缓存工具方法

export default {
  // 此处expire是秒数
  set(key: string, val: any, expire?: number | null) {
    try {
      let curTime = new Date().getTime();
      expire = expire ? 1000 * expire : null;
      wx.setStorageSync(
        key,
        JSON.stringify({
          data: val,
          saveTime: curTime,
          expire,
        })
      );
    } catch (e) {
      console.error("缓存设置失败", e);
    }
  },

  // 判断是否过期
  expired(key: string) {
    try {
      const data = wx.getStorageSync(key);
      if (data) {
        const dataObj = JSON.parse(data);
        if (
          dataObj.expire &&
          new Date().getTime() - dataObj.saveTime > dataObj.expire
        ) {
          return true;
        } else {
          return false;
        }
      }
      return;
    } catch (e) {
      console.error(e);
      return;
    }
  },

  directGet(key: string) {
    try {
      const data = wx.getStorageSync(key);
      if (data) {
        const dataObj = JSON.parse(data);
        return dataObj.data;
      }
      return null;
    } catch (e) {
      console.error("获取缓存失败", e);
    }
  },

  get(key: string) {
    try {
      const data = wx.getStorageSync(key);
      if (data) {
        const dataObj = JSON.parse(data);
        if (
          dataObj.expire &&
          new Date().getTime() - dataObj.saveTime > dataObj.expire
        ) {
          this.remove(key);
          return null;
        } else {
          return dataObj.data;
        }
      }
      return null;
    } catch (e) {
      console.error("获取缓存失败", e);
    }
  },

  remove(key: string) {
    try {
      wx.removeStorageSync(key);
    } catch (e) {
      console.error("缓存清除失败", e);
    }
  },

  clear() {
    try {
      wx.clearStorage();
    } catch (e) {
      console.error("缓存清空失败", e);
    }
  },
};