--- loncom/homework/bridgetask.pm	2005/10/01 04:01:14	1.61
+++ loncom/homework/bridgetask.pm	2005/12/06 10:13:15	1.88
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: bridgetask.pm,v 1.61 2005/10/01 04:01:14 albertel Exp $
+# $Id: bridgetask.pm,v 1.88 2005/12/06 10:13:15 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -60,7 +60,7 @@ sub initialize_bridgetask {
 }
 
 sub proctor_check_auth {
-    my ($slot_name,$slot)=@_;
+    my ($slot_name,$slot,$type)=@_;
     my $user=$env{'form.proctorname'};
     my $domain=$env{'form.proctordomain'};
     
@@ -68,8 +68,18 @@ sub proctor_check_auth {
     foreach my $possible (@allowed) {
 	my ($puser,$pdom)=(split('@',$possible));
 	if ($puser eq $user && $pdom eq $domain) {
-	    my $authhost=&Apache::lonnet::authenticate($puser,$env{'form.proctorpassword'},$pdom);
-	    if ($authhost ne 'no_host') {
+	    my $authenticated=0;
+	    if ( $slot->{'secret'} =~ /\S/ &&
+		 $env{'form.proctorpassword'} eq $slot->{'secret'} ) {
+		$authenticated=1;
+	    } else {
+		
+		my $authhost=&Apache::lonnet::authenticate($puser,$env{'form.proctorpassword'},$pdom);
+		if ($authhost ne 'no_host') {
+		    $authenticated=1;
+		}
+	    }
+	    if ($authenticated && $type eq 'Task') {
 		my $version=
 		    $Apache::lonhomework::results{'resource.version'}=
 		    ++$Apache::lonhomework::history{'resource.version'};
@@ -83,6 +93,12 @@ sub proctor_check_auth {
 		    }
 		}
 		return 1;
+	    } elsif ($authenticated && $type eq 'problem') {
+		&Apache::lonxml::debug("authed #slot_name");
+		$Apache::lonhomework::results{"resource.0.checkedin"}=
+		    $user.'@'.$domain;
+		$Apache::lonhomework::results{"resource.0.checkedin.slot"}=
+		    $slot_name;
 	    }
 	}
     }
@@ -294,6 +310,7 @@ sub show_task {
 		       ( $status eq 'INVALID_ACCESS') )) {
 	return 0;
     }
+    if ($env{'form.donescreen'}) { return 0; }
     return 1;
 }
 
@@ -316,8 +333,8 @@ sub submission_time_stamp {
 	my $slot_name=$Apache::lonhomework::history{'resource.'.$version.'.checkedin.slot'};
 	my %slot=&Apache::lonnet::get_slot($slot_name);
 	my $diff = $slot{'endtime'} - $submissiontime;
-	my ($color,$when)=('red','after');
-	if ($diff > 0) { ($color,$when)=('green','before'); }
+	my ($color,$when)=('#FF6666','after');
+	if ($diff > 0) { ($color,$when)=('#336600','before'); }
 	my $info;
 	if ($diff%60) { $info=($diff%60).' seconds'; }
 	$diff=int($diff/60);
@@ -334,13 +351,46 @@ sub submission_time_stamp {
     return $result;
 }
 
+sub webgrade_standard_info {
+    my ($version)=&get_version();
+    my (undef,undef,$udom,$uname) = &Apache::lonxml::whichuser();
+    my $file_url = '/uploaded/'.$udom.'/'.$uname.'/portfolio/';
+    my $file_list="<ul>\n";
+    foreach my $partial_file (split(',',$Apache::lonhomework::history{"resource.$version.0.bridgetask.portfiles"})) {
+	my $file=$file_url.$partial_file;
+	$file=~s|/+|/|g;
+	&Apache::lonnet::allowuploaded('/adm/bridgetask',$file);
+	$file_list.='<li><nobr><a href="'.$file.'?rawmode=1" target="lonGRDs"><img src="'.
+	    &Apache::loncommon::icon($file).'" border=0"> '.$file.
+	    '</a></nobr></li>'."\n";
+    }
+    $file_list.="</ul>\n";
+
+    my %lt=&Apache::lonlocal::texthash('done' => 'Done',
+				       'stop' => 'Stop',
+				       );
+				       
+    my $result=<<INFO;
+<div class="handininfo">
+  <input type="submit" name="next" value="$lt{'done'}" />
+  <input type="submit" name="stop" value="$lt{'stop'}" />
+  $file_list
+</div>
+INFO
+    return $result;
+}
+
 sub start_Task {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my ($status,$accessmsg,$slot);
     if ($target ne 'webgrade') {
+	&Apache::structuretags::init_problem_globals('Task');
 	&Apache::structuretags::initialize_storage();
 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
+	if ($env{'request.state'} eq 'construct') {
+	    &Apache::structuretags::setup_rndseed($safeeval);
+	}
     } 
 
     $Apache::lonhomework::parsing_a_task=1;
@@ -348,7 +398,7 @@ sub start_Task {
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
 	&Apache::structuretags::page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
     
