Source Code added

mobile/lib/providers/local_auth.provider.dart

@@ -0,0 +1,81 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/constants/constants.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+import 'package:immich_mobile/models/auth/biometric_status.model.dart';
+import 'package:immich_mobile/services/local_auth.service.dart';
+import 'package:immich_mobile/services/secure_storage.service.dart';
+import 'package:logging/logging.dart';
+
+final localAuthProvider = StateNotifierProvider<LocalAuthNotifier, BiometricStatus>((ref) {
+  return LocalAuthNotifier(ref.watch(localAuthServiceProvider), ref.watch(secureStorageServiceProvider));
+});
+
+class LocalAuthNotifier extends StateNotifier<BiometricStatus> {
+  final LocalAuthService _localAuthService;
+  final SecureStorageService _secureStorageService;
+
+  final _log = Logger("LocalAuthNotifier");
+
+  LocalAuthNotifier(this._localAuthService, this._secureStorageService)
+    : super(const BiometricStatus(availableBiometrics: [], canAuthenticate: false)) {
+    _localAuthService.getStatus().then((value) {
+      state = state.copyWith(canAuthenticate: value.canAuthenticate, availableBiometrics: value.availableBiometrics);
+    });
+  }
+
+  Future<bool> registerBiometric(BuildContext context, String pinCode) async {
+    final isAuthenticated = await authenticate(context, 'Authenticate to enable biometrics');
+
+    if (!isAuthenticated) {
+      return false;
+    }
+
+    await _secureStorageService.write(kSecuredPinCode, pinCode);
+
+    return true;
+  }
+
+  Future<bool> authenticate(BuildContext context, String? message) async {
+    String errorMessage = "";
+
+    try {
+      return await _localAuthService.authenticate(message);
+    } on PlatformException catch (error) {
+      switch (error.code) {
+        case "NotEnrolled":
+          _log.warning("User is not enrolled in biometrics");
+          errorMessage = "biometric_no_options".tr();
+          break;
+        case "NotAvailable":
+          _log.warning("Biometric authentication is not available");
+          errorMessage = "biometric_not_available".tr();
+          break;
+        case "LockedOut":
+          _log.warning("User is locked out of biometric authentication");
+          errorMessage = "biometric_locked_out".tr();
+          break;
+        default:
+          _log.warning("Failed to authenticate with unknown reason");
+          errorMessage = 'failed_to_authenticate'.tr();
+      }
+    } catch (error) {
+      _log.warning("Error during authentication: $error");
+      errorMessage = 'failed_to_authenticate'.tr();
+    } finally {
+      if (errorMessage.isNotEmpty) {
+        context.showSnackBar(
+          SnackBar(
+            content: Text(errorMessage, style: context.textTheme.labelLarge),
+            duration: const Duration(seconds: 3),
+            backgroundColor: context.colorScheme.errorContainer,
+          ),
+        );
+      }
+    }
+
+    return false;
+  }
+}