mirror of https://gitlab.com/curben/blog
95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
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'use strict'
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/* global hexo */
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/*
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* Modified from the hexo version,
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* https://github.com/hexojs/hexo/blob/master/lib/plugins/helper/open_graph.js
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* to include https://github.com/hexojs/hexo/pull/3674
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* and use WHATWG URL API
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* https://nodejs.org/api/url.html#url_the_whatwg_url_api
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*/
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const moment = require('moment')
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const { escapeHTML, htmlTag, prettyUrls, stripHTML } = require('hexo-util')
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const fullUrlFor = require('hexo-util').full_url_for
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function meta (name, content) {
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return `${htmlTag('meta', {
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name,
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content
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})}\n`
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}
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function og (name, content) {
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return `${htmlTag('meta', {
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property: name,
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content
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})}\n`
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}
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function openGraphHelper () {
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const { config, page } = this
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let description = page.excerpt || ''
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const author = config.author
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const keywords = page.tags || ''
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const title = page.title || config.title || ''
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const type = (this.is_post() ? 'article' : 'website')
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const url = prettyUrls(this.url, config.pretty_urls)
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const screenshot = '/screenshot/' + prettyUrls(this.path, config.pretty_urls)
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const siteName = config.title || ''
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const published = page.date || ''
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const updated = page.updated || ''
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const language = config.language.replace('-', '_')
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let result = ''
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if (description) {
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description = escapeHTML(stripHTML(description)
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.trim()
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.replace(/\n/g, ' ')
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.substring(0, 200))
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result += meta('description', description)
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}
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result += og('article:author', author)
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if (keywords) {
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keywords.forEach(tag => {
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result += og('article:tag', tag.name)
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})
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}
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result += og('og:type', type)
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result += og('og:title', title)
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result += og('og:url', url)
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if (siteName) {
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result += og('og:site_name', siteName)
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}
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if (description) {
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result += og('og:description', description)
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}
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result += og('og:locale', language)
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result += og('og:image', fullUrlFor.call(this, screenshot))
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if (published) {
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if ((moment.isMoment(published) || moment.isDate(published)) && !isNaN(published.valueOf())) {
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// Skip timezone conversion
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result += og('article:published_time', moment(published).format('YYYY-MM-DD[T00:00:00.000Z]'))
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}
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}
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if (updated) {
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if ((moment.isMoment(updated) || moment.isDate(updated)) && !isNaN(updated.valueOf())) {
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result += og('article:modified_time', moment(updated).format('YYYY-MM-DD[T00:00:00.000Z]'))
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}
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}
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return result.trim()
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}
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hexo.extend.helper.register('openGraph', openGraphHelper)
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