From 499852b2a70469d275dfc09577dc30d79c371c58 Mon Sep 17 00:00:00 2001
From: Claude Owner <claude@ejclaw.local>
Date: Tue, 26 May 2026 14:48:24 +0900
Subject: [PATCH] fix(tts): avoid char-by-char split when signature list is
 empty

SignatureClient.regex returned new RegExp("()", "g") when nameSet
was empty (server unreachable, list not yet synced). text.split() with
that regex matches every zero-width position, so 'abc' became
['a','','b','','c',''] and TTSClient sent a separate Chzzk request
per character.

Two-layer fix:
- SignatureClient.regex returns /$^/g (never-match) when names is
  empty, so split() returns the original string as a single element.
- TTSClient.getSource explicitly skips split when nameSet.size === 0
  so the intent is obvious at the call site.
---
 src/classes/SignatureClient.ts | 7 ++++++-
 src/classes/TTSClient.ts       | 6 +++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/classes/SignatureClient.ts b/src/classes/SignatureClient.ts
index c7c4485..ad0de4d 100644
--- a/src/classes/SignatureClient.ts
+++ b/src/classes/SignatureClient.ts
@@ -35,7 +35,12 @@ export class SignatureClient {
   }
 
   get regex() {
-    const escaped = [...this.nameSet].map(k => k.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'));
+    const names = [...this.nameSet];
+    // 빈 목록이면 new RegExp("()", "g")가 모든 위치에서 매칭돼
+    // text.split() 결과가 글자 단위로 쪼개진다. 절대 매칭되지 않는
+    // 패턴을 돌려줘 split 호출자가 원문을 그대로 받게 한다.
+    if (names.length === 0) return /$^/g;
+    const escaped = names.map(k => k.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'));
     return new RegExp(`(${escaped.join("|")})`, "g");
   }
 
diff --git a/src/classes/TTSClient.ts b/src/classes/TTSClient.ts
index 7e52b42..26fa809 100644
--- a/src/classes/TTSClient.ts
+++ b/src/classes/TTSClient.ts
@@ -92,7 +92,11 @@ export class TTSClient {
 
 
   private async getSource(text: string): Promise<Buffer | null> {
-    const parts = text.split(signature.regex);
+    // 시그니처 목록이 비어 있으면 split을 건너뛰고 원문을 한 번에 합성한다.
+    // (SignatureClient.regex가 빈 목록일 때 never-match 패턴을 돌려주지만,
+    //  소비자 측에서도 명시적으로 가드해 의도를 분명히 한다.)
+    const names = signature.nameSet;
+    const parts = names.size === 0 ? [text] : text.split(signature.regex);
     const bufferList: Buffer[] = [];
 
     for (const part of parts) {