class LoadRemoteMessagesHandler extends IMHandler<WFCMessage.LoadRemoteMessages> {
    @Override
    public ErrorCode action(ByteBuf ackPayload, String clientID, String fromUser, ProtoConstants.RequestSourceType requestSourceType, WFCMessage.LoadRemoteMessages request, Qos1PublishHandler.IMCallback callback) {<FILL_FUNCTION_BODY>}
}

        ErrorCode errorCode = ErrorCode.ERROR_CODE_SUCCESS;

        long beforeUid = request.getBeforeUid();
        if (beforeUid == 0) {
            beforeUid = Long.MAX_VALUE;
        }

        if (request.getConversation().getType() == ProtoConstants.ConversationType.ConversationType_Group) {
            if (!m_messagesStore.isMemberInGroup(fromUser, request.getConversation().getTarget())) {
                return ErrorCode.ERROR_CODE_NOT_IN_GROUP;
            }
        }

        if (request.getConversation().getType() == ProtoConstants.ConversationType.ConversationType_Channel) {
            if (!m_messagesStore.canSendMessageInChannel(fromUser, request.getConversation().getTarget())) {
                return ErrorCode.ERROR_CODE_NOT_IN_CHANNEL;
            }
        }

        WFCMessage.PullMessageResult result = m_messagesStore.loadRemoteMessages(fromUser, request.getConversation(), beforeUid, request.getCount(), request.getContentTypeList());
        byte[] data = result.toByteArray();
        LOG.info("User {} load message with count({}), payload size({})", fromUser, result.getMessageCount(), data.length);
        ackPayload.ensureWritable(data.length).writeBytes(data);
        return errorCode;
    
<methods>public void <init>() ,public abstract cn.wildfirechat.common.ErrorCode action(ByteBuf, java.lang.String, java.lang.String, cn.wildfirechat.proto.ProtoConstants.RequestSourceType, cn.wildfirechat.proto.WFCMessage.LoadRemoteMessages, io.moquette.spi.impl.Qos1PublishHandler.IMCallback) ,public void afterAction(java.lang.String, java.lang.String, java.lang.String, io.moquette.spi.impl.Qos1PublishHandler.IMCallback) ,public void doHandler(java.lang.String, java.lang.String, java.lang.String, byte[], io.moquette.spi.impl.Qos1PublishHandler.IMCallback, cn.wildfirechat.proto.ProtoConstants.RequestSourceType) ,public static io.moquette.spi.impl.MessagesPublisher getPublisher() ,public static void init(io.moquette.spi.IMessagesStore, io.moquette.spi.ISessionsStore, io.moquette.spi.impl.MessagesPublisher, cn.wildfirechat.server.ThreadPoolExecutorWrapper, io.moquette.server.Server) ,public cn.wildfirechat.common.ErrorCode preAction(java.lang.String, java.lang.String, java.lang.String, io.moquette.spi.impl.Qos1PublishHandler.IMCallback, cn.wildfirechat.proto.ProtoConstants.RequestSourceType) <variables>protected static final Logger LOG,protected static java.lang.String actionName,private Class#RAW dataCls,private static win.liyufan.im.RateLimiter mLimitCounter,protected static io.moquette.server.Server mServer,private static cn.wildfirechat.server.ThreadPoolExecutorWrapper m_imBusinessExecutor,protected static io.moquette.spi.IMessagesStore m_messagesStore,protected static io.moquette.spi.ISessionsStore m_sessionsStore,private java.lang.reflect.Method parseDataMethod,protected static io.moquette.spi.impl.MessagesPublisher publisher