mirror of
https://github.com/metabolist/metatext.git
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589 lines
23 KiB
Swift
589 lines
23 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import AVKit
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import Combine
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import Kingfisher
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import Mastodon
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import SafariServices
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import SwiftUI
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import ViewModels
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// swiftlint:disable file_length
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class TableViewController: UITableViewController {
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var transitionViewTag = -1
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private let viewModel: CollectionViewModel
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private let rootViewModel: RootViewModel
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private let loadingTableFooterView = LoadingTableFooterView()
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private let webfingerIndicatorView = WebfingerIndicatorView()
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@Published private var loading = false
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private var visibleLoadMoreViews = Set<LoadMoreView>()
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private var cancellables = Set<AnyCancellable>()
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private var cellHeightCaches = [CGFloat: [CollectionItem: CGFloat]]()
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private var shouldKeepPlayingVideoAfterDismissal = false
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private let insetBottom: Bool
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private weak var parentNavigationController: UINavigationController?
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private lazy var dataSource: TableViewDataSource = {
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.init(tableView: tableView, viewModel: viewModel)
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}()
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init(viewModel: CollectionViewModel,
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rootViewModel: RootViewModel,
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insetBottom: Bool = true,
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parentNavigationController: UINavigationController? = nil) {
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self.viewModel = viewModel
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self.rootViewModel = rootViewModel
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self.insetBottom = insetBottom
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self.parentNavigationController = parentNavigationController
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super.init(style: .plain)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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tableView.dataSource = dataSource
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tableView.prefetchDataSource = self
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tableView.cellLayoutMarginsFollowReadableWidth = true
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tableView.tableFooterView = UIView()
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tableView.contentInset.bottom = bottomInset
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tableView.isAccessibilityElement = false
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tableView.shouldGroupAccessibilityChildren = true
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if viewModel.canRefresh {
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refreshControl = UIRefreshControl()
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refreshControl?.addAction(
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UIAction { [weak self] _ in
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self?.refreshIfAble() },
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for: .valueChanged)
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}
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view.addSubview(webfingerIndicatorView)
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webfingerIndicatorView.translatesAutoresizingMaskIntoConstraints = false
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NSLayoutConstraint.activate([
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webfingerIndicatorView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),
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webfingerIndicatorView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor)
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])
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setupViewModelBindings()
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viewModel.request(maxId: nil, minId: nil, search: nil)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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refreshIfAble()
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}
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override func scrollViewDidScroll(_ scrollView: UIScrollView) {
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guard scrollView.isDragging else { return }
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let up = scrollView.panGestureRecognizer.translation(in: scrollView.superview).y > 0
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for loadMoreView in visibleLoadMoreViews {
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loadMoreView.directionChanged(up: up)
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}
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}
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override func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
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for loadMoreView in visibleLoadMoreViews {
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loadMoreView.finalizeDirectionChange()
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}
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}
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override func tableView(_ tableView: UITableView,
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willDisplay cell: UITableViewCell,
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forRowAt indexPath: IndexPath) {
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guard let item = dataSource.itemIdentifier(for: indexPath) else { return }
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var heightCache = cellHeightCaches[tableView.frame.width] ?? [CollectionItem: CGFloat]()
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heightCache[item] = cell.frame.height
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cellHeightCaches[tableView.frame.width] = heightCache
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if !loading,
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indexPath.section == dataSource.numberOfSections(in: tableView) - 1,
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indexPath.row == dataSource.tableView(tableView, numberOfRowsInSection: indexPath.section) - 1 {
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viewModel.requestNextPage(fromIndexPath: indexPath)
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}
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if let loadMoreView = cell.contentView as? LoadMoreView {
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visibleLoadMoreViews.insert(loadMoreView)
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}
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}
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override func tableView(_ tableView: UITableView,
