// ==UserScript==
// @name 8chan YouTube Link Enhancer
// @namespace nipah-scripts-8chan
// @version 3.3.1
// @description Cleans up YouTube links, adds titles, optional thumbnail previews, and settings via STM.
// @author nipah, Gemini
// @license MIT
// @match https://8chan.moe/*
// @match https://8chan.se/*
// @grant GM.xmlHttpRequest
// @grant GM.setValue
// @grant GM.getValue
// @grant GM_addStyle
// @connect youtube.com
// @connect i.ytimg.com
// @run-at document-idle
// ==/UserScript==
(async function() {
'use strict';
// --- Constants ---
const SCRIPT_NAME = 'YTLE';
const SCRIPT_ID = 'YTLE'; // Unique ID for Settings Tab Manager
const CACHE_KEY_SETTINGS = 'ytleSettings';
const CACHE_KEY_TITLES = 'ytleTitleCache';
const DEFAULTS = Object.freeze({
CACHE_EXPIRY_DAYS: 7,
SHOW_THUMBNAILS: false,
API_DELAY_MS: 200,
CACHE_CLEANUP_PROBABILITY: 0.1, // 10% chance per run
THUMBNAIL_POPUP_ID: 'ytle-thumbnail-popup',
THUMBNAIL_HIDE_DELAY_MS: 150,
});
const REGEX = Object.freeze({
YOUTUBE: /(?:https?:\/\/)?(?:www\.)?(?:youtube\.com\/(?:watch\?v=|embed\/|v\/|shorts\/|live\/)|youtu\.be\/)([a-zA-Z0-9_-]{11})(?:[?&#]|$)/i, // Simplified slightly, captures ID
YOUTUBE_TRACKING_PARAMS: /[?&](si|feature|ref|fsi|source|utm_source|utm_medium|utm_campaign|gclid|gclsrc|fbclid)=[^&]+/gi,
});
const URL_TEMPLATES = Object.freeze({
OEMBED: "https://www.youtube.com/oembed?url=https://www.youtube.com/watch?v=VIDEO_ID&format=json",
THUMBNAIL_WEBP: "https://i.ytimg.com/vi_webp/VIDEO_ID/maxresdefault.webp",
// Fallback might be needed if maxresdefault webp fails often, e.g., mqdefault.jpg
// THUMBNAIL_JPG_HQ: "https://i.ytimg.com/vi/VIDEO_ID/hqdefault.jpg",
});
const PLACEHOLDER_IMG_SRC = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'; // Transparent pixel
const YOUTUBE_ICON_SVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path fill="#FF0000" d="M549.7 124.1c-6.3-23.7-24.9-42.4-48.6-48.6C456.5 64 288 64 288 64s-168.5 0-213.1 11.5c-23.7 6.3-42.4 24.9-48.6 48.6C16 168.5 16 256 16 256s0 87.5 10.3 131.9c6.3 23.7 24.9 42.4 48.6 48.6C119.5 448 288 448 288 448s168.5 0 213.1-11.5c23.7-6.3 42.4-24.9 48.6-48.6 10.3-44.4 10.3-131.9 10.3-131.9s0-87.5-10.3-131.9zM232 334.1V177.9L361 256 232 334.1z"/></svg>`;
// --- Utilities ---
const Logger = {
prefix: `[${SCRIPT_NAME}]`,
log: (...args) => console.log(Logger.prefix, ...args),
warn: (...args) => console.warn(Logger.prefix, ...args),
error: (...args) => console.error(Logger.prefix, ...args),
};
function delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
function getVideoId(href) {
if (!href) return null;
const match = href.match(REGEX.YOUTUBE);
return match ? match[1] : null;
}
// --- Settings Manager ---
class SettingsManager {
constructor() {
this.settings = {
cacheExpiryDays: DEFAULTS.CACHE_EXPIRY_DAYS,
showThumbnails: DEFAULTS.SHOW_THUMBNAILS
};
}
async load() {
try {
const loadedSettings = await GM.getValue(CACHE_KEY_SETTINGS, this.settings);
// Validate and merge loaded settings
this.settings.cacheExpiryDays = (typeof loadedSettings.cacheExpiryDays === 'number' && Number.isInteger(loadedSettings.cacheExpiryDays) && loadedSettings.cacheExpiryDays > 0)
? loadedSettings.cacheExpiryDays
: DEFAULTS.CACHE_EXPIRY_DAYS;
this.settings.showThumbnails = (typeof loadedSettings.showThumbnails === 'boolean')
? loadedSettings.showThumbnails
: DEFAULTS.SHOW_THUMBNAILS;
Logger.log('Settings loaded:', this.settings);
} catch (e) {
Logger.warn('Failed to load settings, using defaults.', e);
// Reset to defaults on error
this.settings = {
cacheExpiryDays: DEFAULTS.CACHE_EXPIRY_DAYS,
showThumbnails: DEFAULTS.SHOW_THUMBNAILS
};
}
}
async save() {
try {
// Ensure types before saving
this.settings.cacheExpiryDays = Math.max(1, Math.floor(this.settings.cacheExpiryDays || DEFAULTS.CACHE_EXPIRY_DAYS));
this.settings.showThumbnails = !!this.settings.showThumbnails;
await GM.setValue(CACHE_KEY_SETTINGS, this.settings);
Logger.log('Settings saved:', this.settings);
} catch (e) {
Logger.error('Failed to save settings.', e);
}
}
get cacheExpiryDays() {
return this.settings.cacheExpiryDays;
}
set cacheExpiryDays(days) {
const val = parseInt(days, 10);
if (!isNaN(val) && val > 0) {
this.settings.cacheExpiryDays = val;
} else {
Logger.warn(`Attempted to set invalid cacheExpiryDays: ${days}`);
}
}
get showThumbnails() {
return this.settings.showThumbnails;
}
set showThumbnails(value) {
this.settings.showThumbnails = !!value;
}
}
// --- Title Cache ---
class TitleCache {
constructor(settingsManager) {
this.settings = settingsManager; // Reference to settings
