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<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Codec;
use Ramsey\Uuid\Builder\UuidBuilderInterface;
use Ramsey\Uuid\Exception\InvalidArgumentException;
use Ramsey\Uuid\Exception\InvalidUuidStringException;
use Ramsey\Uuid\Rfc4122\FieldsInterface;
use Ramsey\Uuid\Uuid;
use Ramsey\Uuid\UuidInterface;
use function hex2bin;
use function implode;
use function str_replace;
use function strlen;
use function substr;
/**
* StringCodec encodes and decodes RFC 4122 UUIDs
*
* @link http://tools.ietf.org/html/rfc4122
*
* @psalm-immutable
*/
class StringCodec implements CodecInterface
{
/**
* @var UuidBuilderInterface
*/
private $builder;
/**
* Constructs a StringCodec
*
* @param UuidBuilderInterface $builder The builder to use when encoding UUIDs
*/
public function __construct(UuidBuilderInterface $builder)
{
$this->builder = $builder;
}
public function encode(UuidInterface $uuid): string
{
/** @var FieldsInterface $fields */
$fields = $uuid->getFields();
return $fields->getTimeLow()->toString()
. '-'
. $fields->getTimeMid()->toString()
. '-'
. $fields->getTimeHiAndVersion()->toString()
. '-'
. $fields->getClockSeqHiAndReserved()->toString()
. $fields->getClockSeqLow()->toString()
. '-'
. $fields->getNode()->toString();
}
/**
* @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
{
return $uuid->getFields()->getBytes();
}
/**
* @throws InvalidUuidStringException
*
* @inheritDoc
*/
public function decode(string $encodedUuid): UuidInterface
{
return $this->builder->build($this, $this->getBytes($encodedUuid));
}
public function decodeBytes(string $bytes): UuidInterface
{
if (strlen($bytes) !== 16) {
throw new InvalidArgumentException(
'$bytes string should contain 16 characters.'
);
}
return $this->builder->build($this, $bytes);
}
/**
* Returns the UUID builder
*/
protected function getBuilder(): UuidBuilderInterface
{
return $this->builder;
}
/**
* Returns a byte string of the UUID
*/
protected function getBytes(string $encodedUuid): string
{
$parsedUuid = str_replace(
['urn:', 'uuid:', 'URN:', 'UUID:', '{', '}', '-'],
'',
$encodedUuid
);
$components = [
substr($parsedUuid, 0, 8),
substr($parsedUuid, 8, 4),
substr($parsedUuid, 12, 4),
substr($parsedUuid, 16, 4),
substr($parsedUuid, 20),
];
if (!Uuid::isValid(implode('-', $components))) {
throw new InvalidUuidStringException(
'Invalid UUID string: ' . $encodedUuid
);
}
return (string) hex2bin($parsedUuid);
}
}
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