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#pragma once
#include "Base.h"
#include "String.h"
#include "Format.h"
#include <list>
#include <memory>
namespace cru::log {
enum class LogLevel { Debug, Info, Warn, Error };
struct CRU_BASE_API ILogSource : virtual Interface {
// Write the string s. LogLevel is just a helper. It has no effect on the
// content to write.
virtual void Write(LogLevel level, StringView s) = 0;
};
class CRU_BASE_API Logger : public Object {
public:
static Logger* GetInstance();
public:
Logger() = default;
CRU_DELETE_COPY(Logger)
CRU_DELETE_MOVE(Logger)
~Logger() override = default;
public:
void AddSource(std::unique_ptr<ILogSource> source);
void RemoveSource(ILogSource* source);
public:
void Log(LogLevel level, StringView message);
void Log(LogLevel level, StringView tag, StringView message);
private:
std::list<std::unique_ptr<ILogSource>> sources_;
};
// TODO: Remove argument evaluation in Debug.
template <typename... TArgs>
void Debug([[maybe_unused]] TArgs&&... args) {
#ifdef CRU_DEBUG
Logger::GetInstance()->Log(LogLevel::Debug,
Format(std::forward<TArgs>(args)...));
#endif
}
template <typename... TArgs>
void Info(TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Info,
Format(std::forward<TArgs>(args)...));
}
template <typename... TArgs>
void Warn(TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Warn,
Format(std::forward<TArgs>(args)...));
}
template <typename... TArgs>
void Error(TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Error,
Format(std::forward<TArgs>(args)...));
}
// TODO: Remove argument evaluation in Debug.
template <typename... TArgs>
void TagDebug([[maybe_unused]] StringView tag,
[[maybe_unused]] TArgs&&... args) {
#ifdef CRU_DEBUG
Logger::GetInstance()->Log(LogLevel::Debug, tag,
Format(std::forward<TArgs>(args)...));
#endif
}
template <typename... TArgs>
void TagInfo(StringView tag, TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Info, tag,
Format(std::forward<TArgs>(args)...));
}
template <typename... TArgs>
void TagWarn(StringView tag, TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Warn, tag,
Format(std::forward<TArgs>(args)...));
}
template <typename... TArgs>
void TagError(StringView tag, TArgs&&... args) {
Logger::GetInstance()->Log(LogLevel::Error, tag,
Format(std::forward<TArgs>(args)...));
}
class StdioLogSource : public Object, public virtual ILogSource {
public:
explicit StdioLogSource(bool use_lock = false);
CRU_DELETE_COPY(StdioLogSource)
CRU_DELETE_MOVE(StdioLogSource)
~StdioLogSource() override;
public:
void Write(LogLevel level, StringView s) override;
private:
bool use_lock_;
};
} // namespace cru::log
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