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.out;
019
020import io.netty.buffer.ByteBuf;
021import net.tridentsdk.base.Substance;
022import net.tridentsdk.inventory.Item;
023import net.tridentsdk.server.data.Slot;
024import net.tridentsdk.server.netty.packet.OutPacket;
025
026public class PacketPlayOutWindowItems extends OutPacket {
027    private static final Slot EMPTY = new Slot(new Item(Substance.AIR) {
028        @Override
029        public int id() {
030            return -1;
031        }
032    });
033
034    protected int windowId;
035    protected Slot[] slots;
036
037    @Override
038    public int id() {
039        return 0x30;
040    }
041
042    public int windowId() {
043        return this.windowId;
044    }
045
046    public Slot[] slots() {
047        return this.slots;
048    }
049
050    @Override
051    public void encode(ByteBuf buf) {
052        buf.writeByte(this.windowId);
053        buf.writeShort(this.slots.length);
054
055        for (Slot s : this.slots) {
056            if (s == null) {
057                EMPTY.write(buf);
058                continue;
059            }
060            s.write(buf);
061        }
062    }
063}