this.cache = null; // Lazy loaded
}
async _loadCache() {
if (this.cache === null) {
try {
this.cache = await GM.getValue(CACHE_KEY_TITLES, {});
} catch (e) {
Logger.warn('Failed to load title cache:', e);
this.cache = {}; // Use empty cache on error
}
}
return this.cache;
}
async _saveCache() {
if (this.cache === null) return; // Don't save if never loaded
try {
await GM.setValue(CACHE_KEY_TITLES, this.cache);
} catch (e) {
Logger.warn('Failed to save title cache:', e);
}
}
async getTitle(videoId) {
const cache = await this._loadCache();
const item = cache[videoId];
if (item && typeof item.expiry === 'number' && item.expiry > Date.now()) {
return item.title;
}
// If expired or not found, remove old entry (if exists) and return null
if (item) {
delete cache[videoId];
await this._saveCache(); // Save removal
}
return null;
}
async setTitle(videoId, title) {
if (!videoId || typeof title !== 'string') return;
const cache = await this._loadCache();
const expiryDays = this.settings.cacheExpiryDays;
const expiryTime = Date.now() + (expiryDays * 24 * 60 * 60 * 1000);
cache[videoId] = { title: title, expiry: expiryTime };
await this._saveCache();
}
async clearExpired() {
// Only run cleanup occasionally
if (Math.random() >= DEFAULTS.CACHE_CLEANUP_PROBABILITY) return 0;
const cache = await this._loadCache();
const now = Date.now();
let changed = false;
let malformedCount = 0;
let expiredCount = 0;
for (const videoId in cache) {
if (Object.hasOwnProperty.call(cache, videoId)) {
const item = cache[videoId];
// Check for invalid format or expiry
if (!item || typeof item.title !== 'string' || typeof item.expiry !== 'number' || item.expiry <= now) {
delete cache[videoId];
changed = true;
if (item && item.expiry <= now) expiredCount++;
else malformedCount++;
if (!item || typeof item.title !== 'string' || typeof item.expiry !== 'number') {
Logger.warn(`Removed malformed cache entry: ${videoId}`);
}
}
}
}
if (changed) {
await this._saveCache();
const totalCleared = malformedCount + expiredCount;
if (totalCleared > 0) {
Logger.log(`Cleared ${totalCleared} cache entries (${expiredCount} expired, ${malformedCount} malformed).`);
}
}
return expiredCount + malformedCount;
}
async purgeAll() {
try {
this.cache = {}; // Clear in-memory cache
await GM.setValue(CACHE_KEY_TITLES, {}); // Clear storage
Logger.log('Title cache purged successfully.');
return true;
} catch (e) {
Logger.error('Failed to purge title cache:', e);
return false;
}
}
}
// --- API Fetcher ---
class ApiFetcher {
async fetchVideoData(videoId) {
const url = URL_TEMPLATES.OEMBED.replace('VIDEO_ID', videoId);
return new Promise((resolve, reject) => {
GM.xmlHttpRequest({
method: "GET",
url: url,
responseType: "json",
timeout: 10000,
onload: (response) => {
if (response.status === 200 && response.response?.title) {
resolve(response.response);
} else if ([401, 403, 404].includes(response.status)) {
reject(new Error(`Video unavailable (Status: ${response.status})`));
} else {
reject(new Error(`oEmbed request failed (${response.statusText || `Status ${response.status}`})`));
}
},
onerror: (err) => reject(new Error(`GM.xmlHttpRequest error: ${err.error || 'Network error'}`)),
ontimeout: () => reject(new Error('oEmbed request timed out')),
});
});
}
async fetchThumbnailAsDataURL(videoId) {
const thumbnailUrl = URL_TEMPLATES.THUMBNAIL_WEBP.replace('VIDEO_ID', videoId);
return new Promise((resolve) => {
GM.xmlHttpRequest({
method: "GET",
url: thumbnailUrl,
responseType: 'blob',
timeout: 8000, // Slightly shorter timeout for images
onload: (response) => {
if (response.status === 200 && response.response) {
const reader = new FileReader();
reader.onloadend = () => resolve(reader.result); // result is the Data URL
reader.onerror = (err) => {
Logger.warn(`FileReader error for thumbnail ${videoId}:`, err);
resolve(null); // Resolve with null on reader error
};
reader.readAsDataURL(response.response);
} else {
// Log non-200 status for debugging, but still resolve null
if(response.status !== 404) Logger.warn(`Thumbnail fetch failed for ${videoId} (Status: ${response.status})`);
resolve(null);
}
},
onerror: (err) => {
Logger.error(`GM.xmlHttpRequest error fetching thumbnail for ${videoId}:`, err);
resolve(null);
},
ontimeout: () => {
Logger.warn(`Timeout fetching thumbnail for ${videoId}`);
resolve(null);
}
});
});
}
}
// --- Link Enhancer (DOM Manipulation) ---
class LinkEnhancer {
constructor(titleCache, apiFetcher, settingsManager) {
this.cache = titleCache;
this.api = apiFetcher;
this.settings = settingsManager;
