app localization structure

lang/en.json

@@ -0,0 +1,43 @@
+{
+    "tab_service": "SERVICE",
+    "tab_slides": "SLIDES",
+    "floating_button_search": "New service item",
+    "button_cancel": "CANCEL",
+    "button_show": "SHOW",
+    "button_ok": "OK",
+    "alert": "Alert",
+    "dialog_alert_title": "Type your alert",
+    "display": "Display",
+    "display_option_blank": "Blank screen",
+    "display_option_theme": "Theme background",
+    "display_option_desktop": "Desktop",
+    "display_option_show": "Full projection",
+    "plugin_songs_singular": "Song",
+    "plugin_songs_plural": "Songs",
+    "plugin_bibles_singular": "Bible",
+    "plugin_bibles_plural": "Bibles",
+    "plugin_presentations_singular": "Presentation",
+    "plugin_presentations_plural": "Presentations",
+    "plugin_images_singular": "Image",
+    "plugin_images_plural": "Images",
+    "plugin_media_singular": "Media",
+    "plugin_media_plural": "Medias",
+    "plugin_custom_singular": "Custom",
+    "plugin_custom_plural": "Customs",
+    "search_results_go": "Go live",
+    "search_results_add": "Add to service",
+    "search_results_add_and_go": "Add & Go to service",
+    "service_list_empty": "Any item added to service.\nPlease, add a new service item tapping the add button.",
+    "settings": "Settings",
+    "settings_server_ip": "Server IP",
+    "settings_server_port": "Server port",
+    "settings_use_https": "User HTTPS",
+    "settings_needs_auth": "Needs auth",
+    "settings_user_id": "User ID",
+    "settings_user_pass": "User password",
+    "settings_about_openlp": "About OpenLP",
+    "dialog_server_ip_title": "Type the IP",
+    "dialog_server_port_title": "Type the port",
+    "dialog_server_user_id_title": "Type the ID",
+    "dialog_server_user_pass_title": "Type the password"
+}

lang/pt.json

@@ -0,0 +1,3 @@
+{
+    "tab_service_label": "CULTO"
+}

lib/main.dart

@@ -21,15 +21,36 @@
 // DEALINGS IN THE SOFTWARE.
 
 import 'package:flutter/material.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 
 import 'src/openlp_mobile_remote_app.dart';
-import 'src/app_theme.dart';
+import 'src/configurations/app_theme.dart';
+import 'src/configurations/app_localizations.dart';
 import 'src/screens/settings.dart';
 
 void main() => runApp(
       MaterialApp(
         debugShowCheckedModeBanner: false,
         theme: appTheme,
+        supportedLocales: [
+          Locale('en'),
+          Locale('pt'),
+        ],
+        localizationsDelegates: [
+          AppLocalizations.delegate,
+          GlobalMaterialLocalizations.delegate,
+          GlobalWidgetsLocalizations.delegate,
+        ],
+        localeResolutionCallback: (locale, supportedLocales) {
+          for (var supportedLocale in supportedLocales) {
+            if (supportedLocale.languageCode == locale.languageCode) {
+              // if (supportedLocale.countryCode == locale.countryCode) {
+                return supportedLocale;
+              // }
+            }
+          }
+          return supportedLocales.first;
+        },
         routes: <String, WidgetBuilder>{
           '/': (context) => OpenLPMobileRemoteApp(),
           '/settings': (context) => Settings(),

