# app/models/concerns/invoice_common.rb
module InvoiceCommon
    extend ActiveSupport::Concern
  
    included do
      include InvoiceHelper
  
      validates_presence_of :invoice_number
      validates_uniqueness_of :invoice_number
      validate :tax_number_set
  
      after_initialize :init, unless: :persisted?
    end
  
    def mark_sepa_downloaded
      self.sepa_downloaded = true
      save
    end
  
    def unmark_sepa_downloaded
      self.sepa_downloaded = false
      save
    end
  
    def name
      I18n.t("activerecord.attributes.#{self.class.name.underscore}.name") + "_#{invoice_number}"
    end
  
    def tax_number_set
      return if FoodsoftConfig[:contact][:tax_number].present?
      errors.add(:base, "Keine Steuernummer in FoodsoftConfig :contact gesetzt")
    end
  end