[LON-CAPA-cvs] cvs: loncom /homework externalresponse.pm

kruse kruse at source.lon-capa.org
Thu Aug 22 03:39:16 EDT 2013


kruse		Thu Aug 22 07:39:16 2013 EDT

  Modified files:              
    /loncom/homework	externalresponse.pm 
  Log:
  WORK IN PROGRESS, extending functions of external response by allowing files to be uploaded and graded externally.
  
  
-------------- next part --------------
Index: loncom/homework/externalresponse.pm
diff -u loncom/homework/externalresponse.pm:1.19 loncom/homework/externalresponse.pm:1.20
--- loncom/homework/externalresponse.pm:1.19	Fri Apr 29 00:32:08 2011
+++ loncom/homework/externalresponse.pm	Thu Aug 22 07:39:15 2013
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # external style responses
 #
-# $Id: externalresponse.pm,v 1.19 2011/04/29 00:32:08 www Exp $
+# $Id: externalresponse.pm,v 1.20 2013/08/22 07:39:15 kruse Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,6 +34,11 @@
 use Apache::loncapagrade;
 use Apache::lonnet;
 use Apache::lonlocal;
+use Apache::lonxml();
+use Apache::lonhtmlcommon;
+use Apache::loncommon;
+use Apache::lonnavmaps;
+use LONCAPA qw(:DEFAULT :match);
 
 BEGIN {
     &Apache::lonxml::register('Apache::externalresponse',('externalresponse'));
@@ -53,7 +58,6 @@
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     my $id = &Apache::response::start_response($parstack,$safeeval);
-
     if ($target eq 'edit') {
   	$result .=&Apache::edit::tag_start($target,$token);
 	$result .=&Apache::edit::text_arg('URL:','url',$token,60).'<br />';
@@ -71,7 +75,98 @@
     } elsif ($target eq 'meta') {
   	$result=&Apache::response::meta_package_write('externalresponse');
     }
-    
+    elsif ($target eq 'web' &&
+        $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+        my $part= $Apache::inputtags::part;
+        my $ncol= &Apache::lonnet::EXT("resource.$part".'_'."$id.maxcollaborators");
+        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;
+        my $maxfilesize=&Apache::lonnet::EXT("resource.$part".'_'."$id.maxfilesize");
+        if (!defined($maxfilesize)) {
+            $maxfilesize = 10.0; #FIXME This should become a domain configuration 
+        }
+            if($uploadedfiletypes){
+            my $hiddendraft;
+                if (($Apache::lonhomework::type eq 'survey') ||
+                    ($Apache::lonhomework::type eq 'surveycred') ||
+                    ($Apache::lonhomework::type eq 'anonsurvey') ||
+                    ($Apache::lonhomework::type eq 'anonsurveycred')) {
+                    $hiddendraft = '<input type="hidden" name="HWDRAFT'.$part.'_'.$id.'" value="yes" />';
+                } else {
+                    my $status_text = &mt('Submission type');
+                    if ($Apache::lonhomework::history{"resource.$part.award"} eq 'DRAFT') {
+                        $status_text .= '<br />'.&mt('(Currently -- draft)');
+                    }
+                    $result = &Apache::lonhtmlcommon::row_title($status_text);
+                    my $closure;
+                    unless ($ncol || $uploadedfiletypes) {
+                        $closure = 1;
+                    }
+                    $result.=
+                        '<label>'.
+                        '<input type="radio" name="HWDRAFT'.$part.'_'.$id.'" value="yes" checked="checked" /> '.
+                        &mt('Submit entries below as answer to receive credit').
+                        '</label> <br />'.
+                        '<label>'.
+                        '<input type="radio" name="HWDRAFT'.$part.'_'.$id.'" value="no" /> '.
+                        &mt('Save entries below (not submitted for credit yet)').
+                        '</label>'.
+                        &Apache::lonhtmlcommon::row_closure($closure);
+                }
+
+                if ($ncol > 0) {
+                    $result.= &Apache::lonhtmlcommon::row_title(&mt('Collaborators')).
+                          '<label>'.
