PaperMC/paper-server/nms-patches/net/minecraft/server/players/PlayerList.patch

--- a/net/minecraft/server/players/PlayerList.java
+++ b/net/minecraft/server/players/PlayerList.java
@@ -103,6 +103,27 @@
 import net.minecraft.world.scores.ScoreboardTeam;
 import org.slf4j.Logger;
 
+// CraftBukkit start
+import java.util.stream.Collectors;
+import net.minecraft.server.dedicated.DedicatedServer;
+import net.minecraft.server.network.LoginListener;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.craftbukkit.util.CraftChatMessage;
+import org.bukkit.craftbukkit.util.CraftLocation;
+import org.bukkit.entity.Player;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+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.PlayerRespawnEvent.RespawnReason;
+import org.bukkit.event.player.PlayerSpawnChangeEvent;
+// CraftBukkit end
+
 public abstract class PlayerList {
 
     public static final File USERBANLIST_FILE = new File("banned-players.json");
@@ -115,14 +136,16 @@
     private static final int SEND_PLAYER_INFO_INTERVAL = 600;
     private static final SimpleDateFormat BAN_DATE_FORMAT = 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> playersByUUID = Maps.newHashMap();
     private final GameProfileBanList bans;
     private final IpBanList ipBans;
     private final OpList ops;
     private final WhiteList whitelist;
-    private final Map<UUID, ServerStatisticManager> stats;
-    private final Map<UUID, AdvancementDataPlayer> advancements;
+    // CraftBukkit start
+    // private final Map<UUID, ServerStatisticManager> stats;
+    // private final Map<UUID, AdvancementDataPlayer> advancements;
+    // CraftBukkit end
     public final WorldNBTStorage playerIo;
     private boolean doWhiteList;
     private final LayeredRegistryAccess<RegistryLayer> registries;
@@ -133,13 +156,23 @@
     private static final boolean ALLOW_LOGOUTIVATOR = false;
     private int sendAllPlayerInfoIn;
 
+    // CraftBukkit start
+    private CraftServer cserver;
+
     public PlayerList(MinecraftServer minecraftserver, LayeredRegistryAccess<RegistryLayer> layeredregistryaccess, WorldNBTStorage worldnbtstorage, int i) {
+        this.cserver = minecraftserver.server = new CraftServer((DedicatedServer) minecraftserver, this);
+        minecraftserver.console = org.bukkit.craftbukkit.command.ColouredConsoleSender.getInstance();
+        minecraftserver.reader.addCompleter(new org.bukkit.craftbukkit.command.ConsoleCommandCompleter(minecraftserver.server));
+        // CraftBukkit end
+
         this.bans = new GameProfileBanList(PlayerList.USERBANLIST_FILE);
         this.ipBans = new IpBanList(PlayerList.IPBANLIST_FILE);
         this.ops = new OpList(PlayerList.OPLIST_FILE);
         this.whitelist = new WhiteList(PlayerList.WHITELIST_FILE);
-        this.stats = Maps.newHashMap();
-        this.advancements = Maps.newHashMap();
+        // CraftBukkit start
+        // this.stats = Maps.newHashMap();
+        // this.advancements = Maps.newHashMap();
+        // CraftBukkit end
         this.server = minecraftserver;
         this.registries = layeredregistryaccess;
         this.maxPlayers = i;
@@ -149,25 +182,34 @@
     public void placeNewPlayer(NetworkManager networkmanager, EntityPlayer entityplayer, CommonListenerCookie commonlistenercookie) {
         GameProfile gameprofile = entityplayer.getGameProfile();
         UserCache usercache = this.server.getProfileCache();
-        Optional optional;
+        // Optional optional; // CraftBukkit - decompile error
         String s;
 
         if (usercache != null) {
-            optional = usercache.get(gameprofile.getId());
+            Optional<GameProfile> optional = usercache.get(gameprofile.getId()); // CraftBukkit - decompile error
             s = (String) optional.map(GameProfile::getName).orElse(gameprofile.getName());
             usercache.add(gameprofile);
         } else {
             s = gameprofile.getName();
         }
 
-        optional = this.load(entityplayer);
+        Optional<NBTTagCompound> optional = this.load(entityplayer); // CraftBukkit - decompile error
+        // CraftBukkit start - Better rename detection
+        if (optional.isPresent()) {
+            NBTTagCompound nbttagcompound = optional.get();
+            if (nbttagcompound.contains("bukkit")) {
+                NBTTagCompound bukkit = nbttagcompound.getCompound("bukkit");
+                s = bukkit.contains("lastKnownName", 8) ? bukkit.getString("lastKnownName") : s;
+            }
+        }
+        // CraftBukkit end
         ResourceKey<World> resourcekey = (ResourceKey) optional.flatMap((nbttagcompound) -> {
-            DataResult dataresult = DimensionManager.parseLegacy(new Dynamic(DynamicOpsNBT.INSTANCE, nbttagcompound.get("Dimension")));
+            DataResult<ResourceKey<World>> dataresult = DimensionManager.parseLegacy(new Dynamic(DynamicOpsNBT.INSTANCE, nbttagcompound.get("Dimension"))); // CraftBukkit - decompile error
             Logger logger = PlayerList.LOGGER;
 
             Objects.requireNonNull(logger);
             return dataresult.resultOrPartial(logger::error);
-        }).orElse(World.OVERWORLD);
+        }).orElse(entityplayer.serverLevel().dimension()); // CraftBukkit - SPIGOT-7507: If no dimension, fall back to existing dimension loaded from "WorldUUID", which in turn defaults to World.OVERWORLD
         WorldServer worldserver = this.server.getLevel(resourcekey);
         WorldServer worldserver1;
 
