metatext/Views/UIKit/SecondaryNavigationButton.swift
2021-02-22 15:59:33 -08:00

74 lines
2.6 KiB
Swift

// Copyright © 2021 Metabolist. All rights reserved.
import Combine
import SDWebImage
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.accessibilityLabel = NSLocalizedString("secondary-navigation-button.accessibility-title", comment: "")
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.sd_setImage(
with: $0.image,
for: .normal,
placeholderImage: UIImage(systemName: "line.horizontal.3"))
}
.store(in: &cancellables)
let imageTransformer = SDImageRoundCornerTransformer(
radius: .greatestFiniteMagnitude,
corners: .allCorners,
borderWidth: 0,
borderColor: nil)
viewModel.$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 {
SDWebImageManager.shared.loadImage(
with: image,
options: [.transformAnimatedImage],
context: [.imageTransformer: imageTransformer],
progress: nil) { (image, _, _, _, _, _) in
action.image = image
completion([action])
}
} else {
completion([action])
}
}
})
}
.store(in: &cancellables)
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}