/// <summary>
/// Adds a sequence of <see cref="Breadcrumb"/> objects to the specified <paramref name="viewData"/>.
/// </summary>
/// <typeparam name="T">The type of the model to retrieve breadcrumb labels from.</typeparam>
/// <param name="viewData">The <see cref="ViewDataDictionary"/> to extend.</param>
/// <param name="controller">The controller to resolve all public methods with <see cref="IActionResult"/> as return type from.</param>
/// <param name="model">The model to retrieve custom breadcrumb labels from.</param>
/// <param name="initializer">The function delegate that will initialize labels from the spcified <paramref name="model"/>.</param>
public static void AddBreadcrumbs <T>(this ViewDataDictionary viewData, Controller controller, T model, Func <T, IEnumerable <string> > initializer)
{
var list = new List <Breadcrumb>();
var ct = controller.GetType();
var actions = ct.GetMethods(ReflectionUtility.BindingInstancePublic).Where(mi => mi.ReturnType == typeof(IActionResult)).ToList();
var labelInvokers = initializer(model).ToList();
for (int i = 0; i < actions.Count; i++)
{
var bc = new Breadcrumb()
{
ActionName = actions[i].Name,
ControllerName = controller.RouteData.Values["controller"] as string,
Label = labelInvokers[i]
};
list.Add(bc);
}
viewData.AddOrUpdate(BreadcrumbKey, list);
}