-    if ($target eq 'web') {
+    if ($target eq 'web' && $env{'request.state'} ne 'construct') {
 	if ($Apache::lonhomework::modifygrades) {
 	    $body_tag_start.='<form name="gradesubmission" method="POST" action="';
 	    my $uri=$env{'request.uri'};
@@ -365,11 +415,14 @@ sub start_Task {
 	    }
 	}
     }
+    if ($target eq 'web' && $env{'request.state'} eq 'construct') {
+	$form_tag_start.=&Apache::structuretags::problem_web_to_edit_header($env{'form.rndseed'});
+    }
     if ($target eq 'web' || ($target eq 'grade' && !$env{'form.webgrade'}) || $target eq 'answer' ||
 	$target eq 'tex') {
 	my ($version,$previous)=&get_version();
 	($status,$accessmsg,my $slot_name,$slot) = 
-	    &Apache::lonhomework::check_task_access('0');
+	    &Apache::lonhomework::check_slot_access('0','Task');
 	push(@Apache::inputtags::status,$status);
 	$Apache::inputtags::slot_name=$slot_name;
 	my $expression='$external::datestatus="'.$status.'";';
@@ -378,9 +431,12 @@ sub start_Task {
 	&Apache::lonxml::debug("Got $status");
 	$body_tag_start.=&add_previous_version_button($status);
 	if (!&show_task($status,$previous)) {
-	    my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
+	    my $bodytext=&Apache::lonxml::get_all_text("/task",$parser,$style);
 	    if ( $target eq "web" ) {
 		$result.= $head_tag_start.'</head>'.$body_tag_start;
+		if ($env{'request.state'} eq 'construct') {
+		    $result.=$form_tag_start;
+		}
 		my $msg;
 		if ($status eq 'UNAVAILABLE') {
 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
@@ -392,6 +448,18 @@ sub start_Task {
 			'</h1>'.&proctor_validation_screen($slot);
 		} elsif ($status eq 'WAITING_FOR_GRADE') {
 		    $msg.='<h1>'.&mt('Your submission is in the grading queue.').'</h1>';
+		} elsif ($env{'form.donescreen'}) {
+		    my $title=&Apache::lonnet::gettitle();
+		    my @files=split(',',$Apache::lonhomework::history{'resource.'.$version.'.0.bridgetask.portfiles'});
+		    my $files='<ul><li>'.join('</li><li>',@files).'</li></ul>';
+		    $result.=<<DONESCREEN;
+<h2>$title</h2>
+<p> Files submitted: $files </p>
+<p> You are now done with this Bridge Task </p>
+<hr />
+<p> <a href="/adm/logout">Logout</a> </p>
+<p> <a href="/adm/roles">Change to a different course</a> </p>
+DONESCREEN
 		} elsif ($status ne 'NOT_YET_VIEWED') {
 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
 		}
@@ -408,7 +476,12 @@ sub start_Task {
 		}
 	    } elsif ($target eq 'grade' && !$env{'form.webgrade'}) {
 		if ($status eq 'NEEDS_CHECKIN') {
-		    &proctor_check_auth($slot_name,$slot);
+		    if(&proctor_check_auth($slot_name,$slot,'Task')
+		       && defined($Apache::inputtags::slot_name)) {
+			my $result=&add_to_queue('gradingqueue',
+						 [$Apache::inputtags::slot_name]);
+			&Apache::lonxml::debug("add_to_queue said $result");
+		    }
 		}
 	    }
 	} elsif ($target eq 'web') {
@@ -459,23 +532,27 @@ sub start_Task {
 	} else {
 	    if ($target eq 'webgrade') {
 		$result.="\n";
+		my $back='<p><a href="/adm/flip?postdata=return:">'.
+		    &mt('Return to resource').'</a></p>';
 		if      ($status_code eq 'stop') {
-		    $result.='<b>'.&mt("Stopped grading.").'</b>';
+		    $result.='<b>'.&mt("Stopped grading.").'</b>'.$back;
 		} elsif ($status_code eq 'lock_failed') {
-		    $result.='<b>'.&mt("Failed to lock the request record.").'</b>';
+		    $result.='<b>'.&mt("Failed to lock the request record.")
+			.'</b>'.$back;
 		} elsif ($status_code eq 'unlock') {
-		    $result.='<b>'.&mt("Unlocked the requested record.").'</b>';
+		    $result.='<b>'.&mt("Unlocked the requested record.")
+			.'</b>'.$back;
 		    $result.=&show_queue($env{'form.queue'},1);
 		} elsif ($status_code eq 'show_list') {
 		    $result.=&show_queue($env{'form.queue'},1);
 		} elsif ($status_code eq 'select_user') {
 		    $result.=&select_user();
 		} else {
-		    $result.='<b>'.&mt("No user to be graded.").'</b>';
+		    $result.='<b>'.&mt("No user to be graded.").'</b>'.$back;
 		}
 	    }
 	    $webgrade='no';
-	    my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
+	    my $bodytext=&Apache::lonxml::get_all_text("/task",$parser,$style);
 	}
 	if ($target eq 'webgrade' && defined($env{'form.queue'})) {
 	    if ($webgrade eq 'yes') {
@@ -490,7 +567,23 @@ sub start_Task {
 		$result.='<input type="hidden" name="regrade" value="'.
 		    $env{'form.regrade'}.'" />';
 	    }
-	}
+	    if ($env{'form.chosensections'}) {
+		my @chosen_sections=
+		    &Apache::loncommon::get_env_multiple('form.chosensections');
+		foreach my $sec (@chosen_sections) {
+		    $result.='<input type="hidden" name="chosensections" 
+                               value="'.$sec.'" />';
+		}
+	    }
+	    if ($webgrade eq 'yes') { $result.=&webgrade_standard_info(); }
+	}
+    } elsif ($target eq 'edit') {
+	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
+	    &Apache::structuretags::problem_edit_header();
+	$Apache::lonxml::warnings_error_header=
+	    &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
+	my $temp=&Apache::edit::insertlist($target,$token);
+	$result.=$temp;
     } else {
 	# page_start returned a starting result, delete it if we don't need it
 	$result = '';
@@ -589,7 +682,6 @@ sub get_key_todo {
     }
     return (undef,undef)
 }
-
 sub end_Task {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
@@ -597,15 +689,13 @@ sub end_Task {
     my ($version,$previous)=&get_version();
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
 	$target eq 'tex') {
-	if (
-	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
-	    ($target eq 'answer') || ($target eq 'tex')
-	   ) {
+	if ($target eq 'web' || $target eq 'answer' || $target eq 'tex') {
 	    if ($target eq 'web') {
 		if (&show_task($status,$previous)) {
 		    $result.=&Apache::lonxml::endredirection();
 		}
-		if ($status eq 'CAN_ANSWER' && !$previous) {
+		if ($status eq 'CAN_ANSWER' && !$previous && 
+		    !$env{'form.donescreen'}) {
 		    $result.="\n".'<table border="1">'.
 			&Apache::inputtags::file_selector("$version.0",
 							  "bridgetask","*",
@@ -614,26 +704,38 @@ sub end_Task {
 <h2>'.&mt('Submit Portfolio Files for Grading').'</h2>
 <p>'.&mt('Indicate the files from your portfolio to be evaluated in grading this task.').'</p>').
 							  "</table>";
-		    $result.=&Apache::inputtags::gradestatus('0');
 		}
+		if (!$previous && $status ne 'SHOW_ANSWER' &&
+		    &show_task($status,$previous)) {
+		    $result.=&Apache::inputtags::gradestatus('0');
+		    $result.='</form>';
+		    $result.=<<DONEBUTTON;
+<form method="POST">
+   <input type="hidden" name="donescreen" value="1" />
+   <input type="submit" value="Done" />
+</form>
+DONEBUTTON
+                }
 		if (&show_task($status,$previous) &&
 		    $Apache::lonhomework::history{"resource.$version.status"} =~ /^(pass|fail)$/) {
 		    my $bt_status=$Apache::lonhomework::history{"resource.$version.status"};
 		    my $title=&Apache::lonnet::gettitle();
-		    my %slot=&Apache::lonnet::get_slot($Apache::inputtags::slot_name);
+
+		    my $slot_name=
+			$Apache::lonhomework::history{"resource.$version.checkedin.slot"};
+		    my %slot=&Apache::lonnet::get_slot($slot_name);
 		    my $start_time=
 			&Apache::lonlocal::locallocaltime($slot{'starttime'});
 
