added initial support for REST-initiated outdials

lib/session/rest-call-session.js

@@ -0,0 +1,34 @@
+const CallSession = require('./call-session');
+const {CallStatus} = require('../utils/constants');
+const moment = require('moment');
+
+class RestCallSession extends CallSession {
+  constructor({logger, application, srf, req, ep, tasks, callInfo}) {
+    super({
+      logger,
+      application,
+      srf,
+      callSid: callInfo.callSid,
+      tasks,
+      callInfo
+    });
+    this.req = req;
+    this.ep = ep;
+  }
+
+  setDialog(dlg) {
+    this.dlg = dlg;
+    dlg.on('destroy', this._callerHungup.bind(this));
+    dlg.connectTime = moment();
+  }
+
+  _callerHungup() {
+    const duration = moment().diff(this.dlg.connectTime, 'seconds');
+    this.emit('callStatusChange', {callStatus: CallStatus.Completed, duration});
+    this.logger.debug('InboundCallSession: caller hung up');
+    this._callReleased();
+  }
+
+}
+
+module.exports = RestCallSession;