background.js

const CONTEXT_MENU_ID = "copyRepostUrl";
let isCreatingMenu = false;

function setupContextMenu() {
  if (isCreatingMenu) {
    return;
  }
  isCreatingMenu = true;
  chrome.contextMenus.removeAll(() => {
    chrome.contextMenus.create({
      id: CONTEXT_MENU_ID,
      title: chrome.i18n.getMessage("contextMenuTitle"),
      contexts: ["page", "selection", "link", "image", "video"],
      documentUrlPatterns: ["*://x.com/*", "*://twitter.com/*"]
    }, () => {
      isCreatingMenu = false;
    });
  });
}

chrome.runtime.onInstalled.addListener(setupContextMenu);
chrome.runtime.onStartup.addListener(setupContextMenu);

chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  if (message.type === "UPDATE_CONTEXT_MENU") {
    chrome.contextMenus.update(CONTEXT_MENU_ID, {
      enabled: message.enabled
    }, () => {
      if (chrome.runtime.lastError) {}
    });
  }
});

chrome.contextMenus.onClicked.addListener((info, tab) => {
  if (info.menuItemId === CONTEXT_MENU_ID && tab.id) {
    chrome.tabs.sendMessage(tab.id, { type: "COPY_REPOST_URL_REQUEST" });
  }
});