refactor(stock): centralize reservation aggregate

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

@@ -169,21 +169,31 @@ class StartCheckoutService
                 'cantidad' => $line['quantity'],
             ]);
 
-            try {
-                $this->reservations->reserve($cartItem, $line['selection'], $line['quantity']);
-            } catch (\InvalidArgumentException) {
-                $availableQuantity = $this->inventory->availableQuantity($line['selection']) ?? 0;
-
-                throw new InsufficientStockException([
-                    $this->unavailableItem($line, $availableQuantity),
-                ]);
-            }
-
             $cartItem->setRelation('catalogItem', $line['catalog_item']);
             $cartItem->setRelation('variant', $line['selection'] instanceof Variant ? $line['selection'] : null);
             $cartItems->push($cartItem);
         }
 
+        try {
+            $this->reservations->syncCart($cart);
+        } catch (\InvalidArgumentException) {
+            $unavailable = $resolvedLines
+                ->map(function (array $line): ?array {
+                    $availableQuantity = $this->inventory->availableQuantity($line['selection']);
+
+                    return $availableQuantity !== null && $availableQuantity < $line['quantity']
+                        ? $this->unavailableItem($line, $availableQuantity)
+                        : null;
+                })
+                ->filter()
+                ->values()
+                ->all();
+
+            throw new InsufficientStockException($unavailable !== [] ? $unavailable : [
+                $this->unavailableItem($resolvedLines->first(), 0),
+            ]);
+        }
+
         $purchase = $this->createPurchase(
             $tenant,
             $userId,
@@ -194,19 +204,12 @@ class StartCheckoutService
             $cart->getKey(),
         );
         $cart->update(['current_purchase_id' => $purchase->getKey()]);
+        $this->reservations->attachToPurchase($cart, $purchase);
 
         $cartItems = $cart->items()->orderBy('id')->lockForUpdate()->get();
         $this->loadCartItems($cartItems);
         $purchase->items()->createMany($this->snapshots->fromCartItems($cartItems));
 
-        foreach ($cartItems as $index => $cartItem) {
-            $this->reservations->attachToPurchase(
-                $cartItem,
-                $resolvedLines->get($index)['selection'],
-                $purchase,
-            );
-        }
-
         return $this->loadPurchase($purchase);
     }
 
@@ -257,6 +260,7 @@ class StartCheckoutService
         $this->verifyTenantItems($tenant, $cartItems);
         $this->assertCartPurchaseLimits($tenant, $userId, $cartItems, $cart->getKey());
         $cart->setRelation('items', $cartItems);
+        $this->reservations->syncCart($cart);
 
         $purchase = $this->createPurchase(
             $tenant,
@@ -266,16 +270,9 @@ class StartCheckoutService
             $cart->getKey(),
         );
         $cart->update(['current_purchase_id' => $purchase->getKey()]);
+        $this->reservations->attachToPurchase($cart, $purchase);
         $purchase->items()->createMany($this->snapshots->fromCartItems($cartItems));
 
-        foreach ($cartItems as $cartItem) {
-            $this->reservations->attachToPurchase(
-                $cartItem,
-                $cartItem->selectedItem(),
-                $purchase,
-            );
-        }
-
         return $this->loadPurchase($purchase);
     }
 
@@ -320,6 +317,14 @@ class StartCheckoutService
                 'status' => Purchase::STATUS_SUPERSEDED,
                 'expires_at' => null,
             ]);
+            $this->reservations->releaseForPurchase(
+                $currentPurchase,
+                reason: StockReservationService::REASON_PURCHASE_SUPERSEDED,
+            );
+            $cart->update([
+                'current_purchase_id' => null,
+                'current_stock_reservation_id' => null,
+            ]);
         }
 
         return $cart;