lc-web-request/dist/cache.js

web请求服务器工具，避免重复请求，一段时间内的数据缓存在浏览器中。

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = exports.cache = void 0;
var _md = _interopRequireDefault(require("crypto-js/md5"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
var localData = {
  data: {},
  setItem: function setItem(key, value) {
    this.data[key] = value;
  },
  clear: function clear() {
    this.data = {};
  },
  getItem: function getItem(key) {
    return this.data[key];
  },
  removeItem: function removeItem(key) {
    this.data[key] = null;
  }
};
var getStorage = function getStorage() {
  if (!window || !window.localStorage) {
    return localData;
  } else {
    return window.localStorage;
  }
};
var TimeUnit = {
  SECONDS: 'SECONDS',
  MINUTES: 'MINUTES',
  HOURS: 'HOURS',
  DAYS: 'DAYS'
};
var LocalTimeUnit = {
  SECONDS: 1000,
  MINUTES: 1000 * 60,
  HOURS: 1000 * 60 * 60,
  DAYS: 1000 * 60 * 60 * 24
};
var removeItem = function removeItem(key) {
  if (typeof key !== 'string') {
    key = JSON.stringify(key);
  }
  getStorage().removeItem((0, _md["default"])(key).toString());
};
var saveStartTime = function saveStartTime(startTime) {
  if (getStartTime() > parseInt("".concat(startTime || '0'))) {
    return;
  }
  getStorage().setItem('startTime', startTime);
};
var getStartTime = function getStartTime() {
  return parseInt(getStorage().getItem('startTime') || '0');
};
var saveData = function saveData(config) {
  if (config && config.key && config.url && config.data) {
    var url = config.url;
    var key = config.key;
    var _cache = {
      url: url,
      key: key,
      persistent: config.persistent,
      startTime: getStartTime(),
      expires: !config.persistent ? new Date().getTime() + (config.expires || 3) * LocalTimeUnit[config.timeUnit || 'SECONDS'] : 0,
      data: config.data
    };
    getStorage().setItem(key, JSON.stringify(_cache));
  }
};
var expires = function expires() {
  var storage = getStorage();
  var data = storage.data || storage;
  for (var key in data) {
    var _cache2 = JSON.parse(storage.getItem(key));
    if (_cache2 && !_cache2.persistent && _cache2.expires < new Date().getTime()) {
      getStorage().removeItem(key);
    }
  }
};
var getData = function getData(key, callback) {
  var cache = JSON.parse(getStorage().getItem(key));
  if (cache) {
    if (cache.startTime < getStartTime()) {
      getStorage().removeItem(key);
      return;
    }
    if (cache.persistent || cache.expires >= new Date().getTime()) {
      return new Promise(function (resolve, reject) {
        if (callback) {
          callback(cache.data);
        }
        resolve(cache.data);
      });
    }
    getStorage().removeItem(key);
  }
};
var cache = exports.cache = function cache() {
  if (window) {
    setInterval(expires, LocalTimeUnit.MINUTES);
  }
  return {
    saveData: saveData,
    getData: getData,
    saveStartTime: saveStartTime,
    removeItem: removeItem,
    LocalTimeUnit: LocalTimeUnit,
    TimeUnit: TimeUnit
  };
};
var _default = exports["default"] = cache;