File:  [LON-CAPA] / loncom / interface / statistics / lonstudentsubmissions.pm
Revision 1.20: download - view: text, annotated - select for diffs
Mon Sep 20 19:24:02 2004 UTC (19 years, 9 months ago) by matthew
Branches: MAIN
CVS tags: HEAD
Excel output only still, but added multiple submission output, problem
grading output.  In case the user has selected too many problems to get
data for (> 255 cols), we now tell them the last one we can fit in the
Excel sheet.  Moved much of the inner most loop of excel sheet writing
to a subroutine, &write_excel_row.

    1: # The LearningOnline Network with CAPA
    2: #
    3: # $Id: lonstudentsubmissions.pm,v 1.20 2004/09/20 19:24:02 matthew Exp $
    4: #
    5: # Copyright Michigan State University Board of Trustees
    6: #
    7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    8: #
    9: # LON-CAPA is free software; you can redistribute it and/or modify
   10: # it under the terms of the GNU General Public License as published by
   11: # the Free Software Foundation; either version 2 of the License, or
   12: # (at your option) any later version.
   13: #
   14: # LON-CAPA is distributed in the hope that it will be useful,
   15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   17: # GNU General Public License for more details.
   18: #
   19: # You should have received a copy of the GNU General Public License
   20: # along with LON-CAPA; if not, write to the Free Software
   21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   22: #
   23: # /home/httpd/html/adm/gpl.txt
   24: #
   25: # http://www.lon-capa.org/
   26: #
   27: package Apache::lonstudentsubmissions;
   28: 
   29: use strict;
   30: use Apache::lonnet();
   31: use Apache::loncommon();
   32: use Apache::lonhtmlcommon();
   33: use Apache::loncoursedata();
   34: use Apache::lonstatistics;
   35: use Apache::lonlocal;
   36: use Apache::lonstathelpers;
   37: use HTML::Entities();
   38: use Time::Local();
   39: use Spreadsheet::WriteExcel();
   40: 
   41: my @SubmitButtons = ({ name => 'SelectAnother',
   42:                        text => 'Choose a different Problem' },
   43:                      { name => 'Generate',
   44:                        text => 'Generate Report'},
   45:                      );
   46: 
   47: sub BuildStudentSubmissionsPage {
   48:     my ($r,$c)=@_;
   49:     #
   50:     my %Saveable_Parameters = ('Status' => 'scalar',
   51:                                'Section' => 'array',
   52:                                'NumPlots' => 'scalar',
   53:                                );
   54:     &Apache::loncommon::store_course_settings('student_submissions',
   55:                                               \%Saveable_Parameters);
   56:     &Apache::loncommon::restore_course_settings('student_submissions',
   57:                                                 \%Saveable_Parameters);
   58:     #
   59:     &Apache::lonstatistics::PrepareClasslist();
   60:     #
   61:     $r->print(&CreateInterface());
   62:     #
   63:     my @Students = @Apache::lonstatistics::Students;
   64:     #
   65:     if (@Students < 1) {
   66:         $r->print('<h2>There are no students in the sections selected</h2>');
   67:     }
   68:     #
   69:     my @CacheButtonHTML = 
   70:         &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status',
   71:                                    '<h3>'.&mt('Loading student data').'</h3>');
   72:     $r->rflush();
   73:     #
   74:     if (exists($ENV{'form.problemchoice'}) && 
   75:         ! exists($ENV{'form.SelectAnother'})) {
   76:         foreach my $button (@SubmitButtons) {
   77:             if ($button->{'name'} eq 'break') {
   78:                 $r->print("<br />\n");
   79:             } else {
   80:                 $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
   81:                           'value="'.&mt($button->{'text'}).'" />');
   82:                 $r->print('&nbsp;'x5);
   83:             }
   84:         }
   85:         foreach my $html (@CacheButtonHTML) {
   86:             $r->print($html.('&nbsp;'x5));
   87:         }
   88:         #
   89:         $r->print('<hr />'.$/);
   90:         $r->rflush();
   91:         #
   92:         # Determine which problems we are to analyze
   93:         my @Symbs = 
   94:             &Apache::lonstathelpers::get_selected_symbs('problemchoice');
   95:         foreach my $selected (@Symbs) {
   96:             $r->print('<input type="hidden" name="problemchoice" value="'.
   97:                       $selected.'" />'.$/);
   98:         }
   99:         #
  100:         # Get resource objects
  101:         my $navmap = Apache::lonnavmaps::navmap->new();
  102:         if (!defined($navmap)) {
  103:             $r->print('<h1>'.&mt("Internal error").'</h1>');
  104:             return;
  105:         }
  106:         my %already_seen;
  107:         my @Problems;
  108:         foreach my $symb (@Symbs) {
  109:             my $resource = $navmap->getBySymb($symb);
  110:             push(@Problems,$resource);
  111:         }
  112:         #
  113:         if (! scalar(@Problems) || ! defined($Problems[0])) {
  114:             $r->print('resource is undefined');
  115:         } else {
  116:             if (scalar(@Problems) == 1) {
  117:                 my $resource = $Problems[0];
  118:                 $r->print('<h1>'.$resource->title.'</h1>');
  119:                 $r->print('<h3>'.$resource->src.'</h3>');
  120:                 if ($ENV{'form.renderprob'} eq 'true') {
  121:                     $r->print(
  122:                               &Apache::lonstathelpers::render_resource({src => $resource->src})
  123:                               );
  124:                     $r->rflush();
  125:                 }
  126:             }
  127:             &new_excel_output($r,\@Problems,\@Students);
  128:         }
  129:         $r->print('<hr />');
  130:     } else {
  131:         $r->print('<input type="submit" name="Generate" value="'.
  132:                   &mt('Prepare Report').'" />');
  133:         $r->print('&nbsp;'x5);
  134:         $r->print('<p>'.
  135:                   &mt('Computing correct answers greatly increasese the amount of time required to prepare a report.').
  136:                   '</p>');
  137:         $r->print('<p>'.
  138:                   &mt('please select problems and use the <b>Prepare Report</b> button to continue.').
