Lazy require of ioredis

Author: EmilianoSanchez

CHANGES.txt

@@ -1,4 +1,5 @@
 1.15.1 (May 28, 2024)
+ - Updated the Redis storage to import `ioredis` dependency when the storage is created, to avoid errors when the SDK is imported or bundled in a .mjs file, since `ioredis` is a CommonJS module.
  - Bugfixing - Restored some input validation error logs that were removed in version 1.12.0. The logs inform the user when the `getTreatment(s)` methods are called with an invalid value as feature flag name or flag set name.
 
 1.15.0 (May 13, 2024)

src/storages/inRedis/index.ts

@@ -1,4 +1,4 @@
-import { RedisAdapter } from './RedisAdapter';
+import type { RedisAdapter } from './RedisAdapter';
 import { IStorageAsync, IStorageAsyncFactory, IStorageFactoryParams } from '../types';
 import { validatePrefix } from '../KeyBuilder';
 import { KeyBuilderSS } from '../KeyBuilderSS';
@@ -23,13 +23,17 @@ export interface InRedisStorageOptions {
  */
 export function InRedisStorage(options: InRedisStorageOptions = {}): IStorageAsyncFactory {
 
+  // Lazy loading to prevent error when bundling or importing the SDK in a .mjs file, since ioredis is a CommonJS module.
+  // Redis storage is not supported with .mjs files.
+  const RD = require('./RedisAdapter').RedisAdapter;
+
   const prefix = validatePrefix(options.prefix);
 
   function InRedisStorageFactory(params: IStorageFactoryParams): IStorageAsync {
     const { onReadyCb, settings, settings: { log, sync: { impressionsMode } } } = params;
     const metadata = metadataBuilder(settings);
     const keys = new KeyBuilderSS(prefix, metadata);
-    const redisClient = new RedisAdapter(log, options.options || {});
+    const redisClient: RedisAdapter = new RD(log, options.options || {});
     const telemetry = new TelemetryCacheInRedis(log, keys, redisClient);
     const impressionCountsCache = impressionsMode !== DEBUG ? new ImpressionCountsCacheInRedis(log, keys.buildImpressionsCountKey(), redisClient) : undefined;
     const uniqueKeysCache = impressionsMode === NONE ? new UniqueKeysCacheInRedis(log, keys.buildUniqueKeysKey(), redisClient) : undefined;