chore: migrate the event-types page to the app directory (#12390)

Co-authored-by: Omar López <zomars@me.com>

.env.example

@@ -283,3 +283,9 @@ E2E_TEST_OIDC_USER_EMAIL=
 E2E_TEST_OIDC_USER_PASSWORD=
 
 # ***********************************************************************************************************
+
+# provide a value between 0 and 100 to ensure the percentage of traffic
+# redirected from the legacy to the future pages
+AB_TEST_BUCKET_PROBABILITY=50
+# whether we redirect to the future/event-types from event-types or not
+APP_ROUTER_EVENT_TYPES_ENABLED=1

apps/web/abTest/middlewareFactory.ts

@@ -1,16 +1,21 @@
 import { getBucket } from "abTest/utils";
 import type { NextMiddleware, NextRequest } from "next/server";
-import { NextResponse } from "next/server";
+import { NextResponse, URLPattern } from "next/server";
 import z from "zod";
 
-const ROUTES: [RegExp, boolean][] = [
-  [/^\/event-types$/, Boolean(process.env.APP_ROUTER_EVENT_TYPES_ENABLED)],
-];
+const ROUTES: [URLPattern, boolean][] = [
+  ["/event-types", process.env.APP_ROUTER_EVENT_TYPES_ENABLED === "1"] as const,
+].map(([pathname, enabled]) => [
+  new URLPattern({
+    pathname,
+  }),
+  enabled,
+]);
 
 const FUTURE_ROUTES_OVERRIDE_COOKIE_NAME = "x-calcom-future-routes-override";
 const FUTURE_ROUTES_ENABLED_COOKIE_NAME = "x-calcom-future-routes-enabled";
 
-const bucketSchema = z.union([z.literal("legacy"), z.literal("future")]).default("legacy");
+const bucketSchema = z.union([z.literal("legacy"), z.literal("future")]);
 
 export const abTestMiddlewareFactory =
   (next: (req: NextRequest) => Promise<NextResponse<unknown>>): NextMiddleware =>
@@ -21,7 +26,7 @@ export const abTestMiddlewareFactory =
 
     const override = req.cookies.has(FUTURE_ROUTES_OVERRIDE_COOKIE_NAME);
 
-    const route = ROUTES.find(([regExp]) => regExp.test(pathname)) ?? null;
+    const route = ROUTES.find(([regExp]) => regExp.test(req.url)) ?? null;
 
     const enabled = route !== null ? route[1] || override : false;
 
@@ -35,16 +40,29 @@ export const abTestMiddlewareFactory =
 
     if (!safeParsedBucket.success) {
       // cookie does not exist or it has incorrect value
+      const bucket = getBucket();
 
-      const res = NextResponse.next(response);
-      res.cookies.set(FUTURE_ROUTES_ENABLED_COOKIE_NAME, getBucket(), { expires: 1000 * 60 * 30 }); // 30 min in ms
-      return res;
+      response.cookies.set(FUTURE_ROUTES_ENABLED_COOKIE_NAME, bucket, {
+        expires: Date.now() + 1000 * 60 * 30,
+        httpOnly: true,
+      }); // 30 min in ms
+
+      if (bucket === "legacy") {
+        return response;
+      }
+
+      const url = req.nextUrl.clone();
+      url.pathname = `future${pathname}/`;
+
+      return NextResponse.rewrite(url, response);
     }
 
-    const bucketUrlPrefix = safeParsedBucket.data === "future" ? "future" : "";
+    if (safeParsedBucket.data === "legacy") {
+      return response;
+    }
 
     const url = req.nextUrl.clone();
-    url.pathname = `${bucketUrlPrefix}${pathname}/`;
+    url.pathname = `future${pathname}/`;
 
     return NextResponse.rewrite(url, response);
   };

apps/web/app/_trpc/HydrateClient.tsx

@@ -0,0 +1,8 @@
+"use client";
+
+import { createHydrateClient } from "app/_trpc/createHydrateClient";
+import superjson from "superjson";
+
+export const HydrateClient = createHydrateClient({
+  transformer: superjson,
+});

apps/web/app/_trpc/client.ts

@@ -0,0 +1,5 @@
+import type { AppRouter } from "@calcom/trpc/server/routers/_app";
+
+import { createTRPCReact } from "@trpc/react-query";
+
+export const trpc = createTRPCReact<AppRouter>({});

