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#ifndef MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_
#define MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_

#include <string>

#include "absl/strings/string_view.h"

namespace mozc {
namespace storage {

class StringStorageInterface {
 public:
  virtual ~StringStorageInterface() = default;

  virtual bool Load(std::string* output) const = 0;
  virtual bool Save(const std::string& input) const = 0;
};

class EncryptedStringStorage : public StringStorageInterface {
 public:
  explicit EncryptedStringStorage(const absl::string_view filename)
      : filename_(filename) {}
  EncryptedStringStorage(const EncryptedStringStorage&) = delete;
  EncryptedStringStorage& operator=(const EncryptedStringStorage&) = delete;

  bool Load(std::string* output) const override;
  bool Save(const std::string& input) const override;

  const std::string& filename() const { return filename_; }

 protected:
  virtual bool Encrypt(const std::string& salt, std::string* data) const;
  virtual bool Decrypt(const std::string& salt, std::string* data) const;

 private:
  std::string filename_;
};

}  // namespace storage
}  // namespace mozc

#endif  // MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_
