tripz-llc/apps/driver/lib/controller/local/phone_intel/helpers.dart

import 'countries.dart';

bool isNumeric(String s) =>
    s.isNotEmpty && int.tryParse(s.replaceAll("+", "")) != null;

String removeDiacritics(String str) {
  var withDia =
      'ÀÁÂÃÄÅàáâãäåÒÓÔÕÕÖØòóôõöøÈÉÊËèéêëðÇçÐÌÍÎÏìíîïÙÚÛÜùúûüÑñŠšŸÿýŽž';
  var withoutDia =
      'AAAAAAaaaaaaOOOOOOOooooooEEEEeeeeeCcDIIIIiiiiUUUUuuuuNnSsYyyZz';

  for (int i = 0; i < withDia.length; i++) {
    str = str.replaceAll(withDia[i], withoutDia[i]);
  }

  return str;
}

extension CountryExtensions on List<Country> {
  List<Country> stringSearch(String search) {
    search = removeDiacritics(search.toLowerCase());
    return where(
      (country) => isNumeric(search) || search.startsWith("+")
          ? country.dialCode.contains(search)
          : removeDiacritics(country.name.replaceAll("+", "").toLowerCase())
                  .contains(search) ||
              country.nameTranslations.values.any((element) =>
                  removeDiacritics(element.toLowerCase()).contains(search)),
    ).toList();
  }
}