com.vethrfolnir.network.WritePacket.java Source code

Introduction

Here is the source code for com.vethrfolnir.network.WritePacket.java

Source

/**
 * Copyright (C) 2013-2014 Project-Vethrfolnir
 *
 * 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.vethrfolnir.network;

import io.netty.buffer.ByteBuf;

import com.vethrfolnir.logging.MuLogger;

import corvus.corax.Corax;
import corvus.corax.util.Tools;

/**
 * @author Vlad
 * All packets should be managed as static instances!
 */
public abstract class WritePacket {

    protected static final MuLogger log = MuLogger.getLogger(WritePacket.class);

    public abstract void write(NetworkClient context, ByteBuf buff, Object... params);

    public WritePacket() {
        Corax.process(this);
    }

    public void writeC(ByteBuf buff, int value) {
        buff.writeByte(value);
    }

    public void writeD(ByteBuf buff, int value) {
        buff.writeInt(value);
    }

    public void writeSh(ByteBuf buff, int value) {
        buff.writeShort(value);
    }

    public void writeArray(ByteBuf buff, int... vals) {
        for (int i = 0; i < vals.length; i++) {
            buff.writeByte(vals[i]);
        }
    }

    public void writeArray(ByteBuf buff, byte... vals) {
        for (int i = 0; i < vals.length; i++) {
            buff.writeByte(vals[i]);
        }
    }

    public void writeArray(ByteBuf buff, int fills, byte... vals) {
        for (int i = 0; i < vals.length; i++) {
            buff.writeByte(vals[i]);
        }

        for (int i = vals.length; i < fills; i++)
            buff.writeByte(0x00);
    }

    /**
     * This is only for LS <-> GS Communication, do not use it for clients!
     * @param buff
     * @param value
     */
    public void writeS(ByteBuf buff, String value) {
        if (value == null)
            throw new RuntimeException("Value is null!");

        try {
            for (int i = 0; i < value.length(); i++) {
                buff.writeChar(value.charAt(i));
            }
            buff.writeChar('\000');
        } catch (Exception e) {
            log.warn("Failed writing string!", e);
        }
    }

    @SuppressWarnings("unchecked")
    public <T> T as(Object obj) {
        return (T) obj;
    }

    /**
     * This will also parse strings into the needed type
     * @param obj
     * @param type
     * @return
     */
    @SuppressWarnings("unchecked")
    public <T> T as(Object obj, Class<T> type) {
        if (type.isInstance(obj)) {
            return (T) obj;
        }

        if (obj instanceof String)
            return (T) Tools.parsePrimitiveTypes(type, String.valueOf(obj));

        return (T) obj;
    }

    public void markLength(ByteBuf buff) {
        int lenght = buff.writerIndex();
        switch (buff.getUnsignedByte(0)) {
        case 0xC1:
        case 0xC3:
            buff.setByte(1, lenght);
            break;
        case 0xC2:
        case 0xC4:
            buff.setByte(1, lenght >> 8);
            buff.setByte(2, lenght & 0xFF);
            break;
        }
    }

    public boolean isEncryptable(ByteBuf buff) {
        switch (buff.getUnsignedByte(0)) {
        case 0xC3:
        case 0xC4:
            return true;
        }

        return false;
    }

}