@@ -181,10 +223,11 @@
         entityplayer.setServerLevel(worldserver1);
         String s1 = networkmanager.getLoggableAddress(this.server.logIPs());
 
-        PlayerList.LOGGER.info("{}[{}] logged in with entity id {} at ({}, {}, {})", new Object[]{entityplayer.getName().getString(), s1, entityplayer.getId(), entityplayer.getX(), entityplayer.getY(), entityplayer.getZ()});
+        // CraftBukkit - Moved message to after join
+        // PlayerList.LOGGER.info("{}[{}] logged in with entity id {} at ({}, {}, {})", new Object[]{entityplayer.getName().getString(), s1, entityplayer.getId(), entityplayer.getX(), entityplayer.getY(), entityplayer.getZ()});
         WorldData worlddata = worldserver1.getLevelData();
 
-        entityplayer.loadGameTypes((NBTTagCompound) optional.orElse((Object) null));
+        entityplayer.loadGameTypes((NBTTagCompound) optional.orElse(null)); // CraftBukkit - decompile error
         PlayerConnection playerconnection = new PlayerConnection(this.server, networkmanager, entityplayer, commonlistenercookie);
 
         networkmanager.setupInboundProtocol(GameProtocols.SERVERBOUND.bind(RegistryFriendlyByteBuf.decorator(this.server.registryAccess())), playerconnection);
@@ -194,6 +237,7 @@
         boolean flag2 = gamerules.getBoolean(GameRules.RULE_LIMITED_CRAFTING);
 
         playerconnection.send(new PacketPlayOutLogin(entityplayer.getId(), worlddata.isHardcore(), this.server.levelKeys(), this.getMaxPlayers(), this.viewDistance, this.simulationDistance, flag1, !flag, flag2, entityplayer.createCommonSpawnInfo(worldserver1), this.server.enforceSecureProfile()));
+        entityplayer.getBukkitEntity().sendSupportedChannels(); // CraftBukkit
         playerconnection.send(new PacketPlayOutServerDifficulty(worlddata.getDifficulty(), worlddata.isDifficultyLocked()));
         playerconnection.send(new PacketPlayOutAbilities(entityplayer.getAbilities()));
         playerconnection.send(new PacketPlayOutHeldItemSlot(entityplayer.getInventory().selected));
@@ -210,8 +254,10 @@
         } else {
             ichatmutablecomponent = IChatBaseComponent.translatable("multiplayer.player.joined.renamed", entityplayer.getDisplayName(), s);
         }
+        // CraftBukkit start
+        ichatmutablecomponent.withStyle(EnumChatFormat.YELLOW);
+        String joinMessage = CraftChatMessage.fromComponent(ichatmutablecomponent);
 
-        this.broadcastSystemMessage(ichatmutablecomponent.withStyle(EnumChatFormat.YELLOW), false);
         playerconnection.teleport(entityplayer.getX(), entityplayer.getY(), entityplayer.getZ(), entityplayer.getYRot(), entityplayer.getXRot());
         ServerPing serverping = this.server.getStatus();
 
@@ -219,13 +265,64 @@
             entityplayer.sendServerStatus(serverping);
         }
 
-        entityplayer.connection.send(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(this.players));
+        // entityplayer.connection.send(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(this.players)); // CraftBukkit - replaced with loop below
         this.players.add(entityplayer);
         this.playersByUUID.put(entityplayer.getUUID(), entityplayer);
-        this.broadcastAll(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer)));
+        // this.broadcastAll(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer))); // CraftBukkit - replaced with loop below
+
+        // CraftBukkit start
+        CraftPlayer bukkitPlayer = entityplayer.getBukkitEntity();
+
+        // Ensure that player inventory is populated with its viewer
+        entityplayer.containerMenu.transferTo(entityplayer.containerMenu, bukkitPlayer);
+
+        PlayerJoinEvent playerJoinEvent = new PlayerJoinEvent(bukkitPlayer, joinMessage);
+        cserver.getPluginManager().callEvent(playerJoinEvent);
+
+        if (!entityplayer.connection.isAcceptingMessages()) {
+            return;
+        }
+
+        joinMessage = playerJoinEvent.getJoinMessage();
+
+        if (joinMessage != null && joinMessage.length() > 0) {
+            for (IChatBaseComponent line : org.bukkit.craftbukkit.util.CraftChatMessage.fromString(joinMessage)) {
+                server.getPlayerList().broadcastSystemMessage(line, false);
+            }
+        }
+        // CraftBukkit end
+
+        // CraftBukkit start - sendAll above replaced with this loop
+        ClientboundPlayerInfoUpdatePacket packet = ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer));
+
+        for (int i = 0; i < this.players.size(); ++i) {
+            EntityPlayer entityplayer1 = (EntityPlayer) this.players.get(i);
+
+            if (entityplayer1.getBukkitEntity().canSee(bukkitPlayer)) {
+                entityplayer1.connection.send(packet);
+            }
+
+            if (!bukkitPlayer.canSee(entityplayer1.getBukkitEntity())) {
+                continue;
+            }
+
+            entityplayer.connection.send(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer1)));
+        }
+        entityplayer.sentListPacket = true;
+        // CraftBukkit end
+
+        entityplayer.refreshEntityData(entityplayer); // CraftBukkit - BungeeCord#2321, send complete data to self on spawn
+
         this.sendLevelInfo(entityplayer, worldserver1);
-        worldserver1.addNewPlayer(entityplayer);
-        this.server.getCustomBossEvents().onPlayerConnect(entityplayer);
+
+        // CraftBukkit start - Only add if the player wasn't moved in the event
+        if (entityplayer.level() == worldserver1 && !worldserver1.players().contains(entityplayer)) {
+            worldserver1.addNewPlayer(entityplayer);
+            this.server.getCustomBossEvents().onPlayerConnect(entityplayer);
+        }
+
+        worldserver1 = entityplayer.serverLevel(); // CraftBukkit - Update in case join event changed it
+        // CraftBukkit end
         Iterator iterator = entityplayer.getActiveEffects().iterator();
 
