include/crow_g3_logger.hpp

#pragma once

// This file overrides the default crow logging framework to use g3 instead.
// It implements enough of the interfaces of the crow logging framework to work correctly
// but deletes the ILogHandler interface, as usage of that would be counter to the g3
// handler management, and would cause performance issues.


#include <string>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>

#include <g3log/g3log.hpp>
#include <g3log/logworker.hpp>

namespace crow
{
    enum class LogLevel
    {
#ifndef ERROR
        DEBUG = 0,
        INFO,
        WARNING,
        ERROR,
        CRITICAL,
#endif

        Debug = 0,
        Info,
        Warning,
        Error,
        Critical,
    };

    class logger {

        public:


            logger(std::string prefix, LogLevel level) : level_(level) {
                // no op, let g3 handle th log levels

            }

            //
            template <typename T>
            logger& operator<<(T const &value) {

    #ifdef CROW_ENABLE_LOGGING
                if(level_ >= get_current_log_level()) {
                    stringstream_ << value;
                }
    #endif
                return *this;
            }

            //
            static void setLogLevel(LogLevel level) {
                get_log_level_ref() = level;
            }

            static LogLevel get_current_log_level() {
                return get_log_level_ref();
            }

        private:
            //
            static LogLevel& get_log_level_ref()
            {
                static LogLevel current_level = (LogLevel)CROW_LOG_LEVEL;
                return current_level;
            }

            //
            std::ostringstream stringstream_;
            LogLevel level_;
    };
}

#define CROW_LOG_CRITICAL   \
        LOG(FATAL)
#define CROW_LOG_ERROR      \
        LOG(WARNING)
#define CROW_LOG_WARNING    \
        LOG(WARNING)
#define CROW_LOG_INFO       \
        LOG(INFO)
#define CROW_LOG_DEBUG      \
        LOG(DEBUG)