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View thumbnails of posts before/without clicking on them. Adds a post image preview to the torrent tables. No more wasting time checking each post page. Know what you want before you click.
// ==UserScript==
// @name Pornolab Thumbnail Preview
// @namespace hetisnietgay
// @version 0.3.4
// @description View thumbnails of posts before/without clicking on them. Adds a post image preview to the torrent tables. No more wasting time checking each post page. Know what you want before you click.
// @author hetisnietgay
// @match *pornolab.net/forum/*
// @match *rutracker.org/forum/*
// @grant GM_xmlhttpRequest
// @connect pornolab.net
// @license MIT
// ==/UserScript==
// Load the image before trying to obtain the dimensions
async function loadImage(url) {
let img = new Image();
img.src = url.replace(/\s/g, '');
await img.decode();
return img;
};
// Map image url array to preloaded images array
async function fetchImages(urls) {
if (!urls)
return;
// Images load asynchronously so have to await all of the urls in the array
let unresolved = urls.map(loadImage);
let results = await Promise.allSettled(unresolved);
let errors = results.filter(result => result.status === 'rejected')
.map(result => result.value);
if (errors.length)
console.error(errors);
results = results.filter(result => result.status === 'fulfilled')
.map(result => result.value);
if (!results.length)
return;
//console.log(results);
return results;
}
function xmlGet(url) {
return new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: "GET",
url: url,
onload: (res) => {
resolve(res.responseText);
},
onerror: (err) => {
reject(err);
}
});
});
}
// Image URL for if thumbnail failed
const errorURL = "https://cdn.pixabay.com/photo/2017/02/12/21/29/false-2061131_960_720.png";
// Async delay
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
(async () => {
'use strict';
let table = document.querySelectorAll(".forumline.forum, .forumline.tablesorter")[0];
let forumNameHeader, topicNameHeader;
// Second child because fix for odd table
let tableHead = table.querySelector("tr:first-child > th:nth-child(2)");
let screenshotHead = Object.assign(document.createElement('th'), {
className: `{sorter: false}`,
innerHTML: `<b class="tbs-text">Screenshot</b>`,
});
let torrents = Array.from(table.querySelectorAll("tbody > tr"));
let linkSelect = ".tLink";
let tdSelect = "td:nth-child(2)";
// Resize table columns and other page specific things, pretty messy rn
if (table.id === "t-seed") {
forumNameHeader = table.querySelector("th[data-resizable-column-id='forum_name']");
topicNameHeader = table.querySelector("th[data-resizable-column-id='topic_name']");
forumNameHeader.style = "width: 0.01%;";
topicNameHeader.style = "width: 30%;";
screenshotHead.setAttribute('data-resizable-column-id', 'preview_col');
screenshotHead.style = "width: 30%;";
} else if (table.id === "tor-tbl") {
forumNameHeader = table.querySelector("th[width='25%']");
topicNameHeader = table.querySelector("th[width='75%']");
forumNameHeader.setAttribute("width", "0.01%");
topicNameHeader.setAttribute("width", "30%");
screenshotHead.setAttribute("width", "40%");
} else if (table.id === "srch-tbl") {
linkSelect = "a.topictitle";
forumNameHeader = table.querySelector("col[width='25%']");
topicNameHeader = table.querySelector("col[width='75%']");
let screenshotCol = forumNameHeader.cloneNode();
table.querySelector("colgroup > col:first-child").after(screenshotCol);
forumNameHeader.setAttribute("width", "0.01%");
topicNameHeader.setAttribute("width", "30%");
screenshotCol.setAttribute("width", "40%")
} else {
linkSelect = "a.torTopic";
let tdSelect = "td:first-child";
topicNameHeader = table.querySelector("col[width='75%']");
let screenshotCol = topicNameHeader.previousElementSibling;
topicNameHeader.setAttribute("width", "30%");
screenshotCol.setAttribute("width", "40%");
// First few aren't torrent posts
let torSelector = "td.topic_id > img.topic_icon:not([src='//static.pornolab.net/templates/default/images/folder_announce.gif'], [src='//static.pornolab.net/templates/default/images/folder_announce_new.gif'])";
let firstTorrent = table.querySelector(torSelector).parentNode.parentNode;
let index = Array.prototype.indexOf.call(firstTorrent.parentNode.children, firstTorrent);
torrents = torrents.slice(index);
// Fixes for odd table
tableHead = table.querySelector("tr:first-child > th:first-child");
let emptyHead = document.createElement("th");
tableHead.before(emptyHead);
table.querySelectorAll("th[colspan], .topic_id[colspan]").forEach(iconCell => iconCell.removeAttribute("colspan"));
screenshotHead = Object.assign(document.createElement("th"), {
innerHTML: "Screenshot",
});
}
tableHead.before(screenshotHead);
for (const torrent of torrents) {
// Post link
let link = torrent.querySelector(linkSelect);
if (!link)
continue;
// Fetch post page
let res = await xmlGet(link.href);
let div = document.createElement("div");
div.innerHTML = res;
// Table cell for image(s)
let imgCell = document.createElement("td");
// Get first 2 post image URLs
let postImgs = Array.from(div.querySelectorAll("var.postImg"))
.slice(0, 2)
.map((postImg) => postImg.title);
// Fetch loaded images with URLS
let posters = await fetchImages(postImgs);
//let posters = postImgs.filter((img) => (img.naturalHeight > 350 || img.naturalWidth > 350) && (img.naturalWidth / img.naturalHeight < 4)); // extra check for banners
if (!posters) {
let img = await loadImage(errorURL);
img.style = "height: 50px;"
imgCell.append(img);
} else {
// If using imgbox, we can't tell whether it's a big or thumbnail image from url,
// though the requirements for thumbnails are they have to be under 350px on each side.
// Given that most 'poster' images are well over this, it *seems* pretty reliable (for now).
posters = posters.filter((img) => (img.naturalHeight > 350 || img.naturalWidth > 350) && (img.naturalWidth / img.naturalHeight < 4));
let width;
if (posters && posters.length === 2) {
width = [];
let totalWidth = posters[0].naturalWidth + posters[1].naturalWidth;
width[0] = (100 * (posters[0].naturalWidth / totalWidth));
width[1] = (100 * (posters[1].naturalWidth / totalWidth));
}
posters.forEach((img, i) => {
if (posters.length === 2) {
img.style = "width: 100%; border: 5px;";
img.style = "width: " + width[i] + "%; border: 5px;";
} else {
img.style = "width: 100%; border: 5px;";
}
// Add to container
imgCell.append(img);
});
}
// Add to table
torrent.querySelector(tdSelect).before(imgCell);
// Slow load images so we don't get IP blocked
await sleep(400);
}
})();