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'use strict'
const { $jsonld, $filter, image } = require('@metascraper/helpers')
/**
* Wrap a rule with validation and formatting logic.
*
* @param {Function} rule
* @return {Function} wrapped
*/
const wrap = rule => ({ htmlDom, url }) => {
const value = rule(htmlDom, url)
return image(value, { url })
}
const getSrc = el => el.attr('src')
/**
* Rules.
*/
module.exports = () => ({
image: [
wrap($ => $('meta[property="og:image:secure_url"]').attr('content')),
wrap($ => $('meta[property="og:image:url"]').attr('content')),
wrap($ => $('meta[property="og:image"]').attr('content')),
wrap($ => $('meta[name="twitter:image:src"]').attr('content')),
wrap($ => $('meta[name="twitter:image"]').attr('content')),
wrap($ => $('meta[itemprop="image"]').attr('content')),
wrap($jsonld('image.0.url')),
wrap($jsonld('image.url')),
wrap($jsonld('image.url')),
wrap($jsonld('image')),
wrap($ => $filter($, $('article img[src]'), getSrc)),
wrap($ => $filter($, $('#content img[src]'), getSrc)),
wrap($ => $('img[alt*="author" i]').attr('src')),
wrap($ => $('img[src]').attr('src'))
]
})
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