Java Code Examples for us.myles.ViaVersion.api.remapper.PacketHandler

/**
 * Returns a packethandler to track and rewrite an entity.
 *
 * @param metaType type of the metadata list
 * @return handler for tracking and rewriting entities
 */
public PacketHandler getTrackerAndRewriter(@Nullable Type<List<Metadata>> metaType) {
    return wrapper -> {
        int entityId = wrapper.get(Type.VAR_INT, 0);
        int type = wrapper.get(Type.VAR_INT, 1);

        int newType = getNewEntityId(type);
        if (newType != type) {
            wrapper.set(Type.VAR_INT, 1, newType);
        }

        EntityType entType = getTypeFromId(newType);
        // Register Type ID
        wrapper.user().get(entityTrackerClass).addEntity(entityId, entType);

        if (metaType != null) {
            handleMetadata(entityId, wrapper.get(metaType, 0), wrapper.user());
        }
    };
}
 

public static void register(Protocol protocol) {
    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PARTICLE, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.INT); // 0 - Particle ID
            map(Type.BOOLEAN); // 1 - Long Distance
            map(Type.FLOAT); // 2 - X
            map(Type.FLOAT); // 3 - Y
            map(Type.FLOAT); // 4 - Z
            map(Type.FLOAT); // 5 - Offset X
            map(Type.FLOAT); // 6 - Offset Y
            map(Type.FLOAT); // 7 - Offset Z
            map(Type.FLOAT); // 8 - Particle Data
            map(Type.INT); // 9 - Particle Count
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int id = wrapper.get(Type.INT, 0);
                    if (id == 27) {
                        wrapper.write(Type.FLAT_VAR_INT_ITEM, wrapper.read(Type.FLAT_ITEM));
                    }
                }
            });
        }
    });
}
 

protected PacketHandler getMobSpawnRewriter(Type<List<Metadata>> metaType) {
    return wrapper -> {
        int entityId = wrapper.get(Type.VAR_INT, 0);
        EntityType type = getEntityType(wrapper.user(), entityId);

        MetaStorage storage = new MetaStorage(wrapper.get(metaType, 0));
        handleMeta(wrapper.user(), entityId, storage);

        EntityData entityData = getEntityData(type);
        if (entityData != null) {
            wrapper.set(Type.VAR_INT, 1, entityData.getReplacementId());
            if (entityData.hasBaseMeta()) {
                entityData.getDefaultMeta().createMeta(storage);
            }
        }

        // Rewrite Metadata
        wrapper.set(metaType, 0, storage.getMetaDataList());
    };
}
 

protected PacketHandler getObjectRewriter(Function<Byte, ObjectType> objectGetter) {
    return wrapper -> {
        ObjectType type = objectGetter.apply(wrapper.get(Type.BYTE, 0));
        if (type == null) {
            ViaBackwards.getPlatform().getLogger().warning("Could not find Entity Type" + wrapper.get(Type.BYTE, 0));
            return;
        }

        EntityData data = getObjectData(type);
        if (data != null) {
            wrapper.set(Type.BYTE, 0, (byte) data.getReplacementId());
            if (data.getObjectData() != -1) {
                wrapper.set(Type.INT, 0, data.getObjectData());
            }
        }
    };
}
 

public static void register(Protocol protocol) {
	/*  OUTGOING  */

	//Display Scoreboard
	protocol.registerOutgoing(State.PLAY, 0x38, 0x3D);

	//Scoreboard Objective
	protocol.registerOutgoing(State.PLAY, 0x3F, 0x3B);

	//Scoreboard Team
	protocol.registerOutgoing(State.PLAY, 0x41, 0x3E, new PacketRemapper() {
		@Override
		public void registerMap() {
			map(Type.STRING);
			map(Type.BYTE);
			handler(new PacketHandler() {
				@Override
				public void handle(PacketWrapper packetWrapper) throws Exception {
					byte mode = packetWrapper.get(Type.BYTE, 0);
					if (mode == 0 || mode == 2) {
						packetWrapper.passthrough(Type.STRING);  //Display Name
						packetWrapper.passthrough(Type.STRING);  //Prefix
						packetWrapper.passthrough(Type.STRING);  //Suffix
						packetWrapper.passthrough(Type.BYTE);  //Friendly Flags
						packetWrapper.passthrough(Type.STRING);  //Name Tag Visibility
						packetWrapper.read(Type.STRING);  //Skip Collision Rule
						packetWrapper.passthrough(Type.BYTE);  //Friendly Flags
					}

					if (mode == 0 || mode == 3 || mode == 4) {
						packetWrapper.passthrough(Type.STRING_ARRAY);
					}
				}
			});
		}
	});

