SwiftUI/Examples/UINote/SwiftUINote/Views/NoteDetail.swift

//
//  NoteDetail.swift
//  SwiftUINote
//
//  Created by chanju Jeon on 05/06/2019.
//  Copyright © 2019 we'd. All rights reserved.
//

import SwiftUI

struct NoteDetail : View {
    @EnvironmentObject var userData: UserData
    var note: Note
    private var text: State<String>
    
    init(note: Note) {
        self.note = note
        self.text = .init(initialValue: note.text)
    }
    
    var noteIndex: Int {
        userData.notes.firstIndex(where: { $0.id == note.id })!
    }
    
    var body: some View {
        VStack {
            TextField(self.text.binding,
                      placeholder: nil,
                      onEditingChanged: { _ in self.updateNote()},
                      onCommit: {})
            Spacer()
        }
        .padding()
        .navigationBarTitle(
            Text(NoteData.dateToString(date: note.date)), displayMode: .inline)
    }
    
    private func updateNote() {
        self.userData.notes[noteIndex].text = self.text.value
    }
}

#if DEBUG
struct NoteDetail_Previews : PreviewProvider {
    static var previews: some View {
        NoteDetail(note: NoteData.shared.notes[0])
            .environmentObject(UserData())
    }
}
#endif