添加撤回群发消息功能

broker/src/main/java/io/moquette/imhandler/IMHandler.java

@@ -268,4 +268,13 @@ abstract public class IMHandler<T> {
         mServer.getImBusinessScheduler().execute(() -> publisher.publish2Receivers(updatedMessage, notifyReceivers, clientID, ProtoConstants.PullType.Pull_Normal));
         return notifyReceivers.size();
     }
+    protected long publishRecallMultiCastMsg(long messageUid, List<String> receivers) {
+        WFCMessage.Message updatedMessage = m_messagesStore.getMessage(messageUid);
+
+        Set<String> notifyReceivers = new HashSet<>(receivers);
+        LOG.info("Multicast recall receiver count: {}", notifyReceivers.size());
+        mServer.getImBusinessScheduler().execute(() -> publisher.publish2Receivers(updatedMessage, notifyReceivers, null, ProtoConstants.PullType.Pull_Normal, false));
+
+        return notifyReceivers.size();
+    }
 }

broker/src/main/java/io/moquette/imhandler/RecallMultiCastMessageHandler.java

@@ -0,0 +1,36 @@
+/*
+ * This file is part of the Wildfire Chat package.
+ * (c) Heavyrain2012 <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+package io.moquette.imhandler;
+
+import cn.wildfirechat.common.ErrorCode;
+import cn.wildfirechat.proto.WFCMessage;
+import io.moquette.spi.impl.Qos1PublishHandler;
+import io.netty.buffer.ByteBuf;
+import win.liyufan.im.IMTopic;
+
+@Handler(value = IMTopic.RecallMultiCastMessageTopic)
+public class RecallMultiCastMessageHandler extends IMHandler<WFCMessage.RecallMultiCastMessageRequest> {
+    @Override
+    public ErrorCode action(ByteBuf ackPayload, String clientID, String fromUser, boolean isAdmin, WFCMessage.RecallMultiCastMessageRequest request, Qos1PublishHandler.IMCallback callback) {
+        if (!isAdmin) {
+            return ErrorCode.ERROR_CODE_NOT_RIGHT;
+        }
+
+        ErrorCode errorCode = m_messagesStore.recallCastMessage(request.getMessageId(), fromUser);
+
+        if(errorCode != ErrorCode.ERROR_CODE_SUCCESS) {
+            return errorCode;
+        }
+
+        publishRecallMultiCastMsg(request.getMessageId(), request.getReceiverList());
+
+        return errorCode;
+    }
+
+}