house-middleware-sdk/utils/CacheUtil.js

58 hosue rn native sdk

import {
  AsyncStorage
} from 'react-native';
import DeviceStorage from './DeviceStorage';
import { encryptionMD5 } from './md5Util';

/**
 * 缓存类
 *
 * @author haojie
 * @version 2019-09-27
 */

const CITY_ID ='cityId';

export default class CacheUtil {

  static useCache = false;

  /**
   * 全局设置是否使用缓存
   * @param flag
   */
  static setUseCache(flag) {
    console.log(`----设置是否使用缓存----${flag}`);
    this.useCache = flag;
  }

  /**
   * 是否改变cityid
   * @param cityId
   * @returns {Promise<boolean>}
   */
  static hasChangeCity = async(cityId) => {
    const mCityId = await DeviceStorage.get(CITY_ID);
    console.log('cityId:' + cityId + '---oldCityId:' + mCityId);
    return mCityId !== cityId;
  };

  /**
   * 检测cityId 变了清除数据
   * @param cityId
   * @returns {Promise<void>}
   */
  static checkCityId = async (cityId) => {
    const flag = await this.hasChangeCity(cityId);
    console.log(`----检测城市是否改变----${flag}`);
    if (flag) {
      console.log('----城市切换清除缓存----');
      DeviceStorage.clear();
      DeviceStorage.save('cityId', cityId);
    }
  };

  /**
   * 存储数据
   * @param cacheKey
   * @param value
   */
  static saveCache = (cacheKey, value) => {
    const key = encryptionMD5(cacheKey);
    console.log('----存储缓存加密缓存key----' + key);
    DeviceStorage.saveDataForJson(key, value);
  };

  /**
   * 读取缓存
   * @param cacheKey
   * @returns {Promise<*>}
   */
  static loadCache = async (cacheKey) => {
    if (!this.useCache) {
      return null;
    }
    console.log('----原始缓存key----' + cacheKey);
    const key = encryptionMD5(cacheKey);
    console.log('----加密缓存key----' + key);
    return await DeviceStorage.getDataforJson(key);
  };
}