Feature/vm detection (#137)

* initial changes for amd

* wip

* fix bug where transcripts were discarded

* a bit of refactoring, and adding support for avmd in config verb

* bug fixes

lib/utils/transcription-utils.js

@@ -0,0 +1,33 @@
+module.exports = (logger) => {
+  const normalizeTranscription = (evt, vendor, channel) => {
+    if ('aws' === vendor && Array.isArray(evt) && evt.length > 0) evt = evt[0];
+    if ('microsoft' === vendor) {
+      const nbest = evt.NBest;
+      const language_code = evt.PrimaryLanguage?.Language || this.language;
+      const alternatives = nbest ? nbest.map((n) => {
+        return {
+          confidence: n.Confidence,
+          transcript: n.Display
+        };
+      }) :
+        [
+          {
+            transcript: evt.DisplayText || evt.Text
+          }
+        ];
+
+      const newEvent = {
+        is_final: evt.RecognitionStatus === 'Success',
+        channel,
+        language_code,
+        alternatives
+      };
+      evt = newEvent;
+    }
+    evt.channel_tag = channel;
+    //logger.debug({evt}, 'normalized transcription');
+    return evt;
+  };
+
+  return {normalizeTranscription};
+};