addClassIfMissing static method

void addClassIfMissing(String filePath, String className, String classTemplate)

Safely adds a class to the file if it doesn't already exist. If the file does not exist, it will create it.

Implementation

static void addClassIfMissing(String filePath, String className, String classTemplate) {
  final file = File(filePath);
  if (!file.existsSync()) {
    file.createSync(recursive: true);
    file.writeAsStringSync(classTemplate);
    print('✅ Created file and added class: $className');
    return;
  }

  final content = file.readAsStringSync();
  final classRegex = RegExp(r'\bclass\s+' + className + r'\b');

  if (!classRegex.hasMatch(content)) {
    file.writeAsStringSync('$content\n\n$classTemplate');
    print('✅ Added class $className to $filePath');
  } else {
    print('ℹ️ Class $className already exists in $filePath. Skipping class creation.');
  }
}