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'use strict'
const { $jsonld, description } = require('@metascraper/helpers')
/**
* Wrap a rule with validation and formatting logic.
*
* @param {Function} rule
* @return {Function} wrapped
*/
const createWrap = opts => rule => ({ htmlDom, url }) => {
const value = rule(htmlDom, url)
return description(value, opts)
}
/**
* Rules.
*/
module.exports = opts => {
const wrap = createWrap(opts)
return {
description: [
wrap($jsonld('description')),
wrap($ => $('meta[property="og:description"]').attr('content')),
wrap($ => $('meta[name="twitter:description"]').attr('content')),
wrap($ => $('meta[name="description"]').attr('content')),
wrap($ => $('meta[itemprop="description"]').attr('content')),
wrap($jsonld('articleBody'))
]
}
}
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