Wait for connection and properly clean up players

src/network/PeerServer.ts

@@ -34,6 +34,12 @@ function nextName(name: string): string {
   return name.substr(0, i) + (Number(name.slice(i)) + 1);
 }
 
+function connectionOpen(conn: DataConnection): Promise<void> {
+  return new Promise(resolve => {
+    conn.on("open", () => resolve());
+  });
+}
+
 export class PeerServer extends EventEmitter {
   protected peer: Peer;
   private room: Room;
@@ -64,17 +70,21 @@ export class PeerServer extends EventEmitter {
 
     // Setup peer
     this.peer = customPeer ? customPeer : new Peer();
-    this.peer.on("open", function(id) {
+    this.peer.on("open", id => {
       console.info("Peer ID assigned: %s", id);
+      this.emit("open", id);
     });
     this.peer.on("connection", conn => {
       this._connection(conn);
     });
   }
 
-  private _connection(conn: DataConnection) {
+  private async _connection(conn: DataConnection) {
     const metadata = conn.metadata as PeerMetadata;
 
+    // Wait for connection to be open
+    await connectionOpen(conn);
+
     let player: NetworkPlayer = {
       kind: "remote",
       name: metadata.name,
@@ -140,6 +150,12 @@ export class PeerServer extends EventEmitter {
 
   private addPlayer(player: NetworkPlayer) {
     const playerName = player.name;
+
+    // Hacky: Give player list before this player was added, so join
+    // message doesn't mess things up later
+    const players = Object.keys(this.room.players);
+
+    // Add player to room
     this.room.players[playerName] = player;
 
     // Start listening for new messages
@@ -148,6 +164,10 @@ export class PeerServer extends EventEmitter {
       this._received.bind(this, this.room.players[playerName])
     );
 
+    player.conn.on("error", err => {
+      throw err;
+    });
+
     // Send the player info about the room
     this.send<RoomInfoMessage>(player, {
       kind: "room-info",
@@ -155,7 +175,7 @@ export class PeerServer extends EventEmitter {
         ...this.room.info,
         password: ""
       },
-      players: Object.keys(this.room.players)
+      players
     });
 
     // Notify other players
@@ -172,6 +192,9 @@ export class PeerServer extends EventEmitter {
     // Close connection with player
     player.conn.close();
 
+    // Remove player from player list
+    delete this.room.players[player.name];
+
     // Notify other players
     this.broadcast<LeaveMessage>({
       kind: "player-left",