support assembly ai (#248)

* support assembly ai

* wip

* wip

lib/routes/api/speech-credentials.js

@@ -20,7 +20,8 @@ const {
   testSonioxStt,
   testIbmTts,
   testIbmStt,
-  testElevenlabs
+  testElevenlabs,
+  testAssemblyStt
 } = require('../../utils/speech-utils');
 const bent = require('bent');
 const {promisePool} = require('../../db');
@@ -211,6 +212,11 @@ const encryptCredential = (obj) => {
       const elevenlabsData = JSON.stringify({api_key, model_id});
       return encrypt(elevenlabsData);
 
+    case 'assemblyai':
+      assert(api_key, 'invalid assemblyai speech credential: api_key is required');
+      const assemblyaiData = JSON.stringify({api_key});
+      return encrypt(assemblyaiData);
+
     default:
       if (vendor.startsWith('custom:')) {
         const customData = JSON.stringify({auth_token, custom_stt_url, custom_tts_url});
@@ -335,6 +341,9 @@ function decryptCredential(obj, credential, logger) {
     obj.auth_token = obscureKey(o.auth_token);
     obj.custom_stt_url = o.custom_stt_url;
     obj.custom_tts_url = o.custom_tts_url;
+  } else if ('assemblyai' === obj.vendor) {
+    const o = JSON.parse(decrypt(credential));
+    obj.api_key = obscureKey(o.api_key);
   }
 }
 
@@ -757,6 +766,18 @@ router.get('/:sid/test', async(req, res) => {
           SpeechCredential.ttsTestResult(sid, false);
         }
       }
+    } else if (cred.vendor === 'assemblyai') {
+      const {api_key} = credential;
+      if (cred.use_for_stt) {
+        try {
+          await testAssemblyStt(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);