From 5e2323ab235c5ea02846be1c550f11bea32cc223 Mon Sep 17 00:00:00 2001
From: Hongbo Wu <hongbo@omnivore.app>
Date: Wed, 28 Aug 2024 09:46:50 +0800
Subject: [PATCH] remove tts cache

---
 packages/text-to-speech/src/index.ts | 32 ++--------------------------
 1 file changed, 2 insertions(+), 30 deletions(-)

diff --git a/packages/text-to-speech/src/index.ts b/packages/text-to-speech/src/index.ts
index a933a940e..9101ff8c1 100644
--- a/packages/text-to-speech/src/index.ts
+++ b/packages/text-to-speech/src/index.ts
@@ -38,11 +38,6 @@ interface HTMLInput {
   bucket: string
 }
 
-interface CacheResult {
-  audioDataString: string
-  speechMarks: SpeechMark[]
-}
-
 interface Claim {
   uid: string
   featureName: string | null
@@ -283,20 +278,6 @@ export const textToSpeechStreamingHandler = Sentry.GCPFunction.wrapHttpFunction(
       const ssml = `${startSsml(ssmlOptions)}${utteranceInput.text}${endSsml()}`
       // hash ssml to get the cache key
       const cacheKey = crypto.createHash('md5').update(ssml).digest('hex')
-      // find audio data in cache
-      const cacheResult = await redisDataSource.cacheClient.get(cacheKey)
-      if (cacheResult) {
-        console.log('Cache hit')
-        const { audioDataString, speechMarks }: CacheResult =
-          JSON.parse(cacheResult)
-        res.send({
-          idx: utteranceInput.idx,
-          audioData: audioDataString,
-          speechMarks,
-        })
-        return
-      }
-      console.log('Cache miss')
 
       const bucket = process.env.GCS_UPLOAD_BUCKET
       if (!bucket) {
@@ -350,17 +331,6 @@ export const textToSpeechStreamingHandler = Sentry.GCPFunction.wrapHttpFunction(
         }
       }
 
-      const audioDataString = audioData.toString('hex')
-      // save audio data to cache for 72 hours for mainly the newsletters
-      await redisDataSource.cacheClient.set(
-        cacheKey,
-        JSON.stringify({ audioDataString, speechMarks }),
-        'EX',
-        3600 * 72,
-        'NX'
-      )
-      console.log('Cache saved')
-
       // update character count
       await updateCharacterCountInRedis(
         redisDataSource,
@@ -368,6 +338,8 @@ export const textToSpeechStreamingHandler = Sentry.GCPFunction.wrapHttpFunction(
         characterCount
       )
 
+      const audioDataString = audioData.toString('hex')
+
       res.send({
         idx: utteranceInput.idx,
         audioData: audioDataString,