Changed from static to 11ty!

1 files changed, 1024 insertions, 0 deletions

diff --git a/node_modules/@11ty/eleventy-dev-server/server.js b/node_modules/@11ty/eleventy-dev-server/server.js
new file mode 100644
index 0000000..9fbe898
--- /dev/null
+++ b/node_modules/@11ty/eleventy-dev-server/server.js
@@ -0,0 +1,1024 @@
+const path = require("node:path");
+const fs = require("node:fs");
+
+const finalhandler = require("finalhandler");
+const WebSocket = require("ws");
+const { WebSocketServer } = WebSocket;
+const mime = require("mime");
+const ssri = require("ssri");
+const send = require("send");
+const chokidar = require("chokidar");
+const { TemplatePath, isPlainObject } = require("@11ty/eleventy-utils");
+
+const debug = require("debug")("Eleventy:DevServer");
+
+const pkg = require("./package.json");
+const wrapResponse = require("./server/wrapResponse.js");
+const ipAddress = require("./server/ipAddress.js");
+
+if (!globalThis.URLPattern) {
+  require("urlpattern-polyfill");
+}
+
+const DEFAULT_OPTIONS = {
+  port: 8080,
+  reloadPort: false,    // Falsy uses same as `port`
+  liveReload: true,     // Enable live reload at all
+  showAllHosts: false,  // IP address based hosts (other than localhost)
+  injectedScriptsFolder: ".11ty", // Change the name of the special folder used for injected scripts
+  portReassignmentRetryCount: 10, // number of times to increment the port if in use
+  https: {},            // `key` and `cert`, required for http/2 and https
+  domDiff: true,        // Use morphdom to apply DOM diffing delta updates to HTML
+  showVersion: false,   // Whether or not to show the server version on the command line.
+  encoding: "utf-8",    // Default file encoding
+  pathPrefix: "/",      // May be overridden by Eleventy, adds a virtual base directory to your project
+  watch: [],            // Globs to pass to separate dev server chokidar for watching
+  aliases: {},          // Aliasing feature
+  indexFileName: "index.html", // Allow custom index file name
+  useCache: false,      // Use a cache for file contents
+  headers: {},          // Set default response headers
+  messageOnStart: ({ hosts, startupTime, version, options }) => {
+    let hostsStr = " started";
+    if(Array.isArray(hosts) && hosts.length > 0) {
+      // TODO what happens when the cert doesn’t cover non-localhost hosts?
+      hostsStr = ` at ${hosts.join(" or ")}`;
+    }
+
+    return `Server${hostsStr}${options.showVersion ? ` (v${version})` : ""}`;
+  },
+
+  onRequest: {},        // Maps URLPatterns to dynamic callback functions that run on a request from a client.
+
+  // Example:
+  // "/foo/:name": function({ url, pattern, patternGroups }) {
+  //   return {
+  //     headers: {
+  //       "Content-Type": "text/html",
+  //     },
+  //     body: `${url} ${JSON.stringify(patternGroups)}`
+  //   }
+  // }
+
+  // Logger (fancier one is injected by Eleventy)
+  logger: {
+    info: console.log,
+    log: console.log,
+    error: console.error,
+  }
+}
+
+class EleventyDevServer {
+  #watcher;
+  #serverClosing;
+  #serverState;
+  #readyPromise;
+  #readyResolve;
+
+  static getServer(...args) {
+    return new EleventyDevServer(...args);
+  }
+
+  constructor(name, dir, options = {}) {
+    debug("Creating new Dev Server instance.")
