Subscribe support

gulpfile.js

@@ -105,7 +105,8 @@ gulp.task('test', function()
     'test/test-parser.js',
     'test/test-properties.js',
     'test/test-UA-no-WebRTC.js',
-    'test/test-digestAuthentication.js'
+    'test/test-digestAuthentication.js',
+    'test/test-UA-subscriber-notifier.js'
   ];
 
   return gulp.src(src)

lib/Constants.js

@@ -149,7 +149,7 @@ module.exports = {
     606 : 'Not Acceptable'
   },
 
-  ALLOWED_METHODS                  : 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY',
+  ALLOWED_METHODS                  : 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY,SUBSCRIBE',
   ACCEPTED_BODY_TYPES              : 'application/sdp, application/dtmf-relay',
   MAX_FORWARDS                     : 69,
   SESSION_EXPIRES                  : 90,

lib/Notifier.d.ts

@@ -0,0 +1,24 @@
+import {EventEmitter} from 'events'
+import {SUBSCRIBE, NOTIFY} from './Constants'
+import * as Utils from './Utils'
+
+declare enum NotifierTerminatedCode {
+    NOTIFY_RESPONSE_TIMEOUT = 0, 
+    NOTIFY_TRANSPORT_ERROR = 1, 
+    NOTIFY_NON_OK_RESPONSE = 2, 
+    NOTIFY_FAILED_AUTHENTICATION = 3,
+    SEND_FINAL_NOTIFY = 4, 
+    RECEIVE_UNSUBSCRIBE = 5, 
+    SUBSCRIPTION_EXPIRED = 6  
+}
+
+export class Notifier extends EventEmitter {
+  start(): void;
+  setActiveState(): void;
+  notify(body?: string): void; 
+  terminate(body?: string, reason?: string): void; 
+  get state(): string;
+  get id(): string;
+  static get C(): typeof NotifierTerminatedCode;
+  get C(): typeof NotifierTerminatedCode;
+}