbox).'</b></label><br />'.
-        '<label><b>'.&mt('show extra submission data [_1]',$subdata_checkbox).
+        &mt('Show problem grading [_1]',$prob_status_checkbox).
         '</b></label><br />'.
         '</td>';
     #
     $Str .= '</tr>'."\n";
     $Str .= '</table>'."\n";
     #
-    $Str .= '<nobr>'.&mt('Status: [_1]',
+    $Str .= '<p><nobr>'.&mt('Status: [_1]',
                          '<input type="text" '.
                          'name="stats_status" size="60" value="" />').
             '</nobr>'.'</p>';