1 files changed, 69 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs
new file mode 100644
index 0000000..9dc0574
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/DateTimeEncoder.cs
@@ -0,0 +1,69 @@
+//-----------------------------------------------------------------------
+// <copyright file="DateTimeEncoder.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
+	using System;
+	using System.Globalization;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.Messaging.Reflection;
+
+	/// <summary>
+	/// An encoder/decoder design for DateTimes that must conform to the PAPE spec.
+	/// </summary>
+	/// <remarks>
+	/// The timestamp MUST be formatted as specified in section 5.6 of [RFC3339] (Klyne, G. and C. Newman, “Date and Time on the Internet: Timestamps,” .), with the following restrictions:
+	///  * All times must be in the UTC timezone, indicated with a "Z".
+	///  * No fractional seconds are allowed
+	/// For example: 2005-05-15T17:11:51Z
+	/// </remarks>
+	internal class DateTimeEncoder : IMessagePartEncoder {
+		/// <summary>
+		/// An array of the date/time formats allowed by the PAPE extension.
+		/// </summary>
+		/// <remarks>
+		/// TODO: This array of formats is not yet a complete list.
+		/// </remarks>
+		private static readonly string[] PermissibleDateTimeFormats = { "yyyy-MM-ddTHH:mm:ssZ" };
+
+		#region IMessagePartEncoder Members
+
+		/// <summary>
+		/// Encodes the specified value.
+		/// </summary>
+		/// <param name="value">The value.  Guaranteed to never be null.</param>
+		/// <returns>
+		/// The <paramref name="value"/> in string form, ready for message transport.
+		/// </returns>
+		public string Encode(object value) {
+			DateTime? dateTime = value as DateTime?;
+			if (dateTime.HasValue) {
+				return dateTime.Value.ToUniversalTimeSafe().ToString(PermissibleDateTimeFormats[0], CultureInfo.InvariantCulture);
+			} else {
+				return null;
+			}
+		}
+
+		/// <summary>
+		/// Decodes the specified value.
+		/// </summary>
+		/// <param name="value">The string value carried by the transport.  Guaranteed to never be null, although it may be empty.</param>
+		/// <returns>
+		/// The deserialized form of the given string.
+		/// </returns>
+		/// <exception cref="FormatException">Thrown when the string value given cannot be decoded into the required object type.</exception>
+		public object Decode(string value) {
+			DateTime dateTime;
+			if (DateTime.TryParse(value, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal, out dateTime) && dateTime.Kind == DateTimeKind.Utc) { // may be unspecified per our option above
+				return dateTime;
+			} else {
+				Logger.OpenId.ErrorFormat("Invalid format for message part: {0}", value);
+				return null;
+			}
+		}
+
+		#endregion
+	}
+}