Minions/oldSrc/io/github/skippyall/minions/fakeplayer/MinionFakePlayer.java

package io.github.skippyall.minions.fakeplayer;

import com.mojang.authlib.GameProfile;
import com.mojang.authlib.yggdrasil.ProfileResult;
import net.minecraft.core.BlockPos;
import net.minecraft.core.UUIDUtil;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.contents.TranslatableContents;
import net.minecraft.network.protocol.PacketFlow;
import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
import net.minecraft.network.protocol.game.ClientboundRotateHeadPacket;
import net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket;
import net.minecraft.network.protocol.game.ServerboundClientCommandPacket;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.TickTask;
import net.minecraft.server.level.ClientInformation;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.server.network.CommonListenerCookie;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EquipmentSlot;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.food.FoodData;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.GameType;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.phys.Vec3;

import java.util.UUID;

public class MinionFakePlayer extends ServerPlayer {
    public Runnable fixStartingPosition = () -> {};
    public boolean isAShadow;
    public static void createMinion(String username, ServerLevel level, ServerPlayer owner, Vec3 pos, double yaw, double pitch) {
        MinecraftServer server = level.getServer();
        server.getProfileCache().getAsync(username).thenAcceptAsync((optional) -> {
            GameProfile profile = null;
            if(optional.isPresent()){
                UUID uuid = optional.get().getId();
                ProfileResult result = server.getSessionService().fetchProfile(uuid, true);
                if(result != null) {
                    profile = result.profile();
                }
            }
            if(profile == null) {
                profile = new GameProfile(UUIDUtil.createOfflinePlayerUUID(username), username);
            }
            MinionFakePlayer instance = new MinionFakePlayer(server, level, profile, ClientInformation.createDefault(), false);
            instance.fixStartingPosition = () -> instance.moveTo(pos.x, pos.y, pos.z, (float) yaw, (float) pitch);
            server.getPlayerList().placeNewPlayer(new FakeClientConnection(PacketFlow.SERVERBOUND), instance, new CommonListenerCookie(profile, 0, instance.clientInformation()));
            instance.teleportTo(level, pos.x, pos.y, pos.z, (float) yaw, (float) pitch);
            instance.setHealth(20.0F);
            instance.unsetRemoved();
            instance.gameMode.changeGameModeForPlayer(GameType.SURVIVAL);
            server.getPlayerList().broadcastAll(new ClientboundRotateHeadPacket(instance, (byte) (instance.yHeadRot * 256 / 360)), level.dimension());//instance.dimension);
            server.getPlayerList().broadcastAll(new ClientboundTeleportEntityPacket(instance), level.dimension());//instance.dimension);
            //instance.world.getChunkManager(). updatePosition(instance);
            instance.entityData.set(DATA_PLAYER_MODE_CUSTOMISATION, (byte) 0x7f); // show all model layers (incl. capes)
            instance.getAbilities().flying = false;
            instance.setMaxUpStep(0.6F);
        });


    }

    @SuppressWarnings("unused") //Don't know if I'll need this
    public static MinionFakePlayer createShadow(MinecraftServer server, ServerPlayer player)
    {
        player.getServer().getPlayerList().remove(player);
        player.connection.disconnect(Component.translatable("multiplayer.disconnect.duplicate_login"));
        ServerLevel worldIn = player.serverLevel();//.getWorld(player.dimension);
        GameProfile gameprofile = player.getGameProfile();
        MinionFakePlayer playerShadow = new MinionFakePlayer(server, worldIn, gameprofile, player.clientInformation(), true);
        playerShadow.setChatSession(player.getChatSession());
        server.getPlayerList().placeNewPlayer(new FakeClientConnection(PacketFlow.SERVERBOUND), playerShadow, new CommonListenerCookie(gameprofile, 0, player.clientInformation()));

