package com.ots.common.utils;
import cn.hutool.core.collection.CollectionUtil;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

public class MapDataUtil {
    public static Map<String, Object> convertDataMap(HttpServletRequest request) {
        Map<String, String[]> properties = request.getParameterMap();
        Map<String, Object> returnMap = new HashMap<String, Object>();
        Iterator<?> entries = properties.entrySet().iterator();
        Map.Entry<?, ?> entry;
        String name = "";
        String value = "";
        while (entries.hasNext()) {
            entry = (Entry<?, ?>) entries.next();
            name = (String) entry.getKey();
            Object valueObj = entry.getValue();
            if (null == valueObj) {
                value = "";
            } else if (valueObj instanceof String[]) {
                String[] values = (String[]) valueObj;
                for (int i = 0; i < values.length; i++) {
                    value = values[i] + ",";
                }
                value = value.substring(0, value.length() - 1);
            } else {
                value = valueObj.toString();
            }
            returnMap.put(name, value);
        }
        return returnMap;
    }

    /**
     *  对传入的对象进行数据清洗，将属性值为null和""的去掉，其他字段名和属性值存入map集合
     *  requestParameters 为要转换为键值对的对象
     *  dynamicPara 转换后的键值对添加到的目标集合
     */
    public static void objectToMap(Object requestParameters,Map<String, Object> dynamicPara) throws IllegalAccessException {
        // 获取f对象对应类中的所有属性域
        Field[] fields = requestParameters.getClass().getDeclaredFields();
        for (Field field : fields) {
            String varName = field.getName();
            // 获取原来的访问控制权限
            boolean accessFlag = field.isAccessible();
            // 修改访问控制权限
            field.setAccessible(true);
            // 获取在对象f中属性fields[i]对应的对象中的变量
            Object obj = field.get(requestParameters);
            if (obj != null && StringUtils.isNotBlank(obj.toString()) || CollectionUtil.isNotEmpty((Iterable<?>) obj)) {
                dynamicPara.put(varName, obj);
                // 恢复访问控制权限
                field.setAccessible(accessFlag);
            }
        }
    }
}