text: /**
   * Copyright 2022 Google LLC
   *
   * 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.
   */
  
  import React from 'react';
  import PropTypes from 'prop-types';
  import styled from 'styled-components';
  import { RelativeDatetime } from 'client/core';
  
  const StyledArticleHeader = styled.header`
    font-size: 0.75rem;
    color: ${({ theme }) => theme.gray700};
  `;
  
  const Author = styled.span`
    ::after {
      content: " • ";
    }
  `;
  
  /** The header of a self-contained, user-generated composition. */
  const ArticleHeader = ({ author, dateCreated }) => (
    <StyledArticleHeader>
      <Author itemProp="author">{author}</Author>
      <RelativeDatetime date={dateCreated} itemProp="dateCreated" />
    </StyledArticleHeader>
  );
  
  ArticleHeader.propTypes = {
    /** The username of the person who wrote the content. */
    author: PropTypes.string.isRequired,
    /** The date the content was posted. */
    dateCreated: PropTypes.string.isRequired,
  };
  
  export default ArticleHeader;
  