feat: record all calls (#352)

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* fix jslint

* fix

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* fix: add file ext

* fix: record format

* fix outbound

* update to drachtio-fsmrf with support for multiple recording streams on a call

* enable DTMF during background listen recording

* fix merge commit

---------

Co-authored-by: Dave Horton <daveh@beachdognet.com>

lib/session/call-session.js

@@ -19,7 +19,10 @@ const HttpRequestor = require('../utils/http-requestor');
 const WsRequestor = require('../utils/ws-requestor');
 const {
   JAMBONES_INJECT_CONTENT,
-  AWS_REGION
+  AWS_REGION,
+  JAMBONZ_RECORD_WS_BASE_URL,
+  JAMBONZ_RECORD_WS_USERNAME,
+  JAMBONZ_RECORD_WS_PASSWORD,
 } = require('../config');
 const BADPRECONDITIONS = 'preconditions not met';
 const CALLER_CANCELLED_ERR_MSG = 'Response not sent due to unknown transaction';
@@ -132,6 +135,11 @@ class CallSession extends Emitter {
     return this.callInfo.callStatus;
   }
 
+  get isBackGroundListen() {
+    return !(this.backgroundListenTask === null ||
+    this.backgroundListenTask === undefined);
+  }
+
   /**
    * SIP call-id for the call
    */
@@ -495,7 +503,7 @@ class CallSession extends Emitter {
     }
   }
 
-  async startBackgroundListen(opts) {
+  async startBackgroundListen(opts, bugname) {
     if (this.isListenEnabled) {
       this.logger.info('CallSession:startBackgroundListen - listen is already enabled, ignoring request');
       return;
@@ -504,8 +512,9 @@ class CallSession extends Emitter {
       this.logger.debug({opts}, 'CallSession:startBackgroundListen');
       const t = normalizeJambones(this.logger, [opts]);
       this.backgroundListenTask = makeTask(this.logger, t[0]);
+      this.backgroundListenTask.bugname = bugname;
       const resources = await this._evaluatePreconditions(this.backgroundListenTask);
-      const {span, ctx} = this.rootSpan.startChildSpan(`background-gather:${this.backgroundListenTask.summary}`);
+      const {span, ctx} = this.rootSpan.startChildSpan(`background-listen:${this.backgroundListenTask.summary}`);
       this.backgroundListenTask.span = span;
       this.backgroundListenTask.ctx = ctx;
       this.backgroundListenTask.exec(this, resources)
@@ -528,6 +537,7 @@ class CallSession extends Emitter {
   }
 
   async stopBackgroundListen() {
+    this.logger.debug('CallSession:stopBackgroundListen');
     try {
       if (this.backgroundListenTask) {
         this.backgroundListenTask.removeAllListeners();
@@ -536,7 +546,6 @@ class CallSession extends Emitter {
     } catch (err) {
       this.logger.info({err}, 'CallSession:stopBackgroundListen - Error stopping listen task');
     }
-    this.backgroundListenTask = null;
   }
 
   async enableBotMode(gather, autoEnable) {
@@ -1341,7 +1350,10 @@ class CallSession extends Emitter {
       }
 
       // we are going from an early media connection to answer
-      await this.propagateAnswer();
+      if (this.direction === CallDirection.Inbound) {
+        // only do this for inbound call.
+        await this.propagateAnswer();
+      }
       return {
         ...resources,
         ...(this.isSipRecCallSession && {ep2: this.ep2})
@@ -1512,7 +1524,6 @@ class CallSession extends Emitter {
       }
       this.dlg.on('modify', this._onReinvite.bind(this));
       this.dlg.on('refer', this._onRefer.bind(this));
-
       this.logger.debug(`CallSession:propagateAnswer - answered callSid ${this.callSid}`);
     }
   }
@@ -1749,6 +1760,13 @@ class CallSession extends Emitter {
   async _notifyCallStatusChange({callStatus, sipStatus, sipReason, duration}) {
     if (this.callMoved) return;
 
+    if (callStatus === CallStatus.InProgress) {
+      // nice, call is in progress, good time to enable record
+      await this.enableRecordAllCall();
+    } else if (callStatus == CallStatus.Completed && this.isBackGroundListen) {
+      await this.stopBackgroundListen();
+    }
+
     /* race condition: we hang up at the same time as the caller */
     if (callStatus === CallStatus.Completed) {
       if (this.notifiedComplete) return;
@@ -1779,6 +1797,23 @@ class CallSession extends Emitter {
       .catch((err) => this.logger.error(err, 'redis error'));
   }
 
+  async enableRecordAllCall() {
+    if (this.accountInfo.account.record_all_calls || this.application.record_all_calls) {
+      const listenOpts = {
+        url: `${JAMBONZ_RECORD_WS_BASE_URL}/record/${this.accountInfo.account.bucket_credential.vendor}`,
+        wsAuth: {
+          username: JAMBONZ_RECORD_WS_USERNAME,
+          password: JAMBONZ_RECORD_WS_PASSWORD
+        },
+        mixType : 'stereo',
+        passDtmf: true
+      };
+
+      this.logger.debug({listenOpts}, 'Record all calls: enabling listen');
+      await this.startBackgroundListen({verb: 'listen', ...listenOpts}, 'jambonz-session-record');
+    }
+  }
+
   /**
    * notifyTaskError - only used when websocket connection is used instead of webhooks
    */