i18n.dart

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

/// This script finds all i18n Strings and removes multiple instances
void main(List<String> args) async {
  Directory? dir;
  if (args.isNotEmpty) {
    final argPath = args.first;
    dir = Directory(argPath);

    if (dir.existsSync() == false) {
      print('Invalid Directory');
      return;
    }
  }

  final allStrings = await findI18n(directory: dir);
  final map = <String?, String?>{};

  allStrings.forEach((e) {
    map.putIfAbsent(e, () => e);
  });

  final json = prettyJson(map);
  await File('en.json').writeAsString(json
      .replaceAll(r"\\'", "'")
      .replaceAll(r'\\n', r'\n')
      .replaceAll(r'\\\', r'\'));
}

/// Find i18n Strings
Future<List<String?>> findI18n({
  Directory? directory,
}) async {
  var list = <String?>[];

  final dir = directory ?? Directory('.');

  final raw = dir.list(recursive: true).where(
        (e) => e.path.endsWith('.dart'),
      );

  await for (var f in raw) {
    final contents = await File(f.path).readAsString();

    final regexString = r'''(?:'|")((?:\w|\\(?:'|")\{).+)(?:'|")\s*\.tr\(''';
    final regExp = RegExp(regexString);
    var replaceAll = contents;
    var matches = regExp.allMatches(replaceAll).toList();

    if (matches.isNotEmpty) {
      list.addAll(matches.map((e) => e.group(1)).toList());
    }
  }

  return list;
}

/// Prettify JSON
String prettyJson(dynamic json, {int indent = 2}) {
  var spaces = ' ' * indent;
  var encoder = JsonEncoder.withIndent(spaces);
  return encoder.convert(json);
}