metatext/Views/UIKit/SecondaryNavigationButton.swift

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2.3 KiB
Swift
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// 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 })
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)
])
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viewModel.identityContext.$identity.sink {
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button.kf.setImage(
with: $0.image,
for: .normal,
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placeholder: UIImage(systemName: "line.horizontal.3"))
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}
.store(in: &cancellables)
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let processor = RoundCornerImageProcessor(radius: .widthFraction(0.5))
var imageOptions = KingfisherManager.shared.defaultOptions
imageOptions.append(.processor(processor))
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viewModel.$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 {
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KingfisherManager.shared.retrieveImage(with: image, options: imageOptions) {
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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")
}
}