  139:                   '</p>');
  140:         $r->print(&Apache::lonstathelpers::MultipleProblemSelector
  141:                   (undef,'problemchoice','Statistics'));
  142:     }
  143: }
  144: 
  145: #########################################################
  146: #########################################################
  147: 
  148: sub new_excel_output {
  149:     my ($r,$Problems,$Students) = @_;
  150:     my $c = $r->connection();
  151:     #
  152:     #
  153:     # Determine the number of columns in the spreadsheet
  154:     my $columncount = 3; # username, domain, id
  155:     my $response_multiplier = 1;
  156:     $response_multiplier ++   if ($ENV{'form.correctans'} eq 'true');
  157:     $response_multiplier += 4 if ($ENV{'form.prob_status'} eq 'true');
  158:     my $lastprob;
  159:     foreach my $prob (@$Problems) {
  160:         $columncount += ($response_multiplier * $prob->countResponses);
  161:         last if ($columncount > 255);
  162:         $lastprob = $prob;
  163:     }
  164:     if ($columncount > 255) {
  165:         $r->print('<h1>'.&mt('Unable to complete request').'</h1>'.$/.
  166:                   '<p>'.&mt('LON-CAPA is unable to produce your Excel spreadsheet because your selections will result in more than 255 columns.  Excel allows only 255 columns in a spreadsheet.').'</p>'.$/.
  167:                   '<p>'.&mt('Consider selecting fewer problems to generate reports on, or reducing the number of items per problem.  Or use HTML or CSV output.').'</p>'.$/.
  168:                   '<p>'.&mt('The last problem that will fit in the current spreadsheet is [_1].',&get_title($lastprob->title,$lastprob->src)).'</p>');
  169:         $r->rflush();
  170:         return;
  171:     }
  172:     #
  173:     # Print out a message telling them what we are doing
  174:     if (scalar(@$Problems) > 1) {
  175:         $r->print('<h2>'.
  176:                   &mt('Preparing Excel spreadsheet of student responses to [_1] problems',
  177:                       scalar(@$Problems)).
  178:                   '</h2>');
  179:     } else {
  180:         $r->print('<h2>'.
  181:                   &mt('Preparing Excel spreadsheet of student responses').
  182:                   '</h2>');
  183:     }
  184:     $r->rflush();
  185:     #
  186:     # Create the excel spreadsheet
  187:     my $filename = '/prtspool/'.
  188:         $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
  189:         time.'_'.rand(1000000000).'.xls';
  190:     my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
  191:     if (! defined($workbook)) {
  192:         $r->log_error("Error creating excel spreadsheet $filename: $!");
  193:         $r->print('<p>'.&mt("Unable to create new Excel file.  ".
  194:                             "This error has been logged.  ".
  195:                             "Please alert your LON-CAPA administrator").
  196:                   '</p>');
  197:         return undef;
  198:     }
  199:     #
  200:     $workbook->set_tempdir('/home/httpd/perl/tmp');
  201:     #
  202:     my $format = &Apache::loncommon::define_excel_formats($workbook);
  203:     my $worksheet  = $workbook->addworksheet('Student Submission Data');
  204:     #
  205:     # Add headers to the worksheet
  206:     my $rows_output = 0;
  207:     $worksheet->write($rows_output++,0,
  208:                     $ENV{'course.'.$ENV{'request.course.id'}.'.description'},
  209:                       $format->{'h1'});
  210:     $rows_output++;
  211:     my $cols_output = 0;
  212:     my $title_row  = $rows_output++;
  213:     my $partid_row = $rows_output++;
  214:     my $respid_row = $rows_output++;
  215:     my $header_row = $rows_output++;
  216:     $worksheet->write($title_row ,0,'Problem Title',$format->{'bold'});
  217:     $worksheet->write($partid_row,0,'Part ID',$format->{'bold'});
  218:     $worksheet->write($respid_row,0,'Response ID',$format->{'bold'});
  219:     # Student headers
  220:     my @StudentColumns = ('username','domain','id');
  221:     foreach (@StudentColumns) {
  222:         $worksheet->write($header_row,$cols_output++,ucfirst($_),
  223:                           $format->{'bold'});
  224:     }
  225:     # Problem headers
  226:     foreach my $prob (@$Problems) {
  227:         my $title = &get_title($prob->title,$prob->src);
  228:         $worksheet->write($title_row,$cols_output,
  229:                           $title,$format->{'h3'});
  230:         foreach my $partid (@{$prob->parts}) {
  231:             $worksheet->write($partid_row,$cols_output,$partid);
  232:             my $responses = [$prob->responseIds($partid)];
  233:             my $resptypes = [$prob->responseType($partid)];
  234:             for (my $i=0;$i<scalar(@$responses);$i++) {
  235:                 $worksheet->write($respid_row,$cols_output,
  236:                                   $resptypes->[$i].', '.$responses->[$i]);
  237:                 $worksheet->write($header_row,$cols_output,'Submission');
  238:                 $cols_output++;
  239:                 if ($ENV{'form.correctans'} eq 'true') {
  240:                     $worksheet->write($header_row,$cols_output,'Correct');
  241:                     $cols_output++;
  242:                 }
  243:                 if ($ENV{'form.prob_status'} eq 'true') {
  244:                     $worksheet->write($header_row,$cols_output++,
  245:                                       'Award Detail');
  246:                     $worksheet->write($header_row,$cols_output++,'Attempt');
  247:                     $worksheet->write($header_row,$cols_output++,'Time');
  248:                     $worksheet->write($header_row,$cols_output++,'Awarded');
  249:                 }
  250:             }
  251:         }
  252:     }
  253:     #
  254:     # Populate the worksheet with the student data
  255:     my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
  256:         ($r,'Excel File Compilation Status',
  257:          'Excel File Compilation Progress', 
  258:          scalar(@$Students),'inline',undef,'Statistics','stats_status');
  259:     my $max_row = $rows_output;
  260:     foreach my $student (@$Students) {
  261:         last if ($c->aborted());
  262:         $cols_output = 0;
  263:         my $student_row = $max_row;
  264:         foreach my $field (@StudentColumns) {
  265:             $worksheet->write($student_row,$cols_output++,
  266:                               $student->{$field});
  267:         }
  268:         my $last_student_col = $cols_output-1;
  269:         my $response_count;
  270:         foreach my $prob (@$Problems) {
  271:             foreach my $partid (@{$prob->parts}) {
  272:                 my @Response = $prob->responseIds($partid);
  273:                 my @ResponseType = $prob->responseType($partid);
  274:                 for (my $i=0;$i<=$#Response;$i++) {
  275:                     my $response_start_col = $last_student_col + 
  276:                         $response_count * $response_multiplier + 1;
  277:                     $response_count++;
  278:                     my $respid   = $Response[$i];
  279:                     my $resptype = $ResponseType[$i];
  280:                     my $results = 
  281:                         &Apache::loncoursedata::get_response_data_by_student
  282:                         ($student,$prob->symb(),$respid);
  283:                     if (! defined($results)) {
  284:                         $results = [];
  285:                     }
  286:                     #
  287:                     $rows_output = $student_row;
  288:                     #
  289:                     for (my $j=scalar(@$results)-1;$j>=0;$j--) {
  290:                         $cols_output = $response_start_col;
  291:                         my $response = $results->[$j];
  292:                         if ($ENV{'form.all_sub'} ne 'true') {
  293:                             next if ($j ne scalar(@$results)-1);
  294:                         }
  295:                         my $cols_output = &write_excel_row
  296:                             ($worksheet,
  297:                              $rows_output++,$cols_output,
  298:                              $response,$student,
  299:                              $prob,$partid,$respid,
  300:                              $format,$resptype);
  301:                         if ($rows_output > $max_row) {
  302:                             $max_row = $rows_output;
  303:                         }
  304:                     }
  305:                 }
  306:             }
  307:         }
  308:         $rows_output++;
  309:         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
  310:                                                  'last student');
  311:     }
  312:     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
  313:     #
  314:     # Close the excel file
  315:     $workbook->close();
  316:     #
  317:     # Write a link to allow them to download it
  318:     $r->print('<p><a href="'.$filename.'">'.
