Remove a part of next README.md that throw error on build test

packages/next/README.md

@@ -27,7 +27,7 @@ This package provides a simple way to integrate [Fedify] with [Next.js].
 Usage
 -----
 
-~~~~ typescript
+~~~~ typescript ignore
 // --- middleware.ts ---
 import { fedifyWith } from "@fedify/next";
 import { federation } from "./federation";
@@ -63,164 +63,3 @@ export const config = {
   ],
 };
 ~~~~
-
-The integration code looks like this:
-
-~~~~ typescript
-/**
- * Fedify with Next.js
- * ===================
- *
- * This module provides a [Next.js] middleware to integrate with the Fedify.
- *
- * [Next.js]: https://nextjs.org/
- *
- * @module
- * @since 1.9.0
- */
-import type { Federation, FederationFetchOptions } from "@fedify/fedify";
-import { notFound } from "next/navigation";
-import { NextResponse } from "next/server";
-import { getXForwardedRequest } from "x-forwarded-fetch";
-
-interface ContextDataFactory<TContextData> {
-  (request: Request):
-    | TContextData
-    | Promise<TContextData>;
-}
-type ErrorHandlers = Omit<FederationFetchOptions<unknown>, "contextData">;
-
-/**
- * Wrapper function for Next.js middleware to integrate with the
- * {@link Federation} object.
- *
- * @template TContextData A type of the context data for the
- *                         {@link Federation} object.
- * @param federation A {@link Federation} object to integrate with Next.js.
- * @param contextDataFactory A function to create a context data for the
- *                         {@link Federation} object.
- * @param errorHandlers A set of error handlers to handle errors during
- *                      the federation fetch.
- * @returns A Next.js middleware function to integrate with the
- *          {@link Federation} object.
- *
- * @example
- * ```ts
- * import { fedifyWith } from "@fedify/next";
- * import { federation } from "./federation";
- *
- * export default fedifyWith(federation)(
- *   function (request: Request) {
- *     // You can add custom logic here for other requests
- *     // except federation requests.  If there is no custom logic,
- *     // you can omit this function.
- *   }
- * )
- *
- * // This config makes middleware process only requests with the
- * // "Accept" header matching the federation accept regex.
- * // More details: https://nextjs.org/docs/app/api-reference/file-conventions/middleware#config-object-optional.
- * export const config = {
- *   runtime: "nodejs",
- *   matcher: [
- *     {
- *       source: "/:path*",
- *       has: [
- *         {
- *           type: "header",
- *           key: "Accept",
- *           value: ".*application\\/((jrd|activity|ld)\\+json|xrd\\+xml).*",
- *         },
- *       ],
- *     },
- *     {
- *       source: "/:path*",
- *       has: [
- *         {
- *           type: "header",
- *           key: "content-type",
- *           value: ".*application\\/((jrd|activity|ld)\\+json|xrd\\+xml).*",
- *         },
- *       ],
- *     },
- *     { source: "/.well-known/nodeinfo" },
- *     { source: "/.well-known/x-nodeinfo2" },
- *   ],
- * };
- * ```
- */
-export const fedifyWith = <TContextData>(
-  federation: Federation<TContextData>,
-  contextDataFactory?: ContextDataFactory<TContextData>,
-  errorHandlers?: Partial<ErrorHandlers>,
-) =>
-(
-  middleware: (request: Request) => unknown =
-    ((_: Request) => NextResponse.next()),
-): (request: Request) => unknown =>
-async (request: Request) => {
-  if (hasFederationAcceptHeader(request)) {
-    return await integrateFederation(
-      federation,
-      contextDataFactory,
-      errorHandlers,
-    )(request);
-  }
-  return await middleware(request);
-};
-
-/**
- * Check if the request has the "Accept" header matching the federation
- * accept regex.
- *
- * @param {Request} request The request to check.
- * @returns {boolean} `true` if the request has the "Accept" header matching
- *                    the federation accept regex, `false` otherwise.
- */
-export const hasFederationAcceptHeader = (request: Request): boolean => {
-  const acceptHeader = request.headers.get("Accept");
-  // Check if the Accept header matches the federation accept regex.
-  // If the header is not present, return false.
-  return acceptHeader ? FEDERATION_ACCEPT_REGEX.test(acceptHeader) : false;
-};
-const FEDERATION_ACCEPT_REGEX =
-  /.*application\/((jrd|activity|ld)\+json|xrd\+xml).*/;
-
-/**
- * Create a Next.js handler to integrate with the {@link Federation} object.
- *
- * @template TContextData A type of the context data for the
- *                        {@link Federation} object.
- * @param federation A {@link Federation} object to integrate with Next.js.
- * @param contextDataFactory A function to create a context data for the
- *                           {@link Federation} object.
- * @param errorHandlers A set of error handlers to handle errors during
- *                      the federation fetch.
- * @returns A Next.js handler.
- */
-export function integrateFederation<TContextData>(
-  federation: Federation<TContextData>,
-  contextDataFactory: ContextDataFactory<TContextData> = () =>
-    undefined as TContextData,
-  errorHandlers?: Partial<ErrorHandlers>,
-) {
-  return async (request: Request) => {
-    const forwardedRequest = await getXForwardedRequest(request);
-    const contextData = await contextDataFactory(forwardedRequest);
-    return await federation.fetch(
-      forwardedRequest,
-      {
-        contextData,
-        onNotFound: notFound,
-        onNotAcceptable,
-        ...errorHandlers,
-      },
-    );
-  };
-}
-const onNotAcceptable = () =>
-  new Response("Not acceptable", {
-    status: 406,
-    headers: { "Content-Type": "text/plain", Vary: "Accept" },
-  });
-~~~~