-		    my $status;
-		    $status.="\n<div class='$bt_status'>\n";
+		    my $status = "\n<div class='$bt_status'>\n";
 		    
 		    if ($bt_status eq 'pass')  {
 			$status.='<h2>You passed the '.$title.' given on '.
-			    $start_time.'.</h2>';
+			    $start_time.'</h2>';
 		    }
 		    if ($bt_status eq 'fail')  {
 			$status.='<h2>You did not pass the '.$title.' given on '.
-			    $start_time.'.</h2>';
+			    $start_time.'</h2>';
 			if (!$previous) {
 			    $status.=&add_request_another_attempt_button();
 			}
@@ -680,12 +782,18 @@ sub end_Task {
 		    $award;
 		$Apache::lonhomework::results{"resource.0.submission"}=
 		    $Apache::lonhomework::results{"resource.$version.0.submission"}='';
+	    } else {
+		delete($Apache::lonhomework::results{"resource.$version.0.bridgetask.portfiles"});
+		$award = '';
 	    }
 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
 	    &Apache::structuretags::finalize_storage();
-	    if ($award eq 'SUBMITTED') {
-		&add_to_queue('gradingqueue',$Apache::inputtags::slot_name);
+	    if ($award eq 'SUBMITTED'
+		&& defined($Apache::inputtags::slot_name)) {
+		&add_to_queue('gradingqueue',[$Apache::inputtags::slot_name]);
 	    }
+	} elsif ($Apache::lonhomework::results{'INTERNAL_store'}) {
+	    &Apache::structuretags::finalize_storage();
 	}
 	if ($target eq 'grade' && $env{'form.webgrade'} eq 'yes') {
 	    my $optional_required=
@@ -796,9 +904,15 @@ sub end_Task {
 	#    &mt('Save Partial Grade and Continue Grading').'" /> ';
 	$result.='</form>'.&Apache::loncommon::endbodytag().'</html>';
     } elsif ($target eq 'meta') {
-	$result.='<parameter part="0" package="Task"></parameter>'."\n";
-	#$result.=&Apache::response::meta_part_order();
-	#$result.=&Apache::response::meta_response_order();
+	$result.=&Apache::response::meta_package_write('Task');
+        $result.=&Apache::response::meta_stores_write('solved','string',
+						      'Problem Status');
+	$result.=&Apache::response::meta_stores_write('tries','int_zeropos',
+						      'Number of Attempts');
+	$result.=&Apache::response::meta_stores_write('awarded','float',
+						      'Partial Credit Factor');
+	$result.=&Apache::response::meta_stores_write('status','string',
+						      'Bridge Task Status');
     }
     undef($Apache::lonhomework::parsing_a_task);
     return $result;
@@ -813,7 +927,7 @@ sub move_between_queues {
     } else {
 	$cur_data = ['none'];
     }
-    my $result=&add_to_queue($dest_queue,$cur_data->[0]);
+    my $result=&add_to_queue($dest_queue,[$cur_data->[0]]);
     if ($result ne 'ok') {
 	return $result;
     }
@@ -841,13 +955,38 @@ sub check_queue_unlock {
     return 'not_owner';
 }
 
