Add from_dict class method

Add new event types
Add missing attributes

lib/events.py

@@ -1,15 +1,35 @@
 from dataclasses import dataclass
 from typing import Optional, List
 
+from .client import Client
+from .room import Room
 from .content import ContentBase
 
 
 @dataclass
 class EventBase:
+    client: Client
     content: ContentBase
     type: str
     sender: str
 
+    @classmethod
+    def from_dict(cls, client: Client, event_dict: dict):
+        from .content import content_dispatcher
+        if event_dict['type'] == 'm.room.message':
+            content_class = content_dispatcher[event_dict['content']['msgtype']]
+        else:
+            content_class = content_dispatcher[event_dict['type']]
+
+        content_dict = event_dict['content']
+        del event_dict['content']
+
+        return cls(
+            client=client,
+            content=content_class(content_dict),
+            **event_dict
+        )
+
 
 @dataclass
 class UnsignedData:
@@ -21,19 +41,30 @@ class UnsignedData:
 
 @dataclass
 class RoomEvent(EventBase):
-    from .room import Room
     event_id: str
-    origin_server_id: int
+    origin_server_ts: int
     unsigned: UnsignedData
     room: Room
+    user_id: str
 
 
 @dataclass
 class StateEvent(RoomEvent):
     state_key: str
+    age: int
     prev_content: Optional[EventBase] = None
 
 
 @dataclass
 class RedactionEvent(RoomEvent):
     redacts: EventBase
+
+
+@dataclass
+class MessageEvent(RoomEvent):
+    pass
+
+
+@dataclass
+class PresenceEvent(EventBase):
+    pass