Paper/patches/server/0288-Add-PlayerConnectionCloseEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 7 Oct 2018 12:05:28 -0700
Subject: [PATCH] Add PlayerConnectionCloseEvent

This event is invoked when a player has disconnected. It is guaranteed that,
if the server is in online-mode, that the provided uuid and username have been
validated.

The event is invoked for players who have not yet logged into the world, whereas
PlayerQuitEvent is only invoked on players who have logged into the world.

The event is invoked for players who have already logged into the world,
although whether or not the player exists in the world at the time of
firing is undefined. (That is, whether the plugin can retrieve a Player object
using the event parameters is undefined). However, it is guaranteed that this
event is invoked AFTER PlayerQuitEvent, if the player has already logged into
the world.

This event is guaranteed to never fire unless AsyncPlayerPreLoginEvent has
been called beforehand, and this event may not be called in parallel with
AsyncPlayerPreLoginEvent for the same connection.

Cancelling the AsyncPlayerPreLoginEvent guarantees the corresponding
PlayerConnectionCloseEvent is never called.

The event may be invoked asynchronously or synchronously. As it stands,
it is never invoked asynchronously. However, plugins should check
Event#isAsynchronous to be future-proof.

On purpose, the deprecated PlayerPreLoginEvent event is left out of the
API spec for this event. Plugins should not be using that event, and
how PlayerPreLoginEvent interacts with PlayerConnectionCloseEvent
is undefined.

== AT ==
public net.minecraft.server.network.ServerLoginPacketListenerImpl$State
public net.minecraft.server.network.ServerLoginPacketListenerImpl state
public net.minecraft.server.network.ServerLoginPacketListenerImpl gameProfile

diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
index 6fcbf8205e1852d5193a42bfe1154f62ab01e7ad..9f8fbb8231b60c287c9442365c2f95cde92969b8 100644
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -644,6 +644,27 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
                     packetlistener1.onDisconnect(ichatbasecomponent);
                 }
                 this.pendingActions.clear(); // Free up packet queue.
+                // Paper start - Add PlayerConnectionCloseEvent
+                final PacketListener packetListener = this.getPacketListener();
+                if (packetListener instanceof net.minecraft.server.network.ServerGamePacketListenerImpl) {
+                    /* Player was logged in */
+                    final net.minecraft.server.network.ServerGamePacketListenerImpl playerConnection = (net.minecraft.server.network.ServerGamePacketListenerImpl) packetListener;
+                    new com.destroystokyo.paper.event.player.PlayerConnectionCloseEvent(playerConnection.player.getUUID(),
+                        playerConnection.player.getScoreboardName(), ((java.net.InetSocketAddress)address).getAddress(), false).callEvent();
+                } else if (packetListener instanceof net.minecraft.server.network.ServerLoginPacketListenerImpl) {
+                    /* Player is login stage */
+                    final net.minecraft.server.network.ServerLoginPacketListenerImpl loginListener = (net.minecraft.server.network.ServerLoginPacketListenerImpl) packetListener;
+                    switch (loginListener.state) {
+                        case VERIFYING:
+                        case WAITING_FOR_DUPE_DISCONNECT:
+                        case PROTOCOL_SWITCHING:
+                        case ACCEPTED:
+                            final com.mojang.authlib.GameProfile profile = loginListener.authenticatedProfile; /* Should be non-null at this stage */
+                            new com.destroystokyo.paper.event.player.PlayerConnectionCloseEvent(profile.getId(), profile.getName(),
+                                ((java.net.InetSocketAddress)address).getAddress(), false).callEvent();
+                    }
+                }
+                // Paper end
 
             }
         }
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index f870c20ecce27ebd893107a35e1b8f15e462ff85..c3e7a5f61e94d9905dc805bfc486819b61e143d1 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -58,7 +58,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
     @Nullable
     String requestedUsername;
     @Nullable
-    private GameProfile authenticatedProfile;
+    public GameProfile authenticatedProfile; // Paper - public
     private final String serverId;
     private ServerPlayer player; // CraftBukkit