//-----------------------------------------------------------------------
// <copyright file="Model.IssuedAccessToken.cs" company="Andrew Arnott">
//     Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------

namespace RelyingPartyLogic {
	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Web;
	using DotNetOpenAuth.OAuth.ChannelElements;

	public partial class IssuedAccessToken : IServiceProviderAccessToken {
		/// <summary>
		/// Gets the roles that the OAuth principal should belong to.
		/// </summary>
		/// <value>
		/// The roles that the user belongs to, or a subset of these according to the rights
		/// granted when the user authorized the request token.
		/// </value>
		string[] IServiceProviderAccessToken.Roles {
			get {
				List<string> roles = new List<string>();

				// Include the roles the user who authorized this OAuth token has.
				roles.AddRange(this.User.Roles.Select(r => r.Name));

				// Always add an extra role to indicate this is an OAuth-authorized request.
				// This allows us to deny access to account management pages to OAuth requests.
				roles.Add("delegated");

				return roles.ToArray();
			}
		}

		/// <summary>
		/// Gets the username of the principal that will be impersonated by this access token.
		/// </summary>
		/// <value>
		/// The name of the user who authorized the OAuth request token originally.
		/// </value>
		string IServiceProviderAccessToken.Username {
			get {
				// We don't really have the concept of a single username, but we
				// can use any of the authentication tokens instead since that
				// is what the rest of the web site expects.
				if (!this.UserReference.IsLoaded) {
					this.UserReference.Load();
				}
				if (!this.User.AuthenticationTokens.IsLoaded) {
					this.User.AuthenticationTokens.Load();
				}
				return this.User.AuthenticationTokens.First().ClaimedIdentifier;
			}
		}

		/// <summary>
		/// Gets the expiration date (local time) for the access token.
		/// </summary>
		/// <value>
		/// The expiration date, or <c>null</c> if there is no expiration date.
		/// </value>
		DateTime? IServiceProviderAccessToken.ExpirationDate {
			get { return this.ExpirationDateUtc.HasValue ? (DateTime?)this.ExpirationDateUtc.Value.ToLocalTime() : null; }
		}

		partial void OnExpirationDateUtcChanging(DateTime? value) {
			if (value.HasValue) {
				Utilities.VerifyThrowNotLocalTime(value.Value);
			}
		}
	}
}