Annotation of loncom/interface/statistics/lonstudentassessment.pm, revision 1.56

1.1       stredwic    1: # The LearningOnline Network with CAPA
                      2: #
1.56    ! matthew     3: # $Id: lonstudentassessment.pm,v 1.55 2003/06/10 19:19:57 matthew Exp $
1.1       stredwic    4: #
                      5: # Copyright Michigan State University Board of Trustees
                      6: #
                      7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      8: # LON-CAPA is free software; you can redistribute it and/or modify
                      9: # it under the terms of the GNU General Public License as published by
                     10: # the Free Software Foundation; either version 2 of the License, or
                     11: # (at your option) any later version.
                     12: #
                     13: # LON-CAPA is distributed in the hope that it will be useful,
                     14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     16: # GNU General Public License for more details.
                     17: #
                     18: # You should have received a copy of the GNU General Public License
                     19: # along with LON-CAPA; if not, write to the Free Software
                     20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     21: #
                     22: # /home/httpd/html/adm/gpl.txt
                     23: #
                     24: # http://www.lon-capa.org/
                     25: #
                     26: # (Navigate problems for statistical reports
1.28      matthew    27: #
                     28: #######################################################
                     29: #######################################################
                     30: 
                     31: =pod
                     32: 
                     33: =head1 NAME
                     34: 
                     35: lonstudentassessment
                     36: 
                     37: =head1 SYNOPSIS
                     38: 
                     39: Presents assessment data about a student or a group of students.
                     40: 
                     41: =head1 Subroutines
                     42: 
                     43: =over 4 
                     44: 
                     45: =cut
                     46: 
                     47: #######################################################
                     48: #######################################################
1.1       stredwic   49: 
1.21      minaeibi   50: package Apache::lonstudentassessment;
1.1       stredwic   51: 
                     52: use strict;
1.28      matthew    53: use Apache::lonstatistics;
1.1       stredwic   54: use Apache::lonhtmlcommon;
                     55: use Apache::loncoursedata;
1.28      matthew    56: use Apache::lonnet; # for logging porpoises
1.31      matthew    57: use Spreadsheet::WriteExcel;
                     58: 
                     59: #######################################################
                     60: #######################################################
                     61: =pod
                     62: 
                     63: =item Package Variables
                     64: 
                     65: =over 4
                     66: 
                     67: =item $Statistics Hash ref to store student data.  Indexed by symb,
                     68:       contains hashes with keys 'score' and 'max'.
                     69: 
                     70: =cut
                     71: 
                     72: #######################################################
                     73: #######################################################
1.1       stredwic   74: 
1.30      matthew    75: my $Statistics;
                     76: 
1.28      matthew    77: #######################################################
                     78: #######################################################
                     79: 
                     80: =pod
                     81: 
1.31      matthew    82: =item $show_links 'yes' or 'no' for linking to student performance data
                     83: 
                     84: =item $output_mode 'html', 'excel', or 'csv' for output mode
                     85: 
1.32      matthew    86: =item $show 'all', 'totals', or 'scores' determines how much data is output
1.31      matthew    87: 
1.54      matthew    88: =item $data  determines what performance data is shown
                     89: 
                     90: =item $datadescription A short description of the output data selected.
                     91: 
                     92: =item $base 'tries' or 'scores' determines the base of the performance shown
                     93: 
1.49      matthew    94: =item $single_student_mode evaluates to true if we are showing only one
                     95: student.
                     96: 
1.31      matthew    97: =cut
                     98: 
                     99: #######################################################
                    100: #######################################################
                    101: my $show_links;
                    102: my $output_mode;
1.54      matthew   103: my $data;
                    104: my $base;
                    105: my $datadescription;
1.49      matthew   106: my $single_student_mode;
1.28      matthew   107: 
1.31      matthew   108: #######################################################
                    109: #######################################################
                    110: # End of package variable declarations
1.28      matthew   111: 
1.31      matthew   112: =pod
1.28      matthew   113: 
1.31      matthew   114: =back
1.28      matthew   115: 
1.31      matthew   116: =cut
1.28      matthew   117: 
1.31      matthew   118: #######################################################
                    119: #######################################################
1.28      matthew   120: 
1.31      matthew   121: =pod
1.28      matthew   122: 
1.31      matthew   123: =item &BuildStudentAssessmentPage()
1.28      matthew   124: 
1.31      matthew   125: Inputs: 
1.4       stredwic  126: 
1.31      matthew   127: =over 4
1.28      matthew   128: 
                    129: =item $r Apache Request
                    130: 
                    131: =item $c Apache Connection 
                    132: 
                    133: =back
                    134: 
                    135: =cut
                    136: 
                    137: #######################################################
                    138: #######################################################
1.1       stredwic  139: sub BuildStudentAssessmentPage {
1.30      matthew   140:     my ($r,$c)=@_;
                    141:     undef($Statistics);
1.49      matthew   142:     $single_student_mode = 1 if ($ENV{'form.SelectedStudent'});
1.30      matthew   143:     #
1.31      matthew   144:     # Print out the HTML headers for the interface
                    145:     #    This also parses the output mode selector
1.54      matthew   146:     #    This step must *always* be done.
1.30      matthew   147:     $r->print(&CreateInterface());
1.31      matthew   148:     $r->print('<input type="hidden" name="notfirstrun" value="true" />');
1.49      matthew   149:     $r->print('<input type="hidden" name="sort" value="'.
                    150:               $ENV{'form.sort'}.'" />');
1.7       stredwic  151:     $r->rflush();
1.49      matthew   152:     if (! exists($ENV{'form.notfirstrun'}) && ! $single_student_mode) {
1.31      matthew   153:         return;
                    154:     }
                    155:     #
                    156:     my $initialize     = \&html_initialize;
                    157:     my $output_student = \&html_outputstudent;
                    158:     my $finish         = \&html_finish;
                    159:     #
                    160:     if ($output_mode eq 'excel') {
                    161:         $initialize     = \&excel_initialize;
                    162:         $output_student = \&excel_outputstudent;
                    163:         $finish         = \&excel_finish;
                    164:     } elsif ($output_mode eq 'csv') {
                    165:         $initialize     = \&csv_initialize;
                    166:         $output_student = \&csv_outputstudent;
                    167:         $finish         = \&csv_finish;
                    168:     }
1.30      matthew   169:     #
                    170:     if($c->aborted()) {  return ; }
1.31      matthew   171:     #
1.49      matthew   172:     # Determine which students we want to look at
                    173:     my @Students;
                    174:     if ($single_student_mode) {
                    175:         @Students = (&Apache::lonstatistics::current_student());
                    176:         $r->print(&next_and_previous_buttons());
                    177:         $r->rflush();
                    178:     } else {
                    179:         @Students = @Apache::lonstatistics::Students;
                    180:     }
1.56    ! matthew   181:     #
        !           182:     # Perform generic initialization tasks
        !           183:     #       Since we use lonnet::EXT to retrieve problem weights,
        !           184:     #       to ensure current data we must clear the caches out.
        !           185:     #       This makes sure that parameter changes at the student level
        !           186:     #       are immediately reflected in the chart.
        !           187:     &Apache::lonnet::clear_EXT_cache_status();
1.49      matthew   188:     #
1.31      matthew   189:     # Call the initialize routine selected above
                    190:     $initialize->($r);
1.49      matthew   191:     foreach my $student (@Students) {
1.31      matthew   192:         if($c->aborted()) { 
                    193:             $finish->($r);
                    194:             return ; 
1.1       stredwic  195:         }
1.31      matthew   196:         # Call the output_student routine selected above
                    197:         $output_student->($r,$student);
                    198:     }
                    199:     # Call the "finish" routine selected above
                    200:     $finish->($r);
                    201:     #
                    202:     return;
                    203: }
                    204: 
                    205: #######################################################
                    206: #######################################################
1.49      matthew   207: sub next_and_previous_buttons {
                    208:     my $Str = '';
                    209:     $Str .= '<input type="hidden" name="SelectedStudent" value="'.
                    210:         $ENV{'form.SelectedStudent'}.'" />';
                    211:     #
                    212:     # Build the previous student link
                    213:     my $previous = &Apache::lonstatistics::previous_student();
                    214:     my $previousbutton = '';
                    215:     if (defined($previous)) {
                    216:         my $sname = $previous->{'username'}.':'.$previous->{'domain'};
                    217:         $previousbutton .= '<input type="button" value="'.
                    218:             'Previous Student ('.
                    219:             $previous->{'username'}.'@'.$previous->{'domain'}.')'.
                    220:             '" onclick="document.Statistics.SelectedStudent.value='.
                    221:             "'".$sname."'".';'.
                    222:             'document.Statistics.submit();" />';
                    223:     } else {
                    224:         $previousbutton .= '<input type="button" value="'.
                    225:             'Previous student (none)'.'" />';
                    226:     }
                    227:     #
                    228:     # Build the next student link
                    229:     my $next = &Apache::lonstatistics::next_student();
                    230:     my $nextbutton = '';
                    231:     if (defined($next)) {
                    232:         my $sname = $next->{'username'}.':'.$next->{'domain'};
                    233:         $nextbutton .= '<input type="button" value="'.