lib/src/configurations/app_localizations.dart

@@ -0,0 +1,56 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class AppLocalizations {
+  final Locale locale;
+
+  AppLocalizations(this.locale);
+
+  static AppLocalizations of(BuildContext context) =>
+      Localizations.of<AppLocalizations>(context, AppLocalizations);
+
+  Map<String, String> _localizedString;
+
+  Future<void> load() async {
+    String jsonFileName = 'lang/${locale.languageCode}';
+    if (locale.countryCode != null) {
+      jsonFileName += '_${locale.countryCode}';
+    }
+    jsonFileName += '.json';
+
+    String mainJsonString = await rootBundle.loadString('lang/en.json');
+    Map<String, dynamic> jsonMap = json.decode(mainJsonString);
+
+    String localizedJsonString = await rootBundle.loadString(jsonFileName);
+    jsonMap.addAll(json.decode(localizedJsonString));
+
+    _localizedString =
+        jsonMap.map((key, value) => MapEntry(key, value.toString()));
+  }
+
+  String translate(String key) => _localizedString[key];
+
+  static const LocalizationsDelegate<AppLocalizations> delegate =
+      _AppLocalizationsDelegate();
+}
+
+class _AppLocalizationsDelegate
+    extends LocalizationsDelegate<AppLocalizations> {
+  const _AppLocalizationsDelegate();
+
+  @override
+  bool isSupported(Locale locale) => true;
+
+  @override
+  Future<AppLocalizations> load(Locale locale) async {
+    AppLocalizations localizations = new AppLocalizations(locale);
+    await localizations.load();
+    return localizations;
+  }
+
+  @override
+  bool shouldReload(_AppLocalizationsDelegate old) => false;
+}

lib/src/models/plugin.dart

@@ -22,6 +22,8 @@
 
 import 'package:flutter/material.dart';
 
+import '../resources/openlp_icons.dart';
+
 class Plugin {
   final String id;
 
@@ -30,17 +32,17 @@ class Plugin {
   IconData icon() {
     switch (this.id) {
       case 'songs':
-        return Icons.audiotrack;
+        return OpenLPIcons.songs;
       case 'bibles':
-        return Icons.book;
+        return OpenLPIcons.biblies;
       case 'presentations':
-        return Icons.present_to_all;
+        return OpenLPIcons.presentations;
       case 'images':
-        return Icons.image;
+        return OpenLPIcons.images;
       case 'media':
-        return Icons.ondemand_video;
+        return OpenLPIcons.media;
       case 'custom':
-        return Icons.video_label;
+        return OpenLPIcons.custom;
     }
     return Icons.screen_share;
   }

lib/src/openlp_mobile_remote_app.dart

@@ -21,6 +21,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 import 'package:flutter/material.dart';
+import 'package:openlp_remote/src/configurations/app_localizations.dart';
 
 import 'widgets/bottom_navigation_bar.dart';
 import 'widgets/search_floating_button.dart';
@@ -58,8 +59,8 @@ class _OpenLPMobileRemoteAppState extends State<OpenLPMobileRemoteApp>
         ],
         bottom: TabBar(
           tabs: <Widget>[
-            Tab(text: 'SERVICE'),
+            Tab(text: AppLocalizations.of(context).translate('tab_service')),
-            Tab(text: 'SLIDES'),
+            Tab(text: AppLocalizations.of(context).translate('tab_slides')),
           ],
           controller: tabController,
         ),

lib/src/resources/openlp_icons.dart

@@ -23,9 +23,10 @@
 import 'package:flutter/material.dart';
 
 class OpenLPIcons {
-  final IconData songs = Icons.audiotrack;
+  static final IconData songs = Icons.audiotrack;
-  final IconData biblies = Icons.book;
+  static final IconData biblies = Icons.book;
-  final IconData presentations = Icons.present_to_all;
+  static final IconData images = Icons.image;
-  final IconData media = Icons.ondemand_video;
+  static final IconData presentations = Icons.present_to_all;
-  final IconData custom = Icons.video_label;
+  static final IconData media = Icons.ondemand_video;
+  static final IconData custom = Icons.video_label;
 }

