modern-api.storage/dist/index.cjs

localStorage enhancer

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

// index.ts
var StorageEnhancer = class {
  constructor(storage) {
    this.storage = storage;
  }
  hasItem(key) {
    return typeof this.storage.getItem(key) === "string";
  }
  staleItem(key) {
    if (!this.hasItem(key))
      return false;
    const { start, ttl } = this._parseValue(this.storage.getItem(key));
    return this._isStale(start, ttl);
  }
  getItem(key, { removeStale, updateAge } = {}) {
    if (!this.hasItem(key))
      return null;
    const { value, start, ttl } = this._parseValue(this.storage.getItem(key));
    if (this._isStale(start, ttl)) {
      removeStale && this.removeItem(key);
      return null;
    }
    if (updateAge)
      this.setItem(key, value, { ttl });
    return value;
  }
  setItem(key, value, { ttl } = {}) {
    this.storage.setItem(key, this._prependExpire(value, ttl));
  }
  getJson(key, options = {}) {
    try {
      return JSON.parse(this.getItem(key, options));
    } catch {
      return null;
    }
  }
  setJson(key, value, options = {}) {
    this.setItem(key, JSON.stringify(value), options);
  }
  removeItem(key) {
    this.storage.removeItem(key);
  }
  clear() {
    this.storage.clear();
  }
  _prependExpire(value, ttl) {
    return this._isNumber(ttl) ? `start:${+new Date()}:ttl:${ttl}:${value}` : value;
  }
  _parseValue(value) {
    const reg = /^start:(\d+):ttl:(\d+):/;
    const result = value.match(reg);
    return {
      value: value.replace(reg, ""),
      start: result && result[1],
      ttl: result && result[2]
    };
  }
  _isStale(start, ttl) {
    return this._isNumber(start) && this._isNumber(ttl) && Number(start) + Number(ttl) < +new Date();
  }
  _isNumber(n) {
    return !isNaN(parseFloat(n));
  }
};

exports.StorageEnhancer = StorageEnhancer;