still trying

//
//  ContentView.swift
//  teste
//
//  Created by Renan Lins on 6/4/22.
//

import SwiftUI

class ViewModel: ObservableObject {
    @Published var selectedLangs: [String] = []
    let langList = ["fr", "en", "pt"]
}

struct ContentView: View {
    let viewModel = ViewModel()
    var body: some View {
        VStack {
            List(viewModel.langList, id:\.self) {lang in
                TestToggle(title: lang) { isOn in
                    if isOn {
                        self.viewModel.selectedLangs.append(lang)
                    } else {
                        self.viewModel.selectedLangs = self.viewModel.selectedLangs.filter { $0 != lang }
                    }
                }
            }
        }
    }
}

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

struct TestToggle: View {
    let title: String
    let completion: (Bool) -> Void
    @State private var isOn: Bool = false
    
    var body: some View {
        Toggle(self.title, isOn: $isOn)
            .onChange(of: self.isOn) { newValue in
                completion(newValue)
            }
    }
}