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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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declare(strict_types=1);
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namespace mod_glossary\completion;
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use core_completion\activity_custom_completion;
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/**
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 * Activity custom completion subclass for the glossary activity.
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 *
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 * Class for defining mod_glossary's custom completion rules and fetching the completion statuses
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 * of the custom completion rules for a given glossary instance and a user.
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 *
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 * @package mod_glossary
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 * @copyright Simey Lameze <simey@moodle.com>
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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 custom_completion extends activity_custom_completion {
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    /**
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     * Fetches the completion state for a given completion rule.
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     *
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     * @param string $rule The completion rule.
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     * @return int The completion state.
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     */
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    public function get_state(string $rule): int {
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        global $DB;
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        $this->validate_rule($rule);
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        $glossaryid = $this->cm->instance;
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        $userid = $this->userid;
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        $userentries = $DB->count_records('glossary_entries', ['glossaryid' => $glossaryid, 'userid' => $userid,
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                'approved' => 1]);
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        $completionentries = $this->cm->customdata['customcompletionrules']['completionentries'];
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        return ($completionentries <= $userentries) ? COMPLETION_COMPLETE : COMPLETION_INCOMPLETE;
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    }
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    /**
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     * Fetch the list of custom completion rules that this module defines.
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     *
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     * @return array
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     */
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    public static function get_defined_custom_rules(): array {
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        return ['completionentries'];
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    }
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    /**
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     * Returns an associative array of the descriptions of custom completion rules.
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     *
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     * @return array
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     */
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    public function get_custom_rule_descriptions(): array {
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        $completionentries = $this->cm->customdata['customcompletionrules']['completionentries'] ?? 0;
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        return [
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            'completionentries' => get_string('completiondetail:entries', 'glossary', $completionentries),
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        ];
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    }
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    /**
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     * Returns an array of all completion rules, in the order they should be displayed to users.
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     *
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     * @return array
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     */
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    public function get_sort_order(): array {
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        return [
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            'completionview',
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            'completionentries',
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            'completionusegrade',
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            'completionpassgrade',
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        ];
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    }
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}