YouTubeライブチャットでハンドルIDをユーザー名に戻すなどなど
// ==UserScript==
// @name YouTube LiveChat handle-id to username
// @author はじっこゆーれー
// @namespace はじっこゆーれー
// @version 1.9
// @description YouTubeライブチャットでハンドルIDをユーザー名に戻すなどなど
// @match https://www.youtube.com/*
// @run-at document-start
// @grant none
// @license MIT
// ==/UserScript==
(function() {
"use strict";
/************ 設定変数 - Settings (ユーザー/ユーザーがここを変更可能 / User-editable settings) ************/
const CONFIG = {
// 有名人表示モードをオンにするか / Enable "Famous User" display mode
showFamousMode: true, // true = ON / false = OFF
// ユーザー名の表示形式 / User display format
// "username" -> ユーザー名のみ / Username only
// "username_handle" -> ユーザー名（ハンドルID） / Username (Handle ID)
// "handle_username" -> ハンドルID（ユーザー名） / Handle ID (Username)
// "handle" -> ハンドルIDのみ / Handle only
displayFormat: "username_handle",
// デバッグモード - console.logを表示するか / Debug mode: Show console.log
showConsoleLog: true, // true = ON / false = OFF
// 有名人階層の閾値 / Famous user thresholds (Total views of last 5 videos)
famousThresholds: [
10000, // 1万以上 / 10k+ views
50000, // 5万以上 / 50k+ views
100000, // 10万以上 / 100k+ views
500000, // 50万以上 / 500k+ views
1000000 // 100万以上 / 1M+ views
],
// 階層別スタイル / Styles applied per threshold level
// order matches famousThresholds array
famousStyles: [
{ textDecoration: "underline" }, // 1万以上 / underline
{ backgroundColor: "#d8ffd0" }, // 5万以上 / light green background
{ backgroundColor: "#d0e7ff" }, // 10万以上 / light blue background
{ backgroundColor: "#fff9c4" }, // 50万以上 / light yellow background
{ backgroundColor: "#ffcdd2" } // 100万以上 / light red background
]
};
/**********************************************************************************************************/
const channelCache = {};
const handleIndex = {};
async function fetchChannelInfoFromRSS(channelId) {
try {
const res = await fetch(`https://www.youtube.com/feeds/videos.xml?channel_id=${channelId}`, {
cache: "no-store",
credentials: "omit"
});
if (!res.ok) return { name: null, totalViews: 0, isFamousLevel: -1 };
const text = await res.text();
const m = text.match(/<title>([^<]+)<\/title>/);
const name = m ? m[1] : null;
let totalViews = 0;
const viewsMatches = [...text.matchAll(/<media:statistics\s+views="(\d+)"\s*\/>/g)];
let count = 0;
for (const match of viewsMatches) {
if (count >= 5) break;
const views = parseInt(match[1], 10);
if (!isNaN(views)) totalViews += views;
count++;
}
// 有名人レベル判定
let isFamousLevel = -1;
if (CONFIG.showFamousMode) {
for (let i = CONFIG.famousThresholds.length - 1; i >= 0; i--) {
if (totalViews >= CONFIG.famousThresholds[i]) {
isFamousLevel = i;
break;
}
}
}
return { name, totalViews, isFamousLevel };
} catch (e) {
console.error("[fetchChannelInfoFromRSS error]", e);
return { name: null, totalViews: 0, isFamousLevel: -1 };
}
}
async function processLiveChatJSON(json) {
const actions = json?.continuationContents?.liveChatContinuation?.actions || [];
for (const act of actions) handleChatAction(act);
const replayActions = json?.continuationContents?.liveChatContinuation?.actions || [];
for (const act of replayActions) {
if (act.replayChatItemAction?.actions) {
for (const ra of act.replayChatItemAction.actions) handleChatAction(ra);
}
}
}
function handleChatAction(act) {
const item =
act?.addChatItemAction?.item?.liveChatTextMessageRenderer ||
act?.addChatItemAction?.item?.liveChatPaidMessageRenderer ||
act?.addChatItemAction?.item?.liveChatPaidStickerRenderer ||
act?.addChatItemAction?.item?.liveChatMembershipItemRenderer;
if (!item) return;
const handle = item?.authorName?.simpleText;
const channelId = item?.authorExternalChannelId;
if (!handle || !channelId) return;
if (channelCache[channelId]?.name && channelCache[channelId].handle === handle) {
replaceExactHandleInDocument(handle, channelCache[channelId]);
return;
}
fetchChannelInfoFromRSS(channelId).then(info => {
const name = info.name || "(取得失敗)";
const cachedData = { handle, name, ...info };
channelCache[channelId] = cachedData;
handleIndex[handle] = channelId;
if (CONFIG.showConsoleLog) console.log(`=== New User Registered ===`);
if (CONFIG.showConsoleLog) console.log(`ChannelID: ${channelId}, Handle: ${handle}, Name: ${name}, TotalViews: ${info.totalViews}, FamousLevel: ${info.isFamousLevel}`);
replaceExactHandleInDocument(handle, cachedData);