apps/web/app/_trpc/createHydrateClient.tsx

@@ -0,0 +1,21 @@
+"use client";
+
+import { type DehydratedState, Hydrate } from "@tanstack/react-query";
+import { useMemo } from "react";
+
+import type { DataTransformer } from "@trpc/server";
+
+export function createHydrateClient(opts: { transformer?: DataTransformer }) {
+  return function HydrateClient(props: { children: React.ReactNode; state: DehydratedState }) {
+    const { state, children } = props;
+
+    const transformedState: DehydratedState = useMemo(() => {
+      if (opts.transformer) {
+        return opts.transformer.deserialize(state);
+      }
+      return state;
+    }, [state]);
+
+    return <Hydrate state={transformedState}>{children}</Hydrate>;
+  };
+}

apps/web/app/_trpc/trpc-provider.tsx

@@ -0,0 +1,128 @@
+import { type DehydratedState, QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { HydrateClient } from "app/_trpc/HydrateClient";
+import { trpc } from "app/_trpc/client";
+import { useState } from "react";
+import superjson from "superjson";
+
+import { httpBatchLink } from "@calcom/trpc/client/links/httpBatchLink";
+import { httpLink } from "@calcom/trpc/client/links/httpLink";
+import { loggerLink } from "@calcom/trpc/client/links/loggerLink";
+import { splitLink } from "@calcom/trpc/client/links/splitLink";
+
+const ENDPOINTS = [
+  "admin",
+  "apiKeys",
+  "appRoutingForms",
+  "apps",
+  "auth",
+  "availability",
+  "appBasecamp3",
+  "bookings",
+  "deploymentSetup",
+  "eventTypes",
+  "features",
+  "insights",
+  "payments",
+  "public",
+  "saml",
+  "slots",
+  "teams",
+  "organizations",
+  "users",
+  "viewer",
+  "webhook",
+  "workflows",
+  "appsRouter",
+  "googleWorkspace",
+] as const;
+export type Endpoint = (typeof ENDPOINTS)[number];
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const resolveEndpoint = (links: any) => {
+  // TODO: Update our trpc routes so they are more clear.
+  // This function parses paths like the following and maps them
+  // to the correct API endpoints.
+  // - viewer.me - 2 segment paths like this are for logged in requests
+  // - viewer.public.i18n - 3 segments paths can be public or authed
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  return (ctx: any) => {
+    const parts = ctx.op.path.split(".");
+    let endpoint;
+    let path = "";
+    if (parts.length == 2) {
+      endpoint = parts[0] as keyof typeof links;
+      path = parts[1];
+    } else {
+      endpoint = parts[1] as keyof typeof links;
+      path = parts.splice(2, parts.length - 2).join(".");
+    }
+    return links[endpoint]({ ...ctx, op: { ...ctx.op, path } });
+  };
+};
+
+export const TrpcProvider: React.FC<{ children: React.ReactNode; dehydratedState?: DehydratedState }> = ({
+  children,
+  dehydratedState,
+}) => {
+  const [queryClient] = useState(
+    () =>
+      new QueryClient({
+        defaultOptions: { queries: { staleTime: 5000 } },
+      })
+  );
+  const url =
+    typeof window !== "undefined"
+      ? "/api/trpc"
+      : process.env.VERCEL_URL
+      ? `https://${process.env.VERCEL_URL}/api/trpc`
+      : `${process.env.NEXT_PUBLIC_WEBAPP_URL}/api/trpc`;
+
+  const [trpcClient] = useState(() =>
+    trpc.createClient({
+      links: [
+        // adds pretty logs to your console in development and logs errors in production
+        loggerLink({
+          enabled: (opts) =>
+            !!process.env.NEXT_PUBLIC_DEBUG || (opts.direction === "down" && opts.result instanceof Error),
+        }),
+        splitLink({
+          // check for context property `skipBatch`
+          condition: (op) => !!op.context.skipBatch,
+          // when condition is true, use normal request
+          true: (runtime) => {
+            const links = Object.fromEntries(
+              ENDPOINTS.map((endpoint) => [
+                endpoint,
+                httpLink({
+                  url: `${url}/${endpoint}`,
+                })(runtime),
+              ])
+            );
+            return resolveEndpoint(links);
+          },
+          // when condition is false, use batch request
+          false: (runtime) => {
+            const links = Object.fromEntries(
+              ENDPOINTS.map((endpoint) => [
+                endpoint,
+                httpBatchLink({
+                  url: `${url}/${endpoint}`,
+                })(runtime),
+              ])
+            );
+            return resolveEndpoint(links);
+          },
+        }),
+      ],
+      transformer: superjson,
+    })
+  );
+
+  return (
+    <trpc.Provider client={trpcClient} queryClient={queryClient}>
+      <QueryClientProvider client={queryClient}>
+        {dehydratedState ? <HydrateClient state={dehydratedState}>{children}</HydrateClient> : children}
+      </QueryClientProvider>
+    </trpc.Provider>
+  );
+};

