/*
 * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
 * Copyright (C) 2016-2021 ViaVersion and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.viaversion.viaversion.bukkit.handlers;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;
import com.viaversion.viaversion.api.data.UserConnection;

import java.util.List;

public class BukkitPacketHandler extends MessageToMessageEncoder {
    private final UserConnection info;

    public BukkitPacketHandler(UserConnection info) {
        this.info = info;
    }

    @Override
    protected void encode(ChannelHandlerContext ctx, Object o, List list) throws Exception {
        // Split chunks bulk packet up in to single chunks packets before it reached the encoder.
        // This will prevent issues with several plugins and other protocol handlers due to the chunks being sent twice.
        // It also sends the chunks in the right order possible resolving some issues with added chunks/block/entity data.
        if (!(o instanceof ByteBuf)) {
            info.getPacketTracker().setLastPacket(o);
            /* This transformer is more for fixing issues which we find hard at packet level :) */
            if (info.isActive()) {
                if (info.getProtocolInfo().getPipeline().filter(o, list)) {
                    return;
                }
            }
        }

        list.add(o);
    }
}
