/**
 * Copyright 2023 The MediaPipe Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/** Returns whether the underlying rendering engine is WebKit. */
export function isWebKit(browser = navigator) {
  const userAgent = browser.userAgent;
  // Note that this returns true for Chrome on iOS (which is running WebKit) as
  // it uses "CriOS".
  return userAgent.includes('Safari') && !userAgent.includes('Chrome');
}

/** Detect if code is running on iOS. */
export function isIOS() {
  // Source:
  // https://stackoverflow.com/questions/9038625/detect-if-device-is-ios
  return [
    'iPad Simulator', 'iPhone Simulator', 'iPod Simulator', 'iPad', 'iPhone',
    'iPod'
    // tslint:disable-next-line:deprecation
  ].includes(navigator.platform)
      // iPad on iOS 13 detection
      || (navigator.userAgent.includes('Mac') && 'ontouchend' in document);
}