1 files changed, 133 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/Xrds/ServiceElement.cs b/src/DotNetOpenAuth.OpenId/Xrds/ServiceElement.cs
new file mode 100644
index 0000000..0acf2b5
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/Xrds/ServiceElement.cs
@@ -0,0 +1,133 @@
+//-----------------------------------------------------------------------
+// <copyright file="ServiceElement.cs" company="Andrew Arnott, Scott Hanselman">
+//     Copyright (c) Andrew Arnott, Scott Hanselman. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Xrds {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Xml.XPath;
+	using DotNetOpenAuth.OpenId;
+
+	/// <summary>
+	/// The Service element in an XRDS document.
+	/// </summary>
+	internal class ServiceElement : XrdsNode, IComparable<ServiceElement> {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="ServiceElement"/> class.
+		/// </summary>
+		/// <param name="serviceElement">The service element.</param>
+		/// <param name="parent">The parent.</param>
+		public ServiceElement(XPathNavigator serviceElement, XrdElement parent) :
+			base(serviceElement, parent) {
+		}
+
+		/// <summary>
+		/// Gets the XRD parent element.
+		/// </summary>
+		public XrdElement Xrd {
+			get { return (XrdElement)ParentNode; }
+		}
+
+		/// <summary>
+		/// Gets the priority.
+		/// </summary>
+		public int? Priority {
+			get {
+				XPathNavigator n = Node.SelectSingleNode("@priority", XmlNamespaceResolver);
+				return n != null ? n.ValueAsInt : (int?)null;
+			}
+		}
+
+		/// <summary>
+		/// Gets the URI child elements.
+		/// </summary>
+		public IEnumerable<UriElement> UriElements {
+			get {
+				List<UriElement> uris = new List<UriElement>();
+				foreach (XPathNavigator node in Node.Select("xrd:URI", XmlNamespaceResolver)) {
+					uris.Add(new UriElement(node, this));
+				}
+				uris.Sort();
+				return uris;
+			}
+		}
+
+		/// <summary>
+		/// Gets the type child elements.
+		/// </summary>
+		/// <value>The type elements.</value>
+		public IEnumerable<TypeElement> TypeElements {
+			get {
+				foreach (XPathNavigator node in Node.Select("xrd:Type", XmlNamespaceResolver)) {
+					yield return new TypeElement(node, this);
+				}
+			}
+		}
+
+		/// <summary>
+		/// Gets the type child element's URIs.
+		/// </summary>
+		public string[] TypeElementUris {
+			get {
+				return this.TypeElements.Select(type => type.Uri).ToArray();
+			}
+		}
+
+		/// <summary>
+		/// Gets the OP Local Identifier.
+		/// </summary>
+		public Identifier ProviderLocalIdentifier {
+			get {
+				var n = Node.SelectSingleNode("xrd:LocalID", XmlNamespaceResolver)
+					?? Node.SelectSingleNode("openid10:Delegate", XmlNamespaceResolver);
+				if (n != null && n.Value != null) {
+					string value = n.Value.Trim();
+					if (value.Length > 0) {
+						return n.Value;
+					}
+				}
+
+				return null;
+			}
+		}
+
+		#region IComparable<ServiceElement> Members
+
+		/// <summary>
+		/// Compares the current object with another object of the same type.
+		/// </summary>
+		/// <param name="other">An object to compare with this object.</param>
+		/// <returns>
+		/// A 32-bit signed integer that indicates the relative order of the objects being compared. The return value has the following meanings:
+		/// Value
+		/// Meaning
+		/// Less than zero
+		/// This object is less than the <paramref name="other"/> parameter.
+		/// Zero
+		/// This object is equal to <paramref name="other"/>.
+		/// Greater than zero
+		/// This object is greater than <paramref name="other"/>.
+		/// </returns>
+		public int CompareTo(ServiceElement other) {
+			if (other == null) {
+				return -1;
+			}
+			if (this.Priority.HasValue && other.Priority.HasValue) {
+				return this.Priority.Value.CompareTo(other.Priority.Value);
+			} else {
+				if (this.Priority.HasValue) {
+					return -1;
+				} else if (other.Priority.HasValue) {
+					return 1;
+				} else {
+					return 0;
+				}
+			}
+		}
+
+		#endregion
+	}
+}