Paper-Old/nms-patches/PlayerList.patch

--- a/net/minecraft/server/PlayerList.java
+++ b/net/minecraft/server/PlayerList.java
@@ -19,6 +19,29 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+// CraftBukkit start
+import com.google.common.base.Predicate;
+import com.google.common.collect.Iterables;
+
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.chunkio.ChunkIOExecutor;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.TravelAgent;
+import org.bukkit.craftbukkit.util.CraftChatMessage;
+import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerPortalEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.event.player.PlayerRespawnEvent;
+import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
+import org.bukkit.util.Vector;
+// CraftBukkit end
+
 public abstract class PlayerList {
 
     public static final File a = new File("banned-players.json");
@@ -28,14 +51,16 @@
     private static final Logger f = LogManager.getLogger();
     private static final SimpleDateFormat g = new SimpleDateFormat("yyyy-MM-dd \'at\' HH:mm:ss z");
     private final MinecraftServer server;
-    public final List<EntityPlayer> players = Lists.newArrayList();
+    public final List<EntityPlayer> players = new java.util.concurrent.CopyOnWriteArrayList(); // CraftBukkit - ArrayList -> CopyOnWriteArrayList: Iterator safety
     private final Map<UUID, EntityPlayer> j = Maps.newHashMap();
     private final GameProfileBanList k;
     private final IpBanList l;
     private final OpList operators;
     private final WhiteList whitelist;
-    private final Map<UUID, ServerStatisticManager> o;
-    private final Map<UUID, AdvancementDataPlayer> p;
+    // CraftBukkit start
+    // private final Map<UUID, ServerStatisticManager> o;
+    // private final Map<UUID, AdvancementDataPlayer> p;
+    // CraftBukkit end
     public IPlayerFileData playerFileData;
     private boolean hasWhitelist;
     protected int maxPlayers;
@@ -44,13 +69,23 @@
     private boolean u;
     private int v;
 
+    // CraftBukkit start
+    private CraftServer cserver;
+
     public PlayerList(MinecraftServer minecraftserver) {
+        this.cserver = minecraftserver.server = new CraftServer(minecraftserver, this);
+        minecraftserver.console = org.bukkit.craftbukkit.command.ColouredConsoleSender.getInstance();
+        minecraftserver.reader.addCompleter(new org.bukkit.craftbukkit.command.ConsoleCommandCompleter(minecraftserver.server));
+        // CraftBukkit end
+
         this.k = new GameProfileBanList(PlayerList.a);
         this.l = new IpBanList(PlayerList.b);
         this.operators = new OpList(PlayerList.c);
         this.whitelist = new WhiteList(PlayerList.d);
-        this.o = Maps.newHashMap();
-        this.p = Maps.newHashMap();
+        // CraftBukkit start
+        // this.o = Maps.newHashMap();
+        // this.p = Maps.newHashMap();
+        // CraftBukkit end
         this.server = minecraftserver;
         this.getProfileBans().a(true);
         this.getIPBans().a(true);
@@ -65,6 +100,12 @@
 
         usercache.a(gameprofile);
         NBTTagCompound nbttagcompound = this.a(entityplayer);
+        // CraftBukkit start - Better rename detection
+        if (nbttagcompound != null && nbttagcompound.hasKey("bukkit")) {
+            NBTTagCompound bukkit = nbttagcompound.getCompound("bukkit");
+            s = bukkit.hasKeyOfType("lastKnownName", 8) ? bukkit.getString("lastKnownName") : s;
+        }
+        // CraftBukkit end
 
         entityplayer.spawnIn(this.server.getWorldServer(entityplayer.dimension));
         entityplayer.playerInteractManager.a((WorldServer) entityplayer.world);
@@ -74,7 +115,8 @@
             s1 = networkmanager.getSocketAddress().toString();
         }
 
-        PlayerList.f.info("{}[{}] logged in with entity id {} at ({}, {}, {})", entityplayer.getDisplayName().getString(), s1, Integer.valueOf(entityplayer.getId()), Double.valueOf(entityplayer.locX), Double.valueOf(entityplayer.locY), Double.valueOf(entityplayer.locZ));
+        // CraftBukkit - Moved message to after join
+        // PlayerList.f.info("{}[{}] logged in with entity id {} at ({}, {}, {})", entityplayer.getDisplayName().getString(), s1, Integer.valueOf(entityplayer.getId()), Double.valueOf(entityplayer.locX), Double.valueOf(entityplayer.locY), Double.valueOf(entityplayer.locZ));
         WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);
         WorldData worlddata = worldserver.getWorldData();
 
@@ -82,6 +124,7 @@
         PlayerConnection playerconnection = new PlayerConnection(this.server, networkmanager, entityplayer);
 
         playerconnection.sendPacket(new PacketPlayOutLogin(entityplayer.getId(), entityplayer.playerInteractManager.getGameMode(), worlddata.isHardcore(), worldserver.worldProvider.getDimensionManager().getDimensionID(), worldserver.getDifficulty(), this.getMaxPlayers(), worlddata.getType(), worldserver.getGameRules().getBoolean("reducedDebugInfo")));
+        entityplayer.getBukkitEntity().sendSupportedChannels(); // CraftBukkit
         playerconnection.sendPacket(new PacketPlayOutCustomPayload(PacketPlayOutCustomPayload.b, (new PacketDataSerializer(Unpooled.buffer())).a(this.getServer().getServerModName())));
         playerconnection.sendPacket(new PacketPlayOutServerDifficulty(worlddata.getDifficulty(), worlddata.isDifficultyLocked()));
         playerconnection.sendPacket(new PacketPlayOutAbilities(entityplayer.abilities));
@@ -101,8 +144,10 @@
             chatmessage = new ChatMessage("multiplayer.player.joined.renamed", new Object[] { entityplayer.getScoreboardDisplayName(), s});
         }
 
