483 lines
20 KiB
Swift
483 lines
20 KiB
Swift
//
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// NotificationViewController.swift
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// Mastodon
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//
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// Created by sxiaojian on 2021/4/12.
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//
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import Combine
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import CoreData
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import CoreDataStack
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import GameplayKit
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import MastodonSDK
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import OSLog
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import UIKit
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final class NotificationViewController: UIViewController, NeedsDependency {
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weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
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weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
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var disposeBag = Set<AnyCancellable>()
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var observations = Set<NSKeyValueObservation>()
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private(set) lazy var viewModel = NotificationViewModel(context: context)
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let segmentControl: UISegmentedControl = {
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let control = UISegmentedControl(items: [L10n.Scene.Notification.Title.everything, L10n.Scene.Notification.Title.mentions])
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control.selectedSegmentIndex = NotificationViewModel.NotificationSegment.EveryThing.rawValue
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return control
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}()
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let tableView: UITableView = {
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let tableView = ControlContainableTableView()
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tableView.separatorInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
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tableView.register(NotificationTableViewCell.self, forCellReuseIdentifier: String(describing: NotificationTableViewCell.self))
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tableView.register(NotificationStatusTableViewCell.self, forCellReuseIdentifier: String(describing: NotificationStatusTableViewCell.self))
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tableView.register(TimelineBottomLoaderTableViewCell.self, forCellReuseIdentifier: String(describing: TimelineBottomLoaderTableViewCell.self))
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tableView.rowHeight = UITableView.automaticDimension
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tableView.estimatedRowHeight = UITableView.automaticDimension
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tableView.separatorStyle = .none
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tableView.tableFooterView = UIView()
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tableView.backgroundColor = .clear
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return tableView
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}()
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let refreshControl = UIRefreshControl()
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}
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extension NotificationViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = Asset.Colors.Background.secondarySystemBackground.color
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segmentControl.translatesAutoresizingMaskIntoConstraints = false
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navigationItem.titleView = segmentControl
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NSLayoutConstraint.activate([
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segmentControl.widthAnchor.constraint(equalToConstant: 287)
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])
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segmentControl.addTarget(self, action: #selector(NotificationViewController.segmentedControlValueChanged(_:)), for: .valueChanged)
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tableView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(tableView)
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NSLayoutConstraint.activate([
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tableView.topAnchor.constraint(equalTo: view.topAnchor),
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tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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])
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tableView.refreshControl = refreshControl
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refreshControl.addTarget(self, action: #selector(NotificationViewController.refreshControlValueChanged(_:)), for: .valueChanged)
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tableView.delegate = self
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viewModel.tableView = tableView
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viewModel.contentOffsetAdjustableTimelineViewControllerDelegate = self
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viewModel.setupDiffableDataSource(for: tableView, delegate: self, dependency: self)
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viewModel.viewDidLoad.send()
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// bind refresh control
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viewModel.isFetchingLatestNotification
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.receive(on: DispatchQueue.main)
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.sink { [weak self] isFetching in
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guard let self = self else { return }
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if !isFetching {
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UIView.animate(withDuration: 0.5) { [weak self] in
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guard let self = self else { return }
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self.refreshControl.endRefreshing()
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}
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}
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}
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.store(in: &disposeBag)
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viewModel.dataSourceDidUpdated
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.receive(on: RunLoop.main)
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.sink { [weak self] in
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guard let self = self else { return }
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guard self.viewModel.needsScrollToTopAfterDataSourceUpdate else { return }
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self.viewModel.needsScrollToTopAfterDataSourceUpdate = false
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DispatchQueue.main.asyncAfter(deadline: .now() + 0.33) {
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self.scrollToTop(animated: true)
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}
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}
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.store(in: &disposeBag)
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viewModel.selectedIndex
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.removeDuplicates()
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.receive(on: DispatchQueue.main)
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.sink { [weak self] segment in
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guard let self = self else { return }
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self.segmentControl.selectedSegmentIndex = segment.rawValue
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// trigger scroll-to-top after data reload
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self.viewModel.needsScrollToTopAfterDataSourceUpdate = true
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guard let domain = self.viewModel.activeMastodonAuthenticationBox.value?.domain, let userID = self.viewModel.activeMastodonAuthenticationBox.value?.userID else {
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return
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}
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self.viewModel.needsScrollToTopAfterDataSourceUpdate = true
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switch segment {
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case .EveryThing:
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self.viewModel.notificationPredicate.value = MastodonNotification.predicate(domain: domain, userID: userID)
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case .Mentions:
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self.viewModel.notificationPredicate.value = MastodonNotification.predicate(domain: domain, userID: userID, typeRaw: Mastodon.Entity.Notification.NotificationType.mention.rawValue)
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}
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}
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.store(in: &disposeBag)
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segmentControl.observe(\.selectedSegmentIndex, options: [.new]) { [weak self] segmentControl, _ in
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guard let self = self else { return }
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// scroll to top when select same segment
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if segmentControl.selectedSegmentIndex == self.viewModel.selectedIndex.value.rawValue {
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self.scrollToTop(animated: true)
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}
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}
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.store(in: &observations)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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tableView.deselectRow(with: transitionCoordinator, animated: animated)
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// fetch latest if has unread push notification
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if context.notificationService.hasUnreadPushNotification.value {
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viewModel.loadLatestStateMachine.enter(NotificationViewModel.LoadLatestState.Loading.self)
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}
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// needs trigger manually after onboarding dismiss
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setNeedsStatusBarAppearanceUpdate()
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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DispatchQueue.main.async { [weak self] in
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guard let self = self else { return }
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if (self.viewModel.fetchedResultsController.fetchedObjects ?? []).count == 0 {
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self.viewModel.loadLatestStateMachine.enter(NotificationViewModel.LoadLatestState.Loading.self)
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}
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}
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}
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override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
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super.viewWillTransition(to: size, with: coordinator)
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coordinator.animate { _ in
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// do nothing
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} completion: { _ in
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self.tableView.reloadData()
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}
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}
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}
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extension NotificationViewController {
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@objc private func segmentedControlValueChanged(_ sender: UISegmentedControl) {
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os_log("%{public}s[%{public}ld], %{public}s: select at index: %ld", (#file as NSString).lastPathComponent, #line, #function, sender.selectedSegmentIndex)
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viewModel.selectedIndex.value = NotificationViewModel.NotificationSegment(rawValue: sender.selectedSegmentIndex)!
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}
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@objc private func refreshControlValueChanged(_ sender: UIRefreshControl) {
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guard viewModel.loadLatestStateMachine.enter(NotificationViewModel.LoadLatestState.Loading.self) else {
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sender.endRefreshing()
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return
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}
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}
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}
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// MARK: - StatusTableViewControllerAspect
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extension NotificationViewController: StatusTableViewControllerAspect { }
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// MARK: - TableViewCellHeightCacheableContainer
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extension NotificationViewController: TableViewCellHeightCacheableContainer {
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var cellFrameCache: NSCache<NSNumber, NSValue> {
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viewModel.cellFrameCache
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}
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func cacheTableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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let key = item.hashValue
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let frame = cell.frame
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viewModel.cellFrameCache.setObject(NSValue(cgRect: frame), forKey: NSNumber(value: key))
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}
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func handleTableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
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guard let diffableDataSource = viewModel.diffableDataSource else { return UITableView.automaticDimension }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return UITableView.automaticDimension }
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guard let frame = viewModel.cellFrameCache.object(forKey: NSNumber(value: item.hashValue))?.cgRectValue else {
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if case .bottomLoader = item {
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return TimelineLoaderTableViewCell.cellHeight
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} else {
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return UITableView.automaticDimension
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}
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}
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return ceil(frame.height)
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}
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}
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// MARK: - UITableViewDelegate
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extension NotificationViewController: UITableViewDelegate {
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func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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open(item: item)
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}
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}
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extension NotificationViewController {
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private func open(item: NotificationItem) {
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switch item {
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case .notification(let objectID, _):
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let notification = context.managedObjectContext.object(with: objectID) as! MastodonNotification
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if let status = notification.status {
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let viewModel = ThreadViewModel(context: context, optionalStatus: status)
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coordinator.present(scene: .thread(viewModel: viewModel), from: self, transition: .show)
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} else {
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let viewModel = ProfileViewModel(context: context, optionalMastodonUser: notification.account)
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coordinator.present(scene: .profile(viewModel: viewModel), from: self, transition: .show)
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}
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default:
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break
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}
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}
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func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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switch item {
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case .bottomLoader:
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if !tableView.isDragging, !tableView.isDecelerating {
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viewModel.loadoldestStateMachine.enter(NotificationViewModel.LoadOldestState.Loading.self)
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}
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default:
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break
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}
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}
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}
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// MARK: - ContentOffsetAdjustableTimelineViewControllerDelegate
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extension NotificationViewController: ContentOffsetAdjustableTimelineViewControllerDelegate {
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func navigationBar() -> UINavigationBar? {
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navigationController?.navigationBar
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}
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}
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// MARK: - NotificationTableViewCellDelegate
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extension NotificationViewController: NotificationTableViewCellDelegate {
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func notificationTableViewCell(_ cell: NotificationTableViewCell, notification: MastodonNotification, acceptButtonDidPressed button: UIButton) {
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viewModel.acceptFollowRequest(notification: notification)
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}
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func notificationTableViewCell(_ cell: NotificationTableViewCell, notification: MastodonNotification, rejectButtonDidPressed button: UIButton) {
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viewModel.rejectFollowRequest(notification: notification)
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}
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func userAvatarDidPressed(notification: MastodonNotification) {
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let viewModel = ProfileViewModel(context: context, optionalMastodonUser: notification.account)
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DispatchQueue.main.async {
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self.coordinator.present(scene: .profile(viewModel: viewModel), from: self, transition: .show)
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}
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}
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func parent() -> UIViewController {
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self
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}
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func notificationStatusTableViewCell(_ cell: NotificationStatusTableViewCell, statusView: StatusView, revealContentWarningButtonDidPressed button: UIButton) {
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StatusProviderFacade.responseToStatusContentWarningRevealAction(dependency: self, cell: cell)
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}
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func notificationStatusTableViewCell(_ cell: NotificationStatusTableViewCell, statusView: StatusView, contentWarningOverlayViewDidPressed contentWarningOverlayView: ContentWarningOverlayView) {
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StatusProviderFacade.responseToStatusContentWarningRevealAction(dependency: self, cell: cell)
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}
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func notificationStatusTableViewCell(_ cell: NotificationStatusTableViewCell, statusView: StatusView, playerContainerView: PlayerContainerView, contentWarningOverlayViewDidPressed contentWarningOverlayView: ContentWarningOverlayView) {
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StatusProviderFacade.responseToStatusContentWarningRevealAction(dependency: self, cell: cell)
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}
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}
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// MARK: - UIScrollViewDelegate
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extension NotificationViewController {
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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handleScrollViewDidScroll(scrollView)
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}
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}
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// MARK: - ScrollViewContainer
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extension NotificationViewController: ScrollViewContainer {
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var scrollView: UIScrollView { tableView }
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func scrollToTop(animated: Bool) {
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let indexPath = IndexPath(row: 0, section: 0)
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guard viewModel.diffableDataSource?.itemIdentifier(for: indexPath) != nil else { return }
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tableView.scrollToRow(at: indexPath, at: .top, animated: true)
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}
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}
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extension NotificationViewController: LoadMoreConfigurableTableViewContainer {
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typealias BottomLoaderTableViewCell = TimelineBottomLoaderTableViewCell
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typealias LoadingState = NotificationViewModel.LoadOldestState.Loading
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var loadMoreConfigurableTableView: UITableView { tableView }
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var loadMoreConfigurableStateMachine: GKStateMachine { viewModel.loadoldestStateMachine }
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}
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extension NotificationViewController {
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enum CategorySwitch: String, CaseIterable {
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case showEverything
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case showMentions
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var title: String {
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switch self {
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case .showEverything: return L10n.Scene.Notification.Keyobard.showEverything
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case .showMentions: return L10n.Scene.Notification.Keyobard.showMentions
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}
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}
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// UIKeyCommand input
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var input: String {
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switch self {
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case .showEverything: return "[" // + shift + command
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case .showMentions: return "]" // + shift + command
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}
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}
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var modifierFlags: UIKeyModifierFlags {
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switch self {
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case .showEverything: return [.shift, .command]
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case .showMentions: return [.shift, .command]
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}
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}
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var propertyList: Any {
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return rawValue
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}
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}
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var categorySwitchKeyCommands: [UIKeyCommand] {
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CategorySwitch.allCases.map { category in
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UIKeyCommand(
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title: category.title,
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image: nil,
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action: #selector(NotificationViewController.showCategory(_:)),
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input: category.input,
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modifierFlags: category.modifierFlags,
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propertyList: category.propertyList,
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alternates: [],
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discoverabilityTitle: nil,
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attributes: [],
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state: .off
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)
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}
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}
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@objc private func showCategory(_ sender: UIKeyCommand) {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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guard let rawValue = sender.propertyList as? String,
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let category = CategorySwitch(rawValue: rawValue) else { return }
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switch category {
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case .showEverything:
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viewModel.selectedIndex.value = .EveryThing
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case .showMentions:
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viewModel.selectedIndex.value = .Mentions
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}
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}
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override var keyCommands: [UIKeyCommand]? {
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return categorySwitchKeyCommands + navigationKeyCommands
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}
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}
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extension NotificationViewController: TableViewControllerNavigateable {
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func navigate(direction: TableViewNavigationDirection) {
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if let indexPathForSelectedRow = tableView.indexPathForSelectedRow {
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// navigate up/down on the current selected item
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navigateToStatus(direction: direction, indexPath: indexPathForSelectedRow)
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} else {
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// set first visible item selected
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navigateToFirstVisibleStatus()
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}
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}
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private func navigateToStatus(direction: TableViewNavigationDirection, indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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let items = diffableDataSource.snapshot().itemIdentifiers
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guard let selectedItem = diffableDataSource.itemIdentifier(for: indexPath),
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let selectedItemIndex = items.firstIndex(of: selectedItem) else {
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return
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}
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let _navigateToItem: NotificationItem? = {
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var index = selectedItemIndex
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while 0..<items.count ~= index {
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index = {
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switch direction {
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case .up: return index - 1
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case .down: return index + 1
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}
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}()
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guard 0..<items.count ~= index else { return nil }
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let item = items[index]
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guard Self.validNavigateableItem(item) else { continue }
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return item
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}
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return nil
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}()
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guard let item = _navigateToItem, let indexPath = diffableDataSource.indexPath(for: item) else { return }
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let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
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tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
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}
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private func navigateToFirstVisibleStatus() {
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guard let indexPathsForVisibleRows = tableView.indexPathsForVisibleRows else { return }
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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var visibleItems: [NotificationItem] = indexPathsForVisibleRows.sorted().compactMap { indexPath in
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return nil }
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guard Self.validNavigateableItem(item) else { return nil }
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return item
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}
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if indexPathsForVisibleRows.first?.row != 0, visibleItems.count > 1 {
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// drop first when visible not the first cell of table
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visibleItems.removeFirst()
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}
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guard let item = visibleItems.first, let indexPath = diffableDataSource.indexPath(for: item) else { return }
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let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
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tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
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}
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static func validNavigateableItem(_ item: NotificationItem) -> Bool {
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switch item {
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case .notification:
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return true
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default:
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return false
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}
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}
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func open() {
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guard let indexPathForSelectedRow = tableView.indexPathForSelectedRow else { return }
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPathForSelectedRow) else { return }
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open(item: item)
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}
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func navigateKeyCommandHandlerRelay(_ sender: UIKeyCommand) {
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navigateKeyCommandHandler(sender)
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}
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}
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