         while (iterator.hasNext()) {
@@ -236,8 +333,9 @@
 
         if (optional.isPresent() && ((NBTTagCompound) optional.get()).contains("RootVehicle", 10)) {
             NBTTagCompound nbttagcompound = ((NBTTagCompound) optional.get()).getCompound("RootVehicle");
+            WorldServer finalWorldServer = worldserver1; // CraftBukkit - decompile error
             Entity entity = EntityTypes.loadEntityRecursive(nbttagcompound.getCompound("Entity"), worldserver1, (entity1) -> {
-                return !worldserver1.addWithUUID(entity1) ? null : entity1;
+                return !finalWorldServer.addWithUUID(entity1) ? null : entity1; // CraftBukkit - decompile error
             });
 
             if (entity != null) {
@@ -268,18 +366,20 @@
 
                 if (!entityplayer.isPassenger()) {
                     PlayerList.LOGGER.warn("Couldn't reattach entity to player");
-                    entity.discard();
+                    entity.discard(null); // CraftBukkit - add Bukkit remove cause
                     iterator1 = entity.getIndirectPassengers().iterator();
 
                     while (iterator1.hasNext()) {
                         entity1 = (Entity) iterator1.next();
-                        entity1.discard();
+                        entity1.discard(null); // CraftBukkit - add Bukkit remove cause
                     }
                 }
             }
         }
 
         entityplayer.initInventoryMenu();
+        // CraftBukkit - Moved from above, added world
+        PlayerList.LOGGER.info("{}[{}] logged in with entity id {} at ([{}]{}, {}, {})", entityplayer.getName().getString(), s1, entityplayer.getId(), worldserver1.serverLevelData.getLevelName(), entityplayer.getX(), entityplayer.getY(), entityplayer.getZ());
     }
 
     public void updateEntireScoreboard(ScoreboardServer scoreboardserver, EntityPlayer entityplayer) {
@@ -316,30 +416,31 @@
     }
 
     public void addWorldborderListener(WorldServer worldserver) {
+        if (playerIo != null) return; // CraftBukkit
         worldserver.getWorldBorder().addListener(new IWorldBorderListener() {
             @Override
             public void onBorderSizeSet(WorldBorder worldborder, double d0) {
-                PlayerList.this.broadcastAll(new ClientboundSetBorderSizePacket(worldborder));
+                PlayerList.this.broadcastAll(new ClientboundSetBorderSizePacket(worldborder), worldborder.world); // CraftBukkit
             }
 
             @Override
             public void onBorderSizeLerping(WorldBorder worldborder, double d0, double d1, long i) {
-                PlayerList.this.broadcastAll(new ClientboundSetBorderLerpSizePacket(worldborder));
+                PlayerList.this.broadcastAll(new ClientboundSetBorderLerpSizePacket(worldborder), worldborder.world); // CraftBukkit
             }
 
             @Override
             public void onBorderCenterSet(WorldBorder worldborder, double d0, double d1) {
-                PlayerList.this.broadcastAll(new ClientboundSetBorderCenterPacket(worldborder));
+                PlayerList.this.broadcastAll(new ClientboundSetBorderCenterPacket(worldborder), worldborder.world); // CraftBukkit
             }
 
             @Override
             public void onBorderSetWarningTime(WorldBorder worldborder, int i) {
-                PlayerList.this.broadcastAll(new ClientboundSetBorderWarningDelayPacket(worldborder));
+                PlayerList.this.broadcastAll(new ClientboundSetBorderWarningDelayPacket(worldborder), worldborder.world); // CraftBukkit
             }
 
             @Override
             public void onBorderSetWarningBlocks(WorldBorder worldborder, int i) {
-                PlayerList.this.broadcastAll(new ClientboundSetBorderWarningDistancePacket(worldborder));
+                PlayerList.this.broadcastAll(new ClientboundSetBorderWarningDistancePacket(worldborder), worldborder.world); // CraftBukkit
             }
 
             @Override
@@ -366,14 +467,15 @@
     }
 
     protected void save(EntityPlayer entityplayer) {
+        if (!entityplayer.getBukkitEntity().isPersistent()) return; // CraftBukkit
         this.playerIo.save(entityplayer);
-        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.stats.get(entityplayer.getUUID());
+        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) entityplayer.getStats(); // CraftBukkit
 
         if (serverstatisticmanager != null) {
             serverstatisticmanager.save();
         }
 
-        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) this.advancements.get(entityplayer.getUUID());
+        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) entityplayer.getAdvancements(); // CraftBukkit
 
         if (advancementdataplayer != null) {
             advancementdataplayer.save();
@@ -381,10 +483,24 @@
 
