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<?php |
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/** |
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* This file is part of the Tarantool Client package. |
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* |
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* (c) Eugene Leonovich <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Tarantool\Client\Connection; |
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use Tarantool\Client\Exception\UnexpectedResponse; |
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final class Greeting |
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{ |
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public const SIZE_BYTES = 128; |
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/** @var string */ |
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private $greeting; |
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/** @var string|null */ |
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private $salt; |
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/** @var string|null */ |
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private $serverVersion; |
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/** @var bool */ |
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private $unknown = false; |
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/** |
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* @param string $greeting |
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*/ |
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private function __construct($greeting) |
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{ |
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$this->greeting = $greeting; |
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} |
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public static function parse(string $greeting) : self |
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{ |
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if (0 === \strpos($greeting, 'Tarantool')) { |
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return new self($greeting); |
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} |
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throw new UnexpectedResponse('Unable to recognize Tarantool server'); |
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} |
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public static function unknown() : self |
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{ |
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$self = new self(''); |
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$self->unknown = true; |
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return $self; |
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} |
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public function getSalt() : string |
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{ |
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if (null !== $this->salt) { |
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return $this->salt; |
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} |
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if ($this->unknown) { |
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throw new \BadMethodCallException('Salt is unknown for persistent connections'); |
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} |
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if (false === $salt = \base64_decode(\substr($this->greeting, 64, 44), true)) { |
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throw new UnexpectedResponse('Unable to decode salt'); |
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} |
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$salt = \substr($salt, 0, 20); |
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if (isset($salt[19])) { |
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return $this->salt = $salt; |
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} |
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throw new UnexpectedResponse('Salt is too short'); |
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} |
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public function getServerVersion() : string |
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{ |
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if (null !== $this->serverVersion) { |
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return $this->serverVersion; |
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} |
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if ($this->unknown) { |
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throw new \BadMethodCallException('Server version is unknown for persistent connections'); |
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} |
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return $this->serverVersion = \substr($this->greeting, 10, \strspn($this->greeting, '0123456789.', 10)); |
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} |
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public function equals(?self $greeting) : bool |
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{ |
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if (!$greeting || $greeting->unknown) { |
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return $this->unknown; |
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} |
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if ($this->unknown) { |
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return true; |
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} |
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return $greeting->getSalt() === $this->getSalt(); |
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} |
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} |
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tarantool-php /
client
