logging.hh

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#ifndef UTOPIA_CORE_LOGGING_HH
#define UTOPIA_CORE_LOGGING_HH
 
#include <string>
 
#include <spdlog/spdlog.h>
#include <spdlog/sinks/stdout_color_sinks.h>
 
#include "ostream.hh"
 
namespace Utopia {
 
inline const std::string log_core = "core";
inline const std::string log_data_io = "data_io";
inline const std::string log_data_mngr = "data_mngr";
 
 
inline std::shared_ptr<spdlog::logger> init_logger (
    const std::string name,
    const spdlog::level::level_enum level,
    const bool throw_on_exist = true
)
{
    auto logger = spdlog::get(name);
 
    // Create it if it does not exist yet; without a check, spdlog would throw
    if (not logger || throw_on_exist) {
        logger = spdlog::stdout_color_mt(name);
    }
 
    logger->set_level(level);
    return logger;
};
 
 
inline void setup_loggers (
    const spdlog::level::level_enum level_core = spdlog::level::warn,
    const spdlog::level::level_enum level_data_io = spdlog::level::warn,
    const spdlog::level::level_enum level_data_mngr = spdlog::level::warn,
    const std::string& log_pattern = ""
)
{
    // initialize
    init_logger(log_core, level_core, false);
    init_logger(log_data_io, level_data_io, false);
    init_logger(log_data_mngr, level_data_mngr, false);
    spdlog::flush_on(spdlog::level::err);
 
    // set global pattern to
    // "[HH:MM:SS.mmm] [level(colored)] [logger]  <message>"
    if (not log_pattern.empty()) {
        spdlog::set_pattern(log_pattern);
    }
    else {
        spdlog::set_pattern("[%T.%e] [%^%l%$] [%n]  %v");
    }
 
    spdlog::get("core")->info("Set up loggers: core, data_io, data_mngr.");
}
 
// end group logging
} // namespace Utopia
 
#endif // UTOPIA_CORE_LOGGING_HH