WIP: on_event instead of constructor and constructor acceppting args

src/message/message.py

@@ -1,16 +1,39 @@
 from update import update
+from browser import window
 
     
 class Message:
+    def __init__(self, *args):
+        self._args = args
+        self.error = None
+        
     def update_model(self, model):
         raise NotImplementedError("This message does not implement update_model method")
     
+    def on_event(self, event):
+        pass
+    
+    def get_arg(self, n, argtype=None):
+        if n > len(self._args):
+            window.console.log("not enough arguments: {} <= {}".format(n, len(self._args)))
+                               
+        result = self._args[n]
+        if argtype is not None:
+            if not type(result) is argtype:
+                window.console.trace("Error type check!")
+                return None
+        
+        return result
+    
+    def add_arg(self, arg):
+        self._args.append(arg)
+    
     def reset(self):
         return True
         
         
 class ClickMessage(Message):
-    def __init__(self, event):
+    def on_event(self, event):
         event.stopPropagation()