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reading test receipt text detected OK

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davmar
2026-08-28 19:14:38 +02:00
parent 0311b8955a
commit 2d8fc46a30
31 changed files with 356 additions and 2289 deletions
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lib/services/fake_item_data.dart
-97
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@@ -1,97 +0,0 @@
/// In-memory sample catalog used when the app is offline or in mock mode.
library;
import '../models/item.dart';
/// Static starter data so the UI is useful without a network.
abstract final class FakeItemData {
static final List<Item> items = [
Item(
id: 'local-1',
title: 'Material 3 surfaces',
subtitle: 'Use tonal layers instead of heavy drop shadows.',
description:
'Material 3 prefers surface tints and short, soft shadows. Keep cards '
'on surfaceContainerLow, bump the hero to surfaceContainerHighest, and '
'reserve elevation for sheets and dialogs.',
category: ItemCategory.design,
createdAt: DateTime(2026, 4, 12),
),
Item(
id: 'local-2',
title: 'Provider at the root',
subtitle: 'Lift shared state above the widget that consumes it.',
description:
'Wrap MaterialApp with MultiProvider so ThemeController and '
'ItemController survive route changes. Keep UI widgets dumb: they '
'read context.watch and call controller methods.',
category: ItemCategory.development,
createdAt: DateTime(2026, 5, 3),
),
Item(
id: 'local-3',
title: 'Focus on one task',
subtitle: 'A short list beats an overflowing dashboard.',
description:
'The home screen shows a greeting, a compact stat strip, and a '
'ListView.builder of items. Extra tools live one tap away on Search, '
'Profile, and Settings.',
category: ItemCategory.productivity,
createdAt: DateTime(2026, 6, 18),
),
Item(
id: 'local-4',
title: 'Breathable spacing',
subtitle: '16–24px padding and 12px gaps keep cards from crowding.',
description:
'On compact phones use 16px page padding. From 600px up, step to 24px '
'and cap the content width so lines stay readable on tablets.',
category: ItemCategory.lifestyle,
createdAt: DateTime(2026, 7, 1),
),
Item(
id: 'local-5',
title: 'Hero transitions',
subtitle: 'Match a tag on the list tile and the detail header.',
description:
'Wrap the leading glyph in a Hero with a stable tag derived from the '
'item id. The detail screen reuses the same widget so Flutter can '
'animate size and position.',
category: ItemCategory.design,
createdAt: DateTime(2026, 7, 22),
),
Item(
id: 'local-6',
title: 'Mock first, HTTP later',
subtitle: 'A repository hides whether data is fake or remote.',
description:
'ItemRepository serves FakeItemData by default and can switch to '
'ItemApi (http + JSONPlaceholder) from Settings. Failures fall back '
'to the mock list so the UI never goes empty on a demo device.',
category: ItemCategory.development,
createdAt: DateTime(2026, 8, 4),
),
Item(
id: 'local-7',
title: 'Capture ideas quickly',
subtitle: 'The add-item form validates before it writes.',
description:
'Title, summary, and description each have a length rule. Category is '
'a required dropdown. On success the new item is inserted at the top '
'of ItemController so Home and Search update immediately.',
category: ItemCategory.productivity,
createdAt: DateTime(2026, 8, 15),
),
Item(
id: 'local-8',
title: 'Light and dark equally',
subtitle: 'Seeded ColorSchemes keep contrast in both modes.',
description:
'ThemeController persists ThemeMode in shared_preferences. The '
'settings screen offers System, Light, and Dark. Both schemes come '
'from the same teal seed color.',
category: ItemCategory.lifestyle,
createdAt: DateTime(2026, 8, 20),
),
];
}
lib/services/item_api.dart
-61
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/// HTTP client placeholder that talks to a public sample API.
library;
import 'dart:convert';
import 'package:http/http.dart' as http;
import '../models/item.dart';
/// Fetches catalog items from JSONPlaceholder.
///
/// This is intentionally a thin, replaceable client. Swap [baseUrl] and
/// [Item.fromJson] when you point the app at a real backend.
class ItemApi {
ItemApi({http.Client? client, this.baseUrl = defaultBaseUrl})
: _client = client ?? http.Client();
static const defaultBaseUrl = 'https://jsonplaceholder.typicode.com';
final http.Client _client;
final String baseUrl;
/// GET `/posts` and map each record to an [Item].
Future<List<Item>> fetchItems({int limit = 12}) async {
final uri = Uri.parse('$baseUrl/posts');
final response = await _client.get(
uri,
headers: const {'Accept': 'application/json'},
);
if (response.statusCode < 200 || response.statusCode >= 300) {
throw ItemApiException(
'Request failed (${response.statusCode})',
statusCode: response.statusCode,
);
}
final decoded = jsonDecode(response.body);
if (decoded is! List) {
throw const ItemApiException('Unexpected response shape');
}
return decoded
.whereType<Map<String, dynamic>>()
.take(limit)
.map(Item.fromJson)
.toList(growable: false);
}
void close() => _client.close();
}
class ItemApiException implements Exception {
const ItemApiException(this.message, {this.statusCode});
final String message;
final int? statusCode;
@override
String toString() => message;
}
lib/services/item_repository.dart
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/// Chooses between mock data and the HTTP client, then returns [Item] lists.
library;
import '../models/item.dart';
import 'fake_item_data.dart';
import 'item_api.dart';
/// Single entry point for catalog data. UI code should depend on this type,
/// not on [ItemApi] or [FakeItemData] directly.
class ItemRepository {
ItemRepository({
ItemApi? api,
this.useRemoteData = false,
}) : _api = api ?? ItemApi();
final ItemApi _api;
/// When true, [fetchItems] hits the network; otherwise it returns local fakes.
bool useRemoteData;
Future<List<Item>> fetchItems() async {
if (!useRemoteData) {
return List<Item>.from(FakeItemData.items);
}
try {
return await _api.fetchItems();
} catch (_) {
// Keep the demo usable if the device is offline or the API fails.
return List<Item>.from(FakeItemData.items);
}
}
/// Builds a locally-created item (no network round-trip).
Item createLocal({
required String title,
required String subtitle,
required String description,
required ItemCategory category,
}) {
return Item(
id: 'local-${DateTime.now().microsecondsSinceEpoch}',
title: title.trim(),
subtitle: subtitle.trim(),
description: description.trim(),
category: category,
createdAt: DateTime.now(),
);
}
}
lib/services/storage_service.dart
-38
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/// Thin wrapper around [SharedPreferences] for local key-value persistence.
library;
import 'package:shared_preferences/shared_preferences.dart';
import '../utils/constants.dart';
/// Loads and stores user preferences. Call [init] once at startup.
class StorageService {
StorageService({this._preferences});
SharedPreferences? _preferences;
Future<void> init() async {
_preferences ??= await SharedPreferences.getInstance();
}
SharedPreferences get _prefs {
final prefs = _preferences;
if (prefs == null) {
throw StateError('StorageService.init() must be called before use.');
}
return prefs;
}
String get themeModeName =>
_prefs.getString(StorageKeys.themeMode) ?? 'system';
Future<void> setThemeModeName(String value) {
return _prefs.setString(StorageKeys.themeMode, value);
}
bool get useRemoteData => _prefs.getBool(StorageKeys.useRemoteData) ?? false;
Future<void> setUseRemoteData(bool value) {
return _prefs.setBool(StorageKeys.useRemoteData, value);
}
}