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feat(event-subscriber): enrich the projection with the zaak reference via the ACL (refs #78)

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On each notification the subscriber reads the zaak's reference (identificatie)
through the ACL — the only code allowed to talk to ZGW (§8.1) — and persists it on
the register_projection row and in the processed_notifications replay log. Storing
it in the log keeps rebuild log-only (ADR-0008): no ACL/ZGW access on rebuild.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Niek Otten
2026-07-14 14:46:48 +02:00
parent 7b841d6e62
commit 566fc9bcea
19 changed files with 350 additions and 20 deletions
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15
services/event-subscriber/EventSubscriber.Application/NotificationProjector.cs
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@@ -5,17 +5,19 @@ namespace EventSubscriber.Application;
/// out-of-order deliveries (CLAUDE.md §8.6): the notification log dedups, and the projection
/// upsert is idempotent on the zaak id. Rebuilds the projection by replaying the log.
/// </summary>
public sealed class NotificationProjector(INotificationLog log, IProjectionStore store)
public sealed class NotificationProjector(INotificationLog log, IProjectionStore store, IAclClient acl)
{
/// <summary>Handle one inbound notification. Reacts to a zaak being created (INGEDIEND) and a
/// status being set (INGESCHREVEN); ignores everything else.</summary>
/// status being set (INGESCHREVEN); ignores everything else. Enriches the row with the zaak's
/// reference via the ACL (§8.1) and records it so a rebuild needs no ZGW access (#78).</summary>
public async Task HandleAsync(Notification notification, CancellationToken ct = default)
{
if (!notification.IsZaakCreated && !notification.IsZaakStatusSet)
return;
var reference = await acl.GetZaakReferenceAsync(notification.ZaakUrl, ct);
var recorded = new RecordedNotification(
notification.IdempotencyKey, notification.Actie, notification.ZaakId, notification.Resource);
notification.IdempotencyKey, notification.Actie, notification.ZaakId, notification.Resource, reference);
// Atomic record-or-skip: a duplicate (or concurrent) delivery is recognised and dropped
// before it touches the projection, so the projection stays a faithful derived artefact.
@@ -36,7 +38,8 @@ public sealed class NotificationProjector(INotificationLog log, IProjectionStore
/// <summary>The projection row for an accepted notification: a status-set maps to INGESCHREVEN,
/// a zaak-create to INGEDIEND. bsn/naam are deferred (ADR-0008).</summary>
private static RegisterEntry ToEntry(RecordedNotification recorded)
=> new(recorded.ZaakId, recorded.Resource == "status"
? RegistrationStatus.Ingeschreven
: RegistrationStatus.Ingediend);
=> new(
recorded.ZaakId,
recorded.Resource == "status" ? RegistrationStatus.Ingeschreven : RegistrationStatus.Ingediend,
Reference: recorded.Reference);
}