--- loncom/homework/essayresponse.pm 2007/04/17 23:25:09 1.82 +++ loncom/homework/essayresponse.pm 2010/08/29 19:36:37 1.112 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # essay (ungraded) style responses # -# $Id: essayresponse.pm,v 1.82 2007/04/17 23:25:09 albertel Exp $ +# $Id: essayresponse.pm,v 1.112 2010/08/29 19:36:37 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -29,9 +29,12 @@ package Apache::essayresponse; use strict; use Apache::lonxml(); +use Apache::lonhtmlcommon; +use Apache::loncommon; use Apache::lonnet; +use Apache::lonnavmaps; use Apache::lonlocal; -use LONCAPA; +use LONCAPA qw(:DEFAULT :match); BEGIN { @@ -51,55 +54,78 @@ sub start_essayresponse { my $coll= &HTML::Entities::encode($Apache::lonhomework::history{"resource.$part.$id.collaborators"},'<>&"'); my $uploadedfiletypes= &Apache::lonnet::EXT("resource.$part".'_'."$id.uploadedfiletypes"); $uploadedfiletypes=~s/[^\w\,]//g; - if ( $Apache::lonhomework::type eq 'survey' ) { - $result.= ' '; - } - $result.='
'; - if ( $Apache::lonhomework::type ne 'survey' ) { - $result.= ''; + &Apache::lonhtmlcommon::row_closure($closure); } if ($ncol > 0) { - $result .=''; + $result .= &Apache::lonhtmlcommon::row_closure(); } - $result.=&Apache::inputtags::file_selector($part,$id, - $uploadedfiletypes,'both'); - $result.='
'. + my $maxfilesize=&Apache::lonnet::EXT("resource.$part".'_'."$id.maxfilesize"); + if (!defined($maxfilesize)) { + $maxfilesize = 10.0; #FIXME This should become a domain configuration + } + if (($Apache::lonhomework::type eq 'survey') || + ($Apache::lonhomework::type eq 'surveycred') || + ($Apache::lonhomework::type eq 'anonsurvey') || + ($Apache::lonhomework::type eq 'anonsurveycred')) { + $result.= ''; + } + my $status_text = &mt('Submission type'); + if ($Apache::lonhomework::history{"resource.$part.award"} eq 'DRAFT') { + $status_text .= '
'.&mt('(Currently -- draft)'); + } + $result.= '

'.&Apache::lonhtmlcommon::start_pick_box(). + &Apache::lonhtmlcommon::row_title($status_text); + if (($Apache::lonhomework::type ne 'survey') && + ($Apache::lonhomework::type ne 'surveycred') && + ($Apache::lonhomework::type ne 'anonsurvey') && + ($Apache::lonhomework::type ne 'anonsurveycred')) { + my $closure; + unless ($ncol || $uploadedfiletypes) { + $closure = 1; + } + $result.= '
'. ''. - '

'.'
'; + $result.= &Apache::lonhtmlcommon::row_title(&mt('Collaborators')). + '
'; $result .= &check_collaborators($ncol,$coll) if ($coll =~ /\w+/); - $result .='
'; + my $filesfrom = 'both'; + my $stuname = &Apache::lonnet::EXT('user.name'); + my $studom = &Apache::lonnet::EXT('user.domain'); + if (!&Apache::lonnet::usertools_access($stuname,$studom,'portfolio')) { + $filesfrom = 'uploadonly'; + } + $result.=&Apache::inputtags::file_selector($part,$id,$uploadedfiletypes, + $filesfrom,undef,$maxfilesize); + $result.=&Apache::lonhtmlcommon::end_pick_box().'

'; } elsif ($target eq 'web' && $Apache::inputtags::status[-1] ne 'CAN_ANSWER') { my $part= $Apache::inputtags::part; my @msgs; if ($Apache::lonhomework::history{"resource.$part.$id.collaborators"} =~ /\S/) { my $coll= &HTML::Entities::encode($Apache::lonhomework::history{"resource.$part.$id.collaborators"},'<>&"'); - $result .= ''.&mt('Collaborated with [_1]',$coll).''; - } - - my $file_submission = - &Apache::inputtags::show_past_file_submission($part,$id); - if ($file_submission) { - $result .= ''.$file_submission.''; + $result .= ''.&mt('Collaborated with [_1]',$coll).''; } - my $port_submission = - &Apache::inputtags::show_past_portfile_submission($part,$id); - if ($port_submission) { - $result .= ''.$port_submission.''; - } + my $current_files_display = &Apache::inputtags::current_file_submissions($part,$id); + if ($current_files_display) { + $result .= ''.&mt('Submitted files:').'
