DirectoryRegister.h

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//
// Created by Nico Schäfer on 08/01/18.
//
 
#ifndef JODA_DIRECTORYREGISTER_H
#define JODA_DIRECTORYREGISTER_H
 
#include <boost/optional.hpp>
#include <filesystem>
#include <mutex>
#include <unordered_set>
 
namespace fs = std::filesystem;
 
namespace joda::filesystem {
class DirectoryAlreadyInUseException : std::exception {};
 
class DirectoryRegister {
 public:
  static DirectoryRegister& getInstance() {
    static DirectoryRegister instance;  // Guaranteed to be destroyed.
    // Instantiated on first use.
    return instance;
  }
 
  DirectoryRegister(DirectoryRegister const&) = delete;
  void operator=(DirectoryRegister const&) = delete;
 
  virtual ~DirectoryRegister();
 
  // Register new directory
  bool registerDirectory(const std::string& dir, bool checkDuplicate);
  bool registerDirectory(const fs::path& dir, bool checkDuplicate);
 
  bool removeDirectory(const std::string& dir);
  bool removeDirectory(const fs::path& dir);
 
  boost::optional<std::string> getTMPDir(const std::string& name);
  std::string getUniqueDir();
 
 protected:
  bool createDir(const fs::path& dir, bool checkExisting = false);
  bool removeDir(const fs::path& dir);
  std::unordered_set<std::string> dirs{};
  unsigned long currID = 0;
  std::mutex mut;
 
 private:
  DirectoryRegister() {}
};
}  // namespace joda::filesystem
 
#endif  // JODA_DIRECTORYREGISTER_H