ProjectCloudExtension.cpp

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  ProjectCloudExtension.h
 
  Dmitry Vedenko
 
**********************************************************************/
 
#include "ProjectCloudExtension.h"
 
#include <algorithm>
#include <cstring>
#include <vector>
 
#include "CloudLibrarySettings.h"
#include "CloudSyncDTO.h"
#include "ProjectUploadOperation.h"
#include "ServiceConfig.h"
 
#include "CodeConversions.h"
 
#include "Project.h"
 
#include "ProjectFileIO.h"
#include "ProjectSerializer.h"
 
#include "BasicUI.h"
 
#include "MemoryX.h"
 
#include "CloudProjectsDatabase.h"
 
#include "Track.h"
 
namespace audacity::cloud::audiocom::sync
{
namespace
{
const AttachedProjectObjects::RegisteredFactory key {
   [](AudacityProject& project)
   { return std::make_shared<ProjectCloudExtension>(project); }
};
} // namespace
 
struct ProjectCloudExtension::UploadQueueElement final
{
   ProjectUploadData Data;
   std::shared_ptr<ProjectUploadOperation> Operation;
   std::optional<CreateSnapshotResponse> SnapshotResponse;
 
   int64_t BlocksHandled { 0 };
   int64_t BlocksTotal { 0 };
 
   bool ProjectDataUploaded { false };
   bool ReadyForUpload { false };
   bool Synced { false };
};
 
struct ProjectCloudExtension::CloudStatusChangedNotifier final :
    private Observer::Publisher<CloudStatusChangedMessage>
{
   void Enqueue(CloudStatusChangedMessage message, bool canMerge)
   {
      auto lock = std::lock_guard { QueueMutex };
 
      if (Queue.empty() || !canMerge)
         Queue.push_back({ message, canMerge });
      else if (Queue.back().second)
         Queue.back().first = message;
      else
         Queue.push_back({ message, canMerge });
   }
 
   void PublishSafe()
   {
      QueueType queue;
      {
         auto lock = std::lock_guard { QueueMutex };
         std::swap(queue, Queue);
      }
 
      auto lock = std::lock_guard { ObserverMutex };
 
      for (const auto& [message, _] : queue)
         Publish(message);
   }
 
   Observer::Subscription
   SubscribeSafe(std::function<void(const CloudStatusChangedMessage&)> callback)
   {
      auto lock = std::lock_guard { ObserverMutex };
      return Subscribe(std::move(callback));
   }
 
   using QueueType = std::vector<std::pair<CloudStatusChangedMessage, bool>>;
 
   std::mutex QueueMutex;
   QueueType Queue;
   std::recursive_mutex ObserverMutex;
};
 
ProjectCloudExtension::ProjectCloudExtension(AudacityProject& project)
    : mProject { project }
    , mProjectPathChangedSubscription { ProjectFileIO::Get(project).Subscribe(
         [this](auto message)
         {
            if (message == ProjectFileIOMessage::ProjectFilePathChange)
               OnProjectPathChanged();
         }) }
    , mAsyncStateNotifier { std::make_unique<CloudStatusChangedNotifier>() }
    , mUIStateNotifier { std::make_unique<CloudStatusChangedNotifier>() }
{
   if (!ProjectFileIO::Get(project).IsTemporary())
      UpdateIdFromDatabase();
}
 
ProjectCloudExtension::~ProjectCloudExtension() = default;
 
ProjectCloudExtension& ProjectCloudExtension::Get(AudacityProject& project)
{
   return project.AttachedObjects::Get<ProjectCloudExtension&>(key);
}
 
const ProjectCloudExtension&
ProjectCloudExtension::Get(const AudacityProject& project)
{
   return Get(const_cast<AudacityProject&>(project));
}
 
bool ProjectCloudExtension::IsCloudProject() const
{
   auto lock = std::lock_guard { mIdentifiersMutex };
   return !mProjectId.empty();
}
 
void ProjectCloudExtension::OnLoad()
{
   UpdateIdFromDatabase();
}
 
void ProjectCloudExtension::OnSyncStarted()
{
   auto element = std::make_shared<UploadQueueElement>();
 
