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Adds preview links of tracked files in GitHub pull requests to the Astro and Starlight documentation.
// ==UserScript==
// @name Astro Docs Preview Links
// @version 0.1.3
// @namespace https://hideoo.dev/
// @description Adds preview links of tracked files in GitHub pull requests to the Astro and Starlight documentation.
// @tag productivity
// @license MIT
// @author HiDeoo (https://github.com/hideoo)
// @homepageURL https://github.com/HiDeoo/userscript-astro-docs-preview-links
// @supportURL https://github.com/HiDeoo/userscript-astro-docs-preview-links/issues
// @iconURL https://raw.githubusercontent.com/primer/octicons/refs/heads/main/icons/link-24.svg
//
// @match https://github.com/*
// @run-at document-end
// ==/UserScript==
;(function () {
'use strict'
const docsPullRequestRegex = /^https:\/\/github\.com\/withastro\/(?:docs|starlight)\/pull\/\d+\/?$/
const validExtensionsRegex = /\.mdx?$/
/**
* @param {Element[]} comments
* @param {string} author
* @returns {Element[]}
*/
function getCommentsFromAuthor(comments, author) {
return comments.filter((comment) =>
isElementTextEqual(comment.querySelector('.timeline-comment-header .author'), author),
)
}
/**
* @param {Element | null} element
* @param {string} text
* @returns {boolean}
*/
function isElementTextEqual(element, text) {
return element instanceof HTMLElement && element.innerText === text
}
/**
* @param {string} path
* @returns {string}
*/
function stripExtension(path) {
const periodIndex = path.lastIndexOf('.')
return path.slice(0, periodIndex > -1 ? periodIndex : undefined)
}
/**
* @param {string} locale
* @returns {boolean}
*/
function isRootLocale(locale) {
return location.href.startsWith('https://github.com/withastro/starlight/pull/') && locale === 'en'
}
/**
* @param {string} url
* @returns {boolean}
*/
function isDocsPullRequestPage(url) {
return docsPullRequestRegex.test(url.split(/[#?]/)[0] ?? url)
}
/**
* @returns {boolean}
*/
function addLinks() {
const comments = [...document.querySelectorAll('.pull-discussion-timeline .timeline-comment')]
const deployComment = getCommentsFromAuthor(comments, 'netlify').find((comment) => {
const title = comment.querySelector('.comment-body > h3:first-child')
return title instanceof HTMLElement && title.innerText.includes('Deploy Preview for')
})
if (!deployComment) return false
const deployPreviewRow = [...deployComment.querySelectorAll('.comment-body td')].find((cell) =>
isElementTextEqual(cell, '😎 Deploy Preview'),
)?.parentElement
if (!deployPreviewRow) return false
const deployPreviewUrl = deployPreviewRow.querySelector('a')?.href
if (!deployPreviewUrl) return false
const lunariaComment = getCommentsFromAuthor(comments, 'astrobot-houston').find((comment) =>
isElementTextEqual(comment.querySelector('.comment-body > h2:first-child'), 'Lunaria Status Overview'),
)
if (!lunariaComment) return false
const trackedFileTable = lunariaComment.querySelector('.comment-body > h3 ~ markdown-accessiblity-table')
if (!trackedFileTable) return true
const trackedFilesRows = [...trackedFileTable.querySelectorAll('table > tbody > tr')]
/** @type {Set<string>} */
const trackedFiles = new Set()
for (const row of trackedFilesRows) {
const [locale, path] = [...row.querySelectorAll('td')].map((cell) => cell.innerText)
if (!locale || !path || !validExtensionsRegex.test(path)) continue
trackedFiles.add(`${isRootLocale(locale) ? '' : `${locale}/`}${stripExtension(path)}/`)
}
if (trackedFiles.size === 0) return true
const linksRow = document.createElement('tr')
const linksTitleCell = document.createElement('td')
linksTitleCell.setAttribute('align', 'center')
linksTitleCell.setAttribute('style', 'vertical-align: top;')
linksTitleCell.innerText = '⚡ Tracked links'
const linksContentCell = document.createElement('td')
linksContentCell.append(
...[...trackedFiles].flatMap((pathname, index) => {
if (pathname.endsWith('index/')) pathname = pathname.replace(/index\/$/, '')
const link = document.createElement('a')
link.href = deployPreviewUrl + pathname
link.innerText = `/${pathname}`
return index < trackedFiles.size - 1 ? [link, document.createElement('br')] : link
}),
)
linksRow.append(linksTitleCell, linksContentCell)
deployPreviewRow.after(linksRow)
return true
}
function handlePagination() {
const paginationButton = /** @type {HTMLButtonElement?} */ (
document.querySelector('.ajax-pagination-form button.ajax-pagination-btn')
)
if (!paginationButton) return
paginationButton.form?.addEventListener(
'click',
() => paginationButton.form?.addEventListener('page:loaded', run, { once: true }),
{ once: true },
)
}
function run() {
if (isDocsPullRequestPage(location.href)) {
const didAddLinks = addLinks()
if (!didAddLinks) handlePagination()
}
}
run()
document.addEventListener('turbo:render', run)
})()