Use autoload

1 files changed, 69 insertions, 0 deletions

diff --git a/lib/hook.php b/lib/hook.php
new file mode 100644
index 00000000000..08b6d5e8b6b
--- /dev/null
+++ b/lib/hook.php
@@ -0,0 +1,69 @@
+<?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 $signalclass class name of emitter
+	 * @param $signalname name of signal
+	 * @param $slotclass class name of slot
+	 * @param $slotname name of slot
+	 * @returns true/false
+	 *
+	 * This function makes it very easy to connect to use hooks.
+	 *
+	 * TODO: write example
+	 */
+	static public function connect( $signalclass, $signalname, $slotclass, $slotname ){
+		// Cerate the data structure
+		if( !array_key_exists( $signalclass, self::$registered )){
+			self::$registered[$signalclass] = array();
+		}
+		if( !array_key_exists( $signalname, self::$registered[$signalclass] )){
+			self::$registered[$signalclass][$signalname] = array();
+		}
+
+		// register hook
+		self::$registered[$signalclass][$signalname][] = array(
+		  "class" => $slotclass,
+		  "name" => $slotname );
+
+		// No chance for failure ;-)
+		return true;
+	}
+
+	/**
+	 * @brief emitts a signal
+	 * @param $signalclass class name of emitter
+	 * @param $signalname name of signal
+	 * @param $params defautl: array() array with additional data
+	 * @returns 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 there are no slots
+		if( !array_key_exists( $signalclass, self::$registered )){
+			return false;
+		}
+		if( !array_key_exists( $signalname, self::$registered[$signalclass] )){
+			return false;
+		}
+
+		// Call all slots
+		foreach( self::$registered[$signalclass][$signalname] as $i ){
+			call_user_func( array( $i["class"], $i["name"] ), $params );
+		}
+
+		// return true
+		return true;
+	}
+}
+