apps/web/app/_utils.tsx

@@ -0,0 +1,40 @@
+import { type TFunction } from "i18next";
+import { headers } from "next/headers";
+
+import { constructGenericImage } from "@calcom/lib/OgImages";
+import { IS_CALCOM, WEBAPP_URL, APP_NAME, SEO_IMG_OGIMG } from "@calcom/lib/constants";
+import { getFixedT } from "@calcom/lib/server/getFixedT";
+
+import { preparePageMetadata } from "@lib/metadata";
+
+export const _generateMetadata = async (
+  getTitle: (t: TFunction<string, undefined>) => string,
+  getDescription: (t: TFunction<string, undefined>) => string
+) => {
+  const h = headers();
+  const canonical = h.get("x-pathname") ?? "";
+  const locale = h.get("x-locale") ?? "en";
+
+  const t = await getFixedT(locale, "common");
+
+  const title = getTitle(t);
+  const description = getDescription(t);
+
+  const metadataBase = new URL(IS_CALCOM ? "https://cal.com" : WEBAPP_URL);
+
+  const image =
+    SEO_IMG_OGIMG +
+    constructGenericImage({
+      title,
+      description,
+    });
+
+  return preparePageMetadata({
+    title,
+    canonical,
+    image,
+    description,
+    siteName: APP_NAME,
+    metadataBase,
+  });
+};

apps/web/app/error.tsx

@@ -0,0 +1,64 @@
+"use client";
+
+/**
+ * Typescript class based component for custom-error
+ * @link https://nextjs.org/docs/advanced-features/custom-error-page
+ */
+import type { NextPage } from "next";
+import type { ErrorProps } from "next/error";
+import React from "react";
+
+import { HttpError } from "@calcom/lib/http-error";
+import logger from "@calcom/lib/logger";
+import { redactError } from "@calcom/lib/redactError";
+
+import { ErrorPage } from "@components/error/error-page";
+
+type NextError = Error & { digest?: string };
+
+// Ref: https://nextjs.org/docs/app/api-reference/file-conventions/error#props
+export type DefaultErrorProps = {
+  error: NextError;
+  reset: () => void; // A function to reset the error boundary
+};
+
+type AugmentedError = NextError | HttpError | null;
+
+type CustomErrorProps = {
+  err?: AugmentedError;
+  statusCode?: number;
+  message?: string;
+} & Omit<ErrorProps, "err" | "statusCode">;
+
+const log = logger.getSubLogger({ prefix: ["[error]"] });
+
+const CustomError: NextPage<DefaultErrorProps> = (props) => {
+  const { error } = props;
+  let errorObject: CustomErrorProps = {
+    message: error.message,
+    err: error,
+  };
+
+  if (error instanceof HttpError) {
+    const redactedError = redactError(error);
+    errorObject = {
+      statusCode: error.statusCode,
+      title: redactedError.name,
+      message: redactedError.message,
+      err: {
+        ...redactedError,
+        ...error,
+      },
+    };
+  }
+
+  // `error.digest` property contains an automatically generated hash of the error that can be used to match the corresponding error in server-side logs
+  log.debug(`${error?.toString() ?? JSON.stringify(error)}`);
+  log.info("errorObject: ", errorObject);
+
+  return (
+    <ErrorPage statusCode={errorObject.statusCode} error={errorObject.err} message={errorObject.message} />
+  );
+};
+
+export default CustomError;

