From 35f7b0b90b8f304d7ae550ec16bdb063303c7e5b Mon Sep 17 00:00:00 2001
From: Hongbo Wu <hongbo@omnivore.app>
Date: Mon, 26 Sep 2022 17:47:40 +0800
Subject: [PATCH] Do not breaking on words and bookmarks

---
 packages/text-to-speech/src/textToSpeech.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/text-to-speech/src/textToSpeech.ts b/packages/text-to-speech/src/textToSpeech.ts
index 5b35aae48..1da109085 100644
--- a/packages/text-to-speech/src/textToSpeech.ts
+++ b/packages/text-to-speech/src/textToSpeech.ts
@@ -139,11 +139,12 @@ export const synthesizeTextToSpeech = async (
     }
     // for ssml
     let audioData: Buffer = Buffer.from([])
-    // split ssml into chunks of 200 characters to stream faster
-    const ssmlChunks = input.text.match(/.{1,200}/g)
-    // TODO: not split on words and bookmarks
+    // split ssml into chunks of 2000 characters to stream faster
+    // both within limit & without breaking on words and bookmarks
+    const ssmlChunks = input.text.match(/.{1,2000}(?= |$)(?! mark=)/g)
     if (ssmlChunks) {
       for (const ssmlChunk of ssmlChunks) {
+        console.log('ssmlChunk', ssmlChunk)
         const ssml = `${startSsml(ssmlOptions)}${ssmlChunk}${endSsml()}`
         const result = await speakSsmlAsyncPromise(ssml)
         if (result.reason === ResultReason.Canceled) {