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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\Server\Spi; |
| 6 | |
| 7 | use DateTimeImmutable; |
| 8 | use LambdaTwelve\OneRecord\Model\LogisticsEvent; |
| 9 | use LambdaTwelve\OneRecord\Rdf\Iri; |
| 10 | |
| 11 | /** |
| 12 | * An append-only log of events per logistics object. Events are never |
| 13 | * changed or deleted through the API (the spec), so the interface has no |
| 14 | * update; eraseFor() exists for the host's data-protection operation only. |
| 15 | * |
| 16 | * Every event a store receives carries cargo:eventDate: the server refuses a |
| 17 | * posted event without one and the checked builder refuses to build one. A |
| 18 | * store may rely on that for its occurred-at filters and sorting; the |
| 19 | * in-memory store's fallbacks to the receipt time are defensive only. |
| 20 | */ |
| 21 | interface LogisticsEventStore |
| 22 | { |
| 23 | /** |
| 24 | * Appending an event whose IRI already exists is a StoreException: event |
| 25 | * IRIs are minted by the server, so a repeat is a bug, never an update. |
| 26 | * |
| 27 | * @throws StoreException |
| 28 | */ |
| 29 | public function append(LogisticsEvent $event): void; |
| 30 | |
| 31 | public function get(Iri $eventIri): ?LogisticsEvent; |
| 32 | |
| 33 | /** |
| 34 | * @return list<LogisticsEvent> |
| 35 | */ |
| 36 | public function query(Iri $logisticsObject, EventQuery $query): array; |
| 37 | |
| 38 | /** |
| 39 | * When the list for this object last changed: the newest `created` among |
| 40 | * its events (not the last one appended, which differs only under a |
| 41 | * non-monotonic clock), for Last-Modified on the collection. |
| 42 | */ |
| 43 | public function lastModified(Iri $logisticsObject): ?DateTimeImmutable; |
| 44 | |
| 45 | /** |
| 46 | * Removes every event of an object: the host forgetting it (DataHolder::forget()). |
| 47 | */ |
| 48 | public function eraseFor(Iri $logisticsObject): void; |
| 49 | } |