/// <summary>
        /// Receives a stream and bakes into the existing revit file.
        /// </summary>
        /// <param name="state"></param>
        /// <returns></returns>
        public override async Task <StreamState> ReceiveStream(StreamState state)
        {
            ConversionErrors.Clear();
            OperationErrors.Clear();

            var kit       = KitManager.GetDefaultKit();
            var converter = kit.LoadConverter(ConnectorRevitUtils.RevitAppName);

            converter.SetContextDocument(CurrentDoc.Document);
            var previouslyReceiveObjects = state.ReceivedObjects;

            var transport = new ServerTransport(state.Client.Account, state.Stream.id);

            string referencedObject = state.Commit.referencedObject;

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(null);
            }

            //if "latest", always make sure we get the latest commit when the user clicks "receive"
            if (state.Commit.id == "latest")
            {
                var res = await state.Client.BranchGet(state.CancellationTokenSource.Token, state.Stream.id, state.Branch.name, 1);

                referencedObject = res.commits.items.FirstOrDefault().referencedObject;
            }

            var commit = state.Commit;



            var commitObject = await Operations.Receive(
                referencedObject,
                state.CancellationTokenSource.Token,
                transport,
                onProgressAction : dict => UpdateProgress(dict, state.Progress),
                onErrorAction : (s, e) =>
            {
                OperationErrors.Add(e);
                state.Errors.Add(e);
                state.CancellationTokenSource.Cancel();
            },
                onTotalChildrenCountKnown : count => Execute.PostToUIThread(() => state.Progress.Maximum = count)
                );

            if (OperationErrors.Count != 0)
            {
                Globals.Notify("Failed to get commit.");
                return(state);
            }

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(null);
            }



            // Bake the new ones.
            Queue.Add(() =>
            {
                using (var t = new Transaction(CurrentDoc.Document, $"Baking stream {state.Stream.name}"))
                {
                    var failOpts = t.GetFailureHandlingOptions();
                    failOpts.SetFailuresPreprocessor(new ErrorEater(converter));
                    failOpts.SetClearAfterRollback(true);
                    t.SetFailureHandlingOptions(failOpts);

                    t.Start();
                    var flattenedObjects = FlattenCommitObject(commitObject, converter);
                    // needs to be set for editing to work
                    converter.SetPreviousContextObjects(previouslyReceiveObjects);
                    // needs to be set for openings in floors and roofs to work
                    converter.SetContextObjects(flattenedObjects.Select(x => new ApplicationPlaceholderObject {
                        applicationId = x.applicationId, NativeObject = x
                    }).ToList());
                    var newPlaceholderObjects = ConvertReceivedObjects(flattenedObjects, converter, state);
                    // receive was cancelled by user
                    if (newPlaceholderObjects == null)
                    {
                        converter.ConversionErrors.Add(new Exception("fatal error: receive cancelled by user"));
                        t.RollBack();
                        return;
                    }

                    DeleteObjects(previouslyReceiveObjects, newPlaceholderObjects);

                    state.ReceivedObjects = newPlaceholderObjects;

                    t.Commit();

                    state.Errors.AddRange(converter.ConversionErrors);
                }
            });

            Executor.Raise();

            while (Queue.Count > 0)
            {
                //wait to let queue finish
            }

            if (converter.ConversionErrors.Any(x => x.Message.Contains("fatal error")))
            {
                // the commit is being rolled back
                return(null);
            }

            try
            {
                await state.RefreshStream();

                WriteStateToFile();
            }
            catch (Exception e)
            {
                WriteStateToFile();
                state.Errors.Add(e);
                Globals.Notify($"Receiving done, but failed to update stream from server.\n{e.Message}");
            }

            return(state);
        }
        /// <summary>
        /// Converts the Revit elements that have been added to the stream by the user, sends them to
        /// the Server and the local DB, and creates a commit with the objects.
        /// </summary>
        /// <param name="state">StreamState passed by the UI</param>
        public override async Task <StreamState> SendStream(StreamState state)
        {
            ConversionErrors.Clear();
            OperationErrors.Clear();

            var kit       = KitManager.GetDefaultKit();
            var converter = kit.LoadConverter(ConnectorRevitUtils.RevitAppName);

            converter.SetContextDocument(CurrentDoc.Document);

            var streamId = state.Stream.id;
            var client   = state.Client;

            var selectedObjects = new List <Element>();

