[feature/system-cron] WIP on reorganizing cron tasks into classes.

PHPBB3-9596

phpBB/includes/cron_tasks/standard/tidy_cache.php

@@ -0,0 +1,53 @@
+<?php
+/**
+*
+* @package phpBB3
+* @version $Id$
+* @copyright (c) 2010 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Tidy cache cron task.
+*
+* @package phpBB3
+*/
+class tidy_cache_cron_task extends cron_task_base
+{
+	/**
+	* Runs this cron task.
+	*/
+	public function run()
+	{
+		global $cache;
+		$cache->tidy();
+	}
+
+	/**
+	* Returns whether this cron task can run, given current board configuration.
+	*/
+	public function is_runnable()
+	{
+		global $cache;
+		return method_exists($cache, 'tidy');
+	}
+
+	/**
+	* Returns whether this cron task should run now, because enough time
+	* has passed since it was last run.
+	*/
+	public function should_run()
+	{
+		global $config;
+		return $config['cache_last_gc'] < time() - $config['cache_gc'];
+	}
+}