'. + $current_files_display.''; + } if ($result ne '') { $result = @@ -117,30 +143,58 @@ sub end_essayresponse { my $increment = &Apache::response::repetition(); my $result; if ( $target eq 'grade' ) { - my $collaborators = $env{'form.HWCOL'.$part.'_'.$id}; - if ($collaborators =~ /[^\s]/) { - my $previous_list= &HTML::Entities::encode($Apache::lonhomework::history{"resource.$part.$id.collaborators"},'<>&"'); - $Apache::lonhomework::results{"resource.$part.$id.collaborators"}=$collaborators - if ($collaborators ne $previous_list); - } +# Deal with collaborators + my $collaborators = $env{'form.HWCOL'.$part.'_'.$id}; + my $previous_list= &HTML::Entities::encode($Apache::lonhomework::history{"resource.$part.$id.collaborators"},'<>&"'); + if ($collaborators ne $previous_list) { +# &Apache::lonnet::logthis("New collaborators [$collaborators] [$previous_list]"); + $Apache::lonhomework::results{"resource.$part.$id.collaborators"}=$collaborators; + } +# Scantron if ( &Apache::response::submitted('scantron') ) { $increment=&Apache::response::scored_response($part,$id); } elsif ( &Apache::response::submitted() ) { my $response = $env{'form.HWVAL_'.$id}; - my $filename= $env{'form.HWFILE'.$part.'_'.$id.'.filename'}; - my $portfiles = $env{'form.HWPORT'.$part.'_'.$id}; - if (( $response =~ /[^\s]/) || ($filename =~ /[^\s]/) || ($portfiles =~ /[^\s]/)) { + my $jspart=$part; + $jspart=~s/\./_/g; + my $filename = $env{'form.HWFILE'.$jspart.'_'.$id.'.filename'} || + $env{'form.HWFILETOOBIG'.$part.'_'.$id}; + my $portfiles = $env{'form.HWPORT'.$jspart.'_'.$id}; + my @deletions = &Apache::loncommon::get_env_multiple('form.HWFILE'.$jspart.'_'.$id.'_delete'); + my ($is_submit,$was_draft); + if ($env{'form.HWDRAFT'.$part.'_'.$id} eq 'yes') { + $is_submit = 1; + } + if ($Apache::lonhomework::history{"resource.$part.award"} eq 'DRAFT') { + $was_draft = 1; + } + if (($response =~ /[^\s]/) || ($filename =~ /[^\s]/) || ($portfiles =~ /[^\s]/) || + (@deletions > 0) || ($was_draft && $is_submit)) { my $award='DRAFT'; if ($env{'form.HWDRAFT'.$part.'_'.$id} eq 'yes') { - $award='SUBMITTED'; + if ($Apache::lonhomework::type eq 'anonsurvey') { + $award='ANONYMOUS'; + } elsif ($Apache::lonhomework::type eq 'anonsurveycred') { + $award='ANONYMOUS_CREDIT'; + } elsif ($Apache::lonhomework::type eq 'surveycred') { + $award='SUBMITTED_CREDIT'; + } else { + $award='SUBMITTED'; + } } my $uploadedflag=0; - &file_submission($part,$id,'filename',\$award,\$uploadedflag); - &file_submission($part,$id,'portfiles',\$award,\$uploadedflag); + my $totalsize=0; + &file_submission($part,$id,\$award,\$uploadedflag,\$totalsize,\@deletions); $Apache::lonhomework::results{"resource.$part.$id.submission"}=$response; $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$award; my %previous=&Apache::response::check_for_previous($response,$part,$id); - unless ($uploadedflag) { &Apache::response::handle_previous(\%previous,$award); } + if ($uploadedflag) { + if ($award eq 'FILENAME_INUSE') { + delete($Apache::lonhomework::results{"resource.$id.tries"}); + } + } else { + &Apache::response::handle_previous(\%previous,$award); + } # # Store with resource author for similarity testing # @@ -148,7 +202,8 @@ sub end_essayresponse { my ($symb,$crsid,$domain,$name)= &Apache::lonnet::whichuser(); if ($crsid) { - my $akey=$name.'