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March 14, 2019 08:11
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| import React from 'react'; | |
| import Helmet from 'react-helmet'; | |
| import PropTypes from 'prop-types'; | |
| import { useStaticQuery, graphql } from 'gatsby'; | |
| import Facebook from './Facebook'; | |
| import Twitter from './Twitter'; | |
| // Complete tutorial: https://www.gatsbyjs.org/docs/add-seo-component/ | |
| const SEO = ({ title, description, banner, pathname, article, lang, robots, node }) => { | |
| const { site } = useStaticQuery(query); | |
| const { | |
| buildTime, | |
| siteMetadata: { | |
| siteUrl, | |
| defaultTitle, | |
| defaultDescription, | |
| defaultBanner, | |
| headline, | |
| siteLanguage, | |
| ogLanguage, | |
| author, | |
| twitter, | |
| facebook, | |
| logo | |
| }, | |
| } = site; | |
| const seo = { | |
| title: title || defaultTitle, | |
| description: description || defaultDescription, | |
| image: `${ banner || defaultBanner }`, | |
| url: `${ siteUrl }${ pathname || '' }`, | |
| lang: lang || siteLanguage, | |
| robots: robots || null | |
| }; | |
| // schema.org in JSONLD format | |
| // https://developers.google.com/search/docs/guides/intro-structured-data | |
| // You can fill out the 'author', 'creator' with more data or another type (e.g. 'Organization') | |
| const schemaOrgWebPage = { | |
| '@context': 'http://schema.org', | |
| '@type': 'WebPage', | |
| url: siteUrl, | |
| headline, | |
| inLanguage: siteLanguage, | |
| mainEntityOfPage: siteUrl, | |
| description: defaultDescription, | |
| name: defaultTitle, | |
| author: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| copyrightHolder: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| copyrightYear: '2019', | |
| creator: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| publisher: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| datePublished: '2019-01-18T10:30:00+01:00', | |
| dateModified: buildTime, | |
| image: { | |
| '@type': 'ImageObject', | |
| url: `${ siteUrl }${ defaultBanner }`, | |
| }, | |
| }; | |
| const schemaOrgOrganization = { | |
| '@context': 'http://schema.org', | |
| '@type': 'Organization', | |
| '@id': `${ siteUrl }#organization`, | |
| 'legalName': 'example Network Ltd', | |
| url: siteUrl, | |
| name: author, | |
| logo: logo, | |
| contactPoint: { | |
| '@type': 'ContactPoint', | |
| 'contactType': 'customer support', | |
| 'email': 'support@example.com' | |
| }, | |
| sameAs: [ | |
| 'https://www.facebook.com/example', | |
| 'https://plus.google.com/+example', | |
| 'https://www.youtube.com/channel/UCABc2e0MYiKdwwIlG_zHB0w', | |
| 'https://twitter.com/example', | |
| ] | |
| }; | |
| // Initial breadcrumb list | |
| const itemListElement = [ | |
| { | |
| '@type': 'ListItem', | |
| item: { | |
| '@id': siteUrl, | |
| name: 'Homepage', | |
| }, | |
| position: 1, | |
| }, | |
| ]; | |
| let schemaArticle = null; | |
| if (article) { | |
| schemaArticle = { | |
| '@context': 'http://schema.org', | |
| '@type': 'Article', | |
| author: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| copyrightHolder: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| copyrightYear: '2019', | |
| creator: { | |
| '@type': 'Organization', | |
| name: author, | |
| }, | |
| publisher: { | |
| '@type': 'Organization', | |
| name: author, | |
| logo: { | |
| '@type': 'ImageObject', | |
| url: `${ siteUrl }${ defaultBanner }`, | |
| }, | |
| }, | |
| datePublished: node.first_publication_date, | |
| dateModified: node.last_publication_date, | |
| description: seo.description, | |
| headline: seo.title, | |
| inLanguage: seo.lang, | |
| url: seo.url, | |
| name: seo.title, | |
| image: { | |
| '@type': 'ImageObject', | |
| url: seo.image, | |
| }, | |
| mainEntityOfPage: seo.url, | |
| }; | |
| // Push current blogpost into breadcrumb list | |
| itemListElement.push({ | |
| '@type': 'ListItem', | |
| item: { | |
| '@id': seo.url, | |
| name: seo.title, | |
| }, | |
| position: 2, | |
| }); | |
| } | |
| const breadcrumb = { | |
| '@context': 'http://schema.org', | |
| '@type': 'BreadcrumbList', | |
| description: 'Breadcrumbs list', | |
| name: 'Breadcrumbs', | |
| itemListElement, | |
| }; | |
| return ( | |
| <> | |
| <Helmet title={seo.title}> | |
| <html lang={seo.lang} /> | |
| <meta name="description" content={seo.description} /> | |
| <meta name="image" content={seo.image} /> | |
| <meta name="example" content="example" /> | |
| <meta name="apple-itunes-app" content="app-id=123" /> | |
| {seo.robots && <meta name="robots" content={seo.robots} />} | |
| {/* Insert schema.org data conditionally (webpage/article) + everytime (breadcrumbs) */} | |
| {!article && <script type="application/ld+json">{JSON.stringify(schemaOrgWebPage)}</script>} | |
| {article && <script type="application/ld+json">{JSON.stringify(schemaArticle)}</script>} | |
| <script type="application/ld+json">{JSON.stringify(schemaOrgOrganization)}</script> | |
| <script type="application/ld+json">{JSON.stringify(breadcrumb)}</script> | |
| </Helmet> | |
| desc={seo.description} | |
| image={seo.image} | |
| title={seo.title} | |
| type={article ? 'article' : 'website'} | |
| url={seo.url} | |
| locale={ogLanguage} | |
| name={facebook} | |
| /> | |
| <Twitter title={seo.title} image={seo.image} desc={seo.description} username={twitter} /> | |
| </> | |
| ); | |
| }; | |
| export default SEO; | |
| SEO.propTypes = { | |
| title: PropTypes.string, | |
| description: PropTypes.string, | |
| banner: PropTypes.string, | |
| pathname: PropTypes.string, | |
| article: PropTypes.bool, | |
| node: PropTypes.object, | |
| lang: PropTypes.string, | |
| robots: PropTypes.string | |
| }; | |
| SEO.defaultProps = { | |
| title: null, | |
| description: null, | |
| banner: null, | |
| pathname: null, | |
| article: false, | |
| lang: null, | |
| node: null, | |
| robots: null | |
| }; | |
| const query = graphql` | |
| query SEO { | |
| site { | |
| buildTime(formatString: "YYYY-MM-DD") | |
| siteMetadata { | |
| siteUrl | |
| defaultTitle: title | |
| defaultDescription: description | |
| defaultBanner: banner | |
| headline | |
| siteLanguage | |
| ogLanguage | |
| author | |
| } | |
| } | |
| } | |
| ` | |
| ; |
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