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<?php
namespace PayPal\Checkout\Orders;
use PayPal\Checkout\Concerns\CastsToJson;
use PayPal\Checkout\Concerns\HasCollection;
use PayPal\Checkout\Contracts\Arrayable;
use PayPal\Checkout\Contracts\Jsonable;
use PayPal\Checkout\Exceptions\MultiCurrencyOrderException;
/**
* https://developer.paypal.com/docs/api/orders/v2/#definition-purchase_unit.
*/
class PurchaseUnit implements Arrayable, Jsonable
{
use CastsToJson;
use HasCollection;
/**
* The total order Amount with an optional breakdown that provides details,
* such as the total item Amount, total tax Amount, shipping, handling, insurance,
* and discounts, if any.
*
* @var AmountBreakdown
*/
protected AmountBreakdown $amount;
/**
* An array of items that the customer purchases from the merchant.
*
* @var Item[]
*/
protected array $items = [];
/**
* Create a new collection.
*/
public function __construct(AmountBreakdown $amount)
{
$this->amount = $amount;
}
/**
* push a new item into items array.
* @param Item[] $items
* @return PurchaseUnit
* @throws MultiCurrencyOrderException
*/
public function addItems(array $items): self
{
foreach ($items as $item) {
$this->addItem($item);
}
return $this;
}
/**
* push a new item into items array.
* @param Item $item
* @return PurchaseUnit
* @throws MultiCurrencyOrderException
*/
public function addItem(Item $item): self
{
if ($item->getAmount()->getCurrencyCode() != $this->amount->getCurrencyCode()) {
throw new MultiCurrencyOrderException();
}
$this->items[] = $item;
return $this;
}
/**
* return's purchase unit items.
* @return array
*/
public function getItems(): array
{
return $this->items;
}
/**
* return's the purchase unit amount breakdown.
* @return AmountBreakdown
*/
public function getAmount(): AmountBreakdown
{
return $this->amount;
}
/**
* convert a purchase unit instance to array.
* @return array
*/
public function toArray(): array
{
return [
'amount' => $this->amount->toArray(),
'items' => array_map(
fn(Item $item) => $item->toArray(),
$this->items
),
];
}
}