Bad Single Responsibility Principle Example

transaction.rb

module Integration
  class Transaction
    def initialize
      @connection = Integration::Connection.new
    end
    def create!(registration, card)
      message = xml_builder("requisicao-transacao") do |xml|
        xml.numero registration.id
        xml.valor registration.training_class.price.to_i * 100
        xml.moeda "986"
        # ... MONTA UM XML COMPLEXO ...
      end
      make_request! message
    end
    
    private
    def make_request!(message)
      params = { mensagem: message.target! }
      
      # ... FAZ MAIS COISAS AQUI ...
      
      result = @connection.request! params
      parse_response(result)
    end
    
    def parse_response(response)
      case response
      when Net::HTTPSuccess
        document = REXML::Document.new(response.body)
        parse_elements(document.elements)
      else
        {:erro => { :mensagem => "Impossível contactar o servidor"}}
      end
    end
    
    def parse_elements(elements)
      map={}
      elements.each do |element|
        element_map = {}
        # ... FAZ ALGO COM OS ELEMENTOS DO XML ...
        map.merge!(element.name => element_map)
      end
      map.symbolize_keys
    end
  end
end