	//Update Score
	protocol.registerOutgoing(State.PLAY, 0x42, 0x3C);
}
 

public PacketHandler itemArrayHandler(Type<Item[]> type) {
    return wrapper -> {
        Item[] items = wrapper.get(type, 0);
        for (Item item : items) {
            toClient.rewrite(item);
        }
    };
}
 

public PacketHandler getTrackerAndRewriter(@Nullable Type<List<Metadata>> metaType, EntityType entityType) {
    return wrapper -> {
        int entityId = wrapper.get(Type.VAR_INT, 0);
        // Register Type ID
        wrapper.user().get(entityTrackerClass).addEntity(entityId, entityType);

        if (metaType != null) {
            handleMetadata(entityId, wrapper.get(metaType, 0), wrapper.user());
        }
    };
}
 

/**
 * Returns a packethandler to track an object entity.
 *
 * @return handler for tracking and rewriting entities
 */
public PacketHandler getObjectTracker() {
    return wrapper -> {
        int entityId = wrapper.get(Type.VAR_INT, 0);
        byte type = wrapper.get(Type.BYTE, 0);

        EntityType entType = getObjectTypeFromId(type);
        // Register Type ID
        wrapper.user().get(entityTrackerClass).addEntity(entityId, entType);
    };
}
 

@Override
protected void registerPackets() {
    registerOutgoing(ClientboundPackets1_14.TRADE_LIST, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    wrapper.passthrough(Type.VAR_INT);
                    int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                    for (int i = 0; i < size; i++) {
                        wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        if (wrapper.passthrough(Type.BOOLEAN)) {
                            wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        }
                        wrapper.passthrough(Type.BOOLEAN);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.FLOAT);
                        wrapper.write(Type.INT, 0); // demand value added in pre5
                    }
                }
            });
        }
    });
}
 

@Override
protected void registerPackets() {
    // Currently supports 1.9.1 and 1.9.2

    registerOutgoing(ClientboundPackets1_9.JOIN_GAME, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.INT); // 0 - Player ID
            map(Type.UNSIGNED_BYTE); // 1 - Player Gamemode
            // 1.9.1 PRE 2 Changed this
            map(Type.INT, Type.BYTE); // 2 - Player Dimension
            map(Type.UNSIGNED_BYTE); // 3 - World Difficulty
            map(Type.UNSIGNED_BYTE); // 4 - Max Players (Tab)
            map(Type.STRING); // 5 - Level Type
            map(Type.BOOLEAN); // 6 - Reduced Debug info
        }
    });

    registerOutgoing(ClientboundPackets1_9.SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Sound ID

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int sound = wrapper.get(Type.VAR_INT, 0);

                    if (sound == 415) // Stop the Elytra sound for 1.9 (It's introduced in 1.9.2)
                        wrapper.cancel();
                    else if (sound >= 416) // Act like the Elytra sound never existed
                        wrapper.set(Type.VAR_INT, 0, sound - 1);
                }
            });
        }
    });
}
 

@Override
protected void registerPackets() {
    registerOutgoing(ClientboundPackets1_14.TRADE_LIST, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    wrapper.passthrough(Type.VAR_INT);
                    int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                    for (int i = 0; i < size; i++) {
                        wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        if (wrapper.passthrough(Type.BOOLEAN)) {
                            wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                        }
                        wrapper.passthrough(Type.BOOLEAN);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.INT);
                        wrapper.passthrough(Type.FLOAT);
                    }
                    wrapper.passthrough(Type.VAR_INT);
                    wrapper.passthrough(Type.VAR_INT);
                    boolean regularVillager = wrapper.passthrough(Type.BOOLEAN);
                    wrapper.write(Type.BOOLEAN, regularVillager); // new boolean added in pre-1
                }
            });
        }
    });
}
 

