src/DotNetOpenAuth/OpenId/Extensions/ProviderAuthenticationPolicy/PapeUtilities.cs

   1 namespace DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy {
   2         using System;
   3         using System.Collections.Generic;
   4         using System.Linq;
   5         using System.Text;
   6         using DotNetOpenAuth.Messaging;
   7         using System.Globalization;
   8
   9         internal static class PapeUtilities {
  10                 static internal IEnumerable<T> GetUniqueItems<T>(IList<T> list) {
  11                         List<T> itemsSeen = new List<T>(list.Count);
  12                         foreach (T item in list) {
  13                                 if (itemsSeen.Contains(item)) continue;
  14                                 itemsSeen.Add(item);
  15                                 yield return item;
  16                         }
  17                 }
  18
  19                 /// <summary>
  20                 /// Looks at the incoming fields and figures out what the aliases and name spaces for auth level types are.
  21                 /// </summary>
  22                 internal static AliasManager FindIncomingAliases(IDictionary<string, string> fields) {
  23                         AliasManager aliasManager = new AliasManager();
  24
  25                         foreach (var pair in fields) {
  26                                 if (!pair.Key.StartsWith(Constants.AuthLevelNamespaceDeclarationPrefix, StringComparison.Ordinal)) {
  27                                         continue;
  28                                 }
  29
  30                                 string alias = pair.Key.Substring(Constants.AuthLevelNamespaceDeclarationPrefix.Length);
  31                                 aliasManager.SetAlias(alias, pair.Value);
  32                         }
  33
  34                         aliasManager.SetPreferredAliasesWhereNotSet(Constants.AuthenticationLevels.PreferredTypeUriToAliasMap);
  35
  36                         return aliasManager;
  37                 }
  38
  39                 internal static string ConcatenateListOfElements(IList<string> values) {
  40                         ErrorUtilities.VerifyArgumentNotNull(values, "values");
  41
  42                         StringBuilder valuesList = new StringBuilder();
  43                         foreach (string value in GetUniqueItems(values)) {
  44                                 if (value.Contains(" ")) {
  45                                         throw new FormatException(string.Format(CultureInfo.CurrentCulture,
  46                                                 OpenIdStrings.InvalidUri, value));
  47                                 }
  48                                 valuesList.Append(value);
  49                                 valuesList.Append(" ");
  50                         }
  51                         if (valuesList.Length > 0)
  52                                 valuesList.Length -= 1; // remove trailing space
  53                         return valuesList.ToString();
  54                 }
  55         }
  56 }