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<?php |
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/* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* This software consists of voluntary contributions made by many individuals |
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* and is licensed under the MIT license. For more information, see |
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* <http://www.doctrine-project.org>. |
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*/ |
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namespace Doctrine\ODM\MongoDB\Id; |
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use Doctrine\ODM\MongoDB\DocumentManager; |
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/** |
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* Generates UUIDs. |
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* |
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* @since 1.0 |
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*/ |
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class UuidGenerator extends AbstractIdGenerator |
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{ |
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/** |
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* A unique environment value to salt each UUID with. |
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* |
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* @var string |
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*/ |
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protected $salt = null; |
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/** |
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* Used to set the salt that will be applied to each id |
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* |
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* @param string $salt The sale to use |
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*/ |
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2 |
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public function setSalt($salt) |
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{ |
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$this->salt = $salt; |
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} |
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/** |
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* Returns the current salt value |
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* |
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* @return string $salt The current salt |
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*/ |
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1 |
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public function getSalt() |
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{ |
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return $this->salt; |
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} |
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/** |
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* Checks that a given string is a valid uuid. |
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* |
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* @param string $uuid The string to check. |
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* @return boolean |
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*/ |
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public function isValid($uuid) |
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{ |
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return preg_match('/^\{?[0-9a-f]{8}\-?[0-9a-f]{4}\-?[0-9a-f]{4}\-?[0-9a-f]{4}\-?[0-9a-f]{12}\}?$/i', $uuid) |
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=== 1; |
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} |
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/** |
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* Generates a new UUID |
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* |
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* @param DocumentManager $dm Not used. |
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* @param object $document Not used. |
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* @return string UUID |
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*/ |
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public function generate(DocumentManager $dm, $document) |
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{ |
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$uuid = $this->generateV4(); |
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return $this->generateV5($uuid, $this->salt ?: php_uname('n')); |
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} |
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/** |
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* Generates a v4 UUID |
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* |
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* @return string |
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*/ |
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public function generateV4() |
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{ |
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4 |
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return sprintf( |
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'%04x%04x%04x%04x%04x%04x%04x%04x', |
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// 32 bits for "time_low" |
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4 |
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mt_rand(0, 0xffff), |
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mt_rand(0, 0xffff), |
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// 16 bits for "time_mid" |
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4 |
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mt_rand(0, 0xffff), |
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// 16 bits for "time_hi_and_version", |
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// four most significant bits holds version number 4 |
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4 |
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mt_rand(0, 0x0fff) | 0x4000, |
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// 16 bits, 8 bits for "clk_seq_hi_res", |
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// 8 bits for "clk_seq_low", |
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// two most significant bits holds zero and one for variant DCE1.1 |
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4 |
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mt_rand(0, 0x3fff) | 0x8000, |
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// 48 bits for "node" |
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4 |
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mt_rand(0, 0xffff), |
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mt_rand(0, 0xffff), |
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4 |
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mt_rand(0, 0xffff) |
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); |
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} |
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/** |
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* Generates a v5 UUID |
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* |
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* @param string $namespace The UUID to seed with |
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* @param string $salt The string to salt this new UUID with |
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* @throws \Exception when the provided namespace is invalid |
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* @return string |
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*/ |
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public function generateV5($namespace, $salt) |
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{ |
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if ( ! $this->isValid($namespace)) { |
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throw new \Exception('Provided $namespace is invalid: ' . $namespace); |
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} |
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// Get hexadecimal components of namespace |
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$nhex = str_replace(array('-', '{', '}'), '', $namespace); |
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// Binary Value |
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$nstr = ''; |
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// Convert Namespace UUID to bits |
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for ($i = 0; $i < strlen($nhex); $i += 2) { |
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$nstr .= chr(hexdec($nhex[$i] . $nhex[$i + 1])); |
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} |
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// Calculate hash value |
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$hash = sha1($nstr . $salt); |
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return sprintf( |
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'%08s%04s%04x%04x%12s', |
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// 32 bits for "time_low" |
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substr($hash, 0, 8), |
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// 16 bits for "time_mid" |
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substr($hash, 8, 4), |
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// 16 bits for "time_hi_and_version", |
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// four most significant bits holds version number 3 |
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2 |
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(hexdec(substr($hash, 12, 4)) & 0x0fff) | 0x3000, |
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// 16 bits, 8 bits for "clk_seq_hi_res", |
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// 8 bits for "clk_seq_low", |
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// two most significant bits holds zero and one for variant DCE1.1 |
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2 |
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(hexdec(substr($hash, 16, 4)) & 0x3fff) | 0x8000, |
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// 48 bits for "node" |
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2 |
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substr($hash, 20, 12) |
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); |
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} |
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} |
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doctrine /
mongodb-odm