+                          &mt('Collaborators:').' <input type="text" size="70" max="80" name="HWCOL'.
+                          $part.'_'.$id.'" value="'.$coll.'" /><br />'.
+                          &mt('Enter a maximum of [quant,_1,collaborator] using username or username:domain, e.g. smithje or smithje:[_2].',$ncol,$env{'user.domain'});
+                    if ($ncol > 1) {
+                        $result .= '<br />'.&mt('If entering more than one, use spaces to separate the collaborators.');
+	            }
+                    $result .= '</label><br />';
+                    $result .= &check_collaborators($ncol,$coll) if ($coll =~ /\w+/);
+                    $result .= &Apache::lonhtmlcommon::row_closure();
+                }
+                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);
+                if ($result) {
+                    $result =
+                        '<div>'.$hiddendraft.
+                        &Apache::lonhtmlcommon::start_pick_box().
+                        $result.
+                        &Apache::lonhtmlcommon::end_pick_box().'</div>';
+                } else {
+                    $result = $hiddendraft;
+                }
+        }
+    } elsif ($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"},'<>&"');
+            $result .= '<td><i>'.&mt('Collaborated with [_1]',$coll).'</i></td>';
+        }
+
+        my $current_files_display = &Apache::inputtags::current_file_submissions($part,$id);
+        if ($current_files_display) {
+            $result .= '<td><b>'.&mt('Submitted files:').'</b><br />'.
+                       $current_files_display.'</td>';
+        }
+
+        if ($result ne '') {
+            $result =
+                '<table class="LC_pastsubmission"><tr>'.$result.
+                '</tr></table>';
+        }
+    } 
     return $result;
 }
 
@@ -82,11 +177,20 @@
     my $id = $Apache::inputtags::response['-1'];
     my $increment     = 1;
     if ($target eq 'grade') {
+        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;
+        }
 	if (  &Apache::response::submitted('scantron') ) {
 	    my $increment=&Apache::response::scored_response($part,$id);
 	} elsif ( &Apache::response::submitted() ) {
 	    my $response = &Apache::response::getresponse();
-	    if ( $response =~ /[^\s]/) {
+            my $files = $Apache::lonhomework::history{"resource.$part.$id.portfiles"};
+            $files .=   $Apache::lonhomework::history{"resource.$part.$id.uploadedurl"};
+#           &Apache::lonnet::logthis("Submitted Files : ". $files);
+	    if (( $response =~ /[^\s]/) || $files) {
 		my $url = &Apache::lonxml::get_param('url',$parstack,$safeeval);
 		my $answer = &Apache::lonxml::get_param('answer',$parstack,$safeeval);
 		my %form = &Apache::lonxml::get_param_var('form',$parstack,$safeeval);
@@ -94,8 +198,13 @@
 		$form{'LONCAPA_correct_answer'}=$answer;
 		$form{'LONCAPA_language'}=
 		    &Apache::lonnet::metadata($ENV{'REQUEST_URI'},'language');
+                $form{'LONCAPA_student_submitted_files'} = $files;
 		&Apache::lonxml::debug("Asking $url, with:");
 		&Apache::lonhomework::showhash(%form);
+                my $udom = &Apache::lonnet::EXT('user.domain');
+                my $uname = &Apache::lonnet::EXT('user.name');
+                my $symb = $env{'resource.symb'};
+                my %record = &Apache::lonnet::restore($symb,$env{'request.course.id'},$udom,$uname);
 		my $ua = LWP::UserAgent->new;
 		my $res = $ua->request(POST $url, \%form);
 		my %previous = &Apache::response::check_for_previous($response,
@@ -129,9 +238,67 @@
 		&Apache::lonxml::debug("results of");
 		&Apache::lonhomework::showhash(%Apache::lonhomework::results);
 	    }
-	}
+            my $response      = $env{'form.HWVAL_'.$id};
+            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') {
+                    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;
