Initial commit: Krow Worker App

lib/state/session_controller.dart

@@ -0,0 +1,115 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+/// Injected in `main()` once SharedPreferences has loaded.
+final prefsProvider = Provider<SharedPreferences>(
+  (ref) => throw UnimplementedError('prefsProvider must be overridden'),
+);
+
+class SessionState {
+  const SessionState({
+    this.onboardingSeen = false,
+    this.phone,
+    this.signedIn = false,
+    this.locationGranted = false,
+    this.notificationsGranted = false,
+    this.cameraGranted = false,
+  });
+
+  final bool onboardingSeen;
+  final String? phone;
+  final bool signedIn;
+  final bool locationGranted;
+  final bool notificationsGranted;
+  final bool cameraGranted;
+
+  /// The three-step permission run shown right after verification.
+  bool get permissionsDone =>
+      locationGranted && notificationsGranted && cameraGranted;
+
+  SessionState copyWith({
+    bool? onboardingSeen,
+    String? phone,
+    bool? signedIn,
+    bool? locationGranted,
+    bool? notificationsGranted,
+    bool? cameraGranted,
+  }) => SessionState(
+    onboardingSeen: onboardingSeen ?? this.onboardingSeen,
+    phone: phone ?? this.phone,
+    signedIn: signedIn ?? this.signedIn,
+    locationGranted: locationGranted ?? this.locationGranted,
+    notificationsGranted: notificationsGranted ?? this.notificationsGranted,
+    cameraGranted: cameraGranted ?? this.cameraGranted,
+  );
+}
+
+class SessionController extends Notifier<SessionState> {
+  static const _kOnboarding = 'onboarding_seen';
+  static const _kPhone = 'phone';
+  static const _kSignedIn = 'signed_in';
+  static const _kLocation = 'perm_location';
+  static const _kNotifications = 'perm_notifications';
+  static const _kCamera = 'perm_camera';
+
+  SharedPreferences get _prefs => ref.read(prefsProvider);
+
+  @override
+  SessionState build() {
+    final p = _prefs;
+    return SessionState(
+      onboardingSeen: p.getBool(_kOnboarding) ?? false,
+      phone: p.getString(_kPhone),
+      signedIn: p.getBool(_kSignedIn) ?? false,
+      locationGranted: p.getBool(_kLocation) ?? false,
+      notificationsGranted: p.getBool(_kNotifications) ?? false,
+      cameraGranted: p.getBool(_kCamera) ?? false,
+    );
+  }
+
+  void completeOnboarding() {
+    _prefs.setBool(_kOnboarding, true);
+    state = state.copyWith(onboardingSeen: true);
+  }
+
+  /// The demo backend accepts any 10-digit number and always sends `123456`.
+  static const demoCode = '123456';
+
+  String sendCode(String phone) {
+    _prefs.setString(_kPhone, phone);
+    state = state.copyWith(phone: phone);
+    return demoCode;
+  }
+
+  bool verifyCode(String code) {
+    if (code != demoCode) return false;
+    _prefs.setBool(_kSignedIn, true);
+    state = state.copyWith(signedIn: true);
+    return true;
+  }
+
+  void grantLocation() {
+    _prefs.setBool(_kLocation, true);
+    state = state.copyWith(locationGranted: true);
+  }
+
+  void grantNotifications() {
+    _prefs.setBool(_kNotifications, true);
+    state = state.copyWith(notificationsGranted: true);
+  }
+
+  void grantCamera() {
+    _prefs.setBool(_kCamera, true);
+    state = state.copyWith(cameraGranted: true);
+  }
+
+  Future<void> signOut() async {
+    await _prefs.remove(_kSignedIn);
+    await _prefs.remove(_kPhone);
+    state = state.copyWith(signedIn: false, phone: '');
+  }
+}
+
+final sessionProvider = NotifierProvider<SessionController, SessionState>(
+  SessionController.new,
+);