// ==UserScript==
// @name         OptiFine Download Links
// @namespace    zomo.dev
// @match        https://optifine.net/*
// @version      1.0
// @description  automatically grab optifine links through the ads
// @downloadURL  https://git.zomo.dev/zomo/browser-scripts/raw/branch/main/dist/optifine-download-links.user.js
// @supportURL   https://git.zomo.dev/zomo/browser-scripts/issues
// @homepageURL  https://git.zomo.dev/zomo/browser-scripts
// ==/UserScript==
var onhover = false
async function getDownload(href) {
    let resp = await fetch(href)
    let text = await resp.text()
    let match = text.match(/<a href=['"](downloadx.*?)['"]/i)
    if (match) {
        return match[1]
    }
    return null
}
function attachFetchDownloadLink(a, depth = 0) {
    function run() {
        a.innerText = 'Loading'
        let url = new URL(a.href)
        if (url.pathname === '/adloadx') {
            getDownload(a.href).then(downloadUrl => {
                if (downloadUrl) {
                    a.href = downloadUrl
                    a.innerText = 'Download'
                } else {
                    a.innerText = 'Failed'
                    if (onhover) attachFetchDownloadLink(a, ++depth)
                    else
                        setTimeout(
                            () => attachFetchDownloadLink(a, ++depth),
                            1e3
                        )
                }
            })
        }
    }
    if (depth > 5) return
    if (onhover) {
        a.addEventListener('mouseover', run, { once: true })
    } else {
        run()
    }
}
addEventListener('load', () => {
    document.querySelectorAll('a').forEach(a => {
        let href = new URL(a.href)
        if (href.hostname === 'adfoc.us') {
            let params = href.searchParams
            if (params.has('url')) {
                let url = params.get('url')?.replace('http://', 'https://')
                if (url) {
                    a.href = url
                    attachFetchDownloadLink(a)
                }
            }
        }
    })
})