-        this.sendMessage(chatmessage.a(EnumChatFormat.YELLOW));
-        this.onPlayerJoin(entityplayer);
+        chatmessage.a(EnumChatFormat.YELLOW);
+        this.onPlayerJoin(entityplayer, CraftChatMessage.fromComponent(chatmessage));
+        // CraftBukkit end
+        worldserver = server.getWorldServer(entityplayer.dimension);  // CraftBukkit - Update in case join event changed it
         playerconnection.a(entityplayer.locX, entityplayer.locY, entityplayer.locZ, entityplayer.yaw, entityplayer.pitch);
         this.b(entityplayer, worldserver);
         if (!this.server.getResourcePack().isEmpty()) {
@@ -154,6 +199,8 @@
         }
 
         entityplayer.syncInventory();
+        // CraftBukkit - Moved from above, added world
+        PlayerList.f.info("{}[{}] logged in with entity id {} at ([{}]{}, {}, {})", entityplayer.getDisplayName().getString(), s1, Integer.valueOf(entityplayer.getId()), entityplayer.world.worldData.getName(), Double.valueOf(entityplayer.locX), Double.valueOf(entityplayer.locY), Double.valueOf(entityplayer.locZ));
     }
 
     public void sendScoreboard(ScoreboardServer scoreboardserver, EntityPlayer entityplayer) {
@@ -186,26 +233,27 @@
     }
 
     public void setPlayerFileData(WorldServer[] aworldserver) {
+        if (playerFileData != null) return; // CraftBukkit
         this.playerFileData = aworldserver[0].getDataManager().getPlayerFileData();
         aworldserver[0].getWorldBorder().a(new IWorldBorderListener() {
             public void a(WorldBorder worldborder, double d0) {
-                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_SIZE));
+                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_SIZE), worldborder.world);
             }
 
             public void a(WorldBorder worldborder, double d0, double d1, long i) {
-                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.LERP_SIZE));
+                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.LERP_SIZE), worldborder.world);
             }
 
             public void a(WorldBorder worldborder, double d0, double d1) {
-                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_CENTER));
+                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_CENTER), worldborder.world);
             }
 
             public void a(WorldBorder worldborder, int i) {
-                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_WARNING_TIME));
+                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_WARNING_TIME), worldborder.world);
             }
 
             public void b(WorldBorder worldborder, int i) {
-                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_WARNING_BLOCKS));
+                PlayerList.this.sendAll(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.SET_WARNING_BLOCKS), worldborder.world);
             }
 
             public void b(WorldBorder worldborder, double d0) {}
@@ -238,7 +286,7 @@
 
     @Nullable
     public NBTTagCompound a(EntityPlayer entityplayer) {
-        NBTTagCompound nbttagcompound = this.server.worldServer[0].getWorldData().h();
+        NBTTagCompound nbttagcompound = this.server.worlds.get(0).getWorldData().h(); // CraftBukkit
         NBTTagCompound nbttagcompound1;
 
         if (entityplayer.getDisplayName().getString().equals(this.server.I()) && nbttagcompound != null) {
@@ -254,13 +302,13 @@
 
     protected void savePlayerFile(EntityPlayer entityplayer) {
         this.playerFileData.save(entityplayer);
-        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.o.get(entityplayer.getUniqueID());
+        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) entityplayer.getStatisticManager(); // CraftBukkit
 
         if (serverstatisticmanager != null) {
             serverstatisticmanager.a();
         }
 
-        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) this.p.get(entityplayer.getUniqueID());
+        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) entityplayer.getAdvancementData(); // CraftBukkit
 
         if (advancementdataplayer != null) {
             advancementdataplayer.c();
@@ -268,29 +316,80 @@
 
     }
 
-    public void onPlayerJoin(EntityPlayer entityplayer) {
+    public void onPlayerJoin(EntityPlayer entityplayer, String joinMessage) { // CraftBukkit added param
         this.players.add(entityplayer);
         this.j.put(entityplayer.getUniqueID(), entityplayer);
-        this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { entityplayer}));
+        // this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { entityplayer})); // CraftBukkit - replaced with loop below
         WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);
 
+        // CraftBukkit start
+        PlayerJoinEvent playerJoinEvent = new PlayerJoinEvent(cserver.getPlayer(entityplayer), joinMessage);
+        cserver.getPluginManager().callEvent(playerJoinEvent);
+
+        if (!entityplayer.playerConnection.networkManager.isConnected()) {
+            return;
+        }
+
+        joinMessage = playerJoinEvent.getJoinMessage();
+
+        if (joinMessage != null && joinMessage.length() > 0) {
+            for (IChatBaseComponent line : org.bukkit.craftbukkit.util.CraftChatMessage.fromString(joinMessage)) {
+                server.getPlayerList().sendAll(new PacketPlayOutChat(line));
+            }
+        }
+
+        ChunkIOExecutor.adjustPoolSize(getPlayerCount());
+        // CraftBukkit end
+
+        // CraftBukkit start - sendAll above replaced with this loop
+        PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, entityplayer);
+
         for (int i = 0; i < this.players.size(); ++i) {
-            entityplayer.playerConnection.sendPacket(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { (EntityPlayer) this.players.get(i)}));
+            EntityPlayer entityplayer1 = (EntityPlayer) this.players.get(i);
+
+            if (entityplayer1.getBukkitEntity().canSee(entityplayer.getBukkitEntity())) {
+                entityplayer1.playerConnection.sendPacket(packet);
+            }
+
+            if (!entityplayer.getBukkitEntity().canSee(entityplayer1.getBukkitEntity())) {
+                continue;
+            }
+
+            entityplayer.playerConnection.sendPacket(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { entityplayer1}));
         }
+        entityplayer.sentListPacket = true;
+        // CraftBukkit end
+
+        entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityMetadata(entityplayer.getId(), entityplayer.datawatcher, true)); // CraftBukkit - BungeeCord#2321, send complete data to self on spawn
 
-        worldserver.addEntity(entityplayer);
-        this.a(entityplayer, (WorldServer) null);
-        this.server.aR().a(entityplayer);
+        // CraftBukkit start - Only add if the player wasn't moved in the event
+        if (entityplayer.world == worldserver && !worldserver.players.contains(entityplayer)) {
+            worldserver.addEntity(entityplayer);
+            this.a(entityplayer, (WorldServer) null);
+            this.server.aR().a(entityplayer);
+        }
+        // CraftBukkit end
     }
 
     public void d(EntityPlayer entityplayer) {
         entityplayer.getWorldServer().getPlayerChunkMap().movePlayer(entityplayer);
     }
 