     }
 
-    public void remove(EntityPlayer entityplayer) {
+    public String remove(EntityPlayer entityplayer) { // CraftBukkit - return string
         WorldServer worldserver = entityplayer.serverLevel();
 
         entityplayer.awardStat(StatisticList.LEAVE_GAME);
+
+        // CraftBukkit start - Quitting must be before we do final save of data, in case plugins need to modify it
+        // See SPIGOT-5799, SPIGOT-6145
+        if (entityplayer.containerMenu != entityplayer.inventoryMenu) {
+            entityplayer.closeContainer();
+        }
+
+        PlayerQuitEvent playerQuitEvent = new PlayerQuitEvent(entityplayer.getBukkitEntity(), entityplayer.kickLeaveMessage != null ? entityplayer.kickLeaveMessage : "\u00A7e" + entityplayer.getScoreboardName() + " left the game");
+        cserver.getPluginManager().callEvent(playerQuitEvent);
+        entityplayer.getBukkitEntity().disconnect(playerQuitEvent.getQuitMessage());
+
+        entityplayer.doTick(); // SPIGOT-924
+        // CraftBukkit end
+
         this.save(entityplayer);
         if (entityplayer.isPassenger()) {
             Entity entity = entityplayer.getRootVehicle();
@@ -393,7 +509,7 @@
                 PlayerList.LOGGER.debug("Removing player mount");
                 entityplayer.stopRiding();
                 entity.getPassengersAndSelf().forEach((entity1) -> {
-                    entity1.setRemoved(Entity.RemovalReason.UNLOADED_WITH_PLAYER);
+                    entity1.setRemoved(Entity.RemovalReason.UNLOADED_WITH_PLAYER, EntityRemoveEvent.Cause.PLAYER_QUIT); // CraftBukkit - add Bukkit remove cause
                 });
             }
         }
@@ -408,17 +524,66 @@
 
         if (entityplayer1 == entityplayer) {
             this.playersByUUID.remove(uuid);
-            this.stats.remove(uuid);
-            this.advancements.remove(uuid);
+            // CraftBukkit start
+            // this.stats.remove(uuid);
+            // this.advancements.remove(uuid);
+            // CraftBukkit end
         }
 
-        this.broadcastAll(new ClientboundPlayerInfoRemovePacket(List.of(entityplayer.getUUID())));
+        // CraftBukkit start
+        // this.broadcastAll(new ClientboundPlayerInfoRemovePacket(List.of(entityplayer.getUUID())));
+        ClientboundPlayerInfoRemovePacket packet = new ClientboundPlayerInfoRemovePacket(List.of(entityplayer.getUUID()));
+        for (int i = 0; i < players.size(); i++) {
+            EntityPlayer entityplayer2 = (EntityPlayer) this.players.get(i);
+
+            if (entityplayer2.getBukkitEntity().canSee(entityplayer.getBukkitEntity())) {
+                entityplayer2.connection.send(packet);
+            } else {
+                entityplayer2.getBukkitEntity().onEntityRemove(entityplayer);
+            }
+        }
+        // This removes the scoreboard (and player reference) for the specific player in the manager
+        cserver.getScoreboardManager().removePlayer(entityplayer.getBukkitEntity());
+        // CraftBukkit end
+
+        return playerQuitEvent.getQuitMessage(); // CraftBukkit
     }
 
-    @Nullable
-    public IChatBaseComponent canPlayerLogin(SocketAddress socketaddress, GameProfile gameprofile) {
+    // CraftBukkit start - Whole method, SocketAddress to LoginListener, added hostname to signature, return EntityPlayer
+    public EntityPlayer canPlayerLogin(LoginListener loginlistener, GameProfile gameprofile) {
         IChatMutableComponent ichatmutablecomponent;
 
+        // Moved from processLogin
+        UUID uuid = gameprofile.getId();
+        List<EntityPlayer> list = Lists.newArrayList();
+
+        EntityPlayer entityplayer;
+
+        for (int i = 0; i < this.players.size(); ++i) {
+            entityplayer = (EntityPlayer) this.players.get(i);
+            if (entityplayer.getUUID().equals(uuid)) {
+                list.add(entityplayer);
+            }
+        }
+
+        Iterator iterator = list.iterator();
+
+        while (iterator.hasNext()) {
+            entityplayer = (EntityPlayer) iterator.next();
+            save(entityplayer); // CraftBukkit - Force the player's inventory to be saved
+            entityplayer.connection.disconnect(IChatBaseComponent.translatable("multiplayer.disconnect.duplicate_login"));
+        }
+
+        // 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.connection.getRemoteAddress();
+
+        EntityPlayer entity = new EntityPlayer(this.server, this.server.getLevel(World.OVERWORLD), gameprofile, ClientInformation.createDefault());
+        entity.transferCookieConnection = loginlistener;
+        Player player = entity.getBukkitEntity();
+        PlayerLoginEvent event = new PlayerLoginEvent(player, loginlistener.connection.hostname, ((java.net.InetSocketAddress) socketaddress).getAddress());
+
         if (this.bans.isBanned(gameprofile)) {
             GameProfileBanEntry gameprofilebanentry = (GameProfileBanEntry) this.bans.get(gameprofile);
 
@@ -427,9 +592,11 @@
                 ichatmutablecomponent.append((IChatBaseComponent) IChatBaseComponent.translatable("multiplayer.disconnect.banned.expiration", PlayerList.BAN_DATE_FORMAT.format(gameprofilebanentry.getExpires())));
             }
 
-            return ichatmutablecomponent;
+            // return chatmessage;
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(ichatmutablecomponent));
         } else if (!this.isWhiteListed(gameprofile)) {
-            return IChatBaseComponent.translatable("multiplayer.disconnect.not_whitelisted");
+            ichatmutablecomponent = IChatBaseComponent.translatable("multiplayer.disconnect.not_whitelisted");
+            event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, CraftChatMessage.fromComponent(ichatmutablecomponent));
         } else if (this.ipBans.isBanned(socketaddress)) {
             IpBanEntry ipbanentry = this.ipBans.get(socketaddress);
 
