Swift: Codable Nested Data

Codable Nested Data.swift

import UIKit
import SwiftPrettyPrint

/*
* SwiftPrettyPrint
* https://github.com/YusukeHosonuma/SwiftPrettyPrint
*/

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        test()
    }

    func test() {
        // MARK: - Command
        struct Command: Codable {
            let name: String
            let command: String?
            let children: [Command]?
        }

        typealias Commands = [Command]


        let data = """
        [
          {
            "name": "google",
            "command": "search webpage"
          },
          {
            "name": "apple",
            "children": [
              {
                "name": "iOS",
                "children": [
                  {
                    "name": "iPhone",
                    "command": "search iPhone"
                  },
                  {
                    "name": "iPad",
                    "children": [
                      {
                        "name": "iPad1",
                        "command": "search iPad1"
                      },
                      {
                        "name": "iPad2",
                        "command": "search iPad2"
                      }
                    ]
                  },
                  {
                    "name": "iWatch",
                    "command": "search iWatch"
                  }
                ]
              }
            ]
          },
          {
            "name": "microsoft",
            "command": "search microsoft"
          }
        ]
        """.data(using: .utf8)!

        let result = try! JSONDecoder().decode(Commands.self, from: data)

        Pretty.prettyPrint(result)
    }
}

/**
[
    Command(
        name: "google",
        command: "search webpage",
        children: nil
    ),
    Command(
        name: "apple",
        command: nil,
        children: [
            Command(
                name: "iOS",
                command: nil,
                children: [
                    Command(
                        name: "iPhone",
                        command: "search iPhone",
                        children: nil
                    ),
                    Command(
                        name: "iPad",
                        command: nil,
                        children: [
                            Command(
                                name: "iPad1",
                                command: "search iPad1",
                                children: nil
                            ),
                            Command(
                                name: "iPad2",
                                command: "search iPad2",
                                children: nil
                            )
                        ]
                    ),
                    Command(
                        name: "iWatch",
                        command: "search iWatch",
                        children: nil
                    )
                ]
            )
        ]
    ),
    Command(
        name: "microsoft",
        command: "search microsoft",
        children: nil
    )
]
*/