public BreadcrumbHelper(
IPageDataContextRetriever pageDataContextRetriever,
IPageUrlRetriever pageUrlRetriever,
IBreadcrumbsRenderer breadcrumbsRenderer,
IPageRetriever pageRetriever,
BreadcrumbsWidgetProperties breadcrumbsWidgetProperties)
{
this.pageDataContextRetriever = pageDataContextRetriever;
this.pageUrlRetriever = pageUrlRetriever;
this.breadcrumbsRenderer = breadcrumbsRenderer;
this.pageRetriever = pageRetriever;
Properties = breadcrumbsWidgetProperties;
}
private IHtmlContent GetBreadcrumbContent(BreadcrumbsWidgetProperties props)
{
if (props is null)
{
throw new ArgumentNullException(nameof(props));
}
var current = pageDataContextRetriever.Retrieve <TreeNode>().Page;
var hierarchy = CacheHelper.Cache((cs) => {
ICollection <string> cacheDependencies = new List <string>();
var list = GetHierarchy(current, props.ShowSiteLink, props.ShowContainers, ref cacheDependencies);
cs.CacheDependency = CacheHelper.GetCacheDependency(cacheDependencies);
return(list);
}, new CacheSettings(120, GetCacheKey(current.DocumentID, props.ShowSiteLink, props.ShowContainers)));
var header = breadcrumbsRenderer.RenderOpeningTag(props.ContainerClass);
var footer = breadcrumbsRenderer.RenderClosingTag();
var sb = new StringBuilder();
foreach (BreadcrumbItem bci in hierarchy)
{
sb.Append(breadcrumbsRenderer.RenderSeparator(props.Separator));
if (bci.IsCurrentPage)
{
sb.Append(breadcrumbsRenderer.RenderCurrentPage(bci, props.BreadcrumbItemClass, props.CurrentPageClass));
}
else if (bci.IsSiteLink)
{
sb.Append(breadcrumbsRenderer.RenderSiteLink(bci, props.BreadcrumbItemClass));
}
else if (string.IsNullOrEmpty(bci.Url))
{
sb.Append(breadcrumbsRenderer.RenderItemWithoutLink(bci, props.BreadcrumbItemClass));
}
else
{
sb.Append(breadcrumbsRenderer.RenderItem(bci, props.BreadcrumbItemClass));
}
}
// Remove first separator
var body = TrimSeparator(sb.ToString().Trim(), props.Separator);
return(new HtmlString($"{header}{body}{footer}"));
}
public static void AddBreadcrumbs(
this IServiceCollection services,
Action <BreadcrumbsWidgetProperties> configure = null,
IBreadcrumbsRenderer renderer = null)
{
services.AddSingleton <BreadcrumbHelper>();
// Register renderer
if (renderer is null)
{
renderer = new DefaultBreadcrumbsRenderer();
}
services.AddSingleton(renderer);
// Register widget properties
var props = new BreadcrumbsWidgetProperties().SetDefaults();
if (configure is object)
{
configure(props);
}
services.AddSingleton(props);
}
/// <summary>
/// Returns breadrumb HTML using the manually provided BreadcrumbsWidgetProperties
/// </summary>
/// <param name="props"></param>
/// <returns></returns>
public IHtmlContent GetBreadcrumbs(BreadcrumbsWidgetProperties props)
{
return(GetBreadcrumbContent(props));
}