Twitter insta block

main.js

// ==UserScript==
// @name         Twitter Insta Block
// @namespace    your-namespace-here
// @version      3
// @description  Adds a "Block User" button on Twitter timeline conversations and blocks the user with one click
// @author       zoubingwu
// @match        https://twitter.com/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  let authorization = '';

  // Save a reference to the original XMLHttpRequest constructor
  const OriginalXHR = window.XMLHttpRequest;

  // Define a new constructor for our modified XMLHttpRequest object
  function ModifiedXHR() {
    const xhr = new OriginalXHR();

    // Override the setRequestHeader() method to intercept the Authorization header
    const originalSetRequestHeader = xhr.setRequestHeader;
    xhr.setRequestHeader = function (name, value) {
      if (name.toLowerCase() === 'authorization' && !authorization) {
        authorization = value;
      }
      originalSetRequestHeader.apply(this, arguments);
    }

    return xhr;
  }

  // Replace the original XMLHttpRequest constructor with our modified constructor
  window.XMLHttpRequest = ModifiedXHR;

  const regex = /^https:\/\/twitter\.com\/\w+\/status\/(\d+)/;
  const style = document.createElement("style");
  style.innerHTML = `
    .insta-block-button {
      margin-right: 10px;
      height: 36px;
      width: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition-duration: 0.2s;
    }
    .insta-block-button:hover {
      background-color: rgba(29, 155, 240, 0.1)
    }
    .insta-block-button > svg {
      height: 16px;
      color: ${reverseColor(document.body.style.backgroundColor)};
      fill: currentColor;
    }
  `
  document.body.appendChild(style);

  const tampered = new WeakSet();
  const observer = new MutationObserver(function (mutationList, observer) {
    if (!regex.test(window.location.href)) {
      return;
    }

    const conversationItems = document.querySelectorAll('[data-testid="cellInnerDiv"]')

    // For each conversation item, add a "Block User" button
    conversationItems.forEach((item, index) => {
      if (index === 0) {
        return;
      }

      if (tampered.has(item)) {
        return;
      }

      const tweet = item.querySelector('[data-testid="tweet"]')

      // already blocked
      if (!tweet && ['已屏蔽的账号', 'account you blocked'].some(i => item.innerText.includes(i))) {
        item.style.display = 'none'
        return;
      }


      const link = item.querySelector('[data-testid="User-Name"] a[role="link"]')
      if (!link) {
        return;
      }
      const screenName = link.getAttribute('href').substring(1);

      if (item.querySelector(`.insta-block-button[data-name="${screenName}"]`)) {
        return;
      }

      // Create a "Block User" button
      const blockButton = document.createElement('div');
      blockButton.innerHTML = `<svg viewBox="0 0 24 24" aria-hidden="true"><g><path d="M12 3.75c-4.55 0-8.25 3.69-8.25 8.25 0 1.92.66 3.68 1.75 5.08L17.09 5.5C15.68 4.4 13.92 3.75 12 3.75zm6.5 3.17L6.92 18.5c1.4 1.1 3.16 1.75 5.08 1.75 4.56 0 8.25-3.69 8.25-8.25 0-1.92-.65-3.68-1.75-5.08zM1.75 12C1.75 6.34 6.34 1.75 12 1.75S22.25 6.34 22.25 12 17.66 22.25 12 22.25 1.75 17.66 1.75 12z"></path></g></svg>`

      blockButton.dataset.name = screenName;
      blockButton.classList.add('insta-block-button')

      // Add a click event listener to the button to block the user
      blockButton.addEventListener('click', (e) => {
        e.preventDefault();
        e.stopPropagation();

        item.remove();
        blockUser(screenName)
      });

