caimei365-www/src/main/java/com/caimei/www/service/impl/ArticleServiceImpl.java

package com.caimei.www.service.impl;

import com.caimei.www.mapper.AccountDao;
import com.caimei.www.mapper.ArticleDao;
import com.caimei.www.pojo.JsonModel;
import com.caimei.www.pojo.page.BaseLink;
import com.caimei.www.service.ArticleService;
import com.caimei.www.utils.PriceUtil;
import io.netty.util.internal.MathUtil;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.math.BigDecimal;
import java.util.List;

/**
 * Description
 *
 * @date : 2020/8/10
 * @author : Charles
 */
@Service
public class ArticleServiceImpl implements ArticleService {
    @Resource
    private ArticleDao articleDao;

    /**
     * 获取文章热门标签
     */
    @Override
    public JsonModel<List<BaseLink>> getArticleLabels() {
        // 获取最高点击量
        Integer topClickRate = articleDao.getTopClickRate();
        // 获取热门标签
        List<BaseLink> labels = articleDao.getArticleLabels();
        double opacityParam = 0.5f;
        labels.forEach(label -> {
            double opacity = PriceUtil.mul(PriceUtil.div(label.getSort(), topClickRate), (1-opacityParam)).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + opacityParam;
            label.setSort(opacity);
        });
        return JsonModel.success(labels);
    }
}