public override async Task AuthenticateAsync(CancellationToken cancellationToken)
{
var emailAccount = _db.EmailAccounts.FirstOrDefault(ea => ea.Email == Account.Email);
if (emailAccount == null)
{
throw new InvalidOperationException($"No email account with address: {Account.Email}");
}
if (string.IsNullOrEmpty(emailAccount.AccessToken) || string.IsNullOrEmpty(emailAccount.RefreshToken))
{
throw new InvalidOperationException($"No token granted for email account: {emailAccount.Email}");
}
var refreshTokenRequest = new RefreshTokenRequest
{
ClientId = emailAccount.Username,
Secret = emailAccount.Password,
Tenant = emailAccount.Email.Split('@')[1],
RefreshToken = emailAccount.RefreshToken
};
refreshTokenRequest.Scopes.AddRange(M365Helper.EmailScopes);
var token = await OAuth2Helper.RefreshTokenAsync(refreshTokenRequest);
emailAccount.LastUpdateAccessToken = DateTime.UtcNow;
_db.EmailAccounts.Update(emailAccount);
await _db.SaveChangesAsync(cancellationToken);
var auth = new SaslMechanismOAuth2(emailAccount.Email, token.AccessToken);
await Client.AuthenticateAsync(auth, cancellationToken);
}