+    this.name = name;
+    this.normalizeOptions(options);
+
+    this.fileCache = {};
+    // Directory to serve
+    if(!dir) {
+      throw new Error("Missing `dir` to serve.");
+    }
+    this.dir = dir;
+    this.logger = this.options.logger;
+    this.getWatcher();
+
+    this.#readyPromise = new Promise((resolve) => {
+      this.#readyResolve = resolve;
+    })
+  }
+
+  normalizeOptions(options = {}) {
+    this.options = Object.assign({}, DEFAULT_OPTIONS, options);
+
+    // better names for options https://github.com/11ty/eleventy-dev-server/issues/41
+    if(options.folder !== undefined) {
+      this.options.injectedScriptsFolder = options.folder;
+      delete this.options.folder;
+    }
+    if(options.domdiff !== undefined) {
+      this.options.domDiff = options.domdiff;
+      delete this.options.domdiff;
+    }
+    if(options.enabled !== undefined) {
+      this.options.liveReload = options.enabled;
+      delete this.options.enabled;
+    }
+
+    this.options.pathPrefix = this.cleanupPathPrefix(this.options.pathPrefix);
+  }
+
+  get watcher() {
+    if(this.#watcher) {
+      return this.#watcher;
+    }
+
+    debug("Watching %O", this.options.watch);
+    // TODO if using Eleventy and `watch` option includes output folder (_site) this will trigger two update events!
+    this.#watcher = chokidar.watch(this.options.watch, {
+      // TODO allow chokidar configuration extensions (or re-use the ones in Eleventy)
+
+      ignored: ["**/node_modules/**", ".git"],
+      ignoreInitial: true,
+
+      // same values as Eleventy
+      awaitWriteFinish: {
+        stabilityThreshold: 150,
+        pollInterval: 25,
+      },
+    });
+
+    this.#watcher.on("change", (path) => {
+      this.logger.log( `File changed: ${path} (skips build)` );
+      this.reloadFiles([path]);
+    });
+
+    this.#watcher.on("add", (path) => {
+      this.logger.log( `File added: ${path} (skips build)` );
+      this.reloadFiles([path]);
+    });
+
+    return this.#watcher;
+  }
+
+  getWatcher() {
+    // only initialize watcher if watcher via getWatcher if has targets
+    // this.watcher in watchFiles() is a manual workaround
+    if(this.options.watch.length > 0) {
+      return this.watcher;
+    }
+  }
+
+  watchFiles(files) {
+    if(Array.isArray(files) && files.length > 0) {
+      files = files.map(entry => TemplatePath.stripLeadingDotSlash(entry));
+
+      debug("Also watching %O", files);
+      this.watcher.add(files);
+    }
+  }
+
+  cleanupPathPrefix(pathPrefix) {
+    if(!pathPrefix || pathPrefix === "/") {
+      return "/";
+    }
+    if(!pathPrefix.startsWith("/")) {
+      pathPrefix = `/${pathPrefix}`
+    }
+    if(!pathPrefix.endsWith("/")) {
+      pathPrefix = `${pathPrefix}/`;
+    }
+    return pathPrefix;
+  }
+
+  // Allowed list of files that can be served from outside `dir`
+  setAliases(aliases) {
+    if(aliases) {
+      this.passthroughAliases = aliases;
+      debug( "Setting aliases (emulated passthrough copy) %O", aliases );
+    }
+  }
+
+  matchPassthroughAlias(url) {
+    let aliases = Object.assign({}, this.options.aliases, this.passthroughAliases);
+    for(let targetUrl in aliases) {
+      if(!targetUrl) {
+        continue;
+      }
+
+      let file = aliases[targetUrl];
+      if(url.startsWith(targetUrl)) {
+        let inputDirectoryPath = file + url.slice(targetUrl.length);
+
+        // e.g. addPassthroughCopy("img/") but <img src="/img/built/IdthKOzqFA-350.png">
+        // generated by the image plugin (written to the output folder)
+        // If they do not exist in the input directory, this will fallback to the output directory.