-    public void disconnect(EntityPlayer entityplayer) {
+    public String disconnect(EntityPlayer entityplayer) { // CraftBukkit - return string
         WorldServer worldserver = entityplayer.getWorldServer();
 
         entityplayer.a(StatisticList.LEAVE_GAME);
+
+        // CraftBukkit start - Quitting must be before we do final save of data, in case plugins need to modify it
+        org.bukkit.craftbukkit.event.CraftEventFactory.handleInventoryCloseEvent(entityplayer);
+
+        PlayerQuitEvent playerQuitEvent = new PlayerQuitEvent(cserver.getPlayer(entityplayer), "\u00A7e" + entityplayer.getName() + " left the game");
+        cserver.getPluginManager().callEvent(playerQuitEvent);
+        entityplayer.getBukkitEntity().disconnect(playerQuitEvent.getQuitMessage());
+
+        entityplayer.playerTick();// SPIGOT-924
+        // CraftBukkit end
+
         this.savePlayerFile(entityplayer);
         if (entityplayer.isPassenger()) {
             Entity entity = entityplayer.getRootVehicle();
@@ -321,18 +420,68 @@
 
         if (entityplayer1 == entityplayer) {
             this.j.remove(uuid);
-            this.o.remove(uuid);
-            this.p.remove(uuid);
+            // CraftBukkit start
+            // this.o.remove(uuid);
+            // this.p.remove(uuid);
+            // CraftBukkit end
         }
 
-        this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.REMOVE_PLAYER, new EntityPlayer[] { entityplayer}));
+        // CraftBukkit start
+        //  this.sendAll(new PacketPlayOutPlayerInfo(EnumPlayerInfoAction.REMOVE_PLAYER, new EntityPlayer[] { entityplayer}));
+        PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.REMOVE_PLAYER, entityplayer);
+        for (int i = 0; i < players.size(); i++) {
+            EntityPlayer entityplayer2 = (EntityPlayer) this.players.get(i);
+
+            if (entityplayer2.getBukkitEntity().canSee(entityplayer.getBukkitEntity())) {
+                entityplayer2.playerConnection.sendPacket(packet);
+            } else {
+                entityplayer2.getBukkitEntity().removeDisconnectingPlayer(entityplayer.getBukkitEntity());
+            }
+        }
+        // This removes the scoreboard (and player reference) for the specific player in the manager
+        cserver.getScoreboardManager().removePlayer(entityplayer.getBukkitEntity());
+        // CraftBukkit end
+
+        ChunkIOExecutor.adjustPoolSize(this.getPlayerCount()); // CraftBukkit
+
+        return playerQuitEvent.getQuitMessage(); // CraftBukkit
     }
 
-    @Nullable
-    public IChatBaseComponent attemptLogin(SocketAddress socketaddress, GameProfile gameprofile) {
+    // CraftBukkit start - Whole method, SocketAddress to LoginListener, added hostname to signature, return EntityPlayer
+    public EntityPlayer attemptLogin(LoginListener loginlistener, GameProfile gameprofile, String hostname) {
         ChatMessage chatmessage;
 
-        if (this.k.isBanned(gameprofile)) {
+        // Moved from processLogin
+        UUID uuid = EntityHuman.a(gameprofile);
+        ArrayList arraylist = Lists.newArrayList();
+
+        EntityPlayer entityplayer;
+
+        for (int i = 0; i < this.players.size(); ++i) {
+            entityplayer = (EntityPlayer) this.players.get(i);
+            if (entityplayer.getUniqueID().equals(uuid)) {
+                arraylist.add(entityplayer);
+            }
+        }
+
+        Iterator iterator = arraylist.iterator();
+
+        while (iterator.hasNext()) {
+            entityplayer = (EntityPlayer) iterator.next();
+            savePlayerFile(entityplayer); // CraftBukkit - Force the player's inventory to be saved
+            entityplayer.playerConnection.disconnect(new ChatMessage("multiplayer.disconnect.duplicate_login", new Object[0]));
+        }
+
+        // Instead of kicking then returning, we need to store the kick reason
+        // in the event, check with plugins to see if it's ok, and THEN kick
+        // depending on the outcome.
+        SocketAddress socketaddress = loginlistener.networkManager.getSocketAddress();
+
+        EntityPlayer entity = new EntityPlayer(this.server, this.server.a(DimensionManager.OVERWORLD), gameprofile, new PlayerInteractManager(this.server.a(DimensionManager.OVERWORLD)));
+        Player player = entity.getBukkitEntity();
+        PlayerLoginEvent event = new PlayerLoginEvent(player, hostname, ((java.net.InetSocketAddress) socketaddress).getAddress());
+
+        if (getProfileBans().isBanned(gameprofile) && !getProfileBans().get(gameprofile).hasExpired()) {
             GameProfileBanEntry gameprofilebanentry = (GameProfileBanEntry) this.k.get(gameprofile);
 
             chatmessage = new ChatMessage("multiplayer.disconnect.banned.reason", new Object[] { gameprofilebanentry.getReason()});
@@ -340,10 +489,12 @@
                 chatmessage.addSibling(new ChatMessage("multiplayer.disconnect.banned.expiration", new Object[] { PlayerList.g.format(gameprofilebanentry.getExpires())}));
             }
 
-            return chatmessage;
+            // return chatmessage;
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(chatmessage));
         } else if (!this.isWhitelisted(gameprofile)) {
-            return new ChatMessage("multiplayer.disconnect.not_whitelisted", new Object[0]);
-        } else if (this.l.isBanned(socketaddress)) {
+            chatmessage = new ChatMessage("multiplayer.disconnect.not_whitelisted", new Object[0]);
+            event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, CraftChatMessage.fromComponent(chatmessage));
+        } else if (getIPBans().isBanned(socketaddress) && !getIPBans().get(socketaddress).hasExpired()) {
             IpBanEntry ipbanentry = this.l.get(socketaddress);
 
             chatmessage = new ChatMessage("multiplayer.disconnect.banned_ip.reason", new Object[] { ipbanentry.getReason()});
@@ -351,13 +502,25 @@
                 chatmessage.addSibling(new ChatMessage("multiplayer.disconnect.banned_ip.expiration", new Object[] { PlayerList.g.format(ipbanentry.getExpires())}));
             }
 
