Allow Success and Failure to have more than one symbol

[bvicenzo]

In exceptions, we can catch or a single error, or a family of errors, using its superclass...

Ex:

ClientError = Class.new(RuntimeError)
UnprocessableEntity = Class.new(ClientError)
Conflict = Class.new(ClientError)

def foo
  create_user
  rescue UnprocessableEntity => error
    "User can not be created fix errors and try again #{error.message}"
  rescue Conflict
    "User already exist."
  rescue ClientError => error
    Sentry.capture_exception("Some unexpected client error happened: #{error.message}")
    "Unknow error happened, please contact system administration"
end

Nowadays it is impossible in FService, because we can create a result using just one symbol....
If we are able to put more than one symbol, we could, for example, pass a specific symbol and a more generic one.

Ex:

class User::Create < FService::Base
  attribute :attr

  def run
    response = create_user(attrs)
    return Success(:ok, :created, data: response.body) if response.status == 200

    if response.status.between?(400, 499)
      error_name = client_error_name(response.status)
      if error_name.error_name.present?
        Failure(:unprocessable_entity, :client_error, data: response.body)
      else
        Failure(:client_error, data: response.body)
      end
    end
  end

  private

  def client_error_name(status)
    return :unprocessable_entity if status = 422
    return :conflict if status = 409
  end
end

And the usage would be:

User::Create(attrs: { name: 'Joe' })
  .on_success(:created) { return 'User created' }
  .on_failure(:unprocessable_entity) { |error| return "User can not be created fix errors and try again #{error}" }
  .on_failure(:conflict) { return "User already exist." }
  .on_failure(:client_error) do
    Sentry.capture_exception("Some unexpected client error happened: #{error.message}")
    return "Unknow error happened, please contact system administration"
  end

[bvicenzo]

Solved by: #41