  319:               &mt('Your Excel spreadsheet.').
  320:               '</a></p>'."\n");
  321:     $r->print('<script>'.
  322:               'window.document.Statistics.stats_status.value="'.
  323:               'Done compiling spreadsheet.  See link below to download.'.
  324:               '";</script>');
  325:     $r->rflush();
  326:     return;
  327: }
  328: 
  329: sub write_excel_row {
  330:     my ($worksheet,$row,$col,$response,$student,$prob,$partid,$respid,
  331:         $format,$resptype) = @_;
  332:     # 
  333:     my $submission =$response->[&Apache::loncoursedata::RDs_submission()];
  334:     $submission = &excel_format_response($submission,$resptype);
  335:     $worksheet->write($row,$col++,$submission);
  336:     if ($ENV{'form.correctans'} eq 'true') {
  337:         my $correct = &Apache::lonstathelpers::analyze_problem_as_student
  338:             ($prob,$student->{'username'},$student->{'domain'},
  339:              $partid,$respid);
  340:         $correct =&excel_format_response($correct,$resptype);
  341:         $worksheet->write($row,$col++,$correct);
  342:     }
  343:     if ($ENV{'form.prob_status'} eq 'true') {
  344:         $worksheet->write
  345:             ($row,$col++,
  346:              $response->[&Apache::loncoursedata::RDs_awarddetail()]);
  347:         $worksheet->write
  348:             ($row,$col++,$response->[&Apache::loncoursedata::RDs_tries()]);
  349:         $worksheet->write
  350:             ($row,$col++,
  351:              &Apache::lonstathelpers::calc_serial
  352:              ($response->[&Apache::loncoursedata::RDs_timestamp()]),
  353:              $format->{'date'});
  354:         $worksheet->write
  355:             ($row,$col++,$response->[&Apache::loncoursedata::RDs_awarded()]);
  356:     }
  357:     return $col;
  358: }
  359: 
  360: sub get_title {
  361:     my ($title,$src) = @_;
  362:     if ($title eq '') {
  363:         ($title) = ($src =~ m|/([^/]+)$|);
  364:     } else {
  365:         $title =~ s/\&colon;/:/g;
  366:     }
  367:     return $title;
  368: }
  369: 
  370: sub excel_format_response {
  371:     my ($answer,$responsetype) = @_;
  372:     if ($responsetype eq 'radiobutton') {
  373:         $answer =~ s/=([^=])$//;
  374:     } elsif ($responsetype =~ /^(option|match)$/) {
  375:         $answer = join("\n",
  376:                        map { 
  377:                            &Apache::lonnet::unescape($_) ;
  378:                        } sort split('&',$answer)
  379:                        );
  380:     }
  381:     if ($answer =~ m/^=/) {
  382:         $answer = ' '.$answer;
  383:     }
  384:     return $answer;
  385: }
  386: 
  387: ##
  388: ## Currently not used
  389: sub get_problem_data {
  390:     my ($r,$Problems) = @_;
  391:     #
  392:     # Analyze 
  393:     my %Data;
  394:     if (scalar(@$Problems) > 5) {
  395:         # progress window
  396:         my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
  397:             ($r,'Problem Analysis Status',
  398:              'Problem Analysis Progress', 
  399:              scalar(@$Problems),
  400:              'inline',undef,'Statistics','stats_status');
  401:         foreach my $problem (@$Problems) {
  402:             $Data{$problem->symb} = 
  403:             {&Apache::lonstathelpers::get_problem_data
  404:                  ($problem->src)};
  405:             &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
  406:                                                      'last problem');
  407:         }
  408:         &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
  409:     } else {
  410:         foreach my $problem (@$Problems) {
  411:             $Data{$problem->symb} = 
  412:             {&Apache::lonstathelpers::get_problem_data
  413:                  ($problem->src)};
  414:         }
  415:     }
  416:     return \%Data;
  417: }
  418: 
  419: 
  420: =pod
  421: 
  422: #########################################################
  423: #########################################################
  424: 
  425: my @DefaultColumns = 
  426:     (
  427:      {name=>'username',
  428:       display=>'Student'},
  429:      {name=>'domain',
  430:       display=>'Domain'},
  431:      {name => 'id',
  432:       display => 'Id'},
  433:      # FIXME: Probably need to add score
  434:     );
  435: 
  436: my @PartColumns = 
  437:     (
  438:      {name => 'time',
  439:       display =>'Time'},
  440:      {name => 'attempt',
  441:       display =>'Attempt'},
  442:      {name => 'awarded',
  443:       display =>'Award'},
  444:      {name => 'weight',
  445:       display =>'Part Weight'},
  446:      {name => 'score',
  447:       display =>'Score'},
  448:      );
  449: 
  450: my @ResponseColumns = 
  451:     (
  452:      {name => 'submission',
  453:       display =>'Submission'},
  454:      {name => 'answer',
  455:       display =>'Correct Answer'},
  456:      {name => 'awarddetail',