   element->Data.Tracks = TrackList::Create(nullptr);
 
   for (auto pTrack : TrackList::Get(mProject))
   {
      if (pTrack->GetId() == TrackId {})
         // Don't copy a pending added track
         continue;
      element->Data.Tracks->Add(pTrack->Duplicate());
   }
 
   auto lock = std::lock_guard { mUploadQueueMutex };
   mUploadQueue.push_back(std::move(element));
}
 
void cloud::audiocom::sync::ProjectCloudExtension::OnSyncResumed(
   std::shared_ptr<ProjectUploadOperation> uploadOperation,
   int64_t missingBlocksCount, bool needsProjectUpload)
{
   auto element                 = std::make_shared<UploadQueueElement>();
   element->Operation           = uploadOperation;
   element->BlocksTotal         = missingBlocksCount;
   element->ProjectDataUploaded = !needsProjectUpload;
 
   {
      auto lock = std::lock_guard { mUploadQueueMutex };
      mUploadQueue.push_back(element);
   }
 
   uploadOperation->Start();
   UnsafeUpdateProgress();
}
 
void ProjectCloudExtension::OnUploadOperationCreated(
   std::shared_ptr<ProjectUploadOperation> uploadOperation)
{
   auto lock = std::lock_guard { mUploadQueueMutex };
   assert(mUploadQueue.size() > 0);
 
   if (mUploadQueue.empty())
      return;
 
   mUploadQueue.back()->Operation = uploadOperation;
   UnsafeUpdateProgress();
}
 
void ProjectCloudExtension::OnBlocksHashed(
   ProjectUploadOperation& uploadOperation)
{
   auto lock    = std::lock_guard { mUploadQueueMutex };
   auto element = UnsafeFindUploadQueueElement(uploadOperation);
 
   if (!element)
      return;
 
   element->ReadyForUpload = true;
   uploadOperation.Start();
}
 
void ProjectCloudExtension::OnSnapshotCreated(
   const ProjectUploadOperation& uploadOperation,
   const CreateSnapshotResponse& response)
{
   auto& cloudDatabase = CloudProjectsDatabase::Get();
 
   const auto projectFilePath =
      audacity::ToUTF8(ProjectFileIO::Get(mProject).GetFileName());
 
   auto previousDbData = cloudDatabase.GetProjectDataForPath(projectFilePath);
 
   DBProjectData dbData;
 
   if (previousDbData)
      dbData = *previousDbData;
 
   dbData.ProjectId    = response.Project.Id;
   dbData.SnapshotId   = response.Snapshot.Id;
   dbData.LocalPath    = projectFilePath;
   dbData.LastModified = wxDateTime::Now().GetTicks();
   dbData.LastRead     = dbData.LastModified;
   dbData.SyncStatus   = DBProjectData::SyncStatusUploading;
   dbData.SavesCount++;
 
   cloudDatabase.UpdateProjectData(dbData);
   cloudDatabase.SetProjectUserSlug(
      response.Project.Id, response.Project.Username);
 
   {
      auto lock = std::lock_guard { mIdentifiersMutex };
 
      mProjectId  = response.Project.Id;
      mSnapshotId = response.Snapshot.Id;
   }
 
   auto lock    = std::lock_guard { mUploadQueueMutex };
   auto element = UnsafeFindUploadQueueElement(uploadOperation);
 
   if (!element)
      return;
 
   element->BlocksTotal      = response.SyncState.MissingBlocks.size();
   element->SnapshotResponse = response;
 
   UnsafeUpdateProgress();
}
 
void ProjectCloudExtension::OnProjectDataUploaded(
   const ProjectUploadOperation& uploadOperation)
{
   auto lock    = std::lock_guard { mUploadQueueMutex };
   auto element = UnsafeFindUploadQueueElement(uploadOperation);
 
   if (!element)
      return;
 
   element->ProjectDataUploaded = true;
 