.'.$domain.'.'.$crsid; + my $akey=join('.',&escape($name),&escape($domain), + &escape($crsid)); my $essayurl= &Apache::lonnet::declutter($ENV{'REQUEST_URI'}); my ($adom,$aname,$apath)= @@ -159,7 +214,7 @@ sub end_essayresponse { { $akey => $response },$adom,$aname); } } - } + } } } elsif ($target eq 'edit') { $result.=&Apache::edit::end_table(); @@ -183,7 +238,13 @@ sub end_essayresponse { if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze') { - &Apache::lonxml::increment_counter($increment); + &Apache::lonxml::increment_counter($increment, "$part.$id"); + + if ($target eq 'analyze') { + $Apache::lonhomework::analyze{"$part.$id.type"} = 'essayresponse'; + push (@{ $Apache::lonhomework::analyze{"parts"} },"$part.$id"); + &Apache::lonhomework::set_bubble_lines(); + } } &Apache::response::end_response; @@ -221,57 +282,264 @@ sub format_prior_response { } sub file_submission { - my ($part,$id,$which,$award,$uploadedflag)=@_; + my ($part,$id,$award,$uploadedflag,$totalsize,$deletions)=@_; my $files; my $jspart=$part; $jspart=~s/\./_/g; - if ($which eq 'portfiles') { $files= $env{'form.HWPORT'.$jspart.'_'.$id}; } - if ($which eq 'filename') { - $files = $env{'form.HWFILE'.$jspart.'_'.$id.'.filename'}; + my ($symb,$crsid,$udom,$uname) = &Apache::lonnet::whichuser(); + my %crsinfo = &Apache::lonnet::coursedescription($crsid); + my $cdom = $crsinfo{'domain'}; + my $cnum = $crsinfo{'num'}; + my (@portfiles,$uploadedurl,@submitted_portfiles,$submitted_upload, + @acceptable_portfiles,$acceptable_upload,@accepted_portfiles, + $accepted_upload,@savedportfiles,$stored_upload,@tolock, + %port_delete,$uploaded_delete); + if ($Apache::lonhomework::history{"resource.$part.$id.portfiles"} || + $Apache::lonhomework::history{"resource.$part.$id.uploadedurl"}) { + if ($Apache::lonhomework::history{"resource.$part.$id.portfiles"}) { + @portfiles = split(/,/,$Apache::lonhomework::history{"resource.$part.$id.portfiles"}); + } + $uploadedurl = $Apache::lonhomework::history{"resource.$part.$id.uploadedurl"}; + if (ref($deletions) eq 'ARRAY') { + if (@{$deletions} > 0) { + foreach my $file (@{$deletions}) { + $file = &HTML::Entities::decode($file); + if (grep(/^\Q$file\E$/,@portfiles)) { + $port_delete{$file} = 1; + } elsif ($file =~ m{^/uploaded/\Q$udom\E/\Q$uname\E/essayresponse/\Q$cdom\E/\Q$cnum\E/}) { + $uploaded_delete = $file; + } elsif ($file =~ m{^/uploaded/\Q$udom\E/\Q$uname\E/essayresponse/[^/]+$}) { + $uploaded_delete = $file; + } + } + } + } + foreach my $current (@portfiles) { + unless ($port_delete{$current}) { + push(@savedportfiles,$current); + } + } + if ($uploaded_delete) { + if ($uploaded_delete eq $uploadedurl) { + $Apache::lonhomework::results{"resource.$part.$id.uploadedfile"} = ""; + $Apache::lonhomework::results{"resource.$part.$id.uploadedurl"} = ""; + } else { + undef($uploaded_delete); + } + } + } + if ($env{'form.HWPORT'.$jspart.'_'.$id} ne '') { + my $newfiles= $env{'form.HWPORT'.$jspart.'_'.$id}; + $newfiles =~s/,$//; + if ($newfiles =~ /[^\s]/) { + foreach my $file (split(/\s*,\s*/,$newfiles)) { + if ($file =~ /[^\s]/) { + push(@submitted_portfiles,$file); + } + } + } } - - if ($files =~ /[^\s]/) { - $files =~s/,$//; - $Apache::lonhomework::results{"resource.$part.$id.