Add localizations system

lib/i18n/i18n.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+import 'messages_all.dart';
+
+class I18n {
+  I18n(this.localeName);
+
+  static Future<I18n> load(Locale locale) {
+    final String name =
+        locale.countryCode.isEmpty ? locale.languageCode : locale.toString();
+    final String localeName = Intl.canonicalizedLocale(name);
+    return initializeMessages(localeName).then((_) {
+      return I18n(localeName);
+    });
+  }
+
+  static I18n of(BuildContext context) {
+    return Localizations.of<I18n>(context, I18n);
+  }
+
+  final String localeName;
+
+  /* <=============> Translations <=============> */
+
+  String get close => Intl.message("Close");
+
+  String get confirm => Intl.message("Confirm");
+
+  String get create => Intl.message("Create");
+
+  String get createNewGroup => Intl.message("Create new group");
+
+  String get enterAGroupName => Intl.message("Enter a group name");
+
+  String get enterAUsername => Intl.message("Enter a username");
+
+  String get groupIsPublic => Intl.message("Group is public");
+
+  String get makeSureTheIdentifierIsValid =>
+      Intl.message("Make sure the identifier is valid");
+
+  String get newPrivateChat => Intl.message("New private chat");
+
+  String get optionalGroupName => Intl.message("(Optional) Group name");
+
+  String get pleaseEnterAMatrixIdentifier =>
+      Intl.message('Please enter a matrix identifier');
+
+  String get title => Intl.message(
+        'FluffyChat',
+        name: 'title',
+        desc: 'Title for the application',
+        locale: localeName,
+      );
+
+  String get username => Intl.message("Username");
+
+  String get youCannotInviteYourself =>
+      Intl.message("You cannot invite yourself");
+
+  String get yourOwnUsername => Intl.message("Your own username");
+}

lib/i18n/intl_de.arb

@@ -0,0 +1,9 @@
+{
+  "@@last_modified": "2020-01-20T09:30:07.159333",
+  "title": "FluffyChat",
+  "@title": {
+    "description": "Title for the application",
+    "type": "text",
+    "placeholders": {}
+  }
+}

lib/i18n/intl_messages.arb

@@ -0,0 +1,79 @@
+{
+  "@@last_modified": "2020-01-20T09:50:21.386565",
+  "Close": "Close",
+  "@Close": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Confirm": "Confirm",
+  "@Confirm": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Create": "Create",
+  "@Create": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Create new group": "Create new group",
+  "@Create new group": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Enter a group name": "Enter a group name",
+  "@Enter a group name": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Enter a username": "Enter a username",
+  "@Enter a username": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Group is public": "Group is public",
+  "@Group is public": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Make sure the identifier is valid": "Make sure the identifier is valid",
+  "@Make sure the identifier is valid": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "New private chat": "New private chat",
+  "@New private chat": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "(Optional) Group name": "(Optional) Group name",
+  "@(Optional) Group name": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Please enter a matrix identifier": "Please enter a matrix identifier",
+  "@Please enter a matrix identifier": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "title": "FluffyChat",
+  "@title": {
+    "description": "Title for the application",
+    "type": "text",
+    "placeholders": {}
+  },
+  "Username": "Username",
+  "@Username": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "You cannot invite yourself": "You cannot invite yourself",
+  "@You cannot invite yourself": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "Your own username": "Your own username",
+  "@Your own username": {
+    "type": "text",
+    "placeholders": {}
+  }
+}

lib/i18n/messages_all.dart

@@ -0,0 +1,67 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that looks up messages for specific locales by
+// delegating to the appropriate library.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:implementation_imports, file_names, unnecessary_new
+// ignore_for_file:unnecessary_brace_in_string_interps, directives_ordering
+// ignore_for_file:argument_type_not_assignable, invalid_assignment
+// ignore_for_file:prefer_single_quotes, prefer_generic_function_type_aliases
+// ignore_for_file:comment_references
+
+import 'dart:async';
+
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+import 'package:intl/src/intl_helpers.dart';
+
+import 'messages_de.dart' as messages_de;
+import 'messages_messages.dart' as messages_messages;
+
+typedef Future<dynamic> LibraryLoader();
+Map<String, LibraryLoader> _deferredLibraries = {
+  'de': () => new Future.value(null),
+  'messages': () => new Future.value(null),
+};
+
+MessageLookupByLibrary _findExact(String localeName) {
+  switch (localeName) {
+    case 'de':
+      return messages_de.messages;
+    case 'messages':
+      return messages_messages.messages;
+    default:
+      return null;
+  }
+}
+
+/// User programs should call this before using [localeName] for messages.
+Future<bool> initializeMessages(String localeName) async {
+  var availableLocale = Intl.verifiedLocale(
+    localeName,
+    (locale) => _deferredLibraries[locale] != null,
+    onFailure: (_) => null);
+  if (availableLocale == null) {
+    return new Future.value(false);
+  }
+  var lib = _deferredLibraries[availableLocale];
+  await (lib == null ? new Future.value(false) : lib());
+  initializeInternalMessageLookup(() => new CompositeMessageLookup());
+  messageLookup.addLocale(availableLocale, _findGeneratedMessagesFor);
+  return new Future.value(true);
+}
+
+bool _messagesExistFor(String locale) {
+  try {
+    return _findExact(locale) != null;
+  } catch (e) {
+    return false;
+  }
+}
+
+MessageLookupByLibrary _findGeneratedMessagesFor(String locale) {
+  var actualLocale = Intl.verifiedLocale(locale, _messagesExistFor,
+      onFailure: (_) => null);
+  if (actualLocale == null) return null;
+  return _findExact(actualLocale);
+}

lib/i18n/messages_de.dart

@@ -0,0 +1,26 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that provides messages for a de locale. All the
+// messages from the main program should be duplicated here with the same
+// function name.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:unnecessary_brace_in_string_interps, unnecessary_new
+// ignore_for_file:prefer_single_quotes,comment_references, directives_ordering
+// ignore_for_file:annotate_overrides,prefer_generic_function_type_aliases
+// ignore_for_file:unused_import, file_names
+
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+
+final messages = new MessageLookup();
+
+typedef String MessageIfAbsent(String messageStr, List<dynamic> args);
+
+class MessageLookup extends MessageLookupByLibrary {
+  String get localeName => 'de';
+
+  final messages = _notInlinedMessages(_notInlinedMessages);
+  static _notInlinedMessages(_) => <String, Function> {
+
+  };
+}

lib/i18n/messages_messages.dart

@@ -0,0 +1,26 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that provides messages for a messages locale. All the
+// messages from the main program should be duplicated here with the same
+// function name.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:unnecessary_brace_in_string_interps, unnecessary_new
+// ignore_for_file:prefer_single_quotes,comment_references, directives_ordering
+// ignore_for_file:annotate_overrides,prefer_generic_function_type_aliases
+// ignore_for_file:unused_import, file_names
+
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+
+final messages = new MessageLookup();
+
+typedef String MessageIfAbsent(String messageStr, List<dynamic> args);
+
+class MessageLookup extends MessageLookupByLibrary {
+  String get localeName => 'messages';
+
+  final messages = _notInlinedMessages(_notInlinedMessages);
+  static _notInlinedMessages(_) => <String, Function> {
+
+  };
+}