| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 { Helmet } from 'react-helmet'; |
| import { useStaticQuery, graphql } from 'gatsby'; |
| import favicon from '../images/favicon.png'; |
| |
| function SEO({ |
| description, lang, meta, title, |
| }) { |
| const { site } = useStaticQuery( |
| graphql` |
| query { |
| site { |
| siteMetadata { |
| title |
| description |
| author |
| } |
| } |
| } |
| `, |
| ); |
| |
| const metaDescription = description || site.siteMetadata.description; |
| |
| return ( |
| <Helmet |
| htmlAttributes={{ |
| lang, |
| }} |
| title={title} |
| titleTemplate={`%s | ${site.siteMetadata.title}`} |
| meta={[ |
| { |
| name: 'description', |
| content: metaDescription, |
| }, |
| { |
| property: 'og:title', |
| content: title, |
| }, |
| { |
| property: 'og:description', |
| content: metaDescription, |
| }, |
| { |
| property: 'og:type', |
| content: 'website', |
| }, |
| { |
| name: 'twitter:card', |
| content: 'summary', |
| }, |
| { |
| name: 'twitter:creator', |
| content: site.siteMetadata.author, |
| }, |
| { |
| name: 'twitter:title', |
| content: title, |
| }, |
| { |
| name: 'twitter:description', |
| content: metaDescription, |
| }, |
| ].concat(meta)} |
| > |
| <link rel="icon" href={favicon} /> |
| </Helmet> |
| ); |
| } |
| |
| SEO.defaultProps = { |
| lang: 'en', |
| meta: [], |
| description: '', |
| }; |
| |
| SEO.propTypes = { |
| description: PropTypes.string, |
| lang: PropTypes.string, |
| meta: PropTypes.arrayOf(PropTypes.object), |
| title: PropTypes.string.isRequired, |
| }; |
| |
| export default SEO; |