get-settings-endpoint.js

  router.get("/settings", async (ctx) => {
    const session = await Shopify.Utils.loadCurrentSession(ctx.req, ctx.res);
    const shop = session.shop;

    // This shop hasn't been seen yet, go through OAuth to create a session
    if (session === undefined || ACTIVE_SHOPIFY_SHOPS[shop] === undefined) {
      ctx.redirect(`/auth?shop=${shop}`);
      return;
    }

    const shopSettings = ACTIVE_SHOPIFY_SHOPS[shop].settings;

    if (!shopSettings.productId) {
      ctx.status = 200;
      ctx.body = {
        status: "EMPTY_SETTINGS",
        data: undefined,
      };
      return;
    }

    const client = new Shopify.Clients.Rest(session.shop, session.accessToken);

    const productDetails = await client.get({
      path: `products/${shopSettings.productId}`,
      type: DataType.JSON,
    });

    ctx.body = {
      status: "OK_SETTINGS",
      data: productDetails.body.product,
    };
    ctx.status = 200;
  });