+sub in_queue {
+    my ($queue,$symb,$cdom,$cnum,$udom,$uname)=@_;
+    if ($queue eq 'none') { return 0; }
+    if (!defined($symb) || !defined($cdom) || !defined($cnum)
+	|| !defined($udom) || !defined($uname)) {
+	($symb,my $cid,$udom,$uname)=&Apache::lonxml::whichuser();
+	$cnum=$env{'course.'.$cid.'.num'};
+	$cdom=$env{'course.'.$cid.'.domain'};
+    }
+
+    my $key=&encode_queue_key($symb,$udom,$uname);
+    my %results = &Apache::lonnet::get($queue,[$key],$cdom,$cnum);
+
+    if (defined($results{$key})) {
+	return 1;
+    }
+    return 0;
+}
+
 sub remove_from_queue {
-    my ($queue)=@_;
+    my ($queue,$symb,$cdom,$cnum,$udom,$uname)=@_;
     if ($queue eq 'none') { return 'ok'; }
-    my ($symb,$cid,$udom,$uname)=&Apache::lonxml::whichuser();
-    my $cnum=$env{'course.'.$cid.'.num'};
-    my $cdom=$env{'course.'.$cid.'.domain'};
-    my $key="$symb\0queue\0$uname\@$udom";
+    if (!defined($symb) || !defined($cdom) || !defined($cnum)
+	|| !defined($udom) || !defined($uname)) {
+	($symb,my $cid,$udom,$uname)=&Apache::lonxml::whichuser();
+	$cnum=$env{'course.'.$cid.'.num'};
+	$cdom=$env{'course.'.$cid.'.domain'};
+    }
+    if (!&in_queue($queue,$symb,$cdom,$cnum,$udom,$uname)) {
+	return 'ok';
+    }
+    my $key=&encode_queue_key($symb,$udom,$uname);
     my @keys=($key,"$key\0locked");
     return &Apache::lonnet::del($queue,\@keys,$cdom,$cnum);
 }
@@ -876,10 +1015,10 @@ sub get_queue_data {
     return undef;
 }
 
+
 sub check_queue_for_key {
-    my ($cid,$queue,$todo)=@_;
-    my $cnum=$env{'course.'.$cid.'.num'};
-    my $cdom=$env{'course.'.$cid.'.domain'};
+    my ($cdom,$cnum,$queue,$todo)=@_;
+
     my %results=
 	&Apache::lonnet::get($queue,[$todo,"$todo\0locked"],$cdom,$cnum);
     
@@ -887,10 +1026,17 @@ sub check_queue_for_key {
 	if (defined($results{"$todo\0locked"})) {
 	    return 'locked';
 	}
-	my $slot=$results{$todo}->[0];
-	my %slot_data=&Apache::lonnet::get_slot($slot);
-	if ($slot_data{'endtime'} > time) { 
-	    return 'in_progress';
+	my $slot;
+	if (ref($results{$todo}) eq 'ARRAY')  {
+	    $slot = $results{$todo}[0];
+	} elsif (ref($results{$todo}) eq 'HASH')  {
+	    $slot = $results{$todo}{'slot'};
+	}
+	if (defined($slot)) {
+	    my %slot_data=&Apache::lonnet::get_slot($slot);
+	    if ($slot_data{'endtime'} > time) { 
+		return 'in_progress';
+	    }
 	}
 	return 'enqueued';
     }
@@ -898,14 +1044,17 @@ sub check_queue_for_key {
 }
 
 sub add_to_queue {
-    my ($queue,$slot_name)=@_;
+    my ($queue,$user_data)=@_;
     if ($queue eq 'none') { return 'ok'; }
     my ($symb,$cid,$udom,$uname)=&Apache::lonxml::whichuser();
+    if (!$cid || $env{'request.state'} eq 'construct') {
+	return 'no_queue';
+    }
     my $cnum=$env{'course.'.$cid.'.num'};
     my $cdom=$env{'course.'.$cid.'.domain'};
     my %data;
-    $data{"$symb\0queue\0$uname\@$udom"}=[$slot_name];
-    return &Apache::lonnet::put($queue,\%data,$cdom,$cnum);
+    $data{"$symb\0queue\0$uname\@$udom"}=$user_data;
+    return &Apache::lonnet::cput($queue,\%data,$cdom,$cnum);
 }
 
