update method canBuy, add Customer

Author: Babichev Maxim

src/Interfaces/Product.php

@@ -6,9 +6,11 @@ interface Product extends Wallet
 {
 
     /**
+     * @param Customer $customer
+     *
      * @return bool
      */
-    public function canBuy(): bool;
+    public function canBuy(Customer $customer): bool;
 
     /**
      * @return int

src/Traits/CanBePaid.php

@@ -7,7 +7,6 @@
 use Bavix\Wallet\Models\Transfer;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\ModelNotFoundException;
-use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Support\Facades\DB;
 
 trait CanBePaid
@@ -22,7 +21,7 @@ trait CanBePaid
      */
     public function pay(Product $product): Transfer
     {
-        if (!$product->canBuy()) {
+        if (!$product->canBuy($this)) {
             throw new ProductEnded('The product is out of stock');
         }