add support for deepgram STT

lib/routes/api/speech-credentials.js

@@ -14,7 +14,8 @@ const {
   testMicrosoftTts,
   testWellSaidTts,
   testNuanceStt,
-  testNuanceTts
+  testNuanceTts,
+  testDeepgramStt
 } = require('../../utils/speech-utils');
 
 const obscureKey = (key) => {
@@ -88,6 +89,11 @@ const encryptCredential = (obj) => {
       const nuanceData = JSON.stringify({client_id, secret});
       return encrypt(nuanceData);
 
+    case 'deepgram':
+      assert(api_key, 'invalid deepgram speech credential: api_key is required');
+      const deepgramData = JSON.stringify({api_key});
+      return encrypt(deepgramData);
+
     default:
       assert(false, `invalid or missing vendor: ${vendor}`);
   }
@@ -175,6 +181,10 @@ router.get('/', async(req, res) => {
         obj.client_id = o.client_id;
         obj.secret = obscureKey(o.secret);
       }
+      else if ('deepgram' === obj.vendor) {
+        const o = JSON.parse(decrypt(credential));
+        obj.api_key = obscureKey(o.api_key);
+      }
       return obj;
     }));
   } catch (err) {
@@ -225,6 +235,10 @@ router.get('/:sid', async(req, res) => {
       obj.client_id = o.client_id;
       obj.secret = obscureKey(o.secret);
     }
+    else if ('deepgram' === obj.vendor) {
+      const o = JSON.parse(decrypt(credential));
+      obj.api_key = obscureKey(o.api_key);
+    }
     res.status(200).json(obj);
   } catch (err) {
     sysError(logger, res, err);
@@ -474,6 +488,19 @@ router.get('/:sid/test', async(req, res) => {
         }
       }
     }
+    else if (cred.vendor === 'deepgram') {
+      const {api_key} = credential;
+      if (cred.use_for_stt) {
+        try {
+          await testDeepgramStt(logger, {api_key});
+          results.stt.status = 'ok';
+          SpeechCredential.sttTestResult(sid, true);
+        } catch (err) {
+          results.stt = {status: 'fail', reason: err.message};
+          SpeechCredential.sttTestResult(sid, false);
+        }
+      }
+    }
     res.status(200).json(results);
   } catch (err) {
     sysError(logger, res, err);