feat: add optional amplitude tracking

src/lib/amplitude.ts

@@ -0,0 +1,34 @@
+import { APP_URL } from "./constants";
+
+// Amplitude tracking -- only runs if configured via the CLI or in the .env file
+export function logEvent(
+  eventType: string, 
+  eventProperties: Record<string, any> = {}, 
+  deviceId: string | null = null
+) {
+  if (process.env.NEXT_PUBLIC_ANALYTICS_ENABLED?.toLowerCase() !== 'true' || process.env.NODE_ENV !== "production") {
+    return;
+  }
+
+  const event = {
+    event_type: eventType,
+    api_key: '0c4fe46171b9bb8eca2ca61eb71f2e19',
+    time: Date.now(),
+    user_id: APP_URL,
+    ...(deviceId && { device_id: deviceId }),
+    ...(Object.keys(eventProperties).length && { event_properties: eventProperties })
+  };
+
+  fetch('https://api2.amplitude.com/2/httpapi', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({
+      api_key: '0c4fe46171b9bb8eca2ca61eb71f2e19',
+      events: [event]
+    })
+  }).catch(error => {
+    console.error('Amplitude tracking error:', error);
+  });
+}