@Override
protected void registerPackets() {
    // Currently supports 1.9.1 and 1.9.2

    registerOutgoing(ClientboundPackets1_9.JOIN_GAME, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.INT); // 0 - Player ID
            map(Type.UNSIGNED_BYTE); // 1 - Player Gamemode
            // 1.9.1 PRE 2 Changed this
            map(Type.BYTE, Type.INT); // 2 - Player Dimension
            map(Type.UNSIGNED_BYTE); // 3 - World Difficulty
            map(Type.UNSIGNED_BYTE); // 4 - Max Players (Tab)
            map(Type.STRING); // 5 - Level Type
            map(Type.BOOLEAN); // 6 - Reduced Debug info
        }
    });

    registerOutgoing(ClientboundPackets1_9.SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Sound ID

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int sound = wrapper.get(Type.VAR_INT, 0);

                    if (sound >= 415) // Add 1 to every sound id since there is no Elytra sound on a 1.9 server
                        wrapper.set(Type.VAR_INT, 0, sound + 1);
                }
            });
        }
    });
}
 

public static void register(Protocol1_13_1To1_13_2 protocol) {
    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PARTICLE, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.INT); // 0 - Particle ID
            map(Type.BOOLEAN); // 1 - Long Distance
            map(Type.FLOAT); // 2 - X
            map(Type.FLOAT); // 3 - Y
            map(Type.FLOAT); // 4 - Z
            map(Type.FLOAT); // 5 - Offset X
            map(Type.FLOAT); // 6 - Offset Y
            map(Type.FLOAT); // 7 - Offset Z
            map(Type.FLOAT); // 8 - Particle Data
            map(Type.INT); // 9 - Particle Count

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int id = wrapper.get(Type.INT, 0);
                    if (id == 27) {
                        wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
                    }
                }
            });
        }
    });
}
 

public static void register(Protocol protocol) {
    BlockRewriter blockRewriter = new BlockRewriter(protocol, Type.POSITION, Protocol1_13To1_13_1::getNewBlockStateId, Protocol1_13To1_13_1::getNewBlockId);

    protocol.registerOutgoing(ClientboundPackets1_13.CHUNK_DATA, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
                    Chunk chunk = wrapper.passthrough(new Chunk1_13Type(clientWorld));

                    for (ChunkSection section : chunk.getSections()) {
                        if (section != null) {
                            for (int i = 0; i < section.getPaletteSize(); i++) {
                                section.setPaletteEntry(i, Protocol1_13To1_13_1.getNewBlockStateId(section.getPaletteEntry(i)));
                            }
                        }
                    }
                }
            });
        }
    });

    blockRewriter.registerBlockAction(ClientboundPackets1_13.BLOCK_ACTION);
    blockRewriter.registerBlockChange(ClientboundPackets1_13.BLOCK_CHANGE);
    blockRewriter.registerMultiBlockChange(ClientboundPackets1_13.MULTI_BLOCK_CHANGE);
    blockRewriter.registerEffect(ClientboundPackets1_13.EFFECT, 1010, 2001, InventoryPackets1_13_1::getOldItemId);
    blockRewriter.registerSpawnParticle(ClientboundPackets1_13.SPAWN_PARTICLE, 3, 20, 27, InventoryPackets1_13_1::toClient, Type.FLAT_ITEM, Type.FLOAT);
}
 

protected PacketHandler getTrackerAndMetaHandler(Type<List<Metadata>> metaType, EntityType entityType) {
    return wrapper -> {
        addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), entityType);