apps/web/app/future/(shared-page-wrapper)/(layout)/event-types/page.tsx

@@ -0,0 +1,10 @@
+import EventTypes from "@pages/event-types";
+import { _generateMetadata } from "app/_utils";
+
+export const generateMetadata = async () =>
+  await _generateMetadata(
+    (t) => t("event_types_page_title"),
+    (t) => t("event_types_page_subtitle")
+  );
+
+export default EventTypes;

apps/web/app/future/(shared-page-wrapper)/(layout)/layout.tsx

@@ -0,0 +1,22 @@
+// pages without layout (e.g., /availability/index.tsx) are supposed to go under (layout) folder
+import { headers } from "next/headers";
+import { type ReactElement } from "react";
+
+import { getLayout } from "@calcom/features/MainLayoutAppDir";
+
+import PageWrapper from "@components/PageWrapperAppDir";
+
+type WrapperWithLayoutProps = {
+  children: ReactElement;
+};
+
+export default async function WrapperWithLayout({ children }: WrapperWithLayoutProps) {
+  const h = headers();
+  const nonce = h.get("x-nonce") ?? undefined;
+
+  return (
+    <PageWrapper getLayout={getLayout} requiresLicense={false} nonce={nonce} themeBasis={null}>
+      {children}
+    </PageWrapper>
+  );
+}

apps/web/app/global-error.tsx

@@ -0,0 +1,17 @@
+"use client";
+
+import { type NextPage } from "next";
+
+import CustomError, { type DefaultErrorProps } from "./error";
+
+export const GlobalError: NextPage<DefaultErrorProps> = (props) => {
+  return (
+    <html>
+      <body>
+        <CustomError {...props} />
+      </body>
+    </html>
+  );
+};
+
+export default GlobalError;

apps/web/app/layout.tsx

@@ -1,84 +1,63 @@
-import type { Metadata } from "next";
-import { headers as nextHeaders, cookies as nextCookies } from "next/headers";
+import { dir } from "i18next";
+import { headers, cookies } from "next/headers";
 import Script from "next/script";
 import React from "react";
 
 import { getLocale } from "@calcom/features/auth/lib/getLocale";
 import { IS_PRODUCTION } from "@calcom/lib/constants";
 
+import { prepareRootMetadata } from "@lib/metadata";
+
 import "../styles/globals.css";
 
-export const metadata: Metadata = {
-  icons: {
-    icon: [
-      {
-        sizes: "32x32",
-        url: "/api/logo?type=favicon-32",
-      },
-      {
-        sizes: "16x16",
-        url: "/api/logo?type=favicon-16",
-      },
-    ],
-    apple: {
-      sizes: "180x180",
-      url: "/api/logo?type=apple-touch-icon",
+export const generateMetadata = () =>
+  prepareRootMetadata({
+    twitterCreator: "@calcom",
+    twitterSite: "@calcom",
+    robots: {
+      index: false,
+      follow: false,
     },
-    other: [
-      {
-        url: "/safari-pinned-tab.svg",
-        rel: "mask-icon",
-      },
-    ],
-  },
-  manifest: "/site.webmanifest",
-  themeColor: [
-    { media: "(prefers-color-scheme: light)", color: "#f9fafb" },
-    { media: "(prefers-color-scheme: dark)", color: "#1C1C1C" },
-  ],
-  other: {
-    "msapplication-TileColor": "#000000",
-  },
-};
+  });
 
-const getInitialProps = async (
-  url: string,
-  headers: ReturnType<typeof nextHeaders>,
-  cookies: ReturnType<typeof nextCookies>
-) => {
+const getInitialProps = async (url: string) => {
   const { pathname, searchParams } = new URL(url);
 
   const isEmbed = pathname.endsWith("/embed") || (searchParams?.get("embedType") ?? null) !== null;
   const embedColorScheme = searchParams?.get("ui.color-scheme");
 
-  // @ts-expect-error we cannot access ctx.req in app dir, however headers and cookies are only properties needed to extract the locale
-  const newLocale = await getLocale({ headers, cookies });
-  let direction = "ltr";
-
-  try {
-    const intlLocale = new Intl.Locale(newLocale);
-    // @ts-expect-error INFO: Typescript does not know about the Intl.Locale textInfo attribute
-    direction = intlLocale.textInfo?.direction;
-  } catch (e) {
-    console.error(e);
-  }
+  const req = { headers: headers(), cookies: cookies() };
+  const newLocale = await getLocale(req);
+  const direction = dir(newLocale);
 
   return { isEmbed, embedColorScheme, locale: newLocale, direction };
 };
 
