1 files changed, 65 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/PapeUtilities.cs b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/PapeUtilities.cs
new file mode 100644
index 0000000..d8ffb63
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/OpenId/Extensions/ProviderAuthenticationPolicy/PapeUtilities.cs
@@ -0,0 +1,65 @@
+//-----------------------------------------------------------------------
+// <copyright file="PapeUtilities.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.Contracts;
+	using System.Globalization;
+	using System.Linq;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// Utility methods for use by the PAPE extension.
+	/// </summary>
+	internal static class PapeUtilities {
+		/// <summary>
+		/// Looks at the incoming fields and figures out what the aliases and name spaces for auth level types are.
+		/// </summary>
+		/// <param name="fields">The incoming message data in which to discover TypeURIs and aliases.</param>
+		/// <returns>The <see cref="AliasManager"/> initialized with the given data.</returns>
+		internal static AliasManager FindIncomingAliases(IDictionary<string, string> fields) {
+			AliasManager aliasManager = new AliasManager();
+
+			foreach (var pair in fields) {
+				if (!pair.Key.StartsWith(Constants.AuthLevelNamespaceDeclarationPrefix, StringComparison.Ordinal)) {
+					continue;
+				}
+
+				string alias = pair.Key.Substring(Constants.AuthLevelNamespaceDeclarationPrefix.Length);
+				aliasManager.SetAlias(alias, pair.Value);
+			}
+
+			aliasManager.SetPreferredAliasesWhereNotSet(Constants.AssuranceLevels.PreferredTypeUriToAliasMap);
+
+			return aliasManager;
+		}
+
+		/// <summary>
+		/// Concatenates a sequence of strings using a space as a separator.
+		/// </summary>
+		/// <param name="values">The elements to concatenate together..</param>
+		/// <returns>The concatenated string of elements.</returns>
+		/// <exception cref="FormatException">Thrown if any element in the sequence includes a space.</exception>
+		internal static string ConcatenateListOfElements(IEnumerable<string> values) {
+			Requires.NotNull(values, "values");
+
+			StringBuilder valuesList = new StringBuilder();
+			foreach (string value in values.Distinct()) {
+				if (value.Contains(" ")) {
+					throw new FormatException(string.Format(CultureInfo.CurrentCulture, OpenIdStrings.InvalidUri, value));
+				}
+				valuesList.Append(value);
+				valuesList.Append(" ");
+			}
+			if (valuesList.Length > 0) {
+				valuesList.Length -= 1; // remove trailing space
+			}
+			return valuesList.ToString();
+		}
+	}
+}