+        if(fs.existsSync(inputDirectoryPath)) {
+          return inputDirectoryPath;
+        }
+      }
+    }
+    return false;
+  }
+
+  isFileInDirectory(dir, file) {
+    let absoluteDir = TemplatePath.absolutePath(dir);
+    let absoluteFile = TemplatePath.absolutePath(file);
+    return absoluteFile.startsWith(absoluteDir);
+  }
+
+  getOutputDirFilePath(filepath, filename = "") {
+    let computedPath;
+    if(filename === ".html") {
+      // avoid trailing slash for filepath/.html requests
+      let prefix = path.join(this.dir, filepath);
+      if(prefix.endsWith(path.sep)) {
+        prefix = prefix.substring(0, prefix.length - path.sep.length);
+      }
+      computedPath = prefix + filename;
+    } else {
+      computedPath = path.join(this.dir, filepath, filename);
+    }
+
+    computedPath = decodeURIComponent(computedPath);
+
+    if(!filename) { // is a direct URL request (not an implicit .html or index.html add)
+      let alias = this.matchPassthroughAlias(filepath);
+
+      if(alias) {
+        if(!this.isFileInDirectory(path.resolve("."), alias)) {
+          throw new Error("Invalid path");
+        }
+
+        return alias;
+      }
+    }
+
+    // Check that the file is in the output path (error if folks try use `..` in the filepath)
+    if(!this.isFileInDirectory(this.dir, computedPath)) {
+      throw new Error("Invalid path");
+    }
+
+    return computedPath;
+  }
+
+  isOutputFilePathExists(rawPath) {
+    return fs.existsSync(rawPath) && !TemplatePath.isDirectorySync(rawPath);
+  }
+
+  /* Use conventions documented here https://www.zachleat.com/web/trailing-slash/
+   * resource.html exists:
+   *    /resource matches
+   *    /resource/ redirects to /resource
+   * resource/index.html exists:
+   *    /resource redirects to /resource/
+   *    /resource/ matches
+   * both resource.html and resource/index.html exists:
+   *    /resource matches /resource.html
+   *    /resource/ matches /resource/index.html
+   */
+  mapUrlToFilePath(url) {
+    // Note: `localhost` is not important here, any host would work
+    let u = new URL(url, "http://localhost/");
+    url = u.pathname;
+
+    // Remove PathPrefix from start of URL
+    if (this.options.pathPrefix !== "/") {
+      // Requests to root should redirect to new pathPrefix
+      if(url === "/") {
+        return {
+          statusCode: 302,
+          url: this.options.pathPrefix,
+        }
+      }
+
+      // Requests to anything outside of root should fail with 404
+      if (!url.startsWith(this.options.pathPrefix)) {
+        return {
+          statusCode: 404,
+        };
+      }
+
+      url = url.slice(this.options.pathPrefix.length - 1);
+    }
+
+    let rawPath = this.getOutputDirFilePath(url);
+    if (this.isOutputFilePathExists(rawPath)) {
+      return {
+        statusCode: 200,
+        filepath: rawPath,
+      };
+    }
+
+    let indexHtmlPath = this.getOutputDirFilePath(url, this.options.indexFileName);
+    let indexHtmlExists = fs.existsSync(indexHtmlPath);
+
+    let htmlPath = this.getOutputDirFilePath(url, ".html");
+    let htmlExists = fs.existsSync(htmlPath);
+
+    // /resource/ => /resource/index.html
+    if (indexHtmlExists && url.endsWith("/")) {
+      return {
+        statusCode: 200,
+        filepath: indexHtmlPath,
+      };
+    }
+    // /resource => resource.html
+    if (htmlExists && !url.endsWith("/")) {
+      return {
+        statusCode: 200,
+        filepath: htmlPath,
+      };
+    }
+
+    // /resource => redirect to /resource/
+    if (indexHtmlExists && !url.endsWith("/")) {
+      return {
+        statusCode: 301,
+        url: u.pathname + "/",
+      };
+    }
+
+    // /resource/ => redirect to /resource
+    if (htmlExists && url.endsWith("/")) {
+      return {
+        statusCode: 301,
+        url: u.pathname.substring(0, u.pathname.length - 1),
+      };
+    }
+
+    return {
+      statusCode: 404,
+    };
+  }
+
+  #readFile(filepath) {
+    if(this.options.useCache && this.fileCache[filepath]) {
+      return this.fileCache[filepath];
+    }
+
+    let contents = fs.readFileSync(filepath, {
+      encoding: this.options.encoding,
+    });
+
+    if(this.options.useCache) {
+      this.fileCache[filepath] = contents;
+    }
+
+    return contents;
+  }
+
