BlockHasher.h

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  BlockHasher.h
 
  Dmitry Vedenko
 
**********************************************************************/
#pragma once
 
#include <cstdint>
#include <functional>
#include <string>
#include <memory>
#include <vector>
#include <unordered_map>
 
#include "CloudSyncDTO.h"
 
namespace audacity::cloud::audiocom::sync
{
class BlockHashCache /* not final */
{
public:
   virtual ~BlockHashCache() = default;
 
   virtual bool GetHash(int64_t blockId, std::string& hash) const = 0;
   virtual void UpdateHash(int64_t blockId, const std::string& hash) = 0;
};
 
class BlockHasher final
{
public:
   BlockHasher();
   ~BlockHasher();
 
   BlockHasher(const BlockHasher&) = delete;
   BlockHasher(BlockHasher&&) = delete;
   BlockHasher& operator=(const BlockHasher&) = delete;
   BlockHasher& operator=(BlockHasher&&) = delete;
 
   bool ComputeHashes(BlockHashCache& cache, std::vector<LockedBlock> blocks, std::function<void()> onComplete);
   bool IsReady() const;
 
   std::vector<std::pair<int64_t, std::string>> TakeResult();
 
private:
   class Workers;
   std::unique_ptr<Workers> mWorkers;
};
} // namespace audacity::cloud::audiocom::sync