package com.soft.QQ;

import java.io.IOException;
import static com.soft.QQ.Config.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2008</p>
 *
 * <p>Company: soft136</p>
 *
 * @author Michael
 * @version 1.0
 */
public class Helper {
        String time = (new MyDate()).getDate();

        /**
         * 封裝消息包
         * @param sender String
         * @param input String
         * @return byte[]
         * @throws IOException
         */
        public byte[] wrap(String sender, String input) throws IOException {
                BusinessOutHelper outHelper = new BusinessOutHelper(300);
                outHelper.writeString(sender, 50);
                outHelper.writeString(time, 22);
                outHelper.writeString("周春明", 10);
                outHelper.writeString(input, 150);
                outHelper.writeString(END_SYMBOL, 4);
                return outHelper.getBytes();
        }

        /**
         * 封裝在線列表用戶消息包
         * @param s String
         * @return byte[]
         * @throws IOException
         */
        public byte[] wrapOnlineUser(String s) throws IOException {
                BusinessOutHelper outHelper = new BusinessOutHelper(300);
                outHelper.writeString(s, 250);
                outHelper.writeString(END_SYMBOL, 4);
                return outHelper.getBytes();
        }
        /**
         * 封裝用戶登入信息包
         * @param sender String
         * @param IP String
         * @return byte[]
         * @throws IOException
         */
        public byte[] wrapUserInfo(String sender, String IP) throws IOException {
                BusinessOutHelper outHelper = new BusinessOutHelper(300);
                outHelper.writeString(sender, 50);
                outHelper.writeString(IP, 50);
                outHelper.writeString(END_SYMBOL, 4);
                return outHelper.getBytes();
        }

        /**
         * 解包過程
         * @param buf byte[]
         * @return ChatMessage
         * @throws IOException
         */
        public ChatMessage unwrap(byte[] buf) throws IOException {
                BusinessInHelper helper = new BusinessInHelper(buf);
                NetStruct ns = new NetStruct(helper.getInt(), helper.getInt(), helper
                                .getInt(), helper.getInt(), helper.getInt(), helper.getLong());
                if (ns.getProtocolId() != 1) {
                        // 非UDP包
                        return null;

                } else if (ns.getBusinessId() == 1) {
                        if (ns.getProtocolVersion() > 0) {
                                if (ns.getSoftVersion() > 0) {
                                        if (ns.getLength() > 0) {
                                                if (ns.getSerialId() == 0) {
                                                        return new ChatMessage(helper.getString(50), helper
                                                                        .getString(22), helper.getString(10),
                                                                        helper.getString(150));
                                                }
                                        }
                                }
                        }
                } else if (ns.getBusinessId() == 2) {
                        if (ns.getProtocolVersion() > 0) {
                                if (ns.getSoftVersion() > 0) {
                                        if (ns.getLength() > 0) {
                                                if (ns.getSerialId() == 0) {
                                                        return new ChatMessage(helper.getString(50), helper
                                                                        .getString(50));
                                                }
                                        }
                                }
                        }
                } else if (ns.getBusinessId() == 3) {
                        if (ns.getProtocolVersion() > 0) {
                                if (ns.getSoftVersion() > 0) {
                                        if (ns.getLength() > 0) {
                                                if (ns.getSerialId() == 0) {
                                                        return new ChatMessage(helper.getString(250));
                                                }
                                        }
                                }
                        }
                } else
                        return null;
                return null;
        }

}