@shopify/shopify-app-remix/src/server/authenticate/admin/helpers/ensure-session-token-search-param-if-required.ts

Shopify Remix - to simplify the building of Shopify Apps with Remix

import {BasicParams} from '../../../types';

import {redirectToBouncePage} from './redirect-to-bounce-page';

const SESSION_TOKEN_PARAM = 'id_token';

export const ensureSessionTokenSearchParamIfRequired = async (
  params: BasicParams,
  request: Request,
) => {
  const {api, logger} = params;
  const url = new URL(request.url);

  const shop = url.searchParams.get('shop')!;
  const searchParamSessionToken = url.searchParams.get(SESSION_TOKEN_PARAM);
  const isEmbedded = url.searchParams.get('embedded') === '1';

  if (api.config.isEmbeddedApp && isEmbedded && !searchParamSessionToken) {
    logger.debug(
      'Missing session token in search params, going to bounce page',
      {shop},
    );
    redirectToBouncePage(params, url);
  }
};