            if (state.Filter != null)
            {
                selectedObjects         = GetSelectionFilterObjects(state.Filter, converter);
                state.SelectedObjectIds = selectedObjects.Select(x => x.UniqueId).ToList();
            }
            else //selection was by cursor
            {
                // TODO: update state by removing any deleted or null object ids
                selectedObjects = state.SelectedObjectIds.Select(x => CurrentDoc.Document.GetElement(x)).Where(x => x != null).ToList();
            }


            if (!selectedObjects.Any())
            {
                state.Errors.Add(new Exception("There are zero objects to send. Please use a filter, or set some via selection."));
                return(state);
            }

            converter.SetContextObjects(selectedObjects.Select(x => new ApplicationPlaceholderObject {
                applicationId = x.UniqueId
            }).ToList());

            var commitObject = new Base();

            var conversionProgressDict = new ConcurrentDictionary <string, int>();

            conversionProgressDict["Conversion"] = 0;
            Execute.PostToUIThread(() => state.Progress.Maximum = selectedObjects.Count());
            var convertedCount = 0;

            var placeholders = new List <Base>();

            foreach (var revitElement in selectedObjects)
            {
                try
                {
                    if (revitElement == null)
                    {
                        continue;
                    }

                    if (!converter.CanConvertToSpeckle(revitElement))
                    {
                        state.Errors.Add(new Exception($"Skipping not supported type: {revitElement.GetType()}, name {revitElement.Name}"));
                        continue;
                    }

                    var conversionResult = converter.ConvertToSpeckle(revitElement);

                    conversionProgressDict["Conversion"]++;
                    UpdateProgress(conversionProgressDict, state.Progress);

                    placeholders.Add(new ApplicationPlaceholderObject {
                        applicationId = revitElement.UniqueId, ApplicationGeneratedId = revitElement.UniqueId
                    });

                    convertedCount++;

                    //hosted elements will be returned as `null` by the ConvertToSpeckle method
                    //since they are handled when converting their parents
                    if (conversionResult != null)
                    {
                        var category = $"@{revitElement.Category.Name}";
                        if (commitObject[category] == null)
                        {
                            commitObject[category] = new List <Base>();
                        }
                        ((List <Base>)commitObject[category]).Add(conversionResult);
                    }
                }
                catch (Exception e)
                {
                    state.Errors.Add(e);
                }
            }

            if (converter.Report.ConversionErrorsCount != 0)
            {
                // TODO: Get rid of the custom Error class. It's not needed.
                ConversionErrors.AddRange(converter.Report.ConversionErrors);
                state.Errors.AddRange(converter.Report.ConversionErrors);
            }

            if (convertedCount == 0)
            {
                Globals.Notify("Zero objects converted successfully. Send stopped.");
                return(state);
            }

            Execute.PostToUIThread(() => state.Progress.Maximum = (int)commitObject.GetTotalChildrenCount());

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(state);
            }

            var transports = new List <ITransport>()
            {
                new ServerTransport(client.Account, streamId)
            };

            var objectId = await Operations.Send(
                @object : commitObject,
                cancellationToken : state.CancellationTokenSource.Token,
                transports : transports,
                onProgressAction : dict => UpdateProgress(dict, state.Progress),
                onErrorAction : (s, e) =>
            {
                OperationErrors.Add(e); // TODO!
                state.Errors.Add(e);
                state.CancellationTokenSource.Cancel();
            },
                disposeTransports : true
                );

            if (OperationErrors.Count != 0)
            {
                Globals.Notify("Failed to send.");
                state.Errors.AddRange(OperationErrors);
                return(state);
            }

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(null);
            }

            var actualCommit = new CommitCreateInput()
            {
                streamId          = streamId,
                objectId          = objectId,
                branchName        = state.Branch.name,
                message           = state.CommitMessage != null ? state.CommitMessage : $"Sent {convertedCount} objects from {ConnectorRevitUtils.RevitAppName}.",
                sourceApplication = ConnectorRevitUtils.RevitAppName,
            };

            if (state.PreviousCommitId != null)
            {
                actualCommit.parents = new List <string>()
                {
                    state.PreviousCommitId
                };
            }

            try
            {
                var commitId = await client.CommitCreate(actualCommit);

                await state.RefreshStream();

                state.PreviousCommitId = commitId;

