From c7b88fd7f1333641d08faf08a33265d513a09db9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Witold=20Wi=C5=9Bniewski?=
 <58150098+daVitekPL@users.noreply.github.com>
Date: Wed, 19 Apr 2023 11:01:55 +0200
Subject: [PATCH] Buyable checks the quantity in the basket (#111)

* Buyable checks the quantity in the basket

* Fix tests
---
 src/Models/Product.php          |  2 +-
 src/Services/ProductService.php | 22 +++++++++++++++++++++-
 tests/API/CartApiTest.php       |  2 +-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/src/Models/Product.php b/src/Models/Product.php
index 7c33472..6442e62 100644
--- a/src/Models/Product.php
+++ b/src/Models/Product.php
@@ -161,7 +161,7 @@ public function getTaxRate(): float
         return $this->tax_rate ?? 0;
     }
 
-    public function getBuyableByUserAttribute(?CoreUser $user = null, int $quantity = 1): bool
+    public function getBuyableByUserAttribute(?CoreUser $user = null, ?int $quantity = null): bool
     {
         return app(ProductServiceContract::class)->productIsBuyableByUser($this, $user ?? Auth::user(), false, $quantity);
     }
diff --git a/src/Services/ProductService.php b/src/Services/ProductService.php
index 94fa206..73690f9 100644
--- a/src/Services/ProductService.php
+++ b/src/Services/ProductService.php
@@ -10,6 +10,7 @@
 use EscolaLms\Cart\Events\ProductableDetached;
 use EscolaLms\Cart\Events\ProductAttached;
 use EscolaLms\Cart\Events\ProductDetached;
+use EscolaLms\Cart\Models\Cart;
 use EscolaLms\Cart\Models\Product;
 use EscolaLms\Cart\Models\ProductProductable;
 use EscolaLms\Cart\Models\ProductUser;
@@ -203,13 +204,17 @@ public function productProductablesAllOwnedByUser(Product $product, User $user):
         return Product::where('products.id', $product->getKey())->whereDoesntHaveProductablesNotOwnedByUser($user)->exists();
     }
 
-    public function productIsBuyableByUser(Product $product, User $user, bool $check_productables = false, int $quantity = 1): bool
+    public function productIsBuyableByUser(Product $product, User $user, bool $check_productables = false, ?int $quantity = null): bool
     {
         $limit_per_user = $product->limit_per_user;
         $limit_total = $product->limit_total;
 
         $is_purchasable = $product->purchasable;
 
+        if (is_null($quantity)) {
+            $quantity = $this->productQuantityInCart($user, $product) + 1;
+        }
+
         $is_under_limit_per_user = is_null($limit_per_user) || ($product->getOwnedByUserQuantityAttribute($user) + $quantity <= $limit_per_user);
         $is_under_limit_total = is_null($limit_total) || (($product->users_count ?? $product->users()->count()) + $quantity <= $limit_total);
         $is_productables_buyable = !$check_productables || $this->productProductablesAllBuyableByUser($product, $user);
@@ -518,4 +523,19 @@ public function canDetachProductableFromUser(Productable $productable, User $use
     {
         return !$this->productableIsOwnedByUserThroughProduct($productable, $user);
     }
+
+    private function productQuantityInCart(User $user, Product $product): int
+    {
+        $cart = Cart::where('user_id', $user->getAuthIdentifier())->latest()->firstOrCreate([
+            'user_id' => $user->getAuthIdentifier(),
+        ]);
+        if (!is_null($cart)) {
+            $cartItem = $cart
+                ->items()
+                ->whereHas('buyable', fn (Builder $query) => $query->where('products.id', '=', $product->getKey()))
+                ->first();
+            return !is_null($cartItem) ? $cartItem->quantity : 0;
+        }
+        return 0;
+    }
 }
diff --git a/tests/API/CartApiTest.php b/tests/API/CartApiTest.php
index cf49c6d..32488d4 100644
--- a/tests/API/CartApiTest.php
+++ b/tests/API/CartApiTest.php
@@ -381,7 +381,7 @@ public function test_added_more_than_limit_per_user()
         );
 
         $this->response = $this->actingAs($user, 'api')->json('GET', '/api/cart');
-        $this->response->assertCreated();
+        $this->response->assertOk();
         $this->response->assertJson(
             fn (AssertableJson $json) =>
             $json