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youtube-chat-filter.user.js
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youtube-chat-filter.user.js
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// ==UserScript==
// @name Chat Filter for Youtube Live
// @namespace ChatFilterForYoutubeLive
// @description Filter chats for Youtube Live
// @version 0.3
// @author wurdn
// @match https://www.youtube.com/*
// @require https://code.jquery.com/jquery-3.3.1.min.js
// @require https://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/js/toastr.min.js
// @resource toastrCSS https://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/css/toastr.min.css
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_addStyle
// @grant GM_getResourceText
// @noframes
// ==/UserScript==
(function () {
GM_addStyle(GM_getResourceText("toastrCSS"));
let USER_CONFIG = {
NGWords: GM_getValue("CFY_NG_WORDS") || "",
NGRegexpPatterns: GM_getValue("CFY_NG_REG_WORDS") || "",
};
const LIVE_PAGE = {
getChatField: () => {
let chatField;
if (document.getElementById("chatframe") !== null) {
chatField = document
.getElementById("chatframe")
.contentDocument.querySelector(
"#items.style-scope.yt-live-chat-item-list-renderer"
);
} else {
chatField = document.querySelector(
"#items.style-scope.yt-live-chat-item-list-renderer"
);
}
return chatField;
},
};
const SETTINGS = {
DisplaySettingPanel: false,
NGWords: [],
NGRegexpPatterns: [],
};
const log = (mes) => {
console.log(`[CFY] ${mes}`);
};
$(document).ready(() => {
setTimeout(function () {
findChatField();
}, 1000);
});
// URL change observer
let storedHref = location.href;
var findChatFieldInterval;
const findChatField = () => {
let FindCount = 1;
clearInterval(findChatFieldInterval);
const findChatField = function () {
FindCount++;
if (FindCount > 180) {
log("The chat field cannot be found");
clearInterval(findChatFieldInterval);
FindCount = 0;
}
if (document.getElementById("chatframe")) {
const chatField = LIVE_PAGE.getChatField();
if (chatField !== null) {
log("Found the chat field: ");
console.log(chatField);
initialize();
clearInterval(findChatFieldInterval);
FindCount = 0;
}
}
};
findChatFieldInterval = setInterval(findChatField, 1000);
};
const URLObserver = new MutationObserver((mutations) => {
mutations.forEach(function () {
if (storedHref !== location.href) {
findChatField();
storedHref = location.href;
log("URL Changed", storedHref, location.href);
}
});
});
URLObserver.disconnect();
URLObserver.observe(document, { childList: true, subtree: true });
const initialize = () => {
initializeSettings();
// Monitor chat field
const chatField = LIVE_PAGE.getChatField();
if (chatField !== null) {
ChatFieldObserver.disconnect();
ChatFieldObserver.observe(chatField, { childList: true });
log("Monitoring chat.");
}
createScriptCSS();
createSettingsPanel();
};
const initializeSettings = () => {
if (GM_getValue("CFY_NG_WORDS") !== undefined) {
SETTINGS.NGWords = USER_CONFIG.NGWords.split(/\r\n|\n/);
}
if (GM_getValue("CFY_NG_REG_WORDS") !== undefined) {
SETTINGS.NGRegexpPatterns = USER_CONFIG.NGRegexpPatterns.split(/\r\n|\n/);
}
};
const createSettingsPanel = () => {
if (document.getElementsByClassName("cfy_settings")[0] !== undefined) {
return;
}
const HTML = `
<div class="cfy_settings">
<div class="cfy_panel" id="cfy-setting-panel-block-or-hide">
<div class="cfy_panel_box">
<div>
<span>Banned Words (case-insensitive)</span>
<div>
<textarea name="cfy_ngwords" id="cfy_ngwords" rows="4" style="resize: horizontal;width: 190px;">${USER_CONFIG.NGWords}</textarea>
</div>
</div>
<div>
<span>Banned Words (regexp)</span>
<div>
<textarea name="cfy_ngwords_reg" id="cfy_ngwords_reg" rows="4" style="resize: horizontal;width: 190px;">${USER_CONFIG.NGRegexpPatterns}</textarea>
</div>
</div>
<div>
<button id="cfy_reload_button" style="bottom: 0;margin: 6px 0px;">Reload</button>
<button id="cfy_input_save_button" style="float: right;bottom: 0px;margin: 6px 0px;">Save</button>
</div>
</div>
</div>
<div name="panelbutton" value="panelbutton" class="cfy_button" id="cfy-setting-panel-button">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" preserveAspectRatio="xMidYMid meet" viewBox="0 0 640 640" width="15" height="15">
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</use>
</g></g></g>
</svg>
</div>
</div>
`;
const menuElement = document
.getElementById("menu-container")
.getElementsByClassName(
"dropdown-trigger style-scope ytd-menu-renderer"
)[0];
menuElement.insertAdjacentHTML("beforebegin", HTML);
// Toggle settings panel
const SETTINGS_PANEL_ELEMENT = document.getElementById(