+  #getFileContents(localpath, rootDir) {
+    let filepath;
+    let searchLocations = [];
+
+    if(rootDir) {
+      searchLocations.push(TemplatePath.absolutePath(rootDir, localpath));
+    }
+
+    // fallbacks for file:../ installations
+    searchLocations.push(TemplatePath.absolutePath(__dirname, localpath));
+    searchLocations.push(TemplatePath.absolutePath(__dirname, "../../../", localpath));
+
+    for(let loc of searchLocations) {
+      if(fs.existsSync(loc)) {
+        filepath = loc;
+        break;
+      }
+    }
+
+    return this.#readFile(filepath);
+  }
+
+  augmentContentWithNotifier(content, inlineContents = false, options = {}) {
+    let { integrityHash, scriptContents } = options;
+    if(!scriptContents) {
+      scriptContents = this.#getFileContents("./client/reload-client.js");
+    }
+    if(!integrityHash) {
+      integrityHash = ssri.fromData(scriptContents);
+    }
+
+    let searchParams = new URLSearchParams();
+    if(this.options.reloadPort) {
+      searchParams.set("reloadPort", this.options.reloadPort);
+    }
+
+    let searchParamsStr = searchParams.size > 0 ? `?${searchParams.toString()}` : "";
+
+    // This isn’t super necessary because it’s a local file, but it’s included anyway
+    let script = `<script type="module" integrity="${integrityHash}"${inlineContents ? `>${scriptContents}` : ` src="/${this.options.injectedScriptsFolder}/reload-client.js${searchParamsStr}">`}</script>`;
+
+    if (content.includes("</head>")) {
+      return content.replace("</head>", `${script}</head>`);
+    }
+
+    // If the HTML document contains an importmap, insert the module script after the importmap element
+    let importMapRegEx = /<script type=\\?importmap\\?[^>]*>(\n|.)*?<\/script>/gmi;
+    let importMapMatch = content.match(importMapRegEx)?.[0];
+
+    if (importMapMatch) {
+      return content.replace(importMapMatch, `${importMapMatch}${script}`);
+    }
+
+    // <title> is the only *required* element in an HTML document
+    if (content.includes("</title>")) {
+      return content.replace("</title>", `</title>${script}`);
+    }
+
+    // If you’ve reached this section, your HTML is invalid!
+    // We want to be super forgiving here, because folks might be in-progress editing the document!
+    if (content.includes("</body>")) {
+      return content.replace("</body>", `${script}</body>`);
+    }
+    if (content.includes("</html>")) {
+      return content.replace("</html>", `${script}</html>`);
+    }
+    if (content.includes("<!doctype html>")) {
+      return content.replace("<!doctype html>", `<!doctype html>${script}`);
+    }
+
+    // Notably, works without content at all!!
+    return (content || "") + script;
+  }
+
+  getFileContentType(filepath, res) {
+    let contentType = res.getHeader("Content-Type");
+
+    // Content-Type might be already set via middleware
+    if (contentType) {
+      return contentType;
+    }
+
+    let mimeType = mime.getType(filepath);
+    if (!mimeType) {
+      return;
+    }
+
+    contentType = mimeType;
+
+    // We only want to append charset if the header is not already set
+    if (contentType === "text/html") {
+      contentType = `text/html; charset=${this.options.encoding}`;
+    }
+
+    return contentType;
+  }
+
+  renderFile(filepath, res) {
+    let contents = fs.readFileSync(filepath);
+    let contentType = this.getFileContentType(filepath, res);
+
+    for(const [key, value] of Object.entries(this.options.headers)){
+      res.setHeader(key, value);
+    }
+
+    if (!contentType) {
+      return res.end(contents);
+    }
+
+    res.setHeader("Content-Type", contentType);
+
+    if (contentType.startsWith("text/html")) {
+      // the string is important here, wrapResponse expects strings internally for HTML content (for now)
+      return res.end(contents.toString());
+    }
+
+    return res.end(contents);
+  }
+
+  async eleventyDevServerMiddleware(req, res, next) {
+    if(this.#serverState === "CLOSING") {
+      return res.end("");
+    }
+
+    for(let urlPatternString in this.options.onRequest) {
+      let fn = this.options.onRequest[urlPatternString];
+      let fullPath = this.getServerPath(urlPatternString);
+      let p = new URLPattern({ pathname: fullPath });
+
+      // request url should already include pathprefix.
