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<?php
/**
* @package OpenCart
* @author Daniel Kerr
* @copyright Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
* @license https://opensource.org/licenses/GPL-3.0
* @link https://www.opencart.com
*/
/**
* Event class
*
* Event System Userguide
*
* https://github.com/opencart/opencart/wiki/Events-(script-notifications)-2.2.x.x
*/
class Event {
protected $registry;
protected $data = array();
/**
* Constructor
*
* @param object $route
*/
public function __construct($registry) {
$this->registry = $registry;
}
/**
*
*
* @param string $trigger
* @param object $action
* @param int $priority
*/
public function register($trigger, Action $action, $priority = 0) {
$this->data[] = array(
'trigger' => $trigger,
'action' => $action,
'priority' => $priority
);
$sort_order = array();
foreach ($this->data as $key => $value) {
$sort_order[$key] = $value['priority'];
}
array_multisort($sort_order, SORT_ASC, $this->data);
}
/**
*
*
* @param string $event
* @param array $args
*/
public function trigger($event, array $args = array()) {
foreach ($this->data as $value) {
if (preg_match('/^' . str_replace(array('\*', '\?'), array('.*', '.'), preg_quote($value['trigger'], '/')) . '/', $event)) {
$result = $value['action']->execute($this->registry, $args);
if (!is_null($result) && !($result instanceof Exception)) {
return $result;
}
}
}
}
/**
*
*
* @param string $trigger
* @param string $route
*/
public function unregister($trigger, $route) {
foreach ($this->data as $key => $value) {
if ($trigger == $value['trigger'] && $value['action']->getId() == $route) {
unset($this->data[$key]);
}
}
}
/**
*
*
* @param string $trigger
*/
public function clear($trigger) {
foreach ($this->data as $key => $value) {
if ($trigger == $value['trigger']) {
unset($this->data[$key]);
}
}
}
}
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