core/utils/Logger.h

#ifndef CORE_LOGGER_H
#define CORE_LOGGER_H

#include "utils/ArrayString.h"

namespace Core::Logger {
    enum class Level { ERROR, WARNING, INFO, DEBUG };
    extern Level level;

    // aborts on critical logging failure
    template<typename... Args>
    void log(Level l, const char* file, int line, const char* start,
             const char* format, Args&&... args) {
        if(Core::Logger::level < l) {
            return;
        }
        file = Core::getFileName(file);
        Core::ArrayString<2048> s;
        Error e = Error::NONE;
        if(checkError(e, s.append(start)) ||
           checkError(e, s.append("#:# | ")) ||
           checkError(e, s.format(file, line)) ||
           checkError(e, s.append(format)) ||
           checkError(e, s.format(Core::forward<Args>(args)...)) ||
           checkError(e, s.append("\33[39;49m\n")) ||
           checkError(e, s.print())) {
            CORE_EXIT(1);
        }
    }
}

#if defined(CORE_LOG_LEVEL) && CORE_LOG_LEVEL >= 1
#define CORE_LOG_ERROR(format, ...)                                            \
    log(Core::Logger::Level::ERROR, __FILE__, __LINE__, "\33[1;31m[ERROR] ",   \
        format __VA_OPT__(, ) __VA_ARGS__);
#else
#define CORE_LOG_ERROR(format, ...)
#endif

#if defined(CORE_LOG_LEVEL) && CORE_LOG_LEVEL >= 2
#define CORE_LOG_WARNING(format, ...)                                          \
    log(Core::Logger::Level::WARNING, __FILE__, __LINE__,                      \
        "\33[1;33m[WARNING] ", format __VA_OPT__(, ) __VA_ARGS__);
#else
#define CORE_LOG_WARNING(format, ...)
#endif

#if defined(CORE_LOG_LEVEL) && CORE_LOG_LEVEL >= 3
#define CORE_LOG_INFO(format, ...)                                             \
    log(Core::Logger::Level::INFO, __FILE__, __LINE__, "\33[1;37m[INFO] ",     \
        format __VA_OPT__(, ) __VA_ARGS__);
#else
#define CORE_LOG_INFO(format, ...)
#endif

#if defined(CORE_LOG_LEVEL) && CORE_LOG_LEVEL >= 4
#define CORE_LOG_DEBUG(format, ...)                                            \
    log(Core::Logger::Level::DEBUG, __FILE__, __LINE__, "\33[1;32m[DEBUG] ",   \
        format __VA_OPT__(, ) __VA_ARGS__);
#else
#define CORE_LOG_DEBUG(format, ...)
#endif

#endif