Add client-side caching

src/utils/redisKeys.ts

@@ -3,6 +3,7 @@ import { Feature, HashedUserID, UserID } from "../types/user.model";
 import { HashedValue } from "../types/hash.model";
 import { Logger } from "./logger";
 import { BrandingUUID } from "../types/branding.model";
+import { RedisCommandArgument } from "@redis/client/dist/lib/commands";
 
 export const skipSegmentsKey = (videoID: VideoID, service: Service): string =>
     `segments.v6.${service}.videoID.${videoID}`;
@@ -65,4 +66,8 @@ export function videoLabelsHashKey(hashedVideoIDPrefix: VideoIDHash, service: Se
 
 export function userFeatureKey (userID: HashedUserID, feature: Feature): string {
     return `user.v2.${userID}.feature.${feature}`;
+}
+
+export function shouldClientCacheKey(key: RedisCommandArgument): boolean {
+    return (key as string).startsWith("segments.");
 }