Adding a local variable to downloaded MySQL Data with Models - ios

Question

I am using MySQL and PHP to download a restaurants menu but the user of the app should be able to add a certain amount to which item from the menu they want. Currently I am using a stepper to indicate the amount and adding that amount to a UserDefaults key which gets called when the menu is downloaded again.
This makes me have to download the menu again when I go to another viewController which sums up the order but I can't seem to filter out only them items which do have an amount.
What is a better way to add that amount to the downloaded data and how can I filter these items in my cart ViewController to only show and use the items which have an amount.
My current downloadModel, MenuModel, cellViewController (for the menu tableview) look like this:
MenuDownload.swift:
import UIKit
protocol MenuDownloadProtocol: class {
func productsDownloaded(products: NSArray)
}
class MenuDownload: NSObject {
//properties
weak var delegate: MenuDownloadProtocol!
func downloadProducts() {
let urlPath = "http://server.com/download.php" // Fake URL obviously
let url: URL = URL(string: urlPath)!
let defaultSession = Foundation.URLSession(configuration: URLSessionConfiguration.default)
let task = defaultSession.dataTask(with: url) { (data, response, error) in
if error != nil {
print("Failed to download data")
}else {
print("Menu downloaded")
self.parseJSON(data!)
}
}
task.resume()
}
func parseJSON(_ data:Data) {
var jsonResult = NSArray()
do{
jsonResult = try JSONSerialization.jsonObject(with: data, options:JSONSerialization.ReadingOptions.allowFragments) as! NSArray
} catch let error as NSError {
print(error)
}
var jsonElement = NSDictionary()
let products = NSMutableArray()
for i in 0 ..< jsonResult.count
{
jsonElement = jsonResult[i] as! NSDictionary
let restomenu = MenuModel()
//the following insures none of the JsonElement values are nil through optional binding
if let product = jsonElement["product"] as? String,
let price = jsonElement["price"] as? String,
let info = jsonElement["info"] as? String,
let imageurl = jsonElement["imageurl"] as? String
{
let productandprice = product + " " + "€" + price
let quantityy = UserDefaults.standard.object(forKey: productandprice) as? String
restomenu.product = product
restomenu.price = price
restomenu.info = info
restomenu.imageurl = imageurl
restomenu.quantity = quantityy
}
products.add(restomenu)
}
DispatchQueue.main.async(execute: { () -> Void in
self.delegate.productsDownloaded(products: products)
})
}
}
extension String {
func chopPrefix(_ count: Int = 1) -> String {
return substring(from: index(startIndex, offsetBy: count))
}
func chopSuffix(_ count: Int = 1) -> String {
return substring(to: index(endIndex, offsetBy: -count))
}
}
MenuModel.swift:
import UIKit
class MenuModel: NSObject {
//properties
var product: String?
var price: String?
var info: String?
var imageurl: String?
var quantity: String?
//empty constructor
override init()
{
}
init(product: String, price: String, info: String, imageurl: String, quantity: String) {
self.product = product
self.price = price
self.info = info
self.imageurl = imageurl
self.quantity = quantity
}
//prints object's current state
override var description: String {
return "product: \(String(describing: product)), price: \(String(describing: price)), info: \(String(describing: info)), imageurl: \(String(describing: imageurl)), quantity: \(String(describing: quantity))"
}
}
tableViewCell.swift:
import UIKit
class productTableViewCell: UITableViewCell {
#IBOutlet weak var productLabel: UILabel!
#IBOutlet weak var productImage: UIImageView!
#IBOutlet weak var cellView: UIView!
#IBOutlet weak var orderCount: UILabel!
#IBOutlet weak var stepper: UIStepper!
var amount: String?
#IBAction func stepperValueChanged(_ sender: UIStepper) {
amount = Int(sender.value).description
orderCount.text = amount
// let defaultkey = String(productLabel.text!)
UserDefaults.standard.setValue(amount, forKey: productLabel.text!)
if amount == "0"
{
orderCount.isHidden = true
UserDefaults.standard.removeObject(forKey: productLabel.text!)
}
else
{
orderCount.isHidden = false
}
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
EDIT: after trying filtering options and many different ways I still haven't found how to fix this. I think I'm overthinking it too much.