import { createRequestParamDecorator } from '@midwayjs/core';
import { get, pick, omit } from 'lodash';
import { QueryMapping, QueryReset } from '../frame/QueryUtils';
const pageKeys = ['skip', 'limit'];
/**将query的skip和limit提取到object中返回 */
export const Page = () => {
  return createRequestParamDecorator(ctx => {
    const query = get(ctx, 'query', {});
    const page = pick(query, pageKeys);
    return page;
  });
};
/**将query中的skip和limit剃除,整理查询参数的值和键的映射 */
export const Query = (mapping?: object) => {
  return createRequestParamDecorator(ctx => {
    const query = get(ctx, 'query', {});
    let filter: object = omit(query, pageKeys);
    // 先处理参数的查询方式
    filter = QueryReset(filter);
    // 再处理mapping的字段映射
    filter = QueryMapping(filter, mapping);
    return filter;
  });
};