 sub show_queue {
@@ -920,6 +1069,10 @@ sub show_queue {
     &Apache::grades::init_perm();
     my ($classlist,$section,$fullname)=&Apache::grades::getclasslist(\@chosen_sections,);
     &Apache::grades::reset_perm();
+    if (!(grep(/^all$/,@chosen_sections))) {
+	$result.='<p> Showing only sections <tt>'.join(', ',@chosen_sections).
+	    '</tt>.</p> '."\n";
+    }
 
     my $regexp="^$symb\0";
     my %queue=&Apache::lonnet::dump($queue,$cdom,$cnum,$regexp);
@@ -927,7 +1080,7 @@ sub show_queue {
     if ($tmp=~/^error: 2 /) {
 	return "\n<h3>Current Queue - $queue</h3><table border='1'><tr><td>Empty</td></tr></table>";
     }
-    $result.="\n<h3>Current Queue - $queue </h3><table border='1'><tr>";
+    $result.="\n<h3>Current Queue - $symb $queue </h3><table border='1'><tr>";
     if ($with_selects) { $result.="<th></th>"; }
     $result.="<th>resource</th><th>user</th><th>type</th><th>data</th></tr>";
     foreach my $key (sort(keys(%queue))) {
@@ -959,6 +1112,11 @@ sub show_queue {
 			($action,$description)=('unlock',&mt('Unlock'));
 		    }
 		}
+		my $seclist;
+		foreach my $sec (@chosen_sections) {
+		    $seclist.='<input type="hidden" name="chosensections" 
+                               value="'.$sec.'" />';
+		}
 		if (time > $slot_data{'endtime'}) {
 		    $result.=(<<FORM);
 <td>
@@ -969,6 +1127,7 @@ sub show_queue {
  <input type="hidden" name="webgrade" value="no" />
  <input type="hidden" name="queuemode" value="selected" />
  <input type="submit" name="submit" value="$description" />
+ $seclist
 </form>
 </td>
 FORM
@@ -1048,6 +1207,8 @@ sub queue_key_locked {
 sub pick_from_queue_data {
     my ($queue,$check_section,$queuedata,$cdom,$cnum)=@_;
     foreach my $key (keys(%$queuedata)) {
+	if ($key =~ /\0locked$/) { next; }
+	if ($key =~ /\0timestamp$/) { next; }
 	my ($symb,$uname,$udom)=&decode_queue_key($key);
 	if ($check_section) {
 	    my $section=&Apache::lonnet::getsection($uname,$udom);
@@ -1107,6 +1268,27 @@ sub lock_key {
     return 0;
 }
 
+sub get_queue_symb_status {
+    my ($queue,$symb,$cdom,$cnum) = @_;
+    if (!defined($cdom) || !defined($cnum)) {
+	my (undef,$cid)=&Apache::lonxml::whichuser();
+	$cnum=$env{'course.'.$cid.'.num'};
+	$cdom=$env{'course.'.$cid.'.domain'};
+    }
+    my $regexp="^$symb\0";
+    my %queue=&Apache::lonnet::dump($queue,$cdom,$cnum,$regexp);
+    my ($tmp)=%queue;
+    if ($tmp=~/^error: 2 /) { return; }
+    my @users;
+    foreach my $key (sort(keys(%queue))) {
+	next if ($key=~/locked$/);
+	next if ($key=~/timestamp$/);
+	my ($symb,$uname,$udom) = &decode_queue_key($key);
+	push(@users,"$uname:$udom");
+    }
+    return @users;
+}
+
 sub get_from_queue {
     my ($queue)=@_;
     my $result;
@@ -1118,8 +1300,8 @@ sub get_from_queue {
     if ($todo) { return $todo; }
     while (1) {
 	my $starttime=time;
-	&Apache::lonnet::put($queue,{"$symb\0timestamp"=>$starttime},
-			     $cdom,$cnum);
+	&Apache::lonnet::cput($queue,{"$symb\0timestamp"=>$starttime},
+			      $cdom,$cnum);
 	&Apache::lonxml::debug("$starttime");
 	my $regexp="^$symb\0queue\0";
 	my %queue=&Apache::lonnet::dump($queue,$cdom,$cnum,$regexp);
@@ -1173,18 +1355,27 @@ sub get_from_queue {
 
 sub select_user {
     my ($symb,$cid)=&Apache::lonxml::whichuser();
-    my $result.='<table border="1">';
 
     my @chosen_sections=
 	&Apache::loncommon::get_env_multiple('form.chosensections');
     &Apache::grades::init_perm();
     my ($classlist,$section,$fullname)=&Apache::grades::getclasslist(\@chosen_sections,);
     &Apache::grades::reset_perm();
+    
+    my $result;
+    if (!(grep(/^all$/,@chosen_sections))) {
+	$result.='<p> Showing only sections <tt>'.join(', ',@chosen_sections).
+	    '</tt>.</p> '."\n";
+    }
+    $result.='<table border="1">';
 
     foreach my $student (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
 	my ($uname,$udom) = split(/:/,$student);
 	
