support stt speechmatics (#353)

* support stt speechmatics

* support speechmatics region authentication

* update testcase for speechmatics_stt_uri

lib/routes/api/speech-credentials.js

@@ -10,7 +10,8 @@ const {decryptCredential, testWhisper, testDeepgramTTS,
   testPlayHT,
   testRimelabs,
   testVerbioTts,
-  testVerbioStt} = require('../../utils/speech-utils');
+  testVerbioStt,
+  testSpeechmaticsStt} = require('../../utils/speech-utils');
 const {DbErrorUnprocessableRequest, DbErrorForbidden, DbErrorBadRequest} = require('../../utils/errors');
 const {
   testGoogleTts,
@@ -122,6 +123,7 @@ const encryptCredential = (obj) => {
     secret,
     nuance_tts_uri,
     nuance_stt_uri,
+    speechmatics_stt_uri,
     deepgram_stt_uri,
     deepgram_stt_use_tls,
     deepgram_tts_uri,
@@ -236,6 +238,12 @@ const encryptCredential = (obj) => {
       const elevenlabsData = JSON.stringify({api_key, model_id, options});
       return encrypt(elevenlabsData);
 
+    case 'speechmatics':
+      assert(api_key, 'invalid speechmatics speech credential: api_key is required');
+      assert(speechmatics_stt_uri, 'invalid speechmatics speech credential: speechmatics_stt_uri is required');
+      const speechmaticsData = JSON.stringify({api_key, speechmatics_stt_uri, options});
+      return encrypt(speechmaticsData);
+
     case 'playht':
       assert(api_key, 'invalid playht speech credential: api_key is required');
       assert(user_id, 'invalid playht speech credential: user_id is required');
@@ -768,6 +776,18 @@ router.get('/:sid/test', async(req, res) => {
           SpeechCredential.ttsTestResult(sid, false);
         }
       }
+    } else if (cred.vendor === 'speechmatics') {
+      const {api_key} = credential;
+      if (cred.use_for_stt) {
+        try {
+          await testSpeechmaticsStt(logger, {api_key});
+          results.stt.status = 'ok';
+          SpeechCredential.ttsTestResult(sid, true);
+        } catch (err) {
+          results.stt = {status: 'fail', reason: err.message};
+          SpeechCredential.ttsTestResult(sid, false);
+        }
+      }
     } else if (cred.vendor === 'playht') {
       if (cred.use_for_tts) {
         try {