#1088 ignore UtteranceEnd if we have unprocessed words (#1089)

* #1088 ignore UtteranceEnd if we have unprocessed words

* wip

lib/tasks/dial.js

@@ -500,8 +500,10 @@ class TaskDial extends Task {
       'X-Account-Sid': cs.accountSid,
       ...(req && req.has('X-CID') && {'X-CID': req.get('X-CID')}),
       ...(direction === 'outbound' && callInfo.sbcCallid && {'X-CID': callInfo.sbcCallid}),
-      ...(req && req.has('P-Asserted-Identity') && !JAMBONZ_DISABLE_DIAL_PAI_HEADER &&
-        {'P-Asserted-Identity': req.get('P-Asserted-Identity')}),
+      ...(!JAMBONZ_DISABLE_DIAL_PAI_HEADER && req && {
+        ...(req.has('P-Asserted-Identity') && {'P-Asserted-Identity': req.get('P-Asserted-Identity')}),
+        ...(req.has('Privacy') && {'Privacy': req.get('Privacy')}),
+      }),
       ...(req && req.has('X-Voip-Carrier-Sid') && {'X-Voip-Carrier-Sid': req.get('X-Voip-Carrier-Sid')}),
       // Put headers at the end to make sure opt.headers override all default behavior.
       ...this.headers

lib/tasks/gather.js

@@ -757,10 +757,16 @@ class TaskGather extends SttTask {
         this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram but no buffered transcripts');
       }
       else {
-        this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram, return buffered transcript');
-        evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
-        this._bufferedTranscripts = [];
-        this._resolve('speech', evt);
+        const utteranceTime = evt.last_word_end;
+        if (utteranceTime && this._dgTimeOfLastUnprocessedWord && utteranceTime < this._dgTimeOfLastUnprocessedWord) {
+          this.logger.debug('Gather:_onTranscription - got UtteranceEnd with unprocessed words, continue listening');
+        }
+        else {
+          this.logger.debug('Gather:_onTranscription - got UtteranceEnd from deepgram, return buffered transcript');
+          evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
+          this._bufferedTranscripts = [];
+          this._resolve('speech', evt);
+        }
       }
       return;
     }
@@ -893,8 +899,21 @@ class TaskGather extends SttTask {
         if (originalEvent.is_final && evt.alternatives[0].transcript !== '') {
           this.logger.debug({evt}, 'Gather:_onTranscription - buffering a completed (partial) deepgram transcript');
           this._bufferedTranscripts.push(evt);
+          this._dgTimeOfLastUnprocessedWord = null;
+        }
+        if (evt.alternatives[0].transcript === '') {
+          emptyTranscript = true;
+        }
+        else if (!originalEvent.is_final) {
+          /* Deepgram: we have unprocessed words-save last word end time so we can later compare to UtteranceEnd */
+          const words = originalEvent.channel.alternatives[0].words;
+          if (words?.length > 0) {
+            this._dgTimeOfLastUnprocessedWord = words.slice(-1)[0].end;
+            this.logger.debug(
+              `TaskGather:_onTranscription - saving word end time: ${this._dgTimeOfLastUnprocessedWord}`);
+          }
+
         }
-        if (evt.alternatives[0].transcript === '') emptyTranscript = true;
       }
 
       if (!emptyTranscript) {