adding i18n for dynamic page
This commit is contained in:
Azmat-7860
@@ -0,0 +1,43 @@
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import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:provider/provider.dart';
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import '../providers/locale_provider.dart';
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/// Lightweight runtime reader for builder-generated dynamic strings (Group-2).
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/// Generated Hybrid screens call: `DynamicStrings.of(context).tr('phone_number')`
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/// No heavy package, no ML model, no network: pure JSON maps (KBs) + Provider.
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/// Fallback chain: current lang -> English -> pretty key. Never crashes.
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///
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/// Bootstrap loads embedded assets once (see main.dart):
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/// assets/translations_dynamic/en.json, hi.json
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/// Later, portal-backend diffs merge via LocaleProvider.updateFromServer().
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class DynamicStrings {
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final LocaleProvider _provider;
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DynamicStrings._(this._provider);
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/// Listens to locale changes so Text rebuilds on language switch.
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static DynamicStrings of(BuildContext context) {
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return DynamicStrings._(Provider.of<LocaleProvider>(context));
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}
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String tr(String key) => _provider.trDynamic(key);
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/// Preload embedded asset tables. Call once before runApp finishes splash.
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static Future<Map<String, Map<String, String>>> loadEmbedded() async {
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final out = <String, Map<String, String>>{};
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for (final lang in LocaleProvider.supportedCodes) {
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try {
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final raw = await rootBundle.loadString('assets/translations_dynamic/$lang.json');
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final decoded = jsonDecode(raw) as Map<String, dynamic>;
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out[lang] = decoded.map((k, v) => MapEntry(
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k.toString().trim().toLowerCase().replaceAll(RegExp(r'\s+'), '_'),
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v.toString(),
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));
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} catch (_) {
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out[lang] = {};
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}
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}
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return out;
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}
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}
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@@ -0,0 +1,33 @@
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{
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"@@locale": "en",
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"error": "Error",
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"@error": { "description": "Dialog error title" },
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"ok": "OK",
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"@ok": { "description": "Dialog OK button" },
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"search": "Search...",
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"@search": { "description": "List search hint" },
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"confirmDeletion": "Confirm Deletion",
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"@confirmDeletion": { "description": "Delete dialog title" },
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"deleteConfirmation": "Are you sure you want to delete?",
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"@deleteConfirmation": { "description": "Delete dialog body" },
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"cancel": "Cancel",
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"@cancel": { "description": "Cancel button" },
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"delete": "Delete",
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"@delete": { "description": "Delete button" },
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"additionalFields": "Additional Fields",
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"@additionalFields": { "description": "Audit fields dialog title" },
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"close": "Close",
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"@close": { "description": "Close button" },
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"selectImageSource": "Select Image Source",
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"@selectImageSource": { "description": "Image picker title" },
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"gallery": "Gallery",
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"@gallery": { "description": "Image gallery option" },
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"camera": "Camera",
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"@camera": { "description": "Camera option" },
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"submit": "Submit",
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"@submit": { "description": "Form submit button" },
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"update": "Update",
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"@update": { "description": "Form update button" },
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"edit": "Edit",
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"@edit": { "description": "Edit action" }
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}
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@@ -0,0 +1,18 @@
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{
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"@@locale": "hi",
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"error": "त्रुटि",
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"ok": "ठीक है",
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"search": "खोजें...",
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"confirmDeletion": "हटाने की पुष्टि करें",
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"deleteConfirmation": "क्या आप वाकई हटाना चाहते हैं?",
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"cancel": "रद्द करें",
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"delete": "हटाएं",
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"additionalFields": "अतिरिक्त फ़ील्ड",
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"close": "बंद करें",
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"selectImageSource": "छवि स्रोत चुनें",
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"gallery": "गैलरी",
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"camera": "कैमरा",
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"submit": "जमा करें",
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"update": "अपडेट करें",
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"edit": "संपादित करें"
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}
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@@ -0,0 +1,223 @@
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import 'dart:async';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_localizations/flutter_localizations.dart';
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import 'package:intl/intl.dart' as intl;
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import 'app_localizations_en.dart';
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import 'app_localizations_hi.dart';
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// ignore_for_file: type=lint
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/// Callers can lookup localized strings with an instance of AppLocalizations
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/// returned by `AppLocalizations.of(context)`.
