Fix lint problems

lib/events.ts

@@ -16,9 +16,12 @@ export async function getYears(): Promise<string[]> {
 }
 
 export async function getTermsByYear(year: string): Promise<string[]> {
-  return (await fs.readdir(path.join(EVENTS_PATH, year))).sort(
-    (a, b) => TERMS.indexOf(a) - TERMS.indexOf(b)
-  );
+  return (
+    await fs.readdir(path.join(EVENTS_PATH, year), { withFileTypes: true })
+  )
+    .filter((dirent) => dirent.isDirectory() && TERMS.includes(dirent.name))
+    .map((dirent) => dirent.name)
+    .sort((a, b) => TERMS.indexOf(a) - TERMS.indexOf(b));
 }
 
 interface Metadata {
@@ -55,12 +58,7 @@ export async function getEventsByTerm(
   year: string,
   term: string
 ): Promise<string[]> {
-  return (
-    await fs.readdir(path.join(EVENTS_PATH, year, term), {
-      withFileTypes: true,
-    })
-  )
-    .map((dirent) => dirent.name)
+  return (await fs.readdir(path.join(EVENTS_PATH, year, term)))
     .filter((name) => name.endsWith(".md"))
     .map((name) => name.slice(0, -".md".length));
 }

pages/events/[year]/index.tsx

@@ -1,7 +1,9 @@
 import React from "react";
-import { getYears, getTermsByYear } from "../../../lib/events";
-import styles from "./year.module.css";
+
 import { Link } from "../../../components/Link";
+import { getYears, getTermsByYear } from "../../../lib/events";
+
+import styles from "./year.module.css";
 
 export async function getStaticPaths(): Promise<{
   paths: {
@@ -55,7 +57,7 @@ const Year = (props: Props) => {
       <hr />
       <div className={styles.links}>
         {props.terms.map((term) => (
-          <Link key={term} href={`events/${props.year}/${term}`}>
+          <Link key={term} href={`/events/${props.year}/${term}`}>
             {`${term.charAt(0).toUpperCase()}${term.slice(1)}`}
           </Link>
         ))}