background.js

chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.action === 'saveBookmark') {
    chrome.storage.local.get({ bookmarks: [] }, (result) => {
      if (result.bookmarks.some(bookmark => 
        bookmark.user === request.data.user && bookmark.repo === request.data.repo)) {
        sendResponse({ already_exist: true });
        return false;
      }
      const newBookmarks = [...result.bookmarks, request.data];
      chrome.storage.local.set({ bookmarks: newBookmarks }, () => {
        sendResponse({ success: true });
      });
    });
    return true;
  }

  if (request.action === 'getBookmarks') {
    chrome.storage.local.get({ bookmarks: [] }, (result) => {
      sendResponse(result.bookmarks);
    });
    return true;
  }

  if (request.action === 'deleteBookmark') {
    chrome.storage.local.get({ bookmarks: [] }, (result) => {
      const filtered = result.bookmarks.filter(
        bookmark => bookmark.url !== request.data.url
      );
      chrome.storage.local.set({ bookmarks: filtered }, () => {
        sendResponse({ success: true });
      });
    });
    return true;
  }
});