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<?php |
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declare(strict_types=1); |
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namespace BenTools\IterableFunctions; |
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use CallbackFilterIterator; |
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use IteratorAggregate; |
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use IteratorIterator; |
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use Traversable; |
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use function array_filter; |
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use function array_map; |
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use function iterator_to_array; |
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/** |
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* @internal |
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* |
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* @template TKey |
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* @template TValue |
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* |
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* @implements IteratorAggregate<TKey, TValue> |
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*/ |
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final class IterableObject implements IteratorAggregate |
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{ |
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/** @var iterable<TKey, TValue> */ |
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private $iterable; |
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/** @param iterable<TKey, TValue> $iterable */ |
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public function __construct(iterable $iterable) |
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{ |
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$this->iterable = $iterable; |
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} |
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/** |
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* @param (callable(TValue):bool)|null $filter |
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* |
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* @return self<TKey, TValue> |
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*/ |
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public function filter(?callable $filter = null): self |
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{ |
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if ($this->iterable instanceof Traversable) { |
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$filter ??= |
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/** @param mixed $value */ |
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static function ($value): bool { |
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return (bool) $value; |
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}; |
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return new self(new CallbackFilterIterator(new IteratorIterator($this->iterable), $filter)); |
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} |
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$filtered = $filter === null ? array_filter($this->iterable) : array_filter($this->iterable, $filter); |
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return new self($filtered); |
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} |
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/** |
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* @param callable(TValue):TResult $mapper |
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* |
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* @return self<TKey, TResult> |
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* |
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* @template TResult |
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*/ |
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public function map(callable $mapper): self |
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{ |
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if ($this->iterable instanceof Traversable) { |
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return new self(new MappedTraversable($this->iterable, $mapper)); |
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} |
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return new self(array_map($mapper, $this->iterable)); |
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} |
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/** |
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* @return self<int, TValue> |
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*/ |
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public function values(): self |
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{ |
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return new self(new WithoutKeysTraversable($this->iterable)); |
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} |
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/** @return Traversable<TKey, TValue> */ |
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public function getIterator(): Traversable |
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{ |
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yield from $this->iterable; |
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} |
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/** @return array<array-key, TValue> */ |
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public function asArray(): array |
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{ |
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return $this->iterable instanceof Traversable ? iterator_to_array($this->iterable) : $this->iterable; |
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} |
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} |
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bpolaszek /
php-iterable-functions
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