From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 18 Mar 2018 11:45:57 -0400
Subject: [PATCH] Ability to change PlayerProfile in AsyncPreLoginEvent

This will allow you to change the players name or skin on login.

diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 109d7f1bf37e442ff80f7f63d50e27e6e30e0b5e..261ebb134a5ff40406e74237f730aad1c78a8215 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -1,5 +1,7 @@
 package net.minecraft.server.network;
 
+import com.destroystokyo.paper.profile.CraftPlayerProfile;
+import com.destroystokyo.paper.profile.PlayerProfile;
 import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.exceptions.AuthenticationUnavailableException;
 import java.math.BigInteger;
@@ -37,6 +39,7 @@ import org.apache.commons.lang3.Validate;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import io.papermc.paper.adventure.PaperAdventure; // Paper
+import org.bukkit.Bukkit;
 import org.bukkit.craftbukkit.util.Waitable;
 import org.bukkit.event.player.AsyncPlayerPreLoginEvent;
 import org.bukkit.event.player.PlayerPreLoginEvent;
@@ -336,8 +339,16 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
                         java.util.UUID uniqueId = ServerLoginPacketListenerImpl.this.gameProfile.getId();
                         final org.bukkit.craftbukkit.CraftServer server = ServerLoginPacketListenerImpl.this.server.server;
 
-                        AsyncPlayerPreLoginEvent asyncEvent = new AsyncPlayerPreLoginEvent(playerName, address, uniqueId);
+                            // Paper start
+                            PlayerProfile profile = Bukkit.createProfile(uniqueId, playerName);
+                            AsyncPlayerPreLoginEvent asyncEvent = new AsyncPlayerPreLoginEvent(playerName, address, uniqueId, profile);
                         server.getPluginManager().callEvent(asyncEvent);
+                            profile = asyncEvent.getPlayerProfile();
+                            profile.complete();
+                            gameProfile = CraftPlayerProfile.asAuthlibCopy(profile);
+                            playerName = gameProfile.getName();
+                            uniqueId = gameProfile.getId();
+                            // Paper end
 
                         if (PlayerPreLoginEvent.getHandlerList().getRegisteredListeners().length != 0) {
                             final PlayerPreLoginEvent event = new PlayerPreLoginEvent(playerName, address, uniqueId);