                    234:             'Next Student ('.
                    235:             $next->{'username'}.'@'.$next->{'domain'}.')'.
                    236:             '" onclick="document.Statistics.SelectedStudent.value='.
                    237:             "'".$sname."'".';'.
                    238:             'document.Statistics.submit();" />';
                    239:     } else {
                    240:         $nextbutton .= '<input type="button" value="'.
                    241:             'Next student (none)'.'" />';
                    242:     }
                    243:     #
                    244:     # Build the 'all students' button
                    245:     my $all = '';
                    246:     $all .= '<input type="button" value="All Students" '.
                    247:             '" onclick="document.Statistics.SelectedStudent.value='.
                    248:             "''".';'.'document.Statistics.submit();" />';
                    249:     $Str .= $previousbutton.('&nbsp;'x5).$all.('&nbsp;'x5).$nextbutton;
                    250:     return $Str;
                    251: }
                    252: 
                    253: #######################################################
                    254: #######################################################
1.30      matthew   255: 
1.31      matthew   256: sub get_student_fields_to_show {
                    257:     my @to_show = @Apache::lonstatistics::SelectedStudentData;
                    258:     foreach (@to_show) {
                    259:         if ($_ eq 'all') {
                    260:             @to_show = @Apache::lonstatistics::StudentDataOrder;
                    261:             last;
                    262:         }
                    263:     }
                    264:     return @to_show;
                    265: }
                    266: 
1.28      matthew   267: #######################################################
                    268: #######################################################
                    269: 
                    270: =pod
1.2       stredwic  271: 
1.28      matthew   272: =item &CreateInterface()
1.21      minaeibi  273: 
1.28      matthew   274: Called by &BuildStudentAssessmentPage to create the top part of the
                    275: page which displays the chart.
                    276: 
1.30      matthew   277: Inputs: None
1.28      matthew   278: 
                    279: Returns:  A string containing the HTML for the headers and top table for 
                    280: the chart page.
                    281: 
                    282: =cut
                    283: 
                    284: #######################################################
                    285: #######################################################
1.2       stredwic  286: sub CreateInterface {
1.4       stredwic  287:     my $Str = '';
1.30      matthew   288: #    $Str .= &CreateLegend();
                    289:     $Str .= '<table cellspacing="5">'."\n";
                    290:     $Str .= '<tr>';
                    291:     $Str .= '<td align="center"><b>Sections</b></td>';
                    292:     $Str .= '<td align="center"><b>Student Data</b></td>';
1.46      matthew   293:     $Str .= '<td align="center"><b>Enrollment Status</b></td>';
1.41      matthew   294:     $Str .= '<td align="center"><b>Sequences and Folders</b></td>';
1.31      matthew   295:     $Str .= '<td align="center"><b>Output Format</b></td>';
1.54      matthew   296:     $Str .= '<td align="center"><b>Output Data</b></td>';
1.30      matthew   297:     $Str .= '</tr>'."\n";
                    298:     #
1.4       stredwic  299:     $Str .= '<tr><td align="center">'."\n";
1.29      matthew   300:     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
1.4       stredwic  301:     $Str .= '</td><td align="center">';
1.30      matthew   302:     my $only_seq_with_assessments = sub { 
                    303:         my $s=shift;
                    304:         if ($s->{'num_assess'} < 1) { 
                    305:             return 0;
                    306:         } else { 
                    307:             return 1;
                    308:         }
                    309:     };
                    310:     $Str .= &Apache::lonstatistics::StudentDataSelect('StudentData','multiple',
                    311:                                                       5,undef);
1.46      matthew   312:     $Str .= '</td><td>'."\n";
                    313:     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
1.4       stredwic  314:     $Str .= '</td><td>'."\n";
1.30      matthew   315:     $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
                    316:                                               $only_seq_with_assessments);
1.31      matthew   317:     $Str .= '</td><td>'."\n";
                    318:     $Str .= &CreateAndParseOutputSelector();
1.54      matthew   319:     $Str .= '</td><td>'."\n";
                    320:     $Str .= &CreateAndParseOutputDataSelector();
1.30      matthew   321:     $Str .= '</td></tr>'."\n";
                    322:     $Str .= '</table>'."\n";
1.55      matthew   323:     $Str .= '<input type="submit" value="Generate Chart" />';
                    324:     $Str .= '&nbsp;'x8;
1.4       stredwic  325:     return $Str;
1.1       stredwic  326: }
1.30      matthew   327: 
                    328: #######################################################
                    329: #######################################################
                    330: 
                    331: =pod
                    332: 
1.31      matthew   333: =item &CreateAndParseOutputSelector()
1.30      matthew   334: 
                    335: =cut
                    336: 
                    337: #######################################################
                    338: #######################################################
1.32      matthew   339: my @OutputOptions = 
                    340:     ({ name  => 'HTML, with links',
                    341:        value => 'html, with links',
1.33      matthew   342:        description => 'Output HTML with each symbol linked to the problem '.
1.35      matthew   343: 	   'which generated it.',
                    344:        mode => 'html',
                    345:        show_links => 'yes',
                    346:        },
1.47      matthew   347:      { name  => 'HTML, with all links',
                    348:        value => 'html, with all links',
                    349:        description => 'Output HTML with each symbol linked to the problem '.
                    350: 	   'which generated it.  '.
                    351:            'This includes links for unattempted problems.',
                    352:        mode => 'html',
                    353:        show_links => 'all',
                    354:        },
1.32      matthew   355:      { name  => 'HTML, without links',
                    356:        value => 'html, without links',
1.33      matthew   357:        description => 'Output HTML.  By not including links, the size of the'.
                    358: 	   ' web page is greatly reduced.  If your browser crashes on the '.
1.35      matthew   359: 	   'full display, try this.',
                    360:        mode => 'html',
                    361:        show_links => 'no',
                    362:            },
1.54      matthew   363:      { name  => 'Excel',
                    364:        value => 'excel',
                    365:        description => 'Output an Excel file (compatable with Excel 95).',
1.35      matthew   366:        mode => 'excel',
                    367:        show_links => 'no',
1.54      matthew   368:    },
1.48      matthew   369: #     { name  => 'multi-sheet Excel',
                    370: #       value => 'multi-sheet excel',
                    371: #       description => 'Output an Excel file (compatable with Excel 95), '.
                    372: #	   'with a seperate worksheet for each sequence you have selected '.
                    373: #           'the data for each problem part '.
                    374: #           '(number of tries, status, points awarded) will be listed.',
                    375: #       mode => 'multi-sheet excel',
                    376: #       show_links => 'no',
                    377: #           },
                    378: #     { name  => 'multi-sheet Excel, by section',
                    379: #       value => 'multi-sheet excel, by section',
                    380: #       description => 'Output an Excel file (compatable with Excel 95), '.
                    381: #	   'with a seperate worksheet for each sequence you have selected '.
                    382: #           'the data for each problem part '.
                    383: #           '(number of tries, status, points awarded) will be listed.  '.
                    384: #           'There will be one Excel workbook for each section selected.',
                    385: #       mode => 'multi-sheet excel',
                    386: #       show_links => 'no',
                    387: #           },
1.54      matthew   388:      { name  => 'CSV',
                    389:        value => 'csv',
                    390:        description => 'Output a comma seperated values file suitable for '.
                    391:            'import into a spreadsheet.',
1.35      matthew   392:        mode => 'csv',
                    393:        show_links => 'no',
                    394:            },
1.32      matthew   395:      );
                    396: 
1.33      matthew   397: sub OutputDescriptions {
                    398:     my $Str = '';
                    399:     $Str .= "<h2>Output Modes</h2>\n";
                    400:     $Str .= "<dl>\n";
                    401:     foreach my $outputmode (@OutputOptions) {
                    402: 	$Str .="    <dt>".$outputmode->{'name'}."</dt>\n";
                    403: 	$Str .="        <dd>".$outputmode->{'description'}."</dd>\n";
                    404:     }
                    405:     $Str .= "</dl>\n";
                    406:     return $Str;
                    407: }
                    408: 
1.31      matthew   409: sub CreateAndParseOutputSelector {
                    410:     my $Str = '';
1.44      matthew   411:     my $elementname = 'chartoutputmode';
1.31      matthew   412:     #
                    413:     # Format for output options is 'mode, restrictions';
1.50      matthew   414:     my $selected = 'html, without links';
1.31      matthew   415:     if (exists($ENV{'form.'.$elementname})) {
                    416:         if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
                    417:             $selected = $ENV{'form.'.$elementname}->[0];
                    418:         } else {
                    419:             $selected = $ENV{'form.'.$elementname};
                    420:         }
                    421:     }
                    422:     #
                    423:     # Set package variables describing output mode
                    424:     $show_links  = 'no';
                    425:     $output_mode = 'html';
1.35      matthew   426:     foreach my $option (@OutputOptions) {
                    427:         next if ($option->{'value'} ne $selected);
                    428:         $output_mode = $option->{'mode'};
                    429:         $show_links  = $option->{'show_links'};
1.31      matthew   430:     }
1.35      matthew   431: 
1.31      matthew   432:     #
                    433:     # Build the form element
                    434:     $Str = qq/<select size="5" name="$elementname">/;
1.32      matthew   435:     foreach my $option (@OutputOptions) {
                    436:         $Str .= "\n".'    <option value="'.$option->{'value'}.'"';
                    437:         $Str .= " selected " if ($option->{'value'} eq $selected);
                    438:         $Str .= ">".$option->{'name'}."<\/option>";
1.31      matthew   439:     }
                    440:     $Str .= "\n</select>";
                    441:     return $Str;
                    442: }
1.30      matthew   443: 
1.54      matthew   444: ##
                    445: ## Data selector stuff
                    446: ##
                    447: my @OutputDataOptions =
                    448:     ( { name  =>'Tries',
                    449:         base  =>'tries',
                    450:         value => 'tries',
                    451:         shortdesc => 'Number of Tries before success on each Problem Part',
                    452:         longdesc =>'The number of tries before success on each problem part.',
                    453:         },
                    454:       { name  =>'Parts Correct',
                    455:         base  =>'tries',
                    456:         value => 'parts correct',
                    457:         shortdesc => 'Number of Problem Parts completed successfully.',
                    458:         longdesc => 'The Number of Problem Parts completed successfully.',
                    459:         },
                    460:       { name  =>'Parts Correct & Maximums',
                    461:         base  =>'tries',
                    462:         value => 'parts correct total',
                    463:         shortdesc => 'Number of Problem Parts completed successfully.',
                    464:         longdesc => 'The Number of Problem Parts completed successfully and '.
