feat(analytics): initial Habitica-owned solution

website/server/libs/localAnalytics.js

@@ -0,0 +1,50 @@
+import nconf from 'nconf';
+import { RegistrationEventModel } from '../models/analytics/registrationEvent';
+import { SubscriptionEventModel } from '../models/analytics/subscriptionEvent';
+
+const LOCAL_ANALYTICS = !nconf.get('DISABLE_LOCAL_ANALYTICS');
+
+function getAuthenticationMethod (user) {
+  if (user.auth.google && user.auth.google.id) return 'google';
+  if (user.auth.facebook && user.auth.facebook.id) return 'facebook';
+  if (user.auth.apple && user.auth.apple.id) return 'apple';
+  return 'local';
+}
+
+export async function trackRegistrationEvent (eventData) {
+  if (!LOCAL_ANALYTICS) return null;
+
+  const { user, ipAddress, method } = eventData;
+
+  const registrationEvent = new RegistrationEventModel({
+    userId: user._id,
+    ipAddress,
+    authenticationMethod: method || getAuthenticationMethod(user),
+    platform: user.registeredThrough,
+    language: user.preferences.language,
+  });
+  return registrationEvent.save();
+}
+
+export async function trackSubscriptionEvent (eventData) {
+  if (!LOCAL_ANALYTICS) return null;
+
+  const {
+    eventType,
+    user,
+    paymentMethod,
+    customerId,
+    planId,
+    cancellationReason,
+  } = eventData;
+
+  const subscriptionEvent = new SubscriptionEventModel({
+    userId: user._id,
+    eventType,
+    paymentMethod,
+    customerId,
+    planId,
+    cancellationReason,
+  });
+  return subscriptionEvent.save();
+}