evaluate static method

FrequencyEvalResult evaluate(FrequencyPolicy policy, FrequencyState? state, int now, String? sessionId,)

Pure eligibility check. Blocks if ANY active constraint is exceeded: permanent stop, lifetime total, or the current window.

Implementation

static FrequencyEvalResult evaluate(
  FrequencyPolicy policy,
  FrequencyState? state,
  int now,
  String? sessionId,
) {
  if (state == null) return FrequencyEvalResult.allowed;
  if (state.stoppedAt != null) {
    return const FrequencyEvalResult(false, FrequencySkipReason.stopped);
  }
  final maxTotal = policy.maxTotal;
  if (maxTotal != null && state.total >= maxTotal) {
    return const FrequencyEvalResult(false, FrequencySkipReason.maxTotal);
  }
  final w = policy.maxPerWindow;
  if (w != null) {
    final effective =
        _isWindowExpired(w, state, now, sessionId) ? 0 : state.windowCount;
    if (effective >= w.count) {
      return const FrequencyEvalResult(false, FrequencySkipReason.window);
    }
  }
  return FrequencyEvalResult.allowed;
}