lib/src/screens/search_service_item.dart

@@ -22,6 +22,8 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
+
 class SearchServiceItem extends SearchDelegate {
   @override
   List<Widget> buildActions(BuildContext context) {
@@ -54,20 +56,23 @@ class SearchServiceItem extends SearchDelegate {
               ),
             ),
             ListTile(
-              title: Text('Go live'),
+              title: Text(
+                  AppLocalizations.of(context).translate('search_results_go')),
               onTap: () {
                 Navigator.of(context).pop();
                 close(context, null);
               },
             ),
             ListTile(
-              title: Text('Add to service'),
+              title: Text(
+                  AppLocalizations.of(context).translate('search_results_add')),
               onTap: () {
                 Navigator.of(context).pop();
               },
             ),
             ListTile(
-              title: Text('Add & Go to service'),
+              title: Text(AppLocalizations.of(context)
+                  .translate('search_results_add_and_go')),
               onTap: () {
                 Navigator.of(context).pop();
                 close(context, null);

lib/src/screens/service_list_view.dart

@@ -22,6 +22,7 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
 import '../models/service_item.dart';
 
 class ServiceListView extends StatefulWidget {
@@ -64,8 +65,7 @@ class _ServiceListViewState extends State<ServiceListView> {
             maxWidth: 250,
           ),
           child: Text(
-            'Any item added to service.\n' +
+            AppLocalizations.of(context).translate('service_list_empty'),
-                'Please, add a new service item tapping the "New service item" button.',
             textAlign: TextAlign.center,
             style: TextStyle(color: Colors.black38),
           ),
@@ -94,7 +94,8 @@ class _ServiceListViewState extends State<ServiceListView> {
             ),
           ),
           title: Text(item.title),
-          subtitle: Text(item.plugin.id),
+          subtitle: Text(AppLocalizations.of(context)
+              .translate('plugin_${item.plugin.id}_singular')),
           trailing: IconButton(
             icon: Icon(Icons.delete),
             onPressed: () {},

lib/src/screens/settings.dart

@@ -23,6 +23,7 @@
 import 'package:flutter/material.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+import '../configurations/app_localizations.dart';
 
 class Settings extends StatefulWidget {
   @override
@@ -52,32 +53,37 @@ class _SettingState extends State<Settings> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text('Settings'),
+        title: Text(AppLocalizations.of(context).translate('settings')),
       ),
       body: ListView(
         children: <Widget>[
           ListTile(
-            title: Text('Server IP'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_server_ip')),
             subtitle: Text(serverIp),
             onTap: () {
               showDialog<String>(
                 context: context,
-                builder: (context) => _InputDialog('Type the IP'),
+                builder: (context) => _InputDialog(AppLocalizations.of(context)
+                    .translate('dialog_server_ip_title')),
               );
             },
           ),
           ListTile(
-            title: Text('Server port'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_server_port')),
             subtitle: Text('$serverPort'),
             onTap: () {
               showDialog<String>(
                 context: context,
-                builder: (context) => _InputDialog('Type the port'),
+                builder: (context) => _InputDialog(AppLocalizations.of(context)
+                    .translate('dialog_server_port_title')),
               );
             },
           ),
           CheckboxListTile(
-            title: Text('Use HTTPS'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_use_https')),
             onChanged: (value) {
               setState(() {
                 useHttps = value;
@@ -87,7 +93,8 @@ class _SettingState extends State<Settings> {
           ),
           Divider(),
           CheckboxListTile(
-            title: Text('Needs auth'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_needs_auth')),
             onChanged: (value) {
               setState(() {
                 needsAuth = value;
@@ -97,29 +104,34 @@ class _SettingState extends State<Settings> {
           ),
           ListTile(
             enabled: needsAuth,
-            title: Text('User ID'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_user_id')),
             subtitle: Text(userId),
             onTap: () {
               showDialog<String>(
                 context: context,
-                builder: (context) => _InputDialog('Type the username'),
+                builder: (context) => _InputDialog(AppLocalizations.of(context)
+                    .translate('dialog_server_user_id_title')),
               );
             },
           ),
           ListTile(
             enabled: needsAuth,
-            title: Text('User password'),
+            title: Text(
+                AppLocalizations.of(context).translate('settings_user_pass')),
             subtitle: Text(userPassword),
             onTap: () {
               showDialog<String>(
                 context: context,
-                builder: (context) => _InputDialog('Type the password'),
+                builder: (context) => _InputDialog(AppLocalizations.of(context)
+                    .translate('dialog_server_user_pass_title')),
               );
             },
           ),
           Divider(),
           ListTile(
-            title: Text('About OpenLP'),
+            title: Text(AppLocalizations.of(context)
+                .translate('settings_about_openlp')),
             onTap: () {
               launch('https://openlp.org/');
             },
@@ -143,13 +155,13 @@ class _InputDialog extends StatelessWidget {
       content: TextField(autofocus: true),
       actions: <Widget>[
         FlatButton(
-          child: Text('CANCEL'),
+          child: Text(AppLocalizations.of(context).translate('button_cancel')),
           onPressed: () {
             Navigator.pop(context);
           },
         ),
         FlatButton(
-          child: Text('OK'),
+          child: Text(AppLocalizations.of(context).translate('button_ok')),
           onPressed: () {
             Navigator.pop(context, '');
           },

