create static method

NdefRecord create(
  1. String mimeType,
  2. Uint8List data
)

Builds a media record. Parameters after ; are dropped, since NDEF stores the bare type.

Implementation

static NdefRecord create(String mimeType, Uint8List data) {
  final normalized = mimeType.toLowerCase().trim().split(';').first;
  if (normalized.isEmpty) throw ArgumentError.value(mimeType, 'mimeType', 'is empty');

  final slashIndex = normalized.indexOf('/');
  if (slashIndex <= 0) throw ArgumentError.value(mimeType, 'mimeType', 'must have a major type');
  if (slashIndex == normalized.length - 1) throw ArgumentError.value(mimeType, 'mimeType', 'must have a minor type');
  // As in TextRecord.create: an RFC 2046 media type is ASCII, and reporting it here beats
  // letting `ascii.encode` below raise an error that names neither the parameter nor the rule.
  if (normalized.codeUnits.any((unit) => unit > 0x7F)) {
    throw ArgumentError.value(mimeType, 'mimeType', 'is not an ASCII media type');
  }

  return NdefRecord(
    typeNameFormat: NdefTypeNameFormat.media,
    type: ascii.encode(normalized),
    identifier: Uint8List(0),
    payload: data,
  );
}