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<?php
/**
*
* @package phpBB3
* @copyright (c) 2010 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
namespace phpbb\cron;
/**
* Cron manager class.
*
* Finds installed cron tasks, stores task objects, provides task selection.
*
* @package phpBB3
*/
class manager
{
/**
* Set of \phpbb\cron\task\wrapper objects.
* Array holding all tasks that have been found.
*
* @var array
*/
protected $tasks = array();
protected $phpbb_root_path;
protected $php_ext;
/**
* Constructor. Loads all available tasks.
*
* @param array|Traversable $tasks Provides an iterable set of task names
*/
public function __construct($tasks, $phpbb_root_path, $php_ext)
{
$this->phpbb_root_path = $phpbb_root_path;
$this->php_ext = $php_ext;
$this->load_tasks($tasks);
}
/**
* Loads tasks given by name, wraps them
* and puts them into $this->tasks.
*
* @param array|Traversable $tasks Array of instances of \phpbb\cron\task\task
*
* @return null
*/
public function load_tasks($tasks)
{
foreach ($tasks as $task)
{
$this->tasks[] = $this->wrap_task($task);
}
}
/**
* 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 $name Name of the task to look up.
* @return \phpbb\cron\task\task A task corresponding to the given name, or null.
*/
public function find_task($name)
{
foreach ($this->tasks as $task)
{
if ($task->get_name() == $name)
{
return $task;
}
}
return null;
}
/**
* Wraps a task inside an instance of \phpbb\cron\task\wrapper.
*
* @param \phpbb\cron\task\task $task The task.
* @return \phpbb\cron\task\wrapper The wrapped task.
*/
public function wrap_task(\phpbb\cron\task\task $task)
{
return new \phpbb\cron\task\wrapper($task, $this->phpbb_root_path, $this->php_ext);
}
}
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