Helper.h

#ifndef HELPER_H
#define HELPER_H

#include <ctime>
#include <string>
#include <sstream>
#include <fstream>

namespace Helper
{
template <class T>
std::string ToString(const T &);

struct DateTime
{
    DateTime()
    {
        time_t ms;
        time(&ms);

        struct tm *info = localtime(&ms);
        D = info->tm_mday;
        m = info->tm_mon + 1;   // because it starts from 0 e.g. January = 0
        Y = 1900 + info->tm_year;
        M = info->tm_min;
        H = info->tm_hour;
        S = info->tm_sec;
    }

    DateTime(int D, int m, int Y, int H, int M, int S) : D(D), m(m), Y(Y), H(H), M(M), S(S) {}
    DateTime(int D, int m, int Y) : D(D), m(m), Y(Y), H(0), M(0), S(0) {}

    DateTime Now() const
    {
        return DateTime();
    }

    int D, m, Y, H, M, S;

    std::string GetDateString() const
    {
        return std::string(D < 10 ? "0": "") + ToString(D) + std::string(m < 10? ".0": ".") + ToString(m) + ToString(Y);
    }

    std::string GetTimeString(const std::string &sep = ":")
    {
        return std::string(H < 10? "0": "") + ToString(H) + sep + std::string(M < 10? "0": "") + ToString(M) + sep + std::string(S < 10? sep: "") + ToString(S);
    }

    std::string GetDateTimeString(const std::string &sep = ":")
    {
        return GetDateString() + " " + GetTimeString(sep);
    }
};

    template <class T>
    std::string ToString(const T &e)
    {
        std::ostringstream s;
        s << e;
        return s.str();
    }

    void WriteAppLog (const std::string &s)
    {
        std::ofstream file("AppLog.txt", std::ios::app);
        file << "[" << Helper::DateTime().GetDateTimeString() << "]" << "\n" << s << std::endl << "\n";
        file.close();
    }
}
#endif // HELPER_H