      // Add the "Block User" button to the conversation item
      const menu = item.querySelector('div[data-testid="caret"]');
      if (menu) {
        menu.parentNode.prepend(blockButton);
        tampered.add(item);
      }
    });
  })

  observer.observe(document.documentElement, { childList: true, subtree: true });

  function getCookie(name) {
    const cookieString = document.cookie;
    const cookies = cookieString.split(';');

    const cookieMap = cookies.reduce((map, cookie) => {
      const [key, value] = cookie.trim().split('=');
      map[key] = value;
      return map;
    }, {});

    return cookieMap[name];
  }

  function getHeader() {
    const authHeaders = JSON.parse(localStorage.getItem('authHeaders'));
    const headers = {
      'Authorization': authHeaders ? Object.values(authHeaders).at(0).authorization : authorization,
      'x-csrf-token': getCookie('ct0'),
      'x-twitter-auth-type': 'OAuth2Session',
      'x-twitter-active-user': 'yes',
      'x-twitter-client-language': 'en',
    }

    return headers;
  }

  // Define a function to block a user by screen name
  function blockUser(screenName) {
    fetch(`https://twitter.com/i/api/1.1/blocks/create.json?screen_name=${screenName}`, {
      method: 'POST',
      credentials: 'include',
      headers: getHeader(),
    })
      .then(response => {
        if (response.ok) {
          console.log(`User @${screenName} blocked successfully`);
        } else {
          console.error(`Failed to block user @${screenName}`);
        }
      })
      .catch(error => {
        console.error(error);
      });
  }

  function reverseColor(color) {
    // Check if the input is a hex color code
    if (color.startsWith('#')) {
      // Convert hex color code to RGB color values
      const r = parseInt(color.substring(1, 3), 16);
      const g = parseInt(color.substring(3, 5), 16);
      const b = parseInt(color.substring(5, 7), 16);

      // Compute the reverse color values by subtracting each component from 255
      const reverseR = 255 - r;
      const reverseG = 255 - g;
      const reverseB = 255 - b;

      // Convert reverse RGB color values to hex color code
      const reverseHex = `#${reverseR.toString(16).padStart(2, '0')}${reverseG.toString(16).padStart(2, '0')}${reverseB.toString(16).padStart(2, '0')}`;

      return reverseHex;
    } else if (color.startsWith('rgb')) {
      // Parse the RGB color values from the input string
      const match = color.match(/\d+/g);
      const r = parseInt(match[0]);
      const g = parseInt(match[1]);
      const b = parseInt(match[2]);

      // Compute the reverse color values by subtracting each component from 255
      const reverseR = 255 - r;
      const reverseG = 255 - g;
      const reverseB = 255 - b;

      // Construct the reverse RGB color string
      const reverseRGB = `rgb(${reverseR}, ${reverseG}, ${reverseB})`;

      return reverseRGB;
    } else {
      // Invalid input
      return null;
    }
  }
})();

Add the following code to L96 to display a white icon when the website is in dark mode

@media (prefers-color-scheme: dark) {
  .insta-block-button {
    color: white
  }
}

Add the following code to L96 to display a white icon when the website is in dark mode

@media (prefers-color-scheme: dark) {
  .insta-block-button {
    color: white
  }
}

Looks like twitter not following the system color scheme setting, instead it uses its own background color setting, so I added a function to simply reverse that color for the icon

Firefox's querySelector does not support the pseduo-class :has() well enough like Chrome does.

BTW, the twitter auth token cannot be found in localStorage when using Firefox so I have to find it manually.

Here is my forked snippet with Firefox support.

https://gist.github.com/tizee/495e3411d6311c12ea3c06c4bf3c0bcf#file-main-js

This would make the script more robust.

has selector was removed, it just get all the querySelectorAll('[data-testid="cellInnerDiv"]') then remove that item in the click event

Firefox's querySelector does not support the pseduo-class :has() well enough like Chrome does.

BTW, the twitter auth token cannot be found in localStorage when using Firefox so I have to find it manually.

Here is my forked snippet with Firefox support.

tizee/495e3411d6311c12ea3c06c4bf3c0bcf#file-main-js

This would make the script more robust.

tried with firefox, seems twitter no longer stores auth token in local storage, so I have to monkey patch the XHR :(

tried with firefox, seems twitter no longer stores auth token in local storage, so I have to monkey patch the XHR :(

Thanks for solving the token issue. This hack is very creative.