                    465:             'the maximum possible for each student',
                    466:         },
                    467:       { name  => 'Scores',
                    468:         base  => 'scores',
                    469:         value => 'scores',
                    470:         shortdesc => 'Score on each Problem Part',
                    471:         longdesc =>'The students score on each problem part, computed as'.
                    472:             'the part weight * part awarded',
                    473:         },
                    474:       { name  => 'Scores Sum',
                    475:         base  => 'scores',
                    476:         value => 'sum only',
                    477:         shortdesc => 'Sum of Scores on each Problem Part',
                    478:         longdesc =>'The total of the scores of the student on each problem'.
                    479:             ' part in the sequences or folders selected.',
                    480:         },
                    481:       { name  => 'Scores Sum & Maximums',
                    482:         base  => 'scores',
                    483:         value => 'sum and total',
                    484:         shortdesc => 'Total Score and Maximum Possible for each '.
                    485:             'Sequence or Folder',
                    486:         longdesc => 'The total of the scores of the student on each problem'.
                    487:             ' and the maximum possible for that student on each Sequence or '.
                    488:             ' Folder.',
                    489:         },
                    490:       { name  => 'Summary Table (Scores)',
                    491:         base  => 'scores',
                    492:         value => 'final table scores',
                    493:         shortdesc => 'Summary of Scores',
                    494:         longdesc  => '',
                    495:         },
                    496:       { name  => 'Summary Table (Parts)',
                    497:         base  => 'tries',
                    498:         value => 'final table parts',
                    499:         shortdesc => 'Summary of Parts Correct',
                    500:         longdesc  => '',
                    501:         }
                    502:       );
                    503: 
                    504: sub CreateAndParseOutputDataSelector {
                    505:     my $Str = '';
                    506:     my $elementname = 'chartoutputdata';
                    507:     #
                    508:     my $selected = 'scores';
                    509:     if (exists($ENV{'form.'.$elementname})) {
                    510:         if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
                    511:             $selected = $ENV{'form.'.$elementname}->[0];
                    512:         } else {
                    513:             $selected = $ENV{'form.'.$elementname};
                    514:         }
                    515:     }
                    516:     #
                    517:     $data = 'scores';
                    518:     foreach my $option (@OutputDataOptions) {
                    519:         if ($option->{'value'} eq $selected) {
                    520:             $data = $option->{'value'};
                    521:             $base = $option->{'base'};
                    522:             $datadescription = $option->{'shortdesc'};
                    523:         }
                    524:     }
                    525:     #
                    526:     # Build the form element
                    527:     $Str = qq/<select size="5" name="$elementname">/;
                    528:     foreach my $option (@OutputDataOptions) {
                    529:         $Str .= "\n".'    <option value="'.$option->{'value'}.'"';
                    530:         $Str .= " selected " if ($option->{'value'} eq $data);
                    531:         $Str .= ">".$option->{'name'}."<\/option>";
                    532:     }
                    533:     $Str .= "\n</select>";
                    534:     return $Str;
                    535: 
                    536: }
                    537: 
1.28      matthew   538: #######################################################
                    539: #######################################################
1.1       stredwic  540: 
1.28      matthew   541: =pod
                    542: 
1.31      matthew   543: =head2 HTML output routines
1.28      matthew   544: 
1.31      matthew   545: =item &html_initialize($r)
1.28      matthew   546: 
1.31      matthew   547: Create labels for the columns of student data to show.
1.28      matthew   548: 
1.31      matthew   549: =item &html_outputstudent($r,$student)
1.28      matthew   550: 
1.31      matthew   551: Return a line of the chart for a student.
1.28      matthew   552: 
1.31      matthew   553: =item &html_finish($r)
1.28      matthew   554: 
                    555: =cut
                    556: 
                    557: #######################################################
                    558: #######################################################
1.31      matthew   559: {
                    560:     my $padding;
                    561:     my $count;
                    562: 
1.39      matthew   563:     my $nodata_count; # The number of students for which there is no data
                    564:     my %prog_state;   # progress state used by loncommon PrgWin routines
                    565: 
1.31      matthew   566: sub html_initialize {
                    567:     my ($r) = @_;
1.30      matthew   568:     #
                    569:     $padding = ' 'x3;
1.35      matthew   570:     $count = 0;
1.39      matthew   571:     $nodata_count = 0;
1.30      matthew   572:     #
1.38      matthew   573:     $r->print("<h3>".$ENV{'course.'.$ENV{'request.course.id'}.'.description'}.
                    574:               "&nbsp;&nbsp;".localtime(time)."</h3>");
1.39      matthew   575: 
1.55      matthew   576:     if ($data !~ /^final table/) {
                    577:         $r->print("<h3>".$datadescription."</h3>");        
                    578:     }
1.39      matthew   579:     #
                    580:     # Set up progress window for 'final table' display only
1.54      matthew   581:     if ($data =~ /^final table/) {
1.39      matthew   582:         my $studentcount = scalar(@Apache::lonstatistics::Students); 
                    583:         %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
                    584:             ($r,'Summary Table Status',
                    585:              'Summary Table Compilation Progress', $studentcount);
                    586:     }
1.31      matthew   587:     my $Str = "<pre>\n";
1.30      matthew   588:     # First, the @StudentData fields need to be listed
1.31      matthew   589:     my @to_show = &get_student_fields_to_show();
1.30      matthew   590:     foreach my $field (@to_show) {
                    591:         my $title=$Apache::lonstatistics::StudentData{$field}->{'title'};
                    592:         my $base =$Apache::lonstatistics::StudentData{$field}->{'base_width'};
                    593:         my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
                    594:         $Str .= $title.' 'x($width-$base).$padding;
                    595:     }
                    596:     # Now the selected sequences need to be listed
1.40      matthew   597:     foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()){
1.31      matthew   598:         my $title = $sequence->{'title'};
                    599:         my $base  = $sequence->{'base_width'};
                    600:         my $width = $sequence->{'width'};
                    601:         $Str .= $title.' 'x($width-$base).$padding;
1.30      matthew   602:     }
1.54      matthew   603:     $Str .= "total</pre>\n";
1.31      matthew   604:     $Str .= "<pre>";
1.39      matthew   605:     #
                    606:     # Check for suppression of output
1.54      matthew   607:     if ($data =~ /^final table/) {
1.39      matthew   608:         $Str = '';
                    609:     }
1.31      matthew   610:     $r->print($Str);
                    611:     $r->rflush();
                    612:     return;
1.30      matthew   613: }
                    614: 
1.31      matthew   615: sub html_outputstudent {
                    616:     my ($r,$student) = @_;
1.2       stredwic  617:     my $Str = '';
1.35      matthew   618:     #
1.55      matthew   619:     if($count++ % 5 == 0 && $count > 0 && $data !~ /^final table/) {
1.35      matthew   620:         $r->print("</pre><pre>");
                    621:     }
1.30      matthew   622:     # First, the @StudentData fields need to be listed
1.31      matthew   623:     my @to_show = &get_student_fields_to_show();
1.30      matthew   624:     foreach my $field (@to_show) {
                    625:         my $title=$student->{$field};
1.31      matthew   626:         my $base = length($title);
1.30      matthew   627:         my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
                    628:         $Str .= $title.' 'x($width-$base).$padding;
                    629:     }
                    630:     # Get ALL the students data
                    631:     my %StudentsData;
                    632:     my @tmp = &Apache::loncoursedata::get_current_state
                    633:         ($student->{'username'},$student->{'domain'},undef,
                    634:          $ENV{'request.course.id'});
                    635:     if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
                    636:         %StudentsData = @tmp;
                    637:     }
                    638:     if (scalar(@tmp) < 1) {
1.39      matthew   639:         $nodata_count++;
1.54      matthew   640:         return if ($data =~ /^final table/);
1.30      matthew   641:         $Str .= '<font color="blue">No Course Data</font>'."\n";
1.31      matthew   642:         $r->print($Str);
                    643:         $r->rflush();
                    644:         return;
1.30      matthew   645:     }
                    646:     #
                    647:     # By sequence build up the data
                    648:     my $studentstats;
1.31      matthew   649:     my $PerformanceStr = '';
1.40      matthew   650:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.54      matthew   651:         my ($performance,$performance_length,$score,$seq_max,$rawdata);
                    652:         if ($base eq 'tries') {
                    653:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                    654:                 &StudentTriesOnSequence($student,\%StudentsData,
                    655:                                         $seq,$show_links);
                    656:         } else {
                    657:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                    658:                 &StudentPerformanceOnSequence($student,\%StudentsData,
                    659:                                               $seq,$show_links);
                    660:         }
                    661:         my $ratio = sprintf("%3d",$score).'/'.sprintf("%3d",$seq_max);
1.31      matthew   662:         #
1.54      matthew   663:         if ($data eq 'sum and total' || $data eq 'parts correct total') {
                    664:             $performance  = $ratio;
                    665:             $performance .= ' 'x($seq->{'width'}-length($ratio));
                    666:         } elsif ($data eq 'sum only' || $data eq 'parts correct') {
                    667:             $performance  = $score;
                    668:             $performance .= ' 'x($seq->{'width'}-length($score));
1.31      matthew   669:         } else {
                    670:             # Pad with extra spaces
1.51      matthew   671:             $performance .= ' 'x($seq->{'width'}-$performance_length-
1.31      matthew   672:                                  length($ratio)
                    673:                                  ).$ratio;
1.30      matthew   674:         }
1.31      matthew   675:         #
                    676:         $Str .= $performance.$padding;
                    677:         #
                    678:         $studentstats->{$seq->{'symb'}}->{'score'}= $score;
                    679:         $studentstats->{$seq->{'symb'}}->{'max'}  = $seq_max;
1.30      matthew   680:     }
                    681:     #
                    682:     # Total it up and store the statistics info.