+                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,$id);
+                if ($uploadedflag) {
+                    if ($award eq 'FILENAME_INUSE') {
+                        delete($Apache::lonhomework::results{"resource.$id.tries"});
+                    }
+                } else {
+                    &Apache::response::handle_previous(\%previous,$award);
+                }
+                if ($award eq 'SUBMITTED') {
+                    my ($symb,$crsid,$domain,$name)=
+                        &Apache::lonnet::whichuser();
+                    if ($crsid) {
+                        my $akey=join('.',&escape($name),&escape($domain),
+                                      &escape($crsid));
+                        my $essayurl=
+                            &Apache::lonnet::declutter($ENV{'REQUEST_URI'});
+                        my ($adom,$aname,$apath)=
+                            ($essayurl=~/^($LONCAPA::domain_re)\/($LONCAPA::username_re)\/(.*)$/);
+                        $apath=&escape($apath);
+                        $apath=~s/\W/\_/gs;
+                        &Apache::lonnet::put('nohist_essay_'.$apath,
+                                         { $akey => $response },$adom,$aname);
+                    }
+                }
+            }
+        }
     }
-    if ($target eq 'web') {
+    if ($target eq 'web')  {
 	&Apache::response::setup_prior_tries_hash(\&format_prior_response);
         if (&Apache::response::show_answer()) {
            $result.='<table border="1"><tr><th>'.&mt('Your answer:').'</th></tr><tr><td><pre>'.
@@ -154,16 +321,363 @@
 	    &Apache::lonhomework::set_bubble_lines();
 	}
     }
+    elsif ($target eq 'edit') {
+        $result.=&Apache::edit::end_table();
+
+    } elsif ($target eq 'tex'
+             && $Apache::lonhomework::type eq 'exam') {
+        $result .= &Apache::inputtags::exam_score_line($target);
+
+    } elsif ($target eq 'answer') {
+        $result.=&Apache::response::answer_header($$tagstack[-1]);
+        my $answer = &mt('Essay will be hand graded.');
+        $result.=&Apache::response::answer_part($$tagstack[-1],$answer,
+                                                {'no_verbatim' => 1});
+        $result.=&Apache::response::answer_footer($$tagstack[-1]);
+    }
+    if ($target eq 'web') {
+        &Apache::response::setup_prior_tries_hash(\&format_prior_response,
+                                                  ['portfiles',
+                                                   'uploadedurl']);
+    }
+
+    if (($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
+        $target eq 'tex' || $target eq 'analyze'))  {
+        &Apache::lonxml::increment_counter($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();
     return $result;
 }
 
 sub format_prior_response {
-    my ($mode,$answer) =@_;
-    return '<span class="LC_prior_external">'.
-	    &HTML::Entities::encode($answer,'"<>&').'</span>';
+   
+   
+    	my ($mode,$answer,$other_data) = @_;
+   	 my $output;
+
+   	 my (undef,undef,$udom,$uname) = &Apache::lonnet::whichuser();
+   	 my $port_url = '/uploaded/'.$udom.'/'.$uname.'/portfolio/';
+
+   	 my $file_list;
+
+   	 foreach my $file (split(/\s*,\s*/,
+			    $other_data->[0].','.$other_data->[1])) {
+		next if ($file!~/\S/);
+		if ($file !~ m{^/uploaded/}) { $file=$port_url.$file; }
+		$file=~s|/+|/|g;
+		&Apache::lonnet::allowuploaded('/adm/essayresponse',$file);
+		$file_list.='<li><span class="LC_nobreak"><a href="'.$file.'?rawmode=1" target="lonGRDs"><img src="'.&Apache::loncommon::icon($file).'" alt="file icon" border="0" /> '.$file.'</a></span></li>'."\n";
+   	 }
+   	 if ($file_list) {
+		$output.= &mt('Submitted Files').'<ul>'.$file_list.'</ul>';
+   	 }
+   	 if ($answer =~ /\S/) {
+		$output.='<p>'.&mt('Submitted text').'<blockquote>'.$answer.'</blockquote></p>';
+   	 }
+
