/// <summary>
/// Gets a content element by its name or create a new one.
/// </summary>
/// <typeparam name="TElement">The expected type of the content element.</typeparam>
/// <typeparam name="name">The name of the content element.</typeparam>
/// <returns>The content element instance or a new one if it doesn't exist.</returns>
public static TElement GetOrCreate <TElement>(this ContentElement contentElement, string name) where TElement : ContentElement, new()
{
var existing = contentElement.Get <TElement>(name);
if (existing == null)
{
existing = new TElement();
existing.ContentItem = contentElement.ContentItem;
contentElement.Data[name] = existing.Data;
return(existing);
}
return(existing);
}
/// <summary>
/// Gets a content element by its name.
/// </summary>
/// <param name="contentElement">The <see cref="ContentElement"/>.</param>
/// <param name="name">The name of the content element.</param>
/// <typeparam name="TElement">The expected type of the content element.</typeparam>
/// <returns>The content element instance or <code>null</code> if it doesn't exist.</returns>
public static TElement Get <TElement>(this ContentElement contentElement, string name) where TElement : ContentElement
{
var result = contentElement.Get(typeof(TElement), name);
if (result == null)
{
return(null);
}
if (result is TElement te)
{
return(te);
}
throw new InvalidCastException($"Failed casting content to '{typeof(TElement).Name}', check you have registered your content part with AddContentPart?");
}
/// <summary>
/// Gets a content element by its name.
/// </summary>
/// <typeparam name="TElement">The expected type of the content element.</typeparam>
/// <typeparam name="name">The name of the content element.</typeparam>
/// <returns>The content element instance or <code>null</code> if it doesn't exist.</returns>
public static TElement Get <TElement>(this ContentElement contentElement, string name) where TElement : ContentElement
{
return((TElement)contentElement.Get(typeof(TElement), name));
}
