58 lines
2.6 KiB
JavaScript
58 lines
2.6 KiB
JavaScript
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const socialUrls = require('@tryghost/social-urls');
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function getStructuredData(metaData) {
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let structuredData;
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let card = 'summary';
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if (metaData.twitterImage || metaData.coverImage.url) {
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card = 'summary_large_image';
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}
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structuredData = {
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'og:site_name': metaData.site.title,
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'og:type': metaData.ogType,
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'og:title': metaData.ogTitle,
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// CASE: metaData.excerpt for post context is populated by either the custom excerpt,
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// the meta description, or the automated excerpt of 50 words. It is empty for any
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// other context and *always* uses the provided meta description fields.
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'og:description': metaData.ogDescription,
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'og:url': metaData.canonicalUrl,
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'og:image': metaData.ogImage.url || metaData.coverImage.url,
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'article:published_time': metaData.publishedDate,
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'article:modified_time': metaData.modifiedDate,
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'article:tag': metaData.keywords,
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'article:publisher': metaData.site.facebook ? socialUrls.facebook(metaData.site.facebook) : undefined,
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'article:author': metaData.authorFacebook ? socialUrls.facebook(metaData.authorFacebook) : undefined,
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'twitter:card': card,
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'twitter:title': metaData.twitterTitle,
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'twitter:description': metaData.twitterDescription,
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'twitter:url': metaData.canonicalUrl,
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'twitter:image': metaData.twitterImage || metaData.coverImage.url,
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'twitter:label1': metaData.authorName ? 'Written by' : undefined,
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'twitter:data1': metaData.authorName,
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'twitter:label2': metaData.keywords ? 'Filed under' : undefined,
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'twitter:data2': metaData.keywords ? metaData.keywords.join(', ') : undefined,
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'twitter:site': metaData.site.twitter || undefined,
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'twitter:creator': metaData.creatorTwitter || undefined
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};
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if (metaData.ogImage.dimensions) {
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structuredData['og:image:width'] = metaData.ogImage.dimensions.width;
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structuredData['og:image:height'] = metaData.ogImage.dimensions.height;
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} else if (metaData.coverImage.dimensions) {
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structuredData['og:image:width'] = metaData.coverImage.dimensions.width;
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structuredData['og:image:height'] = metaData.coverImage.dimensions.height;
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}
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// return structured data removing null or undefined keys
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return Object.keys(structuredData).reduce(function (data, key) {
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const content = structuredData[key];
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if (content !== null && typeof content !== 'undefined') {
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data[key] = content;
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}
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return data;
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}, {});
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}
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module.exports = getStructuredData;
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