001/*
002 * Trident - A Multithreaded Server Alternative
003 * Copyright 2014 The TridentSDK Team
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *    http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package net.tridentsdk.server.packets.play.in;
019
020import io.netty.buffer.ByteBuf;
021import net.tridentsdk.server.netty.ClientConnection;
022import net.tridentsdk.server.netty.Codec;
023import net.tridentsdk.server.netty.packet.InPacket;
024import net.tridentsdk.server.netty.packet.Packet;
025import net.tridentsdk.server.player.PlayerConnection;
026
027/**
028 * Sent by the packet to keep the connection alive
029 */
030public class PacketPlayInKeepAlive extends InPacket {
031
032    /**
033     * Id of the keep alive packet, sent by the server
034     */
035    protected int keepAliveId;
036
037    @Override
038    public int id() {
039        return 0x0B;
040    }
041
042    @Override
043    public Packet decode(ByteBuf buf) {
044        this.keepAliveId = Codec.readVarInt32(buf);
045
046        return this;
047    }
048
049    @Override
050    public void handleReceived(ClientConnection connection) {
051        PlayerConnection pc = (PlayerConnection) connection;
052
053        if (!pc.hasSentKeepAlive())
054            return;
055
056        pc.handleKeepAlive(this);
057    }
058}