Sicherhaven
42b71beae2
- Commit untracked posthog_service.dart (fire-and-forget HTTP client,
EU data residency, already used by auth for identify/reset)
- screen() calls: Home, Contribute, Profile, EventDetail (with event_id)
- capture('event_tapped') on hero carousel card tap (source: hero_carousel)
- capture('book_now_tapped') in _navigateToCheckout (event_id + name)
- capture('review_submitted') in _handleSubmit (event_id + rating)
- Covers all 4 expansion items from security audit finding 8.2
95 lines
2.7 KiB
Dart
95 lines
2.7 KiB
Dart
// lib/core/analytics/posthog_service.dart
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import 'dart:convert';
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import 'dart:io' show Platform;
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import 'package:flutter/foundation.dart';
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import 'package:http/http.dart' as http;
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import 'package:shared_preferences/shared_preferences.dart';
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/// Lightweight PostHog analytics client using the HTTP API.
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/// Works with Dart 2.x (no posthog_flutter SDK needed).
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class PostHogService {
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static const String _apiKey = 'phc_xXxn0COAwWRj3AU7fspsTuesCIK0aBGXb3zaIIJRgZA';
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static const String _host = 'https://eu.i.posthog.com';
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static const String _distinctIdKey = 'posthog_distinct_id';
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static PostHogService? _instance;
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String? _distinctId;
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PostHogService._();
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static PostHogService get instance {
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_instance ??= PostHogService._();
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return _instance!;
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}
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/// Initialize and load or generate a distinct ID.
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Future<void> init() async {
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final prefs = await SharedPreferences.getInstance();
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_distinctId = prefs.getString(_distinctIdKey);
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if (_distinctId == null) {
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_distinctId = DateTime.now().millisecondsSinceEpoch.toRadixString(36) +
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UniqueKey().toString().hashCode.toRadixString(36);
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await prefs.setString(_distinctIdKey, _distinctId!);
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}
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}
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/// Identify a user (call after login).
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void identify(String userId, {Map<String, dynamic>? properties}) {
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_distinctId = userId;
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SharedPreferences.getInstance().then((prefs) {
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prefs.setString(_distinctIdKey, userId);
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});
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_send('identify', {
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'distinct_id': userId,
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if (properties != null) '\$set': properties,
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});
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}
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/// Capture a custom event.
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void capture(String event, {Map<String, dynamic>? properties}) {
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_send('capture', {
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'event': event,
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'distinct_id': _distinctId ?? 'anonymous',
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'properties': {
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...?properties,
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'\$lib': 'flutter',
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'\$lib_version': '1.0.0',
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},
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});
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}
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/// Capture a screen view.
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void screen(String screenName, {Map<String, dynamic>? properties}) {
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capture('\$screen', properties: {
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'\$screen_name': screenName,
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...?properties,
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});
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}
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/// Reset identity (call on logout).
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void reset() {
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_distinctId = null;
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SharedPreferences.getInstance().then((prefs) {
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prefs.remove(_distinctIdKey);
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});
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}
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/// Send event to PostHog API (fire-and-forget).
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void _send(String endpoint, Map<String, dynamic> body) {
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final payload = {
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'api_key': _apiKey,
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'timestamp': DateTime.now().toUtc().toIso8601String(),
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...body,
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};
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// Fire and forget — don't block the UI
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http.post(
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Uri.parse('$_host/$endpoint/'),
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headers: {'Content-Type': 'application/json'},
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body: jsonEncode(payload),
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).catchError((e) {
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if (kDebugMode) debugPrint('PostHog error: $e');
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});
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}
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}
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