+      let fullUrl = this.getServerUrlRaw("localhost", req.url);
+      let match = p.exec(fullUrl);
+
+      let u = new URL(fullUrl);
+
+      if(match) {
+        let result = await fn({
+          url: u,
+          pattern: p,
+          patternGroups: match?.pathname?.groups || {},
+        });
+
+        if(!result && result !== "") {
+          continue;
+        }
+
+        if(typeof result === "string") {
+          return res.end(result);
+        }
+
+        if(isPlainObject(result) || result instanceof Response) {
+          if(typeof result.status === "number") {
+            res.statusCode = result.status;
+          }
+
+          if(result.headers instanceof Headers) {
+            for(let [key, value] of result.headers.entries()) {
+              res.setHeader(key, value);
+            }
+          } else if(isPlainObject(result.headers)) {
+            for(let key of Object.keys(result.headers)) {
+              res.setHeader(key, result.headers[key]);
+            }
+          }
+
+          if(result instanceof Response) {
+            // no gzip/br compression here, uncompressed from fetch https://github.com/w3c/ServiceWorker/issues/339
+            res.removeHeader("content-encoding");
+
+            let arrayBuffer = await result.arrayBuffer();
+            res.setHeader("content-length", arrayBuffer.byteLength);
+
+            let buffer = Buffer.from(arrayBuffer);
+            return res.end(buffer);
+          }
+
+          return res.end(result.body || "");
+        }
+
+        throw new Error(`Invalid return type from \`onRequest\` pattern for ${urlPatternString}: expected string, object literal, or Response instance.`);
+      }
+    } // end onRequest
+
+    if(req.url.startsWith(`/${this.options.injectedScriptsFolder}/reload-client.js`)) {
+      if(this.options.liveReload) {
+        res.setHeader("Content-Type", mime.getType("js"));
+        return res.end(this.#getFileContents("./client/reload-client.js"));
+      }
+    } else if(req.url === `/${this.options.injectedScriptsFolder}/morphdom.js`) {
+      if(this.options.domDiff) {
+        res.setHeader("Content-Type", mime.getType("js"));
+        let morphdomEsmPath = require.resolve("morphdom").replace("morphdom.js", "morphdom-esm.js");
+        return res.end(this.#readFile(morphdomEsmPath));
+      }
+    }
+
+    next();
+  }
+
+  // This runs at the end of the middleware chain
+  eleventyProjectMiddleware(req, res) {
+    // Known issue with `finalhandler` and HTTP/2:
+    // UnsupportedWarning: Status message is not supported by HTTP/2 (RFC7540 8.1.2.4)
+    // https://github.com/pillarjs/finalhandler/pull/34
+
+    let lastNext = finalhandler(req, res, {
+      onerror: (e) => {
+        if (e.statusCode === 404) {
+          let localPath = TemplatePath.stripLeadingSubPath(
+            e.path,
+            TemplatePath.absolutePath(this.dir)
+          );
+          this.logger.error(
+            `HTTP ${e.statusCode}: Template not found in output directory (${this.dir}): ${localPath}`
+          );
+        } else {
+          this.logger.error(`HTTP ${e.statusCode}: ${e.message}`);
+        }
+      },
+    });
+
+    // middleware (maybe a serverless request) already set a body upstream, skip this part
+    if(!res._shouldForceEnd) {
+      let match = this.mapUrlToFilePath(req.url);
+      debug( req.url, match );
+
+      if (match) {
+        if (match.statusCode === 200 && match.filepath) {
+          // Content-Range request, probably Safari trying to stream video
+          if (req.headers.range)  {
+            return send(req, match.filepath).pipe(res);
+          }
+
+          return this.renderFile(match.filepath, res);
+        }
+
+        // Redirects, usually for trailing slash to .html stuff
+        if (match.url) {
+          res.statusCode = match.statusCode;
+          res.setHeader("Location", match.url);
+          return res.end();
+        }
+
