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<?php |
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namespace Simara\Cart\Domain\Cart; |
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use Doctrine\Common\Collections\ArrayCollection; |
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use Doctrine\Common\Collections\Collection; |
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use Simara\Cart\Domain\Price; |
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use Simara\Cart\Domain\Prices\Prices; |
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final class Cart |
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{ |
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/** |
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* @var Collection<int, Item> |
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*/ |
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private $items; |
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public function __construct(private string $id) |
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{ |
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$this->items = new ArrayCollection(); |
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} |
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public function add(string $productId, int $amount = 1): void |
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{ |
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try { |
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$item = $this->find($productId); |
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$item->add($amount); |
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} catch (ProductNotInCartException) { |
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$this->items->add(new Item($productId, $amount)); |
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} |
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} |
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/** |
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* @throws ProductNotInCartException |
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*/ |
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public function remove(string $productId): void |
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{ |
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$key = $this->findKey($productId); |
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$this->items->remove($key); |
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} |
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/** |
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* @throws ProductNotInCartException |
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*/ |
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public function changeAmount(string $productId, int $amount): void |
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{ |
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$item = $this->find($productId); |
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$item->changeAmount($amount); |
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} |
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public function calculate(Prices $prices): CartDetail |
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{ |
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$detailItems = $this->items->map(fn(Item $item): ItemDetail => $item->toDetail($prices))->getValues(); |
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$itemPrices = $this->items->map(fn(Item $item): Price => $item->calculatePrice($prices))->getValues(); |
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$totalPrice = Price::sum($itemPrices); |
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return new CartDetail($detailItems, $totalPrice); |
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} |
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/** |
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* @throws ProductNotInCartException |
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*/ |
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private function find(string $productId): Item |
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{ |
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foreach ($this->items as $item) { |
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if ($item->getProductId() === $productId) { |
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return $item; |
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} |
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} |
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throw new ProductNotInCartException(); |
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} |
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/** |
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* @throws ProductNotInCartException |
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*/ |
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private function findKey(string $productId): int |
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{ |
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foreach ($this->items as $key => $item) { |
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if ($item->getProductId() === $productId) { |
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return $key; |
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} |
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} |
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throw new ProductNotInCartException(); |
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} |
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public function getId(): string |
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{ |
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return $this->id; |
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} |
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} |
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simara-svatopluk /
cart
