/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */

import * as React from 'react';
import styles from './LoadingAnimation.css';

type Props = {
  className?: string,
};

export default function LoadingAnimation({className = ''}: Props): React.Node {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      className={`${styles.Icon} ${className}`}
      width="24"
      height="24"
      viewBox="0 0 100 100">
      <path d="M0 0h100v100H0z" fill="none" />
      <circle fill="currentColor" stroke="none" cx="20" cy="50" r="10">
        <animate
          attributeName="opacity"
          dur="1s"
          values="0;1;0"
          repeatCount="indefinite"
          begin="0.1"
        />
      </circle>
      <circle fill="currentColor" stroke="none" cx="50" cy="50" r="10">
        <animate
          attributeName="opacity"
          dur="1s"
          values="0;1;0"
          repeatCount="indefinite"
          begin="0.2"
        />
      </circle>
      <circle fill="currentColor" stroke="none" cx="80" cy="50" r="10">
        <animate
          attributeName="opacity"
          dur="1s"
          values="0;1;0"
          repeatCount="indefinite"
          begin="0.3"
        />
      </circle>
    </svg>
  );
}