mp/include/util.h

#ifndef UTIL_H
#define UTIL_H

#include <filesystem>
#include <algorithm>
#include <string>
#include <array>
#include <cstring>
#include <string_view>
enum class FileType {
	MUSIC,
	VIDEO,
	IMG,
	ERRORTYPE
};

const std::array<std::string_view, 1> MusicFileExtensive = {
	"mp3"
};

const std::array<std::string_view, 1> VideoFileExtensive = {
	"mp4"
};

const std::array<std::string_view, 3> ImgFileExtensive = {
	"jpeg",
	"jpg",
	"png",
};

using namespace std::filesystem;
class Util {
private:
	static std::string_view GetFileExtensive(const path& filepath) {
		static std::string ext = filepath.extension().string();
		ext.erase(std::ranges::remove_if(ext, [](char c) {return c == '.'; }).begin(), ext.end());
		return std::string_view{ ext.c_str() };
	}
	static bool IsMusic(const path& filepath) {
		const auto ext = GetFileExtensive(filepath);
		for (const auto& it : MusicFileExtensive) {
			if (it == ext)
				return true;
		}
		return false;
	}

	static bool IsVideo(const path& filepath) {
		const auto ext = GetFileExtensive(filepath);
		for (const auto& it : VideoFileExtensive) {
			if (it == ext)
				return true;
		}
		return false;
	}

	static bool IsImg(const path& filepath) {
		const auto ext = GetFileExtensive(filepath);
		for (const auto& it : ImgFileExtensive) {
			if (it == ext)
				return true;
		}
		return false;
	}
public:
	static FileType GetFileType(const path& filepath) {
		if (IsMusic(filepath)) return FileType::MUSIC;
		if (IsVideo(filepath)) return FileType::VIDEO;
		if (IsImg(filepath))   return FileType::IMG;
		return FileType::ERRORTYPE;
	}
};

#endif