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didEndDisplaying cell: UITableViewCell,
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forRowAt indexPath: IndexPath) {
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if let loadMoreView = cell.contentView as? LoadMoreView {
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visibleLoadMoreViews.remove(loadMoreView)
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}
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}
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override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
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guard let item = dataSource.itemIdentifier(for: indexPath) else { return UITableView.automaticDimension }
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return cellHeightCaches[tableView.frame.width]?[item]
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?? item.estimatedHeight(width: tableView.readableContentGuide.layoutFrame.width,
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identityContext: viewModel.identityContext)
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}
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override func tableView(_ tableView: UITableView, shouldHighlightRowAt indexPath: IndexPath) -> Bool {
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if case .loadMore = dataSource.itemIdentifier(for: indexPath), UIAccessibility.isVoiceOverRunning {
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return false
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}
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return viewModel.canSelect(indexPath: indexPath)
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}
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override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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tableView.deselectRow(at: indexPath, animated: true)
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viewModel.select(indexPath: indexPath)
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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sizeTableHeaderFooterViews()
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}
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}
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extension TableViewController {
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func report(reportViewModel: ReportViewModel) {
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let reportViewController = ReportViewController(viewModel: reportViewModel)
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let navigationController = UINavigationController(rootViewController: reportViewController)
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present(navigationController, animated: true)
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}
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func sizeTableHeaderFooterViews() {
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// https://useyourloaf.com/blog/variable-height-table-view-header/
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if let headerView = tableView.tableHeaderView {
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let size = headerView.systemLayoutSizeFitting(
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CGSize(width: tableView.frame.width, height: .greatestFiniteMagnitude),
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withHorizontalFittingPriority: .required,
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verticalFittingPriority: .fittingSizeLevel)
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if headerView.frame.size.height != size.height {
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headerView.frame.size.height = size.height
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tableView.tableHeaderView = headerView
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tableView.layoutIfNeeded()
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}
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view.insertSubview(webfingerIndicatorView, aboveSubview: headerView)
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}
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if let footerView = tableView.tableFooterView {
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let size = footerView.systemLayoutSizeFitting(
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CGSize(width: tableView.frame.width, height: .greatestFiniteMagnitude),
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withHorizontalFittingPriority: .required,
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verticalFittingPriority: .fittingSizeLevel)
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if footerView.frame.size.height != size.height {
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footerView.frame.size.height = size.height
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tableView.tableFooterView = footerView
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tableView.layoutIfNeeded()
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}
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}
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}
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func handle(navigation: Navigation) {
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switch navigation {
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case let .collection(collectionService):
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let vc = TableViewController(
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viewModel: CollectionItemsViewModel(
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collectionService: collectionService,
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identityContext: viewModel.identityContext),
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rootViewModel: rootViewModel,
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parentNavigationController: parentNavigationController)
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if let parentNavigationController = parentNavigationController {
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parentNavigationController.pushViewController(vc, animated: true)
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} else {
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show(vc, sender: self)
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}
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case let .profile(profileService):
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let vc = ProfileViewController(
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viewModel: ProfileViewModel(
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profileService: profileService,
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identityContext: viewModel.identityContext),
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rootViewModel: rootViewModel,
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identityContext: viewModel.identityContext,
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parentNavigationController: parentNavigationController)
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if let parentNavigationController = parentNavigationController {
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parentNavigationController.pushViewController(vc, animated: true)
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} else {
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show(vc, sender: self)
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}
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case let .notification(notificationService):
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navigate(toNotification: notificationService.notification)
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case let .url(url):
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if viewModel.identityContext.appPreferences.useUniversalLinks {
