feat: Multiple Language support added

Dhruv80576 commented 3 weeks ago

Fix #1067 Setting now updated, added language switch option. Now this application supports chinese language also. Please find the video attached.

https://github.com/user-attachments/assets/a03e73af-0ae0-4908-906b-ef24d04b1dca

Summary by Sourcery

Add multiple language support to the application, including a language switch option and support for Chinese. Implement a localization system to manage translations using JSON files.

New Features:

Add support for multiple languages, including Chinese, to the application.

Enhancements:

Implement a localization system using JSON files for language translations.

sourcery-ai[bot] commented 3 weeks ago

Reviewer's Guide by Sourcery

The pull request implements multi-language support by adding a localization system that currently supports English and Chinese languages. The implementation uses Flutter's localization framework with JSON-based translation files and includes a locale provider to manage language switching.

Class diagram for localization implementation

classDiagram
    class AppLocalizations {
        +Locale? locale
        +Map<String, String> _localizedStrings
        +Future loadJsonLanguage()
        +String translate(String key)
        +String translateWithArgs(String key, Map<String, dynamic> args)
    }
    class _AppLocalizationsDelegate {
        +bool isSupported(Locale locale)
        +Future<AppLocalizations> load(Locale locale)
        +bool shouldReload(LocalizationsDelegate old)
    }
    class LocaleProvider {
        +Locale _locale
        +Locale get locale()
        +void changeLocale(Locale newLocale)
    }
    AppLocalizations --> _AppLocalizationsDelegate : delegate
    AppLocalizations --> Locale : locale
    LocaleProvider --> Locale : manages
    AppLocalizations --> "1" Map : _localizedStrings

File-Level Changes

Change	Details	Files
Added localization infrastructure and translation system	Created AppLocalizations class to handle translations Implemented LocaleProvider to manage language state Added language JSON files for English and Chinese translations Set up localization delegates and supported locales in MaterialApp	`lib/providers/app_localisation.dart` `lib/providers/locale_provider.dart` `lib/main.dart` `assets/lang/en.json` `assets/lang/zh.json`
Updated UI components to use translated strings	Replaced hardcoded strings with translation keys Added translation extension method for easy string translation Updated navigation drawer text to use translations Modified home screen tabs to use translated labels	`lib/view/widgets/navigation_drawer.dart` `lib/view/widgets/homescreentabs.dart` `lib/view/homescreen.dart`
Added language selection functionality in settings	Implemented language switching dropdown in settings screen Added language mapping between display names and locale codes Connected language selection to LocaleProvider	`lib/view/settings_screen.dart`

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#1067	Implement language switching functionality in the settings	✅

Possibly linked issues

#1067: PR fixes the issue by implementing language change functionality in settings.

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adityastic commented 3 weeks ago

I think we can hop onto a different and scalable solution. More info: https://github.com/fossasia/badgemagic-android/issues/927

fossasia / badgemagic-android