adding i18n for dynamic page

This commit is contained in:
Azmat-7860
2026-10-02 22:03:21 +05:30
parent 63ecc3e7e6
commit 2527b957aa
23 changed files with 3053 additions and 2 deletions
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# Default ignored files
/shelf/
/workspace.xml
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<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$" />
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="DeviceTable">
<option name="columnSorters">
<list>
<ColumnSorterState>
<option name="column" value="Name" />
<option name="order" value="ASCENDING" />
</ColumnSorterState>
</list>
</option>
</component>
</project>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="MarkdownSettings">
<option name="previewPanelProviderInfo">
<ProviderInfo name="Compose (experimental)" className="com.intellij.markdown.compose.preview.ComposePanelProvider" />
</option>
</component>
</project>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager" version="2">
<output url="file://$PROJECT_DIR$/out" />
</component>
</project>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/.idea/authsec_flutter.iml" filepath="$PROJECT_DIR$/.idea/authsec_flutter.iml" />
</modules>
</component>
</project>
Generated
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="" vcs="Git" />
</component>
</project>
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{
"student": "Student",
"create_student": "Create Student",
"update_student": "Update Student",
"name": "Name",
"phone_number": "Phone Number",
"email": "Email"
}
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{
"student": "छात्र",
"create_student": "छात्र बनाएं",
"update_student": "छात्र अपडेट करें",
"name": "नाम",
"phone_number": "फोन नंबर",
"email": "ईमेल"
}
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arb-dir: lib/l10n
template-arb-file: app_en.arb
output-localization-file: app_localizations.dart
# Checked-in output in lib/l10n (Flutter 3.47+ always generates
# non-synthetic files): deterministic for portal generated apps,
# Docker Linux builds and CI without extra gen steps.
output-dir: lib/l10n
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import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import '../providers/locale_provider.dart';
/// Lightweight runtime reader for builder-generated dynamic strings (Group-2).
/// Generated Hybrid screens call: `DynamicStrings.of(context).tr('phone_number')`
/// No heavy package, no ML model, no network: pure JSON maps (KBs) + Provider.
/// Fallback chain: current lang -> English -> pretty key. Never crashes.
///
/// Bootstrap loads embedded assets once (see main.dart):
/// assets/translations_dynamic/en.json, hi.json
/// Later, portal-backend diffs merge via LocaleProvider.updateFromServer().
class DynamicStrings {
final LocaleProvider _provider;
DynamicStrings._(this._provider);
/// Listens to locale changes so Text rebuilds on language switch.
static DynamicStrings of(BuildContext context) {
return DynamicStrings._(Provider.of<LocaleProvider>(context));
}
String tr(String key) => _provider.trDynamic(key);
/// Preload embedded asset tables. Call once before runApp finishes splash.
static Future<Map<String, Map<String, String>>> loadEmbedded() async {
final out = <String, Map<String, String>>{};
for (final lang in LocaleProvider.supportedCodes) {
try {
final raw = await rootBundle.loadString('assets/translations_dynamic/$lang.json');
final decoded = jsonDecode(raw) as Map<String, dynamic>;
out[lang] = decoded.map((k, v) => MapEntry(
k.toString().trim().toLowerCase().replaceAll(RegExp(r'\s+'), '_'),
v.toString(),
));
} catch (_) {
out[lang] = {};
}
}
return out;
}
}
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{
"@@locale": "en",
"error": "Error",
"@error": { "description": "Dialog error title" },
"ok": "OK",
"@ok": { "description": "Dialog OK button" },
"search": "Search...",
"@search": { "description": "List search hint" },
"confirmDeletion": "Confirm Deletion",
"@confirmDeletion": { "description": "Delete dialog title" },
"deleteConfirmation": "Are you sure you want to delete?",
"@deleteConfirmation": { "description": "Delete dialog body" },
"cancel": "Cancel",
"@cancel": { "description": "Cancel button" },
"delete": "Delete",
"@delete": { "description": "Delete button" },
"additionalFields": "Additional Fields",
"@additionalFields": { "description": "Audit fields dialog title" },
"close": "Close",
"@close": { "description": "Close button" },
"selectImageSource": "Select Image Source",
"@selectImageSource": { "description": "Image picker title" },
"gallery": "Gallery",
"@gallery": { "description": "Image gallery option" },
"camera": "Camera",
"@camera": { "description": "Camera option" },
"submit": "Submit",
"@submit": { "description": "Form submit button" },
"update": "Update",
"@update": { "description": "Form update button" },
"edit": "Edit",
"@edit": { "description": "Edit action" }
}
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{
"@@locale": "hi",
"error": "त्रुटि",
"ok": "ठीक है",
"search": "खोजें...",
"confirmDeletion": "हटाने की पुष्टि करें",
"deleteConfirmation": "क्या आप वाकई हटाना चाहते हैं?",
"cancel": "रद्द करें",
"delete": "हटाएं",
"additionalFields": "अतिरिक्त फ़ील्ड",
"close": "बंद करें",
"selectImageSource": "छवि स्रोत चुनें",
"gallery": "गैलरी",
"camera": "कैमरा",
"submit": "जमा करें",
"update": "अपडेट करें",
"edit": "संपादित करें"
}
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import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:intl/intl.dart' as intl;
import 'app_localizations_en.dart';
import 'app_localizations_hi.dart';
// ignore_for_file: type=lint
/// Callers can lookup localized strings with an instance of AppLocalizations
/// returned by `AppLocalizations.of(context)`.
