28 lines
770 B
TypeScript
28 lines
770 B
TypeScript
import Redis from 'ioredis';
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import {REDIS_URL} from '../app/constants';
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export const redis = new Redis(REDIS_URL);
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export const REDIS_ONE_MINUTE = 60;
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export const REDIS_DEFAULT_EXPIRY = REDIS_ONE_MINUTE / 60;
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/**
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* @param key The key for redis (use Keys#<type>)
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* @param fn The function to return a resource. Can be a promise
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* @param seconds The amount of seconds to hold this resource in redis for. Defaults to 60
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*/
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export async function wrapRedis<T>(key: string, fn: () => Promise<T>, seconds = REDIS_DEFAULT_EXPIRY): Promise<T> {
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const cached = await redis.get(key);
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if (cached) {
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return JSON.parse(cached);
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}
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const recent = await fn();
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if (recent) {
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await redis.set(key, JSON.stringify(recent), 'EX', seconds);
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}
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return recent;
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}
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