Telegram Ad Filter

Collapses messages that contain words from the ad-word list

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Telegram Ad Filter
// @version      1.4.1
// @description  Collapses messages that contain words from the ad-word list
// @license      MIT
// @author       VChet
// @icon         https://web.telegram.org/favicon.ico
// @namespace    telegram-ad-filter
// @match        https://web.telegram.org/k/*
// @require      https://openuserjs.org/src/libs/sizzle/GM_config.js
// @grant        GM_addStyle
// @grant        GM_getValue
// @grant        GM_setValue
// @homepage     https://github.com/VChet/telegram-ad-filter
// @homepageURL  https://github.com/VChet/telegram-ad-filter
// @supportURL   https://github.com/VChet/telegram-ad-filter
// ==/UserScript==

/* jshint esversion: 11 */


// src/DOM.ts
var globalStyles = `
  .bubble:not(.has-advertisement) .advertisement,
  .bubble.has-advertisement .bubble-content *:not(.advertisement),
  .bubble.has-advertisement .reply-markup {
    display: none;
  }
  .advertisement {
    padding: 0.5rem 1rem;
    cursor: pointer;
    white-space: nowrap;
    font-style: italic;
    font-size: var(--messages-text-size);
    font-weight: var(--font-weight-bold);
    color: var(--link-color);
  }
  #telegram-ad-filter-settings {
    display: inline-flex;
    justify-content: center;
    width: 24px;
    font-size: 24px;
    color: transparent;
    text-shadow: 0 0 var(--secondary-text-color);
  }
`;
var frameStyle = `
  inset: 115px auto auto 130px;
  border: 1px solid rgb(0, 0, 0);
  height: 300px;
  margin: 0px;
  max-height: 95%;
  max-width: 95%;
  opacity: 1;
  overflow: auto;
  padding: 0px;
  position: fixed;
  width: 75%;
  z-index: 9999;
  display: block;
`;
var popupStyle = `
  #telegram-ad-filter {
    background: #181818;
    color: #ffffff;
  }
  #telegram-ad-filter textarea {
    resize: vertical;
    width: 100%;
    min-height: 150px;
  }
  #telegram-ad-filter .reset, #telegram-ad-filter .reset a, #telegram-ad-filter_buttons_holder {
    color: inherit;
  }
`;
function addSettingsButton(element, callback) {
  const settingsButton = document.createElement("button");
  settingsButton.classList.add("btn-icon", "rp");
  settingsButton.setAttribute("title", "Telegram Ad Filter Settings");
  const ripple = document.createElement("div");
  ripple.classList.add("c-ripple");
  const icon = document.createElement("span");
  icon.id = "telegram-ad-filter-settings";
  icon.textContent = "\u2699\uFE0F";
  settingsButton.append(ripple);
  settingsButton.append(icon);
  settingsButton.addEventListener("click", (event) => {
    event.stopPropagation();
    callback();
  });
  element.append(settingsButton);
}
function handleMessageNode(node, adWords) {
  const message = node.querySelector(".message");
  if (!message || node.querySelector(".advertisement")) {
    return;
  }
  const textContent = message.textContent?.toLowerCase();
  const links = [...message.querySelectorAll("a")].reduce((acc, { href }) => {
    if (href) {
      acc.push(href.toLowerCase());
    }
    return acc;
  }, []);
  if (!textContent && !links.length) {
    return;
  }
  const filters = adWords.map((filter) => filter.toLowerCase());
  const hasMatch = filters.some(
    (filter) => textContent?.includes(filter) || links.some((href) => href.includes(filter))
  );
  if (!hasMatch) {
    return;
  }
  const trigger = document.createElement("div");
  trigger.classList.add("advertisement");
  trigger.textContent = "Hidden by filter";
  node.querySelector(".bubble-content")?.prepend(trigger);
  node.classList.add("has-advertisement");
  trigger.addEventListener("click", () => {
    node.classList.remove("has-advertisement");
  });
  message.addEventListener("click", () => {
    node.classList.add("has-advertisement");
  });
}

