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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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* A dummy datasource which supports versioning.
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*
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* @package core_cache
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* @copyright 2021 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 cache_phpunit_dummy_datasource_versionable extends cache_phpunit_dummy_datasource
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implements cache_data_source_versionable {
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/** @var array Data in cache */
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protected $data = [];
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/** @var cache_phpunit_dummy_datasource_versionable Last created instance */
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protected static $lastinstance;
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/**
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* Returns an instance of this object for use with the cache.
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*
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* @param cache_definition $definition
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* @return cache_phpunit_dummy_datasource New object
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*/
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public static function get_instance_for_cache(cache_definition $definition):
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cache_phpunit_dummy_datasource_versionable {
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self::$lastinstance = new cache_phpunit_dummy_datasource_versionable();
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return self::$lastinstance;
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}
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/**
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* Gets the last instance that was created.
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*
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* @return cache_phpunit_dummy_datasource_versionable
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*/
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public static function get_last_instance(): cache_phpunit_dummy_datasource_versionable {
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return self::$lastinstance;
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}
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/**
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* Sets up the datasource so that it has a value for a particular key.
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*
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* @param string $key Key
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* @param int $version Version for key
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* @param mixed $data
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*/
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public function has_value(string $key, int $version, $data): void {
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$this->data[$key] = new \core_cache\version_wrapper($data, $version);
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}
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/**
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* Loads versioned data.
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*
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* @param int|string $key Key
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* @param int $requiredversion Minimum version number
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* @param mixed $actualversion Should be set to the actual version number retrieved
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* @return mixed Data retrieved from cache or false if none
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*/
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public function load_for_cache_versioned($key, int $requiredversion, &$actualversion) {
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if (!array_key_exists($key, $this->data)) {
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return false;
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}
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$value = $this->data[$key];
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if ($value->version < $requiredversion) {
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return false;
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}
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$actualversion = $value->version;
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return $value->data;
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}
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}
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