        List<Metadata> metaDataList = handleMeta(wrapper.user(), wrapper.get(Type.VAR_INT, 0),
                new MetaStorage(wrapper.get(metaType, 0))).getMetaDataList();
        wrapper.set(metaType, 0, metaDataList);
    };
}
 

protected PacketHandler getDimensionHandler(int index) {
    return wrapper -> {
        ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
        int dimensionId = wrapper.get(Type.INT, index);
        clientWorld.setEnvironment(dimensionId);
    };
}
 

public PacketHandler itemToClientHandler(Type<Item> type) {
    return wrapper -> toClient.rewrite(wrapper.get(type, 0));
}
 

public PacketHandler itemToServerHandler(Type<Item> type) {
    return wrapper -> toServer.rewrite(wrapper.get(type, 0));
}
 

public PacketHandler getTracker() {
    return getTrackerAndRewriter(null);
}
 

@Override
protected void registerPackets() {
    /* Incoming Packets */

    // Handshake Packet
    registerIncoming(State.HANDSHAKE, 0x00, 0x00, new PacketRemapper() {
        @Override
        public void registerMap() {
            // select right protocol
            map(Type.VAR_INT); // 0 - Client Protocol Version
            map(Type.STRING); // 1 - Server Address
            map(Type.UNSIGNED_SHORT); // 2 - Server Port
            map(Type.VAR_INT); // 3 - Next State
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int protVer = wrapper.get(Type.VAR_INT, 0);
                    int state = wrapper.get(Type.VAR_INT, 1);

                    ProtocolInfo info = wrapper.user().getProtocolInfo();
                    info.setProtocolVersion(protVer);
                    // Ensure the server has a version provider
                    if (Via.getManager().getProviders().get(VersionProvider.class) == null) {
                        wrapper.user().setActive(false);
                        return;
                    }
                    // Choose the pipe
                    int protocol = Via.getManager().getProviders().get(VersionProvider.class).getServerProtocol(wrapper.user());
                    info.setServerProtocolVersion(protocol);
                    List<Pair<Integer, Protocol>> protocols = null;

                    // Only allow newer clients or (1.9.2 on 1.9.4 server if the server supports it)
                    if (info.getProtocolVersion() >= protocol || Via.getPlatform().isOldClientsAllowed()) {
                        protocols = ProtocolRegistry.getProtocolPath(info.getProtocolVersion(), protocol);
                    }

                    ProtocolPipeline pipeline = wrapper.user().getProtocolInfo().getPipeline();
                    if (protocols != null) {
                        for (Pair<Integer, Protocol> prot : protocols) {
                            pipeline.add(prot.getValue());
                            // Ensure mapping data has already been loaded
                            ProtocolRegistry.completeMappingDataLoading(prot.getValue().getClass());
                        }
                        wrapper.set(Type.VAR_INT, 0, protocol);
                    }

                    // Add Base Protocol
                    pipeline.add(ProtocolRegistry.getBaseProtocol(protocol));

                    // Change state
                    if (state == 1) {
                        info.setState(State.STATUS);
                    }
                    if (state == 2) {
                        info.setState(State.LOGIN);
                    }
                }
            });
        }
    });
}
 

public static void register(Protocol1_13_1To1_13 protocol) {
    MetadataRewriter1_13_1To1_13 metadataRewriter = protocol.get(MetadataRewriter1_13_1To1_13.class);

    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_ENTITY, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity id
            map(Type.UUID); // 1 - UUID
            map(Type.BYTE); // 2 - Type
            map(Type.DOUBLE); // 3 - X
            map(Type.DOUBLE); // 4 - Y
            map(Type.DOUBLE); // 5 - Z
            map(Type.BYTE); // 6 - Pitch
            map(Type.BYTE); // 7 - Yaw
            map(Type.INT); // 8 - Data

            // Track Entity
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int entityId = wrapper.get(Type.VAR_INT, 0);
                    byte type = wrapper.get(Type.BYTE, 0);
                    Entity1_13Types.EntityType entType = Entity1_13Types.getTypeFromId(type, true);