        playerShadow.setHealth(player.getHealth());
        playerShadow.connection.teleport(player.getX(), player.getY(), player.getZ(), player.getYRot(), player.getXRot());
        playerShadow.gameMode.changeGameModeForPlayer(player.gameMode.getGameModeForPlayer());
        ((ServerPlayerInterface) playerShadow).getActionPack().copyFrom(((ServerPlayerInterface) player).getActionPack());
        playerShadow.entityData.set(DATA_PLAYER_MODE_CUSTOMISATION, player.getEntityData().get(DATA_PLAYER_MODE_CUSTOMISATION));


        server.getPlayerList().broadcastAll(new ClientboundRotateHeadPacket(playerShadow, (byte) (player.yHeadRot * 256 / 360)), playerShadow.level().dimension());
        server.getPlayerList().broadcastAll(new ClientboundPlayerInfoUpdatePacket(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER, playerShadow));
        //player.world.getChunkManager().updatePosition(playerShadow);
        playerShadow.getAbilities().flying = player.getAbilities().flying;
        return playerShadow;
    }

    public static MinionFakePlayer respawnFake(MinecraftServer server, ServerLevel level, GameProfile profile, ClientInformation cli)
    {
        return new MinionFakePlayer(server, level, profile, cli, false);
    }

    private MinionFakePlayer(MinecraftServer server, ServerLevel worldIn, GameProfile profile, ClientInformation cli, boolean shadow)
    {
        super(server, worldIn, profile, cli);
        isAShadow = shadow;
    }

    @Override
    public void onEquipItem(final EquipmentSlot slot, final ItemStack previous, final ItemStack stack)
    {
        if (!isUsingItem()) super.onEquipItem(slot, previous, stack);
    }

    @Override
    public void kill()
    {
        kill(Component.literal("Killed"));
    }

    public void kill(Component reason)
    {
        shakeOff();

        if (reason.getContents() instanceof TranslatableContents text && text.getKey().equals("multiplayer.disconnect.duplicate_login")) {
            this.connection.onDisconnect(reason);
        } else {
            this.server.tell(new TickTask(this.server.getTickCount(), () -> {
                this.connection.onDisconnect(reason);
            }));
        }
    }

    @Override
    public void tick()
    {
        if (this.getServer().getTickCount() % 10 == 0)
        {
            this.connection.resetPosition();
            this.serverLevel().getChunkSource().move(this);
        }
        try
        {
            super.tick();
            this.doTick();
        }
        catch (NullPointerException ignored)
        {
            // happens with that paper port thingy - not sure what that would fix, but hey
            // the game not gonna crash violently.
        }


    }

    private void shakeOff()
    {
        if (getVehicle() instanceof Player) stopRiding();
        for (Entity passenger : getIndirectPassengers())
        {
            if (passenger instanceof Player) passenger.stopRiding();
        }
    }

    @Override
    public void die(DamageSource cause)
    {
        shakeOff();
        super.die(cause);
        setHealth(20);
        this.foodData = new FoodData();
        kill(this.getCombatTracker().getDeathMessage());
    }

    @Override
    public String getIpAddress()
    {
        return "127.0.0.1";
    }

    @Override
    public boolean allowsListing() {
        return false;
    }

    @Override
    protected void checkFallDamage(double y, boolean onGround, BlockState state, BlockPos pos) {
        doCheckFallDamage(0.0, y, 0.0, onGround);
    }

    @Override
    public Entity changeDimension(ServerLevel serverLevel)
    {
        super.changeDimension(serverLevel);
        if (wonGame) {
            ServerboundClientCommandPacket p = new ServerboundClientCommandPacket(ServerboundClientCommandPacket.Action.PERFORM_RESPAWN);
            connection.handleClientCommand(p);
        }

        // If above branch was taken, *this* has been removed and replaced, the new instance has been set
        // on 'our' connection (which is now theirs, but we still have a ref).
        if (connection.player.isChangingDimension()) {
            connection.player.hasChangedDimension();
        }
        return connection.player;
    }
}