45 lines
1.1 KiB
Dart
45 lines
1.1 KiB
Dart
import 'dart:async';
|
|
|
|
import 'package:flutter/services.dart' show rootBundle;
|
|
import 'package:meta/meta.dart';
|
|
|
|
final esRegExp = new RegExp("^es-");
|
|
|
|
String getFallbackLang(String lang) {
|
|
if (lang == 'ast' ||
|
|
lang == 'gl' ||
|
|
lang == 'eu' ||
|
|
lang == 'es' ||
|
|
lang == 'ca' ||
|
|
(esRegExp).allMatches(lang).length > 0) {
|
|
return 'es';
|
|
}
|
|
return 'en';
|
|
}
|
|
|
|
Future<String> getFileNameOfLang(
|
|
{@required String dir,
|
|
@required String fileName,
|
|
@required String ext,
|
|
@required String lang}) async {
|
|
String base = '$dir/$fileName';
|
|
String fallback = getFallbackLang(lang);
|
|
String file = '$base-$lang.$ext';
|
|
if (await assetNotExists(file)) {
|
|
file = '$base-$fallback.$ext';
|
|
if (await assetNotExists(file)) {
|
|
file = '$base.$ext';
|
|
}
|
|
}
|
|
return file;
|
|
}
|
|
|
|
// https://github.com/flutter/flutter/issues/15325
|
|
Future<bool> assetNotExists(String asset) {
|
|
print('Does not exists $asset ?');
|
|
return rootBundle.load(asset).then((_) => false).catchError((err, stack) {
|
|
print(err);
|
|
print(stack);
|
|
return true;
|
|
});
|
|
}
|