feat: add alot

lib/viewmodels/registration_view_model.dart

@@ -1,18 +1,23 @@
-import 'dart:convert';
-
 import 'package:flutter/foundation.dart';
-import 'package:http/http.dart' as http;
 
 import '../models/venue.dart';
+import '../services/kooltap_api_client.dart';
 import '../services/remote_sync_service.dart';
-import '../utils/app_config.dart';
 
-enum RegistrationStep { initial, loadingVenues, venuesLoaded, error, registering, registered }
+enum RegistrationStep {
+  initial,
+  loadingVenues,
+  venuesLoaded,
+  error,
+  registering,
+  registered,
+}
 
 class RegistrationViewModel extends ChangeNotifier {
+  final KoolTapApiClient apiClient;
   final RemoteSyncService syncService;
 
-  RegistrationViewModel({required this.syncService});
+  RegistrationViewModel({required this.apiClient, required this.syncService});
 
   RegistrationStep _step = RegistrationStep.initial;
   RegistrationStep get step => _step;
@@ -23,6 +28,7 @@ class RegistrationViewModel extends ChangeNotifier {
   Venue? _selectedVenue;
   Venue? get selectedVenue => _selectedVenue;
 
+  /// Server-provided, so shown as-is.
   String? _errorMessage;
   String? get errorMessage => _errorMessage;
 
@@ -37,21 +43,9 @@ class RegistrationViewModel extends ChangeNotifier {
     notifyListeners();
 
     try {
-      final response = await http
-          .get(Uri.parse('$kRemoteServerUrl/venues/'))
-          .timeout(const Duration(seconds: 15));
-
-      if (response.statusCode == 200) {
-        final List<dynamic> data = jsonDecode(response.body) as List<dynamic>;
-        _venues = data
-            .map((e) => Venue.fromJson(e as Map<String, dynamic>))
-            .toList();
-        _step = RegistrationStep.venuesLoaded;
-      } else {
-        _errorMessage = 'Failed to load venues (HTTP ${response.statusCode})';
-        _step = RegistrationStep.error;
-      }
-    } catch (e) {
+      _venues = await apiClient.getVenues();
+      _step = RegistrationStep.venuesLoaded;
+    } on Exception catch (e) {
       debugPrint('RegistrationViewModel: fetchVenues error: $e');
       _errorMessage = e.toString();
       _step = RegistrationStep.error;
@@ -72,58 +66,36 @@ class RegistrationViewModel extends ChangeNotifier {
     notifyListeners();
 
     try {
-      final response = await http
-          .post(
-            Uri.parse('$kRemoteServerUrl/devices/register'),
-            headers: {'Content-Type': 'application/json'},
-            body: jsonEncode({
-              'venueId': venue.id,
-              'name': deviceName,
-              'registrationCode': registrationCode,
-            }),
-          )
-          .timeout(const Duration(seconds: 15));
+      final credentials = await apiClient.registerDevice(
+        venueId: venue.id,
+        deviceName: deviceName,
+        registrationCode: registrationCode,
+      );
 
-      if (response.statusCode == 201) {
-        final data = jsonDecode(response.body) as Map<String, dynamic>;
-        final deviceId = data['deviceId'] as String;
-        final token = data['token'] as String;
+      await syncService.setCredentials(
+        deviceId: credentials.deviceId,
+        token: credentials.token,
+        venueId: venue.id,
+      );
 
-        await syncService.setCredentials(
-          deviceId: deviceId,
-          token: token,
-          venueId: venue.id,
-          serverUrl: kRemoteServerUrl,
-        );
-
-        _step = RegistrationStep.registered;
-        notifyListeners();
-        return true;
-      } else {
-        String message;
-        try {
-          final errorData = jsonDecode(response.body) as Map<String, dynamic>;
-          message = errorData['message'] as String? ?? 'Registration failed';
-        } catch (_) {
-          message = 'Registration failed (HTTP ${response.statusCode})';
-        }
-        _errorMessage = message;
-        _step = RegistrationStep.venuesLoaded;
-        notifyListeners();
-        return false;
-      }
-    } catch (e) {
+      _step = RegistrationStep.registered;
+      notifyListeners();
+      return true;
+    } on ApiException catch (e) {
+      _errorMessage = e.message.isEmpty
+          ? 'Registration failed (HTTP ${e.statusCode})'
+          : e.message;
+    } on Exception catch (e) {
       debugPrint('RegistrationViewModel: registerDevice error: $e');
       _errorMessage = e.toString();
-      _step = RegistrationStep.venuesLoaded;
-      notifyListeners();
-      return false;
     }
+
+    _step = RegistrationStep.venuesLoaded;
+    notifyListeners();
+    return false;
   }
 
-  Future<void> retry() async {
-    await fetchVenues();
-  }
+  Future<void> retry() => fetchVenues();
 
   void reset() {
     _step = RegistrationStep.initial;
@@ -132,4 +104,4 @@ class RegistrationViewModel extends ChangeNotifier {
     _errorMessage = null;
     notifyListeners();
   }
-}
+}