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<?php |
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namespace Smoren\EventRouter\Components; |
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use Smoren\EventRouter\Interfaces\EventConfigInterface; |
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use Smoren\EventRouter\Interfaces\EventInterface; |
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/** |
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* Map for storing event route rules |
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*/ |
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class EventRouterMap |
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{ |
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/** |
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* @var array<string, array<array{EventConfigInterface, callable}>> |
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* [origin => [[config, handler], ...], ...] |
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*/ |
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protected array $originMap = []; |
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/** |
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* @var array<string, array<string, array<array{EventConfigInterface, callable}>>> |
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* [origin => [name => [[config, handler], ...], ...], ...] |
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*/ |
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protected array $originNameMap = []; |
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/** |
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* Adds new event router rule to map |
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* @param EventConfigInterface $config |
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* @param callable $handler |
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* @return void |
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*/ |
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public function add(EventConfigInterface $config, callable $handler): void |
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{ |
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[$origin, $name] = [$config->getOrigin(), $config->getName()]; |
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if($name === null) { |
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if(!isset($this->originMap[$origin])) { |
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$this->originNameMap[$origin] = []; |
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} |
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$this->originMap[$origin][] = [$config, $handler]; |
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} else { |
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if(!isset($this->originNameMap[$origin])) { |
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$this->originNameMap[$origin] = []; |
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} |
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if(!isset($this->originNameMap[$origin][$name])) { |
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$this->originNameMap[$origin][$name] = []; |
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} |
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$this->originNameMap[$origin][$name][] = [$config, $handler]; |
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} |
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} |
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/** |
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* Returns suitable handlers from map for event |
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* @param EventInterface $event |
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* @return callable[] |
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*/ |
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public function get(EventInterface $event): array |
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{ |
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$handlers = []; |
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/** |
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* @var EventConfigInterface $config |
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* @var callable $handler |
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*/ |
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foreach($this->originMap[$event->getOrigin()] ?? [] as [$config, $handler]) { |
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if(!$this->hasRecipientsIntersection($config, $event)) { |
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continue; |
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} |
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if(!$this->applyExtraFilter($config, $event)) { |
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continue; |
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} |
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$handlers[] = $handler; |
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} |
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foreach($this->originNameMap[$event->getOrigin()][$event->getName()] ?? [] as [$config, $handler]) { |
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if(!$this->hasRecipientsIntersection($config, $event)) { |
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continue; |
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} |
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if(!$this->applyExtraFilter($config, $event)) { |
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continue; |
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} |
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$handlers[] = $handler; |
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} |
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return $handlers; |
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} |
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/** |
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* Returns true if config condition and event have intersection by recipients |
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* @param EventConfigInterface $config route config condition |
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* @param EventInterface $event event |
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* @return bool |
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*/ |
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protected function hasRecipientsIntersection(EventConfigInterface $config, EventInterface $event): bool |
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{ |
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$candidates = $config->getRecipients(); |
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if($candidates === null) { |
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return true; |
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} |
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$recipients = $event->getRecipients(); |
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return (bool)count(array_intersect($candidates, $recipients)); |
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} |
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/** |
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* Returns result of extra filter call for event |
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* @param EventConfigInterface $config route config condition |
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* @param EventInterface $event event |
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* @return bool |
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*/ |
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protected function applyExtraFilter(EventConfigInterface $config, EventInterface $event): bool |
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{ |
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return ($filter = $config->getExtraFilter()) === null || $filter($event); |
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} |
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} |
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