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Correct start_displayduedate to support mutipart problems with different duedates
for the separate parts.  Attempt to only show additional part duedates if they
differ from the previous duedate.  I think this is not yet 100% correct for the
case where there's a problem duedate, a part without an explicit duedate and
then a part with an explicit duedate same as the problem duedate... more testing
required.

    1: # The LearningOnline Network with CAPA 
    2: # tags that create controlled output
    3: #
    4: # $Id: outputtags.pm,v 1.39 2005/10/11 10:48:23 foxr Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: 
   29: package Apache::outputtags; 
   30: 
   31: use strict;
   32: use Apache::lonnet;
   33: use POSIX qw(strftime);
   34: 
   35: BEGIN {
   36:     &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle','displayweight','displaystudentphoto'));
   37: }
   38: 
   39: sub initialize_outputtags {
   40:     %Apache::outputtags::showonce=();
   41: }
   42: 
   43: 
   44: sub start_displayduedate {
   45:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   46:     my $result;
   47: 
   48:     # Different parts can have different due dates... so we keep a list
   49:     # of the parts for which we've displayed the duedate:
   50: 
   51:     if (exists($Apache::outputtags::showonce{'displayduedate'})) {
   52: 	if (grep(/^\Q$Apache::inputtags::part\E$/,
   53: 		 @{$Apache::outputtags::showonce{'displayduedate'}})) {
   54: 	    return '';
   55: 	}
   56:     }
   57:     push (@{$Apache::outputtags::showonce{'displayduedate'}},
   58: 	  $Apache::inputtags::part);
   59: 
   60:     my $status=$Apache::inputtags::status['-1'];
   61:     &Apache::lonxml::debug("got a $status in duedatebox");
   62:     my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
   63:     if (($status =~ /CAN.*_ANSWER/) && ($target eq 'web')) {
   64: 	my $id = $Apache::inputtags::part;
   65: 	my $date = &Apache::lonnet::EXT("resource.$id.duedate");
   66: 	&Apache::lonxml::debug("duedatebox found $date for $id");
   67: 
   68: 	# Only show the due date if the current date is 
   69: 	# different from due date of the previous part.  I think
   70: 	# this is probably the best way to avoid due date clutter.
   71: 
   72:        	my $showduedate = 1;
   73: 	my $part_count  = scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
   74: 	if ($part_count > 1) {
   75: 	    my $prev_part_id = $Apache::outputtags::showonce{'displayduedate'}->[$part_count-2];
   76: 	    my $prev_due_date = &Apache::lonnet::EXT("resource.$prev_part_id.duedate");
   77: 	    if ($prev_due_date == $date) {
   78: 		$showduedate = 0;
   79: 	    }
   80: 	}
   81: 
   82: 	if ($showduedate) {
   83: 	    if (lc($style) !~ 'plain') { 
   84: 		$result ='<table border="on"><tr><td>Due '.
   85: 		    &Apache::lonnavmaps::timeToHumanString($date).
   86: 		    '</td></tr></table>';
   87: 	    } else {
   88: 		$result=&mt('Due').' '.&Apache::lonnavmaps::timeToHumanString($date);
   89: 	    }
   90: 	}
   91:     } elsif ( $target eq 'edit' ) {
   92: 	$result=&Apache::edit::tag_start($target,$token);
   93: 	$result.='</td></tr>';
   94: 	$result.=&Apache::edit::end_table();
   95:     }
   96:     return $result;
   97: }
   98: 
   99: sub end_displayduedate {
  100:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  101:     my @result;
  102:     if ($target eq 'edit') { $result[1]='no'; }
  103:     return @result;
  104: }
  105: 
  106: sub start_displaytitle {
  107:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  108:     my $result='';
  109:     if (exists($Apache::outputtags::showonce{'displayduetitle'})) {
  110: 	return '';
  111:     } else {
  112: 	$Apache::outputtags::showonce{'displayduetitle'}=1;
  113:     }
  114:     my $name=&Apache::structuretags::get_resource_name();
  115:     my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
  116:     if ($target eq 'web') {
  117: 	$result=$name;
  118: 	if (lc($style) !~ 'plain') { $result="<h1>$name</h1>"; }
  119:     } elsif ($target eq 'edit') {
  120: 	$result=&Apache::edit::tag_start($target,$token);
  121: 	$result.='</td></tr>';
  122: 	$result.=&Apache::edit::end_table();
  123:     } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
  124: 	$name=&Apache::lonxml::latex_special_symbols($name);
  125: 	if (lc($style) !~ 'plain') { 
  126: 	    $result='\vskip 0 mm\noindent\textbf{'.$name.'}\vskip 0 mm';
