NPCLib/nms/v1_9_R2/src/main/java/net/jitse/npclib/nms/v1_9_R2/NPC_v1_9_R2.java

/*
 * Copyright (c) 2018 Jitse Boonstra
 */

package net.jitse.npclib.nms.v1_9_R2;

import net.jitse.npclib.NPCLib;
import net.jitse.npclib.api.state.NPCSlot;
import net.jitse.npclib.hologram.Hologram;
import net.jitse.npclib.internal.MinecraftVersion;
import net.jitse.npclib.internal.NPCBase;
import net.jitse.npclib.nms.v1_9_R2.packets.*;
import net.minecraft.server.v1_9_R2.*;
import org.bukkit.Bukkit;
import org.bukkit.craftbukkit.v1_9_R2.entity.CraftPlayer;
import org.bukkit.craftbukkit.v1_9_R2.inventory.CraftItemStack;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

import java.util.List;

/**
 * @author Jitse Boonstra
 */
public class NPC_v1_9_R2 extends NPCBase {

    private PacketPlayOutNamedEntitySpawn packetPlayOutNamedEntitySpawn;
    private PacketPlayOutScoreboardTeam packetPlayOutScoreboardTeamRegister;
    private PacketPlayOutPlayerInfo packetPlayOutPlayerInfoAdd, packetPlayOutPlayerInfoRemove;
    private PacketPlayOutEntityHeadRotation packetPlayOutEntityHeadRotation;
    private PacketPlayOutEntityDestroy packetPlayOutEntityDestroy;

    public NPC_v1_9_R2(NPCLib instance, List<String> lines) {
        super(instance, lines);
    }

    @Override
    public void createPackets() {
        this.hologram = new Hologram(MinecraftVersion.V1_9_R2, location.clone().subtract(0, 0.5, 0), text);

        PacketPlayOutPlayerInfoWrapper packetPlayOutPlayerInfoWrapper = new PacketPlayOutPlayerInfoWrapper();

        // Packets for spawning the NPC:
        this.packetPlayOutScoreboardTeamRegister = new PacketPlayOutScoreboardTeamWrapper()
                .createRegisterTeam(name); // First packet to send.

        this.packetPlayOutPlayerInfoAdd = packetPlayOutPlayerInfoWrapper
                .create(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, gameProfile, name); // Second packet to send.

        this.packetPlayOutNamedEntitySpawn = new PacketPlayOutNamedEntitySpawnWrapper()
                .create(uuid, location, entityId); // Third packet to send.

        this.packetPlayOutEntityHeadRotation = new PacketPlayOutEntityHeadRotationWrapper()
                .create(location, entityId); // Fourth packet to send.

        this.packetPlayOutPlayerInfoRemove = packetPlayOutPlayerInfoWrapper
                .create(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.REMOVE_PLAYER, gameProfile, name); // Fifth packet to send (delayed).

        // Packet for destroying the NPC:
        this.packetPlayOutEntityDestroy = new PacketPlayOutEntityDestroy(entityId); // First packet to send.
    }

    @Override
    public void sendShowPackets(Player player) {
        PlayerConnection playerConnection = ((CraftPlayer) player).getHandle().playerConnection;

        if (hasTeamRegistered.add(player.getUniqueId()))
            playerConnection.sendPacket(packetPlayOutScoreboardTeamRegister);
        playerConnection.sendPacket(packetPlayOutPlayerInfoAdd);
        playerConnection.sendPacket(packetPlayOutNamedEntitySpawn);
        playerConnection.sendPacket(packetPlayOutEntityHeadRotation);

        hologram.show(player);

        // Removing the player info after 10 seconds.
        Bukkit.getScheduler().runTaskLater(instance.getPlugin(), () ->
                playerConnection.sendPacket(packetPlayOutPlayerInfoRemove), 200);
    }

    @Override
    public void sendHidePackets(Player player) {
        PlayerConnection playerConnection = ((CraftPlayer) player).getHandle().playerConnection;

        playerConnection.sendPacket(packetPlayOutEntityDestroy);
        playerConnection.sendPacket(packetPlayOutPlayerInfoRemove);

        hologram.hide(player);
    }

    @Override
    public void sendMetadataPacket(Player player) {
        PlayerConnection playerConnection = ((CraftPlayer) player).getHandle().playerConnection;
        PacketPlayOutEntityMetadata packet = new PacketPlayOutEntityMetadataWrapper().create(activeStates, entityId);

        playerConnection.sendPacket(packet);
    }

    @Override
    public void sendEquipmentPacket(Player player, NPCSlot slot, boolean auto) {
        PlayerConnection playerConnection = ((CraftPlayer) player).getHandle().playerConnection;

        EnumItemSlot nmsSlot = slot.getNmsEnum(EnumItemSlot.class);
        ItemStack item = getItem(slot);

        PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment(entityId, nmsSlot, CraftItemStack.asNMSCopy(item));
        playerConnection.sendPacket(packet);
    }
}