                WriteStateToFile();
                RaiseNotification($"{convertedCount} objects sent to Speckle 🚀");
            }
            catch (Exception e)
            {
                state.Errors.Add(e);
                Globals.Notify($"Failed to create commit.\n{e.Message}");
            }

            return(state);
        }
Пример #3
0
        public override async Task <StreamState> SendStream(StreamState state)
        {
            ConversionErrors.Clear();
            OperationErrors.Clear();

            var kit       = KitManager.GetDefaultKit();
            var converter = kit.LoadConverter(Utils.BentleyAppName);

            if (Control.InvokeRequired)
            {
                Control.Invoke(new SetContextDelegate(converter.SetContextDocument), new object[] { Session.Instance });
            }
            else
            {
                converter.SetContextDocument(Session.Instance);
            }

            var streamId = state.Stream.id;
            var client   = state.Client;

            var selectedObjects = new List <Object>();

            if (state.Filter != null)
            {
                if (Control.InvokeRequired)
                {
                    state.SelectedObjectIds = (List <string>)Control.Invoke(new GetObjectsFromFilterDelegate(GetObjectsFromFilter), new object[] { state.Filter, converter });
                }
                else
                {
                    state.SelectedObjectIds = GetObjectsFromFilter(state.Filter, converter);
                }
            }

            if (state.SelectedObjectIds.Count == 0 && !ExportGridLines)
            {
                RaiseNotification("Zero objects selected; send stopped. Please select some objects, or check that your filter can actually select something.");
                return(state);
            }

            var commitObj = new Base();

            var units = Units.GetUnitsFromString(ModelUnits).ToLower();

            commitObj["units"] = units;

            var conversionProgressDict = new ConcurrentDictionary <string, int>();

            conversionProgressDict["Conversion"] = 0;
            Execute.PostToUIThread(() => state.Progress.Maximum = state.SelectedObjectIds.Count());
            int convertedCount = 0;

            // grab elements from active model
            var objs = new List <Element>();

#if (OPENROADS || OPENRAIL)
            bool convertCivilObject = false;
            var  civObjs            = new List <NamedModelEntity>();

            if (civilElementKeys.Count(x => state.SelectedObjectIds.Contains(x)) > 0)
            {
                if (Control.InvokeRequired)
                {
                    civObjs = (List <NamedModelEntity>)Control.Invoke(new GetCivilObjectsDelegate(GetCivilObjects), new object[] { state });
                }
                else
                {
                    civObjs = GetCivilObjects(state);
                }

                objs = civObjs.Select(x => x.Element).ToList();
                convertCivilObject = true;
            }
            else
            {
                objs = state.SelectedObjectIds.Select(x => Model.FindElementById((ElementId)Convert.ToUInt64(x))).ToList();
            }
#else
            objs = state.SelectedObjectIds.Select(x => Model.FindElementById((ElementId)Convert.ToUInt64(x))).ToList();
#endif

#if (OPENBUILDINGS)
            if (ExportGridLines)
            {
                // grab grid lines
                ITFApplication appInst = new TFApplicationList();

                if (0 == appInst.GetProject(0, out ITFLoadableProjectList projList) && projList != null)
                {
                    ITFLoadableProject proj = projList.AsTFLoadableProject;
                    if (null == proj)
                    {
                        return(null);
                    }

                    ITFDrawingGrid drawingGrid = null;
                    if (Control.InvokeRequired)
                    {
                        Control.Invoke((Action)(() => { proj.GetDrawingGrid(false, 0, out drawingGrid); }));
                    }
                    else
                    {
                        proj.GetDrawingGrid(false, 0, out drawingGrid);
                    }

                    if (null == drawingGrid)
                    {
                        return(null);
                    }

                    Base converted;
                    if (Control.InvokeRequired)
                    {
                        converted = (Base)Control.Invoke(new SpeckleConversionDelegate(converter.ConvertToSpeckle), new object[] { drawingGrid });
                    }
                    else
                    {
                        converted = converter.ConvertToSpeckle(drawingGrid);
                    }

                    if (converted != null)
                    {
                        var containerName = "Grid Systems";

                        if (commitObj[$"@{containerName}"] == null)
                        {
                            commitObj[$"@{containerName}"] = new List <Base>();
                        }
                        ((List <Base>)commitObj[$"@{containerName}"]).Add(converted);

                        // not sure this makes much sense here
                        conversionProgressDict["Conversion"]++;
                        UpdateProgress(conversionProgressDict, state.Progress);