+const getFallbackProps = () => ({
+  locale: "en",
+  direction: "ltr",
+  isEmbed: false,
+  embedColorScheme: false,
+});
+
 export default async function RootLayout({ children }: { children: React.ReactNode }) {
-  const headers = nextHeaders();
-  const cookies = nextCookies();
+  const h = headers();
 
-  const fullUrl = headers.get("x-url") ?? "";
-  const nonce = headers.get("x-csp") ?? "";
+  const fullUrl = h.get("x-url") ?? "";
+  const nonce = h.get("x-csp") ?? "";
+
+  const isSSG = !fullUrl;
+
+  const { locale, direction, isEmbed, embedColorScheme } = isSSG
+    ? getFallbackProps()
+    : await getInitialProps(fullUrl);
 
-  const { locale, direction, isEmbed, embedColorScheme } = await getInitialProps(fullUrl, headers, cookies);
   return (
     <html
       lang={locale}
       dir={direction}
-      style={embedColorScheme ? { colorScheme: embedColorScheme as string } : undefined}>
+      style={embedColorScheme ? { colorScheme: embedColorScheme as string } : undefined}
+      data-nextjs-router="app">
       <head nonce={nonce}>
         {!IS_PRODUCTION && process.env.VERCEL_ENV === "preview" && (
           // eslint-disable-next-line @next/next/no-sync-scripts

apps/web/components/PageWrapperAppDir.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { type DehydratedState } from "@tanstack/react-query";
 import type { SSRConfig } from "next-i18next";
 import { Inter } from "next/font/google";
 import localFont from "next/font/local";
@@ -10,7 +11,6 @@ import type { ReactNode } from "react";
 
 import "@calcom/embed-core/src/embed-iframe";
 import LicenseRequired from "@calcom/features/ee/common/components/LicenseRequired";
-import { trpc } from "@calcom/trpc/react";
 
 import type { AppProps } from "@lib/app-providers-app-dir";
 import AppProviders from "@lib/app-providers-app-dir";
@@ -29,13 +29,14 @@ const calFont = localFont({
 });
 
 export type PageWrapperProps = Readonly<{
-  getLayout: (page: React.ReactElement) => ReactNode;
+  getLayout: ((page: React.ReactElement) => ReactNode) | null;
   children: React.ReactElement;
   requiresLicense: boolean;
-  isThemeSupported: boolean;
-  isBookingPage: boolean;
   nonce: string | undefined;
   themeBasis: string | null;
+  dehydratedState?: DehydratedState;
+  isThemeSupported?: boolean;
+  isBookingPage?: boolean;
   i18n?: SSRConfig;
 }>;
 
@@ -85,4 +86,4 @@ function PageWrapper(props: PageWrapperProps) {
   );
 }
 
-export default trpc.withTRPC(PageWrapper);
+export default PageWrapper;

apps/web/lib/app-providers-app-dir.tsx

@@ -1,4 +1,5 @@
 import { TooltipProvider } from "@radix-ui/react-tooltip";
+import { TrpcProvider } from "app/_trpc/trpc-provider";
 import { dir } from "i18next";
 import type { Session } from "next-auth";
 import { SessionProvider, useSession } from "next-auth/react";
@@ -255,26 +256,28 @@ const AppProviders = (props: PageWrapperProps) => {
   const isBookingPage = useIsBookingPage();
 
