Function createRoute

scripts/createRoute.js:55–94

* @param {Express} app * @param {string} name * @param {string} route * @param {*} context * @param {ContextCache[]} dependantCaches * @returns

(app, name, route, context, dependantCaches)

 * @returns
 */
function createRoute(app, name, route, context, dependantCaches) {
  const cache = new ContextCache(context);
  app.get(route, async function (req, res, next) {
    const fileName = path.basename(req.originalUrl);

    // Multiple files may be requested at this path, calling this function in quick succession.
    // Await the previous build before re-building again.
    try {
      await cache.promise;
    } catch {
      // Error is reported upstream
    }

    if (!cache.isBuilt()) {
      try {
        const start = performance.now();
        if (dependantCaches) {
          await Promise.all(
            dependantCaches.map((dependantCache) => {
              if (!dependantCache.isBuilt()) {
                return dependantCache.rebuild();
              }
            }),
          );
        }
        await cache.rebuild();
        console.log(
          `Built ${name} in ${formatTimeSinceInSeconds(start)} seconds.`,
        );
      } catch (e) {
        next(e);
      }
    }

    const result = /** @type {BuildResult} */ (cache.result);
    return serveResult(result, fileName, res, next);
  });

  return cache;
}

export default createRoute;