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<?php |
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namespace Loevgaard\DandomainStock\Entity; |
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use Doctrine\Common\Collections\ArrayCollection; |
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use Doctrine\ORM\Mapping as ORM; |
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use Loevgaard\DandomainStock\Entity\Generated\StockMovementInterface; |
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use Loevgaard\DandomainStock\Exception\StockMovementProductMismatchException; |
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trait OrderLineTrait |
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{ |
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/** |
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* @var StockMovement[]|ArrayCollection |
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* |
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* @ORM\OneToMany(targetEntity="Loevgaard\DandomainStock\Entity\StockMovement", mappedBy="orderLine", cascade={"persist"}) |
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*/ |
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protected $stockMovements; |
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/** |
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* @param \Loevgaard\DandomainStock\Entity\Generated\StockMovementInterface $stockMovement |
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* |
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* @return OrderLineTrait |
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* |
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* @throws \Loevgaard\DandomainStock\Exception\StockMovementProductMismatchException |
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*/ |
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public function addStockMovement(StockMovementInterface $stockMovement) |
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{ |
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$this->initStockMovements(); |
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if ($this->stockMovements->count()) { |
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/** @var StockMovement $firstStockMovement */ |
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$firstStockMovement = $this->stockMovements->first(); |
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if ($stockMovement->getProduct()->getId() !== $firstStockMovement->getProduct()->getId()) { |
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throw new StockMovementProductMismatchException('The product id of the first product is `'.$firstStockMovement->getProduct()->getId().'` while the one you are adding has this id: `'.$stockMovement->getProduct()->getId().'`'); |
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} |
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} |
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if (!$this->stockMovements->contains($stockMovement)) { |
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$this->stockMovements->add($stockMovement); |
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} |
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return $this; |
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} |
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/** |
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* @return \Loevgaard\DandomainStock\Entity\StockMovement[] |
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*/ |
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public function getStockMovements() |
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{ |
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$this->initStockMovements(); |
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return $this->stockMovements; |
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} |
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/** |
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* @param \Loevgaard\DandomainStock\Entity\Generated\StockMovementInterface[] $stockMovements |
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* |
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* @return OrderLineTrait |
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* |
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* @throws \Loevgaard\DandomainStock\Exception\StockMovementProductMismatchException |
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*/ |
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public function setStockMovements($stockMovements) |
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{ |
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foreach ($stockMovements as $stockMovement) { |
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$this->addStockMovement($stockMovement); |
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} |
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return $this; |
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} |
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/** |
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* Say you have these two stock movements associated with this order line:. |
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* |
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* | qty | product | |
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* ----------------- |
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* | 1 | Jeans | |
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* | -1 | Jeans | |
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* |
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* Then the effective stock movement would be |
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* |
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* | qty | product | |
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* ----------------- |
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* | 0 | Jeans | |
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* |
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* And this is what we return in this method |
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* |
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* Returns null if the order line has 0 stock movements |
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* |
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* @return \Loevgaard\DandomainStock\Entity\Generated\StockMovementInterface|null |
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* |
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* @throws \Loevgaard\DandomainStock\Exception\CurrencyMismatchException |
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* @throws \Loevgaard\DandomainStock\Exception\UnsetCurrencyException |
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*/ |
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public function computeEffectiveStockMovement(): ?StockMovementInterface |
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{ |
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$this->initStockMovements(); |
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if (!$this->stockMovements->count()) { |
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return null; |
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} |
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/** @var StockMovementInterface $lastStockMovement */ |
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$lastStockMovement = $this->stockMovements->last(); |
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$qty = 0; |
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$stockMovement = $lastStockMovement->copy(); |
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foreach ($this->stockMovements as $stockMovement) { |
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$qty += $stockMovement->getQuantity(); |
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} |
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$stockMovement->setQuantity($qty); |
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return $stockMovement; |
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} |
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protected function initStockMovements(): void |
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{ |
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if (!is_null($this->stockMovements)) { |
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return; |
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} |
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$this->stockMovements = new ArrayCollection(); |
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} |
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} |
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In PHP traits cannot be used for type-hinting as they do not define a well-defined structure. This is because any class that uses a trait can rename that trait’s methods.
If you would like to return an object that has a guaranteed set of methods, you could create a companion interface that lists these methods explicitly.