metatext/View Controllers/MainNavigationViewController.swift
2021-01-28 22:14:48 -08:00

173 lines
6.6 KiB
Swift

// Copyright © 2021 Metabolist. All rights reserved.
import Combine
import SwiftUI
import ViewModels
final class MainNavigationViewController: UITabBarController {
private let viewModel: NavigationViewModel
private let rootViewModel: RootViewModel
private var cancellables = Set<AnyCancellable>()
init(viewModel: NavigationViewModel, rootViewModel: RootViewModel) {
self.viewModel = viewModel
self.rootViewModel = rootViewModel
super.init(nibName: nil, bundle: nil)
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
viewModel.$presentingSecondaryNavigation.sink { [weak self] in
if $0 {
self?.presentSecondaryNavigation()
} else {
self?.dismissSecondaryNavigation()
}
}
.store(in: &cancellables)
viewModel.identityContext.$identity.map(\.pending)
.removeDuplicates()
.sink { [weak self] in self?.setupViewControllers(pending: $0) }
.store(in: &cancellables)
viewModel.navigations
.sink { [weak self] in self?.handle(navigation: $0) }
.store(in: &cancellables)
NotificationCenter.default.publisher(for: UIScene.willEnterForegroundNotification)
.sink { [weak self] _ in self?.viewModel.refreshIdentity() }
.store(in: &cancellables)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
viewModel.refreshIdentity()
}
}
private extension MainNavigationViewController {
static let secondaryNavigationViewTag = UUID().hashValue
func setupViewControllers(pending: Bool) {
var controllers: [UIViewController] = [
TimelinesViewController(
viewModel: viewModel,
rootViewModel: rootViewModel)
]
if viewModel.identityContext.identity.authenticated && !pending {
tabBar.isHidden = false
controllers.append(ExploreViewController(viewModel: viewModel.exploreViewModel(),
rootViewModel: rootViewModel))
controllers.append(NotificationsViewController(viewModel: viewModel, rootViewModel: rootViewModel))
let conversationsViewController = TableViewController(
viewModel: viewModel.conversationsViewModel(),
rootViewModel: rootViewModel)
conversationsViewController.tabBarItem = NavigationViewModel.Tab.messages.tabBarItem
conversationsViewController.navigationItem.title = NavigationViewModel.Tab.messages.title
controllers.append(conversationsViewController)
setupNewStatusButton()
} else {
tabBar.isHidden = true
}
let secondaryNavigationButton = SecondaryNavigationButton(viewModel: viewModel, rootViewModel: rootViewModel)
for controller in controllers {
controller.navigationItem.leftBarButtonItem = secondaryNavigationButton
}
viewControllers = controllers.map(UINavigationController.init(rootViewController:))
}
func setupNewStatusButton() {
let newStatusButtonView = NewStatusButtonView(primaryAction: UIAction { [weak self] _ in
guard let self = self else { return }
let newStatusViewModel = self.rootViewModel.newStatusViewModel(
identityContext: self.viewModel.identityContext)
let newStatusViewController = NewStatusViewController(viewModel: newStatusViewModel)
let newStatusNavigationController = UINavigationController(rootViewController: newStatusViewController)
if UIDevice.current.userInterfaceIdiom == .phone {
newStatusNavigationController.modalPresentationStyle = .overFullScreen
} else {
newStatusNavigationController.isModalInPresentation = true
}
self.present(newStatusNavigationController, animated: true)
})
view.addSubview(newStatusButtonView)
newStatusButtonView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
newStatusButtonView.widthAnchor.constraint(equalToConstant: .newStatusButtonDimension),
newStatusButtonView.heightAnchor.constraint(equalToConstant: .newStatusButtonDimension),
newStatusButtonView.trailingAnchor.constraint(
equalTo: view.safeAreaLayoutGuide.trailingAnchor,
constant: -.defaultSpacing * 2),
newStatusButtonView.bottomAnchor.constraint(equalTo: tabBar.topAnchor, constant: -.defaultSpacing * 2)
])
}
func presentSecondaryNavigation() {
let secondaryNavigationView = SecondaryNavigationView(viewModel: viewModel)
.environmentObject(rootViewModel)
let hostingController = UIHostingController(rootView: secondaryNavigationView)
hostingController.navigationItem.leftBarButtonItem = UIBarButtonItem(
systemItem: .close,
primaryAction: UIAction { [weak self] _ in self?.viewModel.presentingSecondaryNavigation = false })
hostingController.navigationItem.titleView = SecondaryNavigationTitleView(viewModel: viewModel)
let navigationController = UINavigationController(rootViewController: hostingController)
navigationController.view.tag = Self.secondaryNavigationViewTag
present(navigationController, animated: true)
}
func dismissSecondaryNavigation() {
if presentedViewController?.view.tag == Self.secondaryNavigationViewTag {
dismiss(animated: true)
}
}
func handle(navigation: Navigation) {
let vc: UIViewController
switch navigation {
case let .collection(collectionService):
vc = TableViewController(
viewModel: CollectionItemsViewModel(
collectionService: collectionService,
identityContext: viewModel.identityContext),
rootViewModel: rootViewModel)
case let .profile(profileService):
vc = ProfileViewController(
viewModel: ProfileViewModel(
profileService: profileService,
identityContext: viewModel.identityContext),
rootViewModel: rootViewModel,
identityContext: viewModel.identityContext,
parentNavigationController: nil)
default:
return
}
selectedViewController?.show(vc, sender: self)
}
}