1 files changed, 47 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.ApplicationBlock/CustomExtensions/UIRequestAtRelyingPartyFactory.cs b/src/DotNetOpenAuth.ApplicationBlock/CustomExtensions/UIRequestAtRelyingPartyFactory.cs
new file mode 100644
index 0000000..afa242e
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+++ b/src/DotNetOpenAuth.ApplicationBlock/CustomExtensions/UIRequestAtRelyingPartyFactory.cs
@@ -0,0 +1,47 @@
+//-----------------------------------------------------------------------
+// <copyright file="UIRequestAtRelyingPartyFactory.cs" company="Outercurve Foundation">
+//     Copyright (c) Outercurve Foundation. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.ApplicationBlock.CustomExtensions {
+	using System.Collections.Generic;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OpenId.ChannelElements;
+	using DotNetOpenAuth.OpenId.Extensions.UI;
+
+	/// <summary>
+	/// An extension factory that allows the <see cref="UIRequest"/> extension to be received by the relying party.
+	/// </summary>
+	/// <remarks>
+	/// Typically UIRequest is only received by the Provider.  But Google mirrors back this data to the relying party
+	/// if our web user is already logged into Google.
+	/// See the OpenIdRelyingPartyWebForms sample's DetectGoogleSession.aspx page for usage of this factory.
+	/// </remarks>
+	public class UIRequestAtRelyingPartyFactory : IOpenIdExtensionFactory {
+		/// <summary>
+		/// The Type URI for the UI extension.
+		/// </summary>
+		private const string UITypeUri = "http://specs.openid.net/extensions/ui/1.0";
+
+		/// <summary>
+		/// Allows UIRequest extensions to be received by the relying party.  Useful when Google mirrors back the request
+		/// to indicate that a user is logged in.
+		/// </summary>
+		/// <param name="typeUri">The type URI of the extension.</param>
+		/// <param name="data">The parameters associated specifically with this extension.</param>
+		/// <param name="baseMessage">The OpenID message carrying this extension.</param>
+		/// <param name="isProviderRole">A value indicating whether this extension is being received at the OpenID Provider.</param>
+		/// <returns>
+		/// An instance of <see cref="IOpenIdMessageExtension"/> if the factory recognizes
+		/// the extension described in the input parameters; <c>null</c> otherwise.
+		/// </returns>
+		public DotNetOpenAuth.OpenId.Messages.IOpenIdMessageExtension Create(string typeUri, IDictionary<string, string> data, IProtocolMessageWithExtensions baseMessage, bool isProviderRole) {
+			if (typeUri == UITypeUri && !isProviderRole) {
+				return new UIRequest();
+			}
+
+			return null;
+		}
+	}
+}