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UIApplication.shared.open(url, options: [.universalLinksOnly: true]) { success in
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if !success {
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self.open(url: url)
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}
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}
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} else {
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open(url: url)
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}
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case .searchScope:
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break
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case .webfingerStart:
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webfingerIndicatorView.startAnimating()
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case .webfingerEnd:
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webfingerIndicatorView.stopAnimating()
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}
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}
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}
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extension TableViewController: UITableViewDataSourcePrefetching {
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func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
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let urls = indexPaths.compactMap(dataSource.itemIdentifier(for:))
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.reduce(Set<URL>()) { $0.union($1.mediaPrefetchURLs(identityContext: viewModel.identityContext)) }
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var imageOptions = KingfisherManager.shared.defaultOptions
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imageOptions.append(.requestModifier(PrefetchRequestModifier()))
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for url in urls {
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KingfisherManager.shared.retrieveImage(with: url, completionHandler: nil)
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}
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}
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}
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extension TableViewController: AVPlayerViewControllerDelegate {
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func playerViewController(
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_ playerViewController: AVPlayerViewController,
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willEndFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator) {
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try? AVAudioSession.sharedInstance().setCategory(.ambient, mode: .default)
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playerViewController.player?.isMuted = true
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coordinator.animate(alongsideTransition: nil) { _ in
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if self.shouldKeepPlayingVideoAfterDismissal {
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playerViewController.player?.play()
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}
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}
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}
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}
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extension TableViewController: ZoomAnimatorDelegate {
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func transitionWillStartWith(zoomAnimator: ZoomAnimator) {
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view.layoutIfNeeded()
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guard let imageViewController = (presentedViewController as? ImageNavigationController)?.currentViewController
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else { return }
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if imageViewController.playerView.tag != 0 {
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transitionViewTag = imageViewController.playerView.tag
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} else if imageViewController.imageView.tag != 0 {
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transitionViewTag = imageViewController.imageView.tag
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}
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}
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func transitionDidEndWith(zoomAnimator: ZoomAnimator) {
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}
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func referenceView(for zoomAnimator: ZoomAnimator) -> UIView? {
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view.viewWithTag(transitionViewTag)
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}
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func referenceViewFrameInTransitioningView(for zoomAnimator: ZoomAnimator) -> CGRect? {
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guard let referenceView = referenceView(for: zoomAnimator) else { return nil }
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return parent?.view.convert(referenceView.frame, from: referenceView.superview)
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}
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}
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extension TableViewController: ScrollableToTop {
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func scrollToTop(animated: Bool) {
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tableView.scrollToTop(animated: animated)
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}
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}
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private extension TableViewController {
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static let bottomInset: CGFloat = .newStatusButtonDimension + .defaultSpacing * 4
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static let loadingFooterDebounceInterval: TimeInterval = 0.75
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var bottomInset: CGFloat { insetBottom ? Self.bottomInset : 0 }
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// swiftlint:disable:next function_body_length
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func setupViewModelBindings() {
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viewModel.title.sink { [weak self] in self?.navigationItem.title = $0 }.store(in: &cancellables)
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viewModel.titleLocalizationComponents.receive(on: DispatchQueue.main).sink { [weak self] in
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guard let key = $0.first else { return }
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self?.navigationItem.title = String(
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format: NSLocalizedString(key, comment: ""),
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arguments: Array($0.suffix(from: 1)))
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}
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.store(in: &cancellables)
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viewModel.updates.receive(on: DispatchQueue.main)
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.sink { [weak self] in self?.update($0) }
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.store(in: &cancellables)
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viewModel.events.receive(on: DispatchQueue.main)
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.sink { [weak self] in self?.handle(event: $0) }
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.store(in: &cancellables)
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viewModel.expandAll.receive(on: DispatchQueue.main)
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.sink { [weak self] in self?.set(expandAllState: $0) }
