cpp-utility/Time.h at main · RaidcoreGG/cpp-utility · GitHub

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///----------------------------------------------------------------------------------------------------
/// Copyright (c) Raidcore.GG - All rights reserved.
///
/// Name         :  Time.h
/// Description  :  Contains a variety of utility for time based functions.
/// Authors      :  K. Bieniek
///----------------------------------------------------------------------------------------------------

#pragma once

#include <chrono>
#include <iomanip>
#include <sstream>
#include <string>

///----------------------------------------------------------------------------------------------------
/// Time Namespace
///----------------------------------------------------------------------------------------------------
namespace Time
{
	///----------------------------------------------------------------------------------------------------
	/// GetTimestamp:
	/// 	Returns the current timestamp.
	///----------------------------------------------------------------------------------------------------
	inline long long GetTimestamp()
	{
		return std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()).count();
	}

	///----------------------------------------------------------------------------------------------------
	/// GetTimestamp:
	/// 	Returns the current timestamp in milliseconds.
	///----------------------------------------------------------------------------------------------------
	inline long long GetTimestampMs()
	{
		return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
	}

	///----------------------------------------------------------------------------------------------------
	/// GetMilliseconds:
	/// 	Returns the current milliseconds.
	///----------------------------------------------------------------------------------------------------
	inline int GetMilliseconds()
	{
		return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count() % 1000;
	}

	///----------------------------------------------------------------------------------------------------
	/// LastModifiedToTimestamp:
	/// 	Converts a "Last-Modified" HTTP header to a timestamp.
	///----------------------------------------------------------------------------------------------------
	inline long long LastModifiedToTimestamp(const std::string& aLastModified)
	{
		std::tm tm = {};
		std::istringstream ss(aLastModified);
		ss >> std::get_time(&tm, "%a, %d %b %Y %H:%M:%S GMT");
		if (ss.fail())
		{
			return -1;
		}
		tm.tm_isdst = 0;
		std::time_t t = std::mktime(&tm);
		if (t == -1)
		{
			return -1;
		}

		return t;
	}

	///----------------------------------------------------------------------------------------------------
	/// GetYear:
	/// 	Returns the year.
	///----------------------------------------------------------------------------------------------------
	inline int GetYear()
	{
		std::time_t t = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
		tm local_tm{};
		if (localtime_s(&local_tm, &t))
		{
			return 0;
		}
		return local_tm.tm_year;
	}

	///----------------------------------------------------------------------------------------------------
	/// GetMonth:
	/// 	Returns the month 1-12.
	///----------------------------------------------------------------------------------------------------
	inline int GetMonth()
	{
		std::time_t t = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
		tm local_tm{};
		if (localtime_s(&local_tm, &t))
		{
			return 0;
		}
		return local_tm.tm_mon + 1;
	}

	///----------------------------------------------------------------------------------------------------
	/// GetDay:
	/// 	Returns the day of the month 1-31.
	///----------------------------------------------------------------------------------------------------
	inline int GetDay()
	{
		std::time_t t = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
		tm local_tm{};
		if (localtime_s(&local_tm, &t))
		{
			return 0;
		}
		return local_tm.tm_mday;
	}

	///----------------------------------------------------------------------------------------------------
	/// GetWeekday:
	/// 	Returns the current weekday starting Sunday = 0.
	///----------------------------------------------------------------------------------------------------
	inline int GetWeekday()
	{
		std::time_t t = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
		tm local_tm{};
		if (localtime_s(&local_tm, &t))
		{
			return 0;
		}
		return local_tm.tm_wday;
	}
}