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import { posix } from "../../deps/path.ts";
import type { Page, RawData } from "../file.ts";
/** Returns the final URL assigned to a page */export function getPageUrl(  page: Page,  prettyUrls: boolean,  parentPath: string,): string | false {  const data = page.data as RawData;  let { url } = data;
  if (url === false) {    return false;  }
  if (typeof url === "function") {    page.data.url = getDefaultUrl(page, parentPath, prettyUrls);    url = url(page);  }
  if (url === false) {    return false;  }
  if (typeof url === "string") {    // Relative URL    if (url.startsWith("./") || url.startsWith("../")) {      return normalizeUrl(posix.join(parentPath, url));    }
    if (url.startsWith("/")) {      return normalizeUrl(url);    }
    throw new Error(      `The url variable for the page ${page.sourcePath} (${url}) must start with "/", "./" or "../" `,    );  }
  // If the user has provided a value which hasn't yielded a string then it is an invalid url.  if (url !== undefined) {    throw new Error(      `The url variable for the page ${page.sourcePath} is not correct. If specified, it should either be a string, or a function which returns a string. The provided url is of type: ${typeof url}.`,    );  }
  return getDefaultUrl(page, parentPath, prettyUrls);}
/** Returns the default URL for a page */function getDefaultUrl(  page: Page,  parentPath: string,  prettyUrls: boolean,): string {  // Calculate the URL from the path  const url = posix.join(parentPath, page.data.basename);
  if (page.src.asset) {    return url + page.src.ext;  }
  // Pretty URLs affects to all pages but 404  if (prettyUrls && url !== "/404") {    if (posix.basename(url) === "index") {      return posix.join(posix.dirname(url), "/");    }    return posix.join(url, "/");  }
  return `${url}.html`;}
/** Remove the /index.html part if exist and replace spaces */function normalizeUrl(url: string): string {  url = encodeURI(url);
  if (url.endsWith("/index.html")) {    return url.slice(0, -10);  }
  return url;}