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.store(in: &cancellables)
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viewModel.loading.receive(on: DispatchQueue.main).assign(to: &$loading)
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$loading.combineLatest(
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$loading.debounce(
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for: .seconds(Self.loadingFooterDebounceInterval),
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scheduler: DispatchQueue.main))
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.sink { [weak self] loading, debouncedLoading in
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guard let self = self else { return }
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let refreshControlVisibile = self.refreshControl?.isRefreshing ?? false
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if !loading, refreshControlVisibile {
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self.refreshControl?.endRefreshing()
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}
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self.tableView.tableFooterView =
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loading && debouncedLoading && !refreshControlVisibile ? self.loadingTableFooterView : UIView()
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self.sizeTableHeaderFooterViews()
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}
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.store(in: &cancellables)
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viewModel.alertItems
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.compactMap { $0 }
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.sink { [weak self] in self?.present(alertItem: $0) }
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.store(in: &cancellables)
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tableView.publisher(for: \.contentOffset)
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.compactMap { [weak self] _ in self?.tableView.indexPathsForVisibleRows?.first }
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.sink { [weak self] in self?.viewModel.viewedAtTop(indexPath: $0) }
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.store(in: &cancellables)
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NotificationCenter.default.publisher(for: UIScene.willEnterForegroundNotification)
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.merge(with: NotificationCenter.default.publisher(for: NewStatusViewController.newStatusPostedNotification))
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.sink { [weak self] _ in self?.refreshIfAble() }
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.store(in: &cancellables)
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}
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func update(_ update: CollectionUpdate) {
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let positionMaintenanceOffset: CGFloat
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let preUpdateContentOffsetY = tableView.contentOffset.y
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var setPreviousOffset = false
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if let itemId = update.maintainScrollPositionItemId,
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let indexPath = dataSource.indexPath(itemId: itemId) {
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positionMaintenanceOffset = tableView.rectForRow(at: indexPath).origin.y
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- tableView.safeAreaInsets.top - preUpdateContentOffsetY
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} else {
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positionMaintenanceOffset = 0
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}
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if let headerView = tableView.tableHeaderView,
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let headerViewWindowFrame = view.window?.convert(headerView.frame, from: headerView),
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headerViewWindowFrame.maxY > 0 {
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setPreviousOffset = true
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}
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self.dataSource.apply(update.sections.snapshot(), animatingDifferences: false) { [weak self] in
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guard let self = self else { return }
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if let itemId = update.maintainScrollPositionItemId,
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let indexPath = self.dataSource.indexPath(itemId: itemId),
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!self.tableView.isDragging,
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!self.tableView.isDecelerating {
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if update.shouldAdjustContentInset {
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self.tableView.contentInset.bottom = max(
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self.tableView.safeAreaLayoutGuide.layoutFrame.height
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- self.tableView.rectForRow(at: indexPath).height,
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self.bottomInset)
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}
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self.tableView.scrollToRow(at: indexPath, at: .top, animated: false)
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self.tableView.contentOffset.y -= positionMaintenanceOffset
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} else if setPreviousOffset {
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self.tableView.contentOffset.y = preUpdateContentOffsetY
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}
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}
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}
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func handle(event: CollectionItemEvent) {
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switch event {
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case .ignorableOutput:
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break
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case .refresh:
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refreshIfAble()
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case let .share(url):
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share(url: url)
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case let .navigation(navigation):
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handle(navigation: navigation)
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case let .attachment(attachmentViewModel, statusViewModel):
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present(attachmentViewModel: attachmentViewModel, statusViewModel: statusViewModel)
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case let .compose(inReplyToViewModel, redraft):
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compose(inReplyToViewModel: inReplyToViewModel, redraft: redraft)
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case let .confirmDelete(statusViewModel, redraft):
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confirmDelete(statusViewModel: statusViewModel, redraft: redraft)
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case let .report(reportViewModel):
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report(reportViewModel: reportViewModel)
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case let .accountListEdit(accountViewModel, edit):
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accountListEdit(accountViewModel: accountViewModel, edit: edit)
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}
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}
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func navigate(toNotification: MastodonNotification) {
