From 6a1da30eba7e00459400533ab72cad43ee56b933 Mon Sep 17 00:00:00 2001
From: Ozcan Ovunc <oovunc@altayer.com>
Date: Tue, 9 May 2023 21:24:09 +0300
Subject: [PATCH] Add support for async serializer so it can be used with
 worker threads

---
 index.ts  | 4 ++--
 readme.md | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/index.ts b/index.ts
index 51de30f..88af6a0 100644
--- a/index.ts
+++ b/index.ts
@@ -12,7 +12,7 @@ interface NormalizedRedisClient {
 }
 
 interface Serializer {
-  parse(s: string): SessionData
+  parse(s: string): SessionData | Promise<SessionData>
   stringify(s: SessionData): string
 }
 
@@ -83,7 +83,7 @@ class RedisStore extends Store {
     try {
       let data = await this.client.get(key)
       if (!data) return cb()
-      return cb(null, this.serializer.parse(data))
+      return cb(null, await this.serializer.parse(data))
     } catch (err) {
       return cb(err)
     }
diff --git a/readme.md b/readme.md
index 416de32..7c26f1b 100644
--- a/readme.md
+++ b/readme.md
@@ -113,9 +113,11 @@ This option disables key expiration requiring the user to manually manage key cl
 
 Provide a custom encoder/decoder to use when storing and retrieving session data from Redis (default: `JSON.parse` and `JSON.stringify`).
 
+Optionally `parse` method can be async if need be.
+
 ```ts
 interface Serializer {
-  parse(string): object
+  parse(string): object | Promise<object>
   stringify(object): string
 }
 ```