feat: build server connection backbone

tetris/backend.py

@@ -1,8 +0,0 @@
-from signalrcore.hub_connection_builder import HubConnectionBuilder
-
-server_url = "https://tetriscloneapp.azurewebsites.net/player"
-hub_connection = HubConnectionBuilder()\
-    .with_url(server_url)\
-    .build()
-    
-hub_connection.send("EnterGame", ["abc123"], lambda m: print(m))

tetris/game.py

@@ -6,6 +6,7 @@ from tetris.util import TextGenerator
 from tetris.entity import PieceGenerator 
 from tetris.entity import Well
 from tetris.entity import Stack
+from tetris.online import OnlineService
 
 # TODO should be a singleton and refactor the whole file?
 class Game:
@@ -23,6 +24,7 @@ class Game:
 
     def initialize(self) -> None:
         pygame.init()
+        OnlineService.init()
         TextGenerator.load(ConfigurationManager.get("image", "font"), (20, 20))
 
         win_width = ConfigurationManager.get("window", "width")
@@ -45,11 +47,13 @@ class Game:
 
         main_music_file = ConfigurationManager.get("sound", "main-music")
         self.main_music.set_volume(0.7) # TODO add volume to the config
-        self.main_music.play(mixer.Sound(main_music_file), -1)
+        #self.main_music.play(mixer.Sound(main_music_file), -1)
 
     # gets called from the games main loop
     def update(self) -> None:
         # TODO write not initialized exception
+        OnlineService.update()
+
         elapsed_time = self.clock.tick(self.fps)
 
         if not self.next_piece:
@@ -65,6 +69,8 @@ class Game:
                 pygame.quit()
                 sys.exit()
 
+        OnlineService.ping_server()
+
         if self.stack:
             self.stack.update(elapsed_time, self)
 

tetris/online.py

@@ -0,0 +1,39 @@
+import asyncio
+import websockets
+from threading import Thread
+
+class OnlineService():
+    _URI = "ws://localhost:5001" # TODO remove hardcoded URI and add to config file
+    _TIMEOUT = 5 / 1000 # Timeout in seconds
+    _websocket = None
+    _thread = None
+
+    @classmethod
+    def init(cls):
+        thread = Thread(target=asyncio.get_event_loop().run_until_complete, args=(cls._connect_to_server(),))
+        cls._thread_pool.append(thread)
+        thread.start()
+
+    @classmethod
+    def update(cls):
+        cls._thread_pool = list(filter(lambda t: t.is_alive(), cls._thread_pool))
+
+    @classmethod
+    async def _connect_to_server(cls):
+        print("Connecting to server...")
+        cls._websocket = await websockets.connect(cls._URI)
+        print("Connected to server...")
+
+    @classmethod
+    def ping_server(cls):
+        thread = Thread(target=asyncio.get_event_loop().run_until_complete, args=(cls._ping_server(),))
+        cls._thread_pool.append(thread)
+        thread.start()
+
+    @classmethod
+    async def _ping_server(cls):
+        if cls._websocket is not None:
+            await cls._websocket.send("ping")
+
+# IDEAS
+# Create running ONE thread that handles requests and reponses to the server in one running loop