//: Playground - noun: a place where people can play
import Foundation

var a:Model = Model()
a.title = "aaa"
let js = a.toJsonString()
let b = Model.from(jsonString:js!)!
print(b.title)

class Model: Codable {
    var title:String = ""
    var commandArgs:[String] = []
    var ignore:String = "b"

    enum CodingKeys: String, CodingKey {
        case title
        case commandArgs
    }

    required init() {}

    required init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        title = try values.decode(String.self, forKey: .title)
        commandArgs = try values.decode([String].self, forKey: .commandArgs)
    }

    func toJsonString(/*isPretty:Bool = false*/) -> String? {
        guard let jsondata = try? JSONEncoder().encode(self) else { return nil }
        /*if isPretty {
         if let data = try? JSONSerialization.data(withJSONObject: jsondata, options: .prettyPrinted),
         return String(data: data, encoding: .utf8)
         }*/
        if let jsonString:String = String(data: jsondata, encoding: .utf8) {
            //print(jsonString)
            //try? jsonString.write(to: destinationURL, atomically: true, encoding: .utf8)
            return jsonString
        }
        return nil
    }
    static func from(jsonString:String) -> Model? {
        // let jsonData:Data = try? Data(contentsOf:url) {
        if let jsonData:Data = jsonString.data(using: .utf8),
            let data:Model = try? JSONDecoder().decode(Model.self, from: jsonData) {
            return data
        }
        return nil
    }
}