A result handling object

callable.rb

module Callable
  extend ActiveSupport::Concern
  class_methods do
    def call(*args)
      new(*args).call
    end
  end
end

cli

> sp = ServicePoro.call('pass')
> sp.success?
> true
> sp.failure?
> false
> sp.errors
> []

> sp = ServicePoro.call('left')
> sp.success?
> false
> sp.failure?
> true
> sp.errors
> ['Given arg1 was not a pass']

result.rb

class Result
  def initialize(payload = {})
    @payload = payload
    @errors = []
    @success = true
  end

  def successful?
    @success && errors.empty?
  end

  alias success? successful?

  def failure?
    !successful?
  end

  def fail!
    @success = false
  end

  def add_error(*errors)
    @errors << errors
    @errors.flatten!
    nil
  end

  def errors
    @errors.dup
  end

  def prepare!(payload)
    @payload.merge!(payload)
    self
  end

  protected

  def method_missing(method_name, *)
    @payload.fetch(method_name) { super }
  end
end

service_poro.rb

class ServicePoro
  include Callable
  attr_reader :result
  
  def initialize(arg1 = 'fail')
    self.result = Result.new
    self.arg1 = arg1
  end
  
  def call
    result.prepare!(data: { arg1: arg1 })
    if arg1 == 'pass'
      result.prepare!(data: { status: 'pass' })
    else
      result.fail!
      result.add_error('Given arg1 was not a pass')
      result.prepare!(data: { status: 'fail' })
    end
    
    result
  end