/main-techdays/src/Veracruz.Facebook/Web/Security/FacebookMembershipProvider.cs

using System;

using System.Data;

using System.Configuration;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using Microsoft.IdentityModel.Claims;

using Veracruz.IdentityModel;

using Microsoft.IdentityModel.Web;

using Veracruz.Facebook.IdentityModel;

using System.Globalization;

using System.Threading;



namespace Veracruz.Facebook.Web.Security

{

    public class FacebookMembershipProvider : MembershipProvider

    {

        #region fields



        private string m_applicationName;



        #endregion

        #region props



        public override string ApplicationName

        {

            get { return m_applicationName; }

            set { m_applicationName = value; }

        }

        public override bool EnablePasswordReset

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override bool EnablePasswordRetrieval

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override int MaxInvalidPasswordAttempts

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override int MinRequiredNonAlphanumericCharacters

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override int MinRequiredPasswordLength

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override int PasswordAttemptWindow

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override MembershipPasswordFormat PasswordFormat

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override string PasswordStrengthRegularExpression

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override bool RequiresQuestionAndAnswer

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        public override bool RequiresUniqueEmail

        {

            get { throw new NotImplementedException(); } // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        #endregion

        #region not implemented methods



        private Session GetSession()

        {

            IClaimsIdentity l_identity = Thread.CurrentPrincipal.Identity as IClaimsIdentity;

            if (l_identity == null)

            {

                throw new NotSupportedException();

            }



            Session l_session = null;

            if (String.Compare(l_identity.AuthenticationType, "Facebook", true, CultureInfo.InvariantCulture) == 0)

            {

                l_session = l_identity.GetSession();

            }

            else

            {

                ClaimsPrincipal __facebookPrincipal = HttpContext.Current.Session["CachedClaims"] as ClaimsPrincipal;

                if (__facebookPrincipal != null)

                {

                    l_session = ((IClaimsIdentity)__facebookPrincipal.Identity).GetSession();

                }

                else 

                {

                    HttpContext.Current.Response.Redirect("~/_admin/facebookauth.aspx");

                }

            }



            if (l_session == null)

            {

                throw new NotSupportedException();

            }

            return l_session;

        }

        public override bool ChangePassword(string username, string oldPassword, string newPassword)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override bool ChangePasswordQuestionAndAnswer(string username, string password, string newPasswordQuestion, string newPasswordAnswer)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override bool DeleteUser(string username, bool deleteAllRelatedData)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override string GetPassword(string username, string answer)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override string ResetPassword(string username, string answer)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override bool UnlockUser(string userName)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }

        public override void UpdateUser(MembershipUser user)

        {

            throw new NotImplementedException(); // HACK : This membership provider is only a facade of the Facebook authentication mechanim.

        }



        #endregion

        #region methods



        public override string GetUserNameByEmail(string email)

        {

            return email; // The username is equals to the email.

        }

        public override MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)

        {

            UserInfo[] l_userInfos = FacebookHelper.GetAllUserInfos(GetSession(), pageIndex, pageSize);

            totalRecords = l_userInfos.Length;

            MembershipUserCollection l_membershipUserCollection = new MembershipUserCollection();

            for (int i = 0; i < l_userInfos.Length; i++)

            {

                l_membershipUserCollection.Add(l_userInfos[i].CreateMembershipUser());

            }

            return l_membershipUserCollection;

        }

        public override MembershipUser GetUser(string username, bool userIsOnline)

        {

            if (string.IsNullOrEmpty(username))

            {

                throw new ArgumentNullException("username");

            }

            UserInfo l_userInfo = FacebookHelper.GetUserInfo(GetSession(), username);

            if (l_userInfo == null)

                return null;

            else

                return l_userInfo.CreateMembershipUser();

        }

        public override MembershipUser GetUser(object providerUserKey, bool userIsOnline)

        {

            if (!(providerUserKey is long))

            {

                throw new NotImplementedException();

            }

            UserInfo l_userInfo = FacebookHelper.GetUserInfo(GetSession(), (long)providerUserKey);

            return l_userInfo.CreateMembershipUser();

        }

        public override bool ValidateUser(string username, string password)

        {

            //if (!string.IsNullOrEmpty(password))

            //{

            //    throw new ArgumentException("", "password");

            //}

            //IClaimsIdentity l_identity = (IClaimsIdentity)ClaimsPrincipal.Current.Identity;

            //string l_email = l_identity.GetClaimValue(System.IdentityModel.Claims.ClaimTypes.Email);

            //return (l_email == username);

            

            IClaimsIdentity __claimsIdentity = Thread.CurrentPrincipal.Identity as IClaimsIdentity;

            return __claimsIdentity != null && __claimsIdentity.IsAuthenticated;

        }

        public override MembershipUserCollection FindUsersByName(string usernameToMatch, int pageIndex, int pageSize, out int totalRecords)

        {

            if (string.IsNullOrEmpty(usernameToMatch))

            {

                throw new ArgumentNullException("usernameToMatch");

            }



            UserInfo[] l_userInfos = FacebookHelper.FindUserInfosByFullName(GetSession(), usernameToMatch, pageIndex, pageSize);

            totalRecords = l_userInfos.Length;



            MembershipUserCollection l_membershipUserCollection = new MembershipUserCollection();

            for (int i = 0; i < l_userInfos.Length; i++)

            {

                l_membershipUserCollection.Add(l_userInfos[i].CreateMembershipUser());

            }

            return l_membershipUserCollection;

            //return this.FindUsersByEmail(usernameToMatch, pageIndex, pageSize, out totalRecords);

        }

        public override MembershipUserCollection FindUsersByEmail(string emailToMatch, int pageIndex, int pageSize, out int totalRecords)

        {

            if (string.IsNullOrEmpty(emailToMatch))

            {

                throw new ArgumentNullException("emailToMatch");

            }

            UserInfo[] l_userInfos = FacebookHelper.FindUserInfosByEmail(GetSession(), emailToMatch, pageIndex, pageSize);

            totalRecords = l_userInfos.Length;

            MembershipUserCollection l_membershipUserCollection = new MembershipUserCollection();

            for (int i = 0; i < l_userInfos.Length; i++)

            {

                l_membershipUserCollection.Add(l_userInfos[i].CreateMembershipUser());

            }

            return l_membershipUserCollection;

        }

        public override int GetNumberOfUsersOnline()

        {

            // HACK : Facebook provides currently a who is online feature only on friends of an user.

            // TODO : Develop a online mechanism on dedicated association facebook data store ?

            return FacebookHelper.GetNumberOfUsersOnline(GetSession());

        }



        #endregion

    }

}