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question.php
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question.php
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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/>.
/**
* Calculated multiple-choice question definition class.
*
* @package qtype
* @subpackage calculatedmulti
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot . '/question/type/multichoice/question.php');
require_once($CFG->dirroot . '/question/type/calculated/question.php');
/**
* Represents a calculated multiple-choice multiple-response question.
*
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qtype_calculatedmulti_single_question extends qtype_multichoice_single_question
implements qtype_calculated_question_with_expressions {
/** @var qtype_calculated_dataset_loader helper for loading the dataset. */
public $datasetloader;
/** @var qtype_calculated_variable_substituter stores the dataset we are using. */
public $vs;
/**
* @var bool wheter the dataset item to use should be chose based on attempt
* start time, rather than randomly.
*/
public $synchronised;
public function start_attempt(question_attempt_step $step, $variant) {
qtype_calculated_question_helper::start_attempt($this, $step, $variant);
parent::start_attempt($step, $variant);
}
public function apply_attempt_state(question_attempt_step $step) {
qtype_calculated_question_helper::apply_attempt_state($this, $step);
parent::apply_attempt_state($step);
}
public function calculate_all_expressions() {
qtype_calculatedmulti_calculate_helper::calculate_all_expressions($this);
}
public function get_num_variants() {
return $this->datasetloader->get_number_of_items();
}
public function get_variants_selection_seed() {
if (!empty($this->synchronised) &&
$this->datasetloader->datasets_are_synchronised($this->category)) {
return 'category' . $this->category;
} else {
return parent::get_variants_selection_seed();
}
}
}
/**
* Represents a calculated multiple-choice multiple-response question.
*
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qtype_calculatedmulti_multi_question extends qtype_multichoice_multi_question
implements qtype_calculated_question_with_expressions {
/** @var qtype_calculated_dataset_loader helper for loading the dataset. */
public $datasetloader;
/** @var qtype_calculated_variable_substituter stores the dataset we are using. */
public $vs;
/**
* @var bool wheter the dataset item to use should be chose based on attempt
* start time, rather than randomly.
*/
public $synchronised;
public function start_attempt(question_attempt_step $step, $variant) {
qtype_calculated_question_helper::start_attempt($this, $step, $variant);
parent::start_attempt($step, $variant);
}
public function apply_attempt_state(question_attempt_step $step) {
qtype_calculated_question_helper::apply_attempt_state($this, $step);
parent::apply_attempt_state($step);
}
public function calculate_all_expressions() {
qtype_calculatedmulti_calculate_helper::calculate_all_expressions($this);
}
}
/**
* Helper to abstract common code between qtype_calculatedmulti_single_question
* and qtype_calculatedmulti_multi_question.
*
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class qtype_calculatedmulti_calculate_helper {
/**
* Calculate all the exressions in a qtype_calculatedmulti_single_question
* or qtype_calculatedmulti_multi_question.
* @param unknown_type $question
*/
public static function calculate_all_expressions(
qtype_calculated_question_with_expressions $question) {
$question->questiontext = $question->vs->replace_expressions_in_text(
$question->questiontext);
$question->generalfeedback = $question->vs->replace_expressions_in_text(
$question->generalfeedback);
foreach ($question->answers as $ans) {
if ($ans->answer && $ans->answer !== '*') {
$ans->answer = $question->vs->replace_expressions_in_text($ans->answer,
$ans->correctanswerlength, $ans->correctanswerformat);
}
$ans->feedback = $question->vs->replace_expressions_in_text($ans->feedback,
$ans->correctanswerlength, $ans->correctanswerformat);
}
}
}