///
/// Applications need to include `AppLocalizations.delegate()` in their app's
/// `localizationDelegates` list, and the locales they support in the app's
/// `supportedLocales` list. For example:
///
/// ```dart
/// import 'l10n/app_localizations.dart';
///
/// return MaterialApp(
/// localizationsDelegates: AppLocalizations.localizationsDelegates,
/// supportedLocales: AppLocalizations.supportedLocales,
/// home: MyApplicationHome(),
/// );
/// ```
///
/// ## Update pubspec.yaml
///
/// Please make sure to update your pubspec.yaml to include the following
/// packages:
///
/// ```yaml
/// dependencies:
/// # Internationalization support.
/// flutter_localizations:
/// sdk: flutter
/// intl: any # Use the pinned version from flutter_localizations
///
/// # Rest of dependencies
/// ```
///
/// ## iOS Applications
///
/// iOS applications define key application metadata, including supported
/// locales, in an Info.plist file that is built into the application bundle.
/// To configure the locales supported by your app, you’ll need to edit this
/// file.
///
/// First, open your project’s ios/Runner.xcworkspace Xcode workspace file.
/// Then, in the Project Navigator, open the Info.plist file under the Runner
/// project’s Runner folder.
///
/// Next, select the Information Property List item, select Add Item from the
/// Editor menu, then select Localizations from the pop-up menu.
///
/// Select and expand the newly-created Localizations item then, for each
/// locale your application supports, add a new item and select the locale
/// you wish to add from the pop-up menu in the Value field. This list should
/// be consistent with the languages listed in the AppLocalizations.supportedLocales
/// property.
abstract class AppLocalizations {
AppLocalizations(String locale)
: localeName = intl.Intl.canonicalizedLocale(locale.toString());
final String localeName;
static AppLocalizations? of(BuildContext context) {
return Localizations.of<AppLocalizations>(context, AppLocalizations);
}
static const LocalizationsDelegate<AppLocalizations> delegate =
_AppLocalizationsDelegate();
/// A list of this localizations delegate along with the default localizations
/// delegates.
///
/// Returns a list of localizations delegates containing this delegate along with
/// GlobalMaterialLocalizations.delegate, GlobalCupertinoLocalizations.delegate,
/// and GlobalWidgetsLocalizations.delegate.
///
/// Additional delegates can be added by appending to this list in
/// MaterialApp. This list does not have to be used at all if a custom list
/// of delegates is preferred or required.
static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
<LocalizationsDelegate<dynamic>>[
delegate,
GlobalMaterialLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
];
/// A list of this localizations delegate's supported locales.
static const List<Locale> supportedLocales = <Locale>[
Locale('en'),
Locale('hi')
];
/// Dialog error title
///
/// In en, this message translates to:
/// **'Error'**
String get error;
/// Dialog OK button
///
/// In en, this message translates to:
/// **'OK'**
String get ok;
/// List search hint
///
/// In en, this message translates to:
/// **'Search...'**
String get search;
/// Delete dialog title
///
/// In en, this message translates to:
/// **'Confirm Deletion'**
String get confirmDeletion;
/// Delete dialog body
///
/// In en, this message translates to:
/// **'Are you sure you want to delete?'**
String get deleteConfirmation;
/// Cancel button
///
/// In en, this message translates to:
/// **'Cancel'**
String get cancel;
/// Delete button
///
/// In en, this message translates to:
/// **'Delete'**
String get delete;
/// Audit fields dialog title
///
/// In en, this message translates to:
/// **'Additional Fields'**
String get additionalFields;
/// Close button
///
/// In en, this message translates to:
/// **'Close'**
String get close;
/// Image picker title
///
/// In en, this message translates to:
/// **'Select Image Source'**
String get selectImageSource;
/// Image gallery option
///
/// In en, this message translates to:
/// **'Gallery'**
String get gallery;
/// Camera option
///
/// In en, this message translates to:
/// **'Camera'**
String get camera;
/// Form submit button
///
/// In en, this message translates to:
/// **'Submit'**
String get submit;
/// Form update button
///
/// In en, this message translates to:
/// **'Update'**
String get update;
/// Edit action
///
/// In en, this message translates to:
/// **'Edit'**
String get edit;
}
class _AppLocalizationsDelegate
extends LocalizationsDelegate<AppLocalizations> {
const _AppLocalizationsDelegate();
@override
Future<AppLocalizations> load(Locale locale) {
return SynchronousFuture<AppLocalizations>(lookupAppLocalizations(locale));
}
@override
bool isSupported(Locale locale) =>
<String>['en', 'hi'].contains(locale.languageCode);
@override
bool shouldReload(_AppLocalizationsDelegate old) => false;
}
AppLocalizations lookupAppLocalizations(Locale locale) {
// Lookup logic when only language code is specified.