   const RemainingProviders = (
-    <EventCollectionProvider options={{ apiPath: "/api/collect-events" }}>
-      <SessionProvider>
-        <CustomI18nextProvider i18n={props.i18n}>
-          <TooltipProvider>
-            {/* color-scheme makes background:transparent not work which is required by embed. We need to ensure next-theme adds color-scheme to `body` instead of `html`(https://github.com/pacocoursey/next-themes/blob/main/src/index.tsx#L74). Once that's done we can enable color-scheme support */}
-            <CalcomThemeProvider
-              themeBasis={props.themeBasis}
-              nonce={props.nonce}
-              isThemeSupported={props.isThemeSupported}
-              isBookingPage={props.isBookingPage || isBookingPage}>
-              <FeatureFlagsProvider>
-                <OrgBrandProvider>
-                  <MetaProvider>{props.children}</MetaProvider>
-                </OrgBrandProvider>
-              </FeatureFlagsProvider>
-            </CalcomThemeProvider>
-          </TooltipProvider>
-        </CustomI18nextProvider>
-      </SessionProvider>
-    </EventCollectionProvider>
+    <TrpcProvider dehydratedState={props.dehydratedState}>
+      <EventCollectionProvider options={{ apiPath: "/api/collect-events" }}>
+        <SessionProvider>
+          <CustomI18nextProvider i18n={props.i18n}>
+            <TooltipProvider>
+              {/* color-scheme makes background:transparent not work which is required by embed. We need to ensure next-theme adds color-scheme to `body` instead of `html`(https://github.com/pacocoursey/next-themes/blob/main/src/index.tsx#L74). Once that's done we can enable color-scheme support */}
+              <CalcomThemeProvider
+                themeBasis={props.themeBasis}
+                nonce={props.nonce}
+                isThemeSupported={/* undefined gets treated as true */ props.isThemeSupported ?? true}
+                isBookingPage={props.isBookingPage || isBookingPage}>
+                <FeatureFlagsProvider>
+                  <OrgBrandProvider>
+                    <MetaProvider>{props.children}</MetaProvider>
+                  </OrgBrandProvider>
+                </FeatureFlagsProvider>
+              </CalcomThemeProvider>
+            </TooltipProvider>
+          </CustomI18nextProvider>
+        </SessionProvider>
+      </EventCollectionProvider>
+    </TrpcProvider>
   );
 
   if (isBookingPage) {

apps/web/lib/metadata.ts

@@ -0,0 +1,83 @@
+import type { Metadata } from "next";
+
+import { truncateOnWord } from "@calcom/lib/text";
+
+type RootMetadataRecipe = Readonly<{
+  twitterCreator: string;
+  twitterSite: string;
+  robots: {
+    index: boolean;
+    follow: boolean;
+  };
+}>;
+
+export type PageMetadataRecipe = Readonly<{
+  title: string;
+  canonical: string;
+  image: string;
+  description: string;
+  siteName: string;
+  metadataBase: URL;
+}>;
+
+export const prepareRootMetadata = (recipe: RootMetadataRecipe): Metadata => ({
+  icons: {
+    icon: "/favicon.icon",
+    apple: "/api/logo?type=apple-touch-icon",
+    other: [
+      {
+        rel: "icon-mask",
+        url: "/safari-pinned-tab.svg",
+        // @ts-expect-error TODO available in the never Next.js version
+        color: "#000000",
+      },
+      {
+        url: "/api/logo?type=favicon-16",
+        sizes: "16x16",
+        type: "image/png",
+      },
+      {
+        url: "/api/logo?type=favicon-32",
+        sizes: "32x32",
+        type: "image/png",
+      },
+    ],
+  },
+  manifest: "/site.webmanifest",
+  viewport: "width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0",
+  robots: recipe.robots,
+  other: {
+    "application-TileColor": "#ff0000",
+  },
+  themeColor: [
+    {
+      media: "(prefers-color-scheme: light)",
+      color: "#f9fafb",
+    },
+    {
+      media: "(prefers-color-scheme: dark)",
+      color: "#1C1C1C",
+    },
+  ],
+  twitter: {
+    site: recipe.twitterSite,
+    creator: recipe.twitterCreator,
+    card: "summary_large_image",
+  },
+});
+
+export const preparePageMetadata = (recipe: PageMetadataRecipe): Metadata => ({
+  title: recipe.title,
+  alternates: {
+    canonical: recipe.canonical,
+  },
+  openGraph: {
+    description: truncateOnWord(recipe.description, 158),
+    url: recipe.canonical,
+    type: "website",
+    siteName: recipe.siteName,
+    title: recipe.title,
+    images: [recipe.image],
+  },
+  metadataBase: recipe.metadataBase,
+});

apps/web/middleware.ts

@@ -1,13 +1,16 @@
 import { get } from "@vercel/edge-config";
 import { collectEvents } from "next-collect/server";
-import type { NextMiddleware } from "next/server";
+import type { NextRequest } from "next/server";
 import { NextResponse } from "next/server";
 
+import { getLocale } from "@calcom/features/auth/lib/getLocale";
 import { extendEventData, nextCollectBasicSettings } from "@calcom/lib/telemetry";
 
 import { csp } from "@lib/csp";
 