                        //gridLine.applicationId = ??;

                        convertedCount++;
                    }
                }
            }
#endif

            foreach (var obj in objs)
            {
                if (state.CancellationTokenSource.Token.IsCancellationRequested)
                {
                    return(null);
                }

                if (obj == null)
                {
                    state.Errors.Add(new Exception($"Failed to find local object."));
                    continue;
                }

                var objId   = obj.ElementId.ToString();
                var objType = obj.ElementType;

                if (!converter.CanConvertToSpeckle(obj))
                {
                    state.Errors.Add(new Exception($"Objects of type ${objType} are not supported"));
                    continue;
                }

                // convert obj
                // try catch to prevent memory access violation crash in case a conversion goes wrong
                Base   converted     = null;
                string containerName = string.Empty;
                try
                {
                    var levelCache = Model.GetFileLevelCache();
                    var objLevel   = levelCache.GetLevel(obj.LevelId);
                    var layerName  = "Unknown";
                    if (objLevel != null)
                    {
                        layerName = objLevel.Name;
                    }

#if (OPENROADS || OPENRAIL)
                    if (convertCivilObject)
                    {
                        var civilObj = civObjs[objs.IndexOf(obj)];
                        if (Control.InvokeRequired)
                        {
                            converted = (Base)Control.Invoke(new SpeckleConversionDelegate(converter.ConvertToSpeckle), new object[] { civilObj });
                            Control.Invoke((Action)(() => { containerName = civilObj.Name == "" ? "Unnamed" : civilObj.Name; }));
                        }
                        else
                        {
                            converted     = converter.ConvertToSpeckle(civilObj);
                            containerName = civilObj.Name == "" ? "Unnamed" : civilObj.Name;
                        }
                    }
                    else
                    {
                        if (Control.InvokeRequired)
                        {
                            converted = (Base)Control.Invoke(new SpeckleConversionDelegate(converter.ConvertToSpeckle), new object[] { obj });
                        }
                        else
                        {
                            converted = converter.ConvertToSpeckle(obj);
                        }
                        containerName = layerName;
                    }
#else
                    if (Control.InvokeRequired)
                    {
                        converted = (Base)Control.Invoke(new SpeckleConversionDelegate(converter.ConvertToSpeckle), new object[] { obj });
                    }
                    else
                    {
                        converted = converter.ConvertToSpeckle(obj);
                    }

                    containerName = layerName;
#endif
                    if (converted == null)
                    {
                        state.Errors.Add(new Exception($"Failed to convert object ${objId} of type ${objType}."));
                        continue;
                    }
                }
                catch
                {
                    state.Errors.Add(new Exception($"Failed to convert object {objId} of type {objType}."));
                    continue;
                }

                /* TODO: adding the feature data and properties per object
                 * foreach (var key in obj.ExtensionDictionary)
                 * {
                 * converted[key] = obj.ExtensionDictionary.GetUserString(key);
                 * }
                 */

                if (commitObj[$"@{containerName}"] == null)
                {
                    commitObj[$"@{containerName}"] = new List <Base>();
                }
                ((List <Base>)commitObj[$"@{containerName}"]).Add(converted);

                conversionProgressDict["Conversion"]++;
                UpdateProgress(conversionProgressDict, state.Progress);

                converted.applicationId = objId;

                convertedCount++;
            }

            Execute.PostToUIThread(() => state.Progress.Maximum = convertedCount);

            var transports = new List <ITransport>()
            {
                new ServerTransport(client.Account, streamId)
            };

            var commitObjId = await Operations.Send(
                commitObj,
                state.CancellationTokenSource.Token,
                transports,
                onProgressAction : dict => UpdateProgress(dict, state.Progress),
                onErrorAction : (err, exception) => { Exceptions.Add(exception); }
                );

            if (Exceptions.Count != 0)
            {
                RaiseNotification($"Failed to send: \n {Exceptions.Last().Message}");
                return(null);
            }

            if (convertedCount > 0)
            {
                var actualCommit = new CommitCreateInput
                {
                    streamId          = streamId,
                    objectId          = commitObjId,
                    branchName        = state.Branch.name,
                    message           = state.CommitMessage != null ? state.CommitMessage : $"Pushed {convertedCount} elements from {Utils.AppName}.",
                    sourceApplication = Utils.BentleyAppName
                };