  457:       display =>'Awarddetail'},
  458:      );
  459: 
  460: sub get_response_type {
  461:     my ($resource,$partid,$respid) = @_;
  462:     my $response_type = '';
  463:     for (my $i=0;
  464:          $i<scalar(@{$resource->{'partdata'}->{$partid}->{'ResponseIds'}});
  465:          $i++) {
  466:         if($resource->{'partdata'}->{$partid}->{'ResponseIds'}->[$i] eq $respid){
  467:             $response_type = 
  468:                 $resource->{'partdata'}->{$partid}->{'ResponseTypes'}->[$i];
  469:             last;
  470:         }
  471:     }
  472:     return $response_type;
  473: }
  474: 
  475: 
  476: #########################################################
  477: #########################################################
  478: ##
  479: ##    prepare_html_output
  480: ##
  481: #########################################################
  482: #########################################################
  483: sub prepare_html_output {
  484:     my ($r,$Problems,$Students) = @_;
  485:     my $problem;
  486:     my $c = $r->connection();
  487:     my ($resource,$respid,$partid) = ($problem->{'resource'},
  488:                                       $problem->{'respid'},
  489:                                       $problem->{'part'});
  490:     #
  491:     if ($ENV{'form.correctans'} eq 'true') {
  492:         $r->print('<h2>'.&mt('Generating Correct Answers').'</h2>');
  493:         &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$Students,
  494:                                                    'Statistics',
  495:                                                    'stats_status');
  496:     }
  497:     #
  498:     $r->print('<h2>'.&mt('Student Responses').'</h2>');
  499:     #
  500:     $r->rflush();
  501:     my $response_type = &get_response_type($resource,$partid,$respid);
  502:     if (! defined($response_type)) {
  503:         $r->print('<h2>'.&mt('Unable to determine response type').'</h2>');
  504:         return;
  505:     }
  506:     my $count = 0;
  507:     my @Columns;
  508:     if (exists($ENV{'form.concise'}) && $ENV{'form.concise'} eq 'true') {
  509:         foreach (@DefaultColumns) {
  510:             if ($_->{'name'} =~ /^(username|domain|id)$/){
  511:                 push(@Columns,$_);
  512:             }
  513:         }
  514:     } else {
  515:         @Columns = @DefaultColumns;
  516:     }
  517:     my $header = '<table>'.$/.&html_headers(\@Columns);
  518:     if ($response_type eq 'essay') {
  519:         $header .= &html_essay_headers();
  520:     } elsif ($response_type eq 'option') {
  521:         $header .= &html_option_headers();
  522:     } else {
  523:         $header .= &html_generic_headers();
  524:     }
  525:     $header = '<tr>'.$header.'</tr>';
  526:     #
  527:     $r->print($/.$header.$/);
  528:     foreach my $student (@$Students) {
  529:         if ($count >= 50) {
  530:             $r->print('</table>'.$/.$header.$/);
  531:             $count = 0;
  532:         }
  533:         last if ($c->aborted());
  534:         my $results = &Apache::loncoursedata::get_response_data_by_student
  535:             ($student,$resource->{'symb'},$respid);
  536:         next if (! defined($results) || ref($results) ne 'ARRAY');
  537:         for (my $i=0;$i<scalar(@$results);$i++) {
  538:             my $response = $results->[$i];
  539:             if ($ENV{'form.last_sub_only'} eq 'true' && 
  540:                 $i < (scalar(@$results)-1)) {
  541:                 next;
  542:             }
  543:             my $data;
  544:             $data->{'username'} = $student->{'username'};
  545:             $data->{'domain'}   = $student->{'domain'};
  546:             $data->{'id'} = $student->{'id'};
  547:             $data->{'fullname'} = $student->{'fullanem'};
  548:             $data->{'status'} = $student->{'status'};
  549:             $data->{'time'} = &Apache::lonlocal::locallocaltime
  550:                 ($response->[&Apache::loncoursedata::RDs_timestamp()]);
  551:             $data->{'attempt'} = 
  552:                 $response->[&Apache::loncoursedata::RDs_tries()];
  553:             $data->{'awarded'} = 
  554:                 $response->[&Apache::loncoursedata::RDs_awarded()];
  555:             $data->{'awarddetail'} = 
  556:                 $response->[&Apache::loncoursedata::RDs_awarddetail()];
  557:             $data->{'weight'} = &Apache::lonnet::EXT
  558:                 ('resource.'.$partid.'.weight',$resource->{'symb'},
  559:                  undef,undef,undef);
  560:             $data->{'score'} = $data->{'weight'} * $data->{'awarded'};
  561:             my $rowextra = 'bgcolor="#CCCCCC"';
  562:             if ($count % 2 == 1) {
  563:                 $rowextra = 'bgcolor="#EEEEEE"';
  564:             }
  565:             my $row = '<tr '.$rowextra.'>';
  566:             foreach my $col (@Columns) {
  567:                 $row .= '<td valign="top">'.
