feat: expand network connection implementation

tetris/online.py

@@ -1,49 +1,130 @@
 import asyncio
+from os import stat
 import websockets
+import json
+import queue # refer to https://docs.python.org/3/library/queue.html for multi-threading
+from typing import Dict
 from threading import Thread
 
 class MultiplayerService():
     _thread = None
+    _receive_piece_queue = queue.Queue()
+    _send_piece_queue = queue.Queue()
+    _current_game_id = None
 
     @classmethod
-    def init(cls):
+    def init(cls) -> None:
         thread = Thread(target=asyncio.get_event_loop().run_until_complete,\
                         args=(_NetworkConnectionService.init(),))
         thread.start()
 
     @classmethod
-    def quit(cls):
+    def enter_game(cls, game_id: str) -> None:
+        cls._current_game_id = game_id
+        _NetworkConnectionService._join_game = True
+        pass
+
+    @classmethod
+    def send_piece(cls, piece: "PieceDto") -> None:
+        cls._send_piece_queue.put(piece)
+
+    @classmethod
+    def try_receive_piece(cls) -> "PieceDto":
+        return cls._receive_piece_queue.get() if not cls._receive_piece_queue.empty() else None
+
+    @classmethod
+    def quit(cls) -> None:
         _NetworkConnectionService.close_connection()
 
 class _NetworkConnectionService():
+    _URI = "ws://localhost:5001" # TODO get from config file
     _websocket = None
-    _URI = "ws://webapi.tetri5.com"
     _is_closed = False
+    _join_game = False
 
     @classmethod
-    async def init(cls):
+    async def init(cls) -> None:
         await cls._connect_to_server()
         await cls._run_network_loop()
             
     @classmethod
-    def close_connection(cls):
+    def close_connection(cls) -> None:
         cls._is_closed = True
 
     @classmethod
-    async def _run_network_loop(cls):
+    async def _run_network_loop(cls) -> None:
         while True:
-            await asyncio.sleep(16e-3)
-            await cls._websocket.send("ping")
-            print(await cls._websocket.recv())
+            await asyncio.sleep(16e-3) # TODO add clock tick instead 
 
+            await cls._try_enter_game()
+            await cls._try_send_piece()
+            # await cls._try_receive_message()
+
+            # if conection is closed, exit loop
             if cls._is_closed:
                 await cls._websocket.close()
                 break
 
     @classmethod
-    async def _connect_to_server(cls):
-        print("Connecting to server...")
+    async def _try_enter_game(cls) -> None:
+        if not cls._join_game:
+            return
+        
+        json_message = json.dumps({"action": "enter_game", "gameId": MultiplayerService._current_game_id})
+        await cls._websocket.send(json_message)
+
+        json_response = await cls._websocket.recv()
+        print(json_response)       
+
+        cls._join_game = False
+
+    @classmethod
+    async def _try_send_piece(cls) -> None:
+        # if no messages to proccess, return
+        if MultiplayerService._send_piece_queue.empty():
+            return
+        
+        # get next piece to send and send to server
+        piece = MultiplayerService._send_piece_queue.get()
+
+        # construct json message
+        message = {}
+        message["action"] = "send_piece"
+        message["gameId"] = MultiplayerService._current_game_id
+        message["piece"] = piece.__dict__()
+
+        await cls._websocket.send(json.dumps(message))
+
+    @classmethod
+    async def _try_receive_message(cls) -> None:
+        try:
+            async for message in cls._websocket:
+                data = json.loads(message)
+                print(data)
+                # if message type is receive_piece, put it in the receive queue
+                if data["type"] == "receive_piece":
+                    # convert Dict to PieceDto
+                    MultiplayerService._receive_piece_queue.put(PieceDto.create(data["piece"]))
+        finally:
+            pass # TODO handle connection closed exception
+
+    @classmethod
+    async def _connect_to_server(cls) -> None:
+        print("Connecting to server...") # TODO replace with logging
         cls._websocket = await websockets.connect(cls._URI, ping_interval=None)
         # ping_interval=None is important, otherwise the server will disconnect us
         # https://stackoverflow.com/a/58993145/11512104
-        print("Connected to server...")
+        print("Connected to server...") # TODO replace with logging
+
+# DTOs
+
+class PieceDto():
+    def __init__(self, x: int, y: int, type_: str) -> None:
+        self.x = x
+        self.y = y
+        self.type = type_
+        pass
+
+    @staticmethod
+    def create(data: Dict) -> "PieceDto": 
+        return PieceDto(data["x"], data["y"], data["type"])