+   	 return '<div class="LC_prior_essay">'.$output.'</div>';
+    }
+
+
+
+sub file_submission {
+    my ($part,$id,$award,$uploadedflag,$totalsize,$deletions)=@_;
+    my $files;
+    my $jspart=$part;
+    $jspart=~s/\./_/g;
+    my ($symb,$crsid,$udom,$uname) = &Apache::lonnet::whichuser();
+    my %crsinfo = &Apache::lonnet::coursedescription($crsid);
+    my $cdom = $crsinfo{'domain'};
+    my $cnum = $crsinfo{'num'};
+    my (@portfiles,$uploadedurl, at submitted_portfiles,$submitted_upload,
+        @acceptable_portfiles,$acceptable_upload, at accepted_portfiles,
+        $accepted_upload, at savedportfiles,$stored_upload, at 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$file\E$/, at 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 ($env{'form.HWFILETOOBIG'.$part.'_'.$id} ne '') {
+        $$award = 'EXCESS_FILESIZE';
+    } elsif ($env{'form.HWFILE'.$jspart.'_'.$id.'.filename'} ne '') {
+        my $newfile = $env{'form.HWFILE'.$jspart.'_'.$id.'.filename'};
+        if ($newfile =~ /[^\s]/) {
+            $submitted_upload = $newfile;
+        }
+    }
+    if (@savedportfiles) {
+        foreach my $file (reverse(@savedportfiles)) {
+            unless(grep(/^\Q$file\E$/, at submitted_portfiles)) {
+                unshift(@submitted_portfiles,$file);
+            }
+        }
+    }
+    if (@submitted_portfiles || $submitted_upload) {
+        my $uploadedfiletypes=
+            &Apache::lonnet::EXT("resource.$part".'_'."$id.uploadedfiletypes");
+        if ($uploadedfiletypes ne '') {
+            $uploadedfiletypes=~s/[^\w\,]//g;
+            $uploadedfiletypes=','.$uploadedfiletypes.',';
+            if (@submitted_portfiles) {
+                foreach my $file (@submitted_portfiles) {
+                    my ($extension)=($file=~/\.(\w+)$/);
+                    if ($uploadedfiletypes=~/\,\s*\Q$extension\E\s*\,/i) {
+                        push(@acceptable_portfiles,$file);
+                    }
+                }
+            }
+            if ($submitted_upload) {
+                my ($upload_ext)=($submitted_upload=~/\.(\w+)$/);
+                if ($uploadedfiletypes=~/\,\s*\Q$upload_ext\E\s*\,/i) {
+                    $acceptable_upload = $submitted_upload;
+                } else {
+                    $$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 ($listref,$listerror) =
+                        &Apache::lonnet::dirlist($fullpath,$udom,$uname,1);
+                    if (ref($listref) eq 'ARRAY') {
+                        $dirlist{$fullpath} = $listref;
+                    }
+                }
+                if (ref($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 ($path,$multiresp) = 
+            &Apache::loncommon::get_turnedin_filepath($symb,$uname,$udom,
+                                                      'submission');
+        if ($path eq '') {
+            $$award = 'INTERNAL_ERROR';
+        } else {
+            if ($multiresp) {
+                $path .= '/'.$jspart.'_'.$id;
+            }
+            my $prefix = 'portfolio';
+            my $formelement = 'HWFILE'.$jspart.'_'.$id;
+            my $fname = &Apache::lonnet::clean_filename($env{'form.'.$formelement.'.filename'});
+            my $url = '/uploaded/'.$udom.'/'.$uname.'/'.$prefix.$path.'/'.$fname;
+            my @stat = &Apache::lonnet::stat_file($url);
+            my $conflicts = 0;
+            if (@stat && $stat[0] ne 'no_such_dir') {
+                my $current_permissions = 
+                    &Apache::lonnet::get_portfile_permissions($udom,$uname);
+                if (ref($current_permissions) eq 'HASH') {
+                    if (ref($current_permissions->{$path.'/'.$fname}) eq 'ARRAY') {
+                        foreach my $record (@{$current_permissions->{$path.'/'.$fname}}) {
+                            if (ref($record) eq 'ARRAY') {
+                                next if (($record->[0] eq $symb) && 
