bebeboutik-api/app/Web/Controllers/CartController.php

<?php

namespace App\Web\Controllers;

use App\Models\Carrier;
use Antadis\API\Front\Web\Controllers\CartController as BaseCartController;
use Illuminate\Http\Request;

use ApiProductCart;
use ApiTools;

class CartController extends BaseCartController
{

    public function get(Request $request) {
        return parent::get($request);
    }

    protected function checkProductToAdd($productToAdd, $id_product_attribute, $quantity) {
        if (($error = parent::checkProductToAdd($productToAdd, $id_product_attribute, $quantity)) === true) {
            $current_sale = array();
            foreach (static::$_cart->getProducts() as $product) {
                $sale = \Sale::getSaleFromCategory((int)$product['id_category_default'], false);
                $current_sale = array(
                    'id_sale'=> (int) $sale->id,
                    'delivery_delay'=> (int) $sale->delivery_delay,
                    'shipping' => \Sale::getShippingSale((int)$sale->id)
                );
                // Only one delivery id per cart, so we can break now
                break;
            }
            $current_product = $productToAdd;
            $sale2 = \Sale::getSaleFromCategory($current_product->id_category_default, false);
            $adding_sale = array(
                'id_sale'=> (int) $sale2->id,
                'delivery_delay'=> (int) $sale2->delivery_delay,
                'shipping' => \Sale::getShippingSale((int)$sale2->id)
            );

            if (!empty($current_sale)) {
                if ((int)$current_sale['delivery_delay'] == 1 && !\Sale::isCombinable($current_sale,$adding_sale)){
                    return ApiTools::displayError('Sorry your cart already contains products from a sale shipped within 3 weeks. To continue, please confirm your order or empty your cart.', false);
                } elseif (!\Sale::isCombinable($current_sale,$adding_sale)){
                    return ApiTools::displayError('Sorry your cart already contains products from a sale shipped within a special period. To continue, please confirm your order or empty your cart.', false);
                }
            }
        }
        return true;
    }
}