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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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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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namespace UnicornFail\Emoji\Renderer; |
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use League\Configuration\ConfigurationAwareInterface; |
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use League\Configuration\ConfigurationInterface; |
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use UnicornFail\Emoji\Node\Image; |
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use UnicornFail\Emoji\Node\Node; |
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use UnicornFail\Emoji\Util\HtmlElement; |
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final class ImageRenderer implements NodeRendererInterface, ConfigurationAwareInterface |
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{ |
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public const REGEX_UNSAFE_PROTOCOL = '/^javascript:|vbscript:|file:|data:/i'; |
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public const REGEX_SAFE_DATA_PROTOCOL = '/^data:image\/(?:png|gif|jpeg|webp)/i'; |
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/** |
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* @var ConfigurationInterface |
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* |
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* @psalm-readonly-allow-private-mutation |
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* @psalm-suppress PropertyNotSetInConstructor |
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*/ |
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private $config; |
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/** |
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* @param Node $node |
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* |
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* {@inheritDoc} |
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* |
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* @psalm-suppress MoreSpecificImplementedParamType |
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*/ |
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public function render(Node $node) |
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{ |
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if (! ($node instanceof Image)) { |
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throw new \InvalidArgumentException('Incompatible node type: ' . \get_class($node)); |
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} |
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$forbidUnsafeLinks = ! $this->config->get('allow_unsafe_links'); |
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if ($forbidUnsafeLinks && self::isLinkPotentiallyUnsafe($node->getUrl())) { |
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$node->attributes->set('src', ''); |
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} |
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return new HtmlElement('img', $node->attributes->export(), '', true); |
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} |
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public function setConfiguration(ConfigurationInterface $configuration): void |
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{ |
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$this->config = $configuration; |
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} |
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/** |
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* @psalm-pure |
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*/ |
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public static function isLinkPotentiallyUnsafe(string $url): bool |
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{ |
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return \preg_match(self::REGEX_UNSAFE_PROTOCOL, $url) !== 0 && \preg_match(self::REGEX_SAFE_DATA_PROTOCOL, $url) === 0; |
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} |
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} |
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unicorn-fail /
emoji