-	my %status = &get_student_status($symb,$cid,$udom,$uname);
+	my $cnum=$env{'course.'.$cid.'.num'};
+	my $cdom=$env{'course.'.$cid.'.domain'};
+	my %status = &get_student_status($symb,$cdom,$cnum,$udom,$uname,
+					 'Task');
 	my $queue = 'none';
 	my $cannot_grade;
 	if ($status{'reviewqueue'} =~ /^(in_progress|enqueue)$/) {
@@ -1204,6 +1395,11 @@ sub select_user {
 	    $result.='<tr><td>&nbsp;</td><td>'.$fullname->{$student}.
 		'</td><td>';
 	} else {
+	    my $seclist;
+	    foreach my $sec (@chosen_sections) {
+		$seclist.='<input type="hidden" name="chosensections" 
+                               value="'.$sec.'" />';
+	    }
 	    $result.=<<RESULT;
 <tr>
   <td>
@@ -1212,7 +1408,8 @@ sub select_user {
       <input type="hidden" name="queue" value="$queue" />
       <input type="hidden" name="webgrade" value="no" />
       <input type="hidden" name="regrade" value="yes" />
-     <input type="submit" name="submit" value="Regrade" />
+      <input type="submit" name="submit" value="Regrade" />
+      $seclist
     </form>
   <td>$fullname->{$student}</td>
   <td>
@@ -1257,17 +1454,23 @@ RESULT
 }
 
 sub get_student_status {
-    my ($symb,$cid,$udom,$uname)=@_;
-    my %record = &Apache::lonnet::restore($symb,$env{'request.course.id'},
-					  $udom,$uname);
+    my ($symb,$cdom,$cnum,$udom,$uname,$type)=@_;
+
     my %status;
-    $status{'status'}=$record{'resource.status'};
-    $status{'version'}=$record{'resource.version'};
-    $status{'grader'}=$record{'resource.grader'};
-    $status{'reviewqueue'}=&check_queue_for_key($cid,'reviewqueue',
-				       &encode_queue_key($symb,$udom,$uname));
-    $status{'gradingqueue'}=&check_queue_for_key($cid,'gradingqueue',
-				       &encode_queue_key($symb,$udom,$uname));
+
+    if ($type eq 'Task') {
+	my %record = &Apache::lonnet::restore($symb,$env{'request.course.id'},
+					  $udom,$uname);
+	$status{'status'}=$record{'resource.status'};
+	$status{'version'}=$record{'resource.version'};
+	$status{'grader'}=$record{'resource.grader'};
+    }
+    $status{'reviewqueue'}=
+	&check_queue_for_key($cdom,$cnum,'reviewqueue',
+			     &encode_queue_key($symb,$udom,$uname));
+    $status{'gradingqueue'}=
+	&check_queue_for_key($cdom,$cnum,'gradingqueue',
+			     &encode_queue_key($symb,$udom,$uname));
     return %status;
 }
 
@@ -1313,12 +1516,40 @@ sub start_Dimension {
 }
 
 sub get_instance {
-    &Apache::response::pushrandomnumber();
-    my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
-    my $num=@order;
-    my $version=&get_version();
-    my $which=($version-1)%$num;
-    return $order[$which];
+    my ($dim)=@_;
+    my $rand_alg=&Apache::lonnet::get_rand_alg();
+    if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
+	$rand_alg eq '64bit2' || $rand_alg eq '64bit3' ||
+	$rand_alg eq '64bit4' ) {
+	&Apache::response::pushrandomnumber();
+	my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
+	my $num=@order;
+	my $version=&get_version();
+	my $which=($version-1)%$num;
+	return $order[$which];
+    } else {
+	my ($version,$previous) = &get_version();
+	my $instance = 
+	    $Apache::lonhomework::history{"resource.$version.0.$dim.instance"};
+	if (defined($instance)) { return $instance; }
+
+	&Apache::response::pushrandomnumber();
+	my @instances = @{$dimension{'instances'}};
+	# remove disabled instances
+	for (my $i=0; $i < $#instances; $i++) {
+	    if ($dimension{$instances[$i].'.disabled'}) {
+		splice(@instances,$i,1);
+		$i--;
+	    }
+	}
+	@instances = &Math::Random::random_permutation(@instances);
+	$instance  = $instances[($version-1)%scalar(@instances)];
+	$Apache::lonhomework::results{"resource.$version.0.$dim.instance"} = 
+	    $instance;
+	$Apache::lonhomework::results{'INTERNAL_store'} = 1; 
+	&Apache::response::poprandomnumber();
+	return $instance;
+    }
 }
 
