Subscribe support

Author: ikq

src/Constants.d.ts

@@ -57,7 +57,7 @@ export declare enum DTMF_TRANSPORT {
 }
 
 export const REASON_PHRASE: Record<number, string>
-export const ALLOWED_METHODS = 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY'
+export const ALLOWED_METHODS = 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY,SUBSCRIBE'
 export const ACCEPTED_BODY_TYPES = 'application/sdp, application/dtmf-relay'
 export const MAX_FORWARDS = 69
 export const SESSION_EXPIRES = 90

src/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,

src/Notifier.d.ts

@@ -0,0 +1,31 @@
+import {EventEmitter} from 'events'
+import {IncomingRequest} from './SIPMessage'
+
+declare enum NotifierTerminationReason {
+    NOTIFY_RESPONSE_TIMEOUT = 0,
+    NOTIFY_TRANSPORT_ERROR = 1,
+    NOTIFY_NON_OK_RESPONSE = 2,
+    NOTIFY_AUTHENTICATION_FAILED = 3,
+    FINAL_NOTIFY_SENT = 4,
+    UNSUBSCRIBE_RECEIVED = 5,
+    SUBSCRIPTION_EXPIRED = 6
+}
+
+export interface MessageEventMap {
+  terminated: [terminationCode: NotifierTerminationReason];
+  subscribe: [isUnsubscribe: boolean, request: IncomingRequest, body: string | undefined, contentType: string | undefined];
+  expired: [];
+}
+
+export class Notifier extends EventEmitter<MessageEventMap> {
+  start(): void;
+  setActiveState(): void;
+  notify(body?: string): void;
+  terminate(body?: string, reason?: string): void;
+  get state(): string;
+  get id(): string;
+  set data(_data: any);
+  get data(): any;
+  static get C(): typeof NotifierTerminationReason;
+  get C(): typeof NotifierTerminationReason;
+}