HomeDash/extension/chrome/background.js

// JianF Nav Sync — Chrome/Edge MV3 service worker
'use strict';

const ALARM_NAME = 'navi-sync';
const SYNC_INTERVAL_MINUTES = 0.5; // 30 seconds
const SEARCH_DOMAINS = new Set([
  'google.com', 'www.google.com', 'baidu.com', 'www.baidu.com',
  'bing.com', 'www.bing.com', 'duckduckgo.com', 'www.duckduckgo.com',
  'sogou.com', 'www.sogou.com', 'so.com', 'www.so.com',
  'yahoo.com', 'www.yahoo.com', 'ask.com', 'www.ask.com',
  'ecosia.org', 'www.ecosia.org', 'qwant.com', 'www.qwant.com',
]);

let pendingItems = [];

// Load pending from storage on startup
chrome.storage.local.get(['pending', 'serverUrl', 'syncToken'], (data) => {
  pendingItems = data.pending || [];
});

// Listen to history visits
chrome.history.onVisited.addListener((historyItem) => {
  try {
    const url = new URL(historyItem.url);
    // Skip non-http(s)
    if (url.protocol !== 'http:' && url.protocol !== 'https:') return;
    // Skip search engine URLs
    const domain = url.hostname.replace(/^www\./, '');
    if (SEARCH_DOMAINS.has(domain)) return;

    pendingItems.push({
      url: historyItem.url,
      title: historyItem.title || '',
      timestamp: historyItem.lastVisitTime / 1000, // ms -> seconds
      visit_count: historyItem.visitCount || 1,
    });
    chrome.storage.local.set({ pending: pendingItems });
  } catch (e) {
    // invalid URL, skip
  }
});

// Periodic sync alarm
chrome.alarms.create(ALARM_NAME, { periodInMinutes: SYNC_INTERVAL_MINUTES });

chrome.alarms.onAlarm.addListener((alarm) => {
  if (alarm.name !== ALARM_NAME) return;
  syncNow();
});

// Manual sync from options page
chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
  if (msg.action === 'sync') {
    syncNow().then((result) => sendResponse(result)).catch((e) => sendResponse({ error: e.message }));
    return true; // async response
  }
  if (msg.action === 'getConfig') {
    chrome.storage.local.get(['serverUrl', 'syncToken', 'deviceName'], (data) => {
      sendResponse(data);
    });
    return true;
  }
  if (msg.action === 'setConfig') {
    chrome.storage.local.set(msg.data, () => sendResponse({ ok: true }));
    return true;
  }
  if (msg.action === 'clearPending') {
    pendingItems = [];
    chrome.storage.local.set({ pending: [] }, () => sendResponse({ ok: true }));
    return true;
  }
});

function detectDevice() {
  const ua = navigator.userAgent.toLowerCase();
  if (/mobile|android|iphone|ipad/.test(ua)) {
    if (/firefox/.test(ua)) return 'mobile-firefox';
    if (/edg/.test(ua)) return 'mobile-edge';
    return 'mobile-chrome';
  }
  if (/firefox/.test(ua)) return 'desktop-firefox';
  if (/edg/.test(ua)) return 'desktop-edge';
  return 'desktop-chrome';
}

async function syncNow() {
  if (pendingItems.length === 0) return { ok: true, skipped: true, reason: 'no pending' };

  const { serverUrl, syncToken, deviceName } = await new Promise((resolve) => {
    chrome.storage.local.get(['serverUrl', 'syncToken', 'deviceName'], resolve);
  });

  if (!serverUrl) return { ok: false, reason: 'server not configured' };

  // Snapshot and clear pending
  const toSend = [...pendingItems];
  pendingItems = [];
  chrome.storage.local.set({ pending: [] });

  const body = JSON.stringify({
    items: toSend.map((item) => ({
      ...item,
      device: deviceName || detectDevice(),
    })),
  });

  try {
    const headers = { 'Content-Type': 'application/json' };
    if (syncToken) headers['Authorization'] = `Bearer ${syncToken}`;

    const resp = await fetch(`${serverUrl}/api/history/sync`, {
      method: 'POST',
      headers,
      body,
    });

    if (!resp.ok) {
      const text = await resp.text();
      // On failure, put items back
      pendingItems = [...toSend, ...pendingItems];
      chrome.storage.local.set({ pending: pendingItems });
      return { ok: false, status: resp.status, error: text };
    }

    return await resp.json();
  } catch (e) {
    // Network error — put items back
    pendingItems = [...toSend, ...pendingItems];
    chrome.storage.local.set({ pending: pendingItems });
    return { ok: false, error: e.message };
  }
}