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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. |
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*/ |
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declare(strict_types=1); |
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namespace ProxyManager\Generator\Util; |
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use PackageVersions\Versions; |
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/** |
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* Utility class capable of generating |
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* valid class/property/method identifiers |
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* with a deterministic attached suffix, |
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* in order to prevent property name collisions |
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* and tampering from userland |
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* |
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* @author Marco Pivetta <[email protected]> |
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* @license MIT |
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*/ |
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abstract class IdentifierSuffixer |
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{ |
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const VALID_IDENTIFIER_FORMAT = '/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]+$/'; |
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const DEFAULT_IDENTIFIER = 'g'; |
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private final function __construct() |
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{ |
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} |
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/** |
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* Generates a valid unique identifier from the given name, |
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* with a suffix attached to it |
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*/ |
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public static function getIdentifier(string $name) : string |
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{ |
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static $salt; |
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$salt = $salt ?? $salt = self::loadBaseHashSalt(); |
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$suffix = \substr(\sha1($name . $salt), 0, 5); |
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if (! preg_match(self::VALID_IDENTIFIER_FORMAT, $name)) { |
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return self::DEFAULT_IDENTIFIER . $suffix; |
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} |
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return $name . $suffix; |
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} |
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private static function loadBaseHashSalt() : string |
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{ |
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return \sha1(\serialize(Versions::VERSIONS)); |
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} |
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} |
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Ocramius /
ProxyManager
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