add support for ms teams

lib/utils/place-outdial.js

@@ -58,13 +58,24 @@ class SingleDialer extends Emitter {
   }
 
   async exec(srf, ms, opts) {
+    opts = opts || {};
     let uri, to;
     try {
       switch (this.target.type) {
         case 'phone':
+        case 'teams':
           assert(this.target.number);
           uri = `sip:${this.target.number}@${this.sbcAddress}`;
           to = this.target.number;
+          if ('teams' === this.target.type) {
+            assert(this.target.teamsInfo);
+            opts.headers = opts.headers || {};
+            Object.assign(opts.headers, {
+              'X-MS-Teams-FQDN': this.target.teamsInfo.ms_teams_fqdn,
+              'X-MS-Teams-Tenant-FQDN': this.target.teamsInfo.tenant_fqdn
+            });
+            if (this.target.vmail === true) uri = `${uri};opaque=app:voicemail`;
+          }
           break;
         case 'user':
           assert(this.target.name);
@@ -156,12 +167,23 @@ class SingleDialer extends Emitter {
       this.logger.debug(`SingleDialer:exec call connected: ${this.callSid}`);
       const connectTime = this.dlg.connectTime = moment();
 
-      this.dlg.on('destroy', () => {
-        const duration = moment().diff(connectTime, 'seconds');
-        this.logger.debug('SingleDialer:exec called party hung up');
-        this.emit('callStatusChange', {callStatus: CallStatus.Completed, duration});
-        this.ep.destroy();
-      });
+      this.dlg
+        .on('destroy', () => {
+          const duration = moment().diff(connectTime, 'seconds');
+          this.logger.debug('SingleDialer:exec called party hung up');
+          this.emit('callStatusChange', {callStatus: CallStatus.Completed, duration});
+          this.ep.destroy();
+        })
+        .on('refresh', () => this.logger.info('SingleDialer:exec - dialog refreshed by uas'))
+        .on('modify', async(req, res) => {
+          try {
+            const newSdp = await this.ep.modify(req.body);
+            res.send(200, {body: newSdp});
+            this.logger.info({offer: req.body, answer: newSdp}, 'SingleDialer:exec: handling reINVITE');
+          } catch (err) {
+            this.logger.error(err, 'Error handling reinvite');
+          }
+        });
 
       if (this.confirmHook) this._executeApp(this.confirmHook);
       else this.emit('accept');