qgustavor/gist:7309f3a628cc1c2688c0

## gistfile1.js
// Second ~~Flight~~ Round: a jQuery based web-spider
var taskQueue = ['https://tracker.uniotaku.com/torrents.php', 'https://tracker.uniotaku.com/forums.php'];
var fetchedPages = [];
var fetchedImages = {};
var unique = ((e, n, a) => n === a.indexOf(e));
var TARGET_IMAGE = 'http://i60.tinypic.com/oa6cqw.jpg';

checkQueue();

function processData(href, data){
  var $data = $(data);

  taskQueue = taskQueue.concat(
    $data.find('a')
    .get().map(e => e.href.replace(/#.*/, '').replace('&hit=1', '').replace('&page=1', '').replace('?page=1', '').replace(/[&?]page=$/, '').replace('http://', 'https://'))
    .filter(e => -1 === fetchedPages.indexOf(e) && -1 === e.indexOf('page=last') && e.includes('tracker.uniotaku.com') && !e.includes('report') && !e.includes('mailbox') && !e.includes('download.php') && !e.startsWith('javascript'))
  ).filter(unique);

  fetchedImages[href] = $data
    .find('img[src^="http"]:not([src^="https://tracker.uniotaku.com/"]):not([src*="gravatar.com"]):not([src*="analytics.kap"]):not(.post_avatar)')
    .get().map(e => e.src)
    .filter(unique);
  checkQueue();
}

function checkQueue() {
  if (taskQueue.length === 0) {
    console.log(Object.keys(fetchedImages).filter(e=>fetchedImages[e].includes(TARGET_IMAGE)));
    open('data:text/html,<!doctype html><style>*{margin:0}body{-webkit-columns:5;columns:5}img{width:100%;float:left}</style>'+Object.keys(fetchedImages).reduce((a,b)=>a.concat(fetchedImages[b]),[]).filter((a,b,c)=>b===c.indexOf(a)).map(e=>`<img src="${e}">`).join(''))
    return;
  }
  var nextPage = taskQueue.pop();

  $.ajax(nextPage).always(data => {
    console.log('Loading', nextPage);
    console.log(fetchedPages.length, 'pages loaded. Still', taskQueue.length, 'pages to load.');
    fetchedPages.push(nextPage);
    if (typeof data === 'string') {
      processData(nextPage, data);
    } else { // 404
      checkQueue();
    }
  });
}
	// Second ~~Flight~~ Round: a jQuery based web-spider
	var taskQueue = ['https://tracker.uniotaku.com/torrents.php', 'https://tracker.uniotaku.com/forums.php'];
	var fetchedPages = [];
	var fetchedImages = {};
	var unique = ((e, n, a) => n === a.indexOf(e));
	var TARGET_IMAGE = 'http://i60.tinypic.com/oa6cqw.jpg';

	checkQueue();

	function processData(href, data){
	var $data = $(data);

	taskQueue = taskQueue.concat(
	$data.find('a')
	.get().map(e => e.href.replace(/#.*/, '').replace('&hit=1', '').replace('&page=1', '').replace('?page=1', '').replace(/[&?]page=$/, '').replace('http://', 'https://'))
	.filter(e => -1 === fetchedPages.indexOf(e) && -1 === e.indexOf('page=last') && e.includes('tracker.uniotaku.com') && !e.includes('report') && !e.includes('mailbox') && !e.includes('download.php') && !e.startsWith('javascript'))
	).filter(unique);

	fetchedImages[href] = $data
	.find('img[src^="http"]:not([src^="https://tracker.uniotaku.com/"]):not([src="gravatar.com"]):not([src="analytics.kap"]):not(.post_avatar)')
	.get().map(e => e.src)
	.filter(unique);
	checkQueue();
	}

	function checkQueue() {
	if (taskQueue.length === 0) {
	console.log(Object.keys(fetchedImages).filter(e=>fetchedImages[e].includes(TARGET_IMAGE)));
	open('data:text/html,<!doctype html><style>*{margin:0}body{-webkit-columns:5;columns:5}img{width:100%;float:left}</style>'+Object.keys(fetchedImages).reduce((a,b)=>a.concat(fetchedImages[b]),[]).filter((a,b,c)=>b===c.indexOf(a)).map(e=>`<img src="${e}">`).join(''))
	return;
	}
	var nextPage = taskQueue.pop();

	$.ajax(nextPage).always(data => {
	console.log('Loading', nextPage);
	console.log(fetchedPages.length, 'pages loaded. Still', taskQueue.length, 'pages to load.');
	fetchedPages.push(nextPage);
	if (typeof data === 'string') {
	processData(nextPage, data);
	} else { // 404
	checkQueue();
	}
	});
	}