loadContextDocumentAsync method

Implementation

@override
Future<JsonValue> loadContextDocumentAsync(
  JsonLdContextDocumentRequest request,
) async {
  final mappedIri = _applyMappings(request.resolvedContextIri);
  final uri = Uri.tryParse(mappedIri);

  if (uri != null && uri.scheme == 'file') {
    final file = File.fromUri(uri);
    if (!file.existsSync()) return null;
    return _decodeDocument(await file.readAsString(), mappedIri);
  }

  if (uri != null && (uri.scheme == 'http' || uri.scheme == 'https')) {
    return null;
  }

  final file = File(mappedIri);
  if (!file.existsSync()) return null;
  return _decodeDocument(await file.readAsString(), mappedIri);
}