package com.xjs.config;

import org.apache.commons.lang3.StringUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;

/**
 * 自定义国际化解析器
 *
 * @author xiejs
 * @since 2022-02-09
 */
@Configuration
public class LocaleResolverConfig implements LocaleResolver {
    @Override
    public Locale resolveLocale(HttpServletRequest httpServletRequest) {
        // 获取页面手动切换传递的语言参数l
        String l = httpServletRequest.getParameter("l");
        // 获取请求头自动传递的语言参数Accept-Language
        String header = httpServletRequest.getHeader("Accept-Language");
        Locale locale = null;
        // 如果手动切换参数不为空，就根据手动参数进行语言切换，否则默认根据请求头信息切换
        if (!StringUtils.isEmpty(l)) {
            String[] split = l.split("_");
            locale = new Locale(split[0], split[1]);
        } else {
        // Accept-Language: en-US,en;q=0.9
            String[] splits = header.split(",");
            String[] split = splits[0].split("-");
            locale = new Locale(split[0], split[1]);
        }
        return locale;
    }

    @Override
    public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {

    }

    @Bean
    public LocaleResolver localeResolver(){
        return new LocaleResolverConfig();
    }
}