Hello. Im making a delivery food app . For each restaurant, i have different food. Im using firebase storage and firestore. When i click + buttom, i want to "add to cart" the items in the selected cell. A tutorial or how can i start it will help me. I really dont know where to start. Thanks!! This is my tableview https://imgur.com/Lft5Yzf

I'm retrieving data like this from firestore and firebase storage.

func getDatabaseRecords() {

            let db = Firestore.firestore()
           //  Empty the array
          food = []

        db.collection("RestaurantViewController").whereField("restaurantName", isEqualTo: restaurantName).getDocuments { (snapshot, error) in
                if let error = error {
                    print(error)
                    return
                } else {
                    for document in snapshot!.documents {
                        let data = document.data()
                        let newEntry = Food(photoKeyRestaurant: data["photoKeyRestaurant"] as! String, foodName: data["foodName"] as! String, foodDescription: data["foodDescription"] as! String, restaurantName: data["restaurantName"] as! String , priceFood: data["priceLabel"] as! Int
                        )

                        self.food.append(newEntry)
                    }
                }
                DispatchQueue.main.async {
                 //  self.datas = self.filteredData
                   self.tableView.reloadData()
                }
            }
        }