metatext-app-ios-iphone-ipad/Views/SecondaryNavigationButton.s...

70 lines
2.3 KiB
Swift

// Copyright © 2021 Metabolist. All rights reserved.
import Combine
import Kingfisher
import UIKit
import ViewModels
final class SecondaryNavigationButton: UIBarButtonItem {
private var cancellables = Set<AnyCancellable>()
init(viewModel: NavigationViewModel, rootViewModel: RootViewModel) {
super.init()
let button = UIButton(
type: .custom,
primaryAction: UIAction { _ in viewModel.presentingSecondaryNavigation = true })
let downsampled = KingfisherOptionsInfo.downsampled(
dimension: .barButtonItemDimension,
scaleFactor: UIScreen.main.scale)
button.imageView?.contentMode = .scaleAspectFill
button.layer.cornerRadius = .barButtonItemDimension / 2
button.clipsToBounds = true
customView = button
NSLayoutConstraint.activate([
button.widthAnchor.constraint(equalToConstant: .barButtonItemDimension),
button.heightAnchor.constraint(equalToConstant: .barButtonItemDimension)
])
viewModel.identityContext.$identity.sink {
button.kf.setImage(
with: $0.image,
for: .normal,
placeholder: UIImage(systemName: "line.horizontal.3"),
options: downsampled)
}
.store(in: &cancellables)
viewModel.$recentIdentities.sink { identities in
button.menu = UIMenu(children: identities.map { identity in
UIDeferredMenuElement { completion in
let action = UIAction(title: identity.handle) { _ in
rootViewModel.identitySelected(id: identity.id)
}
if let image = identity.image {
KingfisherManager.shared.retrieveImage(with: image, options: downsampled) {
if case let .success(value) = $0 {
action.image = value.image
}
completion([action])
}
} else {
completion([action])
}
}
})
}
.store(in: &cancellables)
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}