this.styleAdded = false;
this.processingLinks = new Set(); // Track links currently being fetched
}
addStyles() {
if (this.styleAdded) return;
const encodedSvg = `data:image/svg+xml;base64,${btoa(YOUTUBE_ICON_SVG)}`;
const styles = `
.youtubelink {
position: relative;
padding-left: 20px; /* Space for icon */
display: inline-block; /* Prevent line breaks inside link */
white-space: nowrap;
text-decoration: none !important;
/* Optional: slightly adjust vertical alignment if needed */
/* vertical-align: middle; */
}
.youtubelink:hover {
text-decoration: underline !important;
}
.youtubelink::before {
content: '';
position: absolute;
left: 0px;
top: 50%;
transform: translateY(-50%);
width: 16px; /* Icon size */
height: 16px;
background-image: url("${encodedSvg}");
background-repeat: no-repeat;
background-size: contain;
background-position: center;
/* vertical-align: middle; /* Align icon with text */
}
/* Thumbnail Popup Styles */
#${DEFAULTS.THUMBNAIL_POPUP_ID} {
position: fixed; display: none; z-index: 10000;
border: 1px solid #555; background-color: #282828;
padding: 2px; border-radius: 2px;
box-shadow: 3px 3px 8px rgba(0,0,0,0.4);
pointer-events: none; /* Don't interfere with mouse events */
max-width: 320px; max-height: 180px; overflow: hidden;
}
#${DEFAULTS.THUMBNAIL_POPUP_ID} img {
display: block; width: 100%; height: auto;
max-height: 176px; /* Max height inside padding */
object-fit: contain; background-color: #111;
}
/* Settings Panel Content (Scoped to parent div) */
#${SCRIPT_ID}-panel-content > div { margin-bottom: 10px; }
#${SCRIPT_ID}-panel-content input[type="number"] {
width: 60px; padding: 3px; margin-left: 5px;
border: 1px solid var(--settings-input-border, #ccc);
background-color: var(--settings-input-bg, #fff);
color: var(--settings-text, #000); box-sizing: border-box;
}
#${SCRIPT_ID}-panel-content input[type="checkbox"] { margin-right: 5px; vertical-align: middle; }
#${SCRIPT_ID}-panel-content label.small { vertical-align: middle; font-size: 0.95em; }
#${SCRIPT_ID}-panel-content button { margin-top: 5px; margin-right: 10px; padding: 4px 8px; }
#${SCRIPT_ID}-save-status, #${SCRIPT_ID}-purge-status {
margin-left: 10px; font-size: 0.9em;
color: var(--settings-text, #ccc); font-style: italic;
}
`;
GM_addStyle(styles);
this.styleAdded = true;
Logger.log('Styles added.');
}
cleanLinkUrl(linkElement) {
if (!linkElement?.href) return;
const originalHref = linkElement.href;
let cleanHref = originalHref;
// Normalize youtu.be, /live/, /shorts/ to standard watch?v= format
if (cleanHref.includes('youtu.be/')) {
const videoId = getVideoId(cleanHref);
if (videoId) {
const url = new URL(cleanHref);
const timestamp = url.searchParams.get('t');
cleanHref = `https://www.youtube.com/watch?v=${videoId}${timestamp ? `&t=${timestamp}` : ''}`;
}
} else {
cleanHref = cleanHref.replace('/live/', '/watch?v=')
.replace('/shorts/', '/watch?v=')
.replace('/embed/', '/watch?v=')
.replace('/v/', '/watch?v=');
}
// Remove tracking parameters more reliably using URL API
try {
const url = new URL(cleanHref);
const paramsToRemove = ['si', 'feature', 'ref', 'fsi', 'source', 'utm_source', 'utm_medium', 'utm_campaign', 'gclid', 'gclsrc', 'fbclid'];
let changedParams = false;
paramsToRemove.forEach(param => {
if (url.searchParams.has(param)) {
url.searchParams.delete(param);
changedParams = true;
}
});
if (changedParams) {
cleanHref = url.toString();
}
} catch (e) {
// Fallback to regex if URL parsing fails (e.g., malformed URL initially)
cleanHref = cleanHref.replace(REGEX.YOUTUBE_TRACKING_PARAMS, '');
cleanHref = cleanHref.replace(/(\?|&)$/, ''); // Remove trailing ? or &
cleanHref = cleanHref.replace('?&', '?'); // Fix "?&" case
}
if (cleanHref !== originalHref) {
try {
linkElement.href = cleanHref;
// Only update text if it exactly matched the old URL
if (linkElement.textContent.trim() === originalHref.trim()) {
linkElement.textContent = cleanHref;
}
} catch (e) {
// This can happen if the element is removed from DOM during processing
Logger.warn("Failed to update link href/text (element might be gone):", linkElement.textContent, e);
}
}
}
findLinksInNode(node) {
if (!node || node.nodeType !== Node.ELEMENT_NODE) return [];
const links = [];
// Check if the node itself is a link in the target area
if (node.matches && node.matches('.divMessage a')) {
links.push(node);
}
// Find links within the node (or descendants) that are inside a .divMessage
if (node.querySelectorAll) {
const potentialLinks = node.querySelectorAll('.divMessage a');
potentialLinks.forEach(link => {
