feat(checkout): enhance cancellation logic to handle unavailable variants and update cart status

app/Domains/Purchase/Services/Checkout/ReleaseCheckoutService.php

@@ -3,6 +3,7 @@
 namespace App\Domains\Purchase\Services\Checkout;
 
 use App\Domains\Cart\Models\Cart;
+use App\Domains\Cart\Models\CartItem;
 use App\Domains\Catalog\Models\StockReservation;
 use App\Domains\Catalog\Services\StockReservationService;
 use App\Domains\Purchase\Exceptions\PurchaseExpiredException;
@@ -91,7 +92,16 @@ class ReleaseCheckoutService
                     Purchase::STATUS_CREATED,
                     Purchase::STATUS_PENDING_PAYMENT,
                 ], true)) {
-                $this->reservations->returnToCart($purchase, $cart);
+                if ($this->hasUnavailableVariants($cart)) {
+                    $this->releasePurchaseReservations($purchase, $targetStatus, $cart);
+                    $cart->update([
+                        'status' => Cart::STATUS_EXPIRED,
+                        'current_purchase_id' => null,
+                        'current_stock_reservation_id' => null,
+                    ]);
+                } else {
+                    $this->reservations->returnToCart($purchase, $cart);
+                }
                 $purchase->update(['status' => Purchase::STATUS_CANCELLED]);
 
                 return $this->loadPurchase($purchase);
@@ -115,6 +125,17 @@ class ReleaseCheckoutService
         });
     }
 
+    private function hasUnavailableVariants(Cart $cart): bool
+    {
+        return $cart->items()
+            ->whereNotNull('variant_id')
+            ->with(['variant.eventDate', 'variant.eventDates'])
+            ->lockForUpdate()
+            ->get()
+            ->contains(fn (CartItem $item): bool => $item->variant === null
+                || ! $item->variant->isSellable());
+    }
+
     private function releasePurchaseReservations(
         Purchase $purchase,
         string $targetStatus,