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<?php |
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declare(strict_types=1); |
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namespace AlecRabbit\Spinner\Core; |
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use AlecRabbit\Spinner\Contract\IFrame; |
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use AlecRabbit\Spinner\Core\Contract\IFrameCollection; |
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use AlecRabbit\Spinner\Exception\InvalidArgument; |
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use AlecRabbit\Spinner\Exception\LogicException; |
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use ArrayObject; |
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use Traversable; |
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/** |
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* @template T of IFrame |
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* |
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* @extends ArrayObject<int,T> |
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* |
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* @implements IFrameCollection<T> |
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*/ |
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final class FrameCollection extends ArrayObject implements IFrameCollection |
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{ |
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private const COLLECTION_IS_EMPTY = 'Collection is empty.'; |
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/** |
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* @throws InvalidArgument |
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*/ |
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public function __construct(Traversable $frames) |
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{ |
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parent::__construct(); |
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$this->initialize($frames); |
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self::assertIsNotEmpty($this); |
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} |
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/** |
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* @throws InvalidArgument |
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*/ |
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private function initialize(Traversable $frames): void |
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{ |
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/** |
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* @var T $frame |
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*/ |
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foreach ($frames as $frame) { |
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self::assertFrame($frame); |
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$this->append($frame); |
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} |
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} |
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/** |
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* @throws InvalidArgument |
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*/ |
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private static function assertFrame(mixed $frame): void |
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{ |
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if (!$frame instanceof IFrame) { |
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throw new InvalidArgument( |
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sprintf( |
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'"%s" expected, "%s" given.', |
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IFrame::class, |
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get_debug_type($frame) |
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) |
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); |
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} |
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} |
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private static function assertIsNotEmpty(IFrameCollection $collection): void |
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{ |
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if ($collection->count() === 0) { |
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throw new InvalidArgument(self::COLLECTION_IS_EMPTY); |
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} |
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} |
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public function lastIndex(): int |
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{ |
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$index = array_key_last($this->getArrayCopy()); |
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// @codeCoverageIgnoreStart |
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if ($index === null) { |
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// should not be thrown |
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throw new LogicException(self::COLLECTION_IS_EMPTY); |
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} |
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// @codeCoverageIgnoreEnd |
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return $index; |
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} |
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public function get(int $index): IFrame |
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{ |
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return $this->offsetGet($index); |
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} |
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} |
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alecrabbit /
php-console-spinner
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