protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
base.OnActionExecuting(filterContext);
// Get the instanceId to identify the current page flow.
var instanceId = GetInstanceIdValue();
if (instanceId != null)
{
// Get the current state for the identified page flow.
Pageflow = _pageflowEngine.GetPageflow <TPageflow>(instanceId.Value);
}
// If no state then start a page flow.
if (Pageflow == null)
{
Pageflow = CreatePageflow();
_pageflowEngine.StartPageflow(Pageflow);
}
// If the user is not at the right point in the flow then reset them.
var currentStep = CurrentStep;
if (filterContext.ActionDescriptor.ActionName != currentStep.Name)
{
var step = Pageflow.GetStep(filterContext.ActionDescriptor.ActionName);
if (step != null && step.CanBeMovedTo)
{
_pageflowEngine.MoveToStep(Pageflow, filterContext.ActionDescriptor.ActionName);
}
else
{
// Propagate any query string.
var routeUrl = GetRoute(currentStep).RouteReference.GenerateUrl(new { instanceId = Pageflow.Id }).AsNonReadOnly();
var clientUrl = HttpContext.GetClientUrl().AsNonReadOnly();
if (clientUrl.QueryString != null)
{
clientUrl.QueryString.Remove("instanceId");
if (clientUrl.QueryString.Count > 0)
{
routeUrl.QueryString.Add(clientUrl.QueryString);
}
}
filterContext.Result = RedirectToUrl(routeUrl);
}
}
}
protected virtual ActionResult Step(string name)
{
_pageflowEngine.MoveToStep(Pageflow, name);
return(RedirectToRoute(GetRoute(Pageflow.GetStep(name)).RouteReference, new { instanceId = Pageflow.Id }));
}