"cfy-setting-panel-block-or-hide"
);
document.getElementById("cfy-setting-panel-button").onclick = function () {
if (SETTINGS.DisplaySettingPanel) {
SETTINGS_PANEL_ELEMENT.style.visibility = "hidden";
SETTINGS.DisplaySettingPanel = false;
} else {
SETTINGS_PANEL_ELEMENT.style.visibility = "visible";
SETTINGS.DisplaySettingPanel = true;
}
};
// Save settings
document.getElementById("cfy_input_save_button").onclick = function () {
try {
val = document.getElementById("cfy_ngwords").value.trim();
USER_CONFIG.NGWords = val;
GM_setValue("CFY_NG_WORDS", val);
val = document.getElementById("cfy_ngwords_reg").value.trim();
USER_CONFIG.NGRegexpPatterns = val;
GM_setValue("CFY_NG_REG_WORDS", val);
SETTINGS.NGWords = USER_CONFIG.NGWords.split(/\r\n|\n/);
SETTINGS.NGRegexpPatterns = USER_CONFIG.NGRegexpPatterns.split(
/\r\n|\n/
);
toastr.success("Saved.");
} catch (e) {
toastr.error("Error: " + e.message);
}
};
document.getElementById("cfy_reload_button").onclick = function () {
try {
console.log(LIVE_PAGE.getChatField());
initialize();
ChatFieldObserver.disconnect();
ChatFieldObserver.observe(LIVE_PAGE.getChatField(), {
childList: true,
});
toastr.success("Reloaded.");
} catch (e) {
toastr.error("Error: " + e.message);
}
};
};
const createScriptCSS = () => {
const ScriptCSS = document.getElementById("cfy_style");
// Remove any existing CSS already added by this script
if (ScriptCSS) {
ScriptCSS.parentNode.removeChild(ScriptCSS);
}
let ScriptCSS_HTML = `
<style type="text/css" id="cfy_style">
.cfy_panel {
background-color: rgba(30, 30, 30, 0.9);
width: auto;
height: auto;
z-index: 5;
display: inline-block;
visibility: hidden;
position: absolute;
bottom: 35px;
right: 10px;
padding: 10px;
color: #fff;
font-size: 14px;
}
.cfy_panel_box {
width: 210px;
float: left;
padding-left: 5px;
}
.cfy_button {
display: flex;
margin-left: 10px;
align-items: center;
position: relative;
bottom: 1px;
/* z-index: 4; */
color: var(--yt-spec-text-secondary);
height: 100%;
cursor: pointer;
}
#cfy-setting-panel-button {
}
#cfy-setting-panel-button > svg {
margin-right: 10px;
}
.toast {
font-size: 14px;
}
</style>`;
document.body.insertAdjacentHTML("beforeend", ScriptCSS_HTML);
// Youtube CSS settings
// document
// .getElementById("chatframe")
// .contentDocument.querySelector(
// "#item-scroller.animated.yt-live-chat-item-list-renderer #item-offset.yt-live-chat-item-list-renderer"
// ).style.overflow = "unset";
// Toastr setup
toastr.options = {
positionClass: "toast-bottom-left",
timeOut: "2500",
progressBar: true,
newestOnTop: true,
extendedTimeOut: "1000",
};
};
const handleChatFieldMutation = function (mutations) {
mutations.forEach(function (e) {
let addedNodes = e.addedNodes;
if (addedNodes.length <= 0) {
return;
}
for (const commentNode of addedNodes) {
if (commentNode.children.length <= 0) {
continue;
}
const message = parseMessage(commentNode);
if (containsBannedWord(message) || containsBannedRegexp(message)) {
commentNode.style.display = "none";
continue;
}
}
});
};
//--------------Comment related--------------
const ChatFieldObserver = new MutationObserver(handleChatFieldMutation);
// Extract the contents of the comment node
const parseMessage = (commentNode) => {
let messageText = "";
// Look at the child elements of the comment
let commentComponentNodes = Array.from(commentNode.children);
for (const componentNode of commentComponentNodes) {
const childId = componentNode.id;
// Text
if (childId === "content") {
let message = Array.from(componentNode.children).find(
(v) => v.id === "message"
);
messageText = message.innerText;
}
// Superchat
if (childId === "card") {
let content = componentNode.children[1];
let text = content.children[0].innerText;
messageText += text;
}
}
let parsedMessage = {
message: messageText,
};
return parsedMessage;
};
const containsBannedWord = (chatData) => {
if (!USER_CONFIG.NGWords || !chatData.message) {
return false;
}
let target = chatData.message.toLowerCase();
for (let i = 0; i < SETTINGS.NGWords.length; i++) {
if (target.indexOf(SETTINGS.NGWords[i].toLowerCase()) > -1) {
log(`Blocked: ${chatData.message} | ${SETTINGS.NGWords[i]}`);
return true;
}
}
return false;
};
const containsBannedRegexp = (chatData) => {
if (!USER_CONFIG.NGRegexpPatterns || !chatData.message) {
return false;
}
let target = chatData.message.trim();
for (let i = 0; i < SETTINGS.NGRegexpPatterns.length; i++) {
if (SETTINGS.NGRegexpPatterns[i] === "") {
continue;
}
if (RegExp(SETTINGS.NGRegexpPatterns[i]).test(target)) {
log(
`Blocked: ${chatData.message} | ${SETTINGS.NGRegexpPatterns[i]} (regexp)`
);
return true;
}
}
return false;
};
})();