                    683:     my ($score,$max) = (0,0);
                    684:     while (my ($symb,$seq_stats) = each (%{$studentstats})) {
                    685:         $Statistics->{$symb}->{'score'} += $seq_stats->{'score'};
1.54      matthew   686:         if ($Statistics->{$symb}->{'max'} < $seq_stats->{'max'}) {
                    687:             $Statistics->{$symb}->{'max'} = $seq_stats->{'max'};
                    688:         }
1.30      matthew   689:         $score += $seq_stats->{'score'};
                    690:         $max   += $seq_stats->{'max'};
                    691:     }
1.31      matthew   692:     $Str .= ' '.' 'x(length($max)-length($score)).$score.'/'.$max;
1.30      matthew   693:     $Str .= " \n";
1.39      matthew   694:     #
                    695:     # Check for suppressed output and update the progress window if so...
1.54      matthew   696:     if ($data =~ /^final table/) {
1.39      matthew   697:         $Str = '';
                    698:         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
                    699:                                                  'last student');
                    700:     }
                    701:     #
1.31      matthew   702:     $r->print($Str);
                    703:     #
                    704:     $r->rflush();
                    705:     return;
1.30      matthew   706: }    
1.2       stredwic  707: 
1.31      matthew   708: sub html_finish {
                    709:     my ($r) = @_;
1.39      matthew   710:     #
                    711:     # Check for suppressed output and close the progress window if so
1.54      matthew   712:     if ($data =~ /^final table/) {
1.39      matthew   713:         &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
                    714:     } else {
                    715:         $r->print("</pre>\n"); 
                    716:     }
1.49      matthew   717:     if ($single_student_mode) {
                    718:         $r->print(&SingleStudentTotal());
                    719:     } else {
                    720:         $r->print(&StudentAverageTotal());
                    721:     }
1.31      matthew   722:     $r->rflush();
                    723:     return;
                    724: }
                    725: 
1.39      matthew   726: sub StudentAverageTotal {
                    727:     my $Str = "<h3>Summary Tables</h3>\n";
                    728:     my $num_students = scalar(@Apache::lonstatistics::Students);
                    729:     my $total_ave = 0;
                    730:     my $total_max = 0;
                    731:     $Str .= '<table border=2 cellspacing="1">'."\n";
                    732:     $Str .= "<tr><th>Title</th><th>Average</th><th>Maximum</th></tr>\n";
1.40      matthew   733:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.42      matthew   734:         my $ave;
                    735:         if ($num_students > $nodata_count) {
                    736:             $ave = int(100*($Statistics->{$seq->{'symb'}}->{'score'}/
                    737:                             ($num_students-$nodata_count)))/100;
                    738:         } else {
                    739:             $ave = 0;
                    740:         }
1.39      matthew   741:         $total_ave += $ave;
1.54      matthew   742:         my $max = $Statistics->{$seq->{'symb'}}->{'max'};
1.39      matthew   743:         $total_max += $max;
                    744:         if ($ave == 0) {
                    745:             $ave = "0.00";
                    746:         }
                    747:         $ave .= '&nbsp;';
                    748:         $max .= '&nbsp;&nbsp;&nbsp;';
                    749:         $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
                    750:             '<td align="right">'.$ave.'</td>'.
                    751:                 '<td align="right">'.$max.'</td></tr>'."\n";
                    752:     }
                    753:     $total_ave = int(100*$total_ave)/100; # only two digit
                    754:     $Str .= "</table>\n";
                    755:     $Str .= '<table border=2 cellspacing="1">'."\n";
                    756:     $Str .= '<tr><th>Number of Students</th><th>Average</th>'.
                    757:         "<th>Maximum</th></tr>\n";
                    758:     $Str .= '<tr><td>'.($num_students-$nodata_count).'</td>'.
                    759:         '<td>'.$total_ave.'</td><td>'.$total_max.'</td>';
                    760:     $Str .= "</table>\n";
                    761:     return $Str;
                    762: }
                    763: 
1.49      matthew   764: sub SingleStudentTotal {
                    765:     my $student = &Apache::lonstatistics::current_student();
1.52      matthew   766:     my $Str = "<h3>Summary table for ".$student->{'fullname'}." ".
                    767:         $student->{'username'}.'@'.$student->{'domain'}."</h3>\n";
1.49      matthew   768:     $Str .= '<table border=2 cellspacing="1">'."\n";
                    769:     $Str .= 
                    770:         "<tr><th>Sequence or Folder</th><th>Score</th><th>Maximum</th></tr>\n";
                    771:     my $total = 0;
                    772:     my $total_max = 0;
                    773:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
                    774:         my $value = $Statistics->{$seq->{'symb'}}->{'score'};
                    775:         my $max = $Statistics->{$seq->{'symb'}}->{'max'};
                    776:         $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
                    777:             '<td align="right">'.$value.'</td>'.
                    778:                 '<td align="right">'.$max.'</td></tr>'."\n";
                    779:         $total += $value;
                    780:         $total_max +=$max;
                    781:     }
                    782:     $Str .= '<tr><td><b>Total</b></td>'.
                    783:         '<td align="right">'.$total.'</td>'.
                    784:         '<td align="right">'.$total_max."</td></tr>\n";
                    785:     $Str .= "</table>\n";
                    786:     return $Str;
                    787: }
                    788: 
1.31      matthew   789: }
                    790: 
1.35      matthew   791: #######################################################
                    792: #######################################################
                    793: 
                    794: =pod
                    795: 
                    796: =head2 Multi-Sheet EXCEL subroutines
                    797: 
                    798: =item &multi_sheet_excel_initialize($r)
                    799: 
                    800: =item &multi_sheet_excel_outputstudent($r,$student)
                    801: 
                    802: =item &multi_sheet_excel_finish($r)
                    803: 
                    804: =cut
                    805: 
                    806: #######################################################
                    807: #######################################################
                    808: {
                    809: 
                    810: sub multi_sheet_excel_initialize {
                    811:     my ($r)=@_;
                    812:     $r->print("<h1>Not yet implemented</h1>");
                    813:     # 
                    814:     # Estimate the size of the file.  We would like to have < 5 megs of data.
                    815:     my $max_size = 5000000;
                    816:     my $num_students  = scalar(@Apache::lonstatistics::Students);
                    817:     my $num_sequences = 0;
                    818:     my $num_data_per_part  = 2; # 'status' and 'numtries'
                    819:     my $fields_per_student = scalar(&get_student_fields_to_show());
                    820:     my $bytes_per_field    = 20; # Back of the envelope calculation
1.40      matthew   821:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.35      matthew   822:         $num_sequences++ if ($seq->{'num_assess'} > 0);
                    823:         $fields_per_student += $num_data_per_part * $seq->{'num_assess_parts'};
                    824:     }
                    825:     my $size_estimate = $fields_per_student*$num_students*$bytes_per_field;
                    826:     #
                    827:     # Compute number of workbooks
                    828:     my $num_workbooks = 1;
                    829:     if ($size_estimate > $max_size) { # try to stay under 5 megs
                    830:         $num_workbooks += int($size_estimate / $max_size);
                    831:     }
1.54      matthew   832: #    if ($data eq ) {
                    833: #        if (@Apache::lonstatistics::SelectedSections > 1 && 
                    834: #            $Apache::lonstatistics::SelectedSections[0] ne 'all') {
                    835: #            $num_workbooks = scalar(@Apache::lonstatistics::SelectedSections);
                    836: #        } else {
                    837: #            # @Apache::lonstatistics::Sections contains 'all' as well.
