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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Zicht Online <http://zicht.nl> |
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*/ |
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namespace Zicht\Bundle\UrlBundle\Url; |
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use Zicht\Bundle\UrlBundle\Aliasing\Aliasing; |
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use Zicht\Bundle\UrlBundle\Entity\UrlAlias; |
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// phpcs:disable Zicht.NamingConventions.Functions.NestedDefinition |
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class ShortUrlManager |
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{ |
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/** |
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* @var ShortUrlHashGeneratorInterface |
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*/ |
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private $shortUrlHashGenerator; |
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/** |
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* @var Aliasing |
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*/ |
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private $aliasing; |
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/** |
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* @param Aliasing $aliasing |
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* @param ShortUrlHashGeneratorInterface|null $shortUrlHashGenerator |
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*/ |
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public function __construct(Aliasing $aliasing, ShortUrlHashGeneratorInterface $shortUrlHashGenerator = null) |
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{ |
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$this->aliasing = $aliasing; |
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$this->shortUrlHashGenerator = $shortUrlHashGenerator ?: new class() implements ShortUrlHashGeneratorInterface { |
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/** |
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* {@inheritDoc} |
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*/ |
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public function generate($url, $length) |
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{ |
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return substr(hash('sha1', $url), 0, $length); |
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} |
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}; |
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} |
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/** |
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* @param string $url |
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* @param string|null $prefix |
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* @param int $minLength |
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* @param int $mode |
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* @return UrlAlias |
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*/ |
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public function getAlias($url, $prefix = null, $minLength = 8, $mode = UrlAlias::MOVE) |
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{ |
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if ($prefix && false === strpos($prefix, '/')) { |
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$prefix = sprintf('/%s', $prefix); |
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} |
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do { |
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// the hash will function as our public url |
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$hash = $this->shortUrlHashGenerator->generate($url, $minLength); |
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$publicUrl = $prefix ? sprintf('%s/%s', $prefix, $hash) : $hash; |
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$exists = $this->aliasing->getRepository()->findOneByPublicUrl($publicUrl, $mode); |
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if ($exists && $exists->getInternalUrl() === $url) { |
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return $exists; |
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} |
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$minLength++; |
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// sanely (sha256 consists of 64 chars) fail if we have a collision after numerous attempts. Something might be wronly implemented. |
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if ($minLength >= 65) { |
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throw new \LogicException(sprintf('Found a collision for a hash with %d chars. Something is not right.', $minLength)); |
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} |
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} while ($exists); |
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$this->aliasing->addAlias($publicUrl, $url, $mode); |
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return $this->aliasing->findAlias($publicUrl, $url); |
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} |
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} |
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zicht /
url-bundle
