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Bug #6452: partial correctness from externalresponse

    1: # The LearningOnline Network with CAPA
    2: # external style responses
    3: #
    4: # $Id: externalresponse.pm,v 1.19 2011/04/29 00:32:08 www 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: 
   30: 
   31: package Apache::externalresponse;
   32: use strict;
   33: use HTTP::Request::Common;
   34: use Apache::loncapagrade;
   35: use Apache::lonnet;
   36: use Apache::lonlocal;
   37: 
   38: BEGIN {
   39:     &Apache::lonxml::register('Apache::externalresponse',('externalresponse'));
   40: }
   41: 
   42: =pod
   43: 
   44: =head1 FIXME (start_externalresponse)
   45: 
   46: send of response params and their current values (form good enough? what parameters to send?)
   47: Need to get returned message displayed
   48: 
   49: =cut
   50: 
   51: 
   52: sub start_externalresponse {
   53:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   54:     my $result;
   55:     my $id = &Apache::response::start_response($parstack,$safeeval);
   56: 
   57:     if ($target eq 'edit') {
   58:   	$result .=&Apache::edit::tag_start($target,$token);
   59: 	$result .=&Apache::edit::text_arg('URL:','url',$token,60).'<br />';
   60: 	$result .=&Apache::edit::text_arg(&mt('Answer:'),'answer',$token);
   61: 	$result .=&Apache::edit::text_arg(&mt('Form:'),'form',$token).'<br />';
   62:         $result .=&Apache::edit::text_arg(&mt('Answer display:'),'answerdisplay',$token,80);
   63: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
   64:     } elsif ($target eq 'modified') {
   65: 	my $constructtag =
   66: 	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
   67: 					'answerdisplay','answer','form','url');
   68: 	if ($constructtag) {
   69: 	    $result = &Apache::edit::rebuild_tag($token);
   70: 	}
   71:     } elsif ($target eq 'meta') {
   72:   	$result=&Apache::response::meta_package_write('externalresponse');
   73:     }
   74:     
   75:     return $result;
   76: }
   77: 
   78: sub end_externalresponse {
   79:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   80:     my $result;
   81:     my $part=$Apache::inputtags::part;
   82:     my $id = $Apache::inputtags::response['-1'];
   83:     my $increment     = 1;
   84:     if ($target eq 'grade') {
   85: 	if (  &Apache::response::submitted('scantron') ) {
   86: 	    my $increment=&Apache::response::scored_response($part,$id);
   87: 	} elsif ( &Apache::response::submitted() ) {
   88: 	    my $response = &Apache::response::getresponse();
   89: 	    if ( $response =~ /[^\s]/) {
   90: 		my $url = &Apache::lonxml::get_param('url',$parstack,$safeeval);
   91: 		my $answer = &Apache::lonxml::get_param('answer',$parstack,$safeeval);
   92: 		my %form = &Apache::lonxml::get_param_var('form',$parstack,$safeeval);
   93: 		$form{'LONCAPA_student_response'}=$response;
   94: 		$form{'LONCAPA_correct_answer'}=$answer;
   95: 		$form{'LONCAPA_language'}=
   96: 		    &Apache::lonnet::metadata($ENV{'REQUEST_URI'},'language');
   97: 		&Apache::lonxml::debug("Asking $url, with:");
   98: 		&Apache::lonhomework::showhash(%form);
   99: 		my $ua = LWP::UserAgent->new;
  100: 		my $res = $ua->request(POST $url, \%form);
  101: 		my %previous = &Apache::response::check_for_previous($response,
  102: 								     $part,$id);
  103: 		%Apache::loncapagrade::results=();
  104: 		$Apache::lonhomework::results{"resource.$part.$id.submission"}=$response;
  105: 		if ($res->is_error()) {
  106: 		    $Apache::loncapagrade::results{'awarddetail'}='ERROR';
  107: 		} else {
  108: 		    &Apache::lonxml::register('Apache::loncapagrade',
  109: 					      ('loncapagrade'));
  110: 		    @Apache::scripttag::parser_env = @_;
  111: 		    my $result=&Apache::scripttag::xmlparse($res->{_content});
  112: 		    &Apache::lonxml::debug("Got a result of :$result:");
  113: 		}
  114: 		foreach my $key (keys(%Apache::loncapagrade::results)) {
  115: 		    $Apache::lonhomework::results{"resource.$part.$id.$key"}=
  116: 			$Apache::loncapagrade::results{$key};
  117: 		}
  118:                 $Apache::externalresponse::message=$Apache::loncapagrade::results{'message'};
  119: 		&Apache::response::handle_previous(\%previous,
  120: 						   $Apache::loncapagrade::results{'awarddetail'});
  121:                 if ($Apache::loncapagrade::results{'awarddetail'} eq 'ASSIGNED_SCORE') {
  122:                    $Apache::lonhomework::results{"resource.$part.$id.awarded"}=
  123:                         1.*$Apache::loncapagrade::results{"awarded"};
  124:                 }
  125: 		&Apache::lonxml::debug("response of");
  126: 		&Apache::lonhomework::showhash(%$res);
  127: 		&Apache::lonxml::debug("capagrade of");
  128: 		&Apache::lonhomework::showhash(%Apache::loncapagrade::results);
  129: 		&Apache::lonxml::debug("results of");
  130: 		&Apache::lonhomework::showhash(%Apache::lonhomework::results);
  131: 	    }
  132: 	}
  133:     }
  134:     if ($target eq 'web') {
  135: 	&Apache::response::setup_prior_tries_hash(\&format_prior_response);
  136:         if (&Apache::response::show_answer()) {
  137:            $result.='<table border="1"><tr><th>'.&mt('Your answer:').'</th></tr><tr><td><pre>'.
  138:                     $Apache::lonhomework::history{"resource.$part.$id.submission"}.
  139:                     '</pre></td></table><br />'.&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval).
  140:                     '<br />';
  141:         }
  142:         if ($Apache::externalresponse::message) {
  143:            $result.='<br /><table><tr><td bgcolor="#FFFFAA">'.$Apache::externalresponse::message.'</td></tr></table><br />';
  144:         }
  145:         $Apache::externalresponse::message='';
  146:     }
  147: 
  148:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
  149: 	$target eq 'tex' || $target eq 'analyze') {
  150: 	&Apache::lonxml::increment_counter($increment, "$part.$id");
  151: 
  152: 	if ($target eq 'analyze') {
  153:             $Apache::lonhomework::analyze{"$part.$id.type"} = 'externalresponse';
  154: 	    &Apache::lonhomework::set_bubble_lines();
  155: 	}
  156:     }
  157:     &Apache::response::end_response();
  158:     return $result;
  159: }
  160: 
  161: sub format_prior_response {
  162:     my ($mode,$answer) =@_;
  163:     return '<span class="LC_prior_external">'.
  164: 	    &HTML::Entities::encode($answer,'"<>&').'</span>';
  165: }
  166: 
  167: 1;
  168: __END__
  169: 
  170: 
  171: =pod
  172: 
  173: =head1 NAME
  174: 
  175: Apache::externalresponse.pm
  176: 
  177: =head1 SYNOPSIS
  178: 
  179: Handler to evaluate externally graded responses.
  180: 
  181: This is part of the LearningOnline Network with CAPA project
  182: described at http://www.lon-capa.org.
  183: 
  184: =head1 SUBROUTINES
  185: 
  186: =over
  187: 
  188: =item start_externalresponse()
  189: 
  190: =item end_externalresponse()
  191: 
  192: =item format_prior_response()
  193: 
  194: =back
  195: 
  196: =cut