ActionViewController.swift

//
//  ActionViewController.swift
//  Extension
//
//  Created by Julian Moorhouse on 14/08/2019.
//  Copyright © 2019 Mindwarp Consultancy Ltd. All rights reserved.
//

import UIKit
import MobileCoreServices

class ActionViewController: UIViewController {
    @IBOutlet var script: UITextView!
    @IBOutlet var scriptName: UITextField!
    
    var pageTitle = ""
    var pageURL = ""
    
    var initialItem: SiteScript!
    
    var didUpdateItem: ((_ item: SiteScript) -> Void)?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let notificationCenter = NotificationCenter.default
        notificationCenter.addObserver(self, selector: #selector(adjustForKeyboard), name: UIResponder.keyboardWillHideNotification, object: nil)
        notificationCenter.addObserver(self, selector: #selector(adjustForKeyboard), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)

        title = initialItem.urlPageTitle
        script.text = initialItem.script
        scriptName.text = initialItem.scriptName
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        
        if var site = initialItem {
            site.scriptName = self.scriptName.text!
            site.script = self.script.text
            
            didUpdateItem?(site)
        }
    }

    @objc func adjustForKeyboard(notification: Notification) {
        guard let keyboardValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
        let keyboardScreenEndFrame = keyboardValue.cgRectValue
        let keyboardViewEndFrame = view.convert(keyboardScreenEndFrame, from: view.window)
        
        if notification.name == UIResponder.keyboardWillHideNotification {
            script.contentInset = .zero
        } else {
            script.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: keyboardViewEndFrame.height - view.safeAreaInsets.bottom, right: 0)
        }
        
        script.scrollIndicatorInsets = script.contentInset
        
        let selectedRange = script.selectedRange
        script.scrollRangeToVisible(selectedRange)
    }
}