                    838: #            $num_workbooks = scalar(@Apache::lonstatistics::Sections) - 1;
                    839: #        }
                    840: #    }
1.35      matthew   841:     
                    842:     $r->print("Maximum allowed size: ".$max_size." bytes<br />");
                    843:     $r->print("Number of students: ".$num_students."<br />");
                    844:     $r->print("Number of fields per student: ".$fields_per_student."<br />");
                    845:     $r->print("Total number of fields: ".($fields_per_student*$num_students).
                    846:               "<br />");
                    847:     $r->print("Bytes per field: ".$bytes_per_field." (estimated)"."<br />");
                    848:     $r->print("Estimated size: ".$size_estimate." bytes<br />");
                    849:     $r->print("Number of workbooks: ".$num_workbooks."<br />");
                    850:     $r->rflush();
                    851:     return;
                    852: }
                    853: 
                    854: sub multi_sheet_excel_outputstudent {
                    855:     my ($r,$student) = @_;
                    856: }
                    857: 
                    858: sub multi_sheet_excel_finish {
                    859:     my ($r) = @_;
                    860: }
                    861: 
                    862: }
1.31      matthew   863: #######################################################
                    864: #######################################################
                    865: 
                    866: =pod
                    867: 
                    868: =head2 EXCEL subroutines
                    869: 
                    870: =item &excel_initialize($r)
                    871: 
                    872: =item &excel_outputstudent($r,$student)
                    873: 
                    874: =item &excel_finish($r)
                    875: 
                    876: =cut
                    877: 
                    878: #######################################################
                    879: #######################################################
                    880: {
                    881: 
                    882: my $excel_sheet;
1.32      matthew   883: my $excel_workbook;
                    884: 
                    885: my $filename;
                    886: my $rows_output;
                    887: my $cols_output;
                    888: 
1.36      matthew   889: my %prog_state; # progress window state
1.54      matthew   890: my $request_aborted;
1.31      matthew   891: 
                    892: sub excel_initialize {
                    893:     my ($r) = @_;
                    894:     #
1.54      matthew   895:     $request_aborted = undef;
                    896:     my $total_columns = scalar(&get_student_fields_to_show());
                    897:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
                    898:         # Add 2 because we need a 'sum' and 'total' column for each
                    899:         $total_columns += $seq->{'num_assess_parts'}+2;
                    900:     }
                    901:     if ($data eq 'tries' && $total_columns > 255) {
                    902:         $r->print(<<END);
                    903: <h2>Unable to Complete Request</h2>
                    904: <p>
                    905: LON-CAPA is unable to produce your Excel spreadsheet because your selections
                    906: will result in more than 255 columns.  Excel allows only 255 columns in a
                    907: spreadsheet.
                    908: </p><p>
                    909: You may consider reducing the number of <b>Sequences or Folders</b> you
                    910: have selected.  
                    911: </p><p>
                    912: LON-CAPA can produce <b>CSV</b> files of this data or Excel files of the
                    913: summary data (<b>Parts Correct</b> or <b>Parts Correct & Totals</b>).
                    914: </p>
                    915: END
                    916:        $request_aborted = 1;
                    917:     }
                    918:     if ($data eq 'scores' && $total_columns > 255) {
                    919:         $r->print(<<END);
                    920: <h2>Unable to Complete Request</h2>
                    921: <p>
                    922: LON-CAPA is unable to produce your Excel spreadsheet because your selections
                    923: will result in more than 255 columns.  Excel allows only 255 columns in a
                    924: spreadsheet.
                    925: </p><p>
                    926: You may consider reducing the number of <b>Sequences or Folders</b> you
                    927: have selected.  
                    928: </p><p>
                    929: LON-CAPA can produce <b>CSV</b> files of this data or Excel files of the
                    930: summary data (<b>Scores Sum</b> or <b>Scores Sum & Totals</b>).
                    931: </p>
                    932: END
                    933:        $request_aborted = 1;
                    934:     }
                    935:     if ($data =~ /^final table/) {
                    936:         $r->print(<<END);
                    937: <h2>Unable to Complete Request</h2>
                    938: <p>
                    939: The <b>Summary Table (Scores)</b> option is not available for non-HTML output.
                    940: </p>
                    941: END
                    942:        $request_aborted = 1;
                    943:     }
                    944:     return if ($request_aborted);
                    945:     #
1.32      matthew   946:     $filename = '/prtspool/'.
1.31      matthew   947:         $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
                    948:             time.'_'.rand(1000000000).'.xls';
1.32      matthew   949:     #
                    950:     $excel_workbook = undef;
                    951:     $excel_sheet = undef;
                    952:     #
                    953:     $rows_output = 0;
                    954:     $cols_output = 0;
                    955:     #
                    956:     # Create sheet
                    957:     $excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
                    958:     #
                    959:     # Check for errors
                    960:     if (! defined($excel_workbook)) {
1.31      matthew   961:         $r->log_error("Error creating excel spreadsheet $filename: $!");
                    962:         $r->print("Problems creating new Excel file.  ".
                    963:                   "This error has been logged.  ".
                    964:                   "Please alert your LON-CAPA administrator");
1.32      matthew   965:         return ;
1.31      matthew   966:     }
                    967:     #
                    968:     # The excel spreadsheet stores temporary data in files, then put them
                    969:     # together.  If needed we should be able to disable this (memory only).
                    970:     # The temporary directory must be specified before calling 'addworksheet'.
                    971:     # File::Temp is used to determine the temporary directory.
1.32      matthew   972:     $excel_workbook->set_tempdir($Apache::lonnet::tmpdir);
                    973:     #
                    974:     # Add a worksheet
1.33      matthew   975:     my $sheetname = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
                    976:     if (length($sheetname) > 31) {
                    977:         $sheetname = substr($sheetname,0,31);
                    978:     }
                    979:     $excel_sheet = $excel_workbook->addworksheet($sheetname);
1.32      matthew   980:     #
1.34      matthew   981:     # Put the course description in the header
                    982:     $excel_sheet->write($rows_output,$cols_output++,
                    983:                    $ENV{'course.'.$ENV{'request.course.id'}.'.description'});
                    984:     $cols_output += 3;
                    985:     #
                    986:     # Put a description of the sections listed
                    987:     my $sectionstring = '';
                    988:     my @Sections = @Apache::lonstatistics::SelectedSections;
                    989:     if (scalar(@Sections) > 1) {
                    990:         if (scalar(@Sections) > 2) {
                    991:             my $last = pop(@Sections);
                    992:             $sectionstring = "Sections ".join(', ',@Sections).', and '.$last;
                    993:         } else {
                    994:             $sectionstring = "Sections ".join(' and ',@Sections);
                    995:         }
                    996:     } else {
                    997:         if ($Sections[0] eq 'all') {
                    998:             $sectionstring = "All sections";
                    999:         } else {
                   1000:             $sectionstring = "Section ".$Sections[0];
                   1001:         }
                   1002:     }
                   1003:     $excel_sheet->write($rows_output,$cols_output++,$sectionstring);
                   1004:     $cols_output += scalar(@Sections);
                   1005:     #
                   1006:     # Put the date in there too
1.54      matthew  1007:     $excel_sheet->write($rows_output++,$cols_output++,
1.34      matthew  1008:                         'Compiled on '.localtime(time));
                   1009:     #
1.54      matthew  1010:     $cols_output = 0;
                   1011:     $excel_sheet->write($rows_output++,$cols_output++,$datadescription);
                   1012:     #
                   1013:     if ($data eq 'tries' || $data eq 'scores') {
                   1014:         $rows_output++;
                   1015:     }
1.34      matthew  1016:     #
1.32      matthew  1017:     # Add the student headers
1.34      matthew  1018:     $cols_output = 0;
1.32      matthew  1019:     foreach my $field (&get_student_fields_to_show()) {
1.34      matthew  1020:         $excel_sheet->write($rows_output,$cols_output++,$field);
1.32      matthew  1021:     }
1.54      matthew  1022:     my $row_offset = 0;
                   1023:     if ($data eq 'tries' || $data eq 'scores') {
                   1024:         $row_offset = -1;
                   1025:     }
1.32      matthew  1026:     #
1.54      matthew  1027:     # Add the remaining column headers
1.40      matthew  1028:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.54      matthew  1029:         $excel_sheet->write($rows_output+$row_offset,
                   1030:                             $cols_output,$seq->{'title'});
                   1031:         if ($data eq 'tries' || $data eq 'scores') {
                   1032:             foreach my $res (@{$seq->{'contents'}}) {
                   1033:                 next if ($res->{'type'} ne 'assessment');
                   1034:                 if (scalar(@{$res->{'parts'}}) > 1) {
                   1035:                     foreach my $part (@{$res->{'parts'}}) {
                   1036:                         $excel_sheet->write($rows_output,
                   1037:                                             $cols_output++,
                   1038:                                             $res->{'title'}.' part '.$part);
                   1039:                     }
