/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

// @flow

import type { Grip } from "../types";

const IMMUTABLE_FIELDS = ["_root", "__ownerID", "__altered", "__hash"];
const REACT_FIELDS = ["_reactInternalInstance", "_reactInternalFiber"];

export function isImmutablePreview(result: ?Grip) {
  return result && isImmutable(result.preview);
}

export function isImmutable(result: ?Grip) {
  if (!result || typeof result.ownProperties != "object") {
    return;
  }

  const ownProperties = result.ownProperties;
  return IMMUTABLE_FIELDS.every(field =>
    Object.keys(ownProperties).includes(field)
  );
}

export function isReactComponent(result: ?Grip) {
  if (!result || typeof result.ownProperties != "object") {
    return;
  }

  const ownProperties = result.ownProperties;
  return REACT_FIELDS.some(field => Object.keys(ownProperties).includes(field));
}

export function isConsole(expression: string) {
  return /^console/.test(expression);
}