@@ -438,17 +605,32 @@
                 ichatmutablecomponent.append((IChatBaseComponent) IChatBaseComponent.translatable("multiplayer.disconnect.banned_ip.expiration", PlayerList.BAN_DATE_FORMAT.format(ipbanentry.getExpires())));
             }
 
-            return ichatmutablecomponent;
+            // return chatmessage;
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(ichatmutablecomponent));
         } else {
-            return this.players.size() >= this.maxPlayers && !this.canBypassPlayerLimit(gameprofile) ? IChatBaseComponent.translatable("multiplayer.disconnect.server_full") : null;
+            // return this.players.size() >= this.maxPlayers && !this.canBypassPlayerLimit(gameprofile) ? IChatBaseComponent.translatable("multiplayer.disconnect.server_full") : null;
+            if (this.players.size() >= this.maxPlayers && !this.canBypassPlayerLimit(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 getPlayerForLogin(GameProfile gameprofile, ClientInformation clientinformation) {
-        return new EntityPlayer(this.server, this.server.overworld(), gameprofile, clientinformation);
+    // CraftBukkit start - added EntityPlayer
+    public EntityPlayer getPlayerForLogin(GameProfile gameprofile, ClientInformation clientinformation, EntityPlayer player) {
+        player.updateOptions(clientinformation);
+        return player;
+        // CraftBukkit end
     }
 
-    public boolean disconnectAllPlayersWithProfile(GameProfile gameprofile) {
+    public boolean disconnectAllPlayersWithProfile(GameProfile gameprofile, EntityPlayer player) { // CraftBukkit - added EntityPlayer
+        /* CraftBukkit startMoved up
         UUID uuid = gameprofile.getId();
         Set<EntityPlayer> set = Sets.newIdentityHashSet();
         Iterator iterator = this.players.iterator();
@@ -476,14 +658,24 @@
         }
 
         return !set.isEmpty();
+        */
+        return player == null;
+        // CraftBukkit end
     }
 
-    public EntityPlayer respawn(EntityPlayer entityplayer, boolean flag) {
+    // CraftBukkit start
+    public EntityPlayer respawn(EntityPlayer entityplayer, boolean flag, RespawnReason reason) {
+        return this.respawn(entityplayer, this.server.getLevel(entityplayer.getRespawnDimension()), flag, null, true, reason);
+    }
+
+    public EntityPlayer respawn(EntityPlayer entityplayer, WorldServer worldserver, boolean flag, Location location, boolean avoidSuffocation, RespawnReason reason) {
+        entityplayer.stopRiding(); // CraftBukkit
         this.players.remove(entityplayer);
         entityplayer.serverLevel().removePlayerImmediately(entityplayer, Entity.RemovalReason.DISCARDED);
         BlockPosition blockposition = entityplayer.getRespawnPosition();
         float f = entityplayer.getRespawnAngle();
         boolean flag1 = entityplayer.isRespawnForced();
+        /* CraftBukkit start
         WorldServer worldserver = this.server.getLevel(entityplayer.getRespawnDimension());
         Optional optional;
 
@@ -495,6 +687,11 @@
 
         WorldServer worldserver1 = worldserver != null && optional.isPresent() ? worldserver : this.server.overworld();
         EntityPlayer entityplayer1 = new EntityPlayer(this.server, worldserver1, entityplayer.getGameProfile(), entityplayer.clientInformation());
+        // */
+        EntityPlayer entityplayer1 = entityplayer;
+        org.bukkit.World fromWorld = entityplayer.getBukkitEntity().getWorld();
+        entityplayer.wonGame = false;
+        // CraftBukkit end
 
         entityplayer1.connection = entityplayer.connection;
         entityplayer1.restoreFrom(entityplayer, flag);
@@ -510,28 +707,66 @@
 
         boolean flag2 = false;
 
-        if (optional.isPresent()) {
-            IBlockData iblockdata = worldserver1.getBlockState(blockposition);
-            boolean flag3 = iblockdata.is(Blocks.RESPAWN_ANCHOR);
-            Vec3D vec3d = (Vec3D) optional.get();
-            float f1;
+        // CraftBukkit start - fire PlayerRespawnEvent
+        if (location == null) {
+            boolean isBedSpawn = false;
+            WorldServer worldserver1 = this.server.getLevel(entityplayer.getRespawnDimension());
+            if (worldserver1 != null) {
+                Optional optional;
 
-            if (!iblockdata.is(TagsBlock.BEDS) && !flag3) {
-                f1 = f;
-            } else {
-                Vec3D vec3d1 = Vec3D.atBottomCenterOf(blockposition).subtract(vec3d).normalize();
+                if (blockposition != null) {
+                    optional = EntityHuman.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, flag);
+                } else {
+                    optional = Optional.empty();
+                }
 
-                f1 = (float) MathHelper.wrapDegrees(MathHelper.atan2(vec3d1.z, vec3d1.x) * 57.2957763671875D - 90.0D);
+                if (optional.isPresent()) {
+                    IBlockData iblockdata = worldserver1.getBlockState(blockposition);
+                    boolean flag3 = iblockdata.is(Blocks.RESPAWN_ANCHOR);
+                    Vec3D vec3d = (Vec3D) optional.get();
+                    float f1;
+
+                    if (!iblockdata.is(TagsBlock.BEDS) && !flag3) {
+                        f1 = f;
+                    } else {
+                        Vec3D vec3d1 = Vec3D.atBottomCenterOf(blockposition).subtract(vec3d).normalize();
+
+                        f1 = (float) MathHelper.wrapDegrees(MathHelper.atan2(vec3d1.z, vec3d1.x) * 57.2957763671875D - 90.0D);
+                    }
+
+                    // entityplayer1.setRespawnPosition(worldserver1.dimension(), blockposition, f, flag1, false); // CraftBukkit - not required, just copies old location into reused entity
+                    flag2 = !flag && flag3;
+                    isBedSpawn = true;
+                    location = CraftLocation.toBukkit(vec3d, worldserver1.getWorld(), f1, 0.0F);
+                } else if (blockposition != null) {
+                    entityplayer1.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.NO_RESPAWN_BLOCK_AVAILABLE, 0.0F));
+                    entityplayer1.setRespawnPosition(null, null, 0f, false, false, PlayerSpawnChangeEvent.Cause.RESET); // CraftBukkit - SPIGOT-5988: Clear respawn location when obstructed
+                }
             }
 
