1 files changed, 67 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2/OAuth2/IAuthorizationState.cs b/src/DotNetOpenAuth.OAuth2/OAuth2/IAuthorizationState.cs
new file mode 100644
index 0000000..39437ac
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth2/OAuth2/IAuthorizationState.cs
@@ -0,0 +1,67 @@
+//-----------------------------------------------------------------------
+// <copyright file="IAuthorizationState.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2 {
+	using System;
+	using System.Collections.Generic;
+
+	/// <summary>
+	/// Provides access to a persistent object that tracks the state of an authorization.
+	/// </summary>
+	public interface IAuthorizationState {
+		/// <summary>
+		/// Gets or sets the callback URL used to obtain authorization.
+		/// </summary>
+		/// <value>The callback URL.</value>
+		Uri Callback { get; set; }
+
+		/// <summary>
+		/// Gets or sets the long-lived token used to renew the short-lived <see cref="AccessToken"/>.
+		/// </summary>
+		/// <value>The refresh token.</value>
+		string RefreshToken { get; set; }
+
+		/// <summary>
+		/// Gets or sets the access token.
+		/// </summary>
+		/// <value>The access token.</value>
+		string AccessToken { get; set; }
+
+		/// <summary>
+		/// Gets or sets the access token issue date UTC.
+		/// </summary>
+		/// <value>The access token issue date UTC.</value>
+		DateTime? AccessTokenIssueDateUtc { get; set; }
+
+		/// <summary>
+		/// Gets or sets the access token UTC expiration date.
+		/// </summary>
+		DateTime? AccessTokenExpirationUtc { get; set; }
+
+		/// <summary>
+		/// Gets the scope the token is (to be) authorized for.
+		/// </summary>
+		/// <value>The scope.</value>
+		HashSet<string> Scope { get; }
+
+		/// <summary>
+		/// Deletes this authorization, including access token and refresh token where applicable.
+		/// </summary>
+		/// <remarks>
+		/// This method is invoked when an authorization attempt fails, is rejected, is revoked, or
+		/// expires and cannot be renewed.
+		/// </remarks>
+		void Delete();
+
+		/// <summary>
+		/// Saves any changes made to this authorization object's properties.
+		/// </summary>
+		/// <remarks>
+		/// This method is invoked after DotNetOpenAuth changes any property.
+		/// </remarks>
+		void SaveChanges();
+	}
+}
+\ No newline at end of file