 {
@@ -1327,76 +1558,86 @@ sub get_instance {
 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 	my $result=&Apache::lonxml::endredirection();
 	my $dim=&get_id($parstack,$safeeval);
-	my $instance=&get_instance();
+	my $instance=&get_instance($dim);
 	my $version=&get_version();
 	if ($target eq 'web') {
 	    @Apache::scripttag::parser_env = @_;
 	    $result.=&Apache::scripttag::xmlparse($dimension{'intro'});
-	    @Apache::scripttag::parser_env = @_;
-	    $result.=&Apache::scripttag::xmlparse($dimension{$instance.'.text'});
-	    if ($Apache::lonhomework::history{"resource.$version.status"} eq 'pass' ||
-		$Apache::lonhomework::history{"resource.$version.status"} eq 'fail') {
-
-		my $dim_status=$Apache::lonhomework::history{"resource.$version.$dim.status"};
-		my $mandatory='Mandatory';
-		if ($Apache::bridgetask::dimensionmandatory{$dim} eq 'N') {
-		    $mandatory='Optional';
-		}
-		my $dim_info="<div class='$dim_status'>\n";
-		if ($dim_status eq 'pass') {
-		    $dim_info.='<h3>Question : you passed this '.$mandatory.' question</h3>';
-		}
-		if ($dim_status eq 'fail') {
-		    $dim_info.='<h3>Question : you did not pass this '.$mandatory.' question</h3>';
-		}
-		my $man_count=0;
-		my $opt_count=0;
-		my $opt_passed=0;
-		foreach my $id (@{$dimension{$instance.'.criterias'}}) {
-		    if ($dimension{$instance.'.criteria.'.$id.'.mandatory'} 
-			eq 'N') {
-			$opt_count++;
-			if ($Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.status"} eq 'pass') {
-			    $opt_passed++;
-			}
-		    } else {
-			$man_count++;
-		    }
-		}
-		my $opt_req=&Apache::lonxml::get_param('OptionalRequired',
-						       $parstack,$safeeval);
-		if ($opt_req !~ /\S/) { $opt_req='0'; }
-		$dim_info.="\n<p>".&mt('You passed all of the mandatory components and [_1] of the [_2] optional components, of which you were required to pass [_3].',$opt_passed,$opt_count,$opt_req)."</p>\n</div>";
-
-		my $internal_location=&internal_location($dim);
-		$result=~s/\Q$internal_location\E/$dim_info/;
-
-		foreach my $id (@{$dimension{$instance.'.criterias'}}) {
-		    my $status=$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.status"};
-		    my $comment=$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"};
-		    my $mandatory=($dimension{$instance.'.criteria.'.$id.'.mandatory'} ne 'N');
-		    if ($mandatory) {
-			$mandatory='Mandatory';
-		    } else {
+	    my @instances = $instance;
+	    if (&Apache::response::showallfoils()) {
+		@instances = @{$dimension{'instances'}};
+	    }
+	    foreach my $instance (@instances) {
+		@Apache::scripttag::parser_env = @_;
+		$result.=&Apache::scripttag::xmlparse($dimension{$instance.'.text'});
+		if ($Apache::lonhomework::history{"resource.$version.status"} eq 'pass' ||
+		    $Apache::lonhomework::history{"resource.$version.status"} eq 'fail') {
+
+		    my $dim_status=$Apache::lonhomework::history{"resource.$version.$dim.status"};
+		    my $mandatory='Mandatory';
+		    if ($Apache::bridgetask::dimensionmandatory{$dim} eq 'N') {
 			$mandatory='Optional';
 		    }
-		    if ($status eq 'fail') {
-		    } elsif ($status eq 'pass') {
-		    } else {
-			&Apache::lonxml::error("Student viewing a graded bridgetask was shown a status of $status");
+		    my $dim_info="<div class='$dim_status'>\n";
+		    if ($dim_status eq 'pass') {
+			$dim_info.='<h3>Question : you passed this '.$mandatory.' question</h3>';
 		    }
-		    my $status_display=$status;
-		    $status_display=~s/^([a-z])/uc($1)/e;
-		    @Apache::scripttag::parser_env = @_;
-		    $result.='<div class="'.$status.'"><h4>'.$mandatory.
-			' Criteria</h4><p>';
-		    @Apache::scripttag::parser_env = @_;
-		    $result.=&Apache::scripttag::xmlparse($dimension{$instance.'.criteria.'.$id});
-		    $result.='</p><p class="grade">'.$status_display.'</p>';
-		    if ($Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"}) {
-			$result.='<p class="comment">'.$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"}.'</p>';
+		    if ($dim_status eq 'fail') {
+			$dim_info.='<h3>Question : you did not pass this '.$mandatory.' question</h3>';
+		    }
+		    my $man_count=0;
+		    my $man_passed=0;
+		    my $opt_count=0;
+		    my $opt_passed=0;
+		    foreach my $id (@{$dimension{$instance.'.criterias'}}) {
+			if ($dimension{$instance.'.criteria.'.$id.'.mandatory'} 
+			    eq 'N') {
+			    $opt_count++;
+			    if ($Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.status"} eq 'pass') {
+				$opt_passed++;
+			    }
+			} else {
+			    $man_count++;
+			    if ($Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.status"} eq 'pass') {
+				$man_passed++;
+			    }
+			}
+		    }
+		    if ($man_passed eq $man_count) { $man_passed='all'; }
+		    my $opt_req=$dimension{$instance.'.optionalrequired'};
+		    if ($opt_req !~ /\S/) { $opt_req='0'; }
+		    $dim_info.="\n<p>".&mt('You passed [_1] of the [_2] mandatory components and [_3] of the [_4] optional components, of which you were required to pass [_5].',$man_passed,$man_count,$opt_passed,$opt_count,$opt_req)."</p>\n</div>";
+
+		    my $internal_location=&internal_location($dim);
+		    $result=~s/\Q$internal_location\E/$dim_info/;
+
+		    foreach my $id (@{$dimension{$instance.'.criterias'}}) {
+			my $status=$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.status"};
+			my $comment=$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"};
+			my $mandatory=($dimension{$instance.'.criteria.'.$id.'.mandatory'} ne 'N');
+			if ($mandatory) {
+			    $mandatory='Mandatory';
+			} else {
+			    $mandatory='Optional';
+			}
+			if ($status eq 'fail') {
+			} elsif ($status eq 'pass') {
+			} else {
+			    &Apache::lonxml::error("Student viewing a graded bridgetask was shown a status of $status");
+			}
+			my $status_display=$status;
+			$status_display=~s/^([a-z])/uc($1)/e;
+			@Apache::scripttag::parser_env = @_;
+			$result.='<div class="'.$status.'"><h4>'.$mandatory.
+			    ' Criteria</h4><p>';
+			@Apache::scripttag::parser_env = @_;
+			$result.=&Apache::scripttag::xmlparse($dimension{$instance.'.criteria.'.$id});
+			$result.='</p><p class="grade">'.$status_display.'</p>';
+			if ($Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"}) {
+			    $result.='<p class="comment">'.$Apache::lonhomework::history{"resource.$version.$dim.$instance.$id.comment"}.'</p>';
+			}
+			$result.='</div>';
 		    }
-		    $result.='</div>';
 		}
 	    }
 	} elsif ($target eq 'webgrade') {
@@ -1429,23 +1670,7 @@ sub get_instance {
 		    '<td>'.
 		    '<a href="#'.$last_link.'">Prev</a><br />'.
 		    '<a href="#next_'.$link.'">Next</a><br /><br /><br />'.
-		    '<input type="submit" name="next" value="'.
-		    &mt('Done').'" /> '.
-		    '<input type="submit" name="stop" value="'.
-		    &mt('Stop').'" /> '.
 		    '</td></tr>';
-		$result.='<tr><td colspan="4">';
-		my (undef,undef,$udom,$uname) = &Apache::lonxml::whichuser();
-		my $file_url = '/uploaded/'.$udom.'/'.$uname.'/portfolio/';
-		foreach my $partial_file (split(',',$Apache::lonhomework::history{"resource.$version.0.bridgetask.portfiles"})) {
-		    my $file=$file_url.$partial_file;
-		    $file=~s|/+|/|g;
-		    &Apache::lonnet::allowuploaded('/adm/bridgetask',$file);
-		    $result.='<nobr><a href="'.$file.'" target="lonGRDs"><img src="'.
-			&Apache::loncommon::icon($file).'" border=0"> '.$file.
-			'</a></nobr> ';
-		}
-		$result.='</td></tr>';
 		$last_link=$link;
 	    }
 	} elsif ($target eq 'grade' && $env{'form.webgrade'}) {
@@ -1486,20 +1711,23 @@ sub get_instance {
 		$Apache::lonhomework::results{"resource.$version.$dim.status"}=
 		    'pass';
 	    }
+	} else {
+	    # any other targets no output
+	    undef($result);
 	}
 	return $result;
     }
 }
 
