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#pragma once
#include <string>
#include <chrono>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>
#include "settings.h"
using namespace std;
namespace crow
{
enum class LogLevel
{
CRITICAL,
ERROR,
WARNING,
INFO,
DEBUG
};
class ILogHandler {
public:
virtual void log(string message, LogLevel level) = 0;
};
class CerrLogHandler : public ILogHandler {
public:
void log(string message, LogLevel level) override {
cerr << message;
}
};
class logger {
private:
//
static string timeStamp()
{
char date[32];
time_t t = time(0);
strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", gmtime(&t));
return string(date);
}
public:
//
static LogLevel currentLevel;
static std::shared_ptr<ILogHandler> currentHandler;
logger(string prefix, LogLevel level) : m_prefix(prefix), m_level(level) {
}
~logger() {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
ostringstream str;
str << "(" << timeStamp() << ") [" << m_prefix << "] " << m_stringStream.str() << endl;
currentHandler->log(str.str(), m_level);
}
#endif
}
//
template <typename T>
logger& operator<<(T const &value) {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
m_stringStream << value;
}
#endif
return *this;
}
//
static void setLogLevel(LogLevel level) {
currentLevel = level;
}
static void setHandler(std::shared_ptr<ILogHandler> handler) {
currentHandler = handler;
}
private:
//
ostringstream m_stringStream;
string m_prefix;
LogLevel m_level;
};
//
LogLevel logger::currentLevel = (LogLevel)CROW_LOG_LEVEL;
std::shared_ptr<ILogHandler> logger::currentHandler = std::make_shared<CerrLogHandler>();
}
#define CROW_LOG_CRITICAL crow::logger("CRITICAL", crow::LogLevel::CRITICAL)
#define CROW_LOG_ERROR crow::logger("ERROR ", crow::LogLevel::ERROR)
#define CROW_LOG_WARNING crow::logger("WARNING ", crow::LogLevel::WARNING)
#define CROW_LOG_INFO crow::logger("INFO ", crow::LogLevel::INFO)
#define CROW_LOG_DEBUG crow::logger("DEBUG ", crow::LogLevel::DEBUG)
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