--- loncom/homework/outputtags.pm	2001/06/02 03:59:59	1.8
+++ loncom/homework/outputtags.pm	2005/10/11 10:48:23	1.39
@@ -1,53 +1,244 @@
+# The LearningOnline Network with CAPA 
+# tags that create controlled output
+#
+# $Id: outputtags.pm,v 1.39 2005/10/11 10:48:23 foxr Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+
 package Apache::outputtags; 
 
 use strict;
 use Apache::lonnet;
 use POSIX qw(strftime);
 
-sub BEGIN {
-  &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle'));
+BEGIN {
+    &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle','displayweight','displaystudentphoto'));
+}
+
+sub initialize_outputtags {
+    %Apache::outputtags::showonce=();
 }
 
+
 sub start_displayduedate {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-  my $result;
-  my $status=$Apache::inputtags::status['-1'];
-  &Apache::lonxml::debug("got a $status in duedatebox");
-  if (($status =~ /CAN.*_ANSWER/) && ($target eq 'web')) {
-    my $format = &Apache::lonxml::get_param('format',$parstack,$safeeval);
-    if ($format eq '') {
-      &Apache::lonxml::debug("using default format");
-      $format="%c";
-    }
-    my $id = $Apache::inputtags::part;
-    my $date = &Apache::lonnet::EXT("resource.$id.duedate");
-    &Apache::lonxml::debug("duedatebox found $date for $id");
-    if ($date) {
-       $result ='<table border="on"><tr><td>Due at '.
-         POSIX::strftime($format,localtime($date)).
-	   '</td></tr></table>';
-    } else {
-      $result ='<table border="on"><tr><td>No due date set.</td></tr></table>';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+
+    # Different parts can have different due dates... so we keep a list
+    # of the parts for which we've displayed the duedate:
+
+    if (exists($Apache::outputtags::showonce{'displayduedate'})) {
+	if (grep(/^\Q$Apache::inputtags::part\E$/,
+		 @{$Apache::outputtags::showonce{'displayduedate'}})) {
+	    return '';
+	}
     }
-  }
-  return $result;
+    push (@{$Apache::outputtags::showonce{'displayduedate'}},
+	  $Apache::inputtags::part);
+
+    my $status=$Apache::inputtags::status['-1'];
+    &Apache::lonxml::debug("got a $status in duedatebox");
+    my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
+    if (($status =~ /CAN.*_ANSWER/) && ($target eq 'web')) {
+	my $id = $Apache::inputtags::part;
+	my $date = &Apache::lonnet::EXT("resource.$id.duedate");
+	&Apache::lonxml::debug("duedatebox found $date for $id");
+
+	# Only show the due date if the current date is 
+	# different from due date of the previous part.  I think
+	# this is probably the best way to avoid due date clutter.
+
+       	my $showduedate = 1;
+	my $part_count  = scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
+	if ($part_count > 1) {
+	    my $prev_part_id = $Apache::outputtags::showonce{'displayduedate'}->[$part_count-2];
+	    my $prev_due_date = &Apache::lonnet::EXT("resource.$prev_part_id.duedate");
+	    if ($prev_due_date == $date) {
+		$showduedate = 0;
+	    }
+	}
+
+	if ($showduedate) {
+	    if (lc($style) !~ 'plain') { 
+		$result ='<table border="on"><tr><td>Due '.
+		    &Apache::lonnavmaps::timeToHumanString($date).
+		    '</td></tr></table>';
+	    } else {
+		$result=&mt('Due').' '.&Apache::lonnavmaps::timeToHumanString($date);
+	    }
+	}
+    } elsif ( $target eq 'edit' ) {
+	$result=&Apache::edit::tag_start($target,$token);
+	$result.='</td></tr>';
+	$result.=&Apache::edit::end_table();
+    }
+    return $result;
 }
 
 sub end_displayduedate {
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
 }
 
