1 files changed, 107 insertions, 0 deletions
diff --git a/codebase/Dhtmlx/Connector/Tools/EventMaster.php b/codebase/Dhtmlx/Connector/Tools/EventMaster.php
new file mode 100644
index 0000000..ec849d8
--- /dev/null
+++ b/codebase/Dhtmlx/Connector/Tools/EventMaster.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace DHTMLX\Connector\Tools;
+/*! Class which allows to assign|fire events.
+*/
+class EventMaster{
+    private $events;//!< hash of event handlers
+    private $master;
+    private static $eventsStatic=array();
+
+    /*! constructor
+    */
+    function __construct(){
+        $this->events=array();
+        $this->master = false;
+    }
+    /*! Method check if event with such name already exists.
+        @param name
+            name of event, case non-sensitive
+        @return
+            true if event with such name registered, false otherwise
+    */
+    public function exist($name){
+        $name=strtolower($name);
+        return (isset($this->events[$name]) && sizeof($this->events[$name]));
+    }
+    /*! Attach custom code to event.
+
+        Only on event handler can be attached in the same time. If new event handler attached - old will be detached.
+
+        @param name
+            name of event, case non-sensitive
+        @param method
+            function which will be attached. You can use array(class, method) if you want to attach the method of the class.
+    */
+    public function attach($name,$method=false){
+        //use class for event handling
+        if ($method === false){
+            $this->master = $name;
+            return;
+        }
+        //use separate functions
+        $name=strtolower($name);
+        if (!array_key_exists($name,$this->events))
+            $this->events[$name]=array();
+        $this->events[$name][]=$method;
+    }
+
+    public static function attach_static($name, $method){
+        $name=strtolower($name);
+        if (!array_key_exists($name,EventMaster::$eventsStatic))
+            EventMaster::$eventsStatic[$name]=array();
+        EventMaster::$eventsStatic[$name][]=$method;
+    }
+
+    public static function trigger_static($name, $method){
+        $arg_list = func_get_args();
+        $name=strtolower(array_shift($arg_list));
+
+        if (isset(EventMaster::$eventsStatic[$name]))
+            foreach(EventMaster::$eventsStatic[$name] as $method){
+                if (is_array($method) && !method_exists($method[0],$method[1]))
+                    throw new Exception("Incorrect method assigned to event: ".$method[0].":".$method[1]);
+                if (!is_array($method) && !function_exists($method))
+                    throw new Exception("Incorrect function assigned to event: ".$method);
+                call_user_func_array($method, $arg_list);
+            }
+        return true;
+    }
+
+    /*! Detach code from event
+        @param	name
+            name of event, case non-sensitive
+    */
+    public function detach($name){
+        $name=strtolower($name);
+        unset($this->events[$name]);
+    }
+    /*! Trigger event.
+        @param	name
+            name of event, case non-sensitive
+        @param data
+            value which will be provided as argument for event function,
+            you can provide multiple data arguments, method accepts variable number of parameters
+        @return
+            true if event handler was not assigned , result of event hangler otherwise
+    */
+    public function trigger($name,$data){
+        $arg_list = func_get_args();
+        $name=strtolower(array_shift($arg_list));
+
+        if (isset($this->events[$name]))
+            foreach($this->events[$name] as $method){
+                if (is_array($method) && !method_exists($method[0],$method[1]))
+                    throw new Exception("Incorrect method assigned to event: ".$method[0].":".$method[1]);
+                if (!is_array($method) && !function_exists($method))
+                    throw new Exception("Incorrect function assigned to event: ".$method);
+                call_user_func_array($method, $arg_list);
+            }
+
+        if ($this->master !== false)
+            if (method_exists($this->master, $name))
+                call_user_func_array(array($this->master, $name), $arg_list);
+
+        return true;
+    }
+}
+\ No newline at end of file