                   1040:                 } else {
                   1041:                     $excel_sheet->write($rows_output,
                   1042:                                         $cols_output++,
                   1043:                                         $res->{'title'});
                   1044:                 }
                   1045:             }
                   1046:             $excel_sheet->write($rows_output,$cols_output++,'score');
                   1047:             $excel_sheet->write($rows_output,$cols_output++,'maximum');
                   1048:         } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
1.34      matthew  1049:             $excel_sheet->write($rows_output+1,$cols_output,'score');
                   1050:             $excel_sheet->write($rows_output+1,$cols_output+1,'maximum');
1.32      matthew  1051:             $cols_output += 2;
                   1052:         } else {
                   1053:             $cols_output++;
                   1054:         }
                   1055:     }
                   1056:     #
                   1057:     # Bookkeeping
1.54      matthew  1058:     if ($data eq 'sum and total' || $data eq 'parts correct total') {
1.34      matthew  1059:         $rows_output += 2;
1.32      matthew  1060:     } else {
1.34      matthew  1061:         $rows_output += 1;
1.45      matthew  1062:     }
                   1063:     #
                   1064:     # Output a row for MAX
1.54      matthew  1065:     $cols_output = 0;
                   1066:     foreach my $field (&get_student_fields_to_show()) {
                   1067:         if ($field eq 'username' || $field eq 'fullname' || 
                   1068:             $field eq 'id') {
                   1069:             $excel_sheet->write($rows_output,$cols_output++,'Maximum');
                   1070:         } else {
                   1071:             $excel_sheet->write($rows_output,$cols_output++,'');
                   1072:         }
                   1073:     }
                   1074:     #
                   1075:     # Add the maximums for each sequence or assessment
                   1076:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
                   1077:         my $weight;
                   1078:         my $max = 0;
                   1079:         foreach my $resource (@{$seq->{'contents'}}) {
                   1080:             next if ($resource->{'type'} ne 'assessment');
                   1081:             foreach my $part (@{$resource->{'parts'}}) {
                   1082:                 $weight = 1;
                   1083:                 if ($base eq 'scores') {
                   1084:                     $weight = &Apache::lonnet::EXT
                   1085:                         ('resource.'.$part.'.weight',$resource->{'symb'},
                   1086:                          undef,undef,undef);
                   1087:                     if (!defined($weight) || ($weight eq '')) { 
                   1088:                         $weight=1;
                   1089:                     }
                   1090:                 }
                   1091:                 if ($data eq 'scores') {
                   1092:                     $excel_sheet->write($rows_output,$cols_output++,$weight);
                   1093:                 } elsif ($data eq 'tries') {
                   1094:                     $excel_sheet->write($rows_output,$cols_output++,'');
                   1095:                 }
                   1096:                 $max += $weight;
1.45      matthew  1097:             }
1.54      matthew  1098:         } 
                   1099:         if (! ($data eq 'sum only' || $data eq 'parts correct')) {
                   1100:             $excel_sheet->write($rows_output,$cols_output++,'');
1.45      matthew  1101:         }
1.54      matthew  1102:         $excel_sheet->write($rows_output,$cols_output++,$max);
1.32      matthew  1103:     }
1.54      matthew  1104:     $rows_output++;
1.32      matthew  1105:     #
                   1106:     # Let the user know what we are doing
                   1107:     my $studentcount = scalar(@Apache::lonstatistics::Students); 
                   1108:     $r->print("<h1>Compiling Excel spreadsheet for ".
                   1109:               $studentcount.' student');
                   1110:     $r->print('s') if ($studentcount > 1);
                   1111:     $r->print("</h1>\n");
                   1112:     $r->rflush();
1.31      matthew  1113:     #
1.36      matthew  1114:     # Initialize progress window
                   1115:     %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
                   1116:         ($r,'Excel File Compilation Status',
                   1117:          'Excel File Compilation Progress', $studentcount);
                   1118:     #
1.31      matthew  1119:     return;
                   1120: }
                   1121: 
                   1122: sub excel_outputstudent {
                   1123:     my ($r,$student) = @_;
1.54      matthew  1124:     return if ($request_aborted);
1.32      matthew  1125:     return if (! defined($excel_sheet));
                   1126:     $cols_output=0;
                   1127:     #
                   1128:     # Write out student data
                   1129:     my @to_show = &get_student_fields_to_show();
                   1130:     foreach my $field (@to_show) {
                   1131:         $excel_sheet->write($rows_output,$cols_output++,$student->{$field});
                   1132:     }
                   1133:     #
                   1134:     # Get student assessment data
                   1135:     my %StudentsData;
                   1136:     my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
                   1137:                                                         $student->{'domain'},
                   1138:                                                         undef,
                   1139:                                                    $ENV{'request.course.id'});
                   1140:     if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
                   1141:         %StudentsData = @tmp;
                   1142:     }
                   1143:     #
                   1144:     # Write out sequence scores and totals data
1.40      matthew  1145:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.54      matthew  1146:         my ($performance,$performance_length,$score,$seq_max,$rawdata);
                   1147:         if ($base eq 'tries') {
                   1148:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                   1149:                 &StudentTriesOnSequence($student,\%StudentsData,
                   1150:                                         $seq,'no');
                   1151:         } else {
                   1152:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                   1153:                 &StudentPerformanceOnSequence($student,\%StudentsData,
                   1154:                                               $seq,'no');
                   1155:         }
                   1156:         if ($data eq 'tries' || $data eq 'scores') {
                   1157:             foreach my $value (@$rawdata) {
                   1158:                 $excel_sheet->write($rows_output,$cols_output++,$value);
                   1159:             }
                   1160:             $excel_sheet->write($rows_output,$cols_output++,$score);
                   1161:             $excel_sheet->write($rows_output,$cols_output++,$seq_max);
                   1162:         } elsif ($data eq 'sum and total' || $data eq 'sum only' || 
                   1163:             $data eq 'parts correct' || $data eq 'parts correct total') {
1.32      matthew  1164:             $excel_sheet->write($rows_output,$cols_output++,$score);
                   1165:         }
1.54      matthew  1166:         if ($data eq 'sum and total' || $data eq 'parts correct total') {
1.32      matthew  1167:             $excel_sheet->write($rows_output,$cols_output++,$seq_max);
                   1168:         }
                   1169:     }
                   1170:     #
                   1171:     # Bookkeeping
                   1172:     $rows_output++; 
                   1173:     $cols_output=0;
                   1174:     #
1.36      matthew  1175:     # Update the progress window
                   1176:     &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
1.32      matthew  1177:     return;
1.31      matthew  1178: }
                   1179: 
                   1180: sub excel_finish {
                   1181:     my ($r) = @_;
1.54      matthew  1182:     return if ($request_aborted);
1.32      matthew  1183:     return if (! defined($excel_sheet));
                   1184:     #
                   1185:     # Write the excel file
                   1186:     $excel_workbook->close();
                   1187:     my $c = $r->connection();
                   1188:     #
                   1189:     return if($c->aborted());
                   1190:     #
1.36      matthew  1191:     # Close the progress window
                   1192:     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
                   1193:     #
1.32      matthew  1194:     # Tell the user where to get their excel file
1.36      matthew  1195:     $r->print('<br />'.
1.32      matthew  1196:               '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
                   1197:     $r->rflush();
                   1198:     return;
1.31      matthew  1199: }
                   1200: 
                   1201: }
1.30      matthew  1202: #######################################################
                   1203: #######################################################
                   1204: 
                   1205: =pod
                   1206: 
1.31      matthew  1207: =head2 CSV output routines
                   1208: 
                   1209: =item &csv_initialize($r)
                   1210: 
                   1211: =item &csv_outputstudent($r,$student)
                   1212: 
                   1213: =item &csv_finish($r)
1.30      matthew  1214: 
                   1215: =cut
                   1216: 
                   1217: #######################################################
                   1218: #######################################################
1.31      matthew  1219: {
                   1220: 
1.37      matthew  1221: my $outputfile;
                   1222: my $filename;
1.54      matthew  1223: my $request_aborted;
1.37      matthew  1224: my %prog_state; # progress window state
                   1225: 
1.31      matthew  1226: sub csv_initialize{
                   1227:     my ($r) = @_;
1.37      matthew  1228:     # 
                   1229:     # Clean up
                   1230:     $filename = undef;
                   1231:     $outputfile = undef;
                   1232:     undef(%prog_state);
                   1233:     #
1.54      matthew  1234:     # Deal with unimplemented requests
                   1235:     $request_aborted = undef;
                   1236:     if ($data =~ /final table/) {
                   1237:         $r->print(<<END);
                   1238: <h2>Unable to Complete Request</h2>
                   1239: <p>
                   1240: The <b>Summary Table (Scores)</b> option is not available for non-HTML output.