// src/configs.ts
var settingsConfig = {
  id: "telegram-ad-filter",
  frameStyle,
  css: popupStyle,
  title: "Telegram Ad Filter Settings",
  fields: {
    listUrls: {
      label: "Blacklist URLs (one per line) \u2013 each URL must be a publicly accessible JSON file containing an array of blocked words or phrases",
      type: "textarea",
      default: "https://raw.githubusercontent.com/VChet/telegram-ad-filter/master/blacklist.json"
    }
  }
};

// src/fetch.ts
function isValidURL(payload) {
  try {
    if (typeof payload !== "string") {
      return false;
    }
    const parsedUrl = new URL(payload);
    return parsedUrl.protocol === "http:" || parsedUrl.protocol === "https:";
  } catch {
    return false;
  }
}
function isValidJSON(payload) {
  try {
    JSON.parse(payload);
    return true;
  } catch {
    return false;
  }
}
async function fetchAndParseJSON(url) {
  const content = await fetch(url).then((response) => response.text());
  if (!isValidJSON(content)) {
    throw new SyntaxError(`Invalid JSON: data from ${url}`);
  }
  return JSON.parse(content);
}
async function fetchLists(urlsString) {
  const urls = urlsString.split("\n").map((url) => url.trim()).filter(Boolean);
  const resultSet = /* @__PURE__ */ new Set();
  for (const url of urls) {
    if (!isValidURL(url)) {
      throw new URIError(`Invalid URL: ${url}. Please ensure it leads to an online source like GitHub, Gist, Pastebin, etc.`);
    }
    try {
      const parsedData = await fetchAndParseJSON(url);
      if (!Array.isArray(parsedData)) {
        throw new TypeError(`Invalid array: data from ${url}`);
      }
      const strings = parsedData.filter((entry) => typeof entry === "string").map((entry) => entry.trim()).filter(Boolean);
      for (const string of strings) {
        resultSet.add(string);
      }
    } catch (error) {
      if (error instanceof SyntaxError) {
        throw error;
      }
      throw new Error(`Fetch error: ${url}. Please check the URL or your network connection.`);
    }
  }
  return [...resultSet];
}

// src/main.ts
(async () => {
  GM_addStyle(globalStyles);
  let adWords = [];
  const gmc = new GM_configStruct({
    ...settingsConfig,
    events: {
      init: async function() {
        adWords = await fetchLists(this.get("listUrls").toString());
      },
      save: async function() {
        try {
          adWords = await fetchLists(this.get("listUrls").toString());
          this.close();
        } catch (error) {
          alert(error instanceof Error ? error.message : String(error));
        }
      }
    }
  });
  function walk(node) {
    if (!(node instanceof HTMLElement) || !node.nodeType) {
      return;
    }
    let child = null;
    let next = null;
    switch (node.nodeType) {
      case node.ELEMENT_NODE:
      case node.DOCUMENT_NODE:
      case node.DOCUMENT_FRAGMENT_NODE:
        if (node.matches(".chat-utils")) {
          addSettingsButton(node, () => {
            gmc.open();
          });
        }
        if (node.matches(".bubble")) {
          handleMessageNode(node, adWords);
        }
        child = node.firstChild;
        while (child) {
          next = child.nextSibling;
          walk(child);
          child = next;
        }
        break;
      case node.TEXT_NODE:
      default:
        break;
    }
  }
  function mutationHandler(mutationRecords) {
    for (const { type, addedNodes } of mutationRecords) {
      if (type === "childList" && typeof addedNodes === "object" && addedNodes.length) {
        for (const node of addedNodes) {
          walk(node);
        }
      }
    }
  }
  const observer = new MutationObserver(mutationHandler);
  observer.observe(document, { childList: true, subtree: true, attributeFilter: ["class"] });
})();