-            return chatmessage;
+            // return chatmessage;
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(chatmessage));
         } else {
-            return this.players.size() >= this.maxPlayers && !this.f(gameprofile) ? new ChatMessage("multiplayer.disconnect.server_full", new Object[0]) : null;
+            // return this.players.size() >= this.maxPlayers && !this.f(gameprofile) ? new ChatMessage("multiplayer.disconnect.server_full", new Object[0]) : null;
+            if (this.players.size() >= this.maxPlayers && !this.f(gameprofile)) {
+                event.disallow(PlayerLoginEvent.Result.KICK_FULL, "The server is full");
+            }
+        }
+
+        cserver.getPluginManager().callEvent(event);
+        if (event.getResult() != PlayerLoginEvent.Result.ALLOWED) {
+            loginlistener.disconnect(event.getKickMessage());
+            return null;
         }
+        return entity;
     }
 
-    public EntityPlayer processLogin(GameProfile gameprofile) {
+    public EntityPlayer processLogin(GameProfile gameprofile, EntityPlayer player) { // CraftBukkit - added EntityPlayer
+        /* CraftBukkit startMoved up
         UUID uuid = EntityHuman.a(gameprofile);
         ArrayList arraylist = Lists.newArrayList();
 
@@ -392,17 +555,27 @@
         }
 
         return new EntityPlayer(this.server, this.server.a(DimensionManager.OVERWORLD), gameprofile, (PlayerInteractManager) object);
+        */
+        return player;
+        // CraftBukkit end
     }
 
+    // CraftBukkit start
     public EntityPlayer moveToWorld(EntityPlayer entityplayer, int i, boolean flag) {
+        return this.moveToWorld(entityplayer, i, flag, null, true);
+    }
+
+    public EntityPlayer moveToWorld(EntityPlayer entityplayer, int i, boolean flag, Location location, boolean avoidSuffocation) {
+        entityplayer.stopRiding(); // CraftBukkit
         entityplayer.getWorldServer().getTracker().untrackPlayer(entityplayer);
-        entityplayer.getWorldServer().getTracker().untrackEntity(entityplayer);
+        // entityplayer.getWorldServer().getTracker().untrackEntity(entityplayer); // CraftBukkit
         entityplayer.getWorldServer().getPlayerChunkMap().removePlayer(entityplayer);
         this.players.remove(entityplayer);
         this.server.getWorldServer(entityplayer.dimension).removeEntity(entityplayer);
         BlockPosition blockposition = entityplayer.getBed();
         boolean flag1 = entityplayer.isRespawnForced();
 
+        /* CraftBukkit start
         entityplayer.dimension = i;
         Object object;
 
@@ -413,6 +586,11 @@
         }
 
         EntityPlayer entityplayer1 = new EntityPlayer(this.server, this.server.getWorldServer(entityplayer.dimension), entityplayer.getProfile(), (PlayerInteractManager) object);
+        // */
+        EntityPlayer entityplayer1 = entityplayer;
+        org.bukkit.World fromWorld = entityplayer.getBukkitEntity().getWorld();
+        entityplayer.viewingCredits = false;
+        // CraftBukkit end
 
         entityplayer1.playerConnection = entityplayer.playerConnection;
         entityplayer1.copyFrom(entityplayer, flag);
@@ -426,43 +604,166 @@
             entityplayer1.addScoreboardTag(s);
         }
 
-        WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);
+        // WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);  // CraftBukkit - handled later
 
-        this.a(entityplayer1, entityplayer, worldserver);
+        // this.a(entityplayer1, entityplayer, worldserver); // CraftBukkit - removed
         BlockPosition blockposition1;
 
-        if (blockposition != null) {
-            blockposition1 = EntityHuman.getBed(this.server.getWorldServer(entityplayer.dimension), blockposition, flag1);
-            if (blockposition1 != null) {
-                entityplayer1.setPositionRotation((double) ((float) blockposition1.getX() + 0.5F), (double) ((float) blockposition1.getY() + 0.1F), (double) ((float) blockposition1.getZ() + 0.5F), 0.0F, 0.0F);
-                entityplayer1.setRespawnPosition(blockposition, flag1);
-            } else {
-                entityplayer1.playerConnection.sendPacket(new PacketPlayOutGameStateChange(0, 0.0F));
+        // CraftBukkit start - fire PlayerRespawnEvent
+        if (location == null) {
+            boolean isBedSpawn = false;
+            CraftWorld cworld = (CraftWorld) this.server.server.getWorld(entityplayer.spawnWorld);
+            if (cworld != null && blockposition != null) {
+                blockposition1 = EntityHuman.getBed(cworld.getHandle(), blockposition, flag1);
+                if (blockposition1 != null) {
+                    isBedSpawn = true;
+                    location = new Location(cworld, (double) ((float) blockposition1.getX() + 0.5F), (double) ((float) blockposition1.getY() + 0.1F), (double) ((float) blockposition1.getZ() + 0.5F));
+                } else {
+                    entityplayer1.setRespawnPosition(null, true);
+                    entityplayer1.playerConnection.sendPacket(new PacketPlayOutGameStateChange(0, 0.0F));
+                }
+            }
+
+            if (location == null) {
+                cworld = (CraftWorld) this.server.server.getWorlds().get(0);
+                blockposition = entityplayer1.getSpawnPoint(cworld.getHandle());
+                location = new Location(cworld, (double) ((float) blockposition.getX() + 0.5F), (double) ((float) blockposition.getY() + 0.1F), (double) ((float) blockposition.getZ() + 0.5F));
             }
+
+            Player respawnPlayer = cserver.getPlayer(entityplayer1);
+            PlayerRespawnEvent respawnEvent = new PlayerRespawnEvent(respawnPlayer, location, isBedSpawn);
+            cserver.getPluginManager().callEvent(respawnEvent);
+
+            location = respawnEvent.getRespawnLocation();
+            entityplayer.reset();
+        } else {
+            location.setWorld(server.getWorldServer(i).getWorld());
         }
+        WorldServer worldserver = ((CraftWorld) location.getWorld()).getHandle();
+        entityplayer1.forceSetPositionRotation(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+        // CraftBukkit end
 
         worldserver.getChunkProviderServer().getChunkAt((int) entityplayer1.locX >> 4, (int) entityplayer1.locZ >> 4);
 
