package util

import (
	"reflect"
)

// 删除一个 struct 中为 nil 或 "" 的元素
func DeleteNilItems(obj interface{}) interface{} {
	sVal := reflect.ValueOf(obj)
	sType := reflect.TypeOf(obj)
	var returnMap map[string]interface{}
	returnMap = make(map[string]interface{})
	if sType.Kind() == reflect.Ptr {
		//用Elem()获得实际的value
		sVal = sVal.Elem()
		sType = sType.Elem()
	}
	num := sVal.NumField()
	for i := 0; i < num; i++ {
		f := sType.Field(i)
		val := sVal.Field(i).Interface()
		switch val.(type) {
		case string:
			if val.(string) != "" {
				returnMap[f.Name] = val
			}
		default:
			returnMap[f.Name] = val
		}
	}
	return returnMap
}