feat: StoreKit 2 IAP — free tier with 2 sessions and 15min message TTL

Matthias Nott

2026-04-01 98e5695f9c77c594a103e9e81128798d41bae46a

 lib/screens/settings_screen.dart
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@@ -5,6 +5,7 @@
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 import '../models/server_config.dart';
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 import '../providers/providers.dart';
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 import '../services/mqtt_service.dart' show ConnectionStatus;
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+import '../services/purchase_service.dart';
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 import '../services/wol_service.dart';
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 import '../theme/app_theme.dart';
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 import '../widgets/status_dot.dart';
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@@ -25,10 +26,12 @@
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   late final TextEditingController _macController;
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   late final TextEditingController _mqttTokenController;
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   bool _isWaking = false;
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+  bool _iapLoading = false;
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   @override
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   void initState() {
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     super.initState();
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+    PurchaseService.instance.addListener(_onPurchaseChanged);
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     final config = ref.read(serverConfigProvider);
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     _localHostController =
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         TextEditingController(text: config?.localHost ?? '');
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@@ -46,6 +49,7 @@
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   @override
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   void dispose() {
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+    PurchaseService.instance.removeListener(_onPurchaseChanged);
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     _localHostController.dispose();
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     _vpnHostController.dispose();
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     _remoteHostController.dispose();
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@@ -53,6 +57,45 @@
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     _macController.dispose();
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     _mqttTokenController.dispose();
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     super.dispose();
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+  }
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+
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+  void _onPurchaseChanged() {
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+    if (!mounted) return;
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+    final isPro = PurchaseService.instance.isPro;
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+    ref.read(isProProvider.notifier).state = isPro;
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+    setState(() => _iapLoading = PurchaseService.instance.isLoading);
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+    final error = PurchaseService.instance.errorMessage;
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+    if (error != null && mounted) {
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+      ScaffoldMessenger.of(context).showSnackBar(
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+        SnackBar(content: Text(error)),
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+      );
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+    }
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+    if (isPro && mounted) {
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+      ScaffoldMessenger.of(context).showSnackBar(
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+        const SnackBar(
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+          content: Text('PAILot Pro activated. Enjoy unlimited sessions!'),
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+          duration: Duration(seconds: 3),
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+        ),
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+      );
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+    }
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+  }
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+
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+  Future<void> _handleUpgrade() async {
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+    setState(() => _iapLoading = true);
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+    await PurchaseService.instance.purchaseFullAccess();
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+  }
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+
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+  Future<void> _handleRestore() async {
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+    setState(() => _iapLoading = true);
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+    await PurchaseService.instance.restorePurchases();
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+    if (mounted) {
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+      ScaffoldMessenger.of(context).showSnackBar(
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+        const SnackBar(
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+          content: Text('Checking for previous purchases...'),
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+          duration: Duration(seconds: 2),
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+        ),
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+      );
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+    }
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   }
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   Future<void> _save() async {
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@@ -328,6 +371,89 @@
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                 icon: const Icon(Icons.shield_outlined),
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                 label: const Text('Reset Server Trust'),
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               ),
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+              const SizedBox(height: 24),
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+
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+              // --- PAILot Pro ---
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+              const Divider(),
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+              const SizedBox(height: 8),
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+              Row(
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+                children: [
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+                  const Icon(Icons.star, size: 18),
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+                  const SizedBox(width: 8),
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+                  Text(
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+                    'PAILot Pro',
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+                    style: Theme.of(context).textTheme.titleMedium,
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+                  ),
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+                  const Spacer(),
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+                  Consumer(
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+                    builder: (ctx, ref, _) {
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+                      final isPro = ref.watch(isProProvider);
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+                      return Chip(
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+                        label: Text(
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+                          isPro ? 'Active' : 'Free Tier',
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+                          style: TextStyle(
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+                            fontSize: 11,
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+                            color: isPro ? Colors.white : null,
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+                          ),
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+                        ),
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+                        backgroundColor: isPro ? AppColors.accent : null,
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+                        padding: EdgeInsets.zero,
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+                        visualDensity: VisualDensity.compact,
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+                      );
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+                    },
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+                  ),
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+                ],
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+              ),
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+              const SizedBox(height: 4),
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+              Text(
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+                'Free: 2 sessions, messages expire after 15 min\n'
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+                'Pro: unlimited sessions, messages persist forever',
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+                style: Theme.of(context)
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+                    .textTheme
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+                    .bodySmall
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+                    ?.copyWith(color: Colors.grey.shade500),
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+              ),
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+              const SizedBox(height: 12),
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+              Consumer(
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+                builder: (ctx, ref, _) {
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+                  final isPro = ref.watch(isProProvider);
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+                  if (isPro) {
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+                    return const Center(
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+                      child: Text(
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+                        'Full access active',
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+                        style: TextStyle(color: AppColors.accent),
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+                      ),
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+                    );
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+                  }
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+                  return Column(
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+                    crossAxisAlignment: CrossAxisAlignment.stretch,
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+                    children: [
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+                      ElevatedButton.icon(
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+                        onPressed: _iapLoading ? null : _handleUpgrade,
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+                        icon: _iapLoading
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+                            ? const SizedBox(
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+                                width: 16,
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+                                height: 16,
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+                                child:
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+                                    CircularProgressIndicator(strokeWidth: 2),
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+                              )
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+                            : const Icon(Icons.upgrade),
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+                        label: const Text('Upgrade to Pro — \$4.99'),
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+                        style: ElevatedButton.styleFrom(
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+                          backgroundColor: AppColors.accent,
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+                          foregroundColor: Colors.white,
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+                        ),
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+                      ),
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+                      const SizedBox(height: 8),
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+                      OutlinedButton.icon(
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+                        onPressed: _iapLoading ? null : _handleRestore,
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+                        icon: const Icon(Icons.restore),
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+                        label: const Text('Restore Purchase'),
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+                      ),
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+                    ],
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+                  );
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+                },
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+              ),
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               const SizedBox(height: 12),
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             ],
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           ),