// Ensure the link is actually *within* a .divMessage that is a descendant of (or is) the input node
if (node.contains(link) && link.closest('.divMessage')) {
links.push(link);
}
});
}
// Return unique links only
return [...new Set(links)];
}
async processLinks(links) {
if (!links || links.length === 0) return;
// Perform opportunistic cache cleanup *before* heavy processing
await this.cache.clearExpired();
const linksToFetch = [];
for (const link of links) {
// Skip if already enhanced, marked as failed for a different reason, or currently being fetched
// Note: We specifically allow reprocessing if ytFailed is 'no-id' from a previous incorrect run
if (link.dataset.ytEnhanced ||
(link.dataset.ytFailed && link.dataset.ytFailed !== 'no-id') ||
this.processingLinks.has(link)) {
continue;
}
// --- Skip quotelinks ---
if (link.classList.contains('quoteLink')) {
// Mark as skipped so we don't check again
link.dataset.ytFailed = 'skipped-type';
continue; // Skip this link entirely, don't process further
}
// --- PRIMARY FIX: Check for Video ID FIRST ---
const videoId = getVideoId(link.href);
if (!videoId) {
// It's NOT a YouTube link, or not one we can parse.
// Mark as failed so we don't re-check it constantly.
// Crucially, DO NOT call cleanLinkUrl or _applyTitle.
link.dataset.ytFailed = 'no-id';
// Optional: Remove old enhancement classes/data if they exist from a bad run
// link.classList.remove("youtubelink");
// delete link.dataset.videoId;
continue; // Move to the next link in the list
}
// --- If we reach here, it IS a potential YouTube link ---
// Now it's safe to clean the URL (only affects confirmed YT links)
this.cleanLinkUrl(link);
// Add video ID attribute now that we know it's a YT link
link.dataset.videoId = videoId;
// Clear any previous 'no-id' failure flag if it existed
delete link.dataset.ytFailed;
// Check cache for the title
const cachedTitle = await this.cache.getTitle(videoId);
if (cachedTitle !== null) {
// Title found in cache, apply it directly
this._applyTitle(link, videoId, cachedTitle);
} else {
// Title not cached, mark for fetching
this.processingLinks.add(link);
linksToFetch.push({ link, videoId });
}
} // End of loop through links
// --- Process the batch of links needing API fetches ---
if (linksToFetch.length === 0) {
// Log only if there were links initially, but none needed fetching
if (links.length > 0) Logger.log('No new links require title fetching.');
return;
}
Logger.log(`Fetching titles for ${linksToFetch.length} links...`);
// Fetch titles sequentially with delay
for (let i = 0; i < linksToFetch.length; i++) {
const { link, videoId } = linksToFetch[i];
// Double check if link still exists in DOM before fetching
if (!document.body.contains(link)) {
this.processingLinks.delete(link);
Logger.warn(`Link removed from DOM before title fetch: ${videoId}`);
continue;
}
// Also check if it somehow got enhanced while waiting (e.g., duplicate link processed faster)
if (link.dataset.ytEnhanced) {
this.processingLinks.delete(link);
continue;
}
try {
const videoData = await this.api.fetchVideoData(videoId);
const title = videoData.title.trim() || '[Untitled Video]'; // Handle empty titles
this._applyTitle(link, videoId, title);
await this.cache.setTitle(videoId, title);
} catch (e) {
Logger.warn(`Failed to enhance link ${videoId}: ${e.message}`);
// Apply error state visually AND cache it
this._applyTitle(link, videoId, "[YT Fetch Error]"); // Show error to user
await this.cache.setTitle(videoId, "[YT Fetch Error]"); // Cache error state
link.dataset.ytFailed = 'fetch-error'; // Mark specific failure type
} finally {
this.processingLinks.delete(link); // Remove from processing set regardless of outcome
}
// Apply delay between API calls
if (i < linksToFetch.length - 1) {
await delay(DEFAULTS.API_DELAY_MS);
}
}
Logger.log(`Finished fetching batch.`);
}
_applyTitle(link, videoId, title) {
// Check if link still exists before modifying
if (!document.body.contains(link)) {
Logger.warn(`Link removed from DOM before applying title: ${videoId}`);
return;
}
const displayTitle = (title === "[YT Fetch Error]") ? '[YT Error]' : title;
// Use textContent for security, avoid potential HTML injection from titles
link.textContent = `${displayTitle} [${videoId}]`;
link.classList.add("youtubelink");
link.dataset.ytEnhanced = "true"; // Mark as successfully enhanced
delete link.dataset.ytFailed; // Remove failed flag if it was set previously
}
// Force re-enhancement of all currently enhanced/failed links
async reEnhanceAll() {
