1 files changed, 45 insertions, 0 deletions
diff --git a/src/DotNetOpenId/Extensions/AttributeRequest.cs b/src/DotNetOpenId/Extensions/AttributeRequest.cs
new file mode 100644
index 0000000..4c8e947
--- /dev/null
+++ b/src/DotNetOpenId/Extensions/AttributeRequest.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Globalization;
+
+namespace DotNetOpenId.Extensions {
+	/// <summary>
+	/// An individual attribute to be requested of the OpenID Provider using
+	/// the Attribute Exchange extension.
+	/// </summary>
+	public class AttributeRequest {
+		/// <summary>
+		/// The URI uniquely identifying the attribute being requested.
+		/// </summary>
+		public string TypeUri;
+		/// <summary>
+		/// Whether the relying party considers this a required field.
+		/// Note that even if set to true, the Provider may not provide the value.
+		/// </summary>
+		public bool IsRequired;
+		int count = 1;
+		/// <summary>
+		/// The maximum number of values for this attribute the 
+		/// Relying Party wishes to receive from the OpenID Provider.
+		/// A value of int.MaxValue is considered infinity.
+		/// </summary>
+		public int Count {
+			get { return count; }
+			set {
+				if (value <= 0) throw new ArgumentOutOfRangeException("value");
+				count = value;
+			}
+		}
+
+		public AttributeResponse Respond(params string[] values) {
+			if (values == null) throw new ArgumentNullException("values");
+			if (values.Length > Count) throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
+			   Strings.AttributeTooManyValues, Count, TypeUri, values.Length));
+			return new AttributeResponse {
+				TypeUri = this.TypeUri,
+				Values = values,
+			};
+		}
+	}
+}