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Pods/SwiftEntryKit/Source/MessageViews/MessagesUtils/EKButtonView.swift

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+//
+//  EKButtonView.swift
+//  SwiftEntryKit
+//
+//  Created by Daniel Huri on 12/8/18.
+//  Copyright © 2018 CocoaPods. All rights reserved.
+//
+
+import UIKit
+
+final class EKButtonView: UIView {
+
+    // MARK: - Properties
+    
+    private let button = UIButton()
+    private let titleLabel = UILabel()
+    
+    private let content: EKProperty.ButtonContent
+    
+    // MARK: - Setup
+    
+    init(content: EKProperty.ButtonContent) {
+        self.content = content
+        super.init(frame: .zero)
+        setupTitleLabel()
+        setupButton()
+        setupAcceessibility()
+        setupInterfaceStyle()
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    private func setupAcceessibility() {
+        isAccessibilityElement = false
+        button.isAccessibilityElement = true
+        button.accessibilityIdentifier = content.accessibilityIdentifier
+        button.accessibilityLabel = content.label.text
+    }
+    
+    private func setupButton() {
+        addSubview(button)
+        button.fillSuperview()
+        button.addTarget(self, action: #selector(buttonTouchUp),
+                         for: [.touchUpInside, .touchUpOutside, .touchCancel])
+        button.addTarget(self, action: #selector(buttonTouchDown),
+                         for: .touchDown)
+        button.addTarget(self, action: #selector(buttonTouchUpInside),
+                         for: .touchUpInside)
+    }
+    
+    private func setupTitleLabel() {
+        titleLabel.numberOfLines = content.label.style.numberOfLines
+        titleLabel.font = content.label.style.font
+        titleLabel.text = content.label.text
+        titleLabel.textAlignment = .center
+        titleLabel.lineBreakMode = .byWordWrapping
+        addSubview(titleLabel)
+        titleLabel.layoutToSuperview(axis: .horizontally,
+                                     offset: content.contentEdgeInset)
+        titleLabel.layoutToSuperview(axis: .vertically,
+                                     offset: content.contentEdgeInset)
+    }
+    
+    private func setBackground(by content: EKProperty.ButtonContent,
+                               isHighlighted: Bool) {
+        if isHighlighted {
+            backgroundColor = content.highlightedBackgroundColor(for: traitCollection)
+        } else {
+            backgroundColor = content.backgroundColor(for: traitCollection)
+        }
+    }
+    
+    private func setupInterfaceStyle() {
+        backgroundColor = content.backgroundColor(for: traitCollection)
+        titleLabel.textColor = content.label.style.color(for: traitCollection)
+    }
+    
+    // MARK: - Selectors
+    
+    @objc func buttonTouchUpInside() {
+        content.action?()
+    }
+    
+    @objc func buttonTouchDown() {
+        setBackground(by: content, isHighlighted: true)
+    }
+    
+    @objc func buttonTouchUp() {
+        setBackground(by: content, isHighlighted: false)
+    }
+    
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+        setupInterfaceStyle()
+    }
+}