+        let raw404Path = this.getOutputDirFilePath("404.html");
+        if(match.statusCode === 404 && this.isOutputFilePathExists(raw404Path)) {
+          res.statusCode = match.statusCode;
+          res.isCustomErrorPage = true;
+          return this.renderFile(raw404Path, res);
+        }
+      }
+    }
+
+    if(res.body && !res.bodyUsed) {
+      if(res._shouldForceEnd) {
+        res.end();
+      } else {
+        let err = new Error("A response was never written to the stream. Are you missing a server middleware with `res.end()`?");
+        err.statusCode = 500;
+        lastNext(err);
+        return;
+      }
+    }
+
+    lastNext();
+  }
+
+  async onRequestHandler (req, res) {
+    res = wrapResponse(res, content => {
+
+      // check to see if this is a client fetch and not a navigation
+      let isXHR = req.headers["sec-fetch-mode"] && req.headers["sec-fetch-mode"] != "navigate";
+
+      if(this.options.liveReload !== false && !isXHR) {
+        let scriptContents = this.#getFileContents("./client/reload-client.js");
+        let integrityHash = ssri.fromData(scriptContents);
+
+        // Bare (not-custom) finalhandler error pages have a Content-Security-Policy `default-src 'none'` that
+        // prevents the client script from executing, so we override it
+        if(res.statusCode !== 200 && !res.isCustomErrorPage) {
+          res.setHeader("Content-Security-Policy", `script-src '${integrityHash}'`);
+        }
+        return this.augmentContentWithNotifier(content, res.statusCode !== 200, {
+          scriptContents,
+          integrityHash
+        });
+      }
+
+      return content;
+    });
+
+    let middlewares = this.options.middleware || [];
+    middlewares = middlewares.slice();
+
+    // TODO because this runs at the very end of the middleware chain,
+    // if we move the static stuff up in the order we could use middleware to modify
+    // the static content in middleware!
+    middlewares.push(this.eleventyProjectMiddleware);
+    middlewares.reverse();
+
+    // Runs very first in the middleware chain
+    middlewares.push(this.eleventyDevServerMiddleware);
+
+    let bound = [];
+    let next;
+
+    for(let ware of middlewares) {
+      let fn;
+      if(next) {
+        fn = ware.bind(this, req, res, next);
+      } else {
+        fn = ware.bind(this, req, res);
+      }
+      bound.push(fn);
+      next = fn;
+    }
+
+    bound.reverse();
+
+    let [first] = bound;
+    await first();
+  }
+
+  getHosts() {
+    let hosts = new Set();
+    if(this.options.showAllHosts) {
+      for(let host of ipAddress()) {
+        hosts.add(this.getServerUrl(host));
+      }
+    }
+    hosts.add(this.getServerUrl("localhost"));
+    return Array.from(hosts);
+  }
+
+  get server() {
+    if (this._server) {
+      return this._server;
+    }
+
+    this.start = Date.now();
+
+    // Check for secure server requirements, otherwise use HTTP
+    let { key, cert } = this.options.https;
+    if(key && cert) {
+      const { createSecureServer } = require("http2");
+
+      let options = {
+        allowHTTP1: true,
+
+        // Credentials
+        key: fs.readFileSync(key),
+        cert: fs.readFileSync(cert),
+      };
+      this._server = createSecureServer(options, this.onRequestHandler.bind(this));
+      this._serverProtocol = "https:";
+    } else {
+      const { createServer } = require("http");
+
+      this._server = createServer(this.onRequestHandler.bind(this));
+      this._serverProtocol = "http:";
+    }
+
+    this.portRetryCount = 0;
+    this._server.on("error", (err) => {
+      if (err.code == "EADDRINUSE") {
+        if (this.portRetryCount < this.options.portReassignmentRetryCount) {
+          this.portRetryCount++;
+          debug(
+            "Server already using port %o, trying the next port %o. Retry number %o of %o",
+            err.port,
+            err.port + 1,
+            this.portRetryCount,
