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//-----------------------------------------------------------------------
// <copyright file="RelyingPartyEndpointDescription.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OpenId {
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text;
using DotNetOpenAuth.Messaging;
using Validation;
/// <summary>
/// A description of some OpenID Relying Party endpoint.
/// </summary>
/// <remarks>
/// This is an immutable type.
/// </remarks>
internal class RelyingPartyEndpointDescription {
/// <summary>
/// Initializes a new instance of the <see cref="RelyingPartyEndpointDescription"/> class.
/// </summary>
/// <param name="returnTo">The return to.</param>
/// <param name="supportedServiceTypeUris">
/// The Type URIs of supported services advertised on a relying party's XRDS document.
/// </param>
internal RelyingPartyEndpointDescription(Uri returnTo, string[] supportedServiceTypeUris) {
Requires.NotNull(returnTo, "returnTo");
Requires.NotNull(supportedServiceTypeUris, "supportedServiceTypeUris");
this.ReturnToEndpoint = returnTo;
this.Protocol = GetProtocolFromServices(supportedServiceTypeUris);
}
/// <summary>
/// Gets the URL to the login page on the discovered relying party web site.
/// </summary>
public Uri ReturnToEndpoint { get; private set; }
/// <summary>
/// Gets the OpenId protocol that the discovered relying party supports.
/// </summary>
public Protocol Protocol { get; private set; }
/// <summary>
/// Derives the highest OpenID protocol that this library and the OpenID Provider have
/// in common.
/// </summary>
/// <param name="supportedServiceTypeUris">The supported service type URIs.</param>
/// <returns>The best OpenID protocol version to use when communicating with this Provider.</returns>
[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "OpenID", Justification = "Spelling correct")]
private static Protocol GetProtocolFromServices(string[] supportedServiceTypeUris) {
Protocol protocol = Protocol.FindBestVersion(p => p.RPReturnToTypeURI, supportedServiceTypeUris);
if (protocol == null) {
throw new InvalidOperationException("Unable to determine the version of OpenID the Relying Party supports.");
}
return protocol;
}
}
}
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