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<?php |
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namespace BenTools\MercurePHP\Security; |
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use BenTools\MercurePHP\Model\Message; |
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use Lcobucci\JWT\Token; |
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use Rize\UriTemplate; |
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final class TopicMatcher |
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{ |
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public static function matchesTopicSelectors(string $topic, array $topicSelectors): bool |
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{ |
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if (\in_array($topic, $topicSelectors, true)) { |
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return true; |
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} |
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if (\in_array('*', $topicSelectors, true)) { |
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return true; |
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} |
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foreach ($topicSelectors as $topicSelector) { |
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if (self::matchesUriTemplate($topic, $topicSelector)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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private static function matchesUriTemplate(string $topic, string $topicSelector): bool |
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{ |
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static $uriTemplate; |
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$uriTemplate ??= new UriTemplate(); |
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return false !== \strpos($topicSelector, '{') |
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&& null !== $uriTemplate->extract($topicSelector, $topic, true); |
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} |
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public static function canSubscribeToTopic(string $topic, ?Token $token, bool $allowAnonymous): bool |
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{ |
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if (true === $allowAnonymous) { |
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return true; |
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} |
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if (null === $token) { |
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return false; |
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} |
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try { |
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$claim = (array) $token->getClaim('mercure'); |
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} catch (\OutOfBoundsException $e) { |
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return false; |
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} |
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$allowedTopics = $claim['subscribe'] ?? []; |
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$deniedTopics = $claim['subscribe_exclude'] ?? []; |
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return self::matchesTopicSelectors($topic, $allowedTopics) |
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&& !self::matchesTopicSelectors($topic, $deniedTopics); |
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} |
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public static function canUpdateTopic(string $topic, Token $token, bool $privateUpdate): bool |
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{ |
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try { |
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$claim = (array) $token->getClaim('mercure'); |
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} catch (\OutOfBoundsException $e) { |
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return false; |
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} |
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$allowedTopics = $claim['publish'] ?? null; |
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$deniedTopics = $claim['publish_exclude'] ?? []; |
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// If not defined, then the publisher MUST NOT be authorized to dispatch any update |
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if (null === $allowedTopics || !\is_array($allowedTopics)) { |
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return false; |
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} |
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if (true === $privateUpdate) { |
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return self::matchesTopicSelectors($topic, $allowedTopics ?? []) |
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&& !self::matchesTopicSelectors($topic, $deniedTopics); |
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} |
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return !self::matchesTopicSelectors($topic, $deniedTopics); |
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} |
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public static function canReceiveUpdate( |
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string $topic, |
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Message $message, |
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array $subscribedTopics, |
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?Token $token, |
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bool $allowAnonymous |
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): bool { |
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if (!self::matchesTopicSelectors($topic, $subscribedTopics)) { |
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return false; |
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} |
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if (null === $token && false === $allowAnonymous) { |
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return false; |
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} |
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if (!$message->isPrivate()) { |
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return true; |
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} |
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if (null === $token) { |
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return false; |
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} |
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try { |
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$claim = (array) $token->getClaim('mercure'); |
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} catch (\OutOfBoundsException $e) { |
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return false; |
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} |
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$allowedTopics = $claim['subscribe'] ?? []; |
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$deniedTopics = $claim['subscribe_exclude'] ?? []; |
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2 |
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return self::matchesTopicSelectors($topic, $allowedTopics) |
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&& !self::matchesTopicSelectors($topic, $deniedTopics); |
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2 |
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} |
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121
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} |
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bpolaszek /
mercure-php-hub
