add support for autoscaling SBC SIP servers; bugfix: synthAudio calls must past stats obj

lib/tasks/dialogflow/index.js

@@ -210,6 +210,7 @@ class Dialogflow extends Task {
     /* if we are using tts and a message was provided, play it out */
     if (this.vendor && intent.fulfillmentText && intent.fulfillmentText.length > 0) {
       const {srf} = cs;
+      const {stats} = srf.locals;
       const {synthAudio} = srf.locals.dbHelpers;
       this.waitingForPlayStart = false;
 
@@ -229,7 +230,7 @@ class Dialogflow extends Task {
           credentials: this.ttsCredentials
         };
         this.logger.debug({obj}, 'Dialogflow:_onIntent - playing message via tts');
-        const {filePath, servedFromCache} = await synthAudio(obj);
+        const {filePath, servedFromCache} = await synthAudio(stats, obj);
         if (filePath) cs.trackTmpFile(filePath);
         if (!this.ttsCredentials && !servedFromCache) cs.billForTts(intent.fulfillmentText.length);
 

lib/tasks/lex.js

@@ -182,12 +182,13 @@ class Lex extends Task {
       const type = messages[0].type;
       if (['PlainText', 'SSML'].includes(type) && msg) {
         const {srf} = cs;
+        const {stats} = srf.locals;
         const {synthAudio} = srf.locals.dbHelpers;
 
         try {
           this.logger.debug(`tts with ${this.vendor} ${this.voice}`);
           // eslint-disable-next-line no-unused-vars
-          const {filePath, servedFromCache} = await synthAudio({
+          const {filePath, servedFromCache} = await synthAudio(stats, {
             text: msg,
             vendor: this.vendor,
             language: this.language,

lib/tasks/say.js

@@ -19,7 +19,7 @@ class TaskSay extends Task {
 
     const {srf} = cs;
     const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, srf);
-    const {writeAlerts, AlertType} = srf.locals;
+    const {writeAlerts, AlertType, stats} = srf.locals;
     const {synthAudio} = srf.locals.dbHelpers;
     const vendor = this.synthesizer.vendor || cs.speechSynthesisVendor;
     const language = this.synthesizer.language || cs.speechSynthesisLanguage;
@@ -27,6 +27,7 @@ class TaskSay extends Task {
     const salt = cs.callSid;
     const credentials = cs.getSpeechCredentials(vendor, 'tts');
 
+    this.logger.info({vendor, credentials}, 'Task:say - using vendor');
     this.ep = ep;
     try {
       if (!credentials) {
@@ -40,7 +41,7 @@ class TaskSay extends Task {
       // synthesize all of the text elements
       let lastUpdated = false;
       const filepath = (await Promise.all(this.text.map(async(text) => {
-        const {filePath, servedFromCache} = await synthAudio({
+        const {filePath, servedFromCache} = await synthAudio(stats, {
           text,
           vendor,
           language,