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File:  [LON-CAPA] / loncom / homework / bridgetask.pm
Revision 1.1: download - view: text, annotated - select for diffs
Wed Mar 16 19:09:44 2005 UTC (20 years ago) by albertel
Branches: MAIN
CVS tags: HEAD
- can do a very simplistic rendering of a bridge task, doesn't actually implement any of the functionality, just puls it a part, picks the first <Instance> in a <Dimension> and wraps the <Criteria> in a <table> , enough to get started on implementing the proper acces controls logic

# The LearningOnline Network with CAPA 
# definition of tags that give a structure to a document
#
# $Id: bridgetask.pm,v 1.1 2005/03/16 19:09:44 albertel 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::bridgetask; 

use strict;
use Apache::lonnet;
use Apache::File();
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 start_Task {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;

    #&initialize_storage();

    my $status;
    my $accessmsg;

    #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' || $target eq 'grade' || $target eq 'answer' ||
	$target eq 'tex') {
	($status,$accessmsg) = &Apache::lonhomework::check_task_access('0');
	push (@Apache::inputtags::status,$status);
	my $expression='$external::datestatus="'.$status.'";';
	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
	&Apache::run::run($expression,$safeeval);
	&Apache::lonxml::debug("Got $status");
	if (( $status eq 'CLOSED' ) ||
	    ( $status eq 'BANNED') ||
	    ( $status eq 'UNAVAILABLE') ||
	    ( $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;
		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 ne 'NOT_YET_VIEWED') {
		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
		}
		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
		    $msg.='The problem '.$accessmsg;
		}
		$result.=$msg.'<br />';
	    } elsif ($target eq 'tex') {
		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
		if ($status eq 'UNAVAILABLE') {
		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
		} else {
		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
		}
	    }
	} elsif ($target eq 'web') {
	    my $name= &Apache::structuretags::get_resource_name($parstack,$safeeval);
	    $result.="$head_tag_start<title>$name</title></head>
              $body_tag_start \n $form_tag_start".	
	      '<input type="hidden" name="submitted" value="yes" />';
	    # if we are viewing someone else preserve that info
	    if (defined $ENV{'form.grade_symb'}) {
		foreach my $field ('symb','courseid','domain','username') {
		    $result .= '<input type="hidden" name="grade_'.$field.
			'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
		}
	    }
	}
    } else {
	# page_start returned a starting result, delete it if we don't need it
	$result = '';
    }
    return $result;
}

sub end_Task {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    my $result='';
    my $status=$Apache::inputtags::status['-1'];
    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') {
		$result.=&Apache::lonxml::xmlend().'</html>';
	    }
	}
	if ($target eq 'grade') {
	    #&Apache::lonhomework::showhash(%Apache::lonhomework::results);
	    #&finalize_storage();
	}
    } elsif ($target eq 'meta') {
	#$result=&Apache::response::mandatory_part_meta;
	#$result.=&Apache::response::meta_part_order();
	#$result.=&Apache::response::meta_response_order();
    }
    return $result;
}

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;
}

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;
    return '';
}

sub end_Dimension {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    my $result;
    if ($target eq 'web') {
	#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];
	my $result=$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>';
    }
    return $result;
}

sub start_IntroParagraph {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    my $result;
    if ($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;
}

sub end_IntroParagraph {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    my $result;
    if ($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;
    return '';
}

sub end_Instance {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    return '';
}

sub start_InstanceText {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    if ($target eq 'web') {
	&Apache::lonxml::startredirection();
    }
    return '';
}

sub end_InstanceText {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    if ($target eq 'web') {
	$dimension{$instance_id.'.text'}=&Apache::lonxml::endredirection();
    }
    return '';
}

sub start_Criteria {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    if ($target eq 'web') {
	&Apache::lonxml::startredirection();
    }
    return '';
}

sub end_Criteria {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
    if ($target eq 'web') {
	my $criteria=&Apache::lonxml::endredirection();
	my $id=$Apache::lonxml::curdepth;
	$dimension{$instance_id.'.criteria.'.$id}=$criteria;
	push(@{$dimension{$instance_id.'.criterias'}},$id);
    }
    return '';
}

1;
__END__
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