Devices can now subscribe to specific topics.

- Device can now become (in)active
- Error alert makes sound
- Alerts now execute function on click

backend/lib/rabbit.ts

@@ -14,6 +14,8 @@ export class RabbitMQ {
     connection: amqp.Connection | null = null;
     channel: amqp.Channel | null = null;
 
+    timeouts: Map<string, Timeout> = new Map<string, Timeout>();
+
     async init() {
         this.connection = await amqp.connect(RABBITMQ_URI);
         this.channel = await this.connection.createChannel();
@@ -26,7 +28,7 @@ export class RabbitMQ {
             // Get phone
             const phone = await Phone.findOne({ androidId: msg.token });
             if (phone == undefined) {
-                logger.info(`Received beat from unknown device with id ${msg.token}`);
+                logger.warning(`Received beat from unknown device with id ${msg.token}`);
                 return;
             }
 
@@ -41,13 +43,33 @@ export class RabbitMQ {
                 battery: msg.battery,
                 createdAt: msg.timestamp
             });
+
+            // Broadcast if device became active
+            if (this.timeouts.has(phone.id)) {
+                clearTimeout(this.timeouts.get(phone.id));
+            } else {
+                logger.debug('Set phone active');
+                phone.active = true;
+                await phone.save();
+                this.publish(phone.user.toString(), phone.toJSON(), 'phone_alive');
+            }
+
+            const timeoutTimer = setTimeout(async () => {
+                this.publish(phone.user.toString(), phone.toJSON(), 'phone_dead');
+                this.timeouts.delete(phone.id);
+                phone.active = false;
+                await phone.save();
+            }, 30_000);
+            this.timeouts.set(phone.id, timeoutTimer);
             
-            this.channel!.publish('amq.topic', '.', Buffer.from(JSON.stringify(newBeat.toJSON())));
+            this.publish(phone.user.toString(), newBeat.toJSON(), 'beat');
         }, { noAck: true });
     }
 
-    async publish(queueName = 'tracker', data: any) {
+    async publish(userId: string, data: any, type: 'beat' | 'phone_alive' | 'phone_dead' | 'phone_register' | 'panic' = 'beat') {
         if (this.connection == undefined) await this.init()
-        this.channel?.sendToQueue(queueName, Buffer.from(data));
+
+        data = { type, ...data };
+        this.channel?.publish('amq.topic', userId, Buffer.from(JSON.stringify(data)));
     }
 }