thirdPartyLicenses function

Implementation

Stream<LicenseEntry> thirdPartyLicenses(AssetBundle bundle) async* {
  final index = jsonDecode(
    await bundle.loadString(thirdPartyLicenseIndexPath),
  ) as Map<String, dynamic>;
  final texts = <String, String>{};
  for (final file in (index['text_files'] as List<dynamic>).cast<String>()) {
    final chunk = jsonDecode(
      await bundle.loadString('assets/licenses/$file'),
    ) as Map<String, dynamic>;
    texts.addAll(chunk.cast<String, String>());
  }
  for (final component
      in (index['components'] as List<dynamic>).cast<Map<String, dynamic>>()) {
    final refs = (component['texts'] as List<dynamic>)
        .cast<Map<String, dynamic>>();
    if (refs.isEmpty) {
      continue;
    }
    final version = component['version'] as String?;
    final name = component['name'] as String;
    yield LicenseEntryWithLineBreaks(<String>[
      version == null ? name : '$name $version',
    ], refs.map((ref) => texts[ref['sha256'] as String]!).join('\n\n'));
  }
}