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///
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/// Applications need to include `AppLocalizations.delegate()` in their app's
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/// `localizationDelegates` list, and the locales they support in the app's
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/// `supportedLocales` list. For example:
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///
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/// ```dart
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/// import 'l10n/app_localizations.dart';
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///
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/// return MaterialApp(
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/// localizationsDelegates: AppLocalizations.localizationsDelegates,
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/// supportedLocales: AppLocalizations.supportedLocales,
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/// home: MyApplicationHome(),
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/// );
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/// ```
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///
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/// ## Update pubspec.yaml
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///
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/// Please make sure to update your pubspec.yaml to include the following
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/// packages:
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///
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/// ```yaml
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/// dependencies:
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/// # Internationalization support.
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/// flutter_localizations:
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/// sdk: flutter
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/// intl: any # Use the pinned version from flutter_localizations
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///
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/// # Rest of dependencies
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/// ```
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///
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/// ## iOS Applications
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///
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/// iOS applications define key application metadata, including supported
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/// locales, in an Info.plist file that is built into the application bundle.
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/// To configure the locales supported by your app, you’ll need to edit this
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/// file.
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///
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/// First, open your project’s ios/Runner.xcworkspace Xcode workspace file.
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/// Then, in the Project Navigator, open the Info.plist file under the Runner
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/// project’s Runner folder.
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///
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/// Next, select the Information Property List item, select Add Item from the
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/// Editor menu, then select Localizations from the pop-up menu.
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///
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/// Select and expand the newly-created Localizations item then, for each
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/// locale your application supports, add a new item and select the locale
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/// you wish to add from the pop-up menu in the Value field. This list should
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/// be consistent with the languages listed in the AppLocalizations.supportedLocales
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/// property.
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abstract class AppLocalizations {
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AppLocalizations(String locale)
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: localeName = intl.Intl.canonicalizedLocale(locale.toString());
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final String localeName;
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static AppLocalizations? of(BuildContext context) {
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return Localizations.of<AppLocalizations>(context, AppLocalizations);
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}
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static const LocalizationsDelegate<AppLocalizations> delegate =
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_AppLocalizationsDelegate();
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/// A list of this localizations delegate along with the default localizations
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/// delegates.
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///
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/// Returns a list of localizations delegates containing this delegate along with
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/// GlobalMaterialLocalizations.delegate, GlobalCupertinoLocalizations.delegate,
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/// and GlobalWidgetsLocalizations.delegate.
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///
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/// Additional delegates can be added by appending to this list in
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/// MaterialApp. This list does not have to be used at all if a custom list
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/// of delegates is preferred or required.
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static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
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<LocalizationsDelegate<dynamic>>[
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delegate,
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GlobalMaterialLocalizations.delegate,
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GlobalCupertinoLocalizations.delegate,
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GlobalWidgetsLocalizations.delegate,
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];
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/// A list of this localizations delegate's supported locales.
