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EventCentric Business Rules
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<?php | |
final class Basket implements RecordsEvents | |
{ | |
private $basketCanOnlyContainFiveProducts; | |
private function __construct() | |
{ | |
$this->basketCanOnlyContainFiveProducts = new BasketCanOnlyContainFiveProducts(); | |
} | |
private function whenBasketWasPickedUp(BasketWasPickedUp $event) | |
{ | |
$this->basketCanOnlyContainFiveProducts->basketWasPickedUp(); | |
} | |
private function whenProductWasAddedToBasket(ProductWasAddedToBasket $event) | |
{ | |
$this->basketCanOnlyContainFiveProducts->productWasAddedToBasket(); | |
} | |
private function whenProductWasRemovedFromBasket(ProductWasRemovedFromBasket $event) | |
{ | |
$this->basketCanOnlyContainFiveProducts->productWasRemovedFromBasket(); | |
} | |
public static function pickUp(BasketId $basketId) | |
{ | |
$basket = new Basket($basketId); | |
$basket->recordThat(new BasketWasPickedUp($basketId)); | |
return $basket; | |
} | |
public function addProduct(ProductId $productId, $name) | |
{ | |
$this->basketCanOnlyContainFiveProducts->tryToAddProductToBasket(); | |
$this->recordThat( | |
new ProductWasAddedToBasket($this->basketId, $productId, $name) | |
); | |
} | |
public function removeProduct(ProductId $productId) | |
{ | |
$this->recordThat( | |
new ProductWasRemovedFromBasket($this->basketId, $productId) | |
); | |
} | |
} |
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$this->basketCanOnlyContainFiveProducts->tryToAdd(2);
would be more verbose