feat: add onIMClient{On,Off}line hooks

Author: weakish

API.md

@@ -186,6 +186,8 @@ LeanEngine 中间件会为这些 Hook 函数检查「Hook 签名」，确保调
 * `AV.Cloud.onIMConversationAdd`
 * `AV.Cloud.onIMConversationRemove`
 * `AV.Cloud.onIMConversationUpdate`
+* `AV.Cloud.onIMClientOnline`
+* `AV.Cloud.onIMClientOffline`
 
 LeanEngine 中间件会为这些 Hook 函数检查「Hook 签名」，确保调用者的确是 LeanCloud 或本地调试时的命令行工具。
 

leanengine.d.ts

@@ -156,6 +156,8 @@ export namespace Cloud {
   export function onIMConversationAdd(handler: CloudFunction): void;
   export function onIMConversationRemove(handler: CloudFunction): void;
   export function onIMConversationUpdate(handler: CloudFunction): void;
+  export function onIMClientOnline(handler: CloudFunction): void;
+  export function onIMClientOffline(handler: CloudFunction): void;
 
   export function LeanCloudHeaders(options?: MiddlewareOptions): RequestHandler;
   export function CookieSession(options?: CookieSessionOptions): RequestHandler;

lib/utils.js

@@ -21,7 +21,9 @@ exports.realtimeHookMapping = {
   onIMConversationStarted: '_conversationStarted',
   onIMConversationAdd: '_conversationAdd',
   onIMConversationRemove: '_conversationRemove',
-  onIMConversationUpdate: '_conversationUpdate'
+  onIMConversationUpdate: '_conversationUpdate',
+  onIMClientOnline: '_clientOnline',
+  onIMClientOffline: '_clientOffline'
 };
 
 exports.unauthResp = function(res) {