forked from wgroeneveld/go-jamming
90 lines
3.6 KiB
JavaScript
90 lines
3.6 KiB
JavaScript
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const parser = require("fast-xml-parser")
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const config = require('./../config')
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const dayjs = require('dayjs')
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const customParseFormat = require('dayjs/plugin/customParseFormat')
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dayjs.extend(customParseFormat)
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const parseOpts = {
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ignoreAttributes: false
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}
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function collectHrefsFromDescription(description) {
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// first thought: use parser.parse() and traverse recursively. turned out to be way too slow.
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const linksMatch = description.match(/href="([^"]*")/g)
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if(!linksMatch) return []
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const links = linksMatch
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.map(match => match.replace("href=", "").replace(/\"/g, ""))
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.filter(match => !(/\.(gif|zip|rar|bz2|gz|7z|jpe?g|tiff?|png|webp|bmp)$/i).test(match))
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.filter(match => !config.disallowedWebmentionDomains.some(domain => match.indexOf(domain) >= 0))
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return [...new Set(links)]
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}
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/**
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* a typical RSS item looks like this:
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-- if <time/> found in body, assume it's a lastmod update timestamp!
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{
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title: '@celia @kev I have read both you and Kev's post on...',
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link: 'https://brainbaking.com/notes/2021/03/16h17m07s14/',
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comments: 'https://brainbaking.com/notes/2021/03/16h17m07s14/#commento',
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pubDate: 'Tue, 16 Mar 2021 17:07:14 +0000',
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author: 'Wouter Groeneveld',
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guid: {
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'#text': 'https://brainbaking.com/notes/2021/03/16h17m07s14/',
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'@_isPermaLink': 'true'
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},
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description: ' \n' +
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' \n' +
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'\n' +
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' <p><span class="h-card"><a class="u-url mention" data-user="A5GVjIHI6MH82H6iLQ" href="https://fosstodon.org/@celia" rel="ugc">@<span>celia</span></a></span> <span class="h-card"><a class="u-url mention" data-user="A54b8g0RBaIgjzczMu" href="https://fosstodon.org/@kev" rel="ugc">@<span>kev</span></a></span> I have read both you and Kev’s post on this and agree on some points indeed! But I’m not yet ready to give up webmentions. As an academic, the idea of citing/mentioning each other is very alluring 🤓. Plus, I needed an excuse to fiddle some more with JS… <br><br>As much as I loved using Wordpress before, I can’t imagine going back to writing stuff in there instead of in markdown. Gotta keep the workflow short, though. Hope it helps you focus on what matters - content!</p>\n' +
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'\n' +
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'\n' +
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' <p>\n' +
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' By <a href="/about">Wouter Groeneveld</a> on <time datetime='2021-03-20'>20 March 2021</time>.\n' +
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' </p>\n' +
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' '
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}
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**/
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function collect(xml, since = '') {
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const root = parser.parse(xml, parseOpts).rss.channel
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const sinceDate = dayjs(since)
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const enrichWithDateProperties = (item) => {
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// example pubDate format: Tue, 16 Mar 2021 17:07:14 +0000
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const rawpub = item.pubDate?.split(", ")?.[1]
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item.pubDate = rawpub ? dayjs(rawpub, "DD MMM YYYY HH:mm:ss ZZ") : dayjs()
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if(!item.pubDate.isValid()) item.pubDate = dayjs()
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const dateTimeMatch = item.description.match(/datetime="([^"]*")/g)
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// Selecting the first - could be dangerous. Living on the edge. Don't care. etc.
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const rawlastmod = dateTimeMatch?.[0]?.replace("datetime=", "")?.replace(/\"/g, "")
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item.lastmodDate = rawlastmod ? dayjs(rawlastmod) : dayjs(0)
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return item
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}
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const sincePublicationDate = (item) => {
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if(!sinceDate.isValid()) return true
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return sinceDate < (item.lastmodDate > item.pubDate ? item.lastmodDate : item.pubDate)
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}
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const entries = root.item.filter ? root.item : [root.item]
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return entries
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.map(enrichWithDateProperties)
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.filter(sincePublicationDate)
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.map(item => {
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return {
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link: item.link,
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hrefs: collectHrefsFromDescription(item.description)
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}
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})
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}
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module.exports = {
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collect
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}
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