-            entityplayer1.moveTo(vec3d.x, vec3d.y, vec3d.z, f1, 0.0F);
-            entityplayer1.setRespawnPosition(worldserver1.dimension(), blockposition, f, flag1, false);
-            flag2 = !flag && flag3;
-        } else if (blockposition != null) {
-            entityplayer1.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.NO_RESPAWN_BLOCK_AVAILABLE, 0.0F));
+            if (location == null) {
+                worldserver1 = this.server.getLevel(World.OVERWORLD);
+                blockposition = entityplayer1.getSpawnPoint(worldserver1);
+                location = CraftLocation.toBukkit(blockposition, worldserver1.getWorld()).add(0.5F, 0.1F, 0.5F);
+            }
+
+            Player respawnPlayer = entityplayer1.getBukkitEntity();
+            PlayerRespawnEvent respawnEvent = new PlayerRespawnEvent(respawnPlayer, location, isBedSpawn && !flag2, flag2, reason);
+            cserver.getPluginManager().callEvent(respawnEvent);
+
+            location = respawnEvent.getRespawnLocation();
+            if (!flag) entityplayer.reset(); // SPIGOT-4785
+        } else {
+            location.setWorld(worldserver.getWorld());
         }
+        WorldServer worldserver1 = ((CraftWorld) location.getWorld()).getHandle();
+        entityplayer1.spawnIn(worldserver1);
+        entityplayer1.unsetRemoved();
+        entityplayer1.setShiftKeyDown(false);
+        entityplayer1.forceSetPositionRotation(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
 
-        while (!worldserver1.noCollision((Entity) entityplayer1) && entityplayer1.getY() < (double) worldserver1.getMaxBuildHeight()) {
+        while (avoidSuffocation && !worldserver1.noCollision((Entity) entityplayer1) && entityplayer1.getY() < (double) worldserver1.getMaxBuildHeight()) {
+            // CraftBukkit end
             entityplayer1.setPos(entityplayer1.getX(), entityplayer1.getY() + 1.0D, entityplayer1.getZ());
         }
 
@@ -540,21 +775,43 @@
         WorldData worlddata = worldserver2.getLevelData();
 
         entityplayer1.connection.send(new PacketPlayOutRespawn(entityplayer1.createCommonSpawnInfo(worldserver2), (byte) i));
-        entityplayer1.connection.teleport(entityplayer1.getX(), entityplayer1.getY(), entityplayer1.getZ(), entityplayer1.getYRot(), entityplayer1.getXRot());
+        entityplayer1.connection.teleport(CraftLocation.toBukkit(entityplayer1.position(), worldserver2.getWorld(), entityplayer1.getYRot(), entityplayer1.getXRot())); // CraftBukkit
         entityplayer1.connection.send(new PacketPlayOutSpawnPosition(worldserver1.getSharedSpawnPos(), worldserver1.getSharedSpawnAngle()));
         entityplayer1.connection.send(new PacketPlayOutServerDifficulty(worlddata.getDifficulty(), worlddata.isDifficultyLocked()));
         entityplayer1.connection.send(new PacketPlayOutExperience(entityplayer1.experienceProgress, entityplayer1.totalExperience, entityplayer1.experienceLevel));
         this.sendLevelInfo(entityplayer1, worldserver1);
         this.sendPlayerPermissionLevel(entityplayer1);
-        worldserver1.addRespawnedPlayer(entityplayer1);
-        this.players.add(entityplayer1);
-        this.playersByUUID.put(entityplayer1.getUUID(), entityplayer1);
-        entityplayer1.initInventoryMenu();
+        if (!entityplayer.connection.isDisconnected()) {
+            worldserver1.addRespawnedPlayer(entityplayer1);
+            this.players.add(entityplayer1);
+            this.playersByUUID.put(entityplayer1.getUUID(), entityplayer1);
+        }
+        // entityplayer1.initInventoryMenu();
         entityplayer1.setHealth(entityplayer1.getHealth());
         if (flag2) {
             entityplayer1.connection.send(new PacketPlayOutNamedSoundEffect(SoundEffects.RESPAWN_ANCHOR_DEPLETE, SoundCategory.BLOCKS, (double) blockposition.getX(), (double) blockposition.getY(), (double) blockposition.getZ(), 1.0F, 1.0F, worldserver1.getRandom().nextLong()));
         }
+        // Added from changeDimension
+        sendAllPlayerInfo(entityplayer); // Update health, etc...
+        entityplayer.onUpdateAbilities();
+        for (MobEffect mobEffect : entityplayer.getActiveEffects()) {
+            entityplayer.connection.send(new PacketPlayOutEntityEffect(entityplayer.getId(), mobEffect, false)); // blend = false
+        }
+
+        // Fire advancement trigger
+        entityplayer.triggerDimensionChangeTriggers(((CraftWorld) fromWorld).getHandle());
+
+        // 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.connection.isDisconnected()) {
+            this.save(entityplayer);
+        }
+        // CraftBukkit end
         return entityplayer1;
     }
 
