/*
 * © Copyright 2014 – Urheberrechtshinweis
 * Alle Rechte vorbehalten / All Rights Reserved
 *
 * Programmcode ist urheberrechtlich geschuetzt.
 * Das Urheberrecht liegt, soweit nicht ausdruecklich anders gekennzeichnet, bei Frank Ebner.
 * Keine Verwendung ohne explizite Genehmigung.
 * (vgl. § 106 ff UrhG / § 97 UrhG)
 */

#ifndef FS_FILE_H
#define FS_FILE_H

#include <string>
#include <vector>




#if __cplusplus > 201103L

	// use new cross-platform std::experimental stuff
	#include <experimental/filesystem>

namespace FS {

	class File {

		std::experimental::filesystem::path path;

	public:

		File(const std::string& fileOrFolder) : path(fileOrFolder) {

		}

		bool exists() const {
			return std::experimental::filesystem::exists(path);
		}

		std::vector<File> listFiles() const {
			std::vector<File> res;
			for (std::experimental::filesystem::directory_entry entry : std::experimental::filesystem::directory_iterator(path)) {
				const std::string abs = entry.path().string();
				res.push_back(File(abs));
			}
			return res;
		}

		std::string getPath() const {
			return path.string();
		}

		std::string getFilename() const {
			return path.filename().string();
		}

	};

}

#else

	// use linux-only fallback

	#include <dirent.h>
	#include <sys/stat.h>

namespace FS {

	class File {

		std::string path;

	public:

		File(const std::string& fileOrFolder) : path(fileOrFolder) {

		}

		bool exists() const {
			struct stat st;
			int res = stat(path.c_str(), &st );
			return res == 0;
		}

		/** list of all files/folders within the current folder */
		std::vector<File> listFiles() const {

			std::vector<File> res;

			DIR* dir;

			dir = opendir(path.c_str());
			if (!dir) {throw Exception("failed to open folder " + path);}

			// fetch all entries
			while(true) {
				dirent* entry = readdir(dir);
				if (!entry) {break;}
				const std::string abs = path + "/" + entry->d_name;
				res.push_back(File(abs));
			}

			return res;

		}

		const std::string& getPath() const {
			return path;
		}

		const std::string getFilename() const {
			const size_t lastSlash = path.find_last_of("/");
			if (std::string::npos == lastSlash) {return path;}
			std::string name = path.substr(lastSlash+1);
			return name;
		}

	};

}
#endif

#endif // FS_FILE_H