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guard let item = dataSource.snapshot().itemIdentifiers.first(where: {
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guard case let .notification(notification, _) = $0 else { return false }
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return notification.id == toNotification.id
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}),
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let indexPath = dataSource.indexPath(for: item)
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else { return }
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tableView.scrollToRow(at: indexPath, at: .none, animated: !UIAccessibility.isReduceMotionEnabled)
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viewModel.select(indexPath: indexPath)
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}
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func open(url: URL) {
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if viewModel.identityContext.appPreferences.openLinksInDefaultBrowser {
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UIApplication.shared.open(url)
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} else {
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present(SFSafariViewController(url: url), animated: true)
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}
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}
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func present(attachmentViewModel: AttachmentViewModel, statusViewModel: StatusViewModel) {
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switch attachmentViewModel.attachment.type {
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case .audio, .video:
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let playerViewController = AVPlayerViewController()
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let player: AVPlayer
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if attachmentViewModel.attachment.type == .video {
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player = PlayerCache.shared.player(url: attachmentViewModel.attachment.url)
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} else {
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player = AVPlayer(url: attachmentViewModel.attachment.url)
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}
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playerViewController.delegate = self
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playerViewController.player = player
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shouldKeepPlayingVideoAfterDismissal = attachmentViewModel.shouldAutoplay
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present(playerViewController, animated: true) {
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try? AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
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player.isMuted = false
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player.play()
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}
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case .image, .gifv:
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let imagePageViewController = ImagePageViewController(
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initiallyVisible: attachmentViewModel,
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statusViewModel: statusViewModel)
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let imageNavigationController = ImageNavigationController(imagePageViewController: imagePageViewController)
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imageNavigationController.transitionController.fromDelegate = self
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transitionViewTag = attachmentViewModel.tag
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present(imageNavigationController, animated: true)
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case .unknown:
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break
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}
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}
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func compose(inReplyToViewModel: StatusViewModel?, redraft: Status?) {
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rootViewModel.navigationViewModel?.presentedNewStatusViewModel = rootViewModel.newStatusViewModel(
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identityContext: viewModel.identityContext,
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inReplyTo: inReplyToViewModel,
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redraft: redraft)
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}
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func confirmDelete(statusViewModel: StatusViewModel, redraft: Bool) {
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let deleteAndRedraftConfirmMessage: String
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let deleteConfirmMessage: String
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switch viewModel.identityContext.appPreferences.statusWord {
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case .toot:
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deleteAndRedraftConfirmMessage = NSLocalizedString("status.delete-and-redraft.confirm.toot", comment: "")
|
|
deleteConfirmMessage = NSLocalizedString("status.delete.confirm.toot", comment: "")
|
|
case .post:
|
|
deleteAndRedraftConfirmMessage = NSLocalizedString("status.delete-and-redraft.confirm.post", comment: "")
|
|
deleteConfirmMessage = NSLocalizedString("status.delete.confirm.post", comment: "")
|
|
}
|
|
|
|
let alertController = UIAlertController(
|
|
title: nil,
|
|
message: redraft
|
|
? deleteAndRedraftConfirmMessage
|
|
: deleteConfirmMessage,
|
|
preferredStyle: .alert)
|
|
|
|
let deleteAction = UIAlertAction(
|
|
title: redraft
|
|
? NSLocalizedString("status.delete-and-redraft", comment: "")
|
|
: NSLocalizedString("status.delete", comment: ""),
|
|
style: .destructive) { _ in
|
|
redraft ? statusViewModel.deleteAndRedraft() : statusViewModel.delete()
|
|
}
|
|
let cancelAction = UIAlertAction(title: NSLocalizedString("cancel", comment: ""), style: .cancel) { _ in }
|
|
|
|
alertController.addAction(deleteAction)
|
|
alertController.addAction(cancelAction)
|
|
|
|
present(alertController, animated: true)
|
|
}
|
|
|
|
func accountListEdit(accountViewModel: AccountViewModel, edit: CollectionItemEvent.AccountListEdit) {
|
|
viewModel.applyAccountListEdit(viewModel: accountViewModel, edit: edit)
|
|
}
|
|
|
|
func set(expandAllState: ExpandAllState) {
|
|
switch expandAllState {
|
|
case .hidden:
|
|
navigationItem.rightBarButtonItem = nil
|
|
case .expand:
|
|
navigationItem.rightBarButtonItem = UIBarButtonItem(
|
|
title: NSLocalizedString("status.show-more-all-button.accessibilty-label", comment: ""),
|
|
image: UIImage(systemName: "eye"),
|
|
primaryAction: UIAction { [weak self] _ in self?.viewModel.toggleExpandAll() })
|
|
case .collapse:
|
|
navigationItem.rightBarButtonItem = UIBarButtonItem(
|
|
title: NSLocalizedString("status.show-less-all-button.accessibilty-label", comment: ""),
|
|
image: UIImage(systemName: "eye.slash"),
|
|
primaryAction: UIAction { [weak self] _ in self?.viewModel.toggleExpandAll() })
|
|
}
|
|
}
|
|
|
|
func share(url: URL) {
|
|
let activityViewController = UIActivityViewController(
|
|
activityItems: [url],
|
|
applicationActivities: [OpenInDefaultBrowserActivity()])
|
|
|
|
if UIDevice.current.userInterfaceIdiom == .pad {
|
|
guard let sourceView = tableView.viewWithTag(url.hashValue) else { return }
|
|
|
|
activityViewController.popoverPresentationController?.sourceView = sourceView
|
|
}
|
|
|
|
present(activityViewController, animated: true, completion: nil)
|
|
}
|
|
|
|
func refreshIfAble() {
|
|
if viewModel.canRefresh {
|
|
viewModel.request(maxId: nil, minId: nil, search: nil)
|
|
}
|
|
}
|
|
}
|
|
// swiftlint:enable file_length
|