136 lines
4.6 KiB
Python
136 lines
4.6 KiB
Python
import json
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import os
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import asyncio
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from functools import partial
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import traceback
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from fastapi import FastAPI, HTTPException
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import paho.mqtt.client as mqtt
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from datetime import datetime
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import firebase_admin
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from firebase_admin import credentials, firestore
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from pydantic import BaseModel
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from typing import Any, Dict
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app = FastAPI(title="Radio C2 Brain")
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# Configuration
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MQTT_BROKER = os.getenv("MQTT_BROKER", "mqtt-broker")
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FIREBASE_CRED_JSON = os.getenv("FIREBASE_CRED_JSON")
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FIRESTORE_DB_ID = os.getenv("FIRESTORE_DB_ID", "c2-server")
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C2_ID = "central-brain-01"
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# Database Init
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if FIREBASE_CRED_JSON:
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print("Initializing Firebase with provided JSON credentials...")
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cred = credentials.Certificate(json.loads(FIREBASE_CRED_JSON))
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firebase_admin.initialize_app(cred)
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else:
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print("Initializing Firebase with Application Default Credentials...")
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firebase_admin.initialize_app()
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print(f"Connecting to Firestore Database: {FIRESTORE_DB_ID}")
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db = firestore.client(database_id=FIRESTORE_DB_ID)
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# Local cache for quick lookups
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ACTIVE_NODES_CACHE = {}
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MAIN_LOOP = None
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# Pydantic Models
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class NodeCommand(BaseModel):
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command: str
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payload: Dict[str, Any]
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# Helper for async execution of blocking firestore calls
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async def async_firestore(func, *args, **kwargs):
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loop = asyncio.get_running_loop()
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return await loop.run_in_executor(None, partial(func, *args, **kwargs))
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def on_connect(client, userdata, flags, rc):
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print(f"Brain connected to MQTT Broker with result code {rc}")
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client.subscribe("nodes/+/checkin")
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client.subscribe("nodes/+/status")
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def on_message(client, userdata, msg):
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if MAIN_LOOP:
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asyncio.run_coroutine_threadsafe(handle_message(msg), MAIN_LOOP)
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async def handle_message(msg):
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topic_parts = msg.topic.split('/')
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if len(topic_parts) < 3: return
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node_id = topic_parts[1]
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event_type = topic_parts[2]
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try:
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payload = json.loads(msg.payload.decode())
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timestamp = datetime.utcnow()
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if event_type == "checkin":
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print(f"Processing checkin for {node_id}...")
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data = {
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"node_id": node_id,
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"last_seen": timestamp,
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"status": payload.get("status", "online"),
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"active_system": payload.get("active_system"),
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"available_systems": payload.get("available_systems", []),
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"config": payload,
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"radio_state": "active" if payload.get("is_listening") else "idle"
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}
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doc_ref = db.collection("nodes").document(node_id)
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print(f"Writing to Firestore: {doc_ref.path} in DB {FIRESTORE_DB_ID}")
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await async_firestore(doc_ref.set, data, merge=True)
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print(f"Successfully updated checkin for {node_id}")
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ACTIVE_NODES_CACHE[node_id] = data
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elif event_type == "status":
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print(f"Processing status update for {node_id}...")
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status = payload.get("status")
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doc_ref = db.collection("nodes").document(node_id)
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print(f"Writing to Firestore: {doc_ref.path} in DB {FIRESTORE_DB_ID}")
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await async_firestore(doc_ref.set, {"status": status, "last_seen": timestamp}, merge=True)
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print(f"Successfully updated status for {node_id}")
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if node_id in ACTIVE_NODES_CACHE:
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ACTIVE_NODES_CACHE[node_id]["status"] = status
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except Exception as e:
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print(f"Error processing MQTT message from {node_id}: {e}")
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traceback.print_exc()
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# MQTT Setup
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mqtt_client = mqtt.Client(client_id=C2_ID)
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mqtt_client.on_connect = on_connect
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mqtt_client.on_message = on_message
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@app.on_event("startup")
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async def startup_event():
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global MAIN_LOOP
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MAIN_LOOP = asyncio.get_running_loop()
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mqtt_client.connect_async(MQTT_BROKER, 1883, 60)
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mqtt_client.loop_start()
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@app.get("/nodes")
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async def get_nodes():
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def get_docs():
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return [
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{**doc.to_dict(), "_id": doc.id}
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for doc in db.collection("nodes").stream()
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]
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nodes = await async_firestore(get_docs)
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return nodes
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@app.post("/nodes/{node_id}/command")
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async def send_command_to_node(node_id: str, command: NodeCommand):
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if node_id not in ACTIVE_NODES_CACHE:
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raise HTTPException(status_code=404, detail="Node not found or is offline")
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topic = f"nodes/{node_id}/commands"
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message_payload = {
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"command": command.command,
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**command.payload
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}
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mqtt_client.publish(topic, json.dumps(message_payload), qos=1)
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return {"status": "command_sent", "node_id": node_id, "command": command.command} |