home/alospiesjs/www/apis/youtube/vendor/ramsey/uuid/src/Codec/TimestampFirstCombCodec.php000060400000006516151163614370025731 0ustar00 * @license http://opensource.org/licenses/MIT MIT */ declare(strict_types=1); namespace Ramsey\Uuid\Codec; use Ramsey\Uuid\Exception\InvalidUuidStringException; use Ramsey\Uuid\UuidInterface; use function bin2hex; use function sprintf; use function substr; use function substr_replace; /** * TimestampFirstCombCodec encodes and decodes COMBs, with the timestamp as the * first 48 bits * * In contrast with the TimestampLastCombCodec, the TimestampFirstCombCodec * adds the timestamp to the first 48 bits of the COMB. To generate a * timestamp-first COMB, set the TimestampFirstCombCodec as the codec, along * with the CombGenerator as the random generator. * * ``` php * $factory = new UuidFactory(); * * $factory->setCodec(new TimestampFirstCombCodec($factory->getUuidBuilder())); * * $factory->setRandomGenerator(new CombGenerator( * $factory->getRandomGenerator(), * $factory->getNumberConverter() * )); * * $timestampFirstComb = $factory->uuid4(); * ``` * * @link https://www.informit.com/articles/printerfriendly/25862 The Cost of GUIDs as Primary Keys * * @psalm-immutable */ class TimestampFirstCombCodec extends StringCodec { /** * @psalm-return non-empty-string * @psalm-suppress MoreSpecificReturnType we know that the retrieved `string` is never empty * @psalm-suppress LessSpecificReturnStatement we know that the retrieved `string` is never empty */ public function encode(UuidInterface $uuid): string { $bytes = $this->swapBytes($uuid->getFields()->getBytes()); return sprintf( '%08s-%04s-%04s-%04s-%012s', bin2hex(substr($bytes, 0, 4)), bin2hex(substr($bytes, 4, 2)), bin2hex(substr($bytes, 6, 2)), bin2hex(substr($bytes, 8, 2)), bin2hex(substr($bytes, 10)) ); } /** * @psalm-return non-empty-string * @psalm-suppress MoreSpecificReturnType we know that the retrieved `string` is never empty * @psalm-suppress LessSpecificReturnStatement we know that the retrieved `string` is never empty */ public function encodeBinary(UuidInterface $uuid): string { /** @phpstan-ignore-next-line PHPStan complains that this is not a non-empty-string. */ return $this->swapBytes($uuid->getFields()->getBytes()); } /** * @throws InvalidUuidStringException * * @inheritDoc */ public function decode(string $encodedUuid): UuidInterface { $bytes = $this->getBytes($encodedUuid); return $this->getBuilder()->build($this, $this->swapBytes($bytes)); } public function decodeBytes(string $bytes): UuidInterface { return $this->getBuilder()->build($this, $this->swapBytes($bytes)); } /** * Swaps bytes according to the timestamp-first COMB rules */ private function swapBytes(string $bytes): string { $first48Bits = substr($bytes, 0, 6); $last48Bits = substr($bytes, -6); $bytes = substr_replace($bytes, $last48Bits, 0, 6); $bytes = substr_replace($bytes, $first48Bits, -6); return $bytes; } }