Contents

# frozen_string_literal: true

require "active_model"
require "plissken"
require "tainbox"

module Polist
  class Service
    class Failure < StandardError
      attr_accessor :response

      def initialize(response)
        self.response = response
        super
      end
    end

    class Form
      include Tainbox
      include ActiveModel::Validations
    end

    attr_accessor :params

    def self.build(*args)
      new(*args)
    end

    def self.call(*args)
      build(*args).tap(&:call)
    end

    def self.run(*args)
      build(*args).tap(&:run)
    end

    def self.param(*names)
      names.each do |name|
        define_method(name) { params.fetch(name) }
      end
    end

    def initialize(params = {})
      self.params = params
    end

    def call; end # Should be implemented in subclasses

    def run
      call
    rescue Failure => error
      @response = error.response
      @failure = true
    end

    def response
      @response ||= {}
    end

    def failure?
      !!@failure
    end

    def success?
      !failure?
    end

    def validate!
      error!(form.errors.to_h.values.first) unless form.valid?
    end

    private

    def form
      @form ||= self.class::Form.new(form_attributes.to_snake_keys)
    end

    def form_attributes
      params
    end

    def fail!(response = {})
      raise self.class::Failure.new(response)
    end

    def error!(message = "")
      fail!(error: message)
    end

    def success!(response = {})
      @response = response
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
polist-0.1.2	lib/polist/service.rb