analytics.js

const GA_ENDPOINT = "https://www.google-analytics.com/mp/collect";
const MEASUREMENT_ID = `G-J5KRWGVCW3`;
const API_SECRET = `A0QPsuDfRSqMFY-WUsGrdA`;
const SESSION_EXPIRATION_IN_MIN = 30;
const DEFAULT_ENGAGEMENT_TIME_IN_MSEC = 100;

async function getOrCreateSessionId() {
  // Store session in memory storage
  let { sessionData } = await chrome.storage.session.get("sessionData");
  // Check if session exists and is still valid
  const currentTimeInMs = Date.now();
  if (sessionData && sessionData.timestamp) {
    // Calculate how long ago the session was last updated
    const durationInMin = (currentTimeInMs - sessionData.timestamp) / 60000;
    // Check if last update lays past the session expiration threshold
    if (durationInMin > SESSION_EXPIRATION_IN_MIN) {
      // Delete old session id to start a new session
      sessionData = null;
    } else {
      // Update timestamp to keep session alive
      sessionData.timestamp = currentTimeInMs;
      await chrome.storage.session.set({ sessionData });
    }
  }
  if (!sessionData) {
    // Create and store a new session
    sessionData = {
      session_id: currentTimeInMs.toString(),
      timestamp: currentTimeInMs.toString(),
    };
    await chrome.storage.session.set({ sessionData });
  }
  return sessionData.session_id;
}

async function getOrCreateClientId() {
  const result = await chrome.storage.local.get("clientId");
  let clientId = result.clientId;
  if (!clientId) {
    clientId = self.crypto.randomUUID();
    await chrome.storage.local.set({ clientId });
  }
  return clientId;
}

export async function reportEvent(eventName) {
  const result = await chrome.storage.local.get("isInternal");
  if (result.isInternal) {
    console.log(`[Internal] got event ${eventName}`);
    return;
  }
  try {
    fetch(
      `${GA_ENDPOINT}?measurement_id=${MEASUREMENT_ID}&api_secret=${API_SECRET}`,
      {
        method: "POST",
        body: JSON.stringify({
          client_id: await getOrCreateClientId(),
          events: [
            {
              name: eventName,
              params: {
                session_id: await getOrCreateSessionId(),
                engagement_time_msec: DEFAULT_ENGAGEMENT_TIME_IN_MSEC,
              },
            },
          ],
        }),
      }
    );
  } catch (error) {}
}