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<?php |
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declare(strict_types=1); |
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namespace Stratadox\EntityState\Internal; |
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use function array_merge as add; |
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use function array_search as search; |
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use function get_class as classOf; |
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use function gettype as typeOf; |
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use function in_array as has; |
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use function is_object as isObject; |
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/** |
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* Visited list. |
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* |
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* @internal |
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* @author Stratadox |
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*/ |
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final class Visited |
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{ |
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private $visited; |
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private $paths; |
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private function __construct(array $visited, array $paths) |
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{ |
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$this->visited = $visited; |
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$this->paths = $paths; |
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} |
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/** |
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* Produces an empty visited list. |
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* |
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* @return Visited The empty visited list. |
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*/ |
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public static function noneYet(): Visited |
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{ |
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return new Visited([], []); |
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} |
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/** |
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* Checks whether the value is already on the list. |
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* |
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* @param mixed $value The value to check for. |
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* @return bool Whether the value is on the list. |
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*/ |
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public function already($value): bool |
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{ |
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return has($value, $this->visited, true); |
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} |
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/** |
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* Retrieves the name associated with the visited value. |
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* |
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* @param mixed $value The value to find the property name for. |
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* @return string The name associated with the value. |
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*/ |
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public function name($value): string |
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{ |
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return $this->paths[search($value, $this->visited)]; |
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} |
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/** |
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* Adds the value to the list of visited values. |
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* |
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* Also keeps a note on where to find it. |
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* |
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* @param mixed $value The value to mark as visited. |
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* @param Name $name The name of the visited property. |
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* @return Visited The updated visited list. |
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*/ |
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public function add($value, Name $name): Visited |
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{ |
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return new Visited( |
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add($this->visited, [$value]), |
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add($this->paths, [sprintf( |
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'%s:%s', |
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isObject($value) ? classOf($value) : typeOf($value), |
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$name |
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)]) |
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); |
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} |
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} |
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Stratadox /
EntityState
