NewChunkHandler.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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.
 */
 
#pragma once
 
#include "WriteFileHandler.h"
 
namespace vrs {
 
class NewChunkHandler {
 public:
  virtual ~NewChunkHandler() = default;
  virtual void newChunk(const string& path, size_t index, bool isLastChunk) = 0;
};
 
class NewChunkNotifier {
 public:
  NewChunkNotifier(WriteFileHandler& file, const std::unique_ptr<NewChunkHandler>& chunkHandler)
      : chunkHandler_{chunkHandler.get()} {
    if (chunkHandler_ != nullptr) {
      file.getCurrentChunk(path_, index_);
    }
  }
  void notify(size_t indexOffset = 0, bool isLastChunk = false) {
    if (chunkHandler_ != nullptr) {
      chunkHandler_->newChunk(path_, index_ + indexOffset, isLastChunk);
    }
  }
 
 private:
  NewChunkHandler* chunkHandler_;
  string path_;
  size_t index_{};
};
 
} // namespace vrs