1 files changed, 146 insertions, 0 deletions
diff --git a/phpBB/includes/cron/manager.php b/phpBB/includes/cron/manager.php
new file mode 100644
index 0000000000..7a78a1b054
--- /dev/null
+++ b/phpBB/includes/cron/manager.php
@@ -0,0 +1,146 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2010 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Cron manager class.
+*
+* Finds installed cron tasks, stores task objects, provides task selection.
+*
+* @package phpBB3
+*/
+class phpbb_cron_manager
+{
+	/**
+	* Set of phpbb_cron_task_wrapper objects.
+	* Array holding all tasks that have been found.
+	*
+	* @var array
+	*/
+	protected $tasks = array();
+
+	/**
+	* Constructor. Loads all available tasks.
+	*
+	* @param array|Traversable $task_names Provides an iterable set of task names
+	*/
+	public function __construct($task_names)
+	{
+		$this->load_tasks($task_names);
+	}
+
+	/**
+	* Loads tasks given by name, wraps them
+	* and puts them into $this->tasks.
+	*
+	* @param array|Traversable $task_names		Array of strings
+	*
+	* @return void
+	*/
+	public function load_tasks($task_names)
+	{
+		foreach ($task_names as $task_name)
+		{
+			$task = new $task_name();
+			$wrapper = new phpbb_cron_task_wrapper($task);
+			$this->tasks[] = $wrapper;
+		}
+	}
+
+	/**
+	* Finds a task that is ready to run.
+	*
+	* If several tasks are ready, any one of them could be returned.
+	*
+	* If no tasks are ready, null is returned.
+	*
+	* @return phpbb_cron_task_wrapper|null
+	*/
+	public function find_one_ready_task()
+	{
+		foreach ($this->tasks as $task)
+		{
+			if ($task->is_ready())
+			{
+				return $task;
+			}
+		}
+		return null;
+	}
+
+	/**
+	* Finds all tasks that are ready to run.
+	*
+	* @return array		List of tasks which are ready to run (wrapped in phpbb_cron_task_wrapper).
+	*/
+	public function find_all_ready_tasks()
+	{
+		$tasks = array();
+		foreach ($this->tasks as $task)
+		{
+			if ($task->is_ready())
+			{
+				$tasks[] = $task;
+			}
+		}
+		return $tasks;
+	}
+
+	/**
+	* Finds a task by name.
+	*
+	* If there is no task with the specified name, null is returned.
+	*
+	* Web runner uses this method to resolve names to tasks.
+	*
+	* @param string				$name Name of the task to look up.
+	* @return phpbb_cron_task	A task corresponding to the given name, or null.
+	*/
+	public function find_task($name)
+	{
+		foreach ($this->tasks as $task)
+		{
+			if ($task->get_name() == $name)
+			{
+				return $task;
+			}
+		}
+		return null;
+	}
+
+	/**
+	* Creates an instance of parametrized cron task $name with args $args.
+	* The constructed task is wrapped with cron task wrapper before being returned.
+	*
+	* @param string $name		The task name, which is the same as cron task class name.
+	* @param array $args		Will be passed to the task class's constructor.
+	*
+	* @return phpbb_cron_task_wrapper|null
+	*/
+	public function instantiate_task($name, array $args)
+	{
+		$task = $this->find_task($name);
+		if ($task)
+		{
+			// task here is actually an instance of cron task wrapper
+			$class = $task->get_name();
+			$task = new $class($args);
+			// need to wrap the new task too
+			$task = new phpbb_cron_task_wrapper($task);
+		}
+		return $task;
+	}
+}