Real-time communication with frontend

- Frontend shows heatmap of most visit places
- Maximum accuracy can now be set
- Fix bug where battery chart filtered values wrongly

backend/lib/rabbit.ts

@@ -30,9 +30,9 @@ export class RabbitMQ {
                 return;
             }
 
-            logger.info(`New beat from ${phone.displayName} with ${msg.gpsLocation[2]} accuracy and ${msg.battery}% battery`)
+            logger.info(`New beat from ${phone.displayName} with ${msg.gpsLocation[2]} accuracy and ${msg.battery}% battery`);
 
-            Beat.create({
+            const newBeat = await Beat.create({
                 phone: phone._id,
                 coordinate: [msg.gpsLocation[0], msg.gpsLocation[1]],
                 accuracy: msg.gpsLocation[2],
@@ -40,6 +40,8 @@ export class RabbitMQ {
                 battery: msg.battery,
                 createdAt: msg.timestamp
             });
+            
+            this.channel!.publish('amq.topic', '.', Buffer.from(JSON.stringify(newBeat.toJSON())));
         }, { noAck: true });
     }