-        while (!worldserver.getCubes(entityplayer1, entityplayer1.getBoundingBox()) && entityplayer1.locY < 256.0D) {
+        while (avoidSuffocation && !worldserver.getCubes(entityplayer1, entityplayer1.getBoundingBox()) && entityplayer1.locY < 256.0D) {
             entityplayer1.setPosition(entityplayer1.locX, entityplayer1.locY + 1.0D, entityplayer1.locZ);
         }
+        // CraftBukkit start
+        byte actualDimension = (byte) (worldserver.getWorld().getEnvironment().getId());
+        // Force the client to refresh their chunk cache
+        if (fromWorld.getEnvironment() == worldserver.getWorld().getEnvironment()) {
+            entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn((byte) (actualDimension >= 0 ? -1 : 0), worldserver.getDifficulty(), worldserver.getWorldData().getType(), entityplayer.playerInteractManager.getGameMode()));
+        }
 
-        entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn(entityplayer1.dimension, entityplayer1.world.getDifficulty(), entityplayer1.world.getWorldData().getType(), entityplayer1.playerInteractManager.getGameMode()));
+        entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn(actualDimension, worldserver.getDifficulty(), worldserver.getWorldData().getType(), entityplayer1.playerInteractManager.getGameMode()));
+        entityplayer1.spawnIn(worldserver);
+        entityplayer1.dead = false;
+        entityplayer1.playerConnection.teleport(new Location(worldserver.getWorld(), entityplayer1.locX, entityplayer1.locY, entityplayer1.locZ, entityplayer1.yaw, entityplayer1.pitch));
+        entityplayer1.setSneaking(false);
         blockposition1 = worldserver.getSpawn();
-        entityplayer1.playerConnection.a(entityplayer1.locX, entityplayer1.locY, entityplayer1.locZ, entityplayer1.yaw, entityplayer1.pitch);
+        // entityplayer1.playerConnection.a(entityplayer1.locX, entityplayer1.locY, entityplayer1.locZ, entityplayer1.yaw, entityplayer1.pitch);
         entityplayer1.playerConnection.sendPacket(new PacketPlayOutSpawnPosition(blockposition1));
         entityplayer1.playerConnection.sendPacket(new PacketPlayOutExperience(entityplayer1.exp, entityplayer1.expTotal, entityplayer1.expLevel));
         this.b(entityplayer1, worldserver);
         this.f(entityplayer1);
-        worldserver.getPlayerChunkMap().addPlayer(entityplayer1);
-        worldserver.addEntity(entityplayer1);
-        this.players.add(entityplayer1);
-        this.j.put(entityplayer1.getUniqueID(), entityplayer1);
-        entityplayer1.syncInventory();
+        if (!entityplayer.playerConnection.isDisconnected()) {
+            worldserver.getPlayerChunkMap().addPlayer(entityplayer1);
+            worldserver.addEntity(entityplayer1);
+            this.players.add(entityplayer1);
+            this.j.put(entityplayer1.getUniqueID(), entityplayer1);
+        }
+        // entityplayer1.syncInventory();
         entityplayer1.setHealth(entityplayer1.getHealth());
+        // Added from changeDimension
+        updateClient(entityplayer); // Update health, etc...
+        entityplayer.updateAbilities();
+        for (Object o1 : entityplayer.getEffects()) {
+            MobEffect mobEffect = (MobEffect) o1;
+            entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityEffect(entityplayer.getId(), mobEffect));
+        }
+
+        // Fire advancement trigger
+        CriterionTriggers.v.a(entityplayer, ((CraftWorld) fromWorld).getHandle().worldProvider.getDimensionManager(), worldserver.worldProvider.getDimensionManager());
+        if (((CraftWorld) fromWorld).getHandle().worldProvider.getDimensionManager() == DimensionManager.NETHER && worldserver.worldProvider.getDimensionManager() == DimensionManager.OVERWORLD && entityplayer.M() != null) {
+            CriterionTriggers.C.a(entityplayer, entityplayer.M());
+        }
+
+        // Don't fire on respawn
+        if (fromWorld != location.getWorld()) {
+            PlayerChangedWorldEvent event = new PlayerChangedWorldEvent(entityplayer.getBukkitEntity(), fromWorld);
+            server.server.getPluginManager().callEvent(event);
+        }
+
+        // Save player file again if they were disconnected
+        if (entityplayer.playerConnection.isDisconnected()) {
+            this.savePlayerFile(entityplayer);
+        }
+        // CraftBukkit end
         return entityplayer1;
     }
 
+    // CraftBukkit start - Replaced the standard handling of portals with a more customised method.
+    public void changeDimension(EntityPlayer entityplayer, int i, TeleportCause cause) {
+        WorldServer exitWorld = null;
+        if (entityplayer.dimension < CraftWorld.CUSTOM_DIMENSION_OFFSET) { // plugins must specify exit from custom Bukkit worlds
+            // only target existing worlds (compensate for allow-nether/allow-end as false)
+            for (WorldServer world : this.server.worlds) {
+                if (world.dimension == i) {
+                    exitWorld = world;
+                }
+            }
+        }
+
+        Location enter = entityplayer.getBukkitEntity().getLocation();
+        Location exit = null;
+        boolean useTravelAgent = false; // don't use agent for custom worlds or return from THE_END
+        if (exitWorld != null) {
+            if ((cause == TeleportCause.END_PORTAL) && (i == 0)) {
+                // THE_END -> NORMAL; use bed if available, otherwise default spawn
+                exit = ((org.bukkit.craftbukkit.entity.CraftPlayer) entityplayer.getBukkitEntity()).getBedSpawnLocation();
+                if (exit == null || ((CraftWorld) exit.getWorld()).getHandle().dimension != 0) {
+                    BlockPosition randomSpawn = entityplayer.getSpawnPoint(exitWorld);
+                    exit = new Location(exitWorld.getWorld(), randomSpawn.getX(), randomSpawn.getY(), randomSpawn.getZ());
+                } else {
+                    exit = exit.add(0.5F, 0.1F, 0.5F); // SPIGOT-3879
+                }
+            } else {
+                // NORMAL <-> NETHER or NORMAL -> THE_END
+                exit = this.calculateTarget(enter, exitWorld);
+                useTravelAgent = true;
+            }
+        }
+
+        TravelAgent agent = exit != null ? (TravelAgent) ((CraftWorld) exit.getWorld()).getHandle().getTravelAgent() : org.bukkit.craftbukkit.CraftTravelAgent.DEFAULT; // return arbitrary TA to compensate for implementation dependent plugins
+        PlayerPortalEvent event = new PlayerPortalEvent(entityplayer.getBukkitEntity(), enter, exit, agent, cause);
+        event.useTravelAgent(useTravelAgent);
+        Bukkit.getServer().getPluginManager().callEvent(event);
+        if (event.isCancelled() || event.getTo() == null) {
+            return;
+        }
+
+        exit = event.useTravelAgent() ? event.getPortalTravelAgent().findOrCreate(event.getTo()) : event.getTo();
+        if (exit == null) {
+            return;
+        }
+        exitWorld = ((CraftWorld) exit.getWorld()).getHandle();
+
+        org.bukkit.event.player.PlayerTeleportEvent tpEvent = new org.bukkit.event.player.PlayerTeleportEvent(entityplayer.getBukkitEntity(), enter, exit, cause);
+        Bukkit.getServer().getPluginManager().callEvent(tpEvent);
+        if (tpEvent.isCancelled() || tpEvent.getTo() == null) {
+            return;
+        }
+
+        Vector velocity = entityplayer.getBukkitEntity().getVelocity();
+        exitWorld.getTravelAgent().adjustExit(entityplayer, exit, velocity);
+
+        entityplayer.worldChangeInvuln = true; // CraftBukkit - Set teleport invulnerability only if player changing worlds
+        this.moveToWorld(entityplayer, exitWorld.dimension, true, exit, true); // SPIGOT-3864
+        if (entityplayer.motX != velocity.getX() || entityplayer.motY != velocity.getY() || entityplayer.motZ != velocity.getZ()) {
+            entityplayer.getBukkitEntity().setVelocity(velocity);
+        }
+    }
+
     public void f(EntityPlayer entityplayer) {
         GameProfile gameprofile = entityplayer.getProfile();
         int i = this.server.a(gameprofile);
@@ -499,12 +800,111 @@
     }
 
