Sign Input

PlayerInput.java

public class PlayerInput {
    private static final HashMap<UUID, Consumer<?>> callbackMap = new HashMap<>();
	
    private static final Set<Class<?>> ignoredClasses = Sets.newHashSet(
        ClientAnimationPacket.class,
        ClientPongPacket.class,
        ClientPlayerPositionPacket.class,
        ClientPlayerRotationPacket.class,
        ClientPlayerPositionAndRotationPacket.class,
        ClientKeepAlivePacket.class
    );
	
    public static void doSignInput(Player player, Consumer<String> consumer) {
        doSignInput(player, "Enter Value", consumer);
    }
	
    public static void doSignInput(Player player, String prompt, Consumer<String> consumer) {
        UUID uuid = player.getUuid();
		
        if(callbackMap.containsKey(uuid)) {
            callbackMap.get(uuid).accept(null);
            callbackMap.remove(uuid);
        }
        callbackMap.put(uuid, consumer);
		
        final Point signPosition = new Vec(player.getPosition().blockX(), 0, player.getPosition().blockZ());
		
        BlockChangePacket packet = new BlockChangePacket();
        packet.blockPosition = signPosition;
        packet.blockStateId = Block.OAK_SIGN.stateId();
        player.getPlayerConnection().sendPacket(packet);
		
        NBTCompound nbt = new NBTCompound();
        nbt.setString("Text1", GsonComponentSerializer.gson().serialize(Component.empty()));
        nbt.setString("Text2", GsonComponentSerializer.gson().serialize(Component.empty()));
        nbt.setString("Text3", GsonComponentSerializer.gson().serialize(Component.text("^^^^^^^^^^^")));
        nbt.setString("Text4", GsonComponentSerializer.gson().serialize(Component.text(prompt)));
		
        BlockEntityDataPacket packet2 = new BlockEntityDataPacket();
        packet2.blockPosition = signPosition;
        packet2.action = 9; //Sign
        packet2.nbtCompound = nbt;
        player.getPlayerConnection().sendPacket(packet2);
		
        OpenSignEditorPacket packet3 = new OpenSignEditorPacket();
        packet3.signPosition = signPosition;
        player.getPlayerConnection().sendPacket(packet3);
		
        String id = "RegionParamShortStr-"+player.getUuid();
		
        MinecraftServer.getGlobalEventHandler().removeChildren(id);
        EventNode<PlayerEvent> node = EventNode.type(id, EventFilter.PLAYER, (playerevent, p) -> player == p).setPriority(999);
        node.addListener(PlayerPacketEvent.class, (event) -> {
            if(event.getPacket() instanceof ClientUpdateSignPacket) {
                ClientUpdateSignPacket updateSign = (ClientUpdateSignPacket) event.getPacket();
				
                callbackMap.remove(uuid);
                MinecraftServer.getGlobalEventHandler().removeChildren(id);
                if(event.getPlayer().getInstance() != null) {
                    BlockChangePacket blockChangePacket = new BlockChangePacket();
                    blockChangePacket.blockPosition = signPosition;
                    blockChangePacket.blockStateId = event.getPlayer().getInstance().getBlock(signPosition).stateId();
                    player.getPlayerConnection().sendPacket(blockChangePacket);
                }
				
                consumer.accept(updateSign.line1 + updateSign.line2);
            } else if(!ignoredClasses.contains(event.getPacket().getClass())) {
                callbackMap.remove(uuid);
                MinecraftServer.getGlobalEventHandler().removeChildren(id);
                if(event.getPlayer().getInstance() != null) {
                    BlockChangePacket blockChangePacket = new BlockChangePacket();
                    blockChangePacket.blockPosition = signPosition;
                    blockChangePacket.blockStateId = event.getPlayer().getInstance().getBlock(signPosition).stateId();
                    player.getPlayerConnection().sendPacket(blockChangePacket);
                }
				
                consumer.accept(null);
            }
        });
		
        node.addListener(PlayerDisconnectEvent.class, (event) -> {
            MinecraftServer.getGlobalEventHandler().removeChildren(id);
        });
		
        MinecraftServer.getGlobalEventHandler().addChild(node);
    }
}