1 files changed, 61 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.ApplicationBlock/YammerConsumer.cs b/src/DotNetOpenAuth.ApplicationBlock/YammerConsumer.cs
new file mode 100644
index 0000000..bbeb861
--- /dev/null
+++ b/src/DotNetOpenAuth.ApplicationBlock/YammerConsumer.cs
@@ -0,0 +1,61 @@
+//-----------------------------------------------------------------------
+// <copyright file="YammerConsumer.cs" company="Outercurve Foundation">
+//     Copyright (c) Outercurve Foundation. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.ApplicationBlock {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Net;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OAuth;
+	using DotNetOpenAuth.OAuth.ChannelElements;
+	using DotNetOpenAuth.OAuth.Messages;
+
+	public static class YammerConsumer {
+		/// <summary>
+		/// The Consumer to use for accessing Google data APIs.
+		/// </summary>
+		public static readonly ServiceProviderDescription ServiceDescription = new ServiceProviderDescription {
+			RequestTokenEndpoint = new MessageReceivingEndpoint("https://www.yammer.com/oauth/request_token", HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.PostRequest),
+			UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://www.yammer.com/oauth/authorize", HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.GetRequest),
+			AccessTokenEndpoint = new MessageReceivingEndpoint("https://www.yammer.com/oauth/access_token", HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.PostRequest),
+			TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new PlaintextSigningBindingElement() },
+			ProtocolVersion = ProtocolVersion.V10,
+		};
+
+		public static DesktopConsumer CreateConsumer(IConsumerTokenManager tokenManager) {
+			return new DesktopConsumer(ServiceDescription, tokenManager);
+		}
+
+		public static Uri PrepareRequestAuthorization(DesktopConsumer consumer, out string requestToken) {
+			if (consumer == null) {
+				throw new ArgumentNullException("consumer");
+			}
+
+			Uri authorizationUrl = consumer.RequestUserAuthorization(null, null, out requestToken);
+			return authorizationUrl;
+		}
+
+		public static AuthorizedTokenResponse CompleteAuthorization(DesktopConsumer consumer, string requestToken, string userCode) {
+			// Because Yammer has a proprietary callback_token parameter, and it's passed
+			// with the message that specifically bans extra arguments being passed, we have
+			// to cheat by adding the data to the URL itself here.
+			var customServiceDescription = new ServiceProviderDescription {
+				RequestTokenEndpoint = ServiceDescription.RequestTokenEndpoint,
+				UserAuthorizationEndpoint = ServiceDescription.UserAuthorizationEndpoint,
+				AccessTokenEndpoint = new MessageReceivingEndpoint(ServiceDescription.AccessTokenEndpoint.Location.AbsoluteUri + "?oauth_verifier=" + Uri.EscapeDataString(userCode), HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.PostRequest),
+				TamperProtectionElements = ServiceDescription.TamperProtectionElements,
+				ProtocolVersion = ProtocolVersion.V10,
+			};
+
+			// To use a custom service description we also must create a new WebConsumer.
+			var customConsumer = new DesktopConsumer(customServiceDescription, consumer.TokenManager);
+			var response = customConsumer.ProcessUserAuthorization(requestToken, userCode);
+			return response;
+		}
+	}
+}