 sub start_displaytitle {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-  my $result='';
-  if ($target eq 'web') {
-    $result="<h1>$Apache::lonhomework::name</h1>";
-  }
-  return $result;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
+    if (exists($Apache::outputtags::showonce{'displayduetitle'})) {
+	return '';
+    } else {
+	$Apache::outputtags::showonce{'displayduetitle'}=1;
+    }
+    my $name=&Apache::structuretags::get_resource_name();
+    my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
+    if ($target eq 'web') {
+	$result=$name;
+	if (lc($style) !~ 'plain') { $result="<h1>$name</h1>"; }
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::tag_start($target,$token);
+	$result.='</td></tr>';
+	$result.=&Apache::edit::end_table();
+    } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
+	$name=&Apache::lonxml::latex_special_symbols($name);
+	if (lc($style) !~ 'plain') { 
+	    $result='\vskip 0 mm\noindent\textbf{'.$name.'}\vskip 0 mm';
+	} else {
+	    $result=$name;
+	}
+    }
+    return $result;
 }
 
 sub end_displaytitle {
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
+}
+
+sub multipart {
+    my ($uri)=@_;
+    if (!defined($uri)) { $uri=$env{'request.uri'}; }
+    my @parts;
+    my $metadata = &Apache::lonnet::metadata($uri,'packages');
+    foreach (split(/\,/,$metadata)) {
+	if ($_ =~ /^part_(.*)$/) {
+	    my $part = $1;
+	    if ($part ne '0') { push(@parts,$part); }
+	}
+    }
+    return @parts;
+}
+
+sub start_displayweight {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if (exists($Apache::outputtags::showonce{'displayweight'})) {
+	if(grep(/^\Q$Apache::inputtags::part\E$/,
+		@{$Apache::outputtags::showonce{'displayweight'}})) {
+	    return '';
+	}
+    }
+    push(@{$Apache::outputtags::showonce{'displayweight'}},
+	 $Apache::inputtags::part);
+    if ($target eq 'web' || $target eq 'tex') {
+	my $id = $Apache::inputtags::part;
+	if ($id ne '0') {
+	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
+	    if (!defined($weight) || ($weight eq '')) { $weight=1; }
+	    $result.=$weight;
+	} else {
+	    my @parts=&multipart($env{'request.uri'});
+	    my $weight;
+	    if (@parts) {
+	        foreach my $part (@parts) {
+		    my $pweight=&Apache::lonnet::EXT("resource.$part.weight");
+		    if (!defined($pweight) || ($pweight eq '')) { $pweight=1; }
+		    $weight+=$pweight;
+	        }
+	    } else {
+		$weight = &Apache::lonnet::EXT("resource.$id.weight");
+                if (!defined($weight) || ($weight eq '')) { $weight=1; }
+	    }
+	    $result=$weight;
+	}
+    } elsif ( $target eq 'edit' ) {
+	$result=&Apache::edit::tag_start($target,$token);
+	$result.='</td></tr>';
+	$result.=&Apache::edit::end_table();
+    }
+    return $result;
+}
+
+sub end_displayweight {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
+}
+
+sub start_displaystudentphoto {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
+    if ($target eq 'web' && $user eq $env{'user.name'}) {
+	my $url=&Apache::lonnet::studentphoto($domain,$user,"gif");
+	my $args;
+	my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
+	if ($width) { $args.=" width=\"$width\" "; }
+	my $height=&Apache::lonxml::get_param('heigth',$parstack,$safeeval);
+	if ($height) { $args.=" height=\"$height\" "; }
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval);
+	if ($align) { $args.=" align=\"$align\" "; }
+	$result.=" <img $args src=\"$url\" alt=\"$user\@$domain\" />";
+    }
+    if ($target eq 'tex' && $env{'request.role'} =~ /^cc/) {
+	my $url=&Apache::lonnet::studentphoto($domain,$user,"eps");
+	my $ua=new LWP::UserAgent;
+	my $request=new HTTP::Request('GET',$url);
+	my $response=$ua->request($request);
+	if ($response->is_success) {
+	    my $file=$user."_".$domain."_studentphoto.eps";
+	    open(FILE,">".$Apache::lonnet::perlvar{'lonPrtDir'}."/$file");
+	    print FILE $response->content;
+	    close(FILE);
+	    my $width_param=&Apache::londefdef::image_size($Apache::lonnet::perlvar{'lonPrtDir'}."/$file",'0.3',$parstack,$safeeval);
+	    $result.=' \graphicspath{{'.$Apache::lonnet::perlvar{'lonPrtDir'}.
+		'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
+	} else {
+	    $result="$user\@$domain";
+	}
+    }
+    return $result;
+}
+
+sub end_displaystudentphoto {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my @result;
+    if ($target eq 'edit') { $result[1]='no'; }
+    return @result;
 }
 
 1;