     public void changeWorld(Entity entity, int i, WorldServer worldserver, WorldServer worldserver1) {
+        // CraftBukkit start - Split into modular functions
+        Location exit = calculateTarget(entity.getBukkitEntity().getLocation(), worldserver1);
+        repositionEntity(entity, exit, true);
+    }
+
+    // Copy of original changeWorld(Entity, int, WorldServer, WorldServer) method with only location calculation logic
+    public Location calculateTarget(Location enter, World target) {
+        WorldServer worldserver = ((CraftWorld) enter.getWorld()).getHandle();
+        WorldServer worldserver1 = ((CraftWorld) target.getWorld()).getHandle();
+        int i = worldserver.dimension;
+
+        double y = enter.getY();
+        float yaw = enter.getYaw();
+        float pitch = enter.getPitch();
+        double d0 = enter.getX();
+        double d1 = enter.getZ();
+         double d2 = 8.0D;
+        /*
         double d0 = entity.locX;
         double d1 = entity.locZ;
         double d2 = 8.0D;
         float f = entity.yaw;
+        */
 
         worldserver.methodProfiler.a("moving");
+        if (worldserver1.dimension == -1) {
+            d0 = MathHelper.a(d0 / d2, worldserver1.getWorldBorder().b()+ 16.0D, worldserver1.getWorldBorder().d() - 16.0D);
+            d1 = MathHelper.a(d1 / d2, worldserver1.getWorldBorder().c() + 16.0D, worldserver1.getWorldBorder().e() - 16.0D);
+            /*
+            entity.setPositionRotation(d0, entity.locY, d1, entity.yaw, entity.pitch);
+            if (entity.isAlive()) {
+                worldserver.entityJoinedWorld(entity, false);
+            }
+            */
+        } else if (worldserver1.dimension == 0) {
+            d0 = MathHelper.a(d0 * d2, worldserver1.getWorldBorder().b() + 16.0D, worldserver1.getWorldBorder().d() - 16.0D);
+            d1 = MathHelper.a(d1 * d2, worldserver1.getWorldBorder().c() + 16.0D, worldserver1.getWorldBorder().e() - 16.0D);
+            /*
+            entity.setPositionRotation(d0, entity.locY, d1, entity.yaw, entity.pitch);
+            if (entity.isAlive()) {
+                worldserver.entityJoinedWorld(entity, false);
+            }
+            */
+        } else {
+            BlockPosition blockposition;
+
+            if (i == 1) {
+                // use default NORMAL world spawn instead of target
+                worldserver1 = this.server.worlds.get(0);
+                blockposition = worldserver1.getSpawn();
+            } else {
+                blockposition = worldserver1.getDimensionSpawn();
+            }
+
+            d0 = (double) blockposition.getX();
+            y = (double) blockposition.getY();
+            d1 = (double) blockposition.getZ();
+            /*
+            entity.setPositionRotation(d0, entity.locY, d1, 90.0F, 0.0F);
+            if (entity.isAlive()) {
+                worldserver.entityJoinedWorld(entity, false);
+            }
+            */
+        }
+
+        worldserver.methodProfiler.b();
+        if (i != 1) {
+            worldserver.methodProfiler.a("placing");
+            d0 = (double) MathHelper.clamp((int) d0, -29999872, 29999872);
+            d1 = (double) MathHelper.clamp((int) d1, -29999872, 29999872);
+            /*
+            if (entity.isAlive()) {
+                entity.setPositionRotation(d0, entity.locY, d1, entity.yaw, entity.pitch);
+                worldserver1.getTravelAgent().a(entity, f);
+                worldserver1.addEntity(entity);
+                worldserver1.entityJoinedWorld(entity, false);
+            }
+            */
+
+            worldserver.methodProfiler.b();
+        }
+
+        // entity.spawnIn(worldserver1);
+        return new Location(worldserver1.getWorld(), d0, y, d1, yaw, pitch);
+    }
+
+    // copy of original a(Entity, int, WorldServer, WorldServer) method with only entity repositioning logic
+    public void repositionEntity(Entity entity, Location exit, boolean portal) {
+        WorldServer worldserver = (WorldServer) entity.world;
+        WorldServer worldserver1 = ((CraftWorld) exit.getWorld()).getHandle();
+        int i = worldserver.dimension;
+
+        /*
+        double d0 = entity.locX;
+        double d1 = entity.locZ;
+        double d2 = 8.0D;
+        float f = entity.yaw;
+        */
+
+        worldserver.methodProfiler.a("moving");
+        entity.setPositionRotation(exit.getX(), exit.getY(), exit.getZ(), exit.getYaw(), exit.getPitch());
+        if (entity.isAlive()) {
+            worldserver.entityJoinedWorld(entity, false);
+        }
+        /*
         if (entity.dimension == -1) {
             d0 = MathHelper.a(d0 / 8.0D, worldserver1.getWorldBorder().b() + 16.0D, worldserver1.getWorldBorder().d() - 16.0D);
             d1 = MathHelper.a(d1 / 8.0D, worldserver1.getWorldBorder().c() + 16.0D, worldserver1.getWorldBorder().e() - 16.0D);
@@ -523,6 +923,8 @@
             BlockPosition blockposition;
 