+                                         ($record->[1] eq $crsid));
+                                $conflicts ++;
+                            } 
+                        }
+                    }
+                }
+                if ($conflicts) {
+                    $$award = 'FILENAME_INUSE';
+                }
+            }
+            unless ($conflicts) { 
+                my ($mode,%allfiles,%codebase);
+                my $result = &Apache::lonnet::userfileupload($formelement,'',
+                             $prefix.$path,$mode,\%allfiles,\%codebase);
+                if ($result =~ m{^/uploaded/}) {
+                    $stored_upload = $path.'/'.$fname;
+                    unless (grep(/^\Q$stored_upload\E$/, at accepted_portfiles)) {
+                        $Apache::lonhomework::results{"resource.$part.$id.portfiles"} = $stored_upload;
+                        push(@tolock,$stored_upload);
+                    }
+                } else {
+                    $$award = 'INTERNAL_ERROR';
+                }
+            }
+        }
+        delete($env{'form.HWFILE'.$jspart.'_'.$id});
+    }
+    if (@accepted_portfiles) {
+        if ($Apache::lonhomework::results{"resource.$part.$id.portfiles"}) {
+            $Apache::lonhomework::results{"resource.$part.$id.portfiles"} .= ',';
+        }
+        $Apache::lonhomework::results{"resource.$part.$id.portfiles"}.=join(',', at accepted_portfiles);
+        push(@tolock, at accepted_portfiles);
+    }
+    if (!defined($Apache::lonhomework::results{"resource.$part.$id.portfiles"})) {
+        if (keys(%port_delete) > 0) {
+            $Apache::lonhomework::results{"resource.$part.$id.portfiles"} = "";
+        }
+    }
+    if (($Apache::lonhomework::history{"resource.$part.$id.portfiles"} ne  
+         $Apache::lonhomework::results{"resource.$part.$id.portfiles"}) ||
+        ($uploaded_delete)) {
+        if (ref($uploadedflag)) {
+            $$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($uname);
+    return;
+}
+
+sub delete_form_items {
+    my ($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 {
+    my ($ncol,$coll) = @_;
+    my %classlist=&Apache::lonnet::dump('classlist',
+					$env{'course.'.$env{'request.course.id'}.'.domain'},
+					$env{'course.'.$env{'request.course.id'}.'.num'});
+    my (@badcollaborators,$result);
+  
+    my (@collaborators) = split(/[,;\s]+/,$coll);
+    foreach my $entry (@collaborators) {
+        my $collaborator;
+	if ($entry =~ /:/) {
+	    $collaborator = $entry;
+	} else {
+	    $collaborator = $entry.':'.$env{'user.domain'};
+	}
+        if ($collaborator !~ /^$match_username:$match_domain$/) {
+            if (!grep(/^\Q$entry\E$/, at badcollaborators)) {
+	        push(@badcollaborators,$entry);
+            }
+        } elsif (!grep(/^\Q$collaborator\E$/i,keys(%classlist))) {
+            if (!grep(/^\Q$entry\E$/, at badcollaborators)) {
+                push(@badcollaborators,$entry);
+            }
+        }
+    }
+    
+    my $numbad = scalar(@badcollaborators);
+    if ($numbad) {
+	$result = '<table border="0"><tr bgcolor="#ffbbbb"><td>';
+        if ($numbad == 1) {
+            $result .= &mt('The following user is invalid:');
+        } else {
+            $result .= &mt('The following [_1] users are invalid:',$numbad);
+        }
+	$result .= ' '.join(', ', at badcollaborators).'. '.&mt('Please correct.').
+                   '</td></tr></table>';
+    }
+    my $toomany = scalar(@collaborators) - $ncol;
+    if ($toomany > 0) {
+	$result .= '<table border="0"><tr bgcolor="#ffbbbb"><td>'.
+	           &mt('You have too many collaborators.').' '.
+                   &mt('Please remove [quant,_1,collaborator].',$toomany).
+	           '</td></tr></table>';
+    }
+    return $result;
+}
+
+
+
 1;
 __END__
 


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