$which"}=$files; - - my @submitted_files = ($files); - if ( $which eq 'portfiles' ) { - @submitted_files = split(/\s*,\s*/,$files); - } + if ($env{'form.HWFILETOOBIG'.$part.'_'.$id} ne '') { + $$award = 'EXCESS_FILESIZE'; + } elsif ($env{'form.HWFILE'.$jspart.'_'.$id.'.filename'} ne '') { + my $newfile = $env{'form.HWFILE'.$jspart.'_'.$id.'.filename'}; + if ($newfile =~ /[^\s]/) { + $submitted_upload = $newfile; + } + } + if (@savedportfiles) { + foreach my $file (reverse(@savedportfiles)) { + unless(grep(/^\Q$file\E$/,@submitted_portfiles)) { + unshift(@submitted_portfiles,$file); + } + } + } + if (@submitted_portfiles || $submitted_upload) { + my $uploadedfiletypes= + &Apache::lonnet::EXT("resource.$part".'_'."$id.uploadedfiletypes"); + if ($uploadedfiletypes ne '') { + $uploadedfiletypes=~s/[^\w\,]//g; + $uploadedfiletypes=','.$uploadedfiletypes.','; + if (@submitted_portfiles) { + foreach my $file (@submitted_portfiles) { + my ($extension)=($file=~/\.(\w+)$/); + if ($uploadedfiletypes=~/\,\s*\Q$extension\E\s*\,/i) { + push(@acceptable_portfiles,$file); + } + } + } + if ($submitted_upload) { + my ($upload_ext)=($submitted_upload=~/\.(\w+)$/); + if ($uploadedfiletypes=~/\,\s*\Q$upload_ext\E\s*\,/i) { + $acceptable_upload = $submitted_upload; + } else { + $$award='INVALID_FILETYPE'; + &delete_form_items($jspart,$id); + } + } + } else { + @acceptable_portfiles = @submitted_portfiles; + $acceptable_upload = $submitted_upload; + } + } + if ((@acceptable_portfiles) || ($acceptable_upload ne '')) { + my $maxfilesize=&Apache::lonnet::EXT("resource.$part".'_'."$id.maxfilesize"); + if (!$maxfilesize) { + $maxfilesize = 10.0; #FIXME This should become a domain configuration + } + my %dirlist; + if (@acceptable_portfiles) { + foreach my $file (@acceptable_portfiles) { + my ($path,$filename) = ($file =~ m{^(.*/)([^/]+)$}); + my $fullpath = '/userfiles/portfolio'.$path; + if (!exists($dirlist{$fullpath})) { + my @list = &Apache::lonnet::dirlist($fullpath,$udom,$uname,1); + $dirlist{$fullpath} = \@list; + } + if (ref($dirlist{$fullpath}) eq 'ARRAY') { + foreach my $dir_line (@{$dirlist{$fullpath}}) { + my ($fname,$dom,undef,$testdir,undef,undef,undef,undef, + $size,undef,$mtime,undef,undef,undef,$obs,undef) = + split(/\&/,$dir_line,16); + if ($filename eq $fname) { + my $mbsize = $size/(1024.0*1024.0); + if (ref($totalsize)) { + $$totalsize += $mbsize; + } + last; + } + } + } + if (ref($totalsize)) { + if ($$totalsize > $maxfilesize) { + $$award='EXCESS_FILESIZE'; + &delete_form_items($jspart,$id); + } else { + push(@accepted_portfiles,$file); + } + } else { + push(@accepted_portfiles,$file); + } + } + } + if ($acceptable_upload ne '') { + if (ref($totalsize)) { + $$totalsize += $env{'form.HWFILESIZE'.$jspart.'_'.$id}; + if ($$totalsize > $maxfilesize) { + $$award='EXCESS_FILESIZE'; + delete($env{'form.HWFILE'.$jspart.'_'.$id}); + } else { + $accepted_upload = $acceptable_upload; + } + } else { + $accepted_upload = $acceptable_upload; + } + } + } + if ($accepted_upload ne '') { + my ($map,$resid,$resurl)=&Apache::lonnet::decode_symb($symb); + my $turnindir; + my %userhash = &Apache::lonnet::userenvironment($udom,$uname,'turnindir'); + $turnindir = $userhash{'turnindir'}; + if ($turnindir eq '') { + $turnindir = &mt('turned in'); + $turnindir =~ s/\W+/_/g; + my %newhash = ( + 'turnindir' => $turnindir, + ); + &Apache::lonnet::put('environment',\%newhash,$udom,$uname); + } + my $prefix = 'portfolio'; + my $path = '/'.