   UnsafeUpdateProgress();
}
 
void ProjectCloudExtension::OnBlockUploaded(
   const ProjectUploadOperation& uploadOperation, std::string_view blockID,
   bool successful)
{
   auto lock    = std::lock_guard { mUploadQueueMutex };
   auto element = UnsafeFindUploadQueueElement(uploadOperation);
 
   if (!element)
      return;
 
   element->BlocksHandled++;
 
   UnsafeUpdateProgress();
}
 
void ProjectCloudExtension::OnSyncCompleted(
   const ProjectUploadOperation* uploadOperation,
   std::optional<CloudSyncError> error)
{
   auto lock = std::lock_guard { mUploadQueueMutex };
 
   auto element = uploadOperation != nullptr ?
                     UnsafeFindUploadQueueElement(*uploadOperation) :
                     nullptr;
 
   if (element != nullptr)
   {
      element->Synced = true;
 
      if (
         error.has_value() && error->Type == CloudSyncError::Aborted &&
         element->SnapshotResponse)
      {
         auto& cloudDatabase = CloudProjectsDatabase::Get();
 
         const auto projectFilePath =
            audacity::ToUTF8(ProjectFileIO::Get(mProject).GetFileName());
 
         auto previousDbData =
            cloudDatabase.GetProjectDataForPath(projectFilePath);
 
         DBProjectData dbData;
 
         if (previousDbData)
            dbData = *previousDbData;
 
         const auto parentId = element->SnapshotResponse->Snapshot.ParentId;
 
         dbData.SnapshotId = parentId;
 
         cloudDatabase.UpdateProjectData(dbData);
 
         {
            auto lock   = std::lock_guard { mIdentifiersMutex };
            mSnapshotId = parentId;
         }
      }
   }
 
   // std::all_of returns true if the range is empty
   if (!std::all_of(
          mUploadQueue.begin(), mUploadQueue.end(),
          [](auto& operation) { return operation->Synced; }))
   {
      UnsafeUpdateProgress();
      return;
   }
 
   mUploadQueue.clear();
 
   MarkProjectSynced(!error.has_value());
 
   Publish(
      { error.has_value() ? ProjectSyncStatus::Failed :
                            ProjectSyncStatus::Synced,
        {},
        error },
      false);
 
   if (!IsCloudProject())
      Publish({ ProjectSyncStatus::Local }, false);
}
 
void ProjectCloudExtension::CancelSync()
{
   std::vector<std::shared_ptr<UploadQueueElement>> queue;
 
   {
      auto lock = std::lock_guard { mUploadQueueMutex };
      std::swap(queue, mUploadQueue);
   }
 
   if (queue.empty())
      return;
 
   for (auto& item : queue)
   {
      if (!item->Operation)
         continue;
 
      item->Operation->Cancel();
   }
}
 
bool ProjectCloudExtension::IsSyncing() const
{
   auto lock = std::lock_guard { mStatusMutex };
 
   return mLastStatus.Status == ProjectSyncStatus::Syncing;
}
 
std::string ProjectCloudExtension::GetCloudProjectId() const
{
   auto lock = std::lock_guard { mIdentifiersMutex };
 
   return mProjectId;
}
 
std::string ProjectCloudExtension::GetSnapshotId() const
{
   auto lock = std::lock_guard { mIdentifiersMutex };
 
   return mSnapshotId;
}
 
void ProjectCloudExtension::OnUpdateSaved(const ProjectSerializer& serializer)
{
   auto lock = std::lock_guard { mUploadQueueMutex };
 
   if (mUploadQueue.empty())
      return;
 
   const size_t dictSize    = serializer.GetDict().GetSize();
   const size_t projectSize = serializer.GetData().GetSize();
 
   std::vector<uint8_t> data;
   data.resize(projectSize + dictSize + sizeof(uint64_t));
 
   const uint64_t dictSizeData =
      IsLittleEndian() ? dictSize : SwapIntBytes(dictSize);
 
   std::memcpy(data.data(), &dictSizeData, sizeof(uint64_t));
 
   uint64_t offset = sizeof(dictSize);
 
