vgquotes/Src/VideoGameQuotes.Web/Configuration/DeleteSearchIndexCallHandler.cs

using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.InterceptionExtension;
using Portoa.Search;
using VideoGameQuotes.Api;

namespace VideoGameQuotes.Web.Configuration {
	/// <summary>
	/// Call handler that deletes the search index whenever a quote is deleted
	/// </summary>
	public class DeleteSearchIndexCallHandler : ICallHandler {
		private readonly IUnityContainer container;

		public DeleteSearchIndexCallHandler(IUnityContainer container) {
			this.container = container;
		}

		public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext) {
			var quoteId = (int)input.Arguments[0];
			var returnValue = getNext()(input, getNext);
			if (returnValue.Exception != null) {
				return returnValue;
			}

			container.Resolve<ISearchIndexBuilder<Quote, int>>().DeleteIndex(new Quote { Id = quoteId });

			return returnValue;
		}

		public int Order { get; set; }
	}
}