                   1241: </p>
                   1242: END
                   1243:        $request_aborted = 1;
                   1244:     }
                   1245:     return if ($request_aborted);
                   1246: 
                   1247:     #
1.37      matthew  1248:     # Open a file
                   1249:     $filename = '/prtspool/'.
                   1250:         $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
                   1251:             time.'_'.rand(1000000000).'.csv';
                   1252:     unless ($outputfile = Apache::File->new('>/home/httpd'.$filename)) {
                   1253:         $r->log_error("Couldn't open $filename for output $!");
                   1254:         $r->print("Problems occured in writing the csv file.  ".
                   1255:                   "This error has been logged.  ".
                   1256:                   "Please alert your LON-CAPA administrator.");
                   1257:         $outputfile = undef;
                   1258:     }
1.38      matthew  1259:     #
                   1260:     # Datestamp
                   1261:     my $description = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
                   1262:     print $outputfile '"'.&Apache::loncommon::csv_translate($description).'",'.
                   1263:         '"'.&Apache::loncommon::csv_translate(scalar(localtime(time))).'"'.
                   1264:             "\n";
1.37      matthew  1265:     #
                   1266:     # Print out the headings
                   1267:     my $Str = '';
                   1268:     my $Str2 = undef;
                   1269:     foreach my $field (&get_student_fields_to_show()) {
1.54      matthew  1270:         if ($data eq 'sum only') {
1.37      matthew  1271:             $Str .= '"'.&Apache::loncommon::csv_translate($field).'",';
1.54      matthew  1272:         } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
1.37      matthew  1273:             $Str .= '"",'; # first row empty on the student fields
                   1274:             $Str2 .= '"'.&Apache::loncommon::csv_translate($field).'",';
1.54      matthew  1275:         } elsif ($data eq 'scores' || $data eq 'tries' || 
                   1276:                  $data eq 'parts correct') {
1.53      matthew  1277:             $Str  .= '"",';
                   1278:             $Str2 .= '"'.&Apache::loncommon::csv_translate($field).'",';
1.37      matthew  1279:         }
                   1280:     }
1.40      matthew  1281:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.54      matthew  1282:         if ($data eq 'sum only' || $data eq 'parts correct') {
1.37      matthew  1283:             $Str .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
                   1284:                 '",';
1.54      matthew  1285:         } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
1.37      matthew  1286:             $Str  .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
                   1287:                 '","",';
                   1288:             $Str2 .= '"score","total possible",';
1.54      matthew  1289:         } elsif ($data eq 'scores' || $data eq 'tries') {
1.37      matthew  1290:             $Str  .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
                   1291:                 '",';
1.53      matthew  1292:             $Str .= '"",'x($seq->{'num_assess_parts'}-1+2);
                   1293:             foreach my $res (@{$seq->{'contents'}}) {
1.54      matthew  1294:                 next if ($res->{'type'} ne 'assessment');
1.53      matthew  1295:                 foreach my $part (@{$res->{'parts'}}) {
                   1296:                     $Str2 .= '"'.&Apache::loncommon::csv_translate($res->{'title'}.', Part '.$part).'",';
                   1297:                 }
                   1298:             }
                   1299:             $Str2 .= '"score","total possible",';
1.37      matthew  1300:         }
                   1301:     }
                   1302:     chop($Str);
                   1303:     $Str .= "\n";
                   1304:     print $outputfile $Str;
                   1305:     if (defined($Str2)) {
                   1306:         chop($Str2);
                   1307:         $Str2 .= "\n";
                   1308:         print $outputfile $Str2;
                   1309:     }
                   1310:     #
                   1311:     # Initialize progress window
                   1312:     my $studentcount = scalar(@Apache::lonstatistics::Students);
                   1313:     %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
                   1314:         ($r,'CSV File Compilation Status',
                   1315:          'CSV File Compilation Progress', $studentcount);
1.31      matthew  1316:     return;
                   1317: }
                   1318: 
                   1319: sub csv_outputstudent {
                   1320:     my ($r,$student) = @_;
1.54      matthew  1321:     return if ($request_aborted);
1.37      matthew  1322:     return if (! defined($outputfile));
                   1323:     my $Str = '';
                   1324:     #
                   1325:     # Output student fields
                   1326:     my @to_show = &get_student_fields_to_show();
                   1327:     foreach my $field (@to_show) {
                   1328:         $Str .= '"'.&Apache::loncommon::csv_translate($student->{$field}).'",';
                   1329:     }
                   1330:     #
                   1331:     # Get student assessment data
                   1332:     my %StudentsData;
                   1333:     my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
                   1334:                                                         $student->{'domain'},
                   1335:                                                         undef,
                   1336:                                                    $ENV{'request.course.id'});
                   1337:     if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
                   1338:         %StudentsData = @tmp;
                   1339:     }
                   1340:     #
                   1341:     # Output performance data
1.40      matthew  1342:     foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.54      matthew  1343:         my ($performance,$performance_length,$score,$seq_max,$rawdata);
                   1344:         if ($base eq 'tries') {
                   1345:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                   1346:                 &StudentTriesOnSequence($student,\%StudentsData,
                   1347:                                         $seq,'no');
                   1348:         } else {
                   1349:             ($performance,$performance_length,$score,$seq_max,$rawdata) =
                   1350:                 &StudentPerformanceOnSequence($student,\%StudentsData,
                   1351:                                               $seq,'no');
                   1352:         }
                   1353:         if ($data eq 'sum only' || $data eq 'parts correct') {
1.37      matthew  1354:             $Str .= '"'.$score.'",';
1.54      matthew  1355:         } elsif ($data eq 'sum and total' || $data eq 'parts correct total') {
1.37      matthew  1356:             $Str  .= '"'.$score.'","'.$seq_max.'",';
1.54      matthew  1357:         } elsif ($data eq 'scores' || $data eq 'tries') {
                   1358:             $Str .= '"'.join('","',(@$rawdata,$score,$seq_max)).'",';
1.37      matthew  1359:         }
                   1360:     }
                   1361:     chop($Str);
                   1362:     $Str .= "\n";
                   1363:     print $outputfile $Str;
                   1364:     #
                   1365:     # Update the progress window
                   1366:     &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
                   1367:     return;
1.31      matthew  1368: }
                   1369: 
                   1370: sub csv_finish {
                   1371:     my ($r) = @_;
1.54      matthew  1372:     return if ($request_aborted);
1.37      matthew  1373:     return if (! defined($outputfile));
                   1374:     close($outputfile);
                   1375:     #
                   1376:     my $c = $r->connection();
                   1377:     return if ($c->aborted());
                   1378:     #
                   1379:     # Close the progress window
                   1380:     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
                   1381:     #
                   1382:     # Tell the user where to get their csv file
                   1383:     $r->print('<br />'.
                   1384:               '<a href="'.$filename.'">Your csv file.</a>'."\n");
                   1385:     $r->rflush();
                   1386:     return;
                   1387:     
1.31      matthew  1388: }
1.2       stredwic 1389: 
                   1390: }
                   1391: 
1.28      matthew  1392: #######################################################
                   1393: #######################################################
                   1394: 
1.2       stredwic 1395: =pod
                   1396: 
1.54      matthew  1397: =item &StudentTriesOnSequence()
1.2       stredwic 1398: 
1.30      matthew  1399: Inputs:
1.2       stredwic 1400: 
                   1401: =over 4
                   1402: 
1.30      matthew  1403: =item $student
1.28      matthew  1404: 
1.30      matthew  1405: =item $studentdata Hash ref to all student data
1.2       stredwic 1406: 
1.30      matthew  1407: =item $seq Hash ref, the sequence we are working on
1.2       stredwic 1408: 
1.30      matthew  1409: =item $links if defined we will output links to each resource.
1.2       stredwic 1410: 
1.28      matthew  1411: =back
1.2       stredwic 1412: 
                   1413: =cut
1.1       stredwic 1414: 
1.28      matthew  1415: #######################################################
                   1416: #######################################################
1.54      matthew  1417: sub StudentTriesOnSequence {
1.32      matthew  1418:     my ($student,$studentdata,$seq,$links) = @_;
1.31      matthew  1419:     $links = 'no' if (! defined($links));
1.1       stredwic 1420:     my $Str = '';
1.30      matthew  1421:     my ($sum,$max) = (0,0);
1.51      matthew  1422:     my $performance_length = 0;
1.54      matthew  1423:     my @TriesData = ();
                   1424:     my $tries;
1.30      matthew  1425:     foreach my $resource (@{$seq->{'contents'}}) {
                   1426:         next if ($resource->{'type'} ne 'assessment');
                   1427:         my $resource_data = $studentdata->{$resource->{'symb'}};
                   1428:         my $value = '';
                   1429:         foreach my $partnum (@{$resource->{'parts'}}) {
1.54      matthew  1430:             $tries = undef;
1.30      matthew  1431:             $max++;
1.51      matthew  1432:             $performance_length++;
1.30      matthew  1433:             my $symbol = ' '; # default to space
                   1434:             #
                   1435:             if (exists($resource_data->{'resource.'.$partnum.'.solved'})) {
                   1436:                 my $status = $resource_data->{'resource.'.$partnum.'.solved'};
                   1437:                 if ($status eq 'correct_by_override') {
                   1438:                     $symbol = '+';
                   1439:                     $sum++;
                   1440:                 } elsif ($status eq 'incorrect_by_override') {
                   1441:                     $symbol = '-';
                   1442:                 } elsif ($status eq 'ungraded_attempted') {
                   1443:                     $symbol = '#';
                   1444:                 } elsif ($status eq 'incorrect_attempted')  {
                   1445:                     $symbol = '.';
                   1446:                 } elsif ($status eq 'excused') {
                   1447:                     $symbol = 'x';
                   1448:                     $max--;
                   1449:                 } elsif ($status eq 'correct_by_student' &&
                   1450:                     exists($resource_data->{'resource.'.$partnum.'.tries'})){
1.54      matthew  1451:                     $tries = $resource_data->{'resource.'.$partnum.'.tries'};
                   1452:                     if ($tries > 9) {
1.30      matthew  1453:                         $symbol = '*';
1.54      matthew  1454:                     } elsif ($tries > 0) {
                   1455:                         $symbol = $tries;
1.30      matthew  1456:                     } else {
                   1457:                         $symbol = ' ';
                   1458:                     }
                   1459:                     $sum++;
1.43      matthew  1460:                 } elsif (exists($resource_data->{'resource.'.
