$listing */ public function __construct(private iterable $listing) { } /** * @param callable(T): bool $filter * * @return DirectoryListing */ public function filter(callable $filter): DirectoryListing { $generator = (static function (iterable $listing) use ($filter): Generator { foreach ($listing as $item) { if ($filter($item)) { yield $item; } } })($this->listing); return new DirectoryListing($generator); } /** * @template R * * @param callable(T): R $mapper * * @return DirectoryListing */ public function map(callable $mapper): DirectoryListing { $generator = (static function (iterable $listing) use ($mapper): Generator { foreach ($listing as $item) { yield $mapper($item); } })($this->listing); return new DirectoryListing($generator); } /** * @return DirectoryListing */ public function sortByPath(): DirectoryListing { $listing = $this->toArray(); usort($listing, function (StorageAttributes $a, StorageAttributes $b) { return $a->path() <=> $b->path(); }); return new DirectoryListing($listing); } /** * @return Traversable */ public function getIterator(): Traversable { return $this->listing instanceof Traversable ? $this->listing : new ArrayIterator($this->listing); } /** * @return T[] */ public function toArray(): array { return $this->listing instanceof Traversable ? iterator_to_array($this->listing, false) : (array) $this->listing; } }