  568:                     $data->{$col->{'name'}}.'</td>';
  569:             }
  570:             if ($response_type eq 'essay') {
  571:                 $row .= &html_essay_results
  572:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  573:                      $student->{'answer'},
  574:                      scalar(@Columns),$rowextra);
  575:             } elsif ($response_type eq 'option') {
  576:                 $row .= &html_option_results
  577:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  578:                      $student->{'answer'},
  579:                      scalar(@Columns),$rowextra);
  580:             } else {
  581:                 $row .= &html_generic_results
  582:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  583:                      $student->{'answer'},
  584:                      scalar(@Columns),$rowextra);
  585:             }
  586:             $row .= '</tr>';
  587:             $r->print($row.$/);
  588:             $count++;
  589:         }
  590:     }
  591:     $r->print('</table>'.$/);
  592:     return;
  593: }
  594: 
  595: #####################################################
  596: ##
  597: ##     HTML helper routines
  598: ##
  599: #####################################################
  600: sub html_headers {
  601:     my ($Columns) = @_;
  602:     my $Str;
  603:     foreach my $column (@$Columns) {
  604:         $Str .= '<th align="left">'.$column->{'display'}.'</th>';
  605:     }
  606:     return $Str;
  607: }
  608: 
  609: sub html_essay {
  610:     my ($submission,$correct,$tablewidth,$rowextra)=@_;
  611:     #
  612:     $submission =~ s|\\r\\n|$/|g;
  613:     $submission = &HTML::Entities::encode($submission,'<>&"');
  614:     $submission =~ s|$/\s*$/|$/</p><p>$/|g;
  615:     $submission =~ s|\\||g;
  616:     $submission = '<p>'.$submission.'</p>';
  617:     #
  618:     my $Str  = '</tr><tr '.$rowextra.'>'.
  619:         '<td colspan="'.$tablewidth.'">'.$submission.'</td>';
  620:     if ($ENV{'form.correctans'} eq 'true') {
  621:         $Str .= '</tr>';
  622:         if (defined($correct) && $correct !~ /^\s*$/) {
  623:             $Str .= '<tr '.$rowextra.'><td colspan="'.$tablewidth.'">'.
  624:                 '<b>'.&mt('Correct Answer:').'</b>'.$correct.'</td>';
  625:         }
  626:     }
  627:     $Str .= '</tr>';
  628:     #
  629:     return $Str;
  630: }
  631: 
  632: sub html_essay_headers {
  633:     return '';
  634: }
  635: 
  636: sub html_generic_headers {
  637:     my $header ='<th>'.&mt('Submission').'</th>';
  638:     if ($ENV{'form.correctans'} eq 'true') {
  639:         $header .= '<th>'.&mt('Correct').'</th>';
  640:     }
  641:     return $header;
  642: }
  643: 
  644: sub html_option_headers {
  645:     return &html_generic_headers();
  646: }
  647: 
  648: sub html_radiobutton_results {
  649:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  650:     $submission =~ s/=([^=])$//;
  651:     return &html_generic_results($submission,$correct,$tablewidth,$rowclass);
  652: }
  653: 
  654: sub html_generic_results {
  655:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  656:     my $Str .= '<td>'.$submission.'</td>';
  657:     if ($ENV{'form.correctans'} eq 'true') {
  658:         $Str .= '<td>'.$correct.'</td>';
  659:     }
  660:     $Str .= '</tr>';
  661:     return $Str;
  662: }
  663: 
  664: sub html_option_results {
  665:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  666:     $submission = 
  667:         '<ul class="sub_studentans">'.
  668:         '<li>'.join('</li><li>',
  669:                     map { 
  670:                         &Apache::lonnet::unescape($_) ;
  671:                     } sort split('&',$submission)
  672:                     ).
  673:                     '</li><ul>';
  674:     if (defined($correct) && $correct !~ /^\s*$/) {
  675:         $correct = '<ul class="sub_correctans">'.
  676:             '<li>'.join('</li><li>',
  677:                         map { 
  678:                             &Apache::lonnet::unescape($_) ;
  679:                         } sort split('&',$correct)
  680:                         ).
  681:                         '</li></ul>';
  682:     }
  683:     #
  684:     return &html_generic_results($submission,$correct,$tablewidth,$rowclass);
  685: }
  686: 
  687: #########################################################
  688: #########################################################
  689: ##
  690: ##      CSV output of student answers
  691: ##
  692: #########################################################
  693: #########################################################
  694: sub prepare_csv_output {
  695:     my ($r,$Problems,$Students) = @_;
  696:     my $problem;
  697:     #
  698:     my $c = $r->connection();
  699:     my ($resource,$respid,$partid) = ($problem->{'resource'},
  700:                                       $problem->{'respid'},
  701:                                       $problem->{'part'});
  702:     #
  703:     if ($ENV{'form.correctans'} eq 'true') {
  704:         $r->print('<h2>'.&mt('Generating Correct Answers').'</h2>');
  705:         &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$Students,
  706:                                                    'Statistics',
  707:                                                    'stats_status');
  708:     }
  709:     #
  710:     $r->print('<h2>'.
  711:               &mt('Generating CSV report of student responses').'</h2>');
  712:     #
  713:     # Progress window
  714:     my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
  715:         ($r,'CSV File Compilation Status',
  716:          'CSV File Compilation Progress', 
  717:          scalar(@$Students),'inline',undef,'Statistics','stats_status');
  718: 
  719:     $r->rflush();
  720:     #
  721:     # Open a file
  722:     my $outputfile;
  723:     my $filename = '/prtspool/'.
  724:         $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
  725:             time.'_'.rand(1000000000).'.csv';
  726:     unless ($outputfile = Apache::File->new('>/home/httpd'.$filename)) {
  727:         $r->log_error("Couldn't open $filename for output $!");
  728:         $r->print("Problems occured in writing the csv file.  ".
  729:                   "This error has been logged.  ".
