[ticket/11373] Prune old read notifications with cron

PHPBB3-11373

phpBB/phpbb/cron/task/core/prune_notifications.php

@@ -0,0 +1,75 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Prune notifications cron task.
+*
+* @package phpBB3
+*/
+class phpbb_cron_task_core_prune_notifications extends phpbb_cron_task_base
+{
+	protected $config;
+	protected $notification_manager;
+
+	/**
+	* Constructor.
+	*
+	* @param phpbb_config $config The config
+	* @param phpbb_notification_manager $notification_manager Notification manager
+	*/
+	public function __construct(phpbb_config $config, phpbb_notification_manager $notification_manager)
+	{
+		$this->config = $config;
+		$this->notification_manager = $notification_manager;
+	}
+
+	/**
+	* Runs this cron task.
+	*
+	* @return null
+	*/
+	public function run()
+	{
+		// time minus expire days in seconds
+		$timestamp = time() - ($this->config['read_notification_expire_days'] * 60 * 60 * 24);
+		$this->notification_manager->prune_notifications($timestamp);
+	}
+
+	/**
+	* Returns whether this cron task can run, given current board configuration.=
+	*
+	* @return bool
+	*/
+	public function is_runnable()
+	{
+		return (bool) $this->config['read_notification_expire_days'];
+	}
+
+	/**
+	* Returns whether this cron task should run now, because enough time
+	* has passed since it was last run.
+	*
+	* The interval between prune notifications is specified in board
+	* configuration.
+	*
+	* @return bool
+	*/
+	public function should_run()
+	{
+		return $this->config['read_notification_last_gc'] < time() - $this->config['read_notification_gc'];
+	}
+}