gistfile1.rb

{ send_for_approval: "sent for approval",
    deactivate:        "deactivated",
    reactivate:        "reactivated",
  }.each do |status, desc|
    define_method status do
      if @offer.send(status)
        redirect_to @offer, :notice => "Offer was #{desc}."
      else
        render :action => "edit"
      end
    end
  end

def send_for_approval
  change_state(@offer.send_for_approval, 'sent for approval')
end

def deactivate
  change_state(@offer.deactivate, 'deactivated')
end

def reactivate
  change_state(@offer.reactivate, 'reactivated')
end

private

def change_state(result, snippet)
  if result
    redirect_to @offer, :notice => "Offer was #{snippet}"
  else
    render :action => "edit"
  end
end