printEscPos method

Future<Map<String, dynamic>> printEscPos(int vendorId, int productId, List<int> commandBytes, { int interfaceNumber = 0, int endpointAddress = 0x01, int readEndpointAddress = 0x81, int timeout = 5000, bool autoInitialize = false, bool autoCut = false, bool expectResponse = false, })

Implementation

Future<Map<String, dynamic>> printEscPos(
  int vendorId,
  int productId,
  List<int> commandBytes, {
  int interfaceNumber = 0,
  int endpointAddress = 0x01,
  int readEndpointAddress = 0x81,
  int timeout = 5000,
  bool autoInitialize = false,
  bool autoCut = false,
  bool expectResponse = false,
}) async {
  List<int> finalCommands = [];

  // Si se solicita inicialización automática, añadir comando de inicialización al principio
  if (autoInitialize) {
    // ESC @ - Inicializar impresora
    finalCommands.addAll([0x1B, 0x40]);
  }

  // Añadir los comandos principales enviados por parámetro
  finalCommands.addAll(commandBytes);

  // Si se solicita corte automático, añadir comando de corte al final
  if (autoCut) {
    // GS V - Cortar papel (modo total)
    finalCommands.addAll([0x1D, 0x56, 0x00]);
  }

  // Convertir List<int> a Uint8List
  final data = Uint8List.fromList(finalCommands);

  // Intentar enviar con varios endpoints si el predeterminado falla
  Map<String, dynamic> result = await sendDataToPrinter(
    vendorId,
    productId,
    data,
    interfaceNumber: interfaceNumber,
    endpointAddress: endpointAddress,
    readEndpointAddress: readEndpointAddress,
    timeout: timeout,
    expectResponse: expectResponse,
  );

  // Si la operación falló, intentar con un endpoint alternativo
  if (result['success'] == false &&
      result['error']?.contains('transferencia') == true) {
    log("Intentando con endpoint alternativo 0x02...");
    result = await sendDataToPrinter(
      vendorId,
      productId,
      data,
      interfaceNumber: interfaceNumber,
      endpointAddress: 0x02,
      readEndpointAddress: readEndpointAddress,
      timeout: timeout,
      expectResponse: expectResponse,
    );
  }

  return result;
}