More logical syncronisation

src/index.ts

@@ -31,6 +31,7 @@ router.post('/room', async (ctx) => {
           createdAt: new Date(),
           movie: torrent.name,
           position: 0,
+          syncedAt: new Date(),
         };
         const doc = new RoomModel(room);
   
@@ -58,15 +59,20 @@ router.get('/room', async (ctx) => {
 });
 
 router.post('/position', async (ctx) => {
-  await RoomModel.updateOne({ id: ctx.request.body.id }, { position: Number(ctx.request.body.position) });
+  await RoomModel.updateOne({ id: ctx.request.body.id }, { 
+    position: Number(ctx.request.body.position),
+    syncedAt: new Date(),
+  });
   ctx.body = 'success';
 });
 
 router.get('/position', async (ctx) => {
   const room = await RoomModel.findOne({ id: ctx.request.query.id }).exec();
   if (room) {
+    const elapsedTime = new Date().getTime() - new Date(room.syncedAt).getTime();
     ctx.body = {
-      position: room.position,
+      position: room.position + elapsedTime / 1000,
+      syncedAt: room.syncedAt,
     };
   } else {
     ({ status: ctx.status, body: ctx.body } = errorResponse('room-00', 'Room not found'));

src/interfaces.ts

@@ -9,6 +9,7 @@ export interface Room {
   downloaded?: boolean;
   downloadedAt?: Date;
   position: number;
+  syncedAt: Date;
 }
 
 export const roomSchema = new Schema<Room>({
@@ -20,4 +21,5 @@ export const roomSchema = new Schema<Room>({
   downloaded: { type: Boolean, required: false },
   downloadedAt: { type: Date, required: false },
   position: { type: Number, required: true },
+  syncedAt: { type: Date, required: true },
 });