--- loncom/interface/statistics/lonproblemstatistics.pm	2003/03/25 23:00:40	1.41
+++ loncom/interface/statistics/lonproblemstatistics.pm	2003/03/26 17:03:41	1.44
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemstatistics.pm,v 1.41 2003/03/25 23:00:40 matthew Exp $
+# $Id: lonproblemstatistics.pm,v 1.44 2003/03/26 17:03:41 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,6 +35,7 @@ use Apache::lonnet();
 use Apache::lonhtmlcommon;
 use Apache::loncoursedata;
 use Apache::lonstatistics;
+use Spreadsheet::WriteExcel;
 
 #######################################################
 #######################################################
@@ -229,12 +230,20 @@ sub BuildProblemStatisticsPage {
         } elsif ($show eq 'ungrouped') {
             &output_html_ungrouped($r);
         }
+    } elsif ($output_mode eq 'excel') {
+        $r->print("<h2>Preparing Excel Spreadsheet</h2>");
+        &output_excel($r);
     } else {
         $r->print("<h1>Not implemented</h1>");
     }
     return;
 }
 
+###############################################
+###############################################
+
+###############################################
+###############################################
 sub output_html_grouped_by_sequence {
     my ($r) = @_;
     #$r->print(&ProblemStatisticsLegend());
@@ -243,6 +252,7 @@ sub output_html_grouped_by_sequence {
                   "S.D.","Skew.");#,"D.F.1st","D.F.2nd");
     # #FFFFE6 #EEFFCC #DDFFFF FFDDDD #DDFFDD #FFDDFF
     foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) {
+        my $show_part = 0;
         next if ($sequence->{'num_assess'}<1);
         $r->print("<h3>".$sequence->{'title'}."</h3>");
         $r->print('<table border="0"><tr><td bgcolor="#777777">'."\n");
@@ -252,20 +262,22 @@ sub output_html_grouped_by_sequence {
         foreach my $resource (@{$sequence->{'contents'}}) {
             next if ($resource->{'type'} ne 'assessment');
             foreach my $part (@{$resource->{'parts'}}) {
-                if ($part == 0) {
-                    $part = '&nbsp;';
-                }
                 my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD,
                     $SKEW) = &Apache::loncoursedata::get_problem_statistics
                         (undef,$resource->{'symb'},$part,
                          $ENV{'request.course.id'});
+                #
+                $show_part = 1 if ($part ne '0');
+                $part = '&nbsp;' if ($part == 0);
+                #
                 my $wrongpercent = 0;
                 if (defined($num) && $num > 0) {
                     $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
                 }
                 $r->print('<tr>'.&statistics_html_table_data
                           ($resource,$part,$num,$tries,$mod,$mean,$Solved,
-                           $solved,$wrongpercent,$DegOfDiff,$STD,$SKEW).
+                           $solved,$wrongpercent,$DegOfDiff,$STD,$SKEW,
+                           $show_part).
                           "</tr>\n");
             }
         }
@@ -277,7 +289,6 @@ sub output_html_grouped_by_sequence {
     return;
 }
 
-
 ###############################################
 ###############################################
 
