raspberry/iOS/Wallet/Sources/Common/Empty/CommonViewEmptyContainer.swift

//
//  CommonViewEmptyContainer.swift
//  Wallet
//
//  Created by Igor on 04.03.2021.
//  Copyright © 2021 AM. All rights reserved.
//

import UIKit

class CommonViewEmptyContainer: UIView {
    
    @IBOutlet private weak var contentView: UIView!
    @IBOutlet weak var loadingView: UIView?
    
    let emptyView = CommonViewEmpty()
    
    var isEmpty = false {
        didSet { update() }
    }
    
    var isLoading = false {
        didSet { update() }
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setup()
    }
    
    private func setup() {
        emptyView.frame = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)
        emptyView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        emptyView.translatesAutoresizingMaskIntoConstraints = true
        emptyView.alpha = 0
        addSubview(emptyView)
    }
    
    @IBInspectable var image: UIImage? {
        get { emptyView.image }
        set { emptyView.image = newValue }
    }
    
    @IBInspectable var title: String? {
        get { emptyView.title }
        set { emptyView.title = newValue }
    }
    
    @IBInspectable var text: String? {
        get { emptyView.text }
        set { emptyView.text = newValue }
    }
    
    var action: CommonMenuAction? {
        get { emptyView.action }
        set { emptyView.action = newValue }
    }
    
    private func update() {
        bringSubviewToFront(emptyView)
        if isLoading {
            Loader.show(in: loadingView ?? self)
            UIView.animate(withDuration: Animation.slow) {
                self.emptyView.alpha = 0
                self.contentView.alpha = 0
            }
        } else {
            Loader.hide(in: loadingView ?? self)
            UIView.animate(withDuration: Animation.slow) {
                self.emptyView.alpha = self.isEmpty ? 1 : 0
                self.contentView.alpha = self.isEmpty ? 0 : 1
            }
        }
    }
    
}