$turnindir.'/'; + my $restitle=&Apache::lonnet::gettitle($symb); + $restitle =~ s/\W+/_/g; + if ($restitle eq '') { + $restitle = ($resurl =~ m{/[^/]+$}); + if ($restitle eq '') { + $restitle = time; + } + } + my @pathitems; + my $navmap = Apache::lonnavmaps::navmap->new(); + if (defined($navmap)) { + my $mapres = $navmap->getResourceByUrl($map); + if (ref($mapres)) { + my $pcslist = $mapres->map_hierarchy(); + if ($pcslist ne '') { + foreach my $pc (split(/,/,$pcslist)) { + my $res = $navmap->getByMapPc($pc); + if (ref($res)) { + my $title = $res->compTitle(); + $title =~ s/\W+/_/g; + if ($title ne '') { + push(@pathitems,$title); + } + } + } + } + my $maptitle = $mapres->compTitle(); + $maptitle =~ s/\W+/_/g; + if ($maptitle ne '') { + push(@pathitems,$maptitle); + } + } else { + $$award = 'INTERNAL_ERROR'; + } + } else { + $$award = 'INTERNAL_ERROR'; + } + push(@pathitems,$restitle); + $path .= join('/',@pathitems); + my $formelement = 'HWFILE'.$jspart.'_'.$id; + my $fname = &Apache::lonnet::clean_filename($env{'form.'.$formelement.'.filename'}); + my $url = '/uploaded/'.$udom.'/'.$uname.'/'.$prefix.$path.'/'.$fname; + my @stat = &Apache::lonnet::stat_file($url); + if (@stat && $stat[0] ne 'no_such_dir') { + $$award = 'FILENAME_INUSE'; + } else { + my ($mode,%allfiles,%codebase); + my $result = &Apache::lonnet::userfileupload($formelement,'', + $prefix.$path,$mode,\%allfiles,\%codebase); + if ($result =~ m{^/uploaded/}) { + $stored_upload = $path.'/'.$fname; + $Apache::lonhomework::results{"resource.$part.$id.portfiles"} = $stored_upload; + push(@tolock,$stored_upload); + } else { + $$award = 'INTERNAL_ERROR'; + } + } + delete($env{'form.HWFILE'.$jspart.'_'.$id}); + } + if (@accepted_portfiles) { + if ($stored_upload) { + $Apache::lonhomework::results{"resource.$part.$id.portfiles"} .= ','; + } + $Apache::lonhomework::results{"resource.$part.$id.portfiles"}.=join(',',@accepted_portfiles); + push(@tolock,@accepted_portfiles); + } + if (!defined($Apache::lonhomework::results{"resource.$part.$id.portfiles"})) { + if (keys(%port_delete) > 0) { + $Apache::lonhomework::results{"resource.$part.$id.portfiles"} = ""; + } + } + if (($Apache::lonhomework::history{"resource.$part.$id.portfiles"} ne + $Apache::lonhomework::results{"resource.$part.$id.portfiles"}) || + ($uploaded_delete)) { + if (ref($uploadedflag)) { + $$uploadedflag=1; + } + } + &Apache::lonnet::unmark_as_readonly($udom,$uname,[$symb,$crsid]); + &Apache::lonnet::mark_as_readonly($udom,$uname,[@tolock],[$symb,$crsid]); + &Apache::lonnet::clear_selected_files($uname); + return; +} - my $uploadedfiletypes= &Apache::lonnet::EXT("resource.$part".'_'."$id.uploadedfiletypes"); - if ($uploadedfiletypes) { - $uploadedfiletypes=~s/[^\w\,]//g; - $uploadedfiletypes=','.$uploadedfiletypes.','; - foreach my $file (@submitted_files) { - my ($extension)=($file=~/\.