creating cart crud

controllers/CartController.php

@@ -0,0 +1,85 @@
+<?php
+
+    namespace app\controllers;
+    use app\core\Application;
+    use app\core\Controller;
+    use app\core\Request;
+    use app\core\Response;
+    use app\models\cart;
+
+    class CartController extends Controller {
+
+        // add product to the cart 
+        public function addToCartController (Request $request, Response $response) {
+            $user_id = Application::$app->session->get('customer');
+
+            if (!$user_id) {
+                Application::$app->response->redirect('/customer-login');
+            }
+
+            $product_id = $request->getBody()['product_id'];
+            $quantity = $request->getBody()['quantity'] ?? 1;
+
+            if (!$product_id) {
+                Application::$app->session->setFlash('error','no id getting ');
+            }
+
+            $cart = new Cart();
+            if ($cart->addToCart($user_id, $product_id, $quantity)) {
+                Application::$app->session->setFlash('success','Product add to cart');
+                // http_response_code(200); // Set HTTP status code
+                // header('Content-Type: application/json'); // Set response header
+                // echo json_encode(['message' => 'Product added to cart']);
+                Application::$app->response->redirect('/market-place-home');
+
+            } else {
+                Application::$app->session->setFlash('error','Prodcut add to cart fail');
+                // http_response_code(400); // Set HTTP status code
+                // header('Content-Type: application/json'); // Set response header
+                // echo json_encode(['message' => 'Failed to add product to cart']); 
+                Application::$app->response->redirect('/market-place-home');
+            }
+        }
+
+        //function to retrive products 
+        public function viewCart() {
+            if (!Application::$app->session->get('customer')) {
+                Application::$app->response->redirect('/customer-login');
+            }
+
+            $user_id = Application::$app->session->get('customer');
+            $cart = new Cart();
+            $cartItems = $cart->getCartItems($user_id);
+
+            if(empty($cartItems)){
+                Application::$app->session->setFlash('error','Cart is empty');
+                Application::$app->response->redirect('/market-place-home');
+            }
+
+            $this->setLayout('auth');
+            return $this->render('service-centre/view-cart', ['cartItems'=> $cartItems]);
+
+        }
+
+        //function to remove cart items 
+        public function removeItemsFromCart(Request $request, Response $response) {
+            if (!Application::$app->session->get('customer')) {
+                Application::$app->session->setFlash('error','Please login first');
+                Application::$app->response->redirect('/customer-login');
+            }
+            $user_id = Application::$app->session->get('customer');
+            $product_id = $request->getBody()['product_id'];
+
+            if (!$product_id) {
+                Application::$app->session->setFlash('error','Select item to remove');
+            }
+            $cart = new Cart();
+            if ($cart->removeCartItem($user_id, $product_id)) {
+                Application::$app->response->redirect('/view-cart');
+                Application::$app->session->setFlash('success','Product remove successfully');
+            } else {
+                Application::$app->session->setFlash('error','Product remove failed, try again');
+            }
+        }
+
+    }

controllers/ProductController.php

@@ -135,8 +135,27 @@ public function delete(Request $request){
     }
 
 
-}
+    public function filterProductByCategory(Request $request, Response $response) {
+        //get category by the params 
+
+        $category = $_GET['category'] ?? 'all';
+
+        if ($category === 'all') {
+            $products = (new Product())->getAllProducts(); 
+        } else {
+            $products = (new Product())->getProductsByCategory($category); 
+        }
 
+
 
+        if ($products) {
+            $this->setLayout('auth');
+            return $this->render('service-centre/market-place-home', [
+                'products'=> $products,
+            ]);
+        }
+    }
+
+}
 
 ?>

controllers/ServiceCentreController.php

@@ -124,6 +124,12 @@ public function serviceCenterMessages()
         return $this->render('/service-centre/service-center-messages');
     }
 
