gen method

Implementation

void gen() {
  final pathSeparator = Platform.pathSeparator;
  final annotation = '@ULoCDeclaration()';
  File declaredFile = File(
    ['lib', 'routes', 'routes.dart'].join(pathSeparator),
  );
  File routesFile = File(
    ['lib', 'routes', 'routes.uloc.g.dart'].join(pathSeparator),
  );

  if (args.length >= 2 && args[1] != '') {
    declaredFile = File(args[1]);
    if (!declaredFile.existsSync()) {
      throw Exception('${args[1]} is not found');
    }
  }

  final content = declaredFile.readAsStringSync();

  if (!content.contains(annotation)) {
    throw Exception('${args[1]} Cannot find ULoCDeclaration');
  }

  final imports = content.split(annotation).first;

  if (args.length >= 3 && args[2] != '') {
    routesFile = File(args[2]);
    if (!routesFile.existsSync()) {
      routesFile.createSync(recursive: true);
    }
  }

  final routesMap = parseULoCRoutesToJson(content);

  List<String> result = [];

  result.add('///');
  result.add('/// **************************************************');
  result.add('/// **** [GENERATED CODE - DO NOT MODIFY BY HAND] ****');
  result.add('/// **************************************************');
  result.add('///');
  result.add(
    '// ignore_for_file: constant_identifier_names, non_constant_identifier_names, dangling_library_doc_comments',
  );
  result.add(imports);
  result.add('/// use this for [named navigation]');
  result.add('class Routes {');
  result.add('  Routes._();');
  result.add('');
  for (MapEntry<String, Map<String, String>> entry in routesMap.entries) {
    result.add(buildRouteName(entry.key, entry.value['route'] ?? ''));
  }
  result.add('}');
  result.add('');
  result.add('/// use this to pass to [MaterialApp] Route setting');
  result.add('final ULoC uloc = ULoC([');
  for (MapEntry<String, Map<String, String>> entry in routesMap.entries) {
    result.add('  RouteProperties<${entry.value['providerName']}>(');
    result.add(
      '    routeName: Routes.${entry.key}${(entry.value['route']?.contains(':') ?? false) ? '()' : ''},',
    );
    result.add('    provider: ${entry.value['provider']},');
    result.add('    child: ${entry.value['child']}(),');
    result.add('  ),');
  }
  result.add(']);');
  result.add('');
  routesFile.writeAsStringSync(result.join('\n'));
  const green = '\x1B[32m';
  const reset = '\x1B[0m';

  print('$green File generated: ${routesFile.absolute.path} $reset');
  exit(0);
}