/// <summary>
/// Builds and configures the current page reference
/// </summary>
private void Build()
{
var descriptor = actionContextAccessor.ActionContext.ActionDescriptor as ControllerActionDescriptor;
MethodInfo currentAction = descriptor.MethodInfo;
//find the current page in the page tree provider
CurrentPageTree = FindPageTree(pageTreeProvider.Root, currentAction);
var path = new List <PageInfo>();
PageTree pgt = CurrentPageTree;
while (pgt != null)
{
//configure the current page with strings from attributes
ApplyAttributes(pgt);
//set the path collection for building menus
path.Add(pgt.Page);
pgt = pgt.Parent;
}
path.Reverse();
CurrentPagePath = path.AsReadOnly();
}
/// <summary>
/// DFS tree search
/// </summary>
/// <param name="tree">Page tree</param>
/// <param name="action">Action to search</param>
/// <returns>Node element</returns>
private PageTree FindPageTree(PageTree tree, MethodInfo action)
{
if (tree.Page.Action.Equals(action))
{
return(tree);
}
foreach (PageTree child in tree.Children)
{
PageTree foundChild = FindPageTree(child, action);
if (foundChild != null)
{
return(foundChild);
}
}
return(null);
}
/// <summary>
/// Configures the localizable strings to the <see cref="PageInfo"/> in the tree path
/// created from the current request. Uses <see cref="DisplayAttribute"/> and/or the
/// <see cref="PageMetadataAttribute"/>.
/// </summary>
/// <param name="currentPageTree">Current page tree to apply</param>
private void ApplyAttributes(PageTree currentPageTree)
{
PageInfo currentPage = currentPageTree.Page;
MethodInfo pageAction = currentPage.Action;
//detect and apply the display attribute
DisplayAttribute displayAttribute = pageAction.GetCustomAttribute <DisplayAttribute>();
if (displayAttribute != null)
{
if (displayAttribute.ResourceType != null)
{
var rs = new ResourceManager(displayAttribute.ResourceType);
currentPage.Caption = rs.GetString(displayAttribute.Name);
}
else
{
currentPage.Caption = displayAttribute.Name;
}
}
//detect and apply the page metadata attribute
PageMetadataAttribute pageMetadataAttribute = pageAction.GetCustomAttribute <PageMetadataAttribute>();
if (pageMetadataAttribute != null)
{
if (pageMetadataAttribute.ResourceType != null)
{
var rs = new ResourceManager(pageMetadataAttribute.ResourceType);
if (!String.IsNullOrEmpty(pageMetadataAttribute.Caption))
{
currentPage.Caption = rs.GetString(pageMetadataAttribute.Caption);
}
if (!String.IsNullOrEmpty(pageMetadataAttribute.Header))
{
currentPage.Header = rs.GetString(pageMetadataAttribute.Header);
}
}
else
{
currentPage.Caption = pageMetadataAttribute.Caption;
currentPage.Header = pageMetadataAttribute.Header;
}
currentPage.RenderHeader = pageMetadataAttribute.RenderHeader;
currentPage.RenderCaption = pageMetadataAttribute.RenderCaption;
}
//translate template variables from route data
if (!String.IsNullOrEmpty(currentPage.Caption))
{
currentPage.Caption = TranslateParameters(currentPage.Caption);
}
if (!String.IsNullOrEmpty(currentPage.Header))
{
currentPage.Header = TranslateParameters(currentPage.Header);
}
var urlHelper = new UrlHelper(actionContextAccessor.ActionContext);
//build url for the items in the page tree using the existing route values
var routeValues = new Dictionary <string, object>();
foreach (KeyValuePair <string, object> routeValue in actionContextAccessor.ActionContext.RouteData.Values)
{
//detecting a variable template with "{" should be enough
if (currentPage.UrlTemplate.Contains("{" + routeValue.Key))
{
routeValues.Add(routeValue.Key, routeValue.Value);
}
}
currentPage.CurrentUrl = urlHelper.Action(new UrlActionContext()
{
Action = currentPage.Action.Name,
Controller = currentPage.Action.DeclaringType.Name.Replace("controller", "", StringComparison.InvariantCultureIgnoreCase),
Values = routeValues
});
}