Logger.log('Triggering re-enhancement of all detected YouTube links...');
const links = document.querySelectorAll('a[data-video-id]');
links.forEach(link => {
delete link.dataset.ytEnhanced;
delete link.dataset.ytFailed;
// Reset text content only if it looks like our format, otherwise leave user-edited text
if (link.classList.contains('youtubelink')) {
const videoId = link.dataset.videoId;
// Basic reset, might need refinement based on how cleanLinkUrl behaves
link.textContent = link.href;
this.cleanLinkUrl(link); // Re-clean the URL just in case
}
link.classList.remove('youtubelink');
});
await this.processLinks(Array.from(links)); // Process them again
Logger.log('Re-enhancement process finished.');
}
}
// --- Thumbnail Preview ---
class ThumbnailPreview {
constructor(settingsManager, apiFetcher) {
this.settings = settingsManager;
this.api = apiFetcher;
this.popupElement = null;
this.imageElement = null;
this.currentVideoId = null;
this.isHovering = false;
this.hideTimeout = null;
this.fetchController = null; // AbortController for fetch
}
createPopupElement() {
if (document.getElementById(DEFAULTS.THUMBNAIL_POPUP_ID)) {
this.popupElement = document.getElementById(DEFAULTS.THUMBNAIL_POPUP_ID);
this.imageElement = this.popupElement.querySelector('img');
if (!this.imageElement) { // Fix if img somehow got removed
this.imageElement = document.createElement('img');
this.imageElement.alt = "YouTube Thumbnail Preview";
this.popupElement.appendChild(this.imageElement);
}
Logger.log('Re-using existing thumbnail popup element.');
return;
}
this.popupElement = document.createElement('div');
this.popupElement.id = DEFAULTS.THUMBNAIL_POPUP_ID;
this.imageElement = document.createElement('img');
this.imageElement.alt = "YouTube Thumbnail Preview";
this.imageElement.src = PLACEHOLDER_IMG_SRC;
this.imageElement.onerror = () => {
// Don't log error if we aborted the load or hid the popup
if (this.isHovering && this.imageElement.src !== PLACEHOLDER_IMG_SRC) {
Logger.warn(`Thumbnail image failed to load data for video ${this.currentVideoId || '(unknown)'}.`);
}
this.hide(); // Hide on error
};
this.popupElement.appendChild(this.imageElement);
document.body.appendChild(this.popupElement);
Logger.log('Thumbnail popup created.');
}
handleMouseOver(event) {
if (!this.settings.showThumbnails || !this.popupElement) return;
const link = event.target.closest('.youtubelink[data-video-id]');
if (!link) return;
const videoId = link.dataset.videoId;
if (!videoId) return;
// Clear any pending hide action
if (this.hideTimeout) {
clearTimeout(this.hideTimeout);
this.hideTimeout = null;
}
this.isHovering = true;
// If it's a different video or the popup is hidden, show it
if (videoId !== this.currentVideoId || this.popupElement.style.display === 'none') {
this.currentVideoId = videoId;
// Abort previous fetch if any
this.fetchController?.abort();
this.fetchController = new AbortController();
this.show(event, videoId, this.fetchController.signal);
}
}
handleMouseOut(event) {
if (!this.settings.showThumbnails || !this.isHovering) return;
const link = event.target.closest('.youtubelink[data-video-id]');
if (!link) return; // Mouse out event not from a target link or its children
// Check if the mouse moved to the popup itself (though pointer-events: none should prevent this)
// or to another element still within the original link
if (event.relatedTarget && (link.contains(event.relatedTarget) || this.popupElement?.contains(event.relatedTarget))) {
return;
}
// Use a short delay before hiding
this.hideTimeout = setTimeout(() => {
this.isHovering = false;
this.currentVideoId = null;
this.fetchController?.abort(); // Abort fetch if mouse moves away quickly
this.fetchController = null;
this.hide();
this.hideTimeout = null;
}, DEFAULTS.THUMBNAIL_HIDE_DELAY_MS);
}
async show(event, videoId, signal) {
if (!this.isHovering || !this.popupElement || !this.imageElement) return;
// Reset image while loading
this.imageElement.src = PLACEHOLDER_IMG_SRC;
this.popupElement.style.display = 'block'; // Show popup frame immediately
this.positionPopup(event); // Position based on initial event
try {
const dataUrl = await this.api.fetchThumbnailAsDataURL(videoId);
// Check if fetch was aborted or if state changed during await
if (signal?.aborted || !this.isHovering || videoId !== this.currentVideoId) {
if (this.popupElement.style.display !== 'none') this.hide();
return;
}
if (dataUrl) {
this.imageElement.src = dataUrl;
// Reposition after image loads, as dimensions might change slightly
// Use requestAnimationFrame for smoother updates if needed, but direct might be fine
