cake_wallet/tool/append_translation.dart

import 'dart:convert';
import 'dart:io';

import 'package:translator/translator.dart';

const defaultLang = "en";
const langs = [
  "ar", "bg", "cs", "de", "en", "es", "fr", "ha", "hi", "hr", "id", "it",
  "ja", "ko", "my", "nl", "pl", "pt", "ru", "th", "tr", "uk", "ur", "yo",
  "zh-cn" // zh, but Google Translate uses zh-cn for Chinese (Simplified)
];
final translator = GoogleTranslator();

void main(List<String> args) async {
  if (args.length != 2) {
    throw Exception(
        'Insufficient arguments!\n\nTry to run `./append_translation.dart greetings "Hello World!"`');
  }

  final name = args.first;
  final text = args.last;

  print('Appending "$name": "$text"');

  for (var lang in langs) {
    final fileName = getFileName(lang);
    final translation = await getTranslation(text, lang);

    appendArbFile(fileName, name, translation);
  }
}

void appendArbFile(String fileName, String name, String text) {
  final file = File(fileName);
  final inputContent = file.readAsStringSync();
  final arbObj = json.decode(inputContent) as Map<String, dynamic>;

  if (arbObj.containsKey(name)) {
    print("String $name already exists in $fileName!");
    return;
  }

  arbObj.addAll({name: text});

  final outputContent = json
      .encode(arbObj)
      .replaceAll('","', '",\n  "')
      .replaceAll('{"', '{\n  "')
      .replaceAll('"}', '"\n}')
      .replaceAll('":"', '": "');

  file.writeAsStringSync(outputContent);
}


Future<String> getTranslation(String text, String lang) async {
  if (lang == defaultLang) return text;
  return (await translator.translate(text, from: defaultLang, to: lang)).text;
}

String getFileName(String lang) {
  final shortLang = lang
      .split("-")
      .first;
  return "./res/values/strings_$shortLang.arb";
}