private static IList <ControllerActionDescriptor> CreateActionDescriptors(
ApplicationModel application,
ControllerModel controller,
ActionModel action)
{
var defaultControllerConstraints = Enumerable.Empty <IActionConstraintMetadata>();
var defaultControllerEndpointMetadata = Enumerable.Empty <object>();
if (controller.Selectors.Count > 0)
{
defaultControllerConstraints = controller.Selectors[0].ActionConstraints
.Where(constraint => !(constraint is IRouteTemplateProvider));
defaultControllerEndpointMetadata = controller.Selectors[0].EndpointMetadata;
}
var actionDescriptors = new List <ControllerActionDescriptor>();
foreach (var result in ActionAttributeRouteModel.GetAttributeRoutes(action))
{
var actionSelector = result.actionSelector;
var controllerSelector = result.controllerSelector;
var actionDescriptor = CreateActionDescriptor(action, result.route);
actionDescriptors.Add(actionDescriptor);
AddActionFilters(actionDescriptor, action.Filters, controller.Filters, application.Filters);
var controllerConstraints = defaultControllerConstraints;
if (controllerSelector?.AttributeRouteModel?.Attribute is IActionConstraintMetadata actionConstraint)
{
// Use the attribute route as a constraint if the controller selector participated in creating this route.
controllerConstraints = controllerConstraints.Concat(new[] { actionConstraint });
}
AddActionConstraints(actionDescriptor, actionSelector, controllerConstraints);
// Metadata for the action is more significant so order it before the controller metadata
var actionDescriptorMetadata = actionSelector.EndpointMetadata.ToList();
actionDescriptorMetadata.AddRange(defaultControllerEndpointMetadata);
actionDescriptor.EndpointMetadata = actionDescriptorMetadata;
}
return(actionDescriptors);
}
private bool ParameterExistsInAnyRoute(ActionModel actionModel, string parameterName)
{
foreach (var(route, _, _) in ActionAttributeRouteModel.GetAttributeRoutes(actionModel))
{
if (route == null)
{
continue;
}
var parsedTemplate = TemplateParser.Parse(route.Template);
if (parsedTemplate.GetParameter(parameterName) != null)
{
return(true);
}
}
return(false);
}
private bool ParameterExistsInAllRoutes(ActionModel actionModel, string parameterName)
{
var parameterExistsInSomeRoute = false;
foreach (var(route, _, _) in ActionAttributeRouteModel.GetAttributeRoutes(actionModel))
{
if (route == null)
{
continue;
}
var parsedTemplate = TemplateParser.Parse(route.Template);
if (parsedTemplate.GetParameter(parameterName) == null)
{
return(false);
}
// Ensure at least one route exists.
parameterExistsInSomeRoute = true;
}
return(parameterExistsInSomeRoute);
}