@@ -567,7 +824,18 @@
 
     public void tick() {
         if (++this.sendAllPlayerInfoIn > 600) {
-            this.broadcastAll(new ClientboundPlayerInfoUpdatePacket(EnumSet.of(ClientboundPlayerInfoUpdatePacket.a.UPDATE_LATENCY), this.players));
+            // CraftBukkit start
+            for (int i = 0; i < this.players.size(); ++i) {
+                final EntityPlayer target = (EntityPlayer) this.players.get(i);
+
+                target.connection.send(new ClientboundPlayerInfoUpdatePacket(EnumSet.of(ClientboundPlayerInfoUpdatePacket.a.UPDATE_LATENCY), this.players.stream().filter(new Predicate<EntityPlayer>() {
+                    @Override
+                    public boolean test(EntityPlayer input) {
+                        return target.getBukkitEntity().canSee(input.getBukkitEntity());
+                    }
+                }).collect(Collectors.toList())));
+            }
+            // CraftBukkit end
             this.sendAllPlayerInfoIn = 0;
         }
 
@@ -584,6 +852,25 @@
 
     }
 
+    // CraftBukkit start - add a world/entity limited version
+    public void broadcastAll(Packet packet, EntityHuman entityhuman) {
+        for (int i = 0; i < this.players.size(); ++i) {
+            EntityPlayer entityplayer =  this.players.get(i);
+            if (entityhuman != null && !entityplayer.getBukkitEntity().canSee(entityhuman.getBukkitEntity())) {
+                continue;
+            }
+            ((EntityPlayer) this.players.get(i)).connection.send(packet);
+        }
+    }
+
+    public void broadcastAll(Packet packet, World world) {
+        for (int i = 0; i < world.players().size(); ++i) {
+            ((EntityPlayer) world.players().get(i)).connection.send(packet);
+        }
+
+    }
+    // CraftBukkit end
+
     public void broadcastAll(Packet<?> packet, ResourceKey<World> resourcekey) {
         Iterator iterator = this.players.iterator();
 
@@ -662,7 +949,7 @@
     }
 
     public void deop(GameProfile gameprofile) {
-        this.ops.remove((Object) gameprofile);
+        this.ops.remove(gameprofile); // CraftBukkit - decompile error
         EntityPlayer entityplayer = this.getPlayer(gameprofile.getId());
 
         if (entityplayer != null) {
@@ -686,6 +973,7 @@
             entityplayer.connection.send(new PacketPlayOutEntityStatus(entityplayer, b0));
         }
 
+        entityplayer.getBukkitEntity().recalculatePermissions(); // CraftBukkit
         this.server.getCommands().sendCommands(entityplayer);
     }
 
@@ -716,6 +1004,12 @@
         for (int i = 0; i < this.players.size(); ++i) {
             EntityPlayer entityplayer = (EntityPlayer) this.players.get(i);
 
+            // CraftBukkit start - Test if player receiving packet can see the source of the packet
+            if (entityhuman != null && !entityplayer.getBukkitEntity().canSee(entityhuman.getBukkitEntity())) {
+               continue;
+            }
+            // CraftBukkit end
+
             if (entityplayer != entityhuman && entityplayer.level().dimension() == resourcekey) {
                 double d4 = d0 - entityplayer.getX();
                 double d5 = d1 - entityplayer.getY();
@@ -755,15 +1049,19 @@
     public void reloadWhiteList() {}
 
     public void sendLevelInfo(EntityPlayer entityplayer, WorldServer worldserver) {
-        WorldBorder worldborder = this.server.overworld().getWorldBorder();
+        WorldBorder worldborder = entityplayer.level().getWorldBorder(); // CraftBukkit
 
         entityplayer.connection.send(new ClientboundInitializeBorderPacket(worldborder));
         entityplayer.connection.send(new PacketPlayOutUpdateTime(worldserver.getGameTime(), worldserver.getDayTime(), worldserver.getGameRules().getBoolean(GameRules.RULE_DAYLIGHT)));
         entityplayer.connection.send(new PacketPlayOutSpawnPosition(worldserver.getSharedSpawnPos(), worldserver.getSharedSpawnAngle()));
         if (worldserver.isRaining()) {
-            entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.START_RAINING, 0.0F));
-            entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.RAIN_LEVEL_CHANGE, worldserver.getRainLevel(1.0F)));
-            entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.THUNDER_LEVEL_CHANGE, worldserver.getThunderLevel(1.0F)));
+            // CraftBukkit start - handle player weather
+            // entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.START_RAINING, 0.0F));
+            // entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.RAIN_LEVEL_CHANGE, worldserver.getRainLevel(1.0F)));
+            // entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.THUNDER_LEVEL_CHANGE, worldserver.getThunderLevel(1.0F)));
+            entityplayer.setPlayerWeather(org.bukkit.WeatherType.DOWNFALL, false);
+            entityplayer.updateWeather(-worldserver.rainLevel, worldserver.rainLevel, -worldserver.thunderLevel, worldserver.thunderLevel);
+            // CraftBukkit end
         }
 
         entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.LEVEL_CHUNKS_LOAD_START, 0.0F));
@@ -772,8 +1070,16 @@
 
