# frozen_string_literal: true

module Gitlab
  module IncomingEmail
    class << self
      include Gitlab::Email::Common

      def config
        incoming_email_config
      end

      def key_from_address(address, wildcard_address: nil)
        wildcard_address ||= config.address
        regex = address_regex(wildcard_address)
        return unless regex

        match = address.match(regex)
        return unless match

        match[1]
      end

      private

      def address_regex(wildcard_address)
        return unless wildcard_address

        regex = Regexp.escape(wildcard_address)
        regex = regex.sub(Regexp.escape(WILDCARD_PLACEHOLDER), '(.+)')
        Regexp.new(/\A<?#{regex}>?\z/).freeze
      end
    end
  end
end