this.positionPopup(event);
this.popupElement.style.display = 'block'; // Ensure it's visible
} else {
Logger.warn(`No thumbnail data URL received for ${videoId}. Hiding popup.`);
this.hide();
}
} catch (error) {
if (error.name === 'AbortError') {
Logger.log(`Thumbnail fetch aborted for ${videoId}.`);
} else {
Logger.error(`Error fetching thumbnail for ${videoId}:`, error);
}
this.hide(); // Hide on error
}
}
positionPopup(event) {
if (!this.popupElement) return;
const offsetX = 15;
const offsetY = 15;
const buffer = 5; // Buffer from window edge
// Get potential dimensions (use max dimensions as fallback)
const popupWidth = this.popupElement.offsetWidth || 320;
const popupHeight = this.popupElement.offsetHeight || 180;
const winWidth = window.innerWidth;
const winHeight = window.innerHeight;
const mouseX = event.clientX;
const mouseY = event.clientY;
let x = mouseX + offsetX;
let y = mouseY + offsetY;
// Adjust horizontal position
if (x + popupWidth + buffer > winWidth) {
x = mouseX - popupWidth - offsetX; // Flip to left
}
x = Math.max(buffer, x); // Ensure it's not off-screen left
// Adjust vertical position
if (y + popupHeight + buffer > winHeight) {
y = mouseY - popupHeight - offsetY; // Flip to top
}
y = Math.max(buffer, y); // Ensure it's not off-screen top
this.popupElement.style.left = `${x}px`;
this.popupElement.style.top = `${y}px`;
}
hide() {
if (this.popupElement) {
this.popupElement.style.display = 'none';
}
if (this.imageElement) {
this.imageElement.src = PLACEHOLDER_IMG_SRC; // Reset image
}
// Don't reset currentVideoId here, mouseover might happen again quickly
}
attachListeners() {
document.body.addEventListener('mouseover', this.handleMouseOver.bind(this));
document.body.addEventListener('mouseout', this.handleMouseOut.bind(this));
Logger.log('Thumbnail hover listeners attached.');
}
}
// --- Settings UI (STM Integration) ---
class SettingsUI {
constructor(settingsManager, titleCache, linkEnhancer) {
this.settings = settingsManager;
this.cache = titleCache;
this.enhancer = linkEnhancer;
this.stmRegistrationAttempted = false; // Prevent multiple attempts if somehow called again
}
// Called by STM when the panel needs to be initialized
initializePanel(panelElement) {
Logger.log(`STM Initializing panel for ${SCRIPT_ID}`);
// Use a specific ID for the content wrapper for easier targeting
panelElement.innerHTML = `
<div id="${SCRIPT_ID}-panel-content">
<div>
<strong>Title Cache:</strong><br>
<label for="${SCRIPT_ID}-cache-expiry" class="small">Title Cache Expiry (Days):</label>
<input type="number" id="${SCRIPT_ID}-cache-expiry" min="1" step="1" value="${this.settings.cacheExpiryDays}" title="Number of days to cache YouTube video titles">
</div>
<div>
<button id="${SCRIPT_ID}-purge-cache">Purge Title Cache</button>
<span id="${SCRIPT_ID}-purge-status"></span>
</div>
<hr style="border-color: #444; margin: 10px 0;">
<div>
<strong>Thumbnail Preview:</strong><br>
<input type="checkbox" id="${SCRIPT_ID}-show-thumbnails" ${this.settings.showThumbnails ? 'checked' : ''}>
<label for="${SCRIPT_ID}-show-thumbnails" class="small">Show Thumbnails on Hover</label>
</div>
<hr style="border-color: #444; margin: 15px 0 10px;">
<div>
<button id="${SCRIPT_ID}-save-settings">Save Settings</button>
<span id="${SCRIPT_ID}-save-status"></span>
</div>
</div>`;
// Attach listeners using the specific IDs
panelElement.querySelector(`#${SCRIPT_ID}-save-settings`)?.addEventListener('click', () => this.handleSaveClick(panelElement));
panelElement.querySelector(`#${SCRIPT_ID}-purge-cache`)?.addEventListener('click', () => this.handlePurgeClick(panelElement));
}
// Called by STM when the tab is activated
activatePanel(panelElement) {
Logger.log(`STM Activating panel for ${SCRIPT_ID}`);
const contentWrapper = panelElement.querySelector(`#${SCRIPT_ID}-panel-content`);
if (!contentWrapper) return;
// Update input values from current settings
const expiryInput = contentWrapper.querySelector(`#${SCRIPT_ID}-cache-expiry`);
const thumbCheckbox = contentWrapper.querySelector(`#${SCRIPT_ID}-show-thumbnails`);
const saveStatusSpan = contentWrapper.querySelector(`#${SCRIPT_ID}-save-status`);
const purgeStatusSpan = contentWrapper.querySelector(`#${SCRIPT_ID}-purge-status`);
if (expiryInput) expiryInput.value = this.settings.cacheExpiryDays;
if (thumbCheckbox) thumbCheckbox.checked = this.settings.showThumbnails;
// Clear status messages on activation
if (saveStatusSpan) saveStatusSpan.textContent = '';
if (purgeStatusSpan) purgeStatusSpan.textContent = '';