             if (i == 1) {
+                // use default NORMAL world spawn instead of target
+                worldserver1 = this.server.worlds.get(0);
                 blockposition = worldserver1.getSpawn();
             } else {
                 blockposition = worldserver1.getDimensionSpawn();
@@ -536,16 +938,27 @@
                 worldserver.entityJoinedWorld(entity, false);
             }
         }
+        */
 
         worldserver.methodProfiler.e();
         if (i != 1) {
             worldserver.methodProfiler.a("placing");
+            /*
             d0 = (double) MathHelper.clamp((int) d0, -29999872, 29999872);
             d1 = (double) MathHelper.clamp((int) d1, -29999872, 29999872);
+            */
             if (entity.isAlive()) {
-                entity.setPositionRotation(d0, entity.locY, d1, entity.yaw, entity.pitch);
-                worldserver1.getTravelAgent().a(entity, f);
-                worldserver1.addEntity(entity);
+                // entity.setPositionRotation(d0, entity.locY, d1, entity.yaw, entity.pitch);
+                // worldserver1.getTravelAgent().a(entity, f);
+                if (portal) {
+                    Vector velocity = entity.getBukkitEntity().getVelocity();
+                    worldserver1.getTravelAgent().adjustExit(entity, exit, velocity);
+                    entity.setPositionRotation(exit.getX(), exit.getY(), exit.getZ(), exit.getYaw(), exit.getPitch());
+                    if (entity.motX != velocity.getX() || entity.motY != velocity.getY() || entity.motZ != velocity.getZ()) {
+                        entity.getBukkitEntity().setVelocity(velocity);
+                    }
+                }
+                // worldserver1.addEntity(entity);
                 worldserver1.entityJoinedWorld(entity, false);
             }
 
@@ -553,11 +966,23 @@
         }
 
         entity.spawnIn(worldserver1);
+        // CraftBukkit end
     }
 
     public void tick() {
         if (++this.v > 600) {
-            this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_LATENCY, this.players));
+            // CraftBukkit start
+            for (int i = 0; i < this.players.size(); ++i) {
+                final EntityPlayer target = (EntityPlayer) this.players.get(i);
+
+                target.playerConnection.sendPacket(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_LATENCY, Iterables.filter(this.players, new Predicate<EntityPlayer>() {
+                    @Override
+                    public boolean apply(EntityPlayer input) {
+                        return target.getBukkitEntity().canSee(input.getBukkitEntity());
+                    }
+                })));
+            }
+            // CraftBukkit end
             this.v = 0;
         }
 
@@ -570,6 +995,25 @@
 
     }
 
+    // CraftBukkit start - add a world/entity limited version
+    public void sendAll(Packet packet, EntityHuman entityhuman) {
+        for (int i = 0; i < this.players.size(); ++i) {
+            EntityPlayer entityplayer =  this.players.get(i);
+            if (entityhuman != null && entityhuman instanceof EntityPlayer && !entityplayer.getBukkitEntity().canSee(((EntityPlayer) entityhuman).getBukkitEntity())) {
+                continue;
+            }
+            ((EntityPlayer) this.players.get(i)).playerConnection.sendPacket(packet);
+        }
+    }
+
+    public void sendAll(Packet packet, World world) {
+        for (int i = 0; i < world.players.size(); ++i) {
+            ((EntityPlayer) world.players.get(i)).playerConnection.sendPacket(packet);
+        }
+
+    }
+    // CraftBukkit end
+
     public void a(Packet<?> packet, int i) {
         for (int j = 0; j < this.players.size(); ++j) {
             EntityPlayer entityplayer = (EntityPlayer) this.players.get(j);
@@ -670,6 +1114,7 @@
             entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityStatus(entityplayer, b0));
         }
 
+        entityplayer.getBukkitEntity().recalculatePermissions(); // CraftBukkit
         this.server.getCommandDispatcher().a(entityplayer);
     }
 
@@ -678,7 +1123,7 @@
     }
 
     public boolean isOp(GameProfile gameprofile) {
-        return this.operators.d(gameprofile) || this.server.J() && this.server.worldServer[0].getWorldData().u() && this.server.I().equalsIgnoreCase(gameprofile.getName()) || this.u;
+        return this.operators.d(gameprofile) || this.server.J() && this.server.worlds.get(0).getWorldData().u() && this.server.I().equalsIgnoreCase(gameprofile.getName()) || this.u; // CraftBukkit
     }
 
     @Nullable
@@ -702,6 +1147,12 @@
         for (int j = 0; j < this.players.size(); ++j) {
             EntityPlayer entityplayer = (EntityPlayer) this.players.get(j);
 
+            // CraftBukkit start - Test if player receiving packet can see the source of the packet
+            if (entityhuman != null && entityhuman instanceof EntityPlayer && !entityplayer.getBukkitEntity().canSee(((EntityPlayer) entityhuman).getBukkitEntity())) {
+               continue;
+            }
+            // CraftBukkit end
+
             if (entityplayer != entityhuman && entityplayer.dimension == i) {
                 double d4 = d0 - entityplayer.locX;
                 double d5 = d1 - entityplayer.locY;
@@ -741,7 +1192,7 @@
     public void reloadWhitelist() {}
 
     public void b(EntityPlayer entityplayer, WorldServer worldserver) {
-        WorldBorder worldborder = this.server.worldServer[0].getWorldBorder();
+        WorldBorder worldborder = entityplayer.world.getWorldBorder(); // CraftBukkit
 
         entityplayer.playerConnection.sendPacket(new PacketPlayOutWorldBorder(worldborder, PacketPlayOutWorldBorder.EnumWorldBorderAction.INITIALIZE));
         entityplayer.playerConnection.sendPacket(new PacketPlayOutUpdateTime(worldserver.getTime(), worldserver.getDayTime(), worldserver.getGameRules().getBoolean("doDaylightCycle")));
@@ -749,16 +1200,21 @@
 
         entityplayer.playerConnection.sendPacket(new PacketPlayOutSpawnPosition(blockposition));
         if (worldserver.isRaining()) {
-            entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(1, 0.0F));
-            entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(7, worldserver.i(1.0F)));
-            entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(8, worldserver.g(1.0F)));
+            // CraftBukkit start - handle player weather
+            // entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(1, 0.0F));
+            // entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(7, worldserver.i(1.0F)));
+            // entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(8, worldserver.g(1.0F)));
+            entityplayer.setPlayerWeather(org.bukkit.WeatherType.DOWNFALL, false);
+            entityplayer.updateWeather(-worldserver.o, worldserver.o, -worldserver.q, worldserver.q);
+            // CraftBukkit end
         }
 
