account_update_policy.rb

# This calss decides whether or not we should attempt to update a credit
# card via the account updater
class CreditCard::AccountUpdatePolicy
  # Initializes the class
  # @param [CreditCard] credit_card The credit card we want to check for updating
  def initialize(credit_card)
    @credit_card = credit_card
  end

  # Determines if we should attempt to update this card 
  # @raise [StandardError] Raised if the credit card doesn't have it's transactions and orders loaded
  # @return [Boolean] Should we update the card or not
  def should_update?
    if (!Rails.env.production? && !Rails.env.staging?) && (!credit_card.transactions.loaded? || !credit_card.orders.loaded?) then
      raise StandardError.new("Please preload the transactions and orders for this credit card")
    end

    Setting.automatic_account_updates? &&
      created_before_threshold? &&
      updated_before_threshold? &&
      has_charged_order? &&
      allowed_brands?
  end

  private
  def created_before_threshold?
    @credit_card.created_at < threshold_date
  end

  def updated_before_threshold?
    @credit_card.transactions.detect { |t| t.human_readable_type == :account_updater && t.created_at > threshold_date }.nil?
  end
  
  def has_charged_order?
    @credit_card.orders.detect { |o| o.charged_at.present? }
  end

  def allowed_brands?
    @credit_card.brand == :visa || @credit_card.brand == :master
  end

  def threshold_date
    Time.now - ( Setting.account_updater_threshold || 10).days
  end

end