swift-settings.swift

//
//  ContentView.swift
//  TestSwiftSettings3
//
//  Created by Christian Selig on 2021-05-13.
//

import SwiftUI
import Combine

struct Setting {
    enum SettingType {
        case toggle
        case menu(items: [String])
    }
    
    let title: String
    let iconName: String
    let key: String
    let type: SettingType
}

struct ContentView: View {
    var settings: [Setting] = [
        Setting(title: "I Like Ants", iconName: "ant.fill", key: "likes-ants", type: .toggle),
        Setting(title: "Ant Type", iconName: "folder.fill", key: "ant-type", type: .menu(items: ["Fluffy", "Furry", "Scaley"]))
    ]
    
    var body: some View {
        Form {
            Section {
                ForEach(settings, id: \.key) { (setting) in
                    switch setting.type {
                    case .toggle:
                        ToggleSettingView(setting: setting)
                    case .menu:
                        MenuSettingView(setting: setting)
                    }
                }
            }
        }
    }
}

struct ToggleSettingView: View {
    let setting: Setting
    
    var body: some View {
        Toggle(isOn: getBinding(for: setting), label: {
            HStack {
                Image(systemName: setting.iconName).foregroundColor(.pink)
                Text(setting.title)
            }
        })
    }
    
    func getBinding(for setting: Setting) -> Binding<Bool> {
        return Binding<Bool>(
            get: {
                UserDefaults.standard.bool(forKey: setting.key)
            },
            set: { (value) in
                UserDefaults.standard.set(value, forKey: setting.key)
            }
        )
    }
}

struct MenuSettingView: View {
    let setting: Setting
    
    var body: some View {
        HStack {
            Button(action: {
                // What do do on button press? e.g.: set it to option "Scaley" which is at index 2?
            }, label: {
                HStack {
                    Image(systemName: setting.iconName).foregroundColor(.pink)
                    Text(setting.title).foregroundColor(.black)
                    
                    Spacer()
                    
                    Text(menuItems[getBinding(for: setting).wrappedValue]).foregroundColor(.gray)
                }
            })
        }
    }
    
    var menuItems: [String] {
        switch setting.type {
        case .menu(let items):
            return items
        default:
            fatalError("Should be menu type")
        }
    }
    
    func getBinding(for setting: Setting) -> Binding<Int> {
        return Binding<Int>(
            get: {
                UserDefaults.standard.integer(forKey: setting.key)
            },
            set: { (value) in
                UserDefaults.standard.set(value, forKey: setting.key)
            }
        )
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}