AI generated first iteration

app/twitch/eventsub.py

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+"""Twitch EventSub client for handling stream events."""
+
+import logging
+from typing import Callable, Optional
+
+logger = logging.getLogger(__name__)
+
+
+class TwitchEventSubClient:
+    """
+    Client for Twitch EventSub WebSocket connections.
+    
+    Handles real-time stream events like chat messages, follows, raids, etc.
+    
+    TODO: Implement real OAuth 2.0 token exchange flow
+    TODO: Implement WebSocket connection to Twitch EventSub
+    TODO: Handle subscription management (follow, subscribe, cheer, raid events)
+    TODO: Implement heartbeat and reconnection logic
+    """
+
+    def __init__(self, client_id: str, access_token: str):
+        """
+        Initialize EventSub client.
+        
+        Args:
+            client_id: Twitch application client ID
+            access_token: OAuth token for API calls
+        """
+        self.client_id = client_id
+        self.access_token = access_token
+        self.connected = False
+        self.event_handlers: dict[str, Callable] = {}
+
+    async def connect(self, channel_id: str) -> bool:
+        """
+        Establish WebSocket connection to Twitch EventSub.
+        
+        Args:
+            channel_id: Twitch channel ID to monitor
+            
+        Returns:
+            True if connection successful
+            
+        TODO: Implement WebSocket handshake
+        TODO: Subscribe to stream.online, stream.offline
+        """
+        logger.info(f"Attempting to connect to EventSub for channel {channel_id}")
+        self.connected = True
+        return True
+
+    async def disconnect(self) -> None:
+        """
+        Close EventSub connection gracefully.
+        
+        TODO: Send close frame to WebSocket
+        TODO: Clean up subscriptions
+        """
+        logger.info("Disconnecting from EventSub")
+        self.connected = False
+
+    async def listen(self) -> None:
+        """
+        Listen for incoming EventSub events (blocking call).
+        
+        Should run in a background task and emit events to registered handlers.
+        
+        TODO: Implement WebSocket message loop
+        TODO: Parse and dispatch events to registered handlers
+        TODO: Handle reconnection on failure
+        """
+        logger.info("EventSub listener started (stub)")
+        pass
+
+    def on(self, event_type: str) -> Callable:
+        """
+        Register an event handler for a specific event type.
+        
+        Args:
+            event_type: Type of event (e.g., 'stream.online', 'channel.follow')
+            
+        Returns:
+            Decorator function
+        """
+        def decorator(func: Callable) -> Callable:
+            self.event_handlers[event_type] = func
+            logger.debug(f"Registered handler for {event_type}")
+            return func
+        return decorator
+
+    async def emit_event(self, event_type: str, data: dict) -> None:
+        """
+        Emit an event to registered handlers (internal use).
+        
+        Args:
+            event_type: Type of event
+            data: Event data payload
+        """
+        if event_type in self.event_handlers:
+            handler = self.event_handlers[event_type]
+            try:
+                await handler(data)
+            except Exception as e:
+                logger.error(f"Error in event handler for {event_type}: {e}")