feat assembly (#515)

* fix

* wip

* wip

* wip

* wip

* fix review comments

lib/utils/transcription-utils.js

@@ -8,8 +8,9 @@ const {
   SonioxTranscriptionEvents,
   NvidiaTranscriptionEvents,
   CobaltTranscriptionEvents,
-  JambonzTranscriptionEvents
-} = require('./constants');
+  JambonzTranscriptionEvents,
+  AssemblyAiTranscriptionEvents
+} = require('./constants.json');
 
 const stickyVars = {
   google: [
@@ -104,6 +105,10 @@ const stickyVars = {
   soniox: [
     'SONIOX_PROFANITY_FILTER',
     'SONIOX_MODEL'
+  ],
+  assemblyai: [
+    'ASSEMBLYAI_API_KEY',
+    'ASSEMBLYAI_WORD_BOOST'
   ]
 };
 
@@ -692,6 +697,14 @@ module.exports = (logger) => {
         ...(cobaltOptions.enableConfusionNetwork && {COBALT_ENABLE_CONFUSION_NETWORK: 1}),
         ...(cobaltOptions.compiledContextData && {COBALT_COMPILED_CONTEXT_DATA: cobaltOptions.compiledContextData}),
       };
+    } else if ('assemblyai' === vendor) {
+      opts = {
+        ...opts,
+        ...(sttCredentials.api_key) &&
+          {ASSEMBLYAI_API_KEY: sttCredentials.api_key},
+        ...(rOpts.hints?.length > 0 &&
+          {ASSEMBLYAI_WORD_BOOST: JSON.stringify(rOpts.hints)})
+      };
     }
     else if (vendor.startsWith('custom:')) {
       let {options = {}} = rOpts;
@@ -755,6 +768,10 @@ module.exports = (logger) => {
     ep.removeCustomEventListener(JambonzTranscriptionEvents.ConnectFailure);
 
     ep.removeCustomEventListener(JambonzTranscriptionEvents.Error);
+
+    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.Transcription);
+    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.Connect);
+    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.ConnectFailure);
   };
 
   const setSpeechCredentialsAtRuntime = (recognizer) => {