                    if (entType != null) {
                        if (entType.is(Entity1_13Types.EntityType.FALLING_BLOCK)) {
                            int data = wrapper.get(Type.INT, 0);
                            wrapper.set(Type.INT, 0, Protocol1_13_1To1_13.getNewBlockStateId(data));
                        }
                        // Register Type ID
                        wrapper.user().get(EntityTracker1_13.class).addEntity(entityId, entType);
                    }
                }
            });
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity ID
            map(Type.UUID); // 1 - Entity UUID
            map(Type.VAR_INT); // 2 - Entity Type
            map(Type.DOUBLE); // 3 - X
            map(Type.DOUBLE); // 4 - Y
            map(Type.DOUBLE); // 5 - Z
            map(Type.BYTE); // 6 - Yaw
            map(Type.BYTE); // 7 - Pitch
            map(Type.BYTE); // 8 - Head Pitch
            map(Type.SHORT); // 9 - Velocity X
            map(Type.SHORT); // 10 - Velocity Y
            map(Type.SHORT); // 11 - Velocity Z
            map(Types1_13.METADATA_LIST); // 12 - Metadata

            handler(metadataRewriter.getTrackerAndRewriter(Types1_13.METADATA_LIST));
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity ID
            map(Type.UUID); // 1 - Player UUID
            map(Type.DOUBLE); // 2 - X
            map(Type.DOUBLE); // 3 - Y
            map(Type.DOUBLE); // 4 - Z
            map(Type.BYTE); // 5 - Yaw
            map(Type.BYTE); // 6 - Pitch
            map(Types1_13.METADATA_LIST); // 7 - Metadata

            handler(metadataRewriter.getTrackerAndRewriter(Types1_13.METADATA_LIST, Entity1_13Types.EntityType.PLAYER));
        }
    });

    metadataRewriter.registerEntityDestroy(ClientboundPackets1_13.DESTROY_ENTITIES);
    metadataRewriter.registerMetadataRewriter(ClientboundPackets1_13.ENTITY_METADATA, Types1_13.METADATA_LIST);
}
 

@Override
protected void registerPackets() {
    InventoryPackets.register(this);
    WorldPackets.register(this);
    EntityPackets.register(this);

    registerIncoming(ServerboundPackets1_13.EDIT_BOOK, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM);
        }
    });

    registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    wrapper.passthrough(Type.BOOLEAN); // Reset/clear
                    int size = wrapper.passthrough(Type.VAR_INT); // Mapping size

                    for (int i = 0; i < size; i++) {
                        wrapper.passthrough(Type.STRING); // Identifier

                        // Parent
                        if (wrapper.passthrough(Type.BOOLEAN))
                            wrapper.passthrough(Type.STRING);

                        // Display data
                        if (wrapper.passthrough(Type.BOOLEAN)) {
                            wrapper.passthrough(Type.COMPONENT); // Title
                            wrapper.passthrough(Type.COMPONENT); // Description
                            Item icon = wrapper.read(Type.FLAT_ITEM);
                            wrapper.write(Type.FLAT_VAR_INT_ITEM, icon);
                            wrapper.passthrough(Type.VAR_INT); // Frame type
                            int flags = wrapper.passthrough(Type.INT); // Flags
                            if ((flags & 1) != 0)
                                wrapper.passthrough(Type.STRING); // Background texture
                            wrapper.passthrough(Type.FLOAT); // X
                            wrapper.passthrough(Type.FLOAT); // Y
                        }

                        wrapper.passthrough(Type.STRING_ARRAY); // Criteria

                        int arrayLength = wrapper.passthrough(Type.VAR_INT);
                        for (int array = 0; array < arrayLength; array++) {
                            wrapper.passthrough(Type.STRING_ARRAY); // String array
                        }
                    }
                }
            });
        }
    });
}
 

public static void register(Protocol protocol) {
    final PacketHandler metaTypeHandler = wrapper -> {
        for (Metadata metadata : wrapper.get(Types1_13_2.METADATA_LIST, 0)) {
            metadata.setMetaType(MetaType1_13_2.byId(metadata.getMetaType().getTypeID()));
        }
    };

