Create a new cart if current cart is not active/has been paid

src/components/organisms/Cart.svelte

@@ -23,9 +23,31 @@
             })
             if (existantCart.ok) {
                 const cart = await existantCart.json()
-                $cartId = cart.id
-                $cartData = cart
                 // console.log('Fetched existant cart:', $cartId, $cartData)
+
+                // Cart is active / has not been ordered
+                if (cart.active || !cart.order_id) {
+                    // Keep current cart
+                    $cartId = cart.id
+                    $cartData = cart
+                }
+
+                // Cart is inactive / has been ordered
+                else {
+                    // Fetch a new cart
+                    const newCart = await fetch('/api/swell', {
+                        method: 'POST',
+                        body: JSON.stringify({
+                            action: 'createCart'
+                        })
+                    })
+                    if (newCart.ok) {
+                        const cart = await newCart.json()
+                        // Save new cart
+                        $cartId = cart.id
+                        $cartData = cart
+                    }
+                }
             }
         }
         // Cart doesn't exists