}
async handleSaveClick(panelElement) {
const contentWrapper = panelElement.querySelector(`#${SCRIPT_ID}-panel-content`);
if (!contentWrapper) { Logger.error("Cannot find panel content for saving."); return; }
const expiryInput = contentWrapper.querySelector(`#${SCRIPT_ID}-cache-expiry`);
const thumbCheckbox = contentWrapper.querySelector(`#${SCRIPT_ID}-show-thumbnails`);
const statusSpan = contentWrapper.querySelector(`#${SCRIPT_ID}-save-status`);
if (!expiryInput || !thumbCheckbox || !statusSpan) { Logger.error("Missing settings elements in panel."); return; }
const days = parseInt(expiryInput.value, 10);
if (isNaN(days) || days <= 0 || !Number.isInteger(days)) {
this.showStatus(statusSpan, 'Invalid number of days!', 'red');
Logger.warn('Attempted to save invalid cache expiry days:', expiryInput.value);
return;
}
// Update settings via the SettingsManager instance
this.settings.cacheExpiryDays = days;
this.settings.showThumbnails = thumbCheckbox.checked;
await this.settings.save();
this.showStatus(statusSpan, 'Settings saved!', 'lime');
Logger.log(`Settings saved via UI: Cache expiry ${days} days, Show Thumbnails ${thumbCheckbox.checked}.`);
// Apply thumbnail setting change immediately
if (!this.settings.showThumbnails) {
// Hide any currently visible thumbnail popup if setting is disabled
const thumbnailPreview = window.ytle?.thumbnailPreview; // Access instance if exposed
thumbnailPreview?.hide();
}
}
async handlePurgeClick(panelElement) {
const contentWrapper = panelElement.querySelector(`#${SCRIPT_ID}-panel-content`);
if (!contentWrapper) { Logger.error("Cannot find panel content for purging."); return; }
const statusSpan = contentWrapper.querySelector(`#${SCRIPT_ID}-purge-status`);
if (!statusSpan) { Logger.error("Missing purge status element."); return; }
if (!confirm('Are you sure you want to purge the entire YouTube title cache?\nThis cannot be undone and will trigger re-fetching of all titles.')) {
this.showStatus(statusSpan, 'Purge cancelled.', 'grey');
return;
}
this.showStatus(statusSpan, 'Purging cache...', 'orange');
const success = await this.cache.purgeAll();
if (success) {
this.showStatus(statusSpan, 'Cache purged! Re-enhancing links...', 'lime');
// Trigger a re-enhancement of all known links
await this.enhancer.reEnhanceAll();
this.showStatus(statusSpan, 'Cache purged! Re-enhancement complete.', 'lime', 3000); // Update message after re-enhancement
} else {
this.showStatus(statusSpan, 'Purge failed!', 'red');
}
}
showStatus(spanElement, message, color, duration = 3000) {
if (!spanElement) return;
spanElement.textContent = message;
spanElement.style.color = color;
// Clear message after duration, only if the message hasn't changed
setTimeout(() => {
if (spanElement.textContent === message) {
spanElement.textContent = '';
spanElement.style.color = 'var(--settings-text, #ccc)'; // Reset color
}
}, duration);
}
// --- Updated STM Registration with Timeout ---
async registerWithSTM() {
if (this.stmRegistrationAttempted) {
Logger.log('STM registration already attempted, skipping.');
return;
}
this.stmRegistrationAttempted = true;
let stmAttempts = 0;
const MAX_STM_ATTEMPTS = 20; // 20 attempts
const STM_RETRY_DELAY_MS = 250; // 250ms delay
const MAX_WAIT_TIME_MS = MAX_STM_ATTEMPTS * STM_RETRY_DELAY_MS; // ~5 seconds total
const checkAndRegister = () => {
stmAttempts++;
// Use Logger.log for debugging attempts if needed
// Logger.log(`STM check attempt ${stmAttempts}/${MAX_STM_ATTEMPTS}...`);
// *** Check unsafeWindow directly ***
if (typeof unsafeWindow !== 'undefined'
&& typeof unsafeWindow.SettingsTabManager !== 'undefined'
&& typeof unsafeWindow.SettingsTabManager.ready !== 'undefined')
{
Logger.log('Found SettingsTabManager on unsafeWindow. Proceeding with registration...');
// Found it, call the async registration function, but don't wait for it here.
// Let the rest of the script initialization continue.
performStmRegistration().catch(err => {
Logger.error("Async registration with STM failed after finding it:", err);
// Even if registration fails *after* finding STM, we proceed without the panel.
});
// STM found (or at least its .ready property), stop polling.
return; // Exit the polling function
}
// STM not found/ready yet, check if we should give up
if (stmAttempts >= MAX_STM_ATTEMPTS) {
Logger.warn(`SettingsTabManager not found or not ready after ${MAX_STM_ATTEMPTS} attempts (${(MAX_WAIT_TIME_MS / 1000).toFixed(1)} seconds). Proceeding without settings panel.`);
// Give up polling, DO NOT call setTimeout again.
