--- loncom/homework/bridgetask.pm	2005/03/17 21:56:04	1.3
+++ loncom/homework/bridgetask.pm	2005/04/05 15:39:41	1.10
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: bridgetask.pm,v 1.3 2005/03/17 21:56:04 albertel Exp $
+# $Id: bridgetask.pm,v 1.10 2005/04/05 15:39:41 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -37,26 +37,71 @@ use Apache::lonmenu;
 use Apache::lonlocal;
 use Apache::lonxml;
 use Time::HiRes qw( gettimeofday tv_interval );
+
 BEGIN {
     &Apache::lonxml::register('Apache::bridgetask',('Task','IntroParagraph','Dimension','Instance','InstanceText','Criteria','ClosingParagraph'));
 }
 
+sub initialize_bridgetask {
+    # id of current Dimension, 0 means that no dimension is current 
+    # (inside <Task> only)
+    $Apache::bridgetask::dimension='';
+    # list of all Dimension ids seen
+    @Apache::bridgetask::dimensionlist=();
+    # list of all current Instance ids
+    @Apache::bridgetask::instance=();
+    # list of all Instance ids seen in this problem
+    @Apache::bridgetask::instancelist=();
+}
+
+sub proctor_check_auth {
+    my ($slot)=@_;
+    my $user=$ENV{'form.proctorname'};
+    my $domain=$ENV{'form.proctordomain'};
+    
+    my @allowed=split(",",$slot->{'proctor'});
+    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') {
+		$Apache::lonhomework::results{'resource.checkedin'}=
+		    $user.'@'.$domain;
+		return 1;
+	    }
+	}
+    }
+    return 0;
+}
+
+sub add_previous_version_button {
+    my $result;
+    $result.=&mt(' Show a previously done version: [_1]','<select name="previousversion">
+<option>Pick one</option>
+</select>');
+    return $result;
+}
+
 sub start_Task {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
-    #&initialize_storage();
-
-    my $status;
-    my $accessmsg;
+    &Apache::structuretags::initialize_storage();
+    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
 
+    my ($status,$accessmsg,$slot);
+    $Apache::lonhomework::parsing_a_task=1;
     #should get back a <html> or the neccesary stuff to start XML/MathML
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
 	&Apache::structuretags::page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
 
+    if ($target eq 'web') {
+	$body_tag_start.=&add_previous_version_button();
+    }
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex') {
-	($status,$accessmsg) = &Apache::lonhomework::check_task_access('0');
-	push (@Apache::inputtags::status,$status);
+	($status,$accessmsg,$slot) = 
+	    &Apache::lonhomework::check_task_access('0');
+	push(@Apache::inputtags::status,$status);
 	my $expression='$external::datestatus="'.$status.'";';
 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
 	&Apache::run::run($expression,$safeeval);
@@ -65,17 +110,19 @@ sub start_Task {
 	    ( $status eq 'BANNED') ||
 	    ( $status eq 'UNAVAILABLE') ||
 	    ( $status eq 'NOT_IN_A_SLOT') ||
+	    ( $status eq 'NEEDS_CHECKIN') ||
 	    ( $status eq 'INVALID_ACCESS')) {
 	    my $bodytext=&Apache::lonxml::get_all_text("/task",$parser);
 	    if ( $target eq "web" ) {
-		$result.= $head_tag_start.'</head>';
-		my $msg=$body_tag_start;
+		$result.= $head_tag_start.'</head>'.$body_tag_start;
+		my $msg;
 		if ($status eq 'UNAVAILABLE') {
 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
 		} elsif ($status eq 'NOT_IN_A_SLOT') {
 		    $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
-		} elsif ($status eq 'IN_A_SLOT') {
-		    $msg.='<h1>'.&mt('You need the Proctor to validate you.').'</h1>';
+		} elsif ($status eq 'NEEDS_CHECKIN') {
+		    $msg.='<h1>'.&mt('You need the Proctor to validate you.').
+			'</h1>'.&proctor_validation_screen($slot);
 		} elsif ($status ne 'NOT_YET_VIEWED') {
 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
 		}
@@ -90,6 +137,14 @@ sub start_Task {
 		} else {
 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
 		}
+	    } elsif ($target eq 'grade') {
+		if ($status eq 'NEEDS_CHECKIN') {
+		    if (&proctor_check_auth($slot)) {
+			#FIXME immeadiatly add this to the grading queue
+                        #      with slot->{'endtime'} for when grading can 
+                        #      begin on this resource
+ 		    }
+		}
 	    }
 	} elsif ($target eq 'web') {
 	    my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
@@ -122,18 +177,31 @@ sub end_Task {
 	    ($target eq 'answer') || ($target eq 'tex')
 	   ) {
 	    if ($target eq 'web') {
+		if ($status eq 'CAN_ANSWER') {
+		    $result.='<table border="1">'.
+			&Apache::inputtags::file_selector('0',"bridgetask","*",
+							  'portfolioonly').
+							  "</table>";
+		    $result.=&Apache::inputtags::gradestatus('0');
+		}
 		$result.=&Apache::lonxml::xmlend().'</html>';
 	    }
 	}
 	if ($target eq 'grade') {
-	    #&Apache::lonhomework::showhash(%Apache::lonhomework::results);
-	    #&finalize_storage();
+	    &Apache::essayresponse::file_submission('0','bridgetask','portfiles','SUBMITTED');
+	    if ($Apache::lonhomework::results{"resource.0.bridgetask.portfiles"}) {
+		$Apache::lonhomework::results{"resource.0.tries"}=
+		    1+$Apache::lonhomework::history{"resource.0.tries"};
+	    }
+	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
+	    &Apache::structuretags::finalize_storage();
 	}
     } elsif ($target eq 'meta') {
 	$result.='<parameter part="0" package="Task"></parameter>'."\n";
 	#$result.=&Apache::response::meta_part_order();
 	#$result.=&Apache::response::meta_response_order();
     }
+    undef($Apache::lonhomework::parsing_a_task);
     return $result;
 }
 
