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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Core\Time; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use DateTimeImmutable; |
| 12 | use DateTimeInterface; |
| 13 | |
| 14 | /** |
| 15 | * Interface for Network Time Protocol (NTP) Time Synchronization Service. |
| 16 | * |
| 17 | * Provides clock-drift-aware authoritative timestamps and token expiration checks |
| 18 | * using certified atomic time servers (GUM, NIST, Cloudflare). |
| 19 | * |
| 20 | * @package App\Core\Time |
| 21 | */ |
| 22 | interface NtpTimeSyncServiceInterface |
| 23 | { |
| 24 | /** |
| 25 | * Returns current authoritative Unix timestamp adjusted by verified NTP clock drift. |
| 26 | * |
| 27 | * @return int Authoritative Unix timestamp in seconds. |
| 28 | */ |
| 29 | public function getAdjustedTimestamp(): int; |
| 30 | |
| 31 | /** |
| 32 | * Returns current authoritative DateTimeImmutable instance adjusted by NTP clock drift. |
| 33 | * |
| 34 | * @return DateTimeImmutable Authoritative UTC DateTime. |
| 35 | */ |
| 36 | public function getAdjustedDateTime(): DateTimeImmutable; |
| 37 | |
| 38 | /** |
| 39 | * Returns current measured clock drift in seconds (positive if server clock is behind NTP). |
| 40 | * |
| 41 | * @return float Clock drift offset in seconds. |
| 42 | */ |
| 43 | public function getClockDriftSeconds(): float; |
| 44 | |
| 45 | /** |
| 46 | * Explicitly queries reference NTP server to measure and cache clock drift. |
| 47 | * |
| 48 | * @param string|null $host Optional NTP server hostname. |
| 49 | * @param int $port NTP port (default 123). |
| 50 | * @param int $timeout Socket timeout in seconds. |
| 51 | * @return float Measured clock drift in seconds. |
| 52 | */ |
| 53 | public function syncWithNtp(?string $host = null, int $port = 123, int $timeout = 2): float; |
| 54 | |
| 55 | /** |
| 56 | * Checks if given expiration time is reached according to authoritative adjusted clock. |
| 57 | * |
| 58 | * @param DateTimeInterface $expiresAt Target expiration timestamp. |
| 59 | * @return bool True if expired, false if still valid. |
| 60 | */ |
| 61 | public function isTokenExpired(DateTimeInterface $expiresAt): bool; |
| 62 | } |