switch (locale.languageCode) {
case 'en':
return AppLocalizationsEn();
case 'hi':
return AppLocalizationsHi();
}
throw FlutterError(
'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
'an issue with the localizations generation tool. Please file an issue '
'on GitHub with a reproducible sample app and the gen-l10n configuration '
'that was used.');
}
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// ignore: unused_import
import 'package:intl/intl.dart' as intl;
import 'app_localizations.dart';
// ignore_for_file: type=lint
/// The translations for English (`en`).
class AppLocalizationsEn extends AppLocalizations {
AppLocalizationsEn([String locale = 'en']) : super(locale);
@override
String get error => 'Error';
@override
String get ok => 'OK';
@override
String get search => 'Search...';
@override
String get confirmDeletion => 'Confirm Deletion';
@override
String get deleteConfirmation => 'Are you sure you want to delete?';
@override
String get cancel => 'Cancel';
@override
String get delete => 'Delete';
@override
String get additionalFields => 'Additional Fields';
@override
String get close => 'Close';
@override
String get selectImageSource => 'Select Image Source';
@override
String get gallery => 'Gallery';
@override
String get camera => 'Camera';
@override
String get submit => 'Submit';
@override
String get update => 'Update';
@override
String get edit => 'Edit';
}
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// ignore: unused_import
import 'package:intl/intl.dart' as intl;
import 'app_localizations.dart';
// ignore_for_file: type=lint
/// The translations for Hindi (`hi`).
class AppLocalizationsHi extends AppLocalizations {
AppLocalizationsHi([String locale = 'hi']) : super(locale);
@override
String get error => 'त्रुटि';
@override
String get ok => 'ठीक है';
@override
String get search => 'खोजें...';
@override
String get confirmDeletion => 'हटाने की पुष्टि करें';
@override
String get deleteConfirmation => 'क्या आप वाकई हटाना चाहते हैं?';
@override
String get cancel => 'रद्द करें';
@override
String get delete => 'हटाएं';
@override
String get additionalFields => 'अतिरिक्त फ़ील्ड';
@override
String get close => 'बंद करें';
@override
String get selectImageSource => 'छवि स्रोत चुनें';
@override
String get gallery => 'गैलरी';
@override
String get camera => 'कैमरा';
@override
String get submit => 'जमा करें';
@override
String get update => 'अपडेट करें';
@override
String get edit => 'संपादित करें';
}
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import 'dart:io';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:sqflite/sqflite.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import 'package:sqlite3/sqlite3.dart';
import 'providers/locale_provider.dart';
import 'l10n/app_localizations.dart';
import 'Utils/dynamic_strings.dart';
import 'screens/Attendance/attendance_service.dart';
import 'screens/splash_screen/splash_screen.dart';
@@ -37,6 +41,14 @@ void main() async {
// Background duty-tracking service (5-min GPS snapshots while punched in).
AttendanceService.initService();
// Group-2 i18n bootstrap: locale pref + embedded dynamic tables + server
// diff cache (all offline-first; reverts by removing provider wiring below).
final localeProvider = LocaleProvider();
final embedded = await DynamicStrings.loadEmbedded();
localeProvider.seedTables(embedded);
await localeProvider.loadServerCache();
await localeProvider.init();
//Request notification permissions
// await _requestNotificationPermissions();
@@ -49,7 +61,12 @@ void main() async {
// initialDelay: const Duration(seconds: 5),
// constraints: Constraints(networkType: NetworkType.connected),
// );
runApp(MyApp());
runApp(
ChangeNotifierProvider.value(
value: localeProvider,
child: const MyApp(),
),
);
}
// Future<void> _requestNotificationPermissions() async {
@@ -217,10 +234,17 @@ final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
// }
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
final locale = Provider.of<LocaleProvider>(context).locale;
return MaterialApp(
debugShowCheckedModeBanner: false,
// Group-2: ARB static words. Generated Hybrid screens additionally use
// DynamicStrings.of(context).tr(key) for wireframe fields.
locale: locale,
supportedLocales: const [Locale('en'), Locale('hi')],
localizationsDelegates: AppLocalizations.localizationsDelegates,
home: const SplashScreen(),
routes: {},
theme: ThemeData(
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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:
/// - 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('_', ' ');
}
}
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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),
);
}
}
+5
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@@ -534,6 +534,11 @@ packages:
url: "https://pub.dev"
source: hosted
version: "3.1.1"
flutter_localizations:
dependency: "direct main"
description: flutter
source: sdk
version: "0.0.0"
flutter_map:
dependency: "direct main"
description:
+4
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@@ -30,6 +30,8 @@ environment:
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
@@ -119,6 +121,7 @@ dependency_overrides:
# The following section is specific to Flutter packages.
flutter:
generate: true
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
@@ -128,6 +131,7 @@ flutter:
assets:
- assets/
- assets/images/
- assets/translations_dynamic/
# To add assets to your application, add an assets section, like this:
# assets: