metatext/View Controllers/MainNavigationViewController.swift
Justin Mazzocchi 1fabcb41cc
Follow requests
2021-01-25 22:57:44 -08:00

141 lines
5.3 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>()
private weak var presentedSecondaryNavigation: UINavigationController?
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()
setupViewControllers()
if viewModel.identityContext.identity.authenticated {
setupNewStatusButton()
}
viewModel.$presentingSecondaryNavigation.sink { [weak self] in
if $0 {
self?.presentSecondaryNavigation()
} else {
self?.dismissSecondaryNavigation()
}
}
.store(in: &cancellables)
viewModel.timelineNavigations.map { _ in }
.merge(with: viewModel.followRequestNavigations.map { _ in })
.sink { [weak self] in self?.selectedIndex = 0 }
.store(in: &cancellables)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
viewModel.refreshIdentity()
}
}
private extension MainNavigationViewController {
func setupViewControllers() {
var controllers: [UIViewController] = [
TimelinesViewController(
viewModel: viewModel,
rootViewModel: rootViewModel),
ExploreViewController(
viewModel: viewModel.exploreViewModel,
rootViewModel: rootViewModel)
]
if viewModel.identityContext.identity.authenticated {
controllers.append(NotificationsViewController(viewModel: viewModel, rootViewModel: rootViewModel))
}
if let conversationsViewModel = viewModel.conversationsViewModel {
let conversationsViewController = TableViewController(
viewModel: conversationsViewModel,
rootViewModel: rootViewModel)
conversationsViewController.tabBarItem = NavigationViewModel.Tab.messages.tabBarItem
conversationsViewController.navigationItem.title = NavigationViewModel.Tab.messages.title
controllers.append(conversationsViewController)
}
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 })
let navigationController = UINavigationController(rootViewController: hostingController)
presentedSecondaryNavigation = navigationController
present(navigationController, animated: true)
}
func dismissSecondaryNavigation() {
if presentedViewController == presentedSecondaryNavigation {
dismiss(animated: true)
}
}
}