@uppy/companion/lib/server/redis.js

OAuth helper and remote fetcher for Uppy's (https://uppy.io) extensible file upload widget with support for drag&drop, resumable uploads, previews, restrictions, file processing/encoding, remote providers like Dropbox and Google Drive, S3 and more :dog:

"use strict";
const Redis = require('ioredis').default;
const logger = require('./logger');
/** @type {import('ioredis').Redis} */
let redisClient;
/**
 * A Singleton module that provides a single redis client through out
 * the lifetime of the server
 *
 * @param {string} [redisUrl] ioredis url
 * @param {Record<string, any>} [redisOptions] ioredis client options
 */
function createClient(redisUrl, redisOptions) {
    if (!redisClient) {
        if (redisUrl) {
            redisClient = new Redis(redisUrl, redisOptions);
        }
        else {
            redisClient = new Redis(redisOptions);
        }
        redisClient.on('error', (err) => logger.error('redis error', err.toString()));
    }
    return redisClient;
}
module.exports.client = ({ redisUrl, redisOptions } = { redisUrl: undefined, redisOptions: undefined }) => {
    if (!redisUrl && !redisOptions) {
        return redisClient;
    }
    return createClient(redisUrl, redisOptions);
};