Geyser/connector/src/main/java/org/geysermc/connector/network/translators/java/world/JavaNotifyClientTranslator.java

/*
 * Copyright (c) 2019-2020 GeyserMC. http://geysermc.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @author GeyserMC
 * @link https://github.com/GeyserMC/Geyser
 */

package org.geysermc.connector.network.translators.java.world;

import com.github.steveice10.mc.protocol.data.game.ClientRequest;
import com.github.steveice10.mc.protocol.data.game.entity.player.GameMode;
import com.github.steveice10.mc.protocol.data.game.world.notify.EnterCreditsValue;
import com.github.steveice10.mc.protocol.packet.ingame.client.ClientRequestPacket;
import com.github.steveice10.mc.protocol.packet.ingame.server.world.ServerNotifyClientPacket;
import com.nukkitx.math.vector.Vector3f;
import com.nukkitx.protocol.bedrock.data.EntityDataDictionary;
import com.nukkitx.protocol.bedrock.data.EntityFlag;
import com.nukkitx.protocol.bedrock.packet.*;
import org.geysermc.connector.entity.Entity;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.PacketTranslator;

import java.util.concurrent.ThreadLocalRandom;

public class JavaNotifyClientTranslator extends PacketTranslator<ServerNotifyClientPacket> {

    @Override
    public void translate(ServerNotifyClientPacket packet, GeyserSession session) {
        Entity entity = session.getPlayerEntity();
        if (entity == null)
            return;

        switch (packet.getNotification()) {
            case START_RAIN:
                LevelEventPacket startRainPacket = new LevelEventPacket();
                startRainPacket.setEvent(LevelEventPacket.Event.START_RAIN);
                startRainPacket.setData(ThreadLocalRandom.current().nextInt(50000) + 10000);
                startRainPacket.setPosition(Vector3f.ZERO);
                session.getUpstream().sendPacket(startRainPacket);
                break;
            case STOP_RAIN:
                LevelEventPacket stopRainPacket = new LevelEventPacket();
                stopRainPacket.setEvent(LevelEventPacket.Event.STOP_RAIN);
                stopRainPacket.setData(ThreadLocalRandom.current().nextInt(50000) + 10000);
                stopRainPacket.setPosition(Vector3f.ZERO);
                session.getUpstream().sendPacket(stopRainPacket);
                break;
            case CHANGE_GAMEMODE:
                int playerFlags = 0;

                GameMode gameMode = (GameMode) packet.getValue();
                playerFlags = setPlayerFlag(0x01, gameMode == GameMode.ADVENTURE, playerFlags); // world immutable
                playerFlags = setPlayerFlag(0x20, true, playerFlags); // auto jump
                playerFlags = setPlayerFlag(0x40, gameMode == GameMode.CREATIVE || gameMode == GameMode.SPECTATOR, playerFlags); // can fly
                playerFlags = setPlayerFlag(0x80, gameMode == GameMode.SPECTATOR, playerFlags); // no clip
                playerFlags = setPlayerFlag(0x200, gameMode == GameMode.SPECTATOR, playerFlags); // is flying

                SetPlayerGameTypePacket playerGameTypePacket = new SetPlayerGameTypePacket();
                playerGameTypePacket.setGamemode(gameMode.ordinal());
                session.getUpstream().sendPacket(playerGameTypePacket);
                session.setGameMode(gameMode);

                AdventureSettingsPacket adventureSettingsPacket = new AdventureSettingsPacket();
                adventureSettingsPacket.setPlayerPermission(1);
                adventureSettingsPacket.setUniqueEntityId(entity.getGeyserId());
                adventureSettingsPacket.setPlayerFlags(playerFlags);
                session.getUpstream().sendPacket(adventureSettingsPacket);

                EntityDataDictionary metadata = entity.getMetadata();
                metadata.getFlags().setFlag(EntityFlag.CAN_FLY, gameMode == GameMode.CREATIVE || gameMode == GameMode.SPECTATOR);

                SetEntityDataPacket entityDataPacket = new SetEntityDataPacket();
                entityDataPacket.setRuntimeEntityId(entity.getGeyserId());
                entityDataPacket.getMetadata().putAll(metadata);
                session.getUpstream().sendPacket(entityDataPacket);
                break;
            case ENTER_CREDITS:
                switch ((EnterCreditsValue) packet.getValue()) {
                    case SEEN_BEFORE:
                        ClientRequestPacket javaRespawnPacket = new ClientRequestPacket(ClientRequest.RESPAWN);
                        session.getDownstream().getSession().send(javaRespawnPacket);
                        break;
                    case FIRST_TIME:
                        ShowCreditsPacket showCreditsPacket = new ShowCreditsPacket();
                        showCreditsPacket.setStatus(ShowCreditsPacket.Status.START_CREDITS);
                        showCreditsPacket.setRuntimeEntityId(entity.getGeyserId());
                        session.getUpstream().sendPacket(showCreditsPacket);
                        break;
                }
                break;
            default:
                break;
        }
    }

    private int setPlayerFlag(int flag, boolean value, int playerFlags) {
        if (value) {
            return playerFlags | flag;
        } else {
            return playerFlags & ~flag;
        }
    }
}