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static const List<Locale> supportedLocales = <Locale>[
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Locale('en'),
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Locale('hi')
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];
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/// Dialog error title
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///
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/// In en, this message translates to:
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/// **'Error'**
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String get error;
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/// Dialog OK button
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///
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/// In en, this message translates to:
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/// **'OK'**
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String get ok;
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/// List search hint
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///
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/// In en, this message translates to:
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/// **'Search...'**
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String get search;
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/// Delete dialog title
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///
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/// In en, this message translates to:
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/// **'Confirm Deletion'**
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String get confirmDeletion;
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/// Delete dialog body
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///
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/// In en, this message translates to:
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/// **'Are you sure you want to delete?'**
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String get deleteConfirmation;
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/// Cancel button
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///
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/// In en, this message translates to:
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/// **'Cancel'**
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String get cancel;
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/// Delete button
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///
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/// In en, this message translates to:
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/// **'Delete'**
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String get delete;
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/// Audit fields dialog title
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///
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/// In en, this message translates to:
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/// **'Additional Fields'**
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String get additionalFields;
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/// Close button
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///
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/// In en, this message translates to:
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/// **'Close'**
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String get close;
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/// Image picker title
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///
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/// In en, this message translates to:
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/// **'Select Image Source'**
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String get selectImageSource;
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/// Image gallery option
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///
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/// In en, this message translates to:
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/// **'Gallery'**
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String get gallery;
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/// Camera option
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///
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/// In en, this message translates to:
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/// **'Camera'**
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String get camera;
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/// Form submit button
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///
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/// In en, this message translates to:
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/// **'Submit'**
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String get submit;
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/// Form update button
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///
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/// In en, this message translates to:
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/// **'Update'**
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String get update;
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/// Edit action
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///
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/// In en, this message translates to:
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/// **'Edit'**
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String get edit;
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}
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class _AppLocalizationsDelegate
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extends LocalizationsDelegate<AppLocalizations> {
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const _AppLocalizationsDelegate();
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@override
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Future<AppLocalizations> load(Locale locale) {
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return SynchronousFuture<AppLocalizations>(lookupAppLocalizations(locale));
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}
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@override
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bool isSupported(Locale locale) =>
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<String>['en', 'hi'].contains(locale.languageCode);
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@override
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bool shouldReload(_AppLocalizationsDelegate old) => false;
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}
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AppLocalizations lookupAppLocalizations(Locale locale) {
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// Lookup logic when only language code is specified.
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switch (locale.languageCode) {
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case 'en':
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return AppLocalizationsEn();
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case 'hi':
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return AppLocalizationsHi();
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}
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throw FlutterError(
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'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
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'an issue with the localizations generation tool. Please file an issue '
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'on GitHub with a reproducible sample app and the gen-l10n configuration '
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'that was used.');
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}
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@@ -0,0 +1,55 @@
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// ignore: unused_import
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import 'package:intl/intl.dart' as intl;
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import 'app_localizations.dart';
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// ignore_for_file: type=lint
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/// The translations for English (`en`).
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class AppLocalizationsEn extends AppLocalizations {
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AppLocalizationsEn([String locale = 'en']) : super(locale);
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@override
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String get error => 'Error';
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@override
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String get ok => 'OK';
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@override
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String get search => 'Search...';
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@override
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String get confirmDeletion => 'Confirm Deletion';
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@override
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String get deleteConfirmation => 'Are you sure you want to delete?';
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@override
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String get cancel => 'Cancel';
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@override
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String get delete => 'Delete';
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@override
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String get additionalFields => 'Additional Fields';
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@override
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String get close => 'Close';
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@override
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String get selectImageSource => 'Select Image Source';
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@override
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String get gallery => 'Gallery';
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@override
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String get camera => 'Camera';
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@override
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String get submit => 'Submit';
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@override
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String get update => 'Update';
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@override
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String get edit => 'Edit';
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}
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@@ -0,0 +1,55 @@
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// ignore: unused_import
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import 'package:intl/intl.dart' as intl;
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import 'app_localizations.dart';
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// ignore_for_file: type=lint
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/// The translations for Hindi (`hi`).
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class AppLocalizationsHi extends AppLocalizations {
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AppLocalizationsHi([String locale = 'hi']) : super(locale);
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@override
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String get error => 'त्रुटि';
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@override
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String get ok => 'ठीक है';
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@override
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String get search => 'खोजें...';
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@override
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String get confirmDeletion => 'हटाने की पुष्टि करें';
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@override
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String get deleteConfirmation => 'क्या आप वाकई हटाना चाहते हैं?';
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@override
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String get cancel => 'रद्द करें';
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@override
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String get delete => 'हटाएं';
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@override
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String get additionalFields => 'अतिरिक्त फ़ील्ड';
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@override
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String get close => 'बंद करें';
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@override
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String get selectImageSource => 'छवि स्रोत चुनें';
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@override
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String get gallery => 'गैलरी';
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@override
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String get camera => 'कैमरा';
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@override
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String get submit => 'जमा करें';
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@override
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String get update => 'अपडेट करें';
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@override
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String get edit => 'संपादित करें';
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}
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+25
-1
@@ -1,10 +1,14 @@
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import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'package:sqflite/sqflite.dart';
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import 'package:sqflite_common_ffi/sqflite_ffi.dart';
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import 'package:sqlite3/sqlite3.dart';
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import 'providers/locale_provider.dart';
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import 'l10n/app_localizations.dart';
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import 'Utils/dynamic_strings.dart';
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import 'screens/Attendance/attendance_service.dart';
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import 'screens/splash_screen/splash_screen.dart';
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@@ -37,6 +41,14 @@ void main() async {
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// Background duty-tracking service (5-min GPS snapshots while punched in).
