client-search/src/controller.ts

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// tslint:disable-next-line:import-name
// import { bind } from 'helpful-decorators';
import Service from './service';

export default class Controller {
  protected params: HouseListParams = {};

  protected houseList: IHouseDetail[] = [];

  protected hasNext: boolean = true;

  protected service: Service;

  protected option: IOptions;

  constructor(option: IOptions) {
    this.option = option;
    this.service = new Service(this.fetch.bind(this));
  }

  protected async fetch<T>(input: string, init?: RequestInit): Promise<T> {
    if (!this.option.fetch) {
      throw new Error('提供 fetch polyfill');
    }

    if (!this.option.prefix_api) {
      throw new Error('提供接口前缀');
    }

    let url = input;
    if (!/^\w+:\/\//.test(url)) {
      url = this.option.prefix_api + url;
    }

    if (init) {
      init.headers = { ...init.headers, ['content-type']: 'application/json' };
    }

    const response = await this.option.fetch(url, init);
    const isSuccess = (response.status >= 200 && response.status < 300) || response.status === 304;
    const data = await response.json();

    if (!isSuccess || data.success === false) {
      return Promise.reject(data);
    }

    return Promise.resolve(data);
  }

  /**
   * 读取参数查询房源列表
   *
   * @protected
   * @param {boolean} [immediate=false] 本次查询是否直接查询
   * @returns {Promise<IHouseDetail[]>}
   * @memberof Controller
   */
  protected async fetchHouseListWithParams(immediate: boolean = false): Promise<IHouseDetail[]> {
    if (!immediate && !this.option.immediate && !this.params.beginDate && !this.params.endDate) {
      return [];
    }

    const data = await this.service.fetchHouseList(this.params);
    if (!data) {
      return [];
    }

    if (!this.params.pageNum || this.params.pageNum <= 1) {
      this.houseList = data.list;
    } else {
      this.houseList = [...this.houseList, ...data.list];
    }
    this.hasNext = data.hasNextPage;
    return data.list;
  }
}