# 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 && @sessionless_sign_in # rubocop:disable Gitlab/ModuleWithInstanceVariables -- This is only used within this module
  end

  def sessionless_sign_in(user)
    @sessionless_sign_in = true # rubocop:disable Gitlab/ModuleWithInstanceVariables -- This is only used within this module

    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) || (user.composite_identity_enforced? &&
      !user.password_expired_if_applicable?)
      # we suppress callbacks to avoid redirecting the bot or a user with composite identity enforced
      sign_in(user, store: false, message: :sessionless_sign_in, run_callbacks: false)
    end
  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