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AttendanceService.initService();
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// Group-2 i18n bootstrap: locale pref + embedded dynamic tables + server
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// diff cache (all offline-first; reverts by removing provider wiring below).
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final localeProvider = LocaleProvider();
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final embedded = await DynamicStrings.loadEmbedded();
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localeProvider.seedTables(embedded);
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await localeProvider.loadServerCache();
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await localeProvider.init();
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//Request notification permissions
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// await _requestNotificationPermissions();
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@@ -49,7 +61,12 @@ void main() async {
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// initialDelay: const Duration(seconds: 5),
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// constraints: Constraints(networkType: NetworkType.connected),
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// );
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runApp(MyApp());
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runApp(
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ChangeNotifierProvider.value(
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value: localeProvider,
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child: const MyApp(),
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),
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);
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}
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// Future<void> _requestNotificationPermissions() async {
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@@ -217,10 +234,17 @@ final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
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// }
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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@override
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Widget build(BuildContext context) {
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final locale = Provider.of<LocaleProvider>(context).locale;
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return MaterialApp(
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debugShowCheckedModeBanner: false,
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// Group-2: ARB static words. Generated Hybrid screens additionally use
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// DynamicStrings.of(context).tr(key) for wireframe fields.
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||||
locale: locale,
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||||
supportedLocales: const [Locale('en'), Locale('hi')],
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||||
localizationsDelegates: AppLocalizations.localizationsDelegates,
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||||
home: const SplashScreen(),
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||||
routes: {},
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||||
theme: ThemeData(
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||||
|
||||
@@ -0,0 +1,92 @@
|
||||
import 'package:flutter/material.dart';
|
||||
import 'package:shared_preferences/shared_preferences.dart';
|
||||
|
||||
/// Single source of truth for app language (Group-2).
|
||||
/// Drives BOTH systems together:
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||||
/// - ARB static words via MaterialApp.locale (AppLocalizations)
|
||||
/// - wireframe field words via DynamicStrings.tr(key) backed by
|
||||
/// assets/translations_dynamic/{lang}.json (free, offline, KBs).
|
||||
/// Revert: remove provider wiring in main.dart; generated screens fall back
|
||||
/// to English keys (DynamicStrings.tr returns readable fallback, never crash).
|
||||
class LocaleProvider with ChangeNotifier {
|
||||
static const _prefKey = 'app_locale_code';
|
||||
static const supportedCodes = ['en', 'hi'];
|
||||
|
||||
Locale _locale = const Locale('en');
|
||||
Locale get locale => _locale;
|
||||
String get code => _locale.languageCode;
|
||||
|
||||
/// lang -> (key -> translated value). Embedded assets loaded once at startup.
|
||||
final Map<String, Map<String, String>> _tables = {};
|
||||
|
||||
/// Server-supplied diff cache (future: portal-backend translations API).
|
||||
/// Key format: "lang::key" -> value, persisted to SharedPreferences.
|
||||
final Map<String, String> _serverDiff = {};
|
||||
|
||||
bool _ready = false;
|
||||
bool get ready => _ready;
|
||||
|
||||
Future<void> init() async {
|
||||
final prefs = await SharedPreferences.getInstance();
|
||||
final saved = prefs.getString(_prefKey);
|
||||
if (saved != null && supportedCodes.contains(saved)) {
|
||||
_locale = Locale(saved);
|
||||
}
|
||||
_ready = true;
|
||||
notifyListeners();
|
||||
}
|
||||
|
||||
/// Called once from bootstrap with preloaded asset tables.
