Paper/Spigot-Server-Patches/0321-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.

diff --git a/src/main/java/net/minecraft/server/LoginListener.java b/src/main/java/net/minecraft/server/LoginListener.java
index 44054552a1e0efaba0f69573bfb67f4a126507c6..c053c40a940bbfebbae48464d5f9e263f54af523 100644
--- a/src/main/java/net/minecraft/server/LoginListener.java
+++ b/src/main/java/net/minecraft/server/LoginListener.java
@@ -35,9 +35,9 @@ public class LoginListener implements PacketLoginInListener {
     private final byte[] e = new byte[4];
     private final MinecraftServer server;
     public final NetworkManager networkManager;
-    private LoginListener.EnumProtocolState g;
+    private LoginListener.EnumProtocolState g; public final LoginListener.EnumProtocolState getLoginState() { return this.g; }; // Paper - OBFHELPER
     private int h;
-    private GameProfile i; private void setGameProfile(final GameProfile profile) { this.i = profile; } private GameProfile getGameProfile() { return this.i; } // Paper - OBFHELPER
+    private GameProfile i; private void setGameProfile(final GameProfile profile) { this.i = profile; } public GameProfile getGameProfile() { return this.i; } // Paper - OBFHELPER
     private final String j;
     private SecretKey loginKey;
     private EntityPlayer l;
diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index 9ea4ce3aa6a43906eb7bf9593de0191a94242da2..8508f5f5136791ffcdf200f0087548ea636a9a7f 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -340,6 +340,26 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
                     this.j().a(new ChatMessage("multiplayer.disconnect.generic"));
                 }
                 this.packetQueue.clear(); // Free up packet queue.
+                // Paper start - Add PlayerConnectionCloseEvent
+                final PacketListener packetListener = this.j();
+                if (packetListener instanceof PlayerConnection) {
+                    /* Player was logged in */
+                    final PlayerConnection playerConnection = (PlayerConnection) packetListener;
+                    new com.destroystokyo.paper.event.player.PlayerConnectionCloseEvent(playerConnection.player.uniqueID,
+                        playerConnection.player.getName(), ((java.net.InetSocketAddress)socketAddress).getAddress(), false).callEvent();
+                } else if (packetListener instanceof LoginListener) {
+                    /* Player is login stage */
+                    final LoginListener loginListener = (LoginListener) packetListener;
+                    switch (loginListener.getLoginState()) {
+                        case READY_TO_ACCEPT:
+                        case DELAY_ACCEPT:
+                        case ACCEPTED:
+                            final com.mojang.authlib.GameProfile profile = loginListener.getGameProfile(); /* Should be non-null at this stage */
+                            new com.destroystokyo.paper.event.player.PlayerConnectionCloseEvent(profile.getId(), profile.getName(),
+                                ((java.net.InetSocketAddress)socketAddress).getAddress(), false).callEvent();
+                    }
+                }
+                // Paper end
             }
 
         }