Fix empty chunks on proxy spawn (#89)

* Fix empty chunks on proxy spawn

Hack to fix issue with chunks not loading when client joins the proxy
* Queue chunk, respawn packets and only send them after player spawn

* fix lint

data/latest/proto.yml

@@ -923,7 +923,15 @@ packet_set_spawn_position:
 packet_animate:
    !id: 0x2c
    !bound: both
-   action_id: zigzag32
+   action_id: zigzag32 =>
+      0: none
+      1: swing_arm
+      2: unknown
+      3: wake_up
+      4: critical_hit
+      5: magic_critical_hit
+      6: row_right
+      7: row_left
    runtime_entity_id: varint64
 
 packet_respawn:

src/relay.js

@@ -31,6 +31,7 @@ class RelayPlayer extends Player {
     this.outLog = this.downOutLog
     this.inLog = this.downInLog
     this.chunkSendCache = []
+    this.respawnPacket = []
   }
 
   // Called when we get a packet from backend server (Backend -> PROXY -> Client)
@@ -54,14 +55,21 @@ class RelayPlayer extends Player {
     // If we're sending a chunk, but player isn't yet initialized, wait until it is.
     // This is wrong and should not be an issue to send chunks before the client
     // is in the world; need to investigate further, but for now it's fine.
-    if (name === 'level_chunk' && this.status !== 3) {
-      this.chunkSendCache.push([name, params])
-      return
+    if (this.status !== 3) {
+      if (name === 'level_chunk') {
+        this.chunkSendCache.push([name, params])
+        return
+      }
+      if (name === 'respawn') this.respawnPacket.push([name, params])
     } else if (this.status === 3 && this.chunkSendCache.length) {
       for (const chunk of this.chunkSendCache) {
         this.queue(...chunk)
       }
+      for (const rp of this.respawnPacket) {
+        this.queue(...rp)
+      }
       this.chunkSendCache = []
+      this.respawnPacket = []
     }
     this.queue(name, params)
   }