    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity ID
            map(Type.UUID); // 1 - Entity UUID
            map(Type.VAR_INT); // 2 - Entity Type
            map(Type.DOUBLE); // 3 - X
            map(Type.DOUBLE); // 4 - Y
            map(Type.DOUBLE); // 5 - Z
            map(Type.BYTE); // 6 - Yaw
            map(Type.BYTE); // 7 - Pitch
            map(Type.BYTE); // 8 - Head Pitch
            map(Type.SHORT); // 9 - Velocity X
            map(Type.SHORT); // 10 - Velocity Y
            map(Type.SHORT); // 11 - Velocity Z
            map(Types1_13.METADATA_LIST, Types1_13_2.METADATA_LIST); // 12 - Metadata

            handler(metaTypeHandler);
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity ID
            map(Type.UUID); // 1 - Player UUID
            map(Type.DOUBLE); // 2 - X
            map(Type.DOUBLE); // 3 - Y
            map(Type.DOUBLE); // 4 - Z
            map(Type.BYTE); // 5 - Yaw
            map(Type.BYTE); // 6 - Pitch
            map(Types1_13.METADATA_LIST, Types1_13_2.METADATA_LIST); // 7 - Metadata

            handler(metaTypeHandler);
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_METADATA, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Entity ID
            map(Types1_13.METADATA_LIST, Types1_13_2.METADATA_LIST); // 1 - Metadata list

            handler(metaTypeHandler);
        }
    });
}
 

public static void register(Protocol1_11To1_10 protocol) {
    ItemRewriter itemRewriter = new ItemRewriter(protocol, EntityIdRewriter::toClientItem, EntityIdRewriter::toServerItem);

    itemRewriter.registerSetSlot(ClientboundPackets1_9_3.SET_SLOT, Type.ITEM);
    itemRewriter.registerWindowItems(ClientboundPackets1_9_3.WINDOW_ITEMS, Type.ITEM_ARRAY);
    itemRewriter.registerEntityEquipment(ClientboundPackets1_9_3.ENTITY_EQUIPMENT, Type.ITEM);

    // Plugin message Packet -> Trading
    protocol.registerOutgoing(ClientboundPackets1_9_3.PLUGIN_MESSAGE, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.STRING); // 0 - Channel

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
                        wrapper.passthrough(Type.INT); // Passthrough Window ID

                        int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                        for (int i = 0; i < size; i++) {
                            EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM)); // Input Item
                            EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM)); // Output Item

                            boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
                            if (secondItem)
                                EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM)); // Second Item

                            wrapper.passthrough(Type.BOOLEAN); // Trade disabled
                            wrapper.passthrough(Type.INT); // Number of tools uses
                            wrapper.passthrough(Type.INT); // Maximum number of trade uses
                        }
                    }
                }
            });
        }
    });

    itemRewriter.registerClickWindow(ServerboundPackets1_9_3.CLICK_WINDOW, Type.ITEM);
    itemRewriter.registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION, Type.ITEM);
}
 

@Override
protected void registerPackets() {
    protocol.registerOutgoing(ClientboundPackets1_12.NAMED_SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.STRING); // 0 - Sound name
            map(Type.VAR_INT); // 1 - Sound Category
            map(Type.INT); // 2 - x
            map(Type.INT); // 3 - y
            map(Type.INT); // 4 - z
            map(Type.FLOAT); // 5 - Volume
            map(Type.FLOAT); // 6 - Pitch
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_12.SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Sound name
            map(Type.VAR_INT); // 1 - Sound Category
            map(Type.INT); // 2 - x
            map(Type.INT); // 3 - y
            map(Type.INT); // 4 - z
            map(Type.FLOAT); // 5 - Volume
            map(Type.FLOAT); // 6 - Pitch

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int oldId = wrapper.get(Type.VAR_INT, 0);
                    int newId = handleSounds(oldId);
                    if (newId == -1) {
                        wrapper.cancel();
                        return;
                    }

                    if (hasPitch(oldId)) {
                        wrapper.set(Type.FLOAT, 1, handlePitch(oldId));
                    }
                    wrapper.set(Type.VAR_INT, 0, newId);
                }
            });
        }
    });
}
 

@Override
protected void registerPackets() {
    InventoryPackets1_13_2.register(this);
    WorldPackets1_13_2.register(this);
    EntityPackets1_13_2.register(this);

    registerIncoming(ServerboundPackets1_13.EDIT_BOOK, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM);
        }
    });

    registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    wrapper.passthrough(Type.BOOLEAN); // Reset/clear
                    int size = wrapper.passthrough(Type.VAR_INT); // Mapping size

                    for (int i = 0; i < size; i++) {
                        wrapper.passthrough(Type.STRING); // Identifier

