translation_script.dart helps generate AppLocalizations for Flutter projects.

translation_script.dart

import 'dart:convert';
import 'dart:io';
import 'package:csv/csv.dart';

const projectPaTH = "."; //EDIT THIS
const enPath = '$projectPATH/lib/assets/l10n/app_en.arb';
const esPath = '$projectPATH/lib/assets/l10n/app_es.arb';
const ptPath = '$projectPATH/lib/assets/l10n/app_pt.arb';

String toCapitalized(String x) {
  return x.length > 0
      ? '${x[0].toUpperCase()}${x.substring(1).toLowerCase()}'
      : '';
}

String toCamelCase(String x) {
  final almost = x
      .replaceAll(RegExp(' +'), ' ')
      .split(' ')
      .map((str) => toCapitalized(str))
      .join('');
  if (almost.length > 2) {
    return almost.replaceFirst(almost[0], almost[0].toLowerCase());
  }
  return almost;
}

String scape(String x) {
  return x
      .replaceAll("’", " ")
      .replaceAll("(", "")
      .replaceAll(")", "")
      .replaceAll(".", "")
      .replaceAll("\"", "\\\"")
      .replaceAll("-", " ")
      .replaceAll("?", " ")
      .replaceAll(",", " ")
      .replaceAll("&", "and")
      .replaceAll("!", " ")
      .replaceAll("/", "slash")
      .replaceAll("\\", "slash2")
      .replaceAll("%", "percent")
      .replaceAll("#", "hash")
      .replaceAll(":", "")
      .replaceAll("`", " ")
      .replaceAll("*", " ")
      .replaceAll("‘", " ")
      .replaceAll("€", "eur");
}

final reservedWords = [
  "continue",
  "if",
  "int",
  "double",
  "else",
  "void",
  "break",
  "return"
];

Future<void> main() async {
  final input =
      File('$HOME/Documents/translation_table.csv').openRead();
  final fields = await input
      .transform(utf8.decoder)
      .transform(new CsvToListConverter())
      .toList();
  print(fields.length);
  print(fields.first.length);
  final enOut = File(enPath).openWrite();
  final esOut = File(esPath).openWrite();
  final ptOut = File(ptPath).openWrite();
  print("openFiles");
  enOut.writeln("{");
  esOut.writeln("{");
  ptOut.writeln("{");

  List<String> fieldKeys = [];

  for (final field in fields) {
    final String enString = field[1];
    final esString = field[3];
    final ptString = field[2];
    String keyString = toCamelCase(scape(enString));
    print(keyString);
    int count = 2;
    if (enString.isNotEmpty && enString.length > 2) {
      if (!fieldKeys.contains(enString)) {
        if (reservedWords.contains(keyString)) {
          keyString = "${keyString}x";
        }
        if (fieldKeys.contains(keyString)) {
          keyString = "$keyString$count";
          count++;
        }
        enOut.writeln("\"$keyString\" : \"$enString\",");
        esOut.writeln("\"$keyString\" : \"$esString\",");
        ptOut.writeln("\"$keyString\" : \"$ptString\",");
        fieldKeys.add(enString);
      }
    }
  }
  enOut.writeln("\"end\" : \"end\"");
  esOut.writeln("\"end\" : \"fin\"");
  ptOut.writeln("\"end\" : \"fim\"");
  enOut.writeln("}");
  esOut.writeln("}");
  ptOut.writeln("}");
  enOut.close();
  esOut.close();
  ptOut.close();
}