public ActivityResult ProcessWorkFlow(FuzeActivity container, FuzeActivity currentActivity, ActivityInput input)
{
Contracts.ActivityResult activityResult = null;
container.CurrentActivityID = currentActivity.ActivityID;
// map all input to the activity for activity execution.
SetInputMappingsFromWorkFlow(container, currentActivity);
// execute the workflow
currentActivity.Execute();
// map if the item has any output mappings.
SetOutputMappingsToWorkFlow(container, currentActivity);
// check the activity type
if (currentActivity.ActivityType == "FORM")
{
// map all output to the activity result.
activityResult = new ActivityResult();
activityResult.Results = new Dictionary<string, object>();
// activityResult.Results.Add("FormResult", currentActivity.GetType().GetProperty("ActivityResult").GetValue(currentActivity, null));
MapOutPutMappingToActivityResult(container, currentActivity, activityResult);
activityResult.ValidationResults = currentActivity.ValidationErros.ToDictionary(c => c.ValidationKey, x => x.ValidationResult);
// check for persistance
PersistActivity(container, input);
activityResult.WorkflowInstanceID = input.WorkflowInstanceID;
if (currentActivity.OutComes == null || currentActivity.OutComes.Count() == 0)
{
RemoveActivityInstance(input.WorkflowInstanceID);
}
return activityResult;
}
else if (currentActivity.ActivityType == "CUSTOM")
{
if (currentActivity.OutComes == null || currentActivity.OutComes.Count() == 0)
{
RemoveActivityInstance(input.WorkflowInstanceID);
return activityResult;
}
container.NextActivityID = currentActivity.OutComes.First().Activity.ActivityID;
return ProcessWorkFlow(container, currentActivity.OutComes.First().Activity, input);
}
return activityResult;
}
private void SetOutputMappingsToWorkFlow(FuzeActivity container, FuzeActivity currentActivity)
{
if (currentActivity.OutputMappings != null)
{
foreach (Mapping mapping in currentActivity.OutputMappings)
{
PropertyInfo propertyInfo = container.GetType().GetProperty(mapping.MappingArgument);
propertyInfo.SetValue(container, Convert.ChangeType(currentActivity.GetType().GetProperty(mapping.InputArgument).GetValue(currentActivity, null), propertyInfo.PropertyType), null);
}
}
}
private void MapOutPutMappingToActivityResult(FuzeActivity container, FuzeActivity currentActivity, Contracts.ActivityResult activityResult)
{
if (currentActivity.OutputMappings != null)
{
foreach (Mapping mapping in currentActivity.OutputMappings)
{
PropertyInfo propertyInfo = container.GetType().GetProperty(mapping.MappingArgument);
activityResult.Results.Add(mapping.MappingArgument, propertyInfo.GetValue(container));
}
}
}
private void PersistActivity(FuzeActivity container, ActivityInput input)
{
bool isUpdate = false;
if (input.WorkflowInstanceID == Guid.Empty)
{
input.WorkflowInstanceID = Guid.NewGuid();
}
else
{
isUpdate = true;
}
StringBuilder instanceXaml = new StringBuilder();
using (StringWriter writer = new StringWriter(instanceXaml))
{
XamlServices.Save(writer, container);
}
var workflowInstance = new FuzeWorkflowInstance()
{
WorkflowInstanceID = input.WorkflowInstanceID,
WorkFlow = instanceXaml.ToString()
};
if (isUpdate)
{
RemoveActivityInstance(workflowInstance.WorkflowInstanceID);
}
dbContext.FuzeWorkflowInstances.Add(workflowInstance);
dbContext.SaveChanges();
}
private void MapInputParameters(Contracts.ActivityInput input, FuzeActivity activity)
{
if (input.Inputs != null)
{
// get all input properties of the workflow.
var properties = activity.GetType().GetProperties()
.Where(prop => prop.IsDefined(typeof(InputAttribute), false));
foreach (var property in properties)
{
if (input.Inputs[property.Name] != null)
{
property.SetValue(activity, Convert.ChangeType(input.Inputs[property.Name], property.PropertyType), null);
}
}
}
}