lib/src/widgets/bottom_navigation_bar.dart

@@ -22,6 +22,8 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
+
 import 'display_options_dialog.dart';
 import 'show_alert_dialog.dart';
 
@@ -36,18 +38,26 @@ class AppBottomNavigationBar extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final List<_Action> _actions = [
-      _Action(Icons.add_alert, 'Alert', () {
+      _Action(
+        Icons.add_alert,
+        AppLocalizations.of(context).translate('alert'),
+        () {
           showDialog(
             context: context,
             builder: (context) => ShowAlertDialog(),
           );
-      }),
+        },
-      _Action(Icons.personal_video, 'Display', () {
+      ),
+      _Action(
+        Icons.personal_video,
+        AppLocalizations.of(context).translate('display'),
+        () {
           showDialog(
             context: context,
             builder: (context) => DisplayOptionsDialog(),
           );
-      }),
+        },
+      ),
     ];
     return BottomAppBar(
       child: Row(

lib/src/widgets/display_options_dialog.dart

@@ -22,26 +22,40 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
+
 class _Action {
-  String title;
+  String titleKey;
   VoidCallback callback;
-  _Action(this.title, this.callback);
+  _Action({@required this.titleKey, @required this.callback});
 }
 
 class DisplayOptionsDialog extends StatelessWidget {
   final List<_Action> _actions = [
-    _Action('Blank screen', () {
+    _Action(
+      titleKey: 'display_option_blank',
+      callback: () {
         print('Blank screen');
-    }),
+      },
-    _Action('Theme background', () {
+    ),
+    _Action(
+      titleKey: 'display_option_theme',
+      callback: () {
         print('Theme screen');
-    }),
+      },
-    _Action('Desktop', () {
+    ),
+    _Action(
+      titleKey: 'display_option_desktop',
+      callback: () {
         print('Desktop screen');
-    }),
+      },
-    _Action('Full projection', () {
+    ),
+    _Action(
+      titleKey: 'display_option_show',
+      callback: () {
         print('Show screen');
-    }),
+      },
+    ),
   ];
 
   @override
@@ -52,7 +66,8 @@ class DisplayOptionsDialog extends StatelessWidget {
           .map((action) => OutlineButton(
                 borderSide: BorderSide(color: Theme.of(context).primaryColor),
                 textColor: Theme.of(context).primaryColor,
-                child: Text(action.title),
+                child: Text(
+                    AppLocalizations.of(context).translate(action.titleKey)),
                 onPressed: () {
                   action.callback();
                   Navigator.of(context).pop();

lib/src/widgets/search_floating_button.dart

@@ -22,18 +22,20 @@
 
 import 'package:flutter/material.dart';
 
