load method

Future<Map<String, dynamic>> load(Client client)

FR-APP-ONLINE-001~004 — Raw JSON form used internally by loadOnline and by legacy callers.

Implementation

Future<Map<String, dynamic>> load(Client client) async {
  final List<Resource> resources;
  try {
    resources = await client.listResources();
  } catch (e, st) {
    throw _wrapLoad('listResources failed', e, st);
  }

  _logger.debug('Resources listed', {'count': resources.length});

  final appUri = _pickAppUri(resources);
  if (appUri == null) {
    throw ResourceNotFoundException('No UI resources found');
  }

  _logger.info('Loading application', {'uri': appUri});

  final ReadResourceResult resource;
  try {
    resource = await client.readResource(appUri);
  } catch (e, st) {
    throw _wrapLoad('readResource failed', e, st);
  }

  if (resource.contents.isEmpty) {
    throw DefinitionParseException(appUri);
  }
  final text = resource.contents.first.text;
  if (text == null) {
    throw DefinitionParseException(appUri);
  }

  try {
    final decoded = jsonDecode(text);
    if (decoded is! Map<String, dynamic>) {
      throw DefinitionParseException(appUri);
    }
    return decoded;
  } on DefinitionParseException {
    rethrow;
  } catch (e) {
    throw DefinitionParseException(appUri, cause: e);
  }
}