refactor .js files to ES modules where possible

lib/config/index.js

@@ -1,6 +1,6 @@
 // @ts-check
-// do not convert to ESM and/or TS -- this needs to be imported in CJS files like next.config.js too
-module.exports = {
+
+const config = {
   // Site info
   siteName: "Jake Jarvis",
   siteDomain: "jarv.is",
@@ -17,8 +17,6 @@ module.exports = {
   githubRepo: "jakejarvis/jarv.is",
   verifyGoogle: "qQhmLTwjNWYgQ7W42nSTq63xIrTch13X_11mmxBE9zk",
   verifyBing: "164551986DA47F7F6FC0D21A93FFFCA6",
-  fathomSiteId: "PIUEIVIZ",
-  hcaptchaSiteKey: "60d959de-b01b-4e22-a901-ce395ed086cb",
   giscusConfig: {
     // https://github.com/giscus/giscus-component/tree/main/packages/react#readme
     repo: "jakejarvis/jarv.is",
@@ -41,3 +39,5 @@ module.exports = {
     mastodon: "fediverse.jarv.is/@jake",
   },
 };
+
+export default config;

lib/config/seo.ts

@@ -1,4 +1,4 @@
-import * as config from ".";
+import config from ".";
 import { meJpg, faviconPng, faviconIco, appleTouchIconPng } from "./favicons";
 
 import type { DefaultSeoProps, SocialProfileJsonLdProps, ArticleJsonLdProps } from "next-seo";

lib/helpers/build-feed.ts

@@ -1,21 +1,20 @@
 import { Feed } from "feed";
 import { getAllPosts } from "./posts";
-import * as config from "../config";
+import config from "../config";
 import { meJpg } from "../config/favicons";
 import type { GetServerSideProps } from "next";
 
 export type GetServerSideFeedProps = GetServerSideProps<Record<string, never>>;
 
 export type BuildFeedOptions = {
-  edgeCacheAge?: number; // in seconds, defaults to 43200 (12 hours)
+  format: "rss" | "atom" | "json";
 };
 
 // handles literally *everything* about building the server-side rss/atom feeds and writing the response.
 // all the page needs to do is `return buildFeed(context, "rss")` from getServerSideProps.
 export const buildFeed = async (
   context: Parameters<GetServerSideFeedProps>[0],
-  type: "rss" | "atom" | "json",
-  options?: BuildFeedOptions
+  options: BuildFeedOptions
 ): Promise<ReturnType<GetServerSideFeedProps>> => {
   const { res } = context;
   const baseUrl = process.env.NEXT_PUBLIC_BASE_URL || `https://${config.siteDomain}`;
@@ -59,26 +58,23 @@ export const buildFeed = async (
     });
   });
 
-  // cache on edge for 12 hours by default
-  res.setHeader(
-    "cache-control",
-    `public, max-age=0, s-maxage=${options?.edgeCacheAge ?? 86400}, stale-while-revalidate`
-  );
+  // cache on edge for 24 hours by default
+  res.setHeader("cache-control", `public, max-age=0, s-maxage=86400, stale-while-revalidate`);
 
   // generates RSS by default
-  if (type === "rss") {
+  if (options.format === "rss") {
     res.setHeader("content-type", "application/rss+xml; charset=utf-8");
     res.write(feed.rss2());
-  } else if (type === "atom") {
+  } else if (options.format === "atom") {
     res.setHeader("content-type", "application/atom+xml; charset=utf-8");
     res.write(feed.atom1());
-  } else if (type === "json") {
+  } else if (options.format === "json") {
     // rare but including as an option because why not...
     // https://www.jsonfeed.org/
     res.setHeader("content-type", "application/feed+json; charset=utf-8");
     res.write(feed.json1());
   } else {
-    throw new TypeError(`Invalid feed type "${type}", must be "rss", "atom", or "json".`);
+    throw new TypeError(`Invalid feed type "${options.format}", must be "rss", "atom", or "json".`);
   }
 
   res.end();

lib/helpers/format-date.ts

@@ -5,7 +5,7 @@ import dayjsRelativeTime from "dayjs/plugin/relativeTime";
 import dayjsLocalizedFormat from "dayjs/plugin/localizedFormat";
 import dayjsAdvancedFormat from "dayjs/plugin/advancedFormat";
 import "dayjs/locale/en";
-import { timeZone } from "../config";
+import config from "../config";
 
 const IsomorphicDayJs = (date?: dayjs.ConfigType): dayjs.Dayjs => {
   // plugins
@@ -15,7 +15,7 @@ const IsomorphicDayJs = (date?: dayjs.ConfigType): dayjs.Dayjs => {
   dayjs.extend(dayjsLocalizedFormat);
   dayjs.extend(dayjsAdvancedFormat);
 
-  return dayjs(date).locale("en").tz(timeZone).clone();
+  return dayjs(date).locale("en").tz(config.timeZone).clone();
 };
 
 // simple wrapper around dayjs.format() to normalize timezone across the site, both server and client side, to prevent