module Spree
  class Attachment < Spree::Asset
    ATTACHMENT_ATTRIBUTES = %i[alt attachment_content_type attachment_file_name
                               attachment_updated_at id position type].freeze
    PERMITTED_ATTACHMENT_ATTRIBUTES = %i[alt attachment position viewable_id viewable_type].freeze
    ALLOWED_CONTENT_TYPES = %w[application/pdf text/plain].freeze

    has_attached_file :attachment,
                      url: '/spree/attachments/:id/:basename.:extension',
                      path: 'spree/attachments/:id/:basename.:extension'

    validate :no_attachment_errors
    validates_attachment :attachment, content_type: { content_type: ALLOWED_CONTENT_TYPES }

    def no_attachment_errors
      errors.add :attachment, "Paperclip returned errors for file #{attachment_file_name}" if attachment.errors.any?
    end
  end
end