package io.moquette.spi.impl;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.moquette.server.netty.NettyUtils;
import io.moquette.spi.security.IAuthorizator;
import io.netty.channel.Channel;

abstract class QosPublishHandler {
	
	private static final Logger LOG = LoggerFactory.getLogger(QosPublishHandler.class);
	
	private final IAuthorizator m_authorizator;
	
	protected QosPublishHandler(IAuthorizator m_authorizator) {
		this.m_authorizator = m_authorizator;
	}

	public boolean checkWriteOnTopic(String topic, Channel channel) {
		String clientID = NettyUtils.clientID(channel);
		String username = NettyUtils.userName(channel);
		if (!m_authorizator.canWrite(topic, username, clientID)) {
			LOG.error("The MQTT client is not authorized to publish on topic. MqttClientId = {}, topic = {}.", clientID,
					topic);
			return true;
		}
		return false;
	}
}