Merge pull request #2 from PaoloTozzi/1.x

Add methods to remove items and empty the cart

README.md

@@ -138,6 +138,54 @@ $cart = Cart::query()->firstOrCreate(['user_id' => $user->id]);
 $cart->storeItems($items);
 ```
 
+### Delete Item From Cart
+
+If you may to delete an item for a cart, you can use `removeItem` method:
+
+```php
+$items = [
+    [
+        'itemable' => $product1,
+        'quantity' => 2,
+    ],
+    [
+        'itemable' => $product2,
+        'quantity' => 1,
+    ],
+    [
+        'itemable' => $product3,
+        'quantity' => 5,
+    ],
+];
+
+$cart = Cart::query()->firstOrCreate(['user_id' => $user->id]);
+$cart->removeItem($product1);
+```
+
+### Delete All Items From Cart
+
+If you may to delete all items from a cart, you can use `emptyCart` method:
+
+```php
+$items = [
+    [
+        'itemable' => $product1,
+        'quantity' => 2,
+    ],
+    [
+        'itemable' => $product2,
+        'quantity' => 1,
+    ],
+    [
+        'itemable' => $product3,
+        'quantity' => 5,
+    ],
+];
+
+$cart = Cart::query()->firstOrCreate(['user_id' => $user->id]);
+$cart->emptyCart();
+```
+
 <a name="contributors"></a>
 ## Contributors
 

src/Models/Cart.php

@@ -65,6 +65,36 @@ public function scopeFirstOrCreateWithStoreItems(
         return $query;
     }
 
+    /**
+     * Scope remove item from cart.
+     */
+    public function scopeRemoveItem(Builder $query, Model $item): Builder
+    {
+        $this->items()->delete($item->getKey());
+
+        return $query;
+    }
+
+    /**
+     * Scope remove item from cart by id.
+     */
+    public function scopeRemoveItemById(Builder $query, int $id): Builder
+    {
+        $this->items()->delete($id);
+
+        return $query;
+    }
+
+    /**
+     * Scope remove item from cart by id.
+     */
+    public function scopeEmptyItems(Builder $query): Builder
+    {
+        $this->items()->delete();
+
+        return $query;
+    }
+
     // Methods
 
     /**
@@ -95,4 +125,28 @@ public function storeItems(array $items): Cart
 
         return $this;
     }
+
+    /**
+     * Remove a single item from the cart
+     */
+    public function removeItem(Model $item): Cart
+    {
+        $itemToDelete = $this->items()->find($item->getKey());
+
+        if ($itemToDelete) {
+            $itemToDelete->delete();
+        }
+
+        return $this;
+    }
+
+    /**
+     * Remove every item from the cart
+     */
+    public function emptyCart(): Cart
+    {
+        $this->items()->delete();
+
+        return $this;
+    }
 }

tests/Feature/CartDeleteTest.php

@@ -0,0 +1,97 @@
+<?php
+
+use Binafy\LaravelCart\Models\Cart;
+use Binafy\LaravelCart\Models\CartItem;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Artisan;
+use Tests\SetUp\Models\Product;
+use Tests\SetUp\Models\User;
+use function Pest\Laravel\assertDatabaseCount;
+use function Pest\Laravel\assertDatabaseHas;
+use function PHPUnit\Framework\assertInstanceOf;
+
+/*
+ * Use `RefreshDatabase` for delete migration data for each test.
+ */
+uses(RefreshDatabase::class);
+
+test('can remove an item from the cart', function () {
+    $user = User::query()->create(['name' => 'Milwad', 'email' => 'milwad.dev@gmail.comd']);
+    $product1 = Product::query()->create(['title' => 'Product 1']);
+    $product2 = Product::query()->create(['title' => 'Product 2']);
+    $product3 = Product::query()->create(['title' => 'Product 3']);
+    $product4 = Product::query()->create(['title' => 'Product 4']);
+
+    $items = [
+        [
+            'itemable' => $product1,
+            'quantity' => 2,
+        ],
+        [
+            'itemable' => $product2,
+            'quantity' => 1,
+        ],
+        [
+            'itemable' => $product3,
+            'quantity' => 5,
+        ],
+        [
+            'itemable' => $product4,
+            'quantity' => 3,
+        ],
+    ];
+
+    // Store items to cart
+    $cart = Cart::query()->firstOrCreate(['user_id' => $user->id]);
+    $cart->storeItems($items);
+
+    // Delete Item from cart
+    $cart->removeItem($product1);
+
+    // DB Assertions
+    assertDatabaseCount('carts', 1);
+    assertDatabaseCount('cart_items', 3);
+
+    $cart->removeItem($product2);
+    assertDatabaseCount('cart_items', 2);
+
+    $cart->removeItem($product1);
+    assertDatabaseCount('cart_items', 2);
+});
+
+test('can empty the cart', function() {
+    $user = User::query()->create(['name' => 'Milwad', 'email' => 'milwad.dev@gmail.comd']);
+    $product1 = Product::query()->create(['title' => 'Product 1']);
+    $product2 = Product::query()->create(['title' => 'Product 2']);
+    $product3 = Product::query()->create(['title' => 'Product 3']);
+    $product4 = Product::query()->create(['title' => 'Product 4']);
+
+    $items = [
+        [
+            'itemable' => $product1,
+            'quantity' => 2,
+        ],
+        [
+            'itemable' => $product2,
+            'quantity' => 1,
+        ],
+        [
+            'itemable' => $product3,
+            'quantity' => 5,
+        ],
+        [
+            'itemable' => $product4,
+            'quantity' => 3,
+        ],
+    ];
+
+    // Store items to cart
+    $cart = Cart::query()->firstOrCreate(['user_id' => $user->id]);
+    $cart->storeItems($items);
+
+    assertDatabaseCount('cart_items', 4);
+
+    // Remove all items from cart
+    $cart->emptyCart();
+    assertDatabaseCount('cart_items', 0);
+});