Chain of responsibility pattern

chain.rb

# frozen_string_literal: true

module ChainOfResponsibility
  attr_accessor :next

  def handle(result)
    @next&.handle(result) || result # Run next handler or return result
  end
end

class UploadImage
  include ChainOfResponsibility

  def handle(job_order)
    puts "upload image for #{job_order}"

    super(job_order)
  end
end

class Notify
  include ChainOfResponsibility

  def handle(job_order)
    puts "notify for #{job_order}"

    super(job_order)
  end
end

class Update
  include ChainOfResponsibility

  def handle(job_order)
    puts "update for #{job_order}"

    super(job_order)
  end
end

chain = [UploadImage.new, Update.new, Notify.new]

## Connect chain
chain.inject do |current_klass, next_klass|
  current_klass.next = next_klass
end

chain.first.handle('job order')

# upload image for job order
# update for job order
# notify for job order