   for (const auto [chunkData, size] : serializer.GetDict())
   {
      std::memcpy(data.data() + offset, chunkData, size);
      offset += size;
   }
 
   for (const auto [chunkData, size] : serializer.GetData())
   {
      std::memcpy(data.data() + offset, chunkData, size);
      offset += size;
   }
 
   mUploadQueue.back()->Data.ProjectSnapshot = std::move(data);
 
   if (mUploadQueue.back()->Operation)
   {
      mUploadQueue.back()->Operation->SetUploadData(mUploadQueue.back()->Data);
 
      auto dbData = CloudProjectsDatabase::Get().GetProjectData(mProjectId);
 
      if (dbData)
      {
         dbData->LocalPath =
            audacity::ToUTF8(ProjectFileIO::Get(mProject).GetFileName());
         CloudProjectsDatabase::Get().UpdateProjectData(*dbData);
      }
   }
   else
      Publish({ ProjectSyncStatus::Failed }, false);
}
 
std::weak_ptr<AudacityProject> ProjectCloudExtension::GetProject() const
{
   return mProject.weak_from_this();
}
 
int64_t ProjectCloudExtension::GetSavesCount() const
{
   auto lock = std::lock_guard { mIdentifiersMutex };
 
   if (mProjectId.empty())
      return 0;
 
   auto& cloudDatabase = CloudProjectsDatabase::Get();
   auto dbData         = cloudDatabase.GetProjectData(mProjectId);
 
   if (!dbData)
      return 0;
 
   return dbData->SavesCount;
}
 
Observer::Subscription ProjectCloudExtension::SubscribeStatusChanged(
   std::function<void(const CloudStatusChangedMessage&)> callback,
   bool onUIThread)
{
   return onUIThread ? mUIStateNotifier->SubscribeSafe(std::move(callback)) :
                       mAsyncStateNotifier->SubscribeSafe(std::move(callback));
}
 
void ProjectCloudExtension::UpdateIdFromDatabase()
{
   auto& projectFileIO = ProjectFileIO::Get(mProject);
   auto& cloudDatabase = CloudProjectsDatabase::Get();
 
   auto projectData = cloudDatabase.GetProjectDataForPath(
      audacity::ToUTF8(projectFileIO.GetFileName()));
 
   if (!projectData)
      return;
 
   {
      auto lock = std::lock_guard { mIdentifiersMutex };
 
      mProjectId  = projectData->ProjectId;
      mSnapshotId = projectData->SnapshotId;
   }
 
   Publish(
      {
         projectData->SyncStatus ==
               DBProjectData::SyncStatusType::SyncStatusSynced ?
            ProjectSyncStatus::Synced :
            ProjectSyncStatus::Unsynced,
      },
      false);
}
 
void ProjectCloudExtension::UnsafeUpdateProgress()
{
   if (mUploadQueue.empty())
      return;
 
   int64_t handledElements = 0;
   int64_t totalElements   = 0;
 
   for (auto& element : mUploadQueue)
   {
      handledElements +=
         element->BlocksHandled + int(element->ProjectDataUploaded);
      totalElements += element->BlocksTotal + 1;
   }
 
   assert(totalElements > 0);
 
   Publish(
      { ProjectSyncStatus::Syncing,
        double(handledElements) / double(totalElements) },
      true);
}
 
void ProjectCloudExtension::Publish(
   CloudStatusChangedMessage cloudStatus, bool canMerge)
{
   {
      auto lock   = std::lock_guard { mStatusMutex };
      mLastStatus = cloudStatus;
   }
 
   mAsyncStateNotifier->Enqueue(cloudStatus, canMerge);
   mUIStateNotifier->Enqueue(cloudStatus, canMerge);
 
   mAsyncStateNotifier->PublishSafe();
 
   if (BasicUI::IsUiThread())
   {
      mUINotificationPending.store(false);
      mUIStateNotifier->PublishSafe();
   }
   else if (!mUINotificationPending.exchange(true))
   {
      BasicUI::CallAfter(
         [this]
         {
            if (mUINotificationPending.exchange(false))
               mUIStateNotifier->PublishSafe();
         });
   }
}
 
void ProjectCloudExtension::MarkProjectSynced(bool success)
{
   auto& cloudDatabase = CloudProjectsDatabase::Get();
 
   const auto projectFilePath =
      audacity::ToUTF8(ProjectFileIO::Get(mProject).GetFileName());
 
   auto previousDbData = cloudDatabase.GetProjectDataForPath(projectFilePath);
 
