53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
import Parser from 'rss-parser'
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async function getRssFeed(url) {
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const parser = new Parser({ timeout: 5000 })
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const feedUrl = `${url}/feed`
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let feed
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try {
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feed = await parser.parseURL(feedUrl)
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} catch (err) {
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console.error(`cannot get ${feedUrl}: ${err.message}`)
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return
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}
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return feed
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}
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const globalCache = new Map()
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export async function getChangelogItems(prefix, feedUrl) {
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const cacheKey = prefix + feedUrl
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if (globalCache.get(cacheKey)) {
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return globalCache.get(cacheKey)
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}
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const feed = await getRssFeed(feedUrl)
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if (!feed || !feed.items) {
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console.log(feed)
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console.error('feed is not valid or has no items')
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return
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}
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// only show the first 3 posts
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const changelog = feed.items.slice(0, 3).map((item) => {
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// remove the prefix if it exists (Ex: 'GitHub Actions: '), where the colon and expected whitespace should be hardcoded.
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const title = prefix ? item.title.replace(new RegExp(`^${prefix}`), '') : item.title
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return {
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// capitalize the first letter of the title
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title: title.trim().charAt(0).toUpperCase() + title.slice(1),
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date: item.isoDate,
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href: item.link,
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}
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})
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// We don't cache the raw payload we'd get from the network request
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// because it would waste memory. Instead we store the "serialized"
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// object that's created from the raw payload.
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globalCache.set(cacheKey, changelog)
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return changelog
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}
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