     }
 
     public void updateClient(EntityPlayer entityplayer) {
         entityplayer.updateInventory(entityplayer.defaultContainer);
-        entityplayer.triggerHealthUpdate();
+        // entityplayer.triggerHealthUpdate();
+        entityplayer.getBukkitEntity().updateScaledHealth(); // CraftBukkit - Update scaled health on respawn and worldchange
         entityplayer.playerConnection.sendPacket(new PacketPlayOutHeldItemSlot(entityplayer.inventory.itemInHandIndex));
     }
 
@@ -771,7 +1227,7 @@
     }
 
     public String[] getSeenPlayers() {
-        return this.server.worldServer[0].getDataManager().getPlayerFileData().getSeenPlayers();
+        return this.server.worlds.get(0).getDataManager().getPlayerFileData().getSeenPlayers(); // CraftBukkit
     }
 
     public boolean getHasWhitelist() {
@@ -820,26 +1276,39 @@
     }
 
     public void u() {
-        for (int i = 0; i < this.players.size(); ++i) {
-            ((EntityPlayer) this.players.get(i)).playerConnection.disconnect(new ChatMessage("multiplayer.disconnect.server_shutdown", new Object[0]));
+        // CraftBukkit start - disconnect safely
+        for (EntityPlayer player : this.players) {
+            player.playerConnection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
+        // CraftBukkit end
 
     }
 
+    // CraftBukkit start
+    public void sendMessage(IChatBaseComponent[] iChatBaseComponents) {
+        for (IChatBaseComponent component : iChatBaseComponents) {
+            sendMessage(component, true);
+        }
+    }
+    // CraftBukkit end
+
     public void sendMessage(IChatBaseComponent ichatbasecomponent, boolean flag) {
         this.server.sendMessage(ichatbasecomponent);
         ChatMessageType chatmessagetype = flag ? ChatMessageType.SYSTEM : ChatMessageType.CHAT;
 
-        this.sendAll(new PacketPlayOutChat(ichatbasecomponent, chatmessagetype));
+        // CraftBukkit start - we run this through our processor first so we can get web links etc
+        this.sendAll(new PacketPlayOutChat(CraftChatMessage.fixComponent(ichatbasecomponent), chatmessagetype));
+        // CraftBukkit end
     }
 
     public void sendMessage(IChatBaseComponent ichatbasecomponent) {
         this.sendMessage(ichatbasecomponent, true);
     }
 
-    public ServerStatisticManager getStatisticManager(EntityHuman entityhuman) {
+    public ServerStatisticManager getStatisticManager(EntityPlayer entityhuman) {
         UUID uuid = entityhuman.getUniqueID();
-        ServerStatisticManager serverstatisticmanager = uuid == null ? null : (ServerStatisticManager) this.o.get(uuid);
+        ServerStatisticManager serverstatisticmanager = uuid == null ? null : (ServerStatisticManager) entityhuman.getStatisticManager();
+        // CraftBukkit end
 
         if (serverstatisticmanager == null) {
             File file = new File(this.server.a(DimensionManager.OVERWORLD).getDataManager().getDirectory(), "stats");
@@ -854,7 +1323,7 @@
             }
 
             serverstatisticmanager = new ServerStatisticManager(this.server, file1);
-            this.o.put(uuid, serverstatisticmanager);
+            // this.o.put(uuid, serverstatisticmanager); // CraftBukkit
         }
 
         return serverstatisticmanager;
@@ -862,14 +1331,14 @@
 
     public AdvancementDataPlayer h(EntityPlayer entityplayer) {
         UUID uuid = entityplayer.getUniqueID();
-        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) this.p.get(uuid);
+        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) entityplayer.getAdvancementData(); // CraftBukkit
 
         if (advancementdataplayer == null) {
             File file = new File(this.server.a(DimensionManager.OVERWORLD).getDataManager().getDirectory(), "advancements");
             File file1 = new File(file, uuid + ".json");
 
             advancementdataplayer = new AdvancementDataPlayer(this.server, file1, entityplayer);
-            this.p.put(uuid, advancementdataplayer);
+            // this.p.put(uuid, advancementdataplayer); // CraftBukkit
         }
 
         advancementdataplayer.a(entityplayer);
@@ -882,8 +1351,10 @@
             WorldServer[] aworldserver = this.server.worldServer;
             int j = aworldserver.length;
 
-            for (int k = 0; k < j; ++k) {
-                WorldServer worldserver = aworldserver[k];
+            // CraftBukkit start
+            for (int k = 0; k < server.worlds.size(); ++k) {
+                WorldServer worldserver = server.worlds.get(0);
+                // CraftBukkit end
 
                 if (worldserver != null) {
                     worldserver.getPlayerChunkMap().a(i);
@@ -908,13 +1379,20 @@
     }
 
     public void reload() {
-        Iterator iterator = this.p.values().iterator();
+        // CraftBukkit start
+        /*Iterator iterator = this.p.values().iterator();
 
         while (iterator.hasNext()) {
             AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) iterator.next();
 
             advancementdataplayer.b();
+        }*/
+
+        for (EntityPlayer player : players) {
+            player.getAdvancementData().b();
+            player.getAdvancementData().b(player); // CraftBukkit - trigger immediate flush of advancements
         }
+        // CraftBukkit end
 
         this.sendAll(new PacketPlayOutTags(this.server.getTagRegistry()));
         PacketPlayOutRecipeUpdate packetplayoutrecipeupdate = new PacketPlayOutRecipeUpdate(this.server.getCraftingManager().b());