新增：用户上下线事件推送

src/com/zchd/zim/ImChatService.java

@@ -201,7 +201,7 @@ public class ImChatService extends BaseService {
         zhub.broadcast("im:channel:" + message.buildChannelid(), message);
     }
 
-    private String getGuserid(int userid) {
+    protected String getGuserid(int userid) {
         if (userid == 0) {
             return "0";
         }

src/com/zchd/zim/ImMessageMonitor.java

@@ -74,6 +74,8 @@ public class ImMessageMonitor extends BaseService {
         list.forEach(x -> {
             subscribeChannel(userid, x.buildChannelid());
         });
+        // 推送上线状态
+        zhub.publish("im:online", chatService.getGuserid(userid));
 
         // 开启对点订阅
         zhub.subscribe("im:friend:" + userid, new TypeToken<FriendMessage>() {
@@ -91,6 +93,8 @@ public class ImMessageMonitor extends BaseService {
 
         // 取消点对点订阅
         zhub.unsubscribe("im:friend:" + userid);
+        // 推送离线状态
+        zhub.publish("im:offline", chatService.getGuserid(userid));
 
         // 取消频道订阅
         List<ChannelUser> list = chatService.userChannels(userid);