registry.service.js

/**
 * simple memoize registry
 */
const ApplicationRegistry = {
  instance: Object.create(null),

  getInstance() {
    return this.instance;
  },
};

ApplicationRegistry.instance.dataSet = function dataSet(group, key, value) {
  if (!this[group]) {
    this[group] = {};
  }
  this[group][key] = value;
};

ApplicationRegistry.instance.dataGet = function dataGet(group, key) {
  if (!this[group]) {
    this[group] = {};
    return null;
  }
  return key ? this[group][key] : this[group];
};

ApplicationRegistry.instance.dataHas = function dataHas(group, key) {
  if (!this[group]) {
    this[group] = {};
    return false;
  }
  return Boolean(this[group][key]);
};

/**
 * @type {{
    dataSet: (group: string, key: string, value: string|number) => void,
    dataGet: (group: string, key:? string) => string|number|Object<string, string|number>,
    dataHas: (group: string, key: string) => boolean
  }}
 */
const appRegistry = (typeof window !== 'undefined')
  ? ((() => {
    if (!window['___application-registry___']) {
      window['___application-registry___'] = ApplicationRegistry.getInstance();
    }
    return window['___application-registry___'];
  })())
  : ApplicationRegistry.getInstance();

module.exports = appRegistry;