return; // Exit the polling function
}
// STM not found, limit not reached, schedule next attempt
// Optional: Log if STM exists but .ready is missing
// if (typeof unsafeWindow !== 'undefined' && typeof unsafeWindow.SettingsTabManager !== 'undefined') {
// Logger.log('Found SettingsTabManager on unsafeWindow, but .ready property is missing. Waiting...');
// } else {
// Logger.log('SettingsTabManager not found on unsafeWindow or not ready yet. Waiting...');
// }
setTimeout(checkAndRegister, STM_RETRY_DELAY_MS); // Retry after a delay
};
const performStmRegistration = async () => {
// This function now only runs if STM.ready was detected
try {
// *** Access via unsafeWindow ***
// Ensure SettingsTabManager and .ready still exist before awaiting
if (typeof unsafeWindow?.SettingsTabManager?.ready === 'undefined') {
// Should not happen if called correctly, but check defensively
Logger.error('SettingsTabManager.ready disappeared before registration could complete.');
return; // Cannot register
}
const STM = await unsafeWindow.SettingsTabManager.ready;
// *** End Access via unsafeWindow ***
Logger.log('SettingsTabManager ready, registering tab...');
const registrationSuccess = STM.registerTab({
scriptId: SCRIPT_ID,
tabTitle: SCRIPT_NAME,
order: 110, // Keep your desired order
onInit: this.initializePanel.bind(this),
onActivate: this.activatePanel.bind(this)
});
if (registrationSuccess) {
Logger.log(`Tab registration request sent successfully for ${SCRIPT_ID}.`);
} else {
Logger.warn(`STM registration for ${SCRIPT_ID} returned false (tab might already exist or other issue).`);
}
} catch (err) {
Logger.error('Failed during SettingsTabManager.ready await or registerTab call:', err);
// No need to retry here, just log the failure.
}
};
// Start the check/wait process *asynchronously*.
// This allows the main script initialization to continue immediately.
checkAndRegister();
}
}
// --- Main Application Class ---
class YouTubeLinkEnhancerApp {
constructor() {
this.settingsManager = new SettingsManager();
this.titleCache = new TitleCache(this.settingsManager);
this.apiFetcher = new ApiFetcher();
this.linkEnhancer = new LinkEnhancer(this.titleCache, this.apiFetcher, this.settingsManager);
this.thumbnailPreview = new ThumbnailPreview(this.settingsManager, this.apiFetcher);
this.settingsUI = new SettingsUI(this.settingsManager, this.titleCache, this.linkEnhancer);
this.observer = null;
// Expose instances for debugging/potential external interaction (optional)
// Be cautious with exposing internal state/methods
window.ytle = {
settings: this.settingsManager,
cache: this.titleCache,
enhancer: this.linkEnhancer,
thumbnailPreview: this.thumbnailPreview,
ui: this.settingsUI
};
}
async initialize() {
Logger.log('Initializing...');
// 1. Load settings
await this.settingsManager.load();
// 2. Add styles & create UI elements
this.linkEnhancer.addStyles();
this.thumbnailPreview.createPopupElement();
// 3. Attach global listeners
this.thumbnailPreview.attachListeners();
// 4. Register settings UI
await this.settingsUI.registerWithSTM();
// 5. Initial scan & process existing links
Logger.log('Running initial link processing...');
const initialLinks = this.linkEnhancer.findLinksInNode(document.body);
await this.linkEnhancer.processLinks(initialLinks);
Logger.log('Initial processing complete.');
// 6. Setup MutationObserver
this.setupObserver();
Logger.log('Initialization complete.');
}
setupObserver() {
this.observer = new MutationObserver(async (mutationsList) => {
let linksToProcess = new Set();
for (const mutation of mutationsList) {
if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
for (const addedNode of mutation.addedNodes) {
// Only process element nodes
if (addedNode.nodeType === Node.ELEMENT_NODE) {
const foundLinks = this.linkEnhancer.findLinksInNode(addedNode);
foundLinks.forEach(link => {
// Add link if it's potentially enhanceable (no videoId yet, or failed/not enhanced)
if (!link.dataset.videoId || !link.dataset.ytEnhanced || link.dataset.ytFailed) {
linksToProcess.add(link);
}
});
}
}
}
// Optional: Handle attribute changes if needed (e.g., href changes on existing links)
// else if (mutation.type === 'attributes' && mutation.attributeName === 'href') {
// const targetLink = mutation.target;
// if (targetLink.matches && targetLink.matches('.divMessage a') && targetLink.closest('.divMessage')) {
// // Handle potential re-enhancement if href changed
// delete targetLink.dataset.ytEnhanced;
// delete targetLink.dataset.ytFailed;
// delete targetLink.dataset.videoId;
// targetLink.classList.remove('youtubelink');
// linksToProcess.add(targetLink);
// }
//}
}
if (linksToProcess.size > 0) {
// Debounce slightly? Or process immediately? Immediate is simpler.
Logger.log(`Observer detected ${linksToProcess.size} new/updated potential links.`);
await this.linkEnhancer.processLinks([...linksToProcess]);
}
});
this.observer.observe(document.body, {
childList: true,
subtree: true,
// attributes: true, // Uncomment if you want to observe href changes
// attributeFilter: ['href'] // Only observe href attribute changes
});
Logger.log('MutationObserver started.');
}
}
// --- Script Entry Point ---
const app = new YouTubeLinkEnhancerApp();
app.initialize().catch(err => {
Logger.error("Initialization failed:", err);
});
})();
