ekart/backend/app/Data/ProductDTO.php

<?php

namespace App\Data;

use App\Contracts\OutputDataTransferObject;
use App\Models\Product;
use App\Models\ProductImage;

final readonly class ProductDTO implements OutputDataTransferObject
{
    /**
     * @param  ProductImageDTO[]  $productImages
     */
    public function __construct(
        public int $id,
        public string $title,
        public string $description,
        public int $actualPrice,
        public int $listPrice,
        public ProductCategoryDTO $category,
        public array $productImages,
    ) {}

    /**
     * @return array<string, mixed>
     */
    public function toArray(): array
    {
        return [
            'id' => $this->id,
            'title' => $this->title,
            'description' => $this->description,
            'actualPrice' => $this->actualPrice,
            'listPrice' => $this->listPrice,
            'category' => $this->category->toArray(),
            'productImage' => array_map(fn (ProductImageDTO $productImage) => $productImage->toArray(),
                $this->productImages),
        ];
    }

    public static function fromModel(Product $product): self
    {
        return new self(
            id: $product->id,
            title: $product->title,
            description: $product->description,
            actualPrice: $product->actual_price,
            listPrice: $product->list_price,
            category: ProductCategoryDTO::fromModel($product->category),
            productImages: $product->images->map(fn (ProductImage $productImage) => ProductImageDTO::fromModel($productImage))->all(),
        );
    }
}