-const middleware: NextMiddleware = async (req) => {
+import { abTestMiddlewareFactory } from "./abTest/middlewareFactory";
+
+const middleware = async (req: NextRequest): Promise<NextResponse<unknown>> => {
   const url = req.nextUrl;
   const requestHeaders = new Headers(req.headers);
 
@@ -61,6 +64,12 @@ const middleware: NextMiddleware = async (req) => {
     requestHeaders.set("x-csp-enforce", "true");
   }
 
+  requestHeaders.set("x-pathname", url.pathname);
+
+  const locale = await getLocale(req);
+
+  requestHeaders.set("x-locale", locale);
+
   return NextResponse.next({
     request: {
       headers: requestHeaders,
@@ -90,11 +99,13 @@ export const config = {
      * Paths required by routingForms.handle
      */
     "/apps/routing_forms/:path*",
+    "/event-types",
+    "/future/event-types/",
   ],
 };
 
 export default collectEvents({
-  middleware,
+  middleware: abTestMiddlewareFactory(middleware),
   ...nextCollectBasicSettings,
   cookieName: "__clnds",
   extend: extendEventData,

apps/web/pages/event-types/index.tsx

@@ -1,3 +1,5 @@
+"use client";
+
 import { useAutoAnimate } from "@formkit/auto-animate/react";
 import type { User } from "@prisma/client";
 import { Trans } from "next-i18next";

apps/web/playwright/event-types.e2e.ts

@@ -5,16 +5,47 @@ import { WEBAPP_URL } from "@calcom/lib/constants";
 import { randomString } from "@calcom/lib/random";
 
 import { test } from "./lib/fixtures";
+import { testBothFutureAndLegacyRoutes } from "./lib/future-legacy-routes";
 import { bookTimeSlot, createNewEventType, selectFirstAvailableTimeSlotNextMonth } from "./lib/testUtils";
 
 test.describe.configure({ mode: "parallel" });
 
+test.describe("Event Types A/B tests", () => {
+  test("should point to the /future/event-types page", async ({ page, users, context }) => {
+    await context.addCookies([
+      {
+        name: "x-calcom-future-routes-override",
+        value: "1",
+        url: "http://localhost:3000",
+      },
+    ]);
+    const user = await users.create();
+
+    await user.apiLogin();
+
+    await page.goto("/event-types");
+
+    await page.waitForLoadState();
+
+    const dataNextJsRouter = await page.evaluate(() =>
+      window.document.documentElement.getAttribute("data-nextjs-router")
+    );
+
+    expect(dataNextJsRouter).toEqual("app");
+
+    const locator = page.getByRole("heading", { name: "Event Types" });
+
+    await expect(locator).toBeVisible();
+  });
+});
+
 test.describe("Event Types tests", () => {
-  test.describe("user", () => {
+  testBothFutureAndLegacyRoutes.describe("user", () => {
     test.beforeEach(async ({ page, users }) => {
       const user = await users.create();
       await user.apiLogin();
       await page.goto("/event-types");
+
       // We wait until loading is finished
       await page.waitForSelector('[data-testid="event-types"]');
     });

apps/web/playwright/lib/future-legacy-routes.ts

@@ -0,0 +1,33 @@
+import { test } from "./fixtures";
+
+export type RouteVariant = "future" | "legacy";
+
+const routeVariants = ["future", "legacy"];
+
+/**
+ * Small wrapper around test.describe().
+ * When using testbothFutureLegacyRoutes.describe() instead of test.describe(), this will run the specified
+ * tests twice. One with the pages route, and one with the new app dir "future" route. It will also add the route variant
+ * name to the test name for easier debugging.
+ * Finally it also adds a parameter routeVariant to your testBothFutureAndLegacyRoutes.describe() callback, which
+ * can be used to do any conditional rendering in the test for a specific route variant (should be as little
+ * as possible).
+ *
+ * See apps/web/playwright/event-types.e2e.ts for an example.
+ */
+export const testBothFutureAndLegacyRoutes = {
+  describe: (testName: string, testFn: (routeVariant: RouteVariant) => void) => {
+    routeVariants.forEach((routeVariant) => {
+      test.describe(`${testName} -- ${routeVariant}`, () => {
+        if (routeVariant === "future") {
+          test.beforeEach(({ context }) => {
+            context.addCookies([
+              { name: "x-calcom-future-routes-override", value: "1", url: "http://localhost:3000" },
+            ]);
+          });
+        }
+        testFn(routeVariant as RouteVariant);
+      });
+    });
+  },
+};

