affiche une preview sur la page de recherche pour les liens
// ==UserScript==
// @name Pornolab Preview Light
// @version 3.4.0
// @description affiche une preview sur la page de recherche pour les liens
// @author seb-du17
// @license MIT
// @match *://pornolab.net/forum/tracker*
// @match *://pornolab.net/forum/viewforum*
// @match *://pornolab.net/forum/search*
// @run-at document-idle
// @grant none
// @namespace https://greasyfork.org/users/108513
// ==/UserScript==
/* jshint esversion: 11 */
/* global AbortController, IntersectionObserver, DOMParser, Image */
(function() {
'use strict';
// ========== Configuration ==========
const CONFIG = {
MAX_CONCURRENT: 2,
TIMEOUT: 10000,
RETRY_DELAY: 3000,
CACHE_SIZE: 200,
DEBOUNCE: 100,
IMG_WIDTH: 180,
IMG_HEIGHT: 210,
ROOT_MARGIN: '400px'
};
// ========== Cache LRU ==========
function createLRUCache(maxSize) {
const cache = new Map();
return {
get: function(key) {
if (!cache.has(key)) { return null; }
const value = cache.get(key);
cache.delete(key);
cache.set(key, value);
return value;
},
set: function(key, value) {
if (cache.has(key)) {
cache.delete(key);
} else if (cache.size >= maxSize) {
const firstKey = cache.keys().next().value;
cache.delete(firstKey);
}
cache.set(key, value);
},
has: function(key) {
return cache.has(key);
}
};
}
const cache = createLRUCache(CONFIG.CACHE_SIZE);
const failedUrls = new Set(); // urls ayant échoué une première fois
const requestQueue = [];
let activeRequests = 0;
// ========== CSS optimisé ==========
const style = document.createElement('style');
style.textContent = `
.pornolab-preview-wrapper {
display: flex !important;
align-items: flex-end !important;
gap: 10px !important;
width: 100% !important;
}
.pornolab-preview-wrapper-link {
flex: 1 1 auto !important;
min-width: 0 !important;
}
.pornolab-preview-img-container {
width: ${CONFIG.IMG_WIDTH}px !important;
height: ${CONFIG.IMG_HEIGHT}px !important;
flex-shrink: 0 !important;
overflow: hidden !important;
border: 1px solid #444 !important;
border-radius: 2px !important;
content-visibility: auto !important;
}
.pornolab-preview-img-container img {
width: 100% !important;
height: 100% !important;
object-fit: cover !important;
display: block !important;
}
`;
document.head.appendChild(style);
// ========== Fetch avec timeout ==========
function fetchWithTimeout(url, timeout) {
const controller = new AbortController();
const timeoutId = setTimeout(function() {
controller.abort();
}, timeout);
return fetch(url, {
signal: controller.signal,
priority: 'low'
}).then(function(response) {
clearTimeout(timeoutId);
return response;
}).catch(function(error) {
clearTimeout(timeoutId);
throw error;
});
}
// ========== Extraction URL preview ==========
function extractPreviewUrl(doc) {
const firstImg = doc.querySelector('.postImg');
if (!firstImg) { return ''; }
return (firstImg.title || firstImg.getAttribute('data-src') || firstImg.getAttribute('src') || '');
}
// ========== Queue de requêtes ==========
function processQueueItem(item) {
const resolve = item.resolve;
const url = item.url;
fetchWithTimeout(url, CONFIG.TIMEOUT)
.then(function(response) {
if (!response.ok) { return ''; }
return response.text();
})
.then(function(html) {
if (!html) { return []; }
const doc = new DOMParser().parseFromString(html, 'text/html');
const u = extractPreviewUrl(doc);
const urls = u ? [u] : [];
cache.set(url, urls);
return urls;
})
.then(resolve)
.catch(function() {
// Échec : marquer pour retry, ne pas mettre en cache
failedUrls.add(url);
resolve([]);
})
.finally(function() {
activeRequests--;
if (requestQueue.length) {
processQueue();
}
});
}
function processQueue() {
while (requestQueue.length && activeRequests < CONFIG.MAX_CONCURRENT) {
const item = requestQueue.shift();
activeRequests++;
processQueueItem(item);
}
}
function fetchPreviewUrls(url) {
const cached = cache.get(url);
if (cached !== null) {
return Promise.resolve(cached);
}
return new Promise(function(resolve) {
requestQueue.push({ resolve: resolve, url: url });
processQueue();
});
}
// ========== Retry silencieux ==========
function scheduleRetry(url, link) {
setTimeout(function() {
// Ne retenter que si toujours pas en cache
if (cache.has(url)) { return; }
failedUrls.delete(url);
fetchPreviewUrls(url).then(function(urls) {
if (!urls.length) { return; }
// Le lien est peut-être déjà remplacé par un wrapper, vérifier
if (link.parentNode) {
const wrapper = createPreviewWrapper(urls, link);
link.parentNode.replaceChild(wrapper, link);
}
});
}, CONFIG.RETRY_DELAY);
}
// ========== Insert preview ==========
function createPreviewWrapper(urls, link) {
const wrapper = document.createElement('div');
wrapper.className = 'pornolab-preview-wrapper';
const linkWrapper = document.createElement('div');
linkWrapper.className = 'pornolab-preview-wrapper-link';
linkWrapper.appendChild(link.cloneNode(true));
const imgContainer = document.createElement('div');
imgContainer.className = 'pornolab-preview-img-container';
const img = new Image();
img.src = urls[0];
img.loading = 'lazy';
img.decoding = 'async';
img.onerror = function() {
imgContainer.remove();
};
imgContainer.appendChild(img);
wrapper.appendChild(linkWrapper);
wrapper.appendChild(imgContainer);
return wrapper;
}
function insertPreview(link) {
if (link.dataset.previewDone) { return; }
const href = link.getAttribute('href');
if (!href || href.charAt(0) !== '.') { return; }
link.dataset.previewDone = '1';
const url = 'https://pornolab.net/forum' + href.slice(1);
fetchPreviewUrls(url).then(function(urls) {
if (!urls.length) {
// Fetch raté : programmer un retry silencieux
if (failedUrls.has(url)) {
scheduleRetry(url, link);
}
return;
}
const wrapper = createPreviewWrapper(urls, link);
if (link.parentNode) {
link.parentNode.replaceChild(wrapper, link);
}
});
}
// ========== Process links avec IntersectionObserver ==========
const pendingLinks = new Set();
let debounceTimer;
let intersectionObserver;
function handleIntersection(entry) {
if (entry.isIntersecting) {
insertPreview(entry.target);
intersectionObserver.unobserve(entry.target);
pendingLinks.delete(entry.target);
}
}
intersectionObserver = new IntersectionObserver(
function(entries) {
for (let i = 0; i < entries.length; i++) {
handleIntersection(entries[i]);
}
},
{ rootMargin: CONFIG.ROOT_MARGIN }
);
function processLinks() {
const selector = '.tLink:not([data-preview-done]), .tt-text:not([data-preview-done])';
const links = document.querySelectorAll(selector);
for (let i = 0; i < links.length; i++) {
const link = links[i];
if (!pendingLinks.has(link)) {
pendingLinks.add(link);
intersectionObserver.observe(link);
}
}
}
function debouncedProcessLinks() {
clearTimeout(debounceTimer);
debounceTimer = setTimeout(processLinks, CONFIG.DEBOUNCE);
}
// ========== MutationObserver ==========
const mutationObserver = new MutationObserver(debouncedProcessLinks);
function init() {
processLinks();
mutationObserver.observe(document.body, {
childList: true,
subtree: true
});
}
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
})();