                   1461:                                                      $partnum.'.tries'})){
                   1462:                     $symbol = '.';
1.30      matthew  1463:                 } else {
                   1464:                     $symbol = ' ';
1.2       stredwic 1465:                 }
1.30      matthew  1466:             } else {
                   1467:                 # Unsolved.  Did they try?
                   1468:                 if (exists($resource_data->{'resource.'.$partnum.'.tries'})){
                   1469:                     $symbol = '.';
                   1470:                 } else {
                   1471:                     $symbol = ' ';
1.18      matthew  1472:                 }
1.2       stredwic 1473:             }
1.54      matthew  1474:             #
                   1475:             if (! defined($tries)) {
                   1476:                 $tries = $symbol;
                   1477:             }
                   1478:             push (@TriesData,$tries);
1.30      matthew  1479:             #
1.47      matthew  1480:             if ( ($links eq 'yes' && $symbol ne ' ') ||
                   1481:                  ($links eq 'all')) {
1.49      matthew  1482:                 if (length($symbol) > 1) {
                   1483:                     &Apache::lonnet::logthis('length of symbol "'.$symbol.'" > 1');
                   1484:                 }
1.30      matthew  1485:                 $symbol = '<a href="/adm/grades'.
                   1486:                     '?symb='.&Apache::lonnet::escape($resource->{'symb'}).
                   1487:                         '&student='.$student->{'username'}.
                   1488:                             '&domain='.$student->{'domain'}.
                   1489:                                 '&command=submission">'.$symbol.'</a>';
                   1490:             }
                   1491:             $value .= $symbol;
1.2       stredwic 1492:         }
1.30      matthew  1493:         $Str .= $value;
1.17      minaeibi 1494:     }
1.51      matthew  1495:     if ($seq->{'randompick'}) {
                   1496:         $max = $seq->{'randompick'};
                   1497:     }
1.54      matthew  1498:     return ($Str,$performance_length,$sum,$max,\@TriesData);
                   1499: }
                   1500: 
                   1501: #######################################################
                   1502: #######################################################
                   1503: 
                   1504: =pod
                   1505: 
                   1506: =item &StudentPerformanceOnSequence()
                   1507: 
                   1508: Inputs:
                   1509: 
                   1510: =over 4
                   1511: 
                   1512: =item $student
                   1513: 
                   1514: =item $studentdata Hash ref to all student data
                   1515: 
                   1516: =item $seq Hash ref, the sequence we are working on
                   1517: 
                   1518: =item $links if defined we will output links to each resource.
                   1519: 
                   1520: =back
                   1521: 
                   1522: =cut
                   1523: 
                   1524: #######################################################
                   1525: #######################################################
                   1526: sub StudentPerformanceOnSequence {
                   1527:     my ($student,$studentdata,$seq,$links) = @_;
                   1528:     $links = 'no' if (! defined($links));
                   1529:     my $Str = ''; # final result string
                   1530:     my ($score,$max) = (0,0);
                   1531:     my $performance_length = 0;
                   1532:     my $symbol;
                   1533:     my @ScoreData = ();
                   1534:     my $partscore;
                   1535:     foreach my $resource (@{$seq->{'contents'}}) {
                   1536:         next if ($resource->{'type'} ne 'assessment');
                   1537:         my $resource_data = $studentdata->{$resource->{'symb'}};
                   1538:         foreach my $part (@{$resource->{'parts'}}) {
                   1539:             $partscore = undef;
                   1540:             my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
                   1541:                                               $resource->{'symb'},
                   1542:                                               $student->{'domain'},
                   1543:                                               $student->{'username'},
                   1544:                                               $student->{'section'});
                   1545:             if (!defined($weight) || ($weight eq '')) { 
                   1546:                 $weight=1;
                   1547:             }
                   1548:             #
                   1549:             $max += $weight; # see the 'excused' branch below...
                   1550:             $performance_length++; # one character per part
                   1551:             $symbol = ' '; # default to space
                   1552:             #
                   1553:             my $awarded = 0;
                   1554:             if (exists($resource_data->{'resource.'.$part.'.awarded'})) {
                   1555:                 $awarded = $resource_data->{'resource.'.$part.'.awarded'};
                   1556:             }
                   1557:             #
                   1558:             $partscore = $weight*$awarded;
                   1559:             $score += $partscore;
                   1560:             $symbol = $weight; 
                   1561:             if (length($symbol) > 1) {
                   1562:                 $symbol = '*';
                   1563:             }
                   1564:             if (exists($resource_data->{'resource.'.$part.'.solved'})) {
                   1565:                 my $status = $resource_data->{'resource.'.$part.'.solved'};
                   1566:                 if ($status eq 'excused') {
                   1567:                     $symbol = 'x';
                   1568:                     $max -= $weight; # Do not count 'excused' problems.
                   1569:                 }
                   1570:             } else {
                   1571:                 # Unsolved.  Did they try?
                   1572:                 if (exists($resource_data->{'resource.'.$part.'.tries'})){
                   1573:                     $symbol = '.';
                   1574:                 } else {
                   1575:                     $symbol = ' ';
                   1576:                 }
                   1577:             }
                   1578:             #
                   1579:             if ( ($links eq 'yes' && $symbol ne ' ') || ($links eq 'all')) {
                   1580:                 $symbol = '<a href="/adm/grades'.
                   1581:                     '?symb='.&Apache::lonnet::escape($resource->{'symb'}).
                   1582:                     '&student='.$student->{'username'}.
                   1583:                     '&domain='.$student->{'domain'}.
                   1584:                     '&command=submission">'.$symbol.'</a>';
                   1585:             }
                   1586:             if (! defined($partscore)) {
                   1587:                 $partscore = $symbol;
                   1588:             }
                   1589:             push (@ScoreData,$partscore);
                   1590:         }
                   1591:         $Str .= $symbol;
                   1592:     }
                   1593:     return ($Str,$performance_length,$score,$max,\@ScoreData);
1.1       stredwic 1594: }
1.23      minaeibi 1595: 
1.28      matthew  1596: #######################################################
                   1597: #######################################################
1.23      minaeibi 1598: 
1.2       stredwic 1599: =pod
                   1600: 
                   1601: =item &CreateLegend()
                   1602: 
                   1603: This function returns a formatted string containing the legend for the
                   1604: chart.  The legend describes the symbols used to represent grades for
                   1605: problems.
                   1606: 
                   1607: =cut
                   1608: 
1.28      matthew  1609: #######################################################
                   1610: #######################################################
1.2       stredwic 1611: sub CreateLegend {
                   1612:     my $Str = "<p><pre>".
1.13      minaeibi 1613:               "   1  correct by student in 1 try\n".
                   1614:               "   7  correct by student in 7 tries\n".
1.12      minaeibi 1615:               "   *  correct by student in more than 9 tries\n".
1.20      minaeibi 1616: 	      "   +  correct by hand grading or override\n".
1.12      minaeibi 1617:               "   -  incorrect by override\n".
                   1618: 	      "   .  incorrect attempted\n".
                   1619: 	      "   #  ungraded attempted\n".
1.13      minaeibi 1620:               "      not attempted (blank field)\n".
1.12      minaeibi 1621: 	      "   x  excused".
1.17      minaeibi 1622:               "</pre><p>";
1.2       stredwic 1623:     return $Str;
                   1624: }
                   1625: 
1.28      matthew  1626: #######################################################
                   1627: #######################################################
                   1628: 
1.30      matthew  1629: =pod 
1.2       stredwic 1630: 
                   1631: =back
                   1632: 
                   1633: =cut
                   1634: 
1.28      matthew  1635: #######################################################
                   1636: #######################################################
1.2       stredwic 1637: 
1.28      matthew  1638: 1;
1.2       stredwic 1639: 
1.1       stredwic 1640: __END__

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