generate method Null safety

  1. @override
Future<String> generate(
  1. LibraryReader library,
  2. BuildStep step
)
override

Generates Dart code for an input Dart library.

May create additional outputs through the buildStep, but the 'primary' output is Dart code returned through the Future. If there is nothing to generate for this library may return null, or a Future that resolves to null or the empty string.

Implementation

@override
Future<String> generate(LibraryReader library, BuildStep step) async {
  var f = File('./lib/src/currencies.json');
  var raw = f.readAsStringSync();
  List<dynamic> currencies = jsonDecode(raw);

  final outputEnum = <String>[
    '''enum CurrencyCode {

      '''
  ];
  final outputClass = <String>[
    '''class PaylikeCurrencyCollection {
        static final Map<CurrencyCode, PaylikeCurrency> currencies = {

    '''
  ];
  for (var currency in currencies) {
    var parsed = PaylikeCurrency.fromJSON(currency);
    outputEnum.add('''
    ${parsed.code},
    ''');
    outputClass.add('''
      CurrencyCode.${parsed.code}: PaylikeCurrency('${parsed.code}', '${parsed.currency}', ${parsed.numeric}, ${parsed.exponent}),
    ''');
  }

  outputEnum.add('}');
  outputClass.add('};}');

  return '''
  import 'package:paylike_currencies/paylike_currencies.dart';

  ${outputEnum.join('')}
  ${outputClass.join('')}
  ''';
}