support assembly ai (#248)

* support assembly ai

* wip

* wip

lib/utils/speech-utils.js

@@ -5,6 +5,7 @@ const sdk = require('microsoft-cognitiveservices-speech-sdk');
 const { SpeechClient } = require('@soniox/soniox-node');
 const bent = require('bent');
 const fs = require('fs');
+const { AssemblyAI } = require('assemblyai');
 
 
 const testSonioxStt = async(logger, credentials) => {
@@ -260,6 +261,32 @@ const testWellSaidStt = async(logger, credentials) => {
   return true;
 };
 
+const testAssemblyStt = async(logger, credentials) => {
+  const {api_key} = credentials;
+
+  const assemblyai = new AssemblyAI({
+    apiKey: api_key
+  });
+
+  const audioUrl = `${__dirname}/../../data/test_audio.wav`;
+
+  return new Promise((resolve, reject) => {
+    assemblyai.transcripts
+      .create({ audio_url: audioUrl })
+      .then((transcript) => {
+        logger.debug({transcript}, 'got transcription from AssemblyAi');
+        if (transcript.status === 'error') {
+          return reject({message: transcript.error});
+        }
+        return resolve(transcript.text);
+      })
+      .catch((err) => {
+        logger.info({err}, 'failed to get assemblyAI transcription');
+        reject(err);
+      });
+  });
+};
+
 module.exports = {
   testGoogleTts,
   testGoogleStt,
@@ -275,5 +302,6 @@ module.exports = {
   testIbmTts,
   testIbmStt,
   testSonioxStt,
-  testElevenlabs
+  testElevenlabs,
+  testAssemblyStt
 };