+            this.options.portReassignmentRetryCount
+          );
+          this._serverListen(err.port + 1);
+        } else {
+          throw new Error(
+            `Tried ${this.options.portReassignmentRetryCount} different ports but they were all in use. You can a different starter port using --port on the command line.`
+          );
+        }
+      } else {
+        this._serverErrorHandler(err);
+      }
+    });
+
+    this._server.on("listening", (e) => {
+      this.setupReloadNotifier();
+
+      let logMessageCallback = typeof this.options.messageOnStart === "function" ? this.options.messageOnStart : () => false;
+      let hosts = this.getHosts();
+      let message = logMessageCallback({
+        hosts,
+        localhostUrl: this.getServerUrl("localhost"),
+        options: this.options,
+        version: pkg.version,
+        startupTime: Date.now() - this.start,
+      });
+
+      if(message) {
+        this.logger.info(message);
+      }
+
+      this.#readyResolve();
+    });
+
+    return this._server;
+  }
+
+  async ready() {
+    return this.#readyPromise;
+  }
+
+  _serverListen(port) {
+    this.server.listen({
+      port,
+    });
+  }
+
+  getServerPath(pathname) {
+    // duplicate slashes
+    if(this.options.pathPrefix.endsWith("/") && pathname.startsWith("/")) {
+      pathname = pathname.slice(1);
+    }
+    return `${this.options.pathPrefix}${pathname}`;
+  }
+
+  getServerUrlRaw(host, pathname = "", isRaw = true) {
+    if(!this._server || !this._serverProtocol) {
+      throw new Error("Access to server url not yet available.");
+    }
+
+    let address = this._server.address();
+    if(!address?.port) {
+      throw new Error("Access to server port not yet available.");
+    }
+
+    return `${this._serverProtocol}//${host}:${address.port}${isRaw ? pathname : this.getServerPath(pathname)}`;
+  }
+
+  getServerUrl(host, pathname = "") {
+    return this.getServerUrlRaw(host, pathname, false);
+  }
+
+  async getPort() {
+    return new Promise(resolve => {
+      this.server.on("listening", (e) => {
+        let { port } = this._server.address();
+        resolve(port);
+      });
+    })
+  }
+
+  serve(port) {
+    this.getWatcher();
+
+    this._serverListen(port);
+  }
+
+  _serverErrorHandler(err) {
+    if (err.code == "EADDRINUSE") {
+      this.logger.error(`Server error: Port in use ${err.port}`);
+    } else {
+      this.logger.error(`Server error: ${err.message}`);
+    }
+  }
+
+  // Websocket Notifications
+  setupReloadNotifier() {
+    let options = {};
+    if(this.options.reloadPort) {
+      options.port = this.options.reloadPort;
+    } else {
+      // includes the port
+      options.server = this.server;
+    }
+
+    let updateServer = new WebSocketServer(options);
+
+    updateServer.on("connection", (ws) => {
+      this.sendUpdateNotification({
+        type: "eleventy.status",
+        status: "connected",
+      });
+    });
+
+    updateServer.on("error", (err) => {
+      this._serverErrorHandler(err);
+    });
+
+    this.updateServer = updateServer;
+  }
+
+  // Broadcasts to all open browser windows
+  sendUpdateNotification(obj) {
+    if(!this.updateServer?.clients) {
+      return;
+    }
+
+    for(let client of this.updateServer.clients) {
+      if (client.readyState === WebSocket.OPEN) {
+        client.send(JSON.stringify(obj));
+      }
+    }
+  }
+
+  // Helper for promisifying close methods with callbacks, like http.Server or ws.WebSocketServer.
+  async _closeServer(server) {
+    return new Promise((resolve, reject) => {
+      server.close(err => {
+        if (err) {
+          reject(err);
+        }
+        resolve();
+      });
+
+      // Note: this method won’t exist for updateServer
+      if("closeAllConnections" in server) {
+        // Node 18.2+
+        server.closeAllConnections();
+      }
+    });
+  }
+
+  async close() {
+    // Prevent multiple invocations.
