mosaic/cjs/proxy.js

'use strict';

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

var helpers = require('./helpers.js');

const proxy = (root, callback) => {
  let proxyCache = new WeakMap();

  function createProxy(target, handler) {
    let proxy = proxyCache.get(target);
    if (proxy === undefined) {
      proxy = new Proxy(target, handler);
      proxyCache.set(target, proxy);
    }
    return proxy
  }

  const handler = {
    get(target, property) {
      if (["Object", "Array"].includes(helpers.typeOf(target[property]))) {
        return createProxy(target[property], handler)
      } else {
        return Reflect.get(...arguments)
      }
    },
    set(target, property, value) {
      if (value === target[property]) return true

      callback();
      return Reflect.set(...arguments)
    },
    deleteProperty() {
      callback();
      return Reflect.deleteProperty(...arguments)
    },
  };

  return new Proxy(root, handler)
};

exports.proxy = proxy;