Chrome拡張機能を作ろう！

{
  "manifest_version": 3,
  "name": "続きボタン",
  "version": "1.0.0",
  "description": "続きボタンをクリックすると、チャット入力欄に「続き」と書き込み、送信します。",
  "content_scripts": [
    {
      "matches": ["https://chat.openai.com/*"],
      "js": ["content.js"]
    }
  ],
  "background": {
    "service_worker": "background.js"
  },
  "commands": {
    "send-continue-message": {
      "suggested_key": {
        "default": "Shift+Ctrl+E",
        "mac": "Shift+Command+E"
      },
      "description": "チャット入力欄に「続き」と書き込み、送信します。"
    }
  }
}

function sendMessage() {
  const textarea = document.querySelector('textarea[tabindex="0"]');
  if (textarea) {
    textarea.focus();
    document.execCommand('insertText', false, '続き');
    const event = new KeyboardEvent('keydown', {
      key: 'Enter',
      keyCode: 13,
      bubbles: true,
      cancelable: true,
    });
    textarea.dispatchEvent(event);
  }
}

window.addEventListener('load', () => {
  const button = document.createElement('button');
  button.innerText = '続き';
  button.style.position = 'fixed';
  button.style.bottom = '20px';
  button.style.right = '20px';
  button.style.zIndex = '9999';
  button.addEventListener('click', sendMessage);

  const body = document.body || document.documentElement;
  body.appendChild(button);
});

chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.command === 'send-message') {
    sendMessage();
    sendResponse({ message: 'メッセージを送信しました。' });
  }
});

chrome.commands.onCommand.addListener((command) => {
  if (command === 'send-continue-message') {
    chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
      chrome.tabs.sendMessage(tabs[0].id, { command: 'send-message' }, (response) => {
        console.log(response.message);
      });
    });
  }
});