MauiAuthApp.Models.AuthenticationModel.LoginAsync.cs

MauiAuthApp.Models.AuthenticationModel.LoginAsync.cs

namespace MauiAuthApp.Models
{
    internal class AuthenticationModel : IDisposable
    {
        public async Task<string> LoginAsync()
        {
            try
            {
                var authService = new AuthenticationService();
                var result = await authService.LoginAsync(CancellationToken.None);
                var token = result?.IdToken;
                if (token != null)
                {
                    var handler = new JwtSecurityTokenHandler();
                    var data = handler.ReadJwtToken(token);//JwtSecurityTokenHandlerを使ってトークンをデータ化する
                    if (data != null)
                    {
                        var stringBuilder = new StringBuilder();
                        stringBuilder.AppendLine($"ClientId: {data.Audiences.FirstOrDefault()}");
                        stringBuilder.AppendLine($"aud: {data.Claims.FirstOrDefault(x => x.Type.Equals("aud"))?.Value}");
                        stringBuilder.AppendLine($"Name: {data.Claims.FirstOrDefault(x => x.Type.Equals("name"))?.Value}");
                        stringBuilder.AppendLine($"Email: {data.Claims.FirstOrDefault(x => x.Type.Equals("preferred_username"))?.Value}");
                        token = stringBuilder.ToString();
                    }
                }
                return token ?? "Empty";
            }
            catch (MsalClientException ex)
            {
                return ex.Message;
            }
        }

        public void Dispose()
        {
        }
    }