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Minimal ChatGPT Message Logger + Injector + Submitter

Listen for postMessage from parent, log to console, enter it into the chat input, and submit

// ==UserScript==
// @name         Minimal ChatGPT Message Logger + Injector + Submitter
// @description  Listen for postMessage from parent, log to console, enter it into the chat input, and submit
// @match        https://chatgpt.com/*
// @version 0.0.1.20250526031750
// @namespace https://greasyfork.org/users/1435046
// ==/UserScript==

(function () {
  'use strict';

  window.addEventListener('message', function (event) {

    // Handle search button clicks
    if (event.data && event.data.type === 'searchButtonClicked') {
      const searchBtn1 = document.querySelector('[data-testid="composer-button-search"]');

      const searchButton2 = document.getElementById('system-hint-button');

      if (searchBtn1) {
        searchBtn1.click();
        console.log
        return;
      }

      if (searchButton2) {
        searchButton2.focus(); // Sometimes needed to simulate a real user
        searchButton2.dispatchEvent(new PointerEvent('pointerdown', { bubbles: true }));

        for (const div of document.querySelectorAll('[id^="radix-"] > div > div')) {
          if (div.textContent.trim() === 'Search the web') {
            div.click();
            break;
          }
        }

      };
      return;
    }

    if (event.data && event.data.type === 'reasonButtonClicked') {
      const reasonBtn1 = document.querySelector('[data-testid="composer-button-reason"]');

      const reasonButton2 = document.getElementById('system-hint-button');

      if (reasonBtn1) reasonBtn1.click();

      if (reasonButton2) {
        reasonButton2.focus(); // Sometimes needed to simulate a real user
        reasonButton2.dispatchEvent(new PointerEvent('pointerdown', { bubbles: true }));

        for (const div of document.querySelectorAll('[id^="radix-"] > div > div')) {
          if (div.textContent.trim() === 'Think for longer') {
            div.click();
            break;
          }
        }

      }
      return;
    }

    if (event.data && event.data.type === 'newChatButtonClicked') {
      // Click the "New chat" anchor link
      const newChatLink = document.querySelector('a[aria-label="New chat"][href="/"]');
      if (newChatLink) newChatLink.click();
      return;
    }

    if (event.data.type !== 'prompt') return;

    // Locate ProseMirror composer
    const composer = document.querySelector('.ProseMirror');
    if (!composer) return;

    console.log('Injecting message:', event.data.content);

    // Focus and inject the text
    composer.focus();

    const lines = event.data.content.split('\n');
    const html = lines
      .map(line => `<p>${line
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')}</p>`)
      .join('');
    composer.innerHTML = html;

    composer.dispatchEvent(new InputEvent('input', { bubbles: true }));

    // Observe DOM changes until the send button is enabled
    const observer = new MutationObserver(function (mutations, obs) {
      const sendBtn = document.querySelector('[data-testid="send-button"]');
      if (sendBtn && !sendBtn.disabled) {
        obs.disconnect();
        console.log('Submitting message');
        sendBtn.click();
      }
    });

    observer.observe(document, {
      childList: true,
      subtree: true,
      attributes: true,
      attributeFilter: ['disabled']
    });
  });
})();