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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Calculated multiple-choice question definition class.
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*
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* @package qtype
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* @subpackage calculatedmulti
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* @copyright 2011 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/question/type/questionbase.php');
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require_once($CFG->dirroot . '/question/type/multichoice/question.php');
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require_once($CFG->dirroot . '/question/type/calculated/question.php');
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/**
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* Represents a calculated multiple-choice multiple-response question.
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*
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* @copyright 2011 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class qtype_calculatedmulti_single_question extends qtype_multichoice_single_question
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implements qtype_calculated_question_with_expressions {
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/** @var qtype_calculated_dataset_loader helper for loading the dataset. */
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public $datasetloader;
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/** @var qtype_calculated_variable_substituter stores the dataset we are using. */
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public $vs;
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/**
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* @var bool wheter the dataset item to use should be chose based on attempt
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* start time, rather than randomly.
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*/
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public $synchronised;
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public function start_attempt(question_attempt_step $step, $variant) {
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qtype_calculated_question_helper::start_attempt($this, $step, $variant);
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parent::start_attempt($step, $variant);
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}
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public function apply_attempt_state(question_attempt_step $step) {
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qtype_calculated_question_helper::apply_attempt_state($this, $step);
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parent::apply_attempt_state($step);
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}
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public function calculate_all_expressions() {
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qtype_calculatedmulti_calculate_helper::calculate_all_expressions($this);
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}
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public function get_num_variants() {
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return $this->datasetloader->get_number_of_items();
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}
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public function get_variants_selection_seed() {
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if (!empty($this->synchronised) &&
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$this->datasetloader->datasets_are_synchronised($this->category)) {
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return 'category' . $this->category;
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} else {
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return parent::get_variants_selection_seed();
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}
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}
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}
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/**
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* Represents a calculated multiple-choice multiple-response question.
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*
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* @copyright 2011 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class qtype_calculatedmulti_multi_question extends qtype_multichoice_multi_question
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implements qtype_calculated_question_with_expressions {
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/** @var qtype_calculated_dataset_loader helper for loading the dataset. */
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public $datasetloader;
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/** @var qtype_calculated_variable_substituter stores the dataset we are using. */
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public $vs;
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/**
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* @var bool wheter the dataset item to use should be chose based on attempt
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* start time, rather than randomly.
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*/
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public $synchronised;
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public function start_attempt(question_attempt_step $step, $variant) {
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qtype_calculated_question_helper::start_attempt($this, $step, $variant);
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parent::start_attempt($step, $variant);
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}
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public function apply_attempt_state(question_attempt_step $step) {
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qtype_calculated_question_helper::apply_attempt_state($this, $step);
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parent::apply_attempt_state($step);
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}
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public function calculate_all_expressions() {
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qtype_calculatedmulti_calculate_helper::calculate_all_expressions($this);
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}
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public function get_num_variants() {
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return $this->datasetloader->get_number_of_items();
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}
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public function get_variants_selection_seed() {
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if (!empty($this->synchronised) &&
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$this->datasetloader->datasets_are_synchronised($this->category)) {
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return 'category' . $this->category;
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} else {
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return parent::get_variants_selection_seed();
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}
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}
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}
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/**
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* Helper to abstract common code between qtype_calculatedmulti_single_question
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* and qtype_calculatedmulti_multi_question.
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*
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* @copyright 2011 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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abstract class qtype_calculatedmulti_calculate_helper {
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/**
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* Calculate all the exressions in a qtype_calculatedmulti_single_question
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* or qtype_calculatedmulti_multi_question.
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* @param unknown_type $question
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*/
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public static function calculate_all_expressions(
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qtype_calculated_question_with_expressions $question) {
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$question->questiontext = $question->vs->replace_expressions_in_text(
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$question->questiontext);
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$question->generalfeedback = $question->vs->replace_expressions_in_text(
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$question->generalfeedback);
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foreach ($question->answers as $ans) {
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if ($ans->answer && $ans->answer !== '*') {
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$ans->answer = $question->vs->replace_expressions_in_text($ans->answer,
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$ans->correctanswerlength, $ans->correctanswerformat);
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}
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$ans->feedback = $question->vs->replace_expressions_in_text($ans->feedback,
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$ans->correctanswerlength, $ans->correctanswerformat);
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}
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}
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}
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