  127: 	} else {
  128: 	    $result=$name;
  129: 	}
  130:     }
  131:     return $result;
  132: }
  133: 
  134: sub end_displaytitle {
  135:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  136:     my @result;
  137:     if ($target eq 'edit') { $result[1]='no'; }
  138:     return @result;
  139: }
  140: 
  141: sub multipart {
  142:     my ($uri)=@_;
  143:     if (!defined($uri)) { $uri=$env{'request.uri'}; }
  144:     my @parts;
  145:     my $metadata = &Apache::lonnet::metadata($uri,'packages');
  146:     foreach (split(/\,/,$metadata)) {
  147: 	if ($_ =~ /^part_(.*)$/) {
  148: 	    my $part = $1;
  149: 	    if ($part ne '0') { push(@parts,$part); }
  150: 	}
  151:     }
  152:     return @parts;
  153: }
  154: 
  155: sub start_displayweight {
  156:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  157:     my $result;
  158:     if (exists($Apache::outputtags::showonce{'displayweight'})) {
  159: 	if(grep(/^\Q$Apache::inputtags::part\E$/,
  160: 		@{$Apache::outputtags::showonce{'displayweight'}})) {
  161: 	    return '';
  162: 	}
  163:     }
  164:     push(@{$Apache::outputtags::showonce{'displayweight'}},
  165: 	 $Apache::inputtags::part);
  166:     if ($target eq 'web' || $target eq 'tex') {
  167: 	my $id = $Apache::inputtags::part;
  168: 	if ($id ne '0') {
  169: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
  170: 	    if (!defined($weight) || ($weight eq '')) { $weight=1; }
  171: 	    $result.=$weight;
  172: 	} else {
  173: 	    my @parts=&multipart($env{'request.uri'});
  174: 	    my $weight;
  175: 	    if (@parts) {
  176: 	        foreach my $part (@parts) {
  177: 		    my $pweight=&Apache::lonnet::EXT("resource.$part.weight");
  178: 		    if (!defined($pweight) || ($pweight eq '')) { $pweight=1; }
  179: 		    $weight+=$pweight;
  180: 	        }
  181: 	    } else {
  182: 		$weight = &Apache::lonnet::EXT("resource.$id.weight");
  183:                 if (!defined($weight) || ($weight eq '')) { $weight=1; }
  184: 	    }
  185: 	    $result=$weight;
  186: 	}
  187:     } elsif ( $target eq 'edit' ) {
  188: 	$result=&Apache::edit::tag_start($target,$token);
  189: 	$result.='</td></tr>';
  190: 	$result.=&Apache::edit::end_table();
  191:     }
  192:     return $result;
  193: }
  194: 
  195: sub end_displayweight {
  196:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  197:     my @result;
  198:     if ($target eq 'edit') { $result[1]='no'; }
  199:     return @result;
  200: }
  201: 
  202: sub start_displaystudentphoto {
  203:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  204:     my $result;
  205:     my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
  206:     if ($target eq 'web' && $user eq $env{'user.name'}) {
  207: 	my $url=&Apache::lonnet::studentphoto($domain,$user,"gif");
  208: 	my $args;
  209: 	my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
  210: 	if ($width) { $args.=" width=\"$width\" "; }
  211: 	my $height=&Apache::lonxml::get_param('heigth',$parstack,$safeeval);
  212: 	if ($height) { $args.=" height=\"$height\" "; }
  213: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval);
  214: 	if ($align) { $args.=" align=\"$align\" "; }
  215: 	$result.=" <img $args src=\"$url\" alt=\"$user\@$domain\" />";
  216:     }
  217:     if ($target eq 'tex' && $env{'request.role'} =~ /^cc/) {
  218: 	my $url=&Apache::lonnet::studentphoto($domain,$user,"eps");
  219: 	my $ua=new LWP::UserAgent;
  220: 	my $request=new HTTP::Request('GET',$url);
  221: 	my $response=$ua->request($request);
  222: 	if ($response->is_success) {
  223: 	    my $file=$user."_".$domain."_studentphoto.eps";
  224: 	    open(FILE,">".$Apache::lonnet::perlvar{'lonPrtDir'}."/$file");
  225: 	    print FILE $response->content;
  226: 	    close(FILE);
  227: 	    my $width_param=&Apache::londefdef::image_size($Apache::lonnet::perlvar{'lonPrtDir'}."/$file",'0.3',$parstack,$safeeval);
  228: 	    $result.=' \graphicspath{{'.$Apache::lonnet::perlvar{'lonPrtDir'}.
  229: 		'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
  230: 	} else {
  231: 	    $result="$user\@$domain";
  232: 	}
  233:     }
  234:     return $result;
  235: }
  236: 
  237: sub end_displaystudentphoto {
  238:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  239:     my @result;
  240:     if ($target eq 'edit') { $result[1]='no'; }
  241:     return @result;
  242: }
  243: 
  244: 1;
  245: __END__