                        // Parent
                        if (wrapper.passthrough(Type.BOOLEAN))
                            wrapper.passthrough(Type.STRING);

                        // Display data
                        if (wrapper.passthrough(Type.BOOLEAN)) {
                            wrapper.passthrough(Type.COMPONENT); // Title
                            wrapper.passthrough(Type.COMPONENT); // Description
                            Item icon = wrapper.read(Type.FLAT_VAR_INT_ITEM);
                            wrapper.write(Type.FLAT_ITEM, icon);
                            wrapper.passthrough(Type.VAR_INT); // Frame type
                            int flags = wrapper.passthrough(Type.INT); // Flags
                            if ((flags & 1) != 0)
                                wrapper.passthrough(Type.STRING); // Background texture
                            wrapper.passthrough(Type.FLOAT); // X
                            wrapper.passthrough(Type.FLOAT); // Y
                        }

                        wrapper.passthrough(Type.STRING_ARRAY); // Criteria

                        int arrayLength = wrapper.passthrough(Type.VAR_INT);
                        for (int array = 0; array < arrayLength; array++) {
                            wrapper.passthrough(Type.STRING_ARRAY); // String array
                        }
                    }
                }
            });
        }
    });
}
 

public static void register(Protocol protocol) {
    ItemRewriter itemRewriter = new ItemRewriter(protocol, InventoryPackets1_13_1::toClient, InventoryPackets1_13_1::toServer);

    itemRewriter.registerSetCooldown(ClientboundPackets1_13.COOLDOWN, InventoryPackets1_13_1::getOldItemId);
    itemRewriter.registerWindowItems(ClientboundPackets1_13.WINDOW_ITEMS, Type.FLAT_ITEM_ARRAY);
    itemRewriter.registerSetSlot(ClientboundPackets1_13.SET_SLOT, Type.FLAT_ITEM);

    protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
        @Override
        public void registerMap() {
            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    String channel = wrapper.passthrough(Type.STRING);
                    if (channel.equals("minecraft:trader_list")) {
                        wrapper.passthrough(Type.INT); //Passthrough Window ID

                        int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                        for (int i = 0; i < size; i++) {
                            //Input Item
                            Item input = wrapper.passthrough(Type.FLAT_ITEM);
                            toClient(input);
                            //Output Item
                            Item output = wrapper.passthrough(Type.FLAT_ITEM);
                            toClient(output);

                            boolean secondItem = wrapper.passthrough(Type.BOOLEAN); //Has second item
                            if (secondItem) {
                                //Second Item
                                Item second = wrapper.passthrough(Type.FLAT_ITEM);
                                toClient(second);
                            }

                            wrapper.passthrough(Type.BOOLEAN); //Trade disabled
                            wrapper.passthrough(Type.INT); //Number of tools uses
                            wrapper.passthrough(Type.INT); //Maximum number of trade uses
                        }
                    }
                }
            });
        }
    });

    itemRewriter.registerEntityEquipment(ClientboundPackets1_13.ENTITY_EQUIPMENT, Type.FLAT_ITEM);
    itemRewriter.registerClickWindow(ServerboundPackets1_13.CLICK_WINDOW, Type.FLAT_ITEM);
    itemRewriter.registerCreativeInvAction(ServerboundPackets1_13.CREATIVE_INVENTORY_ACTION, Type.FLAT_ITEM);
}
 

@Override
protected void registerPackets() {
    protocol.registerOutgoing(ClientboundPackets1_9_3.NAMED_SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.STRING); // 0 - Sound name
            map(Type.VAR_INT); // 1 - Sound Category
            map(Type.INT); // 2 - x
            map(Type.INT); // 3 - y
            map(Type.INT); // 4 - z
            map(Type.FLOAT); // 5 - Volume
            map(Type.FLOAT, toOldPitch); // 6 - Pitch
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_9_3.SOUND, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Sound name
            map(Type.VAR_INT); // 1 - Sound Category
            map(Type.INT); // 2 - x
            map(Type.INT); // 3 - y
            map(Type.INT); // 4 - z
            map(Type.FLOAT); // 5 - Volume
            map(Type.FLOAT, toOldPitch); // 6 - Pitch