+    public function cart()
+    {
+        $this->setLayout('auth');
+        return $this->render('/service-centre/view-cart');
+    }
+
     public function viewServiceCenterProfile($id)
     {
 

core/DbModel.php

@@ -11,6 +11,13 @@ abstract public function attributes(): array;
     abstract public function primaryKey(): string;
 
 
+    // protected Database $db;
+
+    // public function __construct(){
+    //     $this->db = Application::$app->db;
+    // }
+
+
     public function save()
     {
 

models/Product.php

@@ -11,6 +11,7 @@ class Product extends DbModel
         public string $description = '';
         public float $price;
         public string $media = '';
+        public string $category;
         public ?string $created_at = null;
         public ?string $updated_at = null;
 
@@ -21,7 +22,7 @@ public function tableName(): string
 
         public function attributes(): array
         {
-            return ['ser_cen_id', 'description', 'price', 'media'];
+            return ['ser_cen_id', 'description', 'price', 'media', 'category'];
         }
         public function primaryKey(): string
         {
@@ -101,7 +102,7 @@ public function editProduct(): bool
         {
             $sql = "
         UPDATE product
-        SET description = :description, price = :price, media = CASE WHEN :media = '' THEN media ELSE :media END, updated_at = NOW()
+        SET description = :description, price = :price, category = :category, media = CASE WHEN :media = '' THEN media ELSE :media END, updated_at = NOW()
         WHERE product_id = :product_id AND ser_cen_id = :ser_cen_id
     ";
 
@@ -111,6 +112,7 @@ public function editProduct(): bool
             $stmt->bindValue(':media', $this->media);
             $stmt->bindValue(':product_id', $this->product_id);
             $stmt->bindValue(':ser_cen_id', $this->ser_cen_id);
+            $stmt->bindValue(':category', $this->category);
 
             // Debugging: Check SQL and parameters
 //            var_dump([
@@ -163,6 +165,27 @@ public function updateRules(): array
 
             ];
         }
+
+        public function getProductsByCategory(string $category) {
+            try {
+
+                $sql = 'SELECT p.*, s.name AS seller_name
+                    FROM product p
+                    JOIN service_center s ON p.ser_cen_id = s.ser_cen_id
+                    WHERE p.category = :category
+                    ORDER BY p.created_at DESC';
+
+                $stmt = self::prepare($sql);
+                $stmt->bindValue(':category', $category);
+                $stmt->execute();
+
+                return $stmt->fetchAll(\PDO::FETCH_ASSOC);
+
+            } catch (\Exception $e) {
+                error_log($e->getMessage());
+                return [];
+            }
+        }
     }
 