@@ -141,7 +209,6 @@ sub start_ClosingParagraph {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
     if ($target eq 'web') {
-	$result='<table border="1"><tr><td>Closing</td></tr><tr><td>';
     }
     return $result;
 }
@@ -150,17 +217,18 @@ sub end_ClosingParagraph {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
     if ($target eq 'web') {
-	$result='</td></tr></table>';
     }
     return $result;
 }
 
 my %dimension;
-my $dim_id;
 sub start_Dimension {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     undef(%dimension);
-    $dim_id=$Apache::lonxml::curdepth;
+    my $dim_id=$Apache::lonxml::curdepth;
+    $Apache::bridgetask::dimension=$dim_id;
+    push(@Apache::bridgetask::dimensionlist,$dim_id);
+    undef(@Apache::bridgetask::instance);
     return '';
 }
 
@@ -171,16 +239,14 @@ sub end_Dimension {
 	#FIXME just grabbing the first one for now, need
 	#to randomly pick one until all have been seen
 	#then start repicking
-	my $instance=$dimension{'instances'}->[0];
-	$result=$dimension{'intro'}.
-	    $dimension{$instance.'.text'}.
-	    '<table border="1"><tr><td>Criteria</td></tr><tr><td>';
-	foreach my $id (@{$dimension{$instance.'.criterias'}}) {
-	    $result.=$dimension{$instance.'.criteria.'.$id}.
-		'</td></tr><tr><td>';
-	}
-	$result=~s/<tr><td>$//;
-	$result.='</table>';
+	&Apache::response::pushrandomnumber();
+	my @order=&Math::Random::random_permutation(@{$dimension{'instances'}});
+	my $instance=$order[0];
+	$result=$dimension{'intro'}.$dimension{$instance.'.text'};
+	#FIXME: don't show the criteria yet
+	#foreach my $id (@{$dimension{$instance.'.criterias'}}) {
+	#    $result.=$dimension{$instance.'.criteria.'.$id};
+	#}
     }
     return $result;
 }
@@ -191,8 +257,6 @@ sub start_IntroParagraph {
     if ($target eq 'web') {
 	if ($tagstack->[-2] eq 'Dimension') {
 	    &Apache::lonxml::startredirection();
-	} else {
-	    $result='<table border="1"><tr><td>Intro</td></tr><tr><td>';
 	}
     }
     return $result;
@@ -204,18 +268,16 @@ sub end_IntroParagraph {
     if ($target eq 'web') {
 	if ($tagstack->[-2] eq 'Dimension') {
 	    $dimension{'intro'}=&Apache::lonxml::endredirection();
-	} else {
-	    $result='</td></tr></table>';
 	}
     }
     return $result;
 }
 
-my $instance_id;
 sub start_Instance {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     push(@{$dimension{'instances'}},$Apache::lonxml::curdepth);
-    $instance_id=$Apache::lonxml::curdepth;
+    push(@Apache::bridgetask::instance,$Apache::lonxml::curdepth);
+    push(@Apache::bridgetask::instancelist,$Apache::lonxml::curdepth);
     return '';
 }
 
@@ -234,6 +296,7 @@ sub start_InstanceText {
 
 sub end_InstanceText {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $instance_id=$Apache::bridgetask::instance[-1];
     if ($target eq 'web') {
 	$dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
     }
@@ -250,6 +313,7 @@ sub start_Criteria {
 
 sub end_Criteria {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $instance_id=$Apache::bridgetask::instance[-1];
     if ($target eq 'web') {
 	my $criteria=&Apache::lonxml::endredirection();
 	my $id=$Apache::lonxml::curdepth;
@@ -259,5 +323,36 @@ sub end_Criteria {
     return '';
 }
 
+sub proctor_validation_screen {
+    my ($slot) = @_;
+    my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
+    my $url=&Apache::lonnet::studentphoto($domain,$user,'jpg');
+    $user=$ENV{'form.proctorname'};
+    if ($ENV{'form.proctordomain'}) { $domain=$ENV{'form.proctordomain'}; }
+    my $msg;
+    if ($ENV{'form.proctorpassword'}) {
+	$msg='<p><font color="red">'.&mt("Failed to authenticate the proctor.")
+	    .'</font></p>';
+    }
+    my $result= (<<ENDCHECKOUT);
+<h2>Proctor Validation</h2>
+    <p>Your room's proctor needs to validate your access to this resource.</p>
+    $msg
+<form name="checkout" method="POST" action="$ENV{'request.uri'}">
+<input type="hidden" name="validate" value="yes" />
+<input type="hidden" name="submitted" value="yes" />
+<table>
+  <tr><td>Proctor's Username:</td><td><input type="string" name="proctorname" value="$user" /></td></tr>
+  <tr><td>Password:</td><td><input type="password" name="proctorpassword" value="" /></td></tr>
+  <tr><td>Proctor's Domain:</td><td><input type="string" name="proctordomain" value="$domain" /></td></tr>
+</table>
+<input type="submit" name="checkoutbutton" value="Validate"  /><br />
+Student who should be logged in is:<br />
+<img src="$url" /><br />
+</form>
+ENDCHECKOUT
+    return $result;
+}
+
 1;
 __END__