support deepgram tts onprem (#292)

* support deepgram tts onprem

* wip

* wip

* deepgram disable speech test if api_key is missng

lib/routes/api/speech-credentials.js

@@ -116,6 +116,8 @@ const encryptCredential = (obj) => {
     secret,
     nuance_tts_uri,
     nuance_stt_uri,
+    deepgram_stt_uri,
+    deepgram_stt_use_tls,
     use_custom_tts,
     custom_tts_endpoint,
     custom_tts_endpoint_url,
@@ -186,8 +188,11 @@ const encryptCredential = (obj) => {
       return encrypt(nuanceData);
 
     case 'deepgram':
-      assert(api_key, 'invalid deepgram speech credential: api_key is required');
-      const deepgramData = JSON.stringify({api_key});
+      // API key is optional if onprem
+      if (!deepgram_stt_uri) {
+        assert(api_key, 'invalid deepgram speech credential: api_key is required');
+      }
+      const deepgramData = JSON.stringify({api_key, deepgram_stt_uri, deepgram_stt_use_tls});
       return encrypt(deepgramData);
 
     case 'ibm':
@@ -415,7 +420,9 @@ router.put('/:sid', async(req, res) => {
           cobalt_server_uri,
           model_id,
           options,
-          use_streaming
+          use_streaming,
+          deepgram_stt_uri,
+          deepgram_stt_use_tls,
         } = req.body;
 
         const newCred = {
@@ -439,7 +446,9 @@ router.put('/:sid', async(req, res) => {
           cobalt_server_uri,
           model_id,
           options,
-          use_streaming
+          use_streaming,
+          deepgram_stt_uri,
+          deepgram_stt_use_tls,
         };
         logger.info({o, newCred}, 'updating speech credential with this new credential');
         obj.credential = encryptCredential(newCred);
@@ -650,7 +659,7 @@ router.get('/:sid/test', async(req, res) => {
           SpeechCredential.ttsTestResult(sid, false);
         }
       }
-      if (cred.use_for_stt) {
+      if (cred.use_for_stt && api_key) {
         try {
           await testDeepgramStt(logger, {api_key});
           results.stt.status = 'ok';