100 lines
2.3 KiB
PHP
100 lines
2.3 KiB
PHP
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<?php
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$hooks = array();
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/**
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* Registered a hook on a specific event
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*
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* @param[in] $event string The event name
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* @param[in] $callable callable The callable to run on event
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* @param[in] $param mixed Paremeter that will be pass to the callable
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* Use an array if you have multiple parameters to pass
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*
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* @retval void
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*/
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function register_hook($event, $callable, $param=NULL) {
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global $hooks;
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if (!array_key_exists($event, $hooks))
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$hooks[$event] = array();
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$hooks[$event][] = array (
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'callable' => $callable,
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'param' => $param,
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);
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}
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/**
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* Run triggered actions on specific event
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*
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* @param[in] $event string Event name
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*
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* @retval boolean True if all triggered actions succefully runned, false otherwise
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*/
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function trigger_hook($event_name, $event_data=null) {
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global $hooks;
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$return = true;
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if (isset($hooks[$event_name]) && is_array($hooks[$event_name])) {
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if ($event_name == 'all')
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$event = new Event($event_data['event_name'], $event_data['event_data']);
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else
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$event = new Event($event_name, $event_data);
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foreach ($hooks[$event_name] as $e) {
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if (is_callable($e['callable'])) {
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try {
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call_user_func_array($e['callable'],array($event, &$e['param']));
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}
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catch(Exception $e) {
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logException($e, "An exception occured running hook ".format_callable($e['callable'])." on event $event_name");
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$return = false;
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}
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}
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else {
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logging('ERROR', "The hook ".format_callable($e['callable'])." on event $event_name is not callable.");
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$return = false;
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}
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}
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}
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else
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logging('DEBUG', "No hook registered for event $event_name.");
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// Handle 'all' event
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if ($event_name != 'all') {
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trigger_hook (
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'all',
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array (
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'event_name' => $event_name,
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'event_data' => $event_data,
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)
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);
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}
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return $return;
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}
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class Event implements JsonSerializable {
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private $name;
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private $data;
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function __construct($name, $data) {
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$this -> name = $name;
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$this -> data = $data;
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}
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function __get($key) {
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if ($key == 'name')
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return $this -> name;
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elseif ($key == 'data')
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return $this -> data;
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elseif (is_array($this -> data) && array_key_exists($key, $this -> data))
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return $this -> data[$key];
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return null;
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}
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public function jsonSerialize() {
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return array (
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'name' => $this -> name,
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'data' => $this -> data,
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);
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}
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}
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