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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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namespace qbank_statistics\columns;
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use core_question\local\bank\column_base;
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/**
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* This columns shows a message about whether this question is OK or needs revision.
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*
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* This is based on the average discrimination index.
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*
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* @package qbank_statistics
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* @copyright 2021 Catalyst IT Australia Pty Ltd
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* @author Nathan Nguyen <nathannguyen@catalyst-au.net>
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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 discrimination_index extends column_base {
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public function get_title(): string {
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return get_string('discrimination_index', 'qbank_statistics');
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}
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public function help_icon(): ?\help_icon {
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return new \help_icon('discrimination_index', 'qbank_statistics');
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}
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public function get_name(): string {
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return 'discrimination_index';
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}
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public function get_required_statistics_fields(): array {
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return ['discriminationindex'];
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}
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protected function display_content($question, $rowclasses) {
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global $PAGE;
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$discriminationindex = $this->qbank->get_aggregate_statistic($question->id, 'discriminationindex');
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echo $PAGE->get_renderer('qbank_statistics')->render_discrimination_index($discriminationindex);
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}
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public function display_preview(\stdClass $question, string $rowclasses): void {
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global $PAGE;
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$this->display_start($question, $rowclasses);
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echo $PAGE->get_renderer('qbank_statistics')->render_discrimination_index(50.00);
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$this->display_end($question, $rowclasses);;
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}
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public function get_extra_classes(): array {
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return ['pr-3'];
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}
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}
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