ProjectCloudExtension.h

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  CloudProjectExtension.h
 
  Dmitry Vedenko
 
**********************************************************************/
#pragma once
 
#include <atomic>
#include <cstdint>
#include <functional>
#include <memory>
#include <mutex>
#include <optional>
#include <string>
#include <string_view>
#include <vector>
 
#include "ClientData.h"
#include "Observer.h"
 
#include "CloudSyncError.h"
#include "CloudSyncDTO.h"
#include "ProjectUploadOperation.h"
 
class AudacityProject;
class ProjectSerializer;
 
namespace audacity::cloud::audiocom::sync
{
class ProjectUploadOperation;
 
enum class ProjectSyncStatus
{
   Local,
   Unsynced,
   Synced,
   Failed,
   Syncing
};
 
struct CLOUD_AUDIOCOM_API CloudStatusChangedMessage final
{
   ProjectSyncStatus Status { ProjectSyncStatus::Local };
   double Progress {};
   std::optional<CloudSyncError> Error {};
 
   bool IsSyncing() const noexcept;
};
 
class CLOUD_AUDIOCOM_API ProjectCloudExtension final : public ClientData::Base
{
public:
   explicit ProjectCloudExtension(AudacityProject& project);
   ~ProjectCloudExtension() override;
 
   static ProjectCloudExtension& Get(AudacityProject& project);
   static const ProjectCloudExtension& Get(const AudacityProject& project);
 
   bool IsCloudProject() const;
 
   void OnLoad();
 
   void OnSyncStarted();
   void OnSyncResumed(
      std::shared_ptr<ProjectUploadOperation> uploadOperation,
      int64_t missingBlocksCount, bool needsProjectUpload);
   void OnUploadOperationCreated(
      std::shared_ptr<ProjectUploadOperation> uploadOperation);
   void OnBlocksHashed(ProjectUploadOperation& uploadOperation);
   void OnSnapshotCreated(
      const ProjectUploadOperation& uploadOperation,
      const CreateSnapshotResponse& response);
   void OnProjectDataUploaded(const ProjectUploadOperation& uploadOperation);
   void OnBlockUploaded(
      const ProjectUploadOperation& uploadOperation, std::string_view blockID,
      bool successful);
   void OnSyncCompleted(
      const ProjectUploadOperation* uploadOperation,
      std::optional<CloudSyncError> error);
 
   void AbortLastUploadOperation();
 
   void CancelSync();
 
   bool IsSyncing() const;
 
   std::string GetCloudProjectId() const;
   std::string GetSnapshotId() const;
 
   void OnUpdateSaved(const ProjectSerializer& serializer);
 
   std::weak_ptr<AudacityProject> GetProject() const;
 
   int64_t GetSavesCount() const;
 
   Observer::Subscription SubscribeStatusChanged(
      std::function<void(const CloudStatusChangedMessage&)> callback,
      bool onUIThread);
 
   std::string GetCloudProjectPage() const;
 
   bool IsBlockLocked(int64_t blockID) const;
 
   ProjectSyncStatus GetCurrentSyncStatus() const;
 
   bool IsFirstSyncDialogShown() const;
   void SetFirstSyncDialogShown(bool shown = true);
 
private:
   struct UploadQueueElement;
   struct CloudStatusChangedNotifier;
 
   void UpdateIdFromDatabase();
 
   void UnsafeUpdateProgress();
   void Publish(CloudStatusChangedMessage cloudStatus, bool canMerge);
 
   void MarkProjectSynced(bool success);
 
   UploadQueueElement*
   UnsafeFindUploadQueueElement(const ProjectUploadOperation& uploadOperation);
   const UploadQueueElement* UnsafeFindUploadQueueElement(
      const ProjectUploadOperation& uploadOperation) const;
 
   void OnProjectPathChanged();
 
   AudacityProject& mProject;
 
   Observer::Subscription mProjectPathChangedSubscription;
 
   mutable std::mutex mIdentifiersMutex;
   std::string mProjectId;
   std::string mSnapshotId;
 
   std::mutex mUploadQueueMutex;
   std::vector<std::shared_ptr<UploadQueueElement>> mUploadQueue;
 
   mutable std::mutex mStatusMutex;
   CloudStatusChangedMessage mLastStatus;
 
   std::unique_ptr<CloudStatusChangedNotifier> mAsyncStateNotifier;
   std::unique_ptr<CloudStatusChangedNotifier> mUIStateNotifier;
   std::atomic<bool> mUINotificationPending { false };
}; // class ProjectCloudExtension
 
} // namespace audacity::cloud::audiocom::sync