(\w+)$/); - unless ($uploadedfiletypes=~/\,$extension\,/i) { - $$award='INVALID_FILETYPE'; - } - } - } - if ($$award ne 'INVALID_FILETYPE' && ref($uploadedflag)) { - $$uploadedflag=1; - } - if ($$award ne 'INVALID_FILETYPE' && $which eq 'portfiles') { - my ($symb,$crsid,$domain,$name)=&Apache::lonnet::whichuser(); - &Apache::lonnet::unmark_as_readonly($domain,$name,[$symb,$crsid]); - &Apache::lonnet::mark_as_readonly($domain,$name,\@submitted_files,[$symb,$crsid]); - &Apache::lonnet::clear_selected_files($name); - } - if ($$award ne 'INVALID_FILETYPE' && $which eq 'filename') { - $Apache::lonhomework::results{"resource.$part.$id.uploadedfile"}= - $files; - $Apache::lonhomework::results{"resource.$part.$id.uploadedurl"}= - &Apache::lonnet::userfileupload('HWFILE'.$jspart.'_'.$id,undef, - 'essayresponse'); - } - } elsif ($which eq 'portfiles' && - $Apache::lonhomework::history{"resource.$part.$id.$which"}) { - my ($symb,$crsid,$domain,$name)=&Apache::lonnet::whichuser(); - &Apache::lonnet::unmark_as_readonly($domain,$name,[$symb,$crsid]); - $Apache::lonhomework::results{"resource.$part.$id.$which"}=""; - } +sub delete_form_items { + my ($jspart,$id) = @_; + delete($env{'form.HWFILE'.$jspart.'_'.$id.'.filename'}); + delete($env{'form.HWFILE'.$jspart.'_'.$id.'.mimetype'}); + delete($env{'form.HWFILE'.$jspart.'_'.$id}); } sub check_collaborators { @@ -280,30 +548,80 @@ sub check_collaborators { $env{'course.'.$env{'request.course.id'}.'.domain'}, $env{'course.'.$env{'request.course.id'}.'.num'}); my (@badcollaborators,$result); - my (@collaborators) = split(/\,?\s+/,$coll); - foreach (@collaborators) { - my $collaborator = $_; - if (/@/) { - $collaborator =~ s/@/:/; + + my (@collaborators) = split(/[,;\s]+/,$coll); + foreach my $entry (@collaborators) { + my $collaborator; + if ($entry =~ /:/) { + $collaborator = $entry; } else { - $collaborator = $_.':'.$env{'user.domain'}; + $collaborator = $entry.':'.$env{'user.domain'}; } - push @badcollaborators, $_ if (!grep /^$collaborator/i,keys %classlist); + if ($collaborator !~ /^$match_username:$match_domain$/) { + if (!grep(/^\Q$entry\E$/,@badcollaborators)) { + push(@badcollaborators,$entry); + } + } elsif (!grep(/^\Q$collaborator\E$/i,keys(%classlist))) { + if (!grep(/^\Q$entry\E$/,@badcollaborators)) { + push(@badcollaborators,$entry); + } + } } - if (scalar(@badcollaborators)) { - $result = '
The following user'. - (scalar(@badcollaborators) > 1 ? 's are' : ' is').' invalid: '. - join(', ',@badcollaborators).'. Please correct.
'; + my $numbad = scalar(@badcollaborators); + if ($numbad) { + $result = '
'; + if ($numbad == 1) { + $result .= &mt('The following user is invalid:'); + } else { + $result .= &mt('The following [_1] users are invalid:',$numbad); + } + $result .= ' '.join(', ',@badcollaborators).'. '.&mt('Please correct.'). + '
'; } my $toomany = scalar(@collaborators) - $ncol; if ($toomany > 0) { $result .= '
'. - 'You have too many collaborators. Please remove '.$toomany.' collaborator'. - ($toomany > 1 ? 's' :'').'.
'; + &mt('You have too many collaborators.').' '. + &mt('Please remove [quant,_1,collaborator].',$toomany). + ''; } return $result; } 1; __END__ + + +=pod + +=head1 NAME + +Apache::essayresponse + +=head1 SYNOPSIS + +Handler to evaluate essay (ungraded) style responses. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 SUBROUTINES + +=over + +=item start_essayresponse() + +=item end_essayresponse() + +=item format_prior_response() + +=item file_submission() + +=item delete_form_items() + +=item check_collaborators() + +=back + +=cut