Proyectos de Subversion Moodle

<?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/>.

namespace core_ai\cache;

use cache_definition;

/**

 * Cache class for AI policy.

 *

 * @package    core_ai

 * @copyright  2024 Matt Porritt <matt.porritt@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class policy implements \cache_data_source {

    /** @var policy|null the singleton instance of this class. */

    protected static ?policy $instance = null;

    #[\Override]

    public static function get_instance_for_cache(cache_definition $definition): policy {

        if (is_null(self::$instance)) {

            self::$instance = new self();

        }

        return self::$instance;

    }

    #[\Override]

    public function load_for_cache($key) {

        global $DB;

        return $DB->record_exists('ai_policy_register', ['userid' => $key]);

    }

    #[\Override]

    public function load_many_for_cache(array $keys): array {

        global $DB;

        $return = [];

        [$insql, $inparams] = $DB->get_in_or_equal($keys);

        $sql = "SELECT userid

                  FROM {ai_policy_register}

                 WHERE userid " . $insql;

        $results = $DB->get_fieldset_sql($sql, $inparams);

        foreach ($keys as $key) {

            $return[$key] = in_array($key, $results);

        }

        return $return;

    }

}