Minestom/src/main/java/fr/themode/minestom/listener/BlockPlacementListener.java

package fr.themode.minestom.listener;

import fr.themode.minestom.entity.Player;
import fr.themode.minestom.event.BlockPlaceEvent;
import fr.themode.minestom.instance.Chunk;
import fr.themode.minestom.instance.Instance;
import fr.themode.minestom.net.packet.client.play.ClientPlayerBlockPlacementPacket;
import fr.themode.minestom.net.packet.client.play.ClientPlayerDiggingPacket;
import fr.themode.minestom.utils.BlockPosition;

public class BlockPlacementListener {

    public static void listener(ClientPlayerBlockPlacementPacket packet, Player player) {
        ClientPlayerDiggingPacket.BlockFace blockFace = packet.blockFace;
        BlockPosition blockPosition = packet.blockPosition;

        Instance instance = player.getInstance();
        if (instance == null)
            return;

        int offsetX = blockFace == ClientPlayerDiggingPacket.BlockFace.WEST ? -1 : blockFace == ClientPlayerDiggingPacket.BlockFace.EAST ? 1 : 0;
        int offsetY = blockFace == ClientPlayerDiggingPacket.BlockFace.BOTTOM ? -1 : blockFace == ClientPlayerDiggingPacket.BlockFace.TOP ? 1 : 0;
        int offsetZ = blockFace == ClientPlayerDiggingPacket.BlockFace.NORTH ? -1 : blockFace == ClientPlayerDiggingPacket.BlockFace.SOUTH ? 1 : 0;

        blockPosition.add(offsetX, offsetY, offsetZ);
        BlockPlaceEvent blockPlaceEvent = new BlockPlaceEvent((short) 10, blockPosition, packet.hand);
        player.callEvent(BlockPlaceEvent.class, blockPlaceEvent);
        if (!blockPlaceEvent.isCancelled()) {
            instance.setBlock(blockPosition, "custom_block");
            // TODO consume block in hand for survival players
        } else {
            Chunk chunk = instance.getChunkAt(blockPosition);
            instance.sendChunkUpdate(player, chunk);
        }
        player.getInventory().refreshSlot(player.getHeldSlot());
    }

}