BExIS.Web.Shell.Areas.DCM.Controllers.FormController.AddComplexUsage C# (CSharp) Method

        public ActionResult AddComplexUsage(int parentStepId, int number)
        {
            TaskManager = (CreateTaskmanager)Session["CreateDatasetTaskmanager"];

            //TaskManager.SetCurrent(TaskManager.Get(parentStepId));

            long metadataStructureId = Convert.ToInt64(TaskManager.Bus[CreateTaskmanager.METADATASTRUCTURE_ID]);
            int position = number + 1;

            StepModelHelper parentStepModelHelper = GetStepModelhelper(parentStepId);
            BaseUsage u = LoadUsage(parentStepModelHelper.Usage);

            //Create new step
            StepInfo newStep = new StepInfo(UsageHelper.GetNameOfType(u))
            {
                Id = TaskManager.GenerateStepId(),
                parentTitle = parentStepModelHelper.Model.StepInfo.title,
                Parent = parentStepModelHelper.Model.StepInfo,
                IsInstanze = true,
            };

            string xPath = parentStepModelHelper.XPath + "//" + UsageHelper.GetNameOfType(u) + "[" + position + "]";

            // add to parent stepId
            parentStepModelHelper.Model.StepInfo.Children.Add(newStep);
            TaskManager.StepInfos.Add(newStep);

            // create Model
            AbstractMetadataStepModel model = null;

            if (u is MetadataAttributeUsage || u is MetadataNestedAttributeUsage)
            {
                model = MetadataCompoundAttributeModel.ConvertToModel(parentStepModelHelper.Usage, number);
                model.Number = position;

                ((MetadataCompoundAttributeModel)model).ConvertMetadataAttributeModels(LoadUsage(parentStepModelHelper.Usage), metadataStructureId, newStep.Id);

                //Update metadata xml
                //add step to metadataxml
                AddCompoundAttributeToXml(model.Source, model.Number, parentStepModelHelper.XPath);
            }

            if (u is MetadataPackageUsage)
            {
                model = MetadataPackageModel.Convert(parentStepModelHelper.Usage, number);
                model.Number = position;
                ((MetadataPackageModel)model).ConvertMetadataAttributeModels(LoadUsage(parentStepModelHelper.Usage), metadataStructureId, newStep.Id);

                //Update metadata xml
                //add step to metadataxml
                AddPackageToXml(model.Source, model.Number, parentStepModelHelper.XPath);
            }

            // create StepModel for new step
            StepModelHelper newStepModelhelper = new StepModelHelper
            {
                StepId = newStep.Id,
                Usage = parentStepModelHelper.Usage,
                Number = position,
                Model = model,
                XPath = xPath,
                Level = parentStepModelHelper.Level+1,
                Activated = true
            };

            newStep.Children = GetChildrenSteps(u, newStep, xPath, newStepModelhelper);
            newStepModelhelper.Model.StepInfo = newStep;
            newStepModelhelper = getChildModelsHelper(newStepModelhelper);

            // add stepmodel to dictionary
            AddStepModelhelper(newStepModelhelper);

            //add stepModel to parentStepModel
            parentStepModelHelper.Childrens.Insert(newStepModelhelper.Number - 1, newStepModelhelper);

            //update childrens of the parent step based on number
            for (int i = 0; i < parentStepModelHelper.Childrens.Count; i++)
            {
                StepModelHelper smh = parentStepModelHelper.Childrens.ElementAt(i);
                smh.Number = i + 1;
            }

            // add step to parent and update title of steps
            //parentStepModelHelper.Model.StepInfo.Children.Insert(newStepModelhelper.Number - 1, newStep);
            for (int i = 0; i < parentStepModelHelper.Model.StepInfo.Children.Count; i++)
            {
                StepInfo si = parentStepModelHelper.Model.StepInfo.Children.ElementAt(i);
                si.title = (i + 1).ToString();
            }

            //// load InstanzB for parentmodel
            parentStepModelHelper.Model.ConvertInstance((XDocument)(TaskManager.Bus[CreateTaskmanager.METADATA_XML]), parentStepModelHelper.XPath);

            if (u is MetadataAttributeUsage || u is MetadataNestedAttributeUsage)
            {
                return PartialView("_metadataCompoundAttributeView", parentStepModelHelper);
            }

            if (u is MetadataPackageUsage)
            {
                return PartialView("_metadataCompoundAttributeView", parentStepModelHelper);
            }

            return null;
        }