public async Task <bool> UserIsAuthenticatedAndValidAsync()
{
if (!IsAuthenticated)
{
return(false);
}
else if (!AuthenticatedUser.LoggedInWithSNSAccount)
{
return(true);
}
else
{
bool refreshSucceded = false;
oAuth2 = OAuth2ProviderFactory.CreateProvider(AuthenticatedUser.Provider);
try
{
var utcNow = DateTime.UtcNow.AddMinutes(30);
if (AuthenticatedUser.ExpiresIn < utcNow)
{
var(isRefresh, user) = await oAuth2.RefreshTokenAsync(AuthenticatedUser);
if (isRefresh)
{
user.SaveUserInfo();
}
else
{
UserInfo.RemoveUserInfo();
}
refreshSucceded = isRefresh;
}
else
{
refreshSucceded = true;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine($"Error with refresh attempt: {ex}");
}
return(refreshSucceded);
}
}
public bool LoginWithSNS(SNSProvider provider)
{
try
{
oAuth2 = OAuth2ProviderFactory.CreateProvider(provider);
var authenticator = new OAuth2Authenticator(
oAuth2.ClientId,
oAuth2.ClientSecret,
oAuth2.Scope,
oAuth2.AuthorizationUri,
oAuth2.RedirectUri,
oAuth2.RequestTokenUri,
null,
oAuth2.IsUsingNativeUI);
authenticator.Completed += async(s, e) =>
{
//var auth2Authenticator = s as OAuth2Authenticator;
if (e.IsAuthenticated)
{
// If the user is authenticated, request their basic user data from Google
// UserInfoUrl = https://www.googleapis.com/oauth2/v2/userinfo
var user = await oAuth2.GetUserInfoAsync(e.Account);
//AppSettings.User = user;
user.SaveUserInfo();
MessagingCenter.Send(user, MessengerKeys.AuthenticationRequested, true);
//Debug.WriteLine("Authentication Success");
}
};
authenticator.Error += (s, e) =>
{
//Debug.WriteLine("Authentication error: " + e.Message);
};
var presenter = new Xamarin.Auth.Presenters.OAuthLoginPresenter();
presenter.Login(authenticator);
}
catch (Exception ex)
{
//Debug.WriteLine("Login Error : " + ex.Message);
return(false);
}
return(true);
}
public Task LoginWithSNSAsync(SNSProvider provider)
{
try
{
oAuth2 = OAuth2ProviderFactory.CreateProvider(provider);
var authenticator = new OAuth2Authenticator(
oAuth2.ClientId,
oAuth2.ClientSecret,
oAuth2.Scope,
oAuth2.AuthorizationUri,
oAuth2.RedirectUri,
oAuth2.RequestTokenUri,
null,
oAuth2.IsUsingNativeUI);
authenticator.Completed += async(s, e) =>
{
if (e.IsAuthenticated)
{
var user = await oAuth2.GetUserInfoAsync(e.Account);
AppSettings.User = user;
MessagingCenter.Send(user, MessengerKey.AuthenticationRequested, true);
Debug.WriteLine("Authentication Success");
}
};
authenticator.Error += (s, e) =>
{
Debug.WriteLine("Authentication error: " + e.Message);
};
var presenter = new Xamarin.Auth.Presenters.OAuthLoginPresenter();
presenter.Login(authenticator);
}
catch (Exception ex)
{
Debug.WriteLine("Login Error : " + ex.Message);
return(Task.FromResult(false));
}
return(Task.FromResult(true));
}