All functionalities connected with shopping cart was added. All based…

… on AJAX calls, to add and delete from cart, dynamic displaying number of products in cart. Improvements in appearance and also refactoring

app/Cart.php

@@ -6,13 +6,81 @@
 
 class Cart extends Model
 {
-    public function user()
+    public $products = array();
+    public $totalQuantity = 0;
+    public $totalPrice = 0;
+
+    /**
+     * Cart constructor.
+     */
+    public function __construct($oldCart)
     {
-        return $this->belongsTo('App\User');
+        if ($oldCart){
+            $this->products = $oldCart->products;
+            $this->totalQuantity = $oldCart->totalQuantity;
+            $this->totalPrice = $oldCart->totalPrice;
+        }
     }
 
-    public function items()
-    {
-        return $this->hasMany('App\Item');
+    public function addProduct($product){
+
+        $storedProduct = ['id' => 0, 'quantity' => 0, 'price' => $product->price, 'product' => $product];
+
+        /**
+         * Only one user can add one product to cart. Later he will decide how many items choose
+         */
+        if ($this->products){
+
+            if (!array_key_exists($product->id, $this->products)){
+                $storedProduct['id'] = $product->id;
+                $storedProduct['quantity']++;
+                $storedProduct['price'] = $product->price * $storedProduct['quantity'];
+                $this->products[$product->id] = $storedProduct;
+                $this->totalQuantity++;
+                $this->totalPrice += $product->price;
+            }
+        }
+        else{
+
+            /**
+             * Add first product to cart
+             */
+            $storedProduct['id'] = $product->id;
+            $storedProduct['quantity']++;
+            $storedProduct['price'] = $product->price * $storedProduct['quantity'];
+            $this->products[$product->id] = $storedProduct;
+            $this->totalQuantity++;
+            $this->totalPrice += $product->price;
+        }
+    }
+
+    public function deleteProduct($product){
+
+        if ($this->products){
+
+            if (count($this->products) == 1){
+                if ($product->id == array_first($this->products)['id']){
+                    unset($this->products[$product->id]);
+                    $this->totalQuantity--;
+                    $this->totalPrice -= $product->price;
+                }
+            }
+            else{
+                if (array_key_exists($product->id, $this->products)){
+                    unset($this->products[$product->id]);
+                    $this->totalQuantity--;
+                    $this->totalPrice -= $product->price;
+                }
+            }
+        }
+    }
+
+    public function setProductsQuantity($products_id, $newQuantity){
+
+        foreach ($products_id as $product_id){
+            if (array_key_exists($product_id, $this->products)){
+                $this->products[$product_id]['quantity'] = $newQuantity;
+            }
+        }
     }
 }

app/Http/Controllers/CartController.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Cart;
+use App\Item;
+use App\Product;
+use Illuminate\Http\Request;
+use Session;
+
+class CartController extends Controller
+{
+
+    public function showProducts() {
+
+        if (!Session::has('cart')){
+            return view('cart');
+        }
+        $oldCart = Session::get('cart');
+        $cart = new Cart($oldCart);
+        return view('cart', ['products' => $cart->products, 'totalPrice' => $cart->totalPrice, 'totalQuantity' => $cart->totalQuantity]);
+
+    }
+
+    /*
+     * AJAX request
+     */
+    public function addProduct(Product $product, Request $request) {
+
+        $oldCart = $request->session()->has('cart') ? $request->session()->get('cart') : null;
+
+        $cart = new Cart($oldCart);
+
+        $cart->addProduct($product);
+
+        $request->session()->put('cart', $cart);
+
+        /*
+         * To have essential data in ajax request
+         */
+        return response()->json($product);
+    }
+
+    /*
+     * AJAX request
+     */
+    public function deleteProduct(Product $product, Request $request) {
+
+        $oldCart = $request->session()->has('cart') ? $request->session()->get('cart') : null;
+
+        $cart = new Cart($oldCart);
+
+        $cart->deleteProduct($product);
+
+        $request->session()->put('cart', $cart);
+
+        return response()->json($product);
+    }
+}

app/Http/Controllers/UserController.php

@@ -21,12 +21,6 @@ public function showSettings(User $user){
 
     }
 
-    public function showItemsInCart(User $user){
-
-        $items = $user->cart->items;
-        return view('users.cart', compact('items'));
-    }
-
     public function updateName(User $user, Request $request){
 
         /*

app/Product.php

@@ -10,4 +10,9 @@ public function subcategory()
     {
         return $this->belongsTo('App\Subcategory');
     }
+
+    public function items()
+    {
+        return $this->hasMany('App\Item');
+    }
 }

app/User.php

@@ -27,11 +27,6 @@ class User extends Authenticatable
         'password', 'remember_token',
     ];
 
-    public function cart()
-    {
-        return $this->hasOne('App\Cart');
-    }
-
     public function orders()
     {
         return $this->hasMany('App\Order');

config/session.php

@@ -29,9 +29,9 @@
     |
     */
 
-    'lifetime' => 120,
+    'lifetime' => 3600,
 
-    'expire_on_close' => false,
+    'expire_on_close' => true,
 
     /*
     |--------------------------------------------------------------------------

database/factories/ModelFactory.php

@@ -23,11 +23,6 @@
     ];
 });
 
-$factory->define(App\Cart::class, function (Faker\Generator $faker) {
-
-    return [];
-});
-
 $factory->define(App\Category::class, function (Faker\Generator $faker) {
 
     return [
@@ -52,10 +47,3 @@
         'price' => $faker->randomFloat(2, 150, 900)
     ];
 });
-
-$factory->define(App\Item::class, function (Faker\Generator $faker) {
-
-    return [
-        'product_id' => rand(1, 20)
-    ];
-});

database/seeds/DatabaseSeeder.php

@@ -15,6 +15,5 @@ public function run()
         $this->call(CategoriesTableSeeder::class);
         $this->call(SubcategoriesTableSeeder::class);
         $this->call(ProductsTableSeeder::class);
-        $this->call(ItemsTableSeeder::class);
     }
 }