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    1: # The LearningOnline Network with CAPA
    2: # external style responses
    3: #
    4: # $Id: externalresponse.pm,v 1.5 2005/10/18 13:58:12 albertel 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: # 1/26 Guy
   29: package Apache::externalresponse;
   30: use strict;
   31: use HTTP::Request::Common;
   32: use Apache::loncapagrade;
   33: use Apache::lonnet;
   34: 
   35: BEGIN {
   36:     &Apache::lonxml::register('Apache::externalresponse',('externalresponse'));
   37: }
   38: 
   39: #FIXME
   40: # send of response params and there current values
   41: # accept a string to be printed out (Where does it get shown?) (.message)
   42: # need to get a correct answer from somewhere (probably here since randomized)
   43: sub start_externalresponse {
   44:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   45:     my $result;
   46:     my $id = &Apache::response::start_response($parstack,$safeeval);
   47:     return $result;
   48: }
   49: 
   50: sub end_externalresponse {
   51:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   52:     my $result;
   53:     if ($target eq 'grade') {
   54: 	if ( defined $env{'form.submitted'}) {
   55: 	    my $id = $Apache::inputtags::response['-1'];
   56: 	    my $response = $env{'form.HWVAL_'.$id};
   57: 	    if ( $response =~ /[^\s]/) {
   58: 		my $url = &Apache::lonxml::get_param('url',$parstack,$safeeval);
   59: 		my $answer = &Apache::lonxml::get_param('answer',$parstack,$safeeval);
   60: 		my %form = &Apache::lonxml::get_param_var('form',$parstack,$safeeval);
   61: 		$form{'LONCAPA_student_response'}=$response;
   62: 		$form{'LONCAPA_correct_answer'}=$answer;
   63: 		$form{'LONCAPA_language'}=
   64: 		    &Apache::lonnet::metadata($ENV{'REQUEST_URI'},'language');
   65: 		&Apache::lonxml::debug("Asking $url, with:");
   66: 		&Apache::lonhomework::showhash(%form);
   67: 		my $ua = LWP::UserAgent->new;
   68: 		my $res = $ua->request(POST $url, \%form);
   69: 		my $partid = $Apache::inputtags::part;
   70: 		my $id = $Apache::inputtags::response['-1'];
   71: 		my %previous = &Apache::response::check_for_previous($response,
   72: 								     $partid,$id);
   73: 		%Apache::loncapagrade::results=();
   74: 		if ($res->{_rc} != '200') {
   75: 		    $Apache::loncapagrade::results{'awardetail'}='ERROR';
   76: 		} else {
   77: 		    &Apache::lonxml::register('Apache::loncapagrade',('loncapagrade'));
   78: 		    my $result=&Apache::scripttag::xmlparse($res->{_content});
   79: 		    &Apache::lonxml::debug("Got a result of :$result:");
   80: 		}
   81: 		foreach my $key (%Apache::loncapagrade::results) {
   82: 		    $Apache::lonhomework::results{"resource.$partid.$id.$key"}=
   83: 			$Apache::loncapagrade::results{$key};
   84: 		}
   85: 		&Apache::response::handle_previous(\%previous,
   86: 						   $Apache::loncapagrade::results{'awarddetail'});
   87: 		&Apache::lonxml::debug("response of");
   88: 		&Apache::lonhomework::showhash(%$res);
   89: 		&Apache::lonhomework::showhash(%Apache::loncapagrade::results);
   90: 	    }
   91: 	}
   92:     }
   93:     &Apache::response::end_response;
   94:     return $result;
   95: }
   96: 
   97: 1;
   98: __END__
   99: 
  100: