optimize sync

backend/syncSessions.mjs

@@ -9,17 +9,20 @@ export const syncSession = async sessionStore => {
   const hostStore = await UserStore.findById(sessionStore.host._id);
   const host = await hostStore.spotify.local;
   const hostCP = await host.player.getCurrentlyPlaying("track");
+  const hostCPDate = new Date();
   await Promise.all([...sessionStore.clients].map(async client => {
     const clientStore = await UserStore.findById(client._id);
     const clientLocal = await clientStore.spotify.local;
     const clientCP = await clientLocal.player.getCurrentlyPlaying("track");
-    if (clientCP?.item?.id !== hostCP?.item?.id) {
+    if (clientCP.isPlaying && !hostCP?.item?.uri || !hostCP.isPlaying) {
+      await clientLocal.player.pause();
+    } else if (hostCP.isPlaying && clientCP?.item?.id !== hostCP?.item?.id || !clientCP.isPlaying) {
       await clientLocal.player.play({
-        uris: [hostCP.item?.uri],
+        uris: [hostCP?.item?.uri],
-        position: hostCP.progress,
+        position: hostCP.progress + (new Date - hostCPDate),
       });
-    } else if (Math.abs(clientCP.progress - hostCP.progress) > 1000) {
+    } else if (Math.abs(clientCP.progress - hostCP.progress + (new Date - hostCPDate)) > 500) {
-      await clientLocal.player.seek(hostCP.progress);
+      await clientLocal.player.seek(hostCP.progress + (new Date - hostCPDate));
     }
   }));
 };