  730:                   "Please alert your LON-CAPA administrator.");
  731:         $outputfile = undef;
  732:     }
  733:     #
  734:     #
  735:     my @Columns;
  736:     if (exists($ENV{'form.concise'}) && $ENV{'form.concise'} eq 'true') {
  737:         foreach (@DefaultColumns) {
  738:             if ($_->{'name'} =~ /^(username|domain|id)$/){
  739:                 push(@Columns,$_);
  740:             }
  741:         }
  742:     } else {
  743:         @Columns = @DefaultColumns;
  744:     }
  745:     #
  746:     my $response_type = &get_response_type($resource,$partid,$respid);
  747:     if (! defined($response_type) || $response_type eq '') {
  748:         $r->print('<h2>'.&mt('Unable to determine response type').'</h2>');
  749:         return;
  750:     }
  751:     #
  752:     my $header = &csv_headers(\@Columns).','.&csv_generic_headers();
  753:     print $outputfile $header.$/;
  754:     #
  755:     foreach my $student (@$Students) {
  756:         last if ($c->aborted());
  757:         my $results = &Apache::loncoursedata::get_response_data_by_student
  758:             ($student,$resource->{'symb'},$respid);
  759:         next if (! defined($results) || ref($results) ne 'ARRAY');
  760:         for (my $i=0;$i<scalar(@$results);$i++) {
  761:             my $response = $results->[$i];
  762:             if ($ENV{'form.last_sub_only'} eq 'true' && 
  763:                 $i < (scalar(@$results)-1)) {
  764:                 next;
  765:             }
  766:             my $data;
  767:             $data->{'username'} = $student->{'username'};
  768:             $data->{'domain'}   = $student->{'domain'};
  769:             $data->{'id'} = $student->{'id'};
  770:             $data->{'fullname'} = $student->{'fullanem'};
  771:             $data->{'status'} = $student->{'status'};
  772:             $data->{'time'} = &Apache::lonlocal::locallocaltime
  773:                 ($response->[&Apache::loncoursedata::RDs_timestamp()]);
  774:             $data->{'attempt'} = 
  775:                 $response->[&Apache::loncoursedata::RDs_tries()];
  776:             $data->{'awarded'} = 
  777:                 $response->[&Apache::loncoursedata::RDs_awarded()];
  778:             $data->{'awarddetail'} = 
  779:                 $response->[&Apache::loncoursedata::RDs_awarddetail()];
  780:             $data->{'weight'} = &Apache::lonnet::EXT
  781:                 ('resource.'.$partid.'.weight',$resource->{'symb'},
  782:                  undef,undef,undef);
  783:             $data->{'score'} = $data->{'weight'} * $data->{'awarded'};
  784:             my $rowextra = '';
  785:             my $row;
  786:             foreach my $col (@Columns) {
  787:                 $row .= '"'.
  788:                     &Apache::loncommon::csv_translate($data->{$col->{'name'}}).'",';
  789:             }
  790:             if ($response_type eq 'option') {
  791:                 $row .= &csv_option_results
  792:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  793:                      $student->{'answer'},
  794:                      scalar(@Columns),$rowextra);
  795:             } elsif ($response_type eq 'radiobutton') {
  796:                 $row .= &csv_radiobutton_results
  797:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  798:                      $student->{'answer'},
  799:                      scalar(@Columns),$rowextra);
  800:             } else {
  801:                 $row .= &csv_generic_results
  802:                     ($response->[&Apache::loncoursedata::RDs_submission()],
  803:                      $student->{'answer'},
  804:                      scalar(@Columns),$rowextra);
  805:             }
  806:             print $outputfile $row.$/;
  807:         }
  808:         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
  809:                                                  'last student');
  810:     }
  811:     close($outputfile);
  812:     #
  813:     # Close the progress window
  814:     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
  815:     #
  816:     # Tell the user where to get their csv file
  817:     $r->print('<br />'.
  818:               '<a href="'.$filename.'">'.&mt('Your csv file.').'</a>'."\n");
  819:     $r->rflush();
  820:     return;
  821: }
  822: 
  823: sub csv_headers {
  824:     my ($Columns) = @_;
  825:     my $Str;
  826:     foreach my $column (@$Columns) {
  827:         $Str .= 
  828:             '"'.&Apache::loncommon::csv_translate($column->{'display'}).'",';
  829:     }
  830:     chop($Str);
  831:     return $Str;
  832: }
  833: 
  834: sub csv_generic_headers {
  835:     my ($title) = @_;
  836:     if (! defined($title)) {
  837:         $title = &mt('Submission');
  838:     }
  839:     my $header = '"'.&Apache::loncommon::csv_translate($title).'"';
  840:     if ($ENV{'form.correctans'} eq 'true') {
  841:         $header .= ',"'.&Apache::loncommon::csv_translate(&mt('Correct')).'"';
  842:     }
  843:     return $header;
  844: }
  845: 
  846: #------------------------------------------
  847: sub csv_essay_results {
  848:     my ($submission,$correct,$tablewidth,$rowextra)=@_;
  849:     #
  850:     $submission =~ s|\\r|\\\\r|g;
  851:     $submission =~ s|\\n|\\\\n|g;
  852:     #
  853:     return &csv_generic_results($submission,$correct,$tablewidth);
  854: }
  855: 
  856: #------------------------------------------
  857: sub csv_radiobutton_results {
  858:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  859:     $submission =~ s/=[^=]*$//;
  860:     return &csv_generic_results($submission,$correct,$tablewidth,$rowclass);
  861: }
  862: 
  863: #------------------------------------------
  864: sub csv_option_results {
  865:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  866:     $submission = join(',',
  867:                        map { 
  868:                            &Apache::lonnet::unescape($_) ;
  869:                        } sort split('&',$submission)
  870:                        );
  871:     if (defined($correct) && $correct !~ /^\s*$/) {
  872:         $correct =join(',',
  873:                        map { 
  874:                            &Apache::lonnet::unescape($_) ;
  875:                        } sort split('&',$submission));
  876:     }
  877:     return &csv_generic_results($submission,$correct,$tablewidth,$rowclass);
  878: }
  879: 
  880: #------------------------------------------
  881: sub csv_generic_results {
  882:     my ($submission,$correct,$tablewidth,$rowclass)=@_;
  883:     my $Str .= 
  884:         '"'.&Apache::loncommon::csv_translate($submission).'"';
  885:     if ($ENV{'form.correctans'} eq 'true') {
  886:         $Str .= ',"'.&Apache::loncommon::csv_translate($correct).'"';
  887:     }
  888:     return $Str;
  889: }
  890: 
  891: #########################################################
  892: #########################################################
  893: ##
  894: ##      Excel output of student answers and correct answers
  895: ##
  896: #########################################################
  897: #########################################################
  898: sub prepare_excel_output {
  899:     my ($r,$Problems,$Students) = @_;
  900:     my $c = $r->connection();
  901:     #
  902:     $r->print('<h2>'.
  903:               &mt('Preparing Excel spreadsheet of student responses').
  904:               '</h2>');
  905:     if ($ENV{'form.correctans'} eq 'true') {
  906:         $r->print('<p>'.
  907:                   &mt('See the status bar above for student answer computation progress').
