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path: root/index.ts
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import puppeteer from 'puppeteer';
import cheerio from 'cheerio';

import * as types from './types';

var browser = await puppeteer.launch();

async function getPageHTML(url: string) {
	var page = await browser.newPage();
	await page.goto(url, { waitUntil: 'domcontentloaded' });
	var content = await page.content();
	await page.close();
	return content
}

var html = await getPageHTML('https://optifine.net/downloads');

var $ = cheerio.load(html);

var versions: types.OptifineVersion[] = [];
var downloads = $('td.content span.downloads .downloadLine');
var downloadCount = downloads.length;
downloads.each(async (i, el) => {
	var downloadLinkPre = $(el).find('.colMirror a').attr('href').replace("http", "https");
	var downloadPageHTML = await getPageHTML(downloadLinkPre);
	var d$ = cheerio.load(downloadPageHTML);
	var link = "https://optifine.net/" + d$("#Download .downloadButton a").attr("href");
	var version: types.OptifineVersion = {
		name: $(el).find(".colFile").text(),
		minecraft: downloadLinkPre.match(/1\.\d{1,2}(\.\d{1,2})?/)[0],
		forge: $(el).find('.colForge').text().toLowerCase().replace('forge', '').trim(),
		date: $(el).find('.colDate').text(),
		preview: downloadLinkPre.toLowerCase().includes('preview'),
		download: {
			link,
			token: link.match(/(?<=x=).+/)[0],
			filename: downloadLinkPre.match(/OptiFine.+?\.jar/).toString()
		}
	}
	versions.push(version);
	if( i == downloadCount - 1 ) {
		var minecraftVersions = {};
		var latest: types.OptifineVersion;
		var latestPre: types.OptifineVersion;
		for(var version of versions) {
			if (typeof minecraftVersions[version.minecraft] === "undefined")
				minecraftVersions[version.minecraft] = [];
			minecraftVersions[version.minecraft].push(version);

			if (!latest && version.preview == false)
				latest = version;
			if (!latestPre && version.preview == true)
				latestPre = version;
		}

		var response: types.APIResponse = {
			lastUpdate: Date.now(),
			all: versions,
			versions: minecraftVersions,
			latest,
			latestPre
		}

		console.log(JSON.stringify(response));
		process.exit(0);
	}
});