apps/web/tsconfig.json

@@ -5,6 +5,7 @@
     "paths": {
       "~/*": ["modules/*"],
       "@components/*": ["components/*"],
+      "@pages/*": ["pages/*"],
       "@lib/*": ["lib/*"],
       "@server/*": ["server/*"],
       "@prisma/client/*": ["@calcom/prisma/client/*"]

packages/features/MainLayoutAppDir.tsx

@@ -0,0 +1,19 @@
+"use client";
+
+import type { ComponentProps } from "react";
+import React from "react";
+
+import Shell from "@calcom/features/shell/Shell";
+
+export default function MainLayout({
+  children,
+  ...rest
+}: { children: React.ReactNode } & ComponentProps<typeof Shell>) {
+  return (
+    <Shell withoutMain={true} {...rest}>
+      {children}
+    </Shell>
+  );
+}
+
+export const getLayout = (page: React.ReactElement) => <MainLayout>{page}</MainLayout>;

packages/features/auth/lib/getLocale.ts

@@ -2,9 +2,11 @@ import { parse } from "accept-language-parser";
 import { lookup } from "bcp-47-match";
 import type { GetTokenParams } from "next-auth/jwt";
 import { getToken } from "next-auth/jwt";
+import { type ReadonlyHeaders } from "next/dist/server/web/spec-extension/adapters/headers";
+import { type ReadonlyRequestCookies } from "next/dist/server/web/spec-extension/adapters/request-cookies";
 
 //@ts-expect-error no type definitions
-import { i18n } from "@calcom/web/next-i18next.config";
+import { i18n } from "@calcom/config/next-i18next.config";
 
 /**
  * This is a slimmed down version of the `getServerSession` function from
@@ -17,9 +19,16 @@ import { i18n } from "@calcom/web/next-i18next.config";
  * token has expired (30 days). This should be fine as we call `/auth/session`
  * frequently enough on the client-side to keep the session alive.
  */
-export const getLocale = async (req: GetTokenParams["req"]): Promise<string> => {
+export const getLocale = async (
+  req:
+    | GetTokenParams["req"]
+    | {
+        cookies: ReadonlyRequestCookies;
+        headers: ReadonlyHeaders;
+      }
+): Promise<string> => {
   const token = await getToken({
-    req,
+    req: req as GetTokenParams["req"],
   });
 
   const tokenLocale = token?.["locale"];

packages/lib/constants.ts

@@ -106,4 +106,11 @@ export const APP_CREDENTIAL_SHARING_ENABLED =
 
 export const DEFAULT_LIGHT_BRAND_COLOR = "#292929";
 export const DEFAULT_DARK_BRAND_COLOR = "#fafafa";
-export const AB_TEST_BUCKET_PROBABILITY = Number(process.env.AB_TEST_BUCKET_PROBABILITY ?? "10");
+
+const defaultOnNaN = (testedValue: number, defaultValue: number) =>
+  !Number.isNaN(testedValue) ? testedValue : defaultValue;
+
+export const AB_TEST_BUCKET_PROBABILITY = defaultOnNaN(
+  parseInt(process.env.AB_TEST_BUCKET_PROBABILITY ?? "10", 10),
+  10
+);

packages/lib/server/getFixedT.ts

@@ -0,0 +1,23 @@
+import i18next from "i18next";
+import { serverSideTranslations } from "next-i18next/serverSideTranslations";
+
+//@ts-expect-error no type definitions
+import config from "@calcom/web/next-i18next.config";
+
+export const create = async (locale: string, ns: string) => {
+  const { _nextI18Next } = await serverSideTranslations(locale, [ns], config);
+
+  const _i18n = i18next.createInstance();
+  _i18n.init({
+    lng: locale,
+    resources: _nextI18Next?.initialI18nStore,
+    fallbackLng: _nextI18Next?.userConfig?.i18n.defaultLocale,
+  });
+  return _i18n;
+};
+
+export const getFixedT = async (locale: string, ns: string) => {
+  const i18n = await create(locale, ns);
+
+  return i18n.getFixedT(locale, ns);
+};