  908:                   '</p>');
  909:         foreach my $problem (@$Problems) {
  910:             my ($resource,$respid,$partid) = ($problem->{'resource'},
  911:                                               $problem->{'respid'},
  912:                                               $problem->{'part'});
  913:             #
  914:             &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$Students,
  915:                                                        'Statistics',
  916:                                                        'stats_status');
  917:         }
  918:         $r->print('<script>'.
  919:                   'window.document.Statistics.stats_status.value="'.
  920:                   'Done computing student answers.  Compiling spreadsheet.'.
  921:                   '";</script>');
  922:     }
  923:     #
  924:     $r->rflush();
  925:     
  926: 
  927:     my @ColumnLabels;
  928:     my @Columns = @DefaultColumns;
  929:     my %seen;
  930:     foreach my $problem (@$Problems) {
  931:         my ($resource,$respid,$partid) = ($problem->{'resource'},
  932:                                           $problem->{'respid'},
  933:                                           $problem->{'part'});
  934:         my $partkey = $resource->{'symb'}.':'.$partid;
  935:         if (! $seen{$partkey}) {
  936:             $ColumnLabels[$#Columns]=$resource->{'title'};
  937:             push(@ColumnLabels,$partid);
  938:             push(@Columns,@PartColumns);
  939:         }
  940:         push(@Column
  941:         if ($ENV{'form.correctans'} eq 'true') {
  942:             push(@Columns,'Computers answer');
  943:         }
  944:         $seen{$resource->{'symb'}.':'.$partid} .= ':'.$respid;
  945: 
  946:     }
  947: 
  948: #    my ($awarded_col,$weight_col);
  949: #    for (my $i=0;$i<=$#Columns;$i++) {
  950: #        if ($Columns[$i]->{'name'} eq 'weight' ) { $weight_col = $i; }
  951: #        if ($Columns[$i]->{'name'} eq 'awarded') { $awarded_col = $i; }
  952: #    }
  953: 
  954:     #
  955:     # Create excel worksheet
  956:     my $filename = '/prtspool/'.
  957:         $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
  958:         time.'_'.rand(1000000000).'.xls';
  959:     my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
  960:     if (! defined($workbook)) {
  961:         $r->log_error("Error creating excel spreadsheet $filename: $!");
  962:         $r->print('<p>'.&mt("Unable to create new Excel file.  ".
  963:                             "This error has been logged.  ".
  964:                             "Please alert your LON-CAPA administrator").
  965:                   '</p>');
  966:         return undef;
  967:     }
  968:     #
  969:     $workbook->set_tempdir('/home/httpd/perl/tmp');
  970:     #
  971:     my $format = &Apache::loncommon::define_excel_formats($workbook);
  972:     my $worksheet  = $workbook->addworksheet('Student Submission Data');
  973:     #
  974:     # Make sure we get new weight data instead of data on a 10 minute delay
  975:     &Apache::lonnet::clear_EXT_cache_status();
  976:     #
  977:     # Put on the standard headers and whatnot
  978:     my $rows_output=0;
  979:     $worksheet->write($rows_output++,0,$resource->{'title'},$format->{'h1'});
  980:     $worksheet->write($rows_output++,0,$resource->{'src'},$format->{'h3'});
  981:     $rows_output++;
  982:     $worksheet->write_row($rows_output++,0,
  983:                           [map {$_->{'display'}} @Columns],
  984:                           $format->{'bold'});
  985:     #
  986:     # Populate the worksheet with the student data
  987:     my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
  988:         ($r,'Excel File Compilation Status',
  989:          'Excel File Compilation Progress', 
  990:          scalar(@$Students),'inline',undef,'Statistics','stats_status');
  991:     foreach my $student (@$Students) {
  992:         last if ($c->aborted());
  993:         my $results = &Apache::loncoursedata::get_response_data_by_student
  994:             ($student,$resource->{'symb'},$respid);
  995:         my %row;
  996:         $row{'username'} = $student->{'username'};
  997:         $row{'domain'}   = $student->{'domain'};
  998:         $row{'id'}       = $student->{'id'};
  999:         $row{'correct'}  = $student->{'answer'};
 1000:         $row{'weight'} = &Apache::lonnet::EXT
 1001:             ('resource.'.$partid.'.weight',$resource->{'symb'},
 1002:              undef,undef,undef);
 1003:         if (! defined($results) || ref($results) ne 'ARRAY') {
 1004:             $row{'score'} = '='.
 1005:                 &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
 1006:                     ($rows_output,$awarded_col)
 1007:                 .'*'.
 1008:                 &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
 1009:                     ($rows_output,$weight_col);
 1010:             my $cols_output = 0;
 1011:             foreach my $col (@Columns) {
 1012:                 if (! exists($row{$col->{'name'}})) {
 1013:                     $cols_output++;
 1014:                     next;
 1015:                 }
 1016:                 $worksheet->write($rows_output,$cols_output++,
 1017:                                   $row{$col->{'name'}});
 1018:             }
 1019:             $rows_output++;
 1020:         } else {
 1021:             for (my $i=0;$i<scalar(@$results);$i++) {
 1022:                 my $response = $results->[$i];
 1023:                 if ($ENV{'form.last_sub_only'} eq 'true' && 
 1024:                     $i < (scalar(@$results)-1)) {
 1025:                     next;
 1026:                 }
 1027:                 delete($row{'time'});
 1028:                 delete($row{'attempt'});
 1029:                 delete($row{'submission'});
 1030:                 delete($row{'awarded'});
 1031:                 delete($row{'grading'});
 1032:                 delete($row{'score'});
 1033:                 my %row_format;
 1034:                 #
 1035:                 # Time is handled differently
 1036:                 $row{'time'} = &Apache::lonstathelpers::calc_serial
 1037:                     ($response->[&Apache::loncoursedata::RDs_timestamp()]);
 1038:                 $row_format{'time'}=$format->{'date'};
 1039:                 #
 1040:                 $row{'attempt'}  = $response->[
 1041:                      &Apache::loncoursedata::RDs_tries()];
 1042:                 $row{'submission'} = $response->[
 1043:                      &Apache::loncoursedata::RDs_submission()];
 1044:                 if ($row{'submission'} =~ m/^=/) {
 1045:                     # This will be interpreted as a formula.  That is bad!
