simple logger

simple_logger.h

/********************************************************
 * usage:                                               *
 *      #include "log.h"                                *
 *      logger info(INFO);                              *
 *      logger err(ERROR);                              *
 *      logger debug(DEBUG);                            *
 *                                                      *
 *      info << std::string msg + "\n";                 *
 *      debug << std::string msg + "\n";                *
 *      err << std::string msg + "\n";                  *
 *                                                      *
 * license:                                             *
 *      GPLv3                                           *
 ********************************************************/



#ifndef LOG_H
#define LOG_H

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

#define LOGDIR "./logs/"

// make this longer for more levels
enum type {
    ERROR,
    DEBUG,
    INFO
};

class logger
{
    private:
        std::string dir;
        std::string path;
        std::ofstream file;
        int type;

    public:
        logger(int type)
        {
            dir = LOGDIR;
            // make this longer for more levels
            switch (type)
            {
                case 0 : path = dir + "error.log";
                         break;
                case 1 : path = dir + "debug.log";
                         break;
                case 2 : path = dir + "info.log";
                         break;
                default: return;
            }
            // append
            file.open(path.c_str(), std::ofstream::app);
        }

        ~logger()
        {
            file.close();
        }

        int operator<< (const std::string msg)
        {
            char mbstr[100];
            std::string message;
            std::time_t timer;

            // get current time
            timer = std::time(NULL);

            // leider _kein_ C++11
            // if(file.is_open())
            // file << std:put_time(std::localtime(&timer),"%TT%F) + message;

            if (std::strftime(mbstr, sizeof(mbstr), "%TT%F", std::localtime(&timer))
                && file.is_open())
                file << mbstr << " :\t" << msg << std::endl;

            return 0;
        }
};

#endif