109 lines
2.9 KiB
PHP
109 lines
2.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* This class manages the hooks. It basically provides two functions: adding
|
|
* slots and emitting signals.
|
|
*/
|
|
class OC_Hook{
|
|
static private $registered = array();
|
|
|
|
/**
|
|
* @brief connects a function to a hook
|
|
* @param string $signalclass class name of emitter
|
|
* @param string $signalname name of signal
|
|
* @param string $slotclass class name of slot
|
|
* @param string $slotname name of slot
|
|
* @return bool
|
|
*
|
|
* This function makes it very easy to connect to use hooks.
|
|
*
|
|
* TODO: write example
|
|
*/
|
|
static public function connect( $signalclass, $signalname, $slotclass, $slotname ) {
|
|
// If we're trying to connect to an emitting class that isn't
|
|
// yet registered, register it
|
|
if( !array_key_exists( $signalclass, self::$registered )) {
|
|
self::$registered[$signalclass] = array();
|
|
}
|
|
// If we're trying to connect to an emitting method that isn't
|
|
// yet registered, register it with the emitting class
|
|
if( !array_key_exists( $signalname, self::$registered[$signalclass] )) {
|
|
self::$registered[$signalclass][$signalname] = array();
|
|
}
|
|
|
|
// Connect the hook handler to the requested emitter
|
|
self::$registered[$signalclass][$signalname][] = array(
|
|
"class" => $slotclass,
|
|
"name" => $slotname
|
|
);
|
|
|
|
// No chance for failure ;-)
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief emits a signal
|
|
* @param string $signalclass class name of emitter
|
|
* @param string $signalname name of signal
|
|
* @param array $params default: array() array with additional data
|
|
* @return bool, true if slots exists or false if not
|
|
*
|
|
* Emits a signal. To get data from the slot use references!
|
|
*
|
|
* TODO: write example
|
|
*/
|
|
static public function emit( $signalclass, $signalname, $params = array()) {
|
|
|
|
// Return false if no hook handlers are listening to this
|
|
// emitting class
|
|
if( !array_key_exists( $signalclass, self::$registered )) {
|
|
return false;
|
|
}
|
|
|
|
// Return false if no hook handlers are listening to this
|
|
// emitting method
|
|
if( !array_key_exists( $signalname, self::$registered[$signalclass] )) {
|
|
return false;
|
|
}
|
|
|
|
// Call all slots
|
|
foreach( self::$registered[$signalclass][$signalname] as $i ) {
|
|
try {
|
|
call_user_func( array( $i["class"], $i["name"] ), $params );
|
|
} catch (Exception $e){
|
|
OC_Log::write('hook',
|
|
'error while running hook (' . $i["class"] . '::' . $i["name"] . '): '.$e->getMessage(),
|
|
OC_Log::ERROR);
|
|
}
|
|
}
|
|
|
|
// return true
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* clear hooks
|
|
* @param string $signalclass
|
|
* @param string $signalname
|
|
*/
|
|
static public function clear($signalclass='', $signalname='') {
|
|
if($signalclass) {
|
|
if($signalname) {
|
|
self::$registered[$signalclass][$signalname]=array();
|
|
}else{
|
|
self::$registered[$signalclass]=array();
|
|
}
|
|
}else{
|
|
self::$registered=array();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* DO NOT USE!
|
|
* For unit tests ONLY!
|
|
*/
|
|
static public function getHooks() {
|
|
return self::$registered;
|
|
}
|
|
}
|