+    if (this.#serverClosing) {
+      return this.#serverClosing;
+    }
+
+    // TODO would be awesome to set a delayed redirect when port changed to redirect to new _server_
+    this.sendUpdateNotification({
+      type: "eleventy.status",
+      status: "disconnected",
+    });
+
+    let promises = []
+    if(this.updateServer) {
+      // Close all existing WS connections.
+      this.updateServer?.clients.forEach(socket => socket.close());
+      promises.push(this._closeServer(this.updateServer));
+    }
+
+    if(this._server?.listening) {
+      promises.push(this._closeServer(this.server));
+    }
+
+    if(this.#watcher) {
+      promises.push(this.#watcher.close());
+      this.#watcher = undefined;
+    }
+
+    this.#serverClosing = Promise.all(promises).then(() => {
+      this.#serverState = "CLOSED";
+      this.#serverClosing = undefined;
+    });
+
+    this.#serverState = "CLOSING";
+
+    return this.#serverClosing;
+  }
+
+  sendError({ error }) {
+    this.sendUpdateNotification({
+      type: "eleventy.error",
+      // Thanks https://stackoverflow.com/questions/18391212/is-it-not-possible-to-stringify-an-error-using-json-stringify
+      error: JSON.stringify(error, Object.getOwnPropertyNames(error)),
+    });
+  }
+
+  // reverse of mapUrlToFilePath
+  // /resource/ <= /resource/index.html
+  // /resource <= resource.html
+  getUrlsFromFilePath(path) {
+    if(this.dir === ".") {
+      path = `/${path}`
+    } else {
+      path = path.slice(this.dir.length);
+    }
+
+    let urls = [];
+    urls.push(path);
+
+    if(path.endsWith(`/${this.options.indexFileName}`)) {
+      urls.push(path.slice(0, -1 * this.options.indexFileName.length));
+    } else if(path.endsWith(".html")) {
+      urls.push(path.slice(0, -1 * ".html".length));
+    }
+
+    return urls;
+  }
+
+  // returns [{ url, inputPath, content }]
+  getBuildTemplatesFromFilePath(path) {
+    // We can skip this for non-html files, dom-diffing will not apply
+    if(!path.endsWith(".html")) {
+      return [];
+    }
+
+    let urls = this.getUrlsFromFilePath(path);
+    let obj = {
+      inputPath: path,
+      content: fs.readFileSync(path, "utf8"),
+    }
+
+    return urls.map(url => {
+      return Object.assign({ url }, obj);
+    });
+  }
+
+  reloadFiles(files, useDomDiffingForHtml = true) {
+    if(!Array.isArray(files)) {
+      throw new Error("reloadFiles method requires an array of file paths.");
+    }
+
+    let subtype;
+    if(!files.some((entry) => !entry.endsWith(".css"))) {
+      // only if all changes are css changes
+      subtype = "css";
+    }
+
+    let templates = [];
+    if(useDomDiffingForHtml && this.options.domDiff) {
+      for(let filePath of files) {
+        if(!filePath.endsWith(".html")) {
+          continue;
+        }
+        for(let templateEntry of this.getBuildTemplatesFromFilePath(filePath)) {
+          templates.push(templateEntry);
+        }
+      }
+    }
+
+    this.reload({
+      files,
+      subtype,
+      build: {
+        templates
+      }
+    });
+  }
+
+  reload(event = {}) {
+    let { subtype, files, build } = event;
+    if (build?.templates) {
+      build.templates = build.templates
+        .filter(entry => {
+          if(!this.options.domDiff) {
+            // Don’t include any files if the dom diffing option is disabled
+            return false;
+          }
+
+          // Filter to only include watched templates that were updated
+          return (files || []).includes(entry.inputPath);
+        });
+    }
+
+    this.sendUpdateNotification({
+      type: "eleventy.reload",
+      subtype,
+      files,
+      build,
+    });
+  }
+}
+
+module.exports = EleventyDevServer;