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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\Server; |
| 6 | |
| 7 | use DateTimeImmutable; |
| 8 | use DateTimeZone; |
| 9 | use Psr\Clock\ClockInterface; |
| 10 | |
| 11 | /** |
| 12 | * The real clock, in UTC, at millisecond precision. JSON-LD timestamps are |
| 13 | * written with milliseconds (Literal::dateTime), so a finer clock would make |
| 14 | * a stored document differ from the instant the server computed; truncating |
| 15 | * here keeps every store, in memory or in a database, byte-identical. |
| 16 | * Hosts with a PSR-20 clock of their own should truncate the same way. |
| 17 | */ |
| 18 | final class SystemClock implements ClockInterface |
| 19 | { |
| 20 | public function now(): DateTimeImmutable |
| 21 | { |
| 22 | $now = new DateTimeImmutable('now', new DateTimeZone('UTC')); |
| 23 | |
| 24 | return $now->setTime((int) $now->format('G'), (int) $now->format('i'), (int) $now->format('s'), (int) $now->format('v') * 1000); |
| 25 | } |
| 26 | } |