public class ChatClient : ChatProvider
    {
      
        private class RelationshipFile
        {
            public UserApi.Relationship Relationship { get; set; }
            public MediaApi.File File { get; set; }
        }

        #region        //TODO:integration code for friend list:
        public override AppDataManager CreateDataManagerInstance(AppPortal portal)
        {
            return new MyDataManager(portal);
        }

        class MyDataManager : AppDataManager
        {

            public override IChatUserInfo[] GetContacts(ChatIdentity identity)
            {
                string myname = ChatProvider.Instance.FromUserId(identity.UniqueId);

                UserData userdata = new UserData();

                string[] friends = userdata.GetUsersFriends(myname);
                IChatUserInfo[] arr = null;
                if (friends != null)
                {
                    arr = new IChatUserInfo[friends.Length];
                    for (int i = 0; i < friends.Length; i++)
                    {
                        string friendid = ChatProvider.Instance.ToUserId(friends[i]);
                        arr[i] = base.GetUserInfo(friendid);
                        //arr[i].DisplayName = "";
                    }
                }
                else
                {
                    arr = new IChatUserInfo[0];
                }
               
                return arr;
            }

            public override void AddIgnore(ChatIdentity identity, string userid)
            {
                base.AddIgnore(identity, userid);
            }
            public override void RemoveIgnore(ChatIdentity identity, string userid)
            {
                base.RemoveIgnore(identity, userid);
            }
            public override IChatUserInfo[] GetIgnores(ChatIdentity identity)
            {
                return base.GetIgnores(identity);
            }


            public MyDataManager(AppPortal portal)
                : base(portal)
            {
            }
        }
        #endregion

        public override String GetConnectionString()
        {
            //return System.Configuration.ConfigurationSettings.AppSettings["Site.Properties.Settings.DatabaseConnection]"];

            return Properties.Settings.Default.DatabaseConnection;
            
        }

        /// <summary>
        /// find the username by the displayname
        /// </summary>
        public override string FindUserLoginName(string nickName)
        {
            UserData userdata = new UserData();
            if (userdata.IsUserExistByScreename(nickName))
                return nickName;
            return null;
        }

        public override bool GetUserInfo(string loginName, ref string nickName)
        {
            UserData userdata = new UserData();
            if (!userdata.IsUsernameExists(loginName))
                return false;

            nickName = loginName;

            Huzu.UserModule.Classes.User userObj = Huzu.UserModule.Classes.User.CreateByUsername(loginName);

            if (userObj != null)
            {
                nickName = userObj.Screenname;
            }

            return true;
        }

        /// <summary>
        /// get the information from the user
        /// This function is very important and be called very frequently.
        /// </summary>
        public override bool GetUserInfo(string loginName, ref string nickName, ref bool isAdmin)
        {
            UserData userdata = new UserData();

            if (!userdata.IsUsernameExists(loginName))
                return false;

            nickName = loginName;

            isAdmin = false; //SamplePortal.Global.IsUserInRole("Admins", loginName);

            Huzu.UserModule.Classes.User userObj = Huzu.UserModule.Classes.User.CreateByUsername(loginName);


            if (userObj != null)
            {
                if (userObj.IsInRole(Properties.Settings.Default.AdminUserRoleId))
                {
                    isAdmin = true;
                }
                nickName = userObj.Screenname;
            }
            
            return true;
        }

        /// <summary>
        /// validate the user , and set the cookie
        /// </summary>
        public override bool ValidateUser(string loginName, string pwd)
        {
            UserData userdata = new UserData();
            if (!userdata.Login(loginName, pwd))
                return false;

            System.Web.Security.FormsAuthentication.SetAuthCookie(loginName, false, "/");

            return true;
        }

        public override AppChatIdentity GetLogonIdentity()
        {
            string loginname = "";
            string nickname = "";
            if (UserApi.User.IsLoggedIn)
            {
                loginname = UserApi.User.LoggedInUser.Username;
                nickname = UserApi.User.LoggedInUser.Username; //this needs to be changed to Screename
                return new AppChatIdentity(nickname, false, ToUserId(loginname), HttpContext.Current.Request.UserHostAddress);
            }
            else
            {
                return null; //TODO: Redirect to login page
            }
            
        }

    }