|
||||
void seedTables(Map<String, Map<String, String>> tables) {
|
||||
_tables.addAll(tables);
|
||||
}
|
||||
|
||||
/// Merge server diff (new wireframe fields added after release).
|
||||
/// Works offline afterwards because diff is persisted.
|
||||
Future<void> updateFromServer(Map<String, String> words, String lang) async {
|
||||
if (words.isEmpty) return;
|
||||
final table = _tables.putIfAbsent(lang, () => {});
|
||||
table.addAll(words);
|
||||
for (final e in words.entries) {
|
||||
_serverDiff['$lang::${e.key}'] = e.value;
|
||||
}
|
||||
final prefs = await SharedPreferences.getInstance();
|
||||
// Persist each entry individually to survive restarts (small volume).
|
||||
for (final e in words.entries) {
|
||||
await prefs.setString('dyn_${lang}_${e.key}', e.value);
|
||||
}
|
||||
notifyListeners();
|
||||
}
|
||||
|
||||
Future<void> loadServerCache() async {
|
||||
final prefs = await SharedPreferences.getInstance();
|
||||
for (final lang in supportedCodes) {
|
||||
final table = _tables.putIfAbsent(lang, () => {});
|
||||
for (final key in prefs.getKeys().where((k) => k.startsWith('dyn_${lang}_'))) {
|
||||
final field = key.substring('dyn_${lang}_'.length);
|
||||
final v = prefs.getString(key);
|
||||
if (v != null) table[field] = v;
|
||||
}
|
||||
}
|
||||
notifyListeners();
|
||||
}
|
||||
|
||||
Future<void> setLocale(String code) async {
|
||||
if (!supportedCodes.contains(code)) return;
|
||||
_locale = Locale(code);
|
||||
final prefs = await SharedPreferences.getInstance();
|
||||
await prefs.setString(_prefKey, code);
|
||||
notifyListeners();
|
||||
}
|
||||
|
||||
/// Runtime lookup for wireframe-driven strings.
|
||||
/// Never throws: missing key -> English table -> pretty fallback.
|
||||
String trDynamic(String key) {
|
||||
final norm = key.trim().toLowerCase().replaceAll(RegExp(r'\s+'), '_');
|
||||
final cur = _tables[code]?[norm];
|
||||
if (cur != null && cur.isNotEmpty) return cur;
|
||||
final en = _tables['en']?[norm];
|
||||
if (en != null && en.isNotEmpty) return en;
|
||||
return key.replaceAll('_', ' ');
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,38 @@
|
||||
import 'package:flutter/material.dart';
|
||||
import 'package:provider/provider.dart';
|
||||
import '../providers/locale_provider.dart';
|
||||
|
||||
/// One-tap language switch driving ARB + dynamic strings together (Group-2).
|
||||
/// Drop into profile / settings / app bar:
|
||||
/// const LanguageSwitcher()
|
||||
class LanguageSwitcher extends StatelessWidget {
|
||||
final bool compact;
|
||||
const LanguageSwitcher({super.key, this.compact = false});
|
||||
|
||||
static const _labels = {'en': 'English', 'hi': 'हिन्दी'};
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
final provider = Provider.of<LocaleProvider>(context);
|
||||
if (compact) {
|
||||
return DropdownButtonHideUnderline(
|
||||
child: DropdownButton<String>(
|
||||
value: provider.code,
|
||||
items: LocaleProvider.supportedCodes
|
||||
.map((c) => DropdownMenuItem(value: c, child: Text(_labels[c] ?? c)))
|
||||
.toList(),
|
||||
onChanged: (c) {
|
||||
if (c != null) provider.setLocale(c);
|
||||
},
|
||||
),
|
||||
);
|
||||
}
|
||||
return SegmentedButton<String>(
|
||||
segments: LocaleProvider.supportedCodes
|
||||
.map((c) => ButtonSegment(value: c, label: Text(_labels[c] ?? c)))
|
||||
.toList(),
|
||||
selected: {provider.code},
|
||||
onSelectionChanged: (s) => provider.setLocale(s.first),
|
||||
);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user