PHP code example of missionx-co / discounts-engine

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

missionx-co / discounts-engine example snippets

$items = [
    new Item(id: 1, name: 'Item 1', qty: 1, price: 100, type: 'product'),
    new Item(id: 2, name: 'Item 1', qty: 2, price: 50, type: 'product'),
    new Item(id: 3, name: 'Item 1', qty: 1, price: 5, type: 'shipping'),
];

    (new Discount)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )
    

    use MissionX\DiscountsEngine\Enums\DiscountPriority;

    (new Discount)
        ->priority(DiscountPriority::High)
    

    (new Discount)->minPurchaseAmount(50)
    

    (new Discount)->minQty(4)
    

    (new Discount)->combineWithOtherDiscounts()
    

    (new Discount)->forceCombineWithOtherDiscounts()
    

    (new Discount)->setIsAutomatic()
    

use MissionX\DiscountsEngine\Enums\DiscountType;

// the following configuration will be applied to all applicable items
(new AmountOffProductDiscount)
    ->amount(10)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )

// the following configuration will be applied to item with id=2 only
(new AmountOffProductDiscount)
    ->amount(10, DiscountType::FixedAmount)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )
    ->minPurchaseAmount(200)
    ->selectAffectedItemsUsing(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->id == 2
        )
    )

(new AmountOffOrderDiscount)
    ->amount(5)
    ->minPurchaseAmount(200)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )

(new BuyXGetAmountOffOfYDiscount())
    ->amount(50, DiscountType::Percentage)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )
    ->hasX(
        fn (array $applicableItems) => array_filter(
            $applicableItems,
            fn(Item $item) => $item->id == 2 && $item->qty == 2
        )
    )
    ->getY(fn(array $applicableItems, array $items, Discount $discount) => [new YItem(itemId: 1, qty: 1)])

(new BuyXGetAmountOffOfYDiscount())
    ->amount(100, DiscountType::Percentage)
    ->limitToItems(
        fn (array $items) => array_filter(
            $items,
            fn (Item $item) => $item->type == 'product'
        )
    )
    ->minPurchaseAmount(200)
    ->getY(fn(array $applicableItems, array $items, Discount $discount) => [new YItem(3)])

$discount = (new AmountOffOrderDiscount())->amount(20);
$discount2 = (new AmountOffOrderDiscount())->amount(10)->forceCombineWithOtherDiscounts();
$discount3 = (new AmountOffOrderDiscount())->amount(30)->combineWithOtherDiscounts();
// won't be applied because min purcahse amount is greater than the total amount
$discount4 = (new AmountOffOrderDiscount())->amount(20)->forceCombineWithOtherDiscounts()->minPurchaseAmount(300);

$group = (new DiscountsEngine)
    ->addDiscount($twentyPercentOff)
    ->addDiscount($twentyPercentOffLimited)
    ->addDiscount($amountOffProduct)
    ->process($this->items());

$group->savings(); // 82 (10% + 30%)