startBackground static method

Future<void> startBackground(Map<String, dynamic> data)

Implementation

static Future<void> startBackground(Map<String, dynamic> data) async {
  final sendPort = data['send'] as SendPort;
  try {
    final rootToken = data['instance'] as RootIsolateToken?;
    if (rootToken == null) {
      sendPort.send({"res": false, "info": "RootIsolateToken is null"});
      return;
    }

    BackgroundIsolateBinaryMessenger.ensureInitialized(rootToken);
    const backgroundChannel = MethodChannel('turn_bartender');
    final transferInfo = <String, dynamic>{
      "btwPath": data['path'],
      "info": data['info'],
      "copyNum": data['copyNum'] as int,
      "toPdf": data['toPdf'] as bool,
    };

    if (data['printerName'] != null &&
        data['printerName'].toString().isNotEmpty) {
      transferInfo['printerName'] = data['printerName'];
    }

    final result = await backgroundChannel.invokeMethod<Map>(
      "printLabel",
      transferInfo,
    );
    sendPort.send(_normalizeRawPrintResult(result));
  } on PlatformException catch (e) {
    sendPort.send({
      "res": false,
      "info": "PlatformException(${e.code}): ${e.message ?? 'unknown'}",
    });
  } catch (e) {
    sendPort.send({"res": false, "info": "Background isolate exception: $e"});
  }
}