# frozen_string_literal: true

# == SessionlessAuthentication
#
# Controller concern to handle PAT, RSS, and static objects token authentication methods
#
module SessionlessAuthentication
  # This filter handles personal access tokens, atom requests with rss tokens, and static object tokens
  def authenticate_sessionless_user!(request_format)
    user = request_authenticator.find_sessionless_user(request_format)
    sessionless_sign_in(user) if user
  end

  def request_authenticator
    @request_authenticator ||= Gitlab::Auth::RequestAuthenticator.new(request)
  end

  def sessionless_user?
    current_user && !session.key?('warden.user.user.key')
  end

  def sessionless_sign_in(user)
    signed_in_user =
      if user.can_log_in_with_non_expired_password?
        # Notice we are passing store false, so the user is not
        # actually stored in the session and a token is needed
        # for every request. If you want the token to work as a
        # sign in token, you can simply remove store: false.
        sign_in(user, store: false, message: :sessionless_sign_in)
      elsif request_authenticator.can_sign_in_bot?(user)
        # we suppress callbacks to avoid redirecting the bot
        sign_in(user, store: false, message: :sessionless_sign_in, run_callbacks: false)
      end

    reset_auth_user! if respond_to?(:reset_auth_user!, true)

    signed_in_user
  end

  def sessionless_bypass_admin_mode!(&block)
    return yield unless Gitlab::CurrentSettings.admin_mode

    Gitlab::Auth::CurrentUserMode.bypass_session!(current_user.id, &block)
  end
end