 ?>

models/cart.php

@@ -0,0 +1,121 @@
+<?php
+
+    namespace app\models;
+    use app\core\DbModel;
+    use app\core\Application;
+
+    class Cart extends DbModel
+    {
+        public int $id;
+        public int $cart_id;
+        public int $user_id;
+        public int $product_id;
+        public int $quantity;
+        public ?string $created_at = null;
+        public ?string $updated_at = null;
+
+        public function tableName(): string {
+            return 'cart_items';
+        } 
+
+        public function attributes(): array {
+            return ['cart_id','product_id','quantity'];
+        }
+
+        public function primaryKey(): string {
+            return 'id';
+        }
+
+        // add a product to cart 
+        public function addToCart(int $user_id, int $product_id, int $quantity) {
+            //get the cart_id for the user 
+            $sql = 'SELECT cart_id FROM customer WHERE cus_id = :cus_id';
+            $stmt = self::prepare($sql);
+            $stmt->bindValue(':cus_id', $user_id);
+            $stmt->execute();
+            $cart = $stmt->fetchColumn();
+
+            //if user does not have an cart, then create a one 
+            if (!$cart) {
+                // $this->db->query("INSERT INTO cart (user_id) VALUES (?)", [$user_id]);
+                // $cart = $this->db->lastInsertId();
+                // $this->db->query("UPDATE customer SET cart_id = ? WHERE cus_id = ?", [$cart, $user_id]); 
+                $stmt = Application::$app->db->pdo->prepare("INSERT INTO cart (user_id) VALUES (?)");
+                $stmt->execute([$user_id]);
+
+                // Get last inserted cart_id
+                $cart = Application::$app->db->pdo->lastInsertId();
+
+                // Update customer table with the cart_id
+                $stmt = Application::$app->db->pdo->prepare("UPDATE customer SET cart_id = ? WHERE cus_id = ?");
+                $stmt->execute([$cart, $user_id]); 
+            }
+            // $existing = $this->db->query("SELECT id FROM cart_items WHERE cart_id = ? AND product_id = ?", [$cart, $product_id])->fetchColumn();
+            // Check if the product is already in the cart
+            $stmt = Application::$app->db->pdo->prepare("SELECT id FROM cart_items WHERE cart_id = ? AND product_id = ?");
+            $stmt->execute([$cart, $product_id]);
+            $existing = $stmt->fetchColumn();
+
+            if ($existing) {
+                // $this->db->query("UPDATE cart_items SET quantity = quantity + ? WHERE id = ?", [$quantity, $existing]);
+                // Update quantity if product exists in cart
+                $stmt = Application::$app->db->pdo->prepare("UPDATE cart_items SET quantity = quantity + ? WHERE id = ?");
+                $stmt->execute([$quantity, $existing]);
+            } else {
+                // $this->db->query("INSERT INTO cart_items (cart_id, product_id, quantity) VALUES (?, ?, ?)", [$cart, $product_id, $quantity]);
+                // Insert new product into cart_items
+                $stmt = Application::$app->db->pdo->prepare("INSERT INTO cart_items (cart_id, product_id, quantity) VALUES (?, ?, ?)");
+                $stmt->execute([$cart, $product_id, $quantity]);
+            }
+
+            return true;
+
+        }
+
+        //get all items for a specific user 
+        public function getCartItems(int $user_id) {
+            $db = Application::$app->db->pdo;
+            $stmt = $db->prepare("
+                SELECT ci.id, ci.product_id, ci.quantity, p.description, p.price, p.media 
+                FROM cart_items ci
+                JOIN cart c ON ci.cart_id = c.id
+                JOIN product p ON ci.product_id = p.product_id
+                WHERE c.user_id = ?
+            "); 
+            $stmt->execute([$user_id]);
+            return $stmt->fetchAll(\PDO::FETCH_ASSOC);
+        } 
+
+        //model to remove items from the cart 
+        public function removeCartItem(int $user_id, int $product_id) {
+            $db = Application::$app->db->pdo;
+
+            $stmt = $db->prepare("SELECT id FROM cart WHERE user_id = ?");
+            $stmt->execute([$user_id]);
+            $cart = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+            if (!$cart) {
+                return false;
+            }
+
+            $cart_id = $cart['id'];
+
+            $stmt = $db->prepare("DELETE FROM cart_items WHERE cart_id = ? AND product_id = ?");
+            return $stmt->execute([$cart_id, $product_id]);
+        }
+
+        public function rules(): array
+        {
+            return [
+
+            ];
+        }
+
+        public function updateRules(): array
+        {
+            return [
+
+            ];
+        }
+
+    }

public/css/service-center/add-products.css

@@ -162,6 +162,33 @@ table tr:hover {
     background-color: #e9ecef;
 }
 
+.category-select {
+    width: 100%;
+    max-width: 300px;
+    padding: 10px;
+    font-size: 14px;
+    border: 2px solid #ccc;
+    border-radius: 5px;
+    background-color: #fff;
+    color: #333;
+    cursor: pointer;
+    outline: none;
+    transition: border-color 0.3s ease-in-out;
+}
+
+.category-select:focus {
+    border-color: #007bff;  
+}
+
+option {
+    font-size: 14px;
+    padding: 10px;
+}
+
+.category-select:hover {
+    border-color: #0056b3;
+}
+
 /* Responsive Table */
 @media (max-width: 768px) {
     table {