public async Task <string> Promote_with_async_methods_in_the_beginning_and_in_the_middle_of_the_chain(long id)
{
var gateway = new EmailGateway();
return(await GetByIdAsync(id)
.EnsureAsync(customer => customer.CanBePromoted(), "The customer has the highest status possible")
.OnSuccessAsync(customer => customer.PromoteAsync())
.OnSuccessAsync(customer => gateway.SendPromotionNotificationAsync(customer.Email))
.OnBothAsync(result => result.IsSuccess ? "Ok" : result.Error.FormatString()));
}
public async Task <string> Promote_with_async_methods_in_the_middle_of_the_chain(long id)
{
var gateway = new EmailGateway();
return(await GetById(id)
.ToResult("Customer with such Id is not found: " + id)
.Ensure(customer => customer.CanBePromoted(), "The customer has the highest status possible")
.OnSuccess(customer => customer.PromoteAsync())
.OnSuccess(customer => gateway.SendPromotionNotificationAsync(customer.Email))
.OnBoth(result => result.IsSuccess ? "Ok" : result.Error));
}
public async Task <string> Promote_with_async_methods_in_the_beginning_and_in_the_middle_of_the_chain_using_compensate(long id)
{
var gateway = new EmailGateway();
return(await GetByIdAsync(id)
.ToResult("Customer with such Id is not found: " + id)
.Ensure(customer => customer.CanBePromoted(), "Need to ask manager")
.OnFailure(error => Log(error))
.OnFailureCompensate(() => AskManager(id))
.Tap(customer => Log("Manager approved promotion"))
.Tap(customer => customer.PromoteAsync())
.Bind(customer => gateway.SendPromotionNotificationAsync(customer.Email))
.Finally(result => result.IsSuccess ? "Ok" : result.Error));
}