                if (state.PreviousCommitId != null)
                {
                    actualCommit.parents = new List <string>()
                    {
                        state.PreviousCommitId
                    };
                }

                try
                {
                    var commitId = await client.CommitCreate(actualCommit);

                    await state.RefreshStream();

                    state.PreviousCommitId = commitId;

                    try
                    {
                        PersistAndUpdateStreamInFile(state);
                    }
                    catch (Exception e)
                    {
                    }
                    RaiseNotification($"{convertedCount} objects sent to {state.Stream.name}.");
                }
                catch (Exception e)
                {
                    Globals.Notify($"Failed to create commit.\n{e.Message}");
                    state.Errors.Add(e);
                }
            }
            else
            {
                Globals.Notify($"Did not create commit: no objects could be converted.");
            }

            return(state);
        }
Пример #4
0
        public override async Task <StreamState> ReceiveStream(StreamState state)
        {
            ConversionErrors.Clear();
            OperationErrors.Clear();

            var kit       = KitManager.GetDefaultKit();
            var converter = kit.LoadConverter(Utils.BentleyAppName);

            if (converter == null)
            {
                RaiseNotification($"Could not find any Kit!");
                state.CancellationTokenSource.Cancel();
                return(null);
            }

            if (Control.InvokeRequired)
            {
                Control.Invoke(new SetContextDelegate(converter.SetContextDocument), new object[] { Session.Instance });
            }
            else
            {
                converter.SetContextDocument(Session.Instance);
            }

            var previouslyReceiveObjects = state.ReceivedObjects;

            var transport = new ServerTransport(state.Client.Account, state.Stream.id);

            string referencedObject = state.Commit.referencedObject;

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(null);
            }

            //if "latest", always make sure we get the latest commit when the user clicks "receive"
            if (state.Commit.id == "latest")
            {
                var res = await state.Client.BranchGet(state.CancellationTokenSource.Token, state.Stream.id, state.Branch.name, 1);

                referencedObject = res.commits.items.FirstOrDefault().referencedObject;
            }

            var commit = state.Commit;

            var commitObject = await Operations.Receive(
                referencedObject,
                state.CancellationTokenSource.Token,
                transport,
                onProgressAction : dict => UpdateProgress(dict, state.Progress),
                onErrorAction : (s, e) =>
            {
                OperationErrors.Add(e);
                state.Errors.Add(e);
                state.CancellationTokenSource.Cancel();
            },
                onTotalChildrenCountKnown : count => Execute.PostToUIThread(() => state.Progress.Maximum = count)
                );

            if (OperationErrors.Count != 0)
            {
                Globals.Notify("Failed to get commit.");
                return(state);
            }

            if (state.CancellationTokenSource.Token.IsCancellationRequested)
            {
                return(null);
            }

            var flattenedObjects = FlattenCommitObject(commitObject, converter);

            List <ApplicationPlaceholderObject> newPlaceholderObjects;

            if (Control.InvokeRequired)
            {
                newPlaceholderObjects = (List <ApplicationPlaceholderObject>)Control.Invoke(new NativeConversionAndBakeDelegate(ConvertAndBakeReceivedObjects), new object[] { flattenedObjects, converter, state });
            }
            else
            {
                newPlaceholderObjects = ConvertAndBakeReceivedObjects(flattenedObjects, converter, state);
            }

            // receive was cancelled by user
            if (newPlaceholderObjects == null)
            {
                converter.Report.ConversionErrors.Add(new Exception("fatal error: receive cancelled by user"));
                return(null);
            }

            DeleteObjects(previouslyReceiveObjects, newPlaceholderObjects);

            state.ReceivedObjects = newPlaceholderObjects;

            state.Errors.AddRange(converter.Report.ConversionErrors);

            if (converter.Report.ConversionErrors.Any(x => x.Message.Contains("fatal error")))
            {
                // the commit is being rolled back
                return(null);
            }

            try
            {
                await state.RefreshStream();

                WriteStateToFile();
            }
            catch (Exception e)
            {
                WriteStateToFile();
                state.Errors.Add(e);
                Globals.Notify($"Receiving done, but failed to update stream from server.\n{e.Message}");
            }

            return(state);
        }
Пример #5
0
    /// <summary>
    /// Receives a stream and bakes into the existing revit file.
    /// </summary>
    /// <param name="state"></param>
    /// <returns></returns>
    public override async Task<StreamState> ReceiveStream(StreamState state)
    {
      ConversionErrors.Clear();
      OperationErrors.Clear();

      var kit = KitManager.GetDefaultKit();
      var converter = kit.LoadConverter(ConnectorRevitUtils.RevitAppName);
      converter.SetContextDocument(CurrentDoc.Document);
      var previouslyReceiveObjects = state.ReceivedObjects;

      var transport = new ServerTransport(state.Client.Account, state.Stream.id);

      string referencedObject = state.Commit.referencedObject;