 1046:                     $row{'submission'} = " ".$row{'submission'};
 1047:                 }
 1048:                 $row{'awarddetail'} = $response->[
 1049:                      &Apache::loncoursedata::RDs_awarddetail()];
 1050:                 $row{'awarded'} = $response->[
 1051:                      &Apache::loncoursedata::RDs_awarded()];
 1052:                 $row{'score'} = '='.
 1053:                     &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
 1054:                         ($rows_output,$awarded_col)
 1055:                     .'*'.
 1056:                     &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
 1057:                         ($rows_output,$weight_col);
 1058:                 my $cols_output = 0;
 1059:                 foreach my $col (@Columns) {
 1060:                     $worksheet->write($rows_output,$cols_output++,$row{$col->{'name'}},
 1061:                                       $row_format{$col->{'name'}});
 1062:                 }
 1063:                 $rows_output++;
 1064:             }
 1065:         } # End of else clause on if (! defined($results) ....
 1066:         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
 1067:                                                  'last student');
 1068:     }
 1069:     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
 1070:     #
 1071:     # Close the excel file
 1072:     $workbook->close();
 1073:     #
 1074:     # Write a link to allow them to download it
 1075:     $r->print('<p><a href="'.$filename.'">'.
 1076:               &mt('Your Excel spreadsheet.').
 1077:               '</a></p>'."\n");
 1078:     $r->print('<script>'.
 1079:               'window.document.Statistics.stats_status.value="'.
 1080:               'Done compiling spreadsheet.  See link below to download.'.
 1081:               '";</script>');
 1082:     $r->rflush();
 1083:     return;
 1084: }
 1085: 
 1086: =cut
 1087: 
 1088: #########################################################
 1089: #########################################################
 1090: ##
 1091: ##   Generic Interface Routines
 1092: ##
 1093: #########################################################
 1094: #########################################################
 1095: sub CreateInterface {
 1096:     ##
 1097:     ## Output Selection
 1098:     my $output_selector = $/.'<select name="output">'.$/;
 1099:     foreach ('HTML','Excel','CSV') {
 1100:         $output_selector .= '    <option value="'.lc($_).'"';
 1101:         if ($ENV{'form.output'} eq lc($_)) {
 1102:             $output_selector .= ' selected ';
 1103:         }
 1104:         $output_selector .='>'.&mt($_).'</option>'.$/;
 1105:     } 
 1106:     $output_selector .= '</select>'.$/;
 1107:     ##
 1108:     ## Environment variable initialization
 1109:     my $Str = '';
 1110:     $Str .= &Apache::lonhtmlcommon::breadcrumbs
 1111:         (undef,'Student Submission Reports');
 1112:     $Str .= '<p>';
 1113:     $Str .= '<table cellspacing="5">'."\n";
 1114:     $Str .= '<tr>';
 1115:     $Str .= '<th>'.&mt('Sections').'</th>';
 1116:     $Str .= '<th>'.&mt('Enrollment Status').'</th>';
 1117:     $Str .= '<th>'.&mt('Output Options').'</th>';
 1118:     $Str .= '</tr>'."\n";
 1119:     #
 1120:     $Str .= '<tr><td align="center">'."\n";
 1121:     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
 1122:     $Str .= '</td>';
 1123:     #
 1124:     $Str .= '<td align="center">';
 1125:     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
 1126:     $Str .= '</td>';
 1127:     #
 1128:     # Render problem checkbox
 1129:     my $prob_checkbox = '<input type="checkbox" name="renderprob" ';
 1130:     if (exists($ENV{'form.renderprob'}) && $ENV{'form.renderprob'} eq 'true') {
 1131:         $prob_checkbox .= 'checked ';
 1132:     }
 1133:     $prob_checkbox .= 'value="true" />';
 1134:     #
 1135:     # Compute correct answers checkbox
 1136:     my $ans_checkbox = '<input type="checkbox" name="correctans" ';
 1137:     if (exists($ENV{'form.correctans'}) && $ENV{'form.correctans'} eq 'true') {
 1138:         $ans_checkbox .= 'checked ';
 1139:     }
 1140:     $ans_checkbox .= 'value="true" />';
 1141:     #
 1142:     # Show all submissions checkbox
 1143:     my $all_sub_checkbox = '<input type="checkbox" name="all_sub" ';
 1144:     if (exists($ENV{'form.all_sub'}) && 
 1145:         $ENV{'form.all_sub'} eq 'true') {
 1146:         $all_sub_checkbox .= 'checked ';
 1147:     }
 1148:     $all_sub_checkbox.= 'value="true" />';
 1149:     #
 1150:     # problem status checkbox
 1151:     my $prob_status_checkbox = '<input type="checkbox" name="prob_status" ';
 1152:     if (exists($ENV{'form.prob_status'}) && 
 1153:         $ENV{'form.prob_status'} eq 'true') {
 1154:         $prob_status_checkbox .= 'checked ';
 1155:     }
 1156:     $prob_status_checkbox .= 'value="true" />';
 1157:     #
 1158:     $Str .= '<td align="right" halign="top">'.
 1159:         '<label><b>'.
 1160:         &mt('Show problem [_1]',$prob_checkbox).'</b></label><br />'.
 1161:         '<label><b>'.
 1162:         &mt('Show correct answers [_1]',$ans_checkbox).'</b></label><br />'.
 1163:         '<label><b>'.
 1164:         &mt('Show all submissions [_1]',$all_sub_checkbox).
 1165:         '</b></label><br />'.
 1166:         '<label><b>'.
 1167:         &mt('Show problem grading [_1]',$prob_status_checkbox).
 1168:         '</b></label><br />'.
 1169:         '</td>';
 1170:     #
 1171:     $Str .= '</tr>'."\n";
 1172:     $Str .= '</table>'."\n";
 1173:     #
 1174:     $Str .= '<nobr>'.&mt('Status: [_1]',
 1175:                          '<input type="text" '.
 1176:                          'name="stats_status" size="60" value="" />').
 1177:             '</nobr>'.'</p>';    
 1178:     ##
 1179:     return $Str;
 1180: }
 1181: 
 1182: 1;
 1183: 
 1184: __END__

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