JSONNetworkingCodablePlayground.swift

//: A UIKit based Playground for presenting user interface
  
import UIKit
import PlaygroundSupport
import Foundation

class MyViewController : UIViewController {
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white

        let label = UILabel()
        label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
        label.text = "Hello World!"
        
        let json = readDamageCards()
        
        label.text = json
        label.textColor = .black
        
        let cards = serializeJSON(jsonString: json)
        
        for card in cards.cards {
            print(card.title)
        }
        
        view.addSubview(label)
        self.view = view
    }
    
    func readDamageCards() -> String {
        var contents: String = ""
        
        if let fileURL = Bundle.main.url(forResource:"core", withExtension: "json")
        {
            do {
                contents = try String(contentsOf: fileURL,
                                          encoding: String.Encoding.utf8)
                print(contents)
            } catch {
                print("Error: \(error.localizedDescription)")
            }
        } else {
            print("No such file URL")
        }

        return contents
    }
    
    func serializeJSON(jsonString: String) -> DamageCardList {
        let jsonData = jsonString.data(using: .utf8)!
        let decoder = JSONDecoder()
        let cards: DamageCardList = try! decoder.decode(DamageCardList.self, from: jsonData)
        
        return cards
    }
}

enum DamageCardType: String, Codable {
    case Ship
    case Pilot
}

struct DamageCard: Codable {
    let title: String
    let amount: Int
    let type: DamageCardType
    let text: String
}

struct DamageCardList : Codable {
    let cards: [DamageCard]
}

// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()