@talend/react-cmf/lib/selectors/toJS.js

A framework built on top of best react libraries

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = getToJSMemoized;
function toJS(data) {
  if (data) {
    if (typeof data.toJS === 'function') {
      return data.toJS();
    }
    throw new Error('the selector return a data which is not an immutable');
  }
  return undefined;
}

/**
 * toJS is an higher order selector.
 * It modify a given selector to return the value as a POJO
 * Note: your selector must use only one selector
 * @param {function} selector the selector
 * @returns the POJO associated to the given selector
 */
function getToJSMemoized(selector) {
  if (typeof selector !== 'function') {
    throw new Error('selector must be a function in cmf.selectors.toJS(selector)');
  }
  const cache = {};
  function memoize(func) {
    return (...args) => {
      if (cache.key === args[0]) {
        return cache.value;
      }
      cache.key = args[0];
      cache.value = func(...args);
      return cache.value;
    };
  }
  const toJSMemoized = memoize(toJS);
  return state => toJSMemoized(selector(state));
}
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