From 26822b6b492228060906ffbdfcc1d7899ee83db1 Mon Sep 17 00:00:00 2001
From: Raja Subramanian <raja.gobi@tutanota.com>
Date: Sat, 22 Mar 2025 13:16:13 +0530
Subject: [PATCH] ParseUsername utility for TURN user name. (#3547)

* ParseUsername utility for TURN user name.

NOTE: There is no state, so no need for struct method, but just doing it
similar to CreateUsername which also does not have state, but uses
struct method.

* missed base62 decode
---
 pkg/service/turn.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/pkg/service/turn.go b/pkg/service/turn.go
index dc2d21b7a..f37ff3e6b 100644
--- a/pkg/service/turn.go
+++ b/pkg/service/turn.go
@@ -164,6 +164,19 @@ func (h *TURNAuthHandler) CreateUsername(apiKey string, pID livekit.ParticipantI
 	return base62.EncodeToString([]byte(fmt.Sprintf("%s|%s", apiKey, pID)))
 }
 
+func (h *TURNAuthHandler) ParseUsername(username string) (apiKey string, pID livekit.ParticipantID, err error) {
+	decoded, err := base62.DecodeString(username)
+	if err != nil {
+		return "", "", err
+	}
+	parts := strings.Split(string(decoded), "|")
+	if len(parts) != 2 {
+		return "", "", errors.New("invalid username")
+	}
+
+	return parts[0], livekit.ParticipantID(parts[1]), nil
+}
+
 func (h *TURNAuthHandler) CreatePassword(apiKey string, pID livekit.ParticipantID) (string, error) {
 	secret := h.keyProvider.GetSecret(apiKey)
 	if secret == "" {