-import '../widgets/service_item_bottom_sheet.dart';
+import '../configurations/app_localizations.dart';
+import '../widgets/select_service_item_bottom_sheet.dart';
 
 class SearchFloatingButton extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return FloatingActionButton.extended(
-      label: Text('New service item'),
+      label: Text(AppLocalizations.of(context)
+          .translate('floating_button_search')),
       icon: Icon(Icons.search),
       onPressed: () {
         showModalBottomSheet<void>(
           context: context,
-          builder: (context) => ServiceItemBottomSheet(),
+          builder: (context) => SelectServiceItemBottomSheet(),
         );
       },
     );

lib/src/widgets/select_service_item_bottom_sheet.dart

@@ -22,21 +22,24 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
+import '../resources/openlp_icons.dart';
 import '../screens/search_service_item.dart';
 
 class _ServiceItem {
   IconData icon;
-  String title;
+  String titleKey;
-  _ServiceItem({this.icon, this.title});
+  _ServiceItem({@required this.icon, @required this.titleKey});
 }
 
-class ServiceItemBottomSheet extends StatelessWidget {
+class SelectServiceItemBottomSheet extends StatelessWidget {
   final List<_ServiceItem> _serviceItems = [
-    _ServiceItem(icon: Icons.audiotrack, title: 'Songs'),
+    _ServiceItem(icon: OpenLPIcons.songs, titleKey: 'plugin_songs_plural'),
-    _ServiceItem(icon: Icons.book, title: 'Bibles'),
+    _ServiceItem(icon: OpenLPIcons.biblies, titleKey: 'plugin_bibles_plural'),
-    _ServiceItem(icon: Icons.present_to_all, title: 'Presentations'),
+    _ServiceItem(icon: OpenLPIcons.presentations, titleKey: 'plugin_presentations_plural'),
-    _ServiceItem(icon: Icons.image, title: 'Images'),
+    _ServiceItem(icon: OpenLPIcons.images, titleKey: 'plugin_images_plural'),
-    _ServiceItem(icon: Icons.ondemand_video, title: 'Medias'),
+    _ServiceItem(icon: OpenLPIcons.media, titleKey: 'plugin_media_plural'),
+    _ServiceItem(icon: OpenLPIcons.custom, titleKey: 'plugin_custom_plural'),
   ];
   @override
   Widget build(BuildContext context) {
@@ -45,7 +48,7 @@ class ServiceItemBottomSheet extends StatelessWidget {
         children: _serviceItems.map((item) {
           return ListTile(
             leading: Icon(item.icon),
-            title: Text(item.title),
+            title: Text(AppLocalizations.of(context).translate(item.titleKey)),
             onTap: () {
               Navigator.of(context).pop();
               showSearch(context: context, delegate: SearchServiceItem());

lib/src/widgets/show_alert_dialog.dart

@@ -22,20 +22,22 @@
 
 import 'package:flutter/material.dart';
 
+import '../configurations/app_localizations.dart';
+
 class ShowAlertDialog extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return AlertDialog(
-      title: Text('Type your alert'),
+      title: Text(AppLocalizations.of(context).translate('dialog_alert_title')),
       actions: <Widget>[
         FlatButton(
-          child: Text('Cancel'),
+          child: Text(AppLocalizations.of(context).translate('button_cancel')),
           onPressed: () {
             Navigator.of(context).pop();
           },
         ),
         FlatButton(
-          child: Text('Show'),
+          child: Text(AppLocalizations.of(context).translate('button_show')),
           onPressed: () {
             Navigator.of(context).pop();
           },

pubspec.yaml

@@ -42,6 +42,8 @@ dependencies:
   flutter:
     sdk: flutter
   url_launcher: ^5.1.2
+  flutter_localizations:
+    sdk: flutter
 
 dev_dependencies:
   flutter_test:
@@ -60,9 +62,9 @@ flutter:
   uses-material-design: true
 
   # To add assets to your application, add an assets section, like this:
-  # assets:
+  assets:
-  #  - images/a_dot_burr.jpeg
+    - lang/en.json
-  #  - images/a_dot_ham.jpeg
+    - lang/pt.json
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware.