Limit polls page results and expire stale polls

Author: sanjayprabhu

Diff for: app/actions.tsx

@@ -2,7 +2,7 @@
 
 import { kv } from "@vercel/kv";
 import { revalidatePath } from "next/cache";
-import {Poll} from "./types";
+import {Poll, POLL_EXPIRY} from "./types";
 import {redirect} from "next/navigation";
 
 export async function savePoll(poll: Poll, formData: FormData) {
@@ -16,6 +16,7 @@ export async function savePoll(poll: Poll, formData: FormData) {
     option4: formData.get("option4") as string,
   }
   await kv.hset(`poll:${poll.id}`, poll);
+  await kv.expire(`poll:${poll.id}`, POLL_EXPIRY);
   await kv.zadd("polls_by_date", {
     score: Number(poll.created_at),
     member: newPoll.id,

Diff for: app/polls/page.tsx

@@ -6,7 +6,7 @@ const SEVEN_DAYS_IN_MS = 1000 * 60 * 60 * 24 * 7;
 
 async function getPolls() {
     try {
-        let pollIds = await kv.zrange("polls_by_date", Date.now(), Date.now() - SEVEN_DAYS_IN_MS, {byScore: true, rev: true});
+        let pollIds = await kv.zrange("polls_by_date", Date.now(), Date.now() - SEVEN_DAYS_IN_MS, {byScore: true, rev: true, count: 100, offset: 0});
 
         if (!pollIds.length) {
             return [];

Diff for: app/types.tsx

@@ -12,4 +12,4 @@ export type Poll = {
   created_at: number;
 };
 
-
+export const POLL_EXPIRY = 60 * 60 * 24 * 180; // Expire polls after 3 months

Diff for: pages/api/vote.ts

@@ -1,5 +1,5 @@
 import type { NextApiRequest, NextApiResponse } from 'next';
-import {Poll} from "@/app/types";
+import {Poll, POLL_EXPIRY} from "@/app/types";
 import {kv} from "@vercel/kv";
 import {getSSLHubRpcClient, Message} from "@farcaster/hub-nodejs";
 
@@ -58,6 +58,8 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
                 let multi = kv.multi();
                 multi.hincrby(`poll:${pollId}`, `votes${buttonId}`, 1);
                 multi.sadd(`poll:${pollId}:voted`, fid);
+                multi.expire(`poll:${pollId}`, POLL_EXPIRY);
+                multi.expire(`poll:${pollId}:voted`, POLL_EXPIRY);
                 await multi.exec();
             }