      //if "latest", always make sure we get the latest commit when the user clicks "receive"
      if (state.Commit.id == "latest")
      {
        var res = await state.Client.BranchGet(state.CancellationTokenSource.Token, state.Stream.id, state.Branch.name, 1);
        referencedObject = res.commits.items.FirstOrDefault().referencedObject;
      }

      var commit = state.Commit;

      if (state.CancellationTokenSource.Token.IsCancellationRequested)
      {
        return null;
      }

      var commitObject = await Operations.Receive(
          referencedObject,
          state.CancellationTokenSource.Token,
          transport,
          onProgressAction: dict => UpdateProgress(dict, state.Progress),
          onErrorAction: (s, e) =>
          {
            OperationErrors.Add(e);
            state.Errors.Add(e);
            state.CancellationTokenSource.Cancel();
          },
          onTotalChildrenCountKnown: count => Execute.PostToUIThread(() => state.Progress.Maximum = count)
          );

      if (OperationErrors.Count != 0)
      {
        Globals.Notify("Failed to get commit.");
        return state;
      }

      if (state.CancellationTokenSource.Token.IsCancellationRequested)
      {
        return null;
      }

      UpdateProgress(new ConcurrentDictionary<string, int>() { ["Converting"] = 1 }, state.Progress);

      // Bake the new ones.
      Queue.Add(() =>
      {
        using (var t = new Transaction(CurrentDoc.Document, $"Baking stream {state.Stream.name}"))
        {
          t.Start();

          var flattenedObjects = FlattenCommitObject(commitObject, converter);
          // needs to be set for editing to work 
          converter.SetPreviousContextObjects(previouslyReceiveObjects);
          // needs to be set for openings in floors and roofs to work
          converter.SetContextObjects(flattenedObjects.Select(x => new ApplicationPlaceholderObject { applicationId = x.applicationId, NativeObject = x }).ToList());
          var newPlaceholderObjects = ConvertReceivedObjects(flattenedObjects, converter, state);

          DeleteObjects(previouslyReceiveObjects, newPlaceholderObjects);

          state.ReceivedObjects = newPlaceholderObjects;
          state.Errors.AddRange(converter.ConversionErrors.Select(e => new Exception($"{e.message}: {e.details}")));

          t.Commit();
        }
      });

      Executor.Raise();

      try
      {
        var updatedStream = await state.Client.StreamGet(state.Stream.id);
        state.Branches = updatedStream.branches.items;
        state.Stream.name = updatedStream.name;
        state.Stream.description = updatedStream.description;

        WriteStateToFile();
      }
      catch (Exception e)
      {
        WriteStateToFile();
        state.Errors.Add(e);
        Globals.Notify($"Receiving done, but failed to update stream from server.\n{e.Message}");
      }

      return state;
    }
Пример #6
0
    /// <summary>
    /// Converts the Revit elements that have been added to the stream by the user, sends them to
    /// the Server and the local DB, and creates a commit with the objects.
    /// </summary>
    /// <param name="state">StreamState passed by the UI</param>
    public override async Task<StreamState> SendStream(StreamState state)
    {
      ConversionErrors.Clear();
      OperationErrors.Clear();

      var kit = KitManager.GetDefaultKit();
      var converter = kit.LoadConverter(ConnectorRevitUtils.RevitAppName);
      converter.SetContextDocument(CurrentDoc.Document);

      var streamId = state.Stream.id;
      var client = state.Client;

      var convertedObjects = new List<Base>();

      if (state.Filter != null)
      {
        state.Objects = GetSelectionFilterObjects(state.Filter);
      }

      if (state.Objects.Count == 0)
      {
        state.Errors.Add(new Exception("There are zero objects to send. Please create a filter, or set some via selection."));
        return state;
      }

      var commitObject = new Base();

      var conversionProgressDict = new ConcurrentDictionary<string, int>();
      conversionProgressDict["Conversion"] = 0;
      Execute.PostToUIThread(() => state.Progress.Maximum = state.Objects.Count());
      var convertedCount = 0;

