build method

@override Future build(BuildStep buildStep)

Generates the outputs for a given BuildStep.

Implementation

@override
Future build(BuildStep buildStep) async {
  final currentFile = buildStep.inputId;
  final contents = await buildStep.readAsString(currentFile);
  final currentMap = loadYaml(contents) as YamlMap;
  final currentKeys = currentMap.allKeys;

  final pattern = Glob('**.i18n.yaml');
  final allFiles = await buildStep.findAssets(pattern).toList();
  final currentFileName = currentFile.pathSegments.last.replaceAll(
    '.i18n.yaml',
    '',
  );
  final defaultFile = allFiles.firstWhere(
    (e) {
      final name = e.uri.pathSegments.last.replaceAll('.i18n.yaml', '');
      return !name.contains('_') && currentFileName.startsWith(name);
    },
  );

  if (currentFile != defaultFile) {
    final defaultFileContents = await buildStep.readAsString(defaultFile);
    final defaultMap = loadYaml(defaultFileContents) as YamlMap;
    final defaultKeys = defaultMap.allKeys;
    final maxLength = max(currentKeys.length, defaultKeys.length);

    for (var i = 0; i < maxLength; i++) {
      final currentKey = currentKeys.elementAtOrNull(i);
      final defaultKey = defaultKeys.elementAtOrNull(i);

      if (currentKey == null) {
        log.severe('key "$defaultKey" not found in file $defaultFile');
      }

      if (defaultKey == null) {
        log.severe('key "$currentKey" not found in file $currentFile');
      }

      if (currentKey != defaultKey) {
        log.severe(
          'same location contains 2 different keys:'
          '\n\t"$currentKey" in $currentFile'
          '\n\t"$defaultKey" in $defaultFile',
        );
      }
    }
  }

  final objectName = generateMessageObjectName(currentFile.pathSegments.last);
  var dartContent = generateDartContentFromYaml(objectName, contents);

  try {
    dartContent = DartFormatter().format(dartContent);
  } on FormatterException {
    log.warning(
      'Could not format generated output, it might contain errors.',
    );
  }

  var copy = currentFile.changeExtension('.dart');

  // Write out the new asset.
  await buildStep.writeAsString(copy, dartContent);
}