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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Fake question behaviour that is used when the actual behaviour was not
* available.
*
* @package qbehaviour
* @subpackage missing
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Fake question behaviour that is used when the actual behaviour
* is not available.
*
* Imagine, for example, that a quiz attempt has been restored from another
* Moodle site with more behaviours installed, or a behaviour
* that used to be available in this site has been uninstalled. Obviously all we
* can do is have some code to prevent fatal errors.
*
* The approach we take is: The rendering code is still implemented, as far as
* possible. A warning is shown that behaviour specific bits may be missing.
* Any attempt to process anything causes an exception to be thrown.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qbehaviour_missing extends question_behaviour {
public function is_compatible_question(question_definition $question) {
return true;
}
public function summarise_action(question_attempt_step $step) {
return '';
}
public function init_first_step(question_attempt_step $step, $variant) {
throw new coding_exception('The behaviour used for this question is not available. ' .
'No processing is possible.');
}
public function process_action(question_attempt_pending_step $pendingstep) {
throw new coding_exception('The behaviour used for this question is not available. ' .
'No processing is possible.');
}
public function get_min_fraction() {
throw new coding_exception('The behaviour used for this question is not available. ' .
'No processing is possible.');
}
public function get_max_fraction() {
throw new coding_exception('The behaviour used for this question is not available. ' .
'No processing is possible.');
}
}