//
// Created by dongl on 23-6-20.
//

#include "IMDataPacket.h"

IMDataPacket::IMDataPacket(mp::MP_TYPE type, mp::im::msg_data* data) :
        Mph(type),
        MsgData(data) {

}

IMDataPacket::IMDataPacket(mp::MP_TYPE type, mp::MP_SUB_TYPE subType,
        mp::MP_SUB_TYPE sessionType, uint64_t messageId,
        time_t time, uint64_t account, std::string &imMsgData) :
        Mph(type),
        MsgData(subType, sessionType,messageId, time, account,imMsgData) {

}

IMDataPacket::IMDataPacket(mp::MP_TYPE type, mp::MP_SUB_TYPE subType,
                           uint64_t messageId, time_t time) :
        Mph(type),
        MsgData(subType, messageId, time) {

}

std::string IMDataPacket::packet() {
    // 包体长度
    mph->set_mpb_size(data->ByteSizeLong());

    // im_data_packet 的 L 为 16bit
    std::string temp;

    // 判断是否超过数据包限制大小  一个包 大概0.06MB
    if (mph->ByteSizeLong() + data->ByteSizeLong() > 65535) {
        return "超过数据包限制大小，无法构造，长度请低于65535， 或者分包";
    }

    // L
//    temp.push_back(mph->ByteSizeLong());
    if (mph->ByteSizeLong() + data->ByteSizeLong() <= 255) {
        temp.push_back(0);
        temp.push_back(mph->ByteSizeLong());
    } else {
        short len = mph->ByteSizeLong() + data->ByteSizeLong();
        char LTV_L[2];
        memcpy(LTV_L, &len, sizeof(LTV_L));
        temp.append(LTV_L);
    }

    // T
    mph->AppendToString(&temp);
    // V
    data->AppendToString(&temp);

    return temp;
}