     public void sendAllPlayerInfo(EntityPlayer entityplayer) {
         entityplayer.inventoryMenu.sendAllDataToRemote();
-        entityplayer.resetSentInfo();
+        // entityplayer.resetSentInfo();
+        entityplayer.getBukkitEntity().updateScaledHealth(); // CraftBukkit - Update scaled health on respawn and worldchange
+        entityplayer.refreshEntityData(entityplayer); // CraftBukkkit - SPIGOT-7218: sync metadata
         entityplayer.connection.send(new PacketPlayOutHeldItemSlot(entityplayer.getInventory().selected));
+        // CraftBukkit start - from GameRules
+        int i = entityplayer.level().getGameRules().getBoolean(GameRules.RULE_REDUCEDDEBUGINFO) ? 22 : 23;
+        entityplayer.connection.send(new PacketPlayOutEntityStatus(entityplayer, (byte) i));
+        float immediateRespawn = entityplayer.level().getGameRules().getBoolean(GameRules.RULE_DO_IMMEDIATE_RESPAWN) ? 1.0F: 0.0F;
+        entityplayer.connection.send(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.IMMEDIATE_RESPAWN, immediateRespawn));
+        // CraftBukkit end
     }
 
     public int getPlayerCount() {
@@ -829,12 +1135,22 @@
     }
 
     public void removeAll() {
-        for (int i = 0; i < this.players.size(); ++i) {
-            ((EntityPlayer) this.players.get(i)).connection.disconnect(IChatBaseComponent.translatable("multiplayer.disconnect.server_shutdown"));
+        // CraftBukkit start - disconnect safely
+        for (EntityPlayer player : this.players) {
+            player.connection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
+        // CraftBukkit end
 
     }
 
+    // CraftBukkit start
+    public void broadcastMessage(IChatBaseComponent[] iChatBaseComponents) {
+        for (IChatBaseComponent component : iChatBaseComponents) {
+            broadcastSystemMessage(component, false);
+        }
+    }
+    // CraftBukkit end
+
     public void broadcastSystemMessage(IChatBaseComponent ichatbasecomponent, boolean flag) {
         this.broadcastSystemMessage(ichatbasecomponent, (entityplayer) -> {
             return ichatbasecomponent;
@@ -892,16 +1208,23 @@
         return playerchatmessage.hasSignature() && !playerchatmessage.hasExpiredServer(Instant.now());
     }
 
-    public ServerStatisticManager getPlayerStats(EntityHuman entityhuman) {
-        UUID uuid = entityhuman.getUUID();
-        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.stats.get(uuid);
+    // CraftBukkit start
+    public ServerStatisticManager getPlayerStats(EntityPlayer entityhuman) {
+        ServerStatisticManager serverstatisticmanager = entityhuman.getStats();
+        return serverstatisticmanager == null ? getPlayerStats(entityhuman.getUUID(), entityhuman.getDisplayName().getString()) : serverstatisticmanager;
+    }
+
+    public ServerStatisticManager getPlayerStats(UUID uuid, String displayName) {
+        EntityPlayer entityhuman = this.getPlayer(uuid);
+        ServerStatisticManager serverstatisticmanager = entityhuman == null ? null : (ServerStatisticManager) entityhuman.getStats();
+        // CraftBukkit end
 
         if (serverstatisticmanager == null) {
             File file = this.server.getWorldPath(SavedFile.PLAYER_STATS_DIR).toFile();
             File file1 = new File(file, String.valueOf(uuid) + ".json");
 
             if (!file1.exists()) {
-                File file2 = new File(file, entityhuman.getName().getString() + ".json");
+                File file2 = new File(file, displayName + ".json"); // CraftBukkit
                 Path path = file2.toPath();
 
                 if (FileUtils.isPathNormalized(path) && FileUtils.isPathPortable(path) && path.startsWith(file.getPath()) && file2.isFile()) {
@@ -910,7 +1233,7 @@
             }
 
             serverstatisticmanager = new ServerStatisticManager(this.server, file1);
-            this.stats.put(uuid, serverstatisticmanager);
+            // this.stats.put(uuid, serverstatisticmanager); // CraftBukkit
         }
 
         return serverstatisticmanager;
@@ -918,13 +1241,13 @@
 
     public AdvancementDataPlayer getPlayerAdvancements(EntityPlayer entityplayer) {
         UUID uuid = entityplayer.getUUID();
-        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) this.advancements.get(uuid);
+        AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) entityplayer.getAdvancements(); // CraftBukkit
 
         if (advancementdataplayer == null) {
             Path path = this.server.getWorldPath(SavedFile.PLAYER_ADVANCEMENTS_DIR).resolve(String.valueOf(uuid) + ".json");
 
             advancementdataplayer = new AdvancementDataPlayer(this.server.getFixerUpper(), this, this.server.getAdvancements(), path, entityplayer);
-            this.advancements.put(uuid, advancementdataplayer);
+            // this.advancements.put(uuid, advancementdataplayer); // CraftBukkit
         }
 
         advancementdataplayer.setPlayer(entityplayer);
@@ -975,13 +1298,20 @@
     }
 
     public void reloadResources() {
-        Iterator iterator = this.advancements.values().iterator();
+        // CraftBukkit start
+        /*Iterator iterator = this.advancements.values().iterator();
 
         while (iterator.hasNext()) {
             AdvancementDataPlayer advancementdataplayer = (AdvancementDataPlayer) iterator.next();
 
             advancementdataplayer.reload(this.server.getAdvancements());
+        }*/
+
+        for (EntityPlayer player : players) {
+            player.getAdvancements().reload(this.server.getAdvancements());
+            player.getAdvancements().flushDirty(player); // CraftBukkit - trigger immediate flush of advancements
         }
+        // CraftBukkit end
 
         this.broadcastAll(new ClientboundUpdateTagsPacket(TagNetworkSerialization.serializeTagsToNetwork(this.registries)));
         PacketPlayOutRecipeUpdate packetplayoutrecipeupdate = new PacketPlayOutRecipeUpdate(this.server.getRecipeManager().getOrderedRecipes());