      var placeholders = new List<Base>();

      converter.SetContextObjects(state.Objects.Select(obj => new ApplicationPlaceholderObject { applicationId = obj.applicationId }).ToList());
      foreach (var obj in state.Objects)
      {
        try
        {
          RevitElement revitElement = null;
          if (obj.applicationId != null)
          {
            revitElement = CurrentDoc.Document.GetElement(obj.applicationId);
          }

          if (revitElement == null)
          {
            continue;
          }

          if (!converter.CanConvertToSpeckle(revitElement))
          {
            state.Errors.Add(new Exception($"Skipping {revitElement.GetType()}, not supported"));
            continue;
          }



          var conversionResult = converter.ConvertToSpeckle(revitElement);

          conversionProgressDict["Conversion"]++;
          UpdateProgress(conversionProgressDict, state.Progress);

          placeholders.Add(new ApplicationPlaceholderObject { applicationId = obj.applicationId, ApplicationGeneratedId = obj.applicationId });

          convertedCount++;



          //hosted elements will be returned as `null` by the ConvertToSpeckle method 
          //since they are handled when converting their parents
          if (conversionResult != null)
          {
            var category = $"@{revitElement.Category.Name}";
            if (commitObject[category] == null)
            {
              commitObject[category] = new List<Base>();
            }
             ((List<Base>)commitObject[category]).Add(conversionResult);
          }

        }
        catch (Exception e)
        {
          state.Errors.Add(e);
        }

        //var level = (Level) CurrentDoc.Document.GetElement(revitElement.LevelId);

        //if(commitObject[$"@{level.Name}"] == null)
        //{
        //  commitObject[$"@{level.Name}"] = new Base
        //  {
        //    ["@objects"] = new List<Base>(),
        //    ["elevation"] = level.Elevation, // TODO Cast! 
        //  };
        //}

      }

      if (converter.ConversionErrors.Count != 0)
      {
        // TODO: Get rid of the custom Error class. It's not needed.
        ConversionErrors.AddRange(converter.ConversionErrors.Select(x => new Exception($"{x.Message}\n{x.details}")));
        state.Errors.AddRange(converter.ConversionErrors.Select(x => new Exception($"{x.Message}\n{x.details}")));
      }

      if (convertedCount == 0)
      {
        Globals.Notify("Failed to convert any objects. Push aborted.");
        return state;
      }

      Execute.PostToUIThread(() => state.Progress.Maximum = (int)commitObject.GetTotalChildrenCount());

      if (state.CancellationTokenSource.Token.IsCancellationRequested)
      {
        return state;
      }

      var transports = new List<ITransport>() { new ServerTransport(client.Account, streamId) };

      var objectId = await Operations.Send(
        @object: commitObject,
        cancellationToken: state.CancellationTokenSource.Token,
        transports: transports,
        onProgressAction: dict => UpdateProgress(dict, state.Progress),
        onErrorAction: (s, e) =>
        {
          OperationErrors.Add(e); // TODO!
          state.Errors.Add(e);
          state.CancellationTokenSource.Cancel();
        }
        );

      if (OperationErrors.Count != 0)
      {
        Globals.Notify("Failed to send.");
        state.Errors.AddRange(OperationErrors);
        return state;
      }

      if (state.CancellationTokenSource.Token.IsCancellationRequested)
      {
        return null;
      }

      var actualCommit = new CommitCreateInput()
      {
        streamId = streamId,
        objectId = objectId,
        branchName = state.Branch.name,
        message = state.CommitMessage != null ? state.CommitMessage : $"Sent {convertedCount} objects from {ConnectorRevitUtils.RevitAppName}."
      };

      if (state.PreviousCommitId != null) { actualCommit.previousCommitIds = new List<string>() { state.PreviousCommitId }; }

      try
      {
        var res = await client.CommitCreate(actualCommit);

        var updatedStream = await client.StreamGet(streamId);
        state.Branches = updatedStream.branches.items;
        state.Stream.name = updatedStream.name;
        state.Stream.description = updatedStream.description;

        WriteStateToFile();
        RaiseNotification($"{convertedCount} objects sent to Speckle 🚀");
      }
      catch (Exception e)
      {
        state.Errors.Add(e);
        Globals.Notify($"Failed to create commit.\n{e.Message}");
      }

      return state;
    }