@@ -286,16 +297,22 @@ sub output_html_grouped_by_sequence {
 sub output_html_ungrouped {
     my ($r) = @_;
     #
-    my $sortby = $ENV{'form.sortby'};
-    if (! defined($sortby) || $sortby eq '') {
-        $sortby = 'sequence';
-    }
-    #
     my $show_container = 0;
+    my $show_part = 0;
     #$r->print(&ProblemStatisticsLegend());
     my @Header = ("Title","Part","#Stdnts","Tries","Mod",
                   "Mean","#YES","#yes","%Wrng","DoDiff",
-                  "S.D.","Skew.");#,"D.F.1st","D.F.2nd");
+                  "S.D.","Skew");#,"D.F.1st","D.F.2nd");
+    #
+    my $sortby = undef;
+    foreach (@Header) {
+        if ($ENV{'form.sortby'} eq $_) {
+            $sortby = $_;
+        }
+    }
+    if (! defined($sortby) || $sortby eq '') {
+        $sortby = 'Container';
+    }
     # #FFFFE6 #EEFFCC #DDFFFF FFDDDD #DDFFDD #FFDDFF
     my @Sequences = &Apache::lonstatistics::Sequences_with_Assess();
     if (@Sequences > 1) {
@@ -304,71 +321,261 @@ sub output_html_ungrouped {
     }
     #
     $r->print('<table border="0"><tr><td bgcolor="#777777">'."\n");
+    $r->rflush();
+    #
+    # Compile the data
+    my @Statsarray;
+    foreach my $sequence (@Sequences) {
+        next if ($sequence->{'num_assess'}<1);
+        foreach my $resource (@{$sequence->{'contents'}}) {
+            next if ($resource->{'type'} ne 'assessment');
+            foreach my $part (@{$resource->{'parts'}}) {
+                my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD,
+                    $SKEW) = &Apache::loncoursedata::get_problem_statistics
+                        (undef,$resource->{'symb'},$part,
+                         $ENV{'request.course.id'});
+                #
+                $show_part = 1 if ($part ne '0');
+                $part = '&nbsp;' if ($part == 0);
+                #
+                my $wrongpercent = 0;
+                if (defined($num) && $num > 0) {
+                    $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
+                }
+                push (@Statsarray,
+                      { 'sequence' => $sequence,
+                        'resource' => $resource,
+                        'Title' => $resource->{'title'},
+                        'Part'  => $part,
+                        '#Stdnts' => $num,
+                        'Tries' => $tries,
+                        'Mod' => $mod,
+                        'Mean' => $mean,
+                        '#YES' => $Solved,
+                        '#yes' => $solved,
+                        '%Wrng' => $wrongpercent,
+                        'DoDiff' => $DegOfDiff,
+                        'S.D.' => $STD,
+                        'Skew' => $SKEW,
+                      });
+            }
+        }
+    }
+    #
+    # Table Headers
     $r->print('<table border="0" cellpadding="3">'."\n");
     my $Str = '';
     foreach (@Header) {
-        $Str .= '<th>'.
+        next if ($_ eq 'Part' && !$show_part);
+        # Do not allow sorting on some fields
+        if ($_ eq $sortby || /^(Part)$/) {  
+            $Str .= '<th>'.$_.'</th>';
+        } else {
+            $Str .= '<th>'.
      '<a href="javascript:document.Statistics.sortby.value='."'$_'".
          ';document.Statistics.submit();">'.
-         $_.'</a></th>';
+             $_.'</a></th>';
+        }
     }
     $r->print('<tr bgcolor="#FFFFE6">'.$Str."</tr>\n");
+    #
+    # Sort the data
+    my @OutputOrder;
+    if ($sortby eq 'Container') {
+        @OutputOrder = @Statsarray;
+    } else {
+        # $sortby is already defined, so we can charge ahead
+        if ($sortby =~ /^(title|part)$/i) {
+            # Alpha comparison
+            @OutputOrder = sort {
+                lc($a->{$sortby}) cmp lc($b->{$sortby}) ||
+                    lc($a->{'Title'}) cmp lc($b->{'Title'}) ||
+                        lc($a->{'Part'}) cmp lc($b->{'Part'});
+            } @Statsarray;
+        } else {
+            # Numerical comparison
+            @OutputOrder = sort {
+                my $retvalue = 0;
+                if ($b->{$sortby} eq 'nan') {
+                    if ($a->{$sortby} ne 'nan') {
+                        $retvalue = -1;
+                    } else {
+                        $retvalue = 0;
+                    }
+                }
+                if ($a->{$sortby} eq 'nan') {
+                    if ($b->{$sortby} ne 'nan') {
+                        $retvalue = 1;
+                    }
+                }
+                if ($retvalue eq '0') {
+                    $retvalue = $b->{$sortby} <=> $a->{$sortby} ||
+                                lc($a->{'Title'}) <=> lc($b->{'Title'}) ||
+                                lc($a->{'Part'})  <=> lc($b->{'Part'});
+                }
+                $retvalue;
+            } @Statsarray;
+        }
+    }
+    foreach my $row (@OutputOrder) {
+        $r->print('<tr>');
+        if ($show_container) {
+            $r->print('<td bgcolor="#FFFFE6">'
+                      .$row->{'sequence'}->{'title'}.'</td>');
+        }
+        $r->print(&stats_row_from_hash($row,$show_part));
+        $r->print("</tr>\n");