 sub start_IntroParagraph {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     if ($target eq 'web' || $target eq 'webgrade') {
 	if ($tagstack->[-2] eq 'Dimension') {
-	    $dimension{'intro'}=&Apache::lonxml::get_all_text('/introparagraph',$parser);
+	    $dimension{'intro'}=&Apache::lonxml::get_all_text('/introparagraph',$parser,$style);
 	
 	} elsif ($target eq 'webgrade') {
-	    &Apache::lonxml::get_all_text('/introparagraph',$parser);
+	    &Apache::lonxml::get_all_text('/introparagraph',$parser,$style);
 	}
 	
     }
@@ -1517,6 +1745,10 @@ sub start_Instance {
     push(@Apache::bridgetask::instancelist,$id);
     $dimension{$id.'.optionalrequired'}=
 	&Apache::lonxml::get_param('OptionalRequired',$parstack,$safeeval);
+    my $disabled = &Apache::lonxml::get_param('Disabled',$parstack,$safeeval);
+    if (lc($disabled) eq 'yes') {
+	$dimension{$id.'.disabled'}='1';
+    }
     return '';
 }
 
@@ -1524,9 +1756,9 @@ sub end_Instance {
 }
 
 sub start_InstanceText {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $instance_id=$Apache::bridgetask::instance[-1];
-    my $text=&Apache::lonxml::get_all_text('/instancetext',$parser);
+    my $text=&Apache::lonxml::get_all_text('/instancetext',$parser,$style);
     if ($target eq 'web' || $target eq 'webgrade') {
 	$dimension{$instance_id.'.text'}=$text;
     }
@@ -1538,9 +1770,9 @@ sub end_InstanceText {
 }
 
 sub start_Criteria {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $instance_id=$Apache::bridgetask::instance[-1];
-    my $criteria=&Apache::lonxml::get_all_text('/criteria',$parser);
+    my $criteria=&Apache::lonxml::get_all_text('/criteria',$parser,$style);
     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'grade') {
 	my $id=&get_id($parstack,$safeeval);
 	$dimension{$instance_id.'.criteria.'.$id}=$criteria;