reportStatus method

Future<FormulaStatusResult> reportStatus(FormulaStatusRequest request)

Reports what each formula finds when it looks at itself.

Sequential, not concurrent: these probes shell out, and a node with a dozen formulas firing a dozen processes at once on a small box is a noticeable spike for a panel refresh. They are quick — a version flag and an info — so in order is fast enough.

A formula the node does not have is reported as FormulaStatus.unknown rather than omitted: a caller that asked about it by name is owed an answer, and a silently missing row reads as "still loading".

Implementation

Future<FormulaStatusResult> reportStatus(FormulaStatusRequest request) async {
  final wanted = request.formulas.isEmpty
      ? [for (final formula in registry.formulas) formula.spec.id.value]
      : request.formulas;

  final reports = <FormulaStatusReport>[];
  for (final id in wanted) {
    final formula = registry.byId(id);
    if (formula == null) {
      reports.add(
        FormulaStatusReport(
          formula: FormulaId(id),
          status: FormulaStatus.unknown,
          message: 'this node has no formula "$id"',
          checkedAt: clock.now(),
        ),
      );
      continue;
    }
    reports.add(await formula.status(_context()));
  }

  return FormulaStatusResult(
    requestId: request.requestId,
    reports: reports
      ..sort((a, b) => a.formula.value.compareTo(b.formula.value)),
  );
}