+    }
+    $r->print("</table>\n");
+    $r->print("</td></tr></table>\n");
     $r->rflush();
     #
-    foreach my $sequence (@Sequences) {
+    return;
+}
+
+sub stats_row_from_hash {
+    my ($data,$show_part) = @_;
+    return &statistics_html_table_data($data->{'resource'},$data->{'Part'},
+                                       $data->{'#Stdnts'}, $data->{'Tries'},
+                                       $data->{'Mod'},     $data->{'Mean'},
+                                       $data->{'#YES'},    $data->{'#yes'},
+                                       $data->{"\%Wrng"},  $data->{'DoDiff'},
+                                       $data->{'S.D.'},    $data->{'Skew'},
+                                       $show_part);
+}
+
+###############################################
+###############################################
+
+###############################################
+###############################################
+sub output_excel {
+    my ($r) = @_;
+    my $filename = '/prtspool/'.
+        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
+            time.'_'.rand(1000000000).'.xls';
+    #
+    my $excel_workbook = undef;
+    my $excel_sheet = undef;
+    #
+    my $rows_output = 0;
+    my $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'};
+    if (length($sheetname) > 31) {
+        $sheetname = substr($sheetname,0,31);
+    }
+    $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));
+    #
+    $rows_output++; 
+    $cols_output=0;
+    #
+    # Add the headers
+    my @Header = ("Container","Title","Part","#Stdnts","Tries","Mod",
+                  "Mean","#YES","#yes","%Wrng","DoDiff",
+                  "S.D.","Skew.");#,"D.F.1st","D.F.2nd");
+    foreach (@Header) {
+        $excel_sheet->write($rows_output,$cols_output++,$_);
+    }
+    $rows_output++;
+    #
+    # Write the data
+    foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) {
         next if ($sequence->{'num_assess'}<1);
         foreach my $resource (@{$sequence->{'contents'}}) {
             next if ($resource->{'type'} ne 'assessment');
             foreach my $part (@{$resource->{'parts'}}) {
+                $cols_output=0;
                 my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD,
                     $SKEW) = &Apache::loncoursedata::get_problem_statistics
                         (undef,$resource->{'symb'},$part,
                          $ENV{'request.course.id'});
-                if ($part == 0) {
-                    $part = '&nbsp;';
+                #
+                if (!defined($part) || $part eq '') {
+                    $part = ' ';
                 }
                 my $wrongpercent = 0;
                 if (defined($num) && $num > 0) {
                     $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
                 }
-                if ($show_container) {
-                    $r->print('<tr>'.
-                              '<td bgcolor="#FFFFE6">'.$sequence->{'title'}.
-                              '</td>'.
-                              &statistics_html_table_data
-                              ($resource,$part,$num,$tries,$mod,$mean,$Solved,
-                               $solved,$wrongpercent,$DegOfDiff,$STD,$SKEW).
-                              "</tr>\n");
-                } else {
-                    $r->print('<tr>'.&statistics_html_table_data
-                              ($resource,$part,$num,$tries,$mod,$mean,$Solved,
-                               $solved,$wrongpercent,$DegOfDiff,$STD,$SKEW).
-                              "</tr>\n");
+                foreach ($sequence->{'title'},$resource->{'title'},$part,
+                         $num,$tries,$mod,$mean,$Solved,$solved,$wrongpercent,
+                         $DegOfDiff,$STD,$SKEW) {
+                    $excel_sheet->write($rows_output,$cols_output++,$_);
                 }
+                $rows_output++;
             }
         }
     }
-    $r->print("</table>\n");
-    $r->print("</td></tr></table>\n");
-    $r->rflush();
     #
+    # Write the excel file
+    $excel_workbook->close();
+    # Tell the user where to get their excel file
+    $r->print('<br />'.
+              '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
+    $r->rflush();
     return;
 }
 
-###############################################
-###############################################
 
-###############################################
-###############################################
+
 sub statistics_html_table_data {
     my ($resource,$part,$num,$tries,$mod,$mean,$Solved,$solved,$wrongpercent,
-        $DegOfDiff,$STD,$SKEW) = @_;
+        $DegOfDiff,$STD,$SKEW,$show_part) = @_;
     my $row = '';
     $row .= '<td bgcolor="#FFFFE6">'.
         '<a href="'.$resource->{'src'}.'" target="_blank" >'.
             $resource->{'title'}.'</a>'.
                 '</td>';
-    $row .= '<td bgcolor="#FFFFE6">'.$part.'</td>' if (defined($part));
+    $row .= '<td bgcolor="#FFFFE6">'.$part.'</td>' if ($show_part);
     foreach ($num,$tries) {
         $row .= '<td bgcolor="#EEFFCC" align="right">'.$_.'</td>';
     }