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//
// NotificationBannerView.swift
// MullvadVPN
//
// Created by pronebird on 01/06/2021.
// Copyright © 2021 Mullvad VPN AB. All rights reserved.
//
import UIKit
final class NotificationBannerView: UIView {
private static let indicatorViewSize = CGSize(width: 12, height: 12)
private let backgroundView: UIVisualEffectView = {
let effect = UIBlurEffect(style: .dark)
let visualEffectView = UIVisualEffectView(effect: effect)
visualEffectView.translatesAutoresizingMaskIntoConstraints = false
return visualEffectView
}()
private let titleLabel: UILabel = {
let textLabel = UILabel()
textLabel.translatesAutoresizingMaskIntoConstraints = false
textLabel.font = UIFont.systemFont(ofSize: 17, weight: .bold)
textLabel.textColor = UIColor.InAppNotificationBanner.titleColor
textLabel.numberOfLines = 0
textLabel.lineBreakMode = .byWordWrapping
if #available(iOS 14.0, *) {
// See: https://stackoverflow.com/q/46200027/351305
textLabel.lineBreakStrategy = []
}
return textLabel
}()
private let bodyLabel: UILabel = {
let textLabel = UILabel()
textLabel.translatesAutoresizingMaskIntoConstraints = false
textLabel.font = UIFont.systemFont(ofSize: 17)
textLabel.textColor = UIColor.InAppNotificationBanner.bodyColor
textLabel.numberOfLines = 0
textLabel.lineBreakMode = .byWordWrapping
if #available(iOS 14.0, *) {
// See: https://stackoverflow.com/q/46200027/351305
textLabel.lineBreakStrategy = []
}
return textLabel
}()
private let indicatorView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = .dangerColor
view.layer.cornerRadius = NotificationBannerView.indicatorViewSize.width * 0.5
view.layer.cornerCurve = .circular
return view
}()
private let wrapperView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.layoutMargins = UIMetrics.inAppBannerNotificationLayoutMargins
return view
}()
var title: String? {
didSet {
titleLabel.text = title
}
}
var body: String? {
didSet {
bodyLabel.text = body
}
}
var style: NotificationBannerStyle = .error {
didSet {
indicatorView.backgroundColor = style.color
}
}
override init(frame: CGRect) {
super.init(frame: frame)
for subview in [titleLabel, bodyLabel, indicatorView] {
wrapperView.addSubview(subview)
}
backgroundView.contentView.addSubview(wrapperView)
addSubview(backgroundView)
NSLayoutConstraint.activate([
backgroundView.topAnchor.constraint(equalTo: topAnchor),
backgroundView.leadingAnchor.constraint(equalTo: leadingAnchor),
backgroundView.trailingAnchor.constraint(equalTo: trailingAnchor),
backgroundView.bottomAnchor.constraint(equalTo: bottomAnchor),
wrapperView.topAnchor.constraint(equalTo: backgroundView.contentView.topAnchor),
wrapperView.leadingAnchor.constraint(equalTo: backgroundView.contentView.leadingAnchor),
wrapperView.trailingAnchor
.constraint(equalTo: backgroundView.contentView.trailingAnchor),
wrapperView.bottomAnchor.constraint(equalTo: backgroundView.contentView.bottomAnchor),
indicatorView.bottomAnchor.constraint(equalTo: titleLabel.firstBaselineAnchor),
indicatorView.leadingAnchor
.constraint(equalTo: wrapperView.layoutMarginsGuide.leadingAnchor),
indicatorView.widthAnchor.constraint(equalToConstant: Self.indicatorViewSize.width),
indicatorView.heightAnchor.constraint(equalToConstant: Self.indicatorViewSize.height),
titleLabel.topAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.topAnchor),
titleLabel.leadingAnchor.constraint(
equalToSystemSpacingAfter: indicatorView.trailingAnchor,
multiplier: 1
),
titleLabel.trailingAnchor
.constraint(equalTo: wrapperView.layoutMarginsGuide.trailingAnchor),
bodyLabel.topAnchor.constraint(
equalToSystemSpacingBelow: titleLabel.bottomAnchor,
multiplier: 1
),
bodyLabel.leadingAnchor.constraint(equalTo: titleLabel.leadingAnchor),
bodyLabel.trailingAnchor.constraint(equalTo: titleLabel.trailingAnchor),
bodyLabel.bottomAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.bottomAnchor),
])
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
private extension NotificationBannerStyle {
var color: UIColor {
switch self {
case .success:
return UIColor.InAppNotificationBanner.successIndicatorColor
case .warning:
return UIColor.InAppNotificationBanner.warningIndicatorColor
case .error:
return UIColor.InAppNotificationBanner.errorIndicatorColor
}
}
}
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