writeSelection function

WrittenSelection writeSelection(Map<String, Object?> payload, { required Directory refDir, })

Writes sel-<id>.json and sel-<id>.png into refDir for payload (a decoded beacon.selected event) and returns what was written.

Implementation

WrittenSelection writeSelection(Map<String, Object?> payload, {required Directory refDir}) {
  if (!refDir.existsSync()) refDir.createSync(recursive: true);

  final String id = (payload['id'] as String?) ?? DateTime.now().microsecondsSinceEpoch.toRadixString(36);
  final String projectRoot = refDir.parent.path;

  final Map<String, Object?> json = Map<String, Object?>.of(payload)
    ..remove('screenshotBase64')
    ..remove('screenshotSizeBytes');

  String? pngPath;
  final String? screenshotBase64 = payload['screenshotBase64'] as String?;
  if (screenshotBase64 != null && screenshotBase64.isNotEmpty) {
    final File pngFile = File(p.join(refDir.path, 'sel-$id.png'));
    pngFile.writeAsBytesSync(base64Decode(screenshotBase64));
    pngPath = p.relative(pngFile.path, from: projectRoot);
    json['screenshot'] = pngPath;
  }

  final File jsonFile = File(p.join(refDir.path, 'sel-$id.json'));
  jsonFile.writeAsStringSync(const JsonEncoder.withIndent('  ').convert(json));

  return WrittenSelection(
    id: id,
    jsonPath: p.relative(jsonFile.path, from: projectRoot),
    pngPath: pngPath,
    payload: json,
  );
}