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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 *
 * =========================================================================================================
 *
 * This software consists of voluntary contributions made by many individuals on behalf of the
 * Apache Software Foundation. For more information on the Apache Software Foundation, please see
 * .
 *
 * +-------------------------------------------------------------------------------------------------------+
 * | License: http://www.apache.org/licenses/LICENSE-2.0.txt 										       |
 * | Author: Yong.Teng  													       |
 * | Copyright @ 2013-2023 Buession.com Inc.														       |
 * +-------------------------------------------------------------------------------------------------------+
 */
package com.buession.web.servlet.aop.handler;

import com.buession.aop.MethodInvocation;
import com.buession.core.validator.Validate;
import com.buession.web.aop.handler.AbstractHttpCacheAnnotationHandler;
import com.buession.web.http.HttpHeader;
import com.buession.web.http.response.annotation.HttpCache;
import com.buession.web.servlet.http.request.RequestUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletResponse;

/**
 * @author Yong.Teng
 */
public class ServletHttpCacheAnnotationHandler extends AbstractHttpCacheAnnotationHandler {

	private final static Logger logger = LoggerFactory.getLogger(ServletHttpCacheAnnotationHandler.class);

	public ServletHttpCacheAnnotationHandler() {
		super();
	}

	@Override
	public void execute(MethodInvocation mi, HttpCache httpCache) {
		HttpServletResponse response = RequestUtils.getResponse();
		if(response == null){
			logger.warn("HttpServletResponse is null");
			return;
		}

		boolean isSetCacheControl = false;

		if(Validate.hasText(httpCache.cacheControl())){
			response.setHeader(HttpHeader.CACHE_CONTROL.getValue(), httpCache.cacheControl());
			isSetCacheControl = true;
		}

		if(Validate.hasText(httpCache.expires()) && Validate.isNumeric(httpCache.expires())){
			response.setHeader(HttpHeader.EXPIRES.getValue(), httpCache.expires());

			if(isSetCacheControl == false){
				response.setHeader(HttpHeader.CACHE_CONTROL.getValue(), "max-age=" + httpCache.expires());
			}
		}

		if(Validate.hasText(httpCache.pragma())){
			response.setHeader(HttpHeader.PRAGMA.getValue(), httpCache.pragma());
		}
	}

}