WorkflowController

gistfile1.cs

    public abstract class WorkflowController : BaseController
    {
        private string _workflowReference;
        private readonly string _modelNamespace;
        private readonly string _modelAssembly;
        private IWorkflowKeyStore _workflowKeyStore;
        private IWorkflowInvokerFactory _invokerFactory;

        protected WorkflowController(string workflowReference, string modelNamespace, string modelAssembly, IWorkflowKeyStore workflowKeyStore, IWorkflowInvokerFactory workflowInvokerFactory)
        {
            _workflowReference = workflowReference;
            _modelNamespace = modelNamespace;
            _modelAssembly = modelAssembly;

            _workflowKeyStore = workflowKeyStore;
            _invokerFactory = workflowInvokerFactory;
        }

        public string WorkflowReference
        {
            get { return _workflowReference; }
        }

        public IWorkflowInvokerFactory InvokerFactory
        {
            get { return _invokerFactory; }
        }

        public IWorkflowKeyStore WorkflowKeyStore
        {
            get { return _workflowKeyStore; }
        }

        private IWorkflowInvoker _invoker;
        public IWorkflowInvoker Invoker
        {
            get
            {
                if (_invoker == null) 
                    _invoker = InvokerFactory.CreateWorkflowInvoker();

                return _invoker;
            }
        }

        private Guid? _currentWorkflowKey;
        public Guid? CurrentWorkflowKey
        {
            get {

                if (_currentWorkflowKey == null)
                    _currentWorkflowKey = WorkflowKeyStore.GetWorkflowKey(WorkflowReference);

                return _currentWorkflowKey;
            }
        }
        
        public void SetWorkflowKey(Guid workflowKey)
        {
            WorkflowKeyStore.StoreWorkflowKey(WorkflowReference, workflowKey);
        }

        private object FindModel(string name)
        {
            var modelFullNamespace = string.Format("{0}.{1},{2}", _modelNamespace, name, _modelAssembly);

            var modelType = Type.GetType(modelFullNamespace);

            if (modelType != null)
                return Activator.CreateInstance(modelType);

            return null;
        }

        public ViewResult RedirectToStep(string step, dynamic modelData)
        {
            var model = FindModel(step);

            if (model == null)
                return View(step);

            ValueBinder.ConvertPropertyValues(model, modelData);
            return View(step, model);

        }

        public bool ValidateModel(string modelName, FormCollection collection)
        {
            if (!String.IsNullOrEmpty(modelName))
            {
                dynamic viewmodel = FindModel(modelName);

                TryUpdateModel(viewmodel, collection);
                return ModelState.IsValid;
            }

            return true;
        }
    }