//
//  KeyboardReader.swift
//  ComposeUI
//
//  Created by Shadowfacts on 3/7/23.
//

import UIKit
import Combine

@available(iOS, obsoleted: 16.0)
class KeyboardReader: ObservableObject {
    @Published var isVisible = false
    
    init() {
        NotificationCenter.default.addObserver(self, selector: #selector(willShow), name: UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(willHide), name: UIResponder.keyboardWillHideNotification, object: nil)
    }
    
    @objc func willShow(_ notification: Foundation.Notification) {
        // when a hardware keyboard is connected, the height is very short, so we don't consider that being "visible"
        let endFrame = notification.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as! CGRect
        isVisible = endFrame.height > 72
    }
    
    @objc func willHide() {
        isVisible = false
    }
}