DNSecure/DNSecure/Views/LazyTextField.swift

//
//  LazyTextField.swift
//  DNSecure
//
//  Created by Kenta Kubo on 4/25/23.
//

import SwiftUI

struct LazyTextField {
    private let title: String
    @Binding private var text: String
    @State private var localText: String
    @FocusState private var isFocused

    init(_ title: some StringProtocol, text: Binding<String>) {
        self.title = String(title)
        self._text = text
        self._localText = .init(initialValue: text.wrappedValue)
    }
}

extension LazyTextField: View {
    var body: some View {
        TextField(self.title, text: self.$localText)
            .focused(self.$isFocused)
            .onChange(of: self.isFocused) { isFocused in
                if !isFocused {
                    self.text = self.localText
                }
            }
            .onChange(of: self.text) { text in
                self.localText = text
            }
    }
}

struct LazyTextField_Previews: PreviewProvider {
    static var previews: some View {
        LazyTextField("Name", text: .constant(""))
    }
}