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path: root/app/controllers/concerns/known_sign_in.rb
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# frozen_string_literal: true

module KnownSignIn
  include Gitlab::Utils::StrongMemoize
  include CookiesHelper

  KNOWN_SIGN_IN_COOKIE = :known_sign_in
  KNOWN_SIGN_IN_COOKIE_EXPIRY = 14.days

  private

  def verify_known_sign_in
    return unless Gitlab::CurrentSettings.notify_on_unknown_sign_in? && current_user

    notify_user unless known_device? || known_remote_ip?

    update_cookie
  end

  def known_remote_ip?
    known_ip_addresses.include?(request.remote_ip)
  end

  def known_device?
    cookies.encrypted[KNOWN_SIGN_IN_COOKIE] == current_user.id
  end

  def update_cookie
    set_secure_cookie(KNOWN_SIGN_IN_COOKIE, current_user.id,
                      type: COOKIE_TYPE_ENCRYPTED, httponly: true, expires: KNOWN_SIGN_IN_COOKIE_EXPIRY)
  end

  def sessions
    strong_memoize(:session) do
      ActiveSession.list(current_user).reject(&:is_impersonated)
    end
  end

  def known_ip_addresses
    [current_user.last_sign_in_ip, sessions.map(&:ip_address)].flatten
  end

  def notify_user
    current_user.notification_service.unknown_sign_in(current_user, request.remote_ip, current_user.current_sign_in_at)
  end
end