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//
// NotificationBannerView.swift
// MullvadVPN
//
// Created by pronebird on 01/06/2021.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import UIKit
final class NotificationBannerView: UIView {
private let backgroundView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
private let titleLabel: UILabel = {
let textLabel = UILabel()
textLabel.font = .mullvadTinySemiBold
textLabel.adjustsFontForContentSizeCategory = true
textLabel.textColor = UIColor.InAppNotificationBanner.titleColor
textLabel.numberOfLines = 0
textLabel.lineBreakMode = .byWordWrapping
textLabel.lineBreakStrategy = []
return textLabel
}()
private let bodyLabel: UILabel = {
let textLabel = UILabel()
textLabel.font = .mullvadTiny
textLabel.adjustsFontForContentSizeCategory = true
textLabel.textColor = UIColor.InAppNotificationBanner.bodyColor
textLabel.numberOfLines = 0
textLabel.lineBreakMode = .byWordWrapping
textLabel.lineBreakStrategy = []
return textLabel
}()
private let indicatorView: UIView = {
let view = UIView()
view.backgroundColor = .dangerColor
view.layer.cornerRadius = UIMetrics.InAppBannerNotification.indicatorSize.width * 0.5
view.layer.cornerCurve = .circular
return view
}()
private let wrapperView: UIView = {
let view = UIView()
view.directionalLayoutMargins = UIMetrics.InAppBannerNotification.layoutMargins
return view
}()
private lazy var bodyStackView: UIStackView = {
let stackView = UIStackView(arrangedSubviews: [titleLabel, bodyLabel])
stackView.alignment = .top
stackView.distribution = .fill
stackView.axis = .vertical
stackView.spacing = UIStackView.spacingUseSystem
return stackView
}()
private lazy var contentStackView: UIStackView = {
let stackView = UIStackView(arrangedSubviews: [bodyStackView, actionButton])
stackView.spacing = UIStackView.spacingUseSystem
stackView.alignment = .center
return stackView
}()
private let actionButton: IncreasedHitButton = {
let button = IncreasedHitButton(type: .system)
button.tintColor = UIColor.InAppNotificationBanner.actionButtonColor
return button
}()
var title: String? {
didSet {
titleLabel.text = title
}
}
var body: NSAttributedString? {
didSet {
bodyLabel.attributedText = body
}
}
var style: NotificationBannerStyle = .error {
didSet {
indicatorView.backgroundColor = style.color
}
}
var action: InAppNotificationAction? {
didSet {
let image = action?.image
let showsAction = image != nil
actionButton.setBackgroundImage(image, for: .normal)
actionButton.widthAnchor.constraint(equalToConstant: 24).isActive = true
actionButton.heightAnchor.constraint(equalTo: actionButton.widthAnchor).isActive = true
actionButton.isHidden = !showsAction
}
}
var tapAction: InAppNotificationAction?
override init(frame: CGRect) {
super.init(frame: frame)
addSubviews()
addTapHandler()
addActionHandlers()
addConstraints()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func addTapHandler() {
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
addGestureRecognizer(tapGesture)
}
private func addActionHandlers() {
actionButton.addTarget(self, action: #selector(handleActionTap), for: .touchUpInside)
}
@objc
private func handleTap() {
tapAction?.handler?()
}
private func addSubviews() {
wrapperView.addConstrainedSubviews([indicatorView, contentStackView])
backgroundView.contentView.addConstrainedSubviews([wrapperView]) {
wrapperView.pinEdgesToSuperview()
}
addConstrainedSubviews([backgroundView]) {
backgroundView.pinEdgesToSuperview()
}
}
private func addConstraints() {
NSLayoutConstraint.activate([
indicatorView.bottomAnchor.constraint(equalTo: titleLabel.firstBaselineAnchor),
indicatorView.leadingAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.leadingAnchor),
indicatorView.widthAnchor
.constraint(equalToConstant: UIMetrics.InAppBannerNotification.indicatorSize.width),
indicatorView.heightAnchor
.constraint(equalToConstant: UIMetrics.InAppBannerNotification.indicatorSize.height),
contentStackView.topAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.topAnchor),
contentStackView.leadingAnchor.constraint(
equalToSystemSpacingAfter: indicatorView.trailingAnchor,
multiplier: 1
),
contentStackView.trailingAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.trailingAnchor),
contentStackView.bottomAnchor.constraint(equalTo: wrapperView.layoutMarginsGuide.bottomAnchor),
])
}
@objc private func handleActionTap() {
action?.handler?()
}
}
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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