Addidng chat_listener function for Twitch, adding custom overlay template for testing.

TASKS.md

@@ -54,8 +54,11 @@ If you want to use emojis for visibility, here's some I have used:
 * **Goal:** The core magic. Start chat listeners for users and show messages in the overlay.
 * *(All tasks for this phase are on hold until Phase 2 is complete)*
 
+### In Progress
+* `[🧑‍🔧]` **3.1: Dynamic Listener Manager (The Big One):** Design a system (e.g., background service) to start/stop listener processes for users. @ramforth
+
+
 ### To Do
-* `[ ]` **3.1: Dynamic Listener Manager (The Big One):** Design a system (e.g., background service) to start/stop listener processes for users.
 * `[ ]` **3.2: User-Specific Broadcasting:** Update the WebSocket system to use "rooms" (e.g., `/ws/{user_id}`) so users only get their *own* chat.
 * `[ ]` **3.3: Basic Overlay UI:** Create the `overlay.html` page that connects to the WebSocket and displays messages.
 

chat_listener.py

@@ -0,0 +1,23 @@
+from twitchio.ext import commands
+
+class TwitchBot(commands.Bot):
+    def __init__(self, access_token: str, channel_name: str):
+        super().__init__(
+            token=access_token,
+            prefix='!', # A prefix is required but won't be used for reading chat
+            initial_channels=[channel_name]
+        )
+        self.channel_name = channel_name
+
+    async def event_ready(self):
+        """Called once when the bot goes online."""
+        print(f"Listener ready for #{self.channel_name}")
+
+    async def event_message(self, message):
+        """Runs every time a message is sent in chat."""
+        if message.echo:
+            return # Ignore messages sent by the bot itself
+        
+        # For now, we just print the message to the console.
+        # Later, this will push messages to a queue for the WebSocket.
+        print(f"Message from {message.author.name} in #{self.channel_name}: {message.content}")

listener_manager.py

@@ -0,0 +1,42 @@
+import asyncio
+from typing import Dict
+
+from chat_listener import TwitchBot
+import security # To decrypt tokens
+
+class ListenerManager:
+    def __init__(self):
+        # This dictionary will hold our running listener tasks.
+        # The key will be the user_id and the value will be the asyncio.Task.
+        self.active_listeners: Dict[int, asyncio.Task] = {}
+        print("ListenerManager initialized.")
+
+    async def start_listener_for_user(self, user):
+        """
+        Starts a chat listener for a given user if one isn't already running.
+        """
+        if user.id in self.active_listeners:
+            print(f"Listener for user {user.id} is already running.")
+            return
+
+        print(f"Starting listener for user {user.id} ({user.username})...")
+        
+        tokens = security.decrypt_tokens(user.encrypted_tokens)
+        access_token = tokens['access_token']
+        bot = TwitchBot(access_token=access_token, channel_name=user.username)
+        task = asyncio.create_task(bot.start())
+        self.active_listeners[user.id] = task
+
+    async def stop_listener_for_user(self, user_id: int):
+        """Stops a chat listener for a given user."""
+        if user_id not in self.active_listeners:
+            print(f"No active listener found for user {user_id}.")
+            return
+
+        print(f"Stopping listener for user {user_id}...")
+        task = self.active_listeners.pop(user_id)
+        task.cancel()
+        try:
+            await task
+        except asyncio.CancelledError:
+            print(f"Listener for user {user_id} successfully stopped.")

main.py

@@ -8,11 +8,12 @@ from contextlib import asynccontextmanager
 from sqlalchemy.orm import Session
 
 import models
-from database import engine
+from database import engine, SessionLocal
 import auth # Import the new auth module
 import schemas
 from starlette.responses import Response
 from config import settings # Import settings to get the secret key
+from listener_manager import ListenerManager
 
 # --- Absolute Path Configuration ---
 # Get the absolute path of the directory where this file is located
@@ -24,10 +25,25 @@ TEMPLATES_DIR = os.path.join(BASE_DIR, "templates")
 async def lifespan(app: FastAPI):
     # This code runs on startup
     print("Application startup: Creating database tables...")
+    app.state.listener_manager = ListenerManager()
     models.Base.metadata.create_all(bind=engine)
     print("Application startup: Database tables created.")
+
+    # Start listeners for all existing users
+    db = SessionLocal()
+    users = db.query(models.User).all()
+    db.close()
+    for user in users:
+        await app.state.listener_manager.start_listener_for_user(user)
+
     yield
-    # Code below yield runs on shutdown, if needed
+    
+    # This code runs on shutdown
+    print("Application shutdown: Stopping all listeners...")
+    manager = app.state.listener_manager
+    # Create a copy of keys to avoid runtime errors from changing dict size
+    for user_id in list(manager.active_listeners.keys()):
+        await manager.stop_listener_for_user(user_id)
 
 app = FastAPI(lifespan=lifespan)
 

requirements.txt

@@ -7,4 +7,5 @@ python-dotenv
 itsdangerous
 jinja2
 pydantic
-python-jose[cryptography]
+python-jose[cryptography]
+twitchio

templates/overlay_test.html

@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Live Test Overlay</title>
+    <style>
+        body {
+            background-color: black;
+            color: white;
+            font-family: sans-serif;
+            margin: 0;
+            padding: 20px;
+        }
+        .message {
+            margin-bottom: 10px;
+        }
+    </style>
+</head>
+<body>
+    <h1>Live Test Overlay</h1>
+    <div id="chat-messages">
+        <!-- Messages will appear here -->
+    </div>
+
+    <script>
+        // JavaScript to connect to WebSocket and display messages will go here
+    </script>
+</body>
+</html>