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int oldId = wrapper.get(Type.VAR_INT, 0);
                    int newId = handleSounds(oldId);
                    if (newId == -1) {
                        wrapper.cancel();
                        return;
                    }

                    if (hasPitch(oldId)) {
                        wrapper.set(Type.UNSIGNED_BYTE, 0, (short) Math.round(handlePitch(oldId) * 63.5F));
                    }
                    wrapper.set(Type.VAR_INT, 0, newId);
                }
            });
        }
    });
}
 

@Override
protected void registerPackets() {
    ItemRewriter itemRewriter = new ItemRewriter(protocol, this::handleItemToClient, this::handleItemToServer);

    itemRewriter.registerSetSlot(ClientboundPackets1_9_3.SET_SLOT, Type.ITEM);
    itemRewriter.registerWindowItems(ClientboundPackets1_9_3.WINDOW_ITEMS, Type.ITEM_ARRAY);
    itemRewriter.registerEntityEquipment(ClientboundPackets1_9_3.ENTITY_EQUIPMENT, Type.ITEM);

    // Plugin message Packet -> Trading
    protocol.registerOutgoing(ClientboundPackets1_9_3.PLUGIN_MESSAGE, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.STRING); // 0 - Channel

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
                        wrapper.passthrough(Type.INT); // Passthrough Window ID

                        int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                        for (int i = 0; i < size; i++) {
                            wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Input Item
                            wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Output Item

                            boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
                            if (secondItem) {
                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Second Item
                            }

                            wrapper.passthrough(Type.BOOLEAN); // Trade disabled
                            wrapper.passthrough(Type.INT); // Number of tools uses
                            wrapper.passthrough(Type.INT); // Maximum number of trade uses
                        }
                    }
                }
            });
        }
    });

    itemRewriter.registerClickWindow(ServerboundPackets1_9_3.CLICK_WINDOW, Type.ITEM);
    itemRewriter.registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION, Type.ITEM);

    // Handle item metadata
    protocol.getEntityPackets().registerMetaHandler().handle(e -> {
        Metadata data = e.getData();

        if (data.getMetaType().getType().equals(Type.ITEM)) { // Is Item
            data.setValue(handleItemToClient((Item) data.getValue()));
        }

        return data;
    });
}
 

public void register(Protocol1_10To1_11 protocol) {
    protocol.registerOutgoing(ClientboundPackets1_9_3.TITLE, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Action

            handler(new PacketHandler() {
                @Override
                public void handle(PacketWrapper wrapper) throws Exception {
                    int action = wrapper.get(Type.VAR_INT, 0);

                    // Handle the new ActionBar
                    if (action == 2) {
                        // Convert to the old actionbar way
                        PacketWrapper actionbar = new PacketWrapper(0x0F, null, wrapper.user()); // Chat Message packet
                        JsonElement msg = wrapper.read(Type.COMPONENT);
                        actionbar.write(Type.COMPONENT, msg);
                        actionbar.write(Type.BYTE, (byte) 2); // Above hotbar

                        actionbar.send(Protocol1_10To1_11.class);

                        wrapper.cancel(); // Cancel the title packet
                        return;
                    }

                    if (action > 2) {
                        wrapper.set(Type.VAR_INT, 0, action - 1); // Move everything one position down
                    }
                }
            });
        }
    });

    protocol.registerOutgoing(ClientboundPackets1_9_3.COLLECT_ITEM, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.VAR_INT); // 0 - Collected entity id
            map(Type.VAR_INT); // 1 - Collector entity id

            handler(wrapper -> wrapper.read(Type.VAR_INT)); // Ignore item pickup count
        }
    });


    protocol.registerIncoming(ServerboundPackets1_9_3.PLAYER_BLOCK_PLACEMENT, new PacketRemapper() {
        @Override
        public void registerMap() {
            map(Type.POSITION); // 0 - Location
            map(Type.VAR_INT); // 1 - Face
            map(Type.VAR_INT); // 2 - Hand

            map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
            map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
            map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
        }
    });
}