background.js

// YouTube Bookmark Extension - Background Service Worker
// Listens for tab updates and communicates with content scripts

chrome.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
  // Check if the tab has a URL and it's a YouTube video page
  if (tab.url && tab.url.includes('youtube.com/watch')) {
    try {
      // Extract video ID from URL
      const url = new URL(tab.url);
      const videoId = url.searchParams.get('v');

      if (videoId) {
        // Send message to content script
        chrome.tabs.sendMessage(tabId, {
          type: 'NEW',
          videoId: videoId
        });
      }
    } catch (error) {
      console.error('Error processing YouTube URL:', error);
    }
  }
});

// Handle installation - useful for future updates
chrome.runtime.onInstalled.addListener((details) => {
  if (details.reason === 'install') {
    console.log('YouTube Bookmarks Extension installed');
  } else if (details.reason === 'update') {
    console.log('YouTube Bookmarks Extension updated');
  }
});