//-------------------- COMMON LINK PROPERTY GENERATION METHODS ----------------------
public ControllerActionLink BuildActionUrlLink <TController>(Expression <Action <TController, TResource> > action)
where TController : ControllerBase
{
if (action == null)
{
throw new ArgumentNullException(nameof(action),
"Controller Action selector cannot be null.");
}
var resourceLink = new ControllerActionLink();
var actionSelector = new ControllerActionRouteSelector <TController, TResource>(resourceLink, action);
actionSelector.SetRouteInfo();
return(resourceLink);
}
// Called for action link containing information based on an expression, specified at compile time, selecting a
// controller's action method. The expression also specifies which resource properties should be used for
// the action's route parameters.
private Link SetLinkUrl(ResourceContext context, ControllerActionLink resourceLink)
{
string controllerName = resourceLink.Controller.Replace("Controller", string.Empty);
var routeValues = GetResourceRouteValues(context, resourceLink);
var link = new Link
{
// Delegate to ASP.NET Core to get the URL corresponding to the route-values.
Href = context.UrlHelper.Action(resourceLink.Action, controllerName, routeValues),
Templated = false,
Methods = resourceLink.Methods.ToArray()
};
UpdateLinkDescriptorsAndResource(context, resourceLink, link);
return(link);
}
// For each controller action argument execute the cached expression on the resource
// to get the corresponding resource property value for that route parameter.
private static Dictionary <string, object> GetResourceRouteValues(ResourceContext context, ControllerActionLink resourceLink)
{
var modelRouteValues = new Dictionary <string, object>(resourceLink.RouteParameters.Count);
foreach (RouteParameter routeParam in resourceLink.RouteParameters)
{
modelRouteValues[routeParam.ActionParamName] = routeParam.GetPropValue(context.Resource);
}
return(modelRouteValues);
}
