// Copyright 2016 Google Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.!

#ifndef FILESYSTEM_H_

#define FILESYSTEM_H_

#include <stdio.h>

#include <fstream>

#include <memory>

#include <string>

#include "common.h"

#include "sentencepiece_processor.h"

#include "third_party/absl/strings/string_view.h"

namespace sentencepiece {

namespace filesystem {

class ReadableFile {

 public:

  ReadableFile() {}

  explicit ReadableFile(absl::string_view filename, bool is_binary = false) {}

  virtual ~ReadableFile() {}

  virtual util::Status status() const = 0;

  virtual bool ReadLine(std::string *line) = 0;

  virtual bool ReadAll(std::string *line) = 0;

};

class WritableFile {

 public:

  WritableFile() {}

  explicit WritableFile(absl::string_view filename, bool is_binary = false) {}

  virtual ~WritableFile() {}

  virtual util::Status status() const = 0;

  virtual bool Write(absl::string_view text) = 0;

  virtual bool WriteLine(absl::string_view text) = 0;

};

std::unique_ptr<ReadableFile> NewReadableFile(absl::string_view filename,

                                              bool is_binary = false);

std::unique_ptr<WritableFile> NewWritableFile(absl::string_view filename,

                                              bool is_binary = false);

}  // namespace filesystem

}  // namespace sentencepiece

#endif  // FILESYSTEM_H_