});
}
function getDisplayText(handle, name) {
switch (CONFIG.displayFormat) {
case "username": return name;
case "username_handle": return `${name}（${handle.replace("@","＠")}）`;
case "handle_username": return `${handle.replace("@","＠")}（${name}）`;
case "handle": return handle.replace("@","＠");
default: return `${name}（${handle.replace("@","＠")}）`;
}
}
function applyFamousStyle(element, level) {
if (level < 0 || !CONFIG.showFamousMode) return;
const style = CONFIG.famousStyles[level];
Object.assign(element.style, style);
// 背景色がある場合は文字色を黒に固定
if (style.backgroundColor) {
element.style.color = "black";
} else if (style.textDecoration) {
element.style.textDecoration = style.textDecoration;
}
}
function replaceExactHandleInDocument(handle, info) {
if (!handle || !info) return;
const replacementText = getDisplayText(handle, info.name);
const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT, {
acceptNode: node => node.nodeValue?.trim() === handle ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_REJECT
});
const nodesToReplace = [];
let node;
while ((node = walker.nextNode())) nodesToReplace.push(node);
for (const textNode of nodesToReplace) {
if (!textNode || !textNode.parentNode) continue;
const replacementNode = document.createElement("span");
replacementNode.textContent = replacementText;
applyFamousStyle(replacementNode, info.isFamousLevel);
textNode.parentNode.replaceChild(replacementNode, textNode);
}
}
function replaceTextNode(textNode) {
if (!textNode || !textNode.parentNode) return;
const trimmed = textNode.nodeValue?.trim();
if (!trimmed || !handleIndex[trimmed]) return;
const info = channelCache[handleIndex[trimmed]];
if (!info?.name) return;
const replacementNode = document.createElement("span");
replacementNode.textContent = getDisplayText(trimmed, info.name);
applyFamousStyle(replacementNode, info.isFamousLevel);
textNode.parentNode.replaceChild(replacementNode, textNode);
}
function processNode(node) {
if (!node) return;
if (node.nodeType === Node.ELEMENT_NODE && node.nodeName === 'SPAN' && (node.style.textDecoration === 'underline' || node.textContent.includes('（＠'))) {
return;
}
if (node.nodeType === Node.TEXT_NODE) {
replaceTextNode(node);
return;
}
const walker = document.createTreeWalker(node, NodeFilter.SHOW_TEXT, {
acceptNode: n => n.nodeValue?.trim() && handleIndex[n.nodeValue.trim()] ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_REJECT
});
const toReplace = [];
let t;
while ((t = walker.nextNode())) toReplace.push(t);
toReplace.forEach(replaceTextNode);
}
function setupDOMObserver() {
new MutationObserver(mutations => {
for (const m of mutations) {
if (m.addedNodes?.length) m.addedNodes.forEach(processNode);
if (m.type === "characterData" && m.target) replaceTextNode(m.target);
}
}).observe(document.documentElement, { childList: true, subtree: true, characterData: true });
}
const _origFetch = window.fetch;
window.fetch = async function(input, init) {
const url = typeof input === "string" ? input : input?.url;
if (url?.includes("youtubei/v1/live_chat/get_live_chat")) {
const res = await _origFetch(input, init);
try { res.clone().json().then(processLiveChatJSON).catch(() => {}); } catch {}
return res;
}
return _origFetch(input, init);
};
const _origOpen = XMLHttpRequest.prototype.open;
const _origSend = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.open = function(method, url) {
this._tm_url = url;
return _origOpen.apply(this, arguments);
};
XMLHttpRequest.prototype.send = function(body) {
if (this._tm_url?.includes("youtubei/v1/live_chat/get_live_chat")) {
this.addEventListener("load", () => { try { processLiveChatJSON(JSON.parse(this.responseText)); } catch {} });
}
return _origSend.apply(this, arguments);
};
function replacePastComments() {
const chatItems = document.querySelectorAll("yt-live-chat-text-message-renderer, yt-live-chat-paid-message-renderer, yt-live-chat-paid-sticker-renderer, yt-live-chat-membership-item-renderer");
chatItems.forEach(item => processNode(item));
}
function init() {
setupDOMObserver();
setTimeout(replacePastComments, 2000);
console.log("=== YouTube LiveChat Name Replacer (Replay + Past + FamousCheck + Configurable) loaded ===");
}
init();
window.__ytNameReplacerCache = { channelCache, handleIndex };
})();