Add getNextTerm, getPreviousTerm

lib/events.ts

@@ -6,7 +6,7 @@ import { MDXRemoteSerializeResult } from "next-mdx-remote";
 import { serialize } from "next-mdx-remote/serialize";
 
 const EVENTS_PATH = path.join("content", "events");
-const TERMS = ["winter", "spring", "fall"];
+export const TERMS = ["winter", "spring", "fall"];
 
 export async function getEventYears(): Promise<string[]> {
   return (await fs.readdir(EVENTS_PATH, { withFileTypes: true }))

pages/events/[year]/[term]/index.tsx

@@ -12,6 +12,7 @@ import {
   getEventsByTerm,
   getEventBySlug,
   Event,
+  TERMS,
 } from "@/lib/events";
 
 import styles from "./index.module.css";
@@ -21,7 +22,7 @@ interface Props {
   year: string;
   pastEvents: Event[];
   futureEvents: Event[];
-  currentTerm: boolean;
+  isCurrentTerm: boolean;
 }
 
 export default function Term(props: Props) {
@@ -46,8 +47,8 @@ export default function Term(props: Props) {
           </div>
         </>
       )}
-      {hasPastEvents && props.currentTerm && <h2>Past Events</h2>}
-      {hasPastEvents && !props.currentTerm && (
+      {hasPastEvents && props.isCurrentTerm && <h2>Past Events</h2>}
+      {hasPastEvents && !props.isCurrentTerm && (
         <h2>
           Events Archive:
           <span className={styles.blue}>
@@ -82,6 +83,32 @@ export const getStaticProps: GetStaticProps<Props, Params> = async (
   // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
   const { year, term } = context.params!;
 
+  return await getProps(year, term);
+};
+
+export const getStaticPaths: GetStaticPaths<Params> = async () => {
+  const years = await getEventYears();
+  const paths = (
+    await Promise.all(
+      years.map(async (year) => {
+        const terms = await getEventTermsByYear(year);
+        return terms.map((curTerm) => ({
+          params: { year: year, term: curTerm },
+        }));
+      })
+    )
+  ).flat();
+
+  return {
+    paths: paths,
+    fallback: false,
+  };
+};
+
+export const getProps = async (
+  year: string,
+  term: string
+): Promise<{ props: Props }> => {
   const eventNames = await getEventsByTerm(year, term);
 
   const events: Event[] = (
@@ -103,34 +130,60 @@ export const getStaticProps: GetStaticProps<Props, Params> = async (
 
   const current = getCurrentTerm();
 
+  // console.log(getPreviousTerm(term, year));
+  // console.log(getNextTerm(term, year));
+
   return {
     props: {
       term: term,
       year: year,
       pastEvents: pastEvents,
       futureEvents: futureEvents,
-      currentTerm: term === current.term && year === current.year,
+      isCurrentTerm: term === current.term && year === current.year,
     },
   };
 };
 
-export const getStaticPaths: GetStaticPaths<Params> = async () => {
-  const years = await getEventYears();
-  const paths = (
-    await Promise.all(
-      years.map(async (year) => {
-        const terms = await getEventTermsByYear(year);
-        return terms.map((curTerm) => ({
-          params: { year: year, term: curTerm },
-        }));
-      })
-    )
-  ).flat();
-
+const getPreviousTerm = (
+  year: string,
+  term: string
+): { year: string; term: string } => {
+  const index = TERMS.indexOf(term);
+  if (index === -1) {
+    console.error("Not a valid term");
+    return { year: "", term: "" };
+  } else if (index === 0) {
     return {
-    paths: paths,
-    fallback: false,
+      year: (parseInt(year) - 1).toString(),
+      term: TERMS[TERMS.length - 1],
     };
+  } else {
+    return {
+      year: year,
+      term: TERMS[index - 1],
+    };
+  }
+};
+
+const getNextTerm = (
+  year: string,
+  term: string
+): { year: string; term: string } => {
+  const index = TERMS.indexOf(term);
+  if (index === -1) {
+    console.error("Not a valid term");
+    return { year: "", term: "" };
+  } else if (index === TERMS.length - 1) {
+    return {
+      year: (parseInt(year) + 1).toString(),
+      term: TERMS[0],
+    };
+  } else {
+    return {
+      year: year,
+      term: TERMS[index + 1],
+    };
+  }
 };
 
 export function getCurrentTerm() {