   DBProjectData dbData;
 
   if (previousDbData)
      dbData = *previousDbData;
 
   dbData.LastModified = wxDateTime::Now().GetTicks();
   dbData.LastRead     = dbData.LastModified;
   dbData.SyncStatus   = success ? DBProjectData::SyncStatusSynced :
                                   DBProjectData::SyncStatusUploading;
 
   cloudDatabase.UpdateProjectData(dbData);
}
 
ProjectCloudExtension::UploadQueueElement*
ProjectCloudExtension::UnsafeFindUploadQueueElement(
   const ProjectUploadOperation& uploadOperation)
{
   auto it = std::find_if(
      mUploadQueue.begin(), mUploadQueue.end(),
      [&](const auto& element)
      { return element->Operation.get() == &uploadOperation; });
 
   return it != mUploadQueue.end() ? it->get() : nullptr;
}
 
const ProjectCloudExtension::UploadQueueElement*
ProjectCloudExtension::UnsafeFindUploadQueueElement(
   const ProjectUploadOperation& uploadOperation) const
{
   return const_cast<ProjectCloudExtension*>(this)
      ->UnsafeFindUploadQueueElement(uploadOperation);
}
 
void ProjectCloudExtension::OnProjectPathChanged()
{
   bool wasCloudProject = false;
 
   {
      auto lock = std::lock_guard { mIdentifiersMutex };
 
      wasCloudProject = !mProjectId.empty();
 
      mProjectId.clear();
      mSnapshotId.clear();
   }
 
   // This will set the status to cloud if the project is a cloud project
   UpdateIdFromDatabase();
 
   if (mProjectId.empty() && wasCloudProject)
      Publish({ ProjectSyncStatus::Local }, false);
}
 
std::string ProjectCloudExtension::GetCloudProjectPage() const
{
   const auto projectId =
      ProjectCloudExtension::Get(mProject).GetCloudProjectId();
 
   const auto userSlug =
      CloudProjectsDatabase::Get().GetProjectUserSlug(projectId);
 
   return GetServiceConfig().GetProjectPageUrl(userSlug, projectId);
}
 
bool ProjectCloudExtension::IsBlockLocked(int64_t blockID) const
{
   // Try load the project info first based on the
   // file path
   const_cast<ProjectCloudExtension*>(this)->OnLoad();
 
   const auto projectId = GetCloudProjectId();
 
   if (projectId.empty())
      return false;
 
   return CloudProjectsDatabase::Get().IsProjectBlockLocked(projectId, blockID);
}
 
ProjectSyncStatus ProjectCloudExtension::GetCurrentSyncStatus() const
{
   auto lock = std::lock_guard {
      const_cast<ProjectCloudExtension*>(this)->mStatusMutex
   };
 
   return mLastStatus.Status;
}
 
bool ProjectCloudExtension::IsFirstSyncDialogShown() const
{
   auto lock = std::lock_guard { mIdentifiersMutex };
 
   if (mProjectId.empty())
      return false;
 
   return CloudProjectsDatabase::Get().IsFirstSyncDialogShown(mProjectId);
}
 
void ProjectCloudExtension::SetFirstSyncDialogShown(bool shown)
{
   auto lock = std::lock_guard { mIdentifiersMutex };
 
   if (mProjectId.empty())
      return;
 
   CloudProjectsDatabase::Get().SetFirstSyncDialogShown(mProjectId, shown);
}
 
bool CloudStatusChangedMessage::IsSyncing() const noexcept
{
   return Status == ProjectSyncStatus::Syncing;
}
 
} // namespace audacity::cloud::audiocom::sync