VadVergasov_Programming/5/Lab_153503_Verhasau/IdentityServer/Pages/Account/Login/ViewModel.cs
// Copyright (c) Duende Software. All rights reserved.
// See LICENSE in the project root for license information.

namespace IdentityServer.Pages.Login
{
    public class ViewModel
    {
        public bool AllowRememberLogin { get; set; } = true;
        public bool EnableLocalLogin { get; set; } = true;

        public IEnumerable<ViewModel.ExternalProvider> ExternalProviders { get; set; } = Enumerable.Empty<ExternalProvider>();
        public IEnumerable<ViewModel.ExternalProvider> VisibleExternalProviders => ExternalProviders.Where(x => !String.IsNullOrWhiteSpace(x.DisplayName));

        public bool IsExternalLoginOnly => EnableLocalLogin == false && ExternalProviders?.Count() == 1;
        public string ExternalLoginScheme => IsExternalLoginOnly ? ExternalProviders?.SingleOrDefault()?.AuthenticationScheme : null;

        public class ExternalProvider
        {
            public string DisplayName { get; set; }
            public string AuthenticationScheme { get; set; }
        }
    }
}