Rewrite TrendingStatusesViewController to use collection view
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@ -9,77 +9,163 @@
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import UIKit
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import Pachyderm
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class TrendingStatusesViewController: EnhancedTableViewController {
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class TrendingStatusesViewController: UIViewController {
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weak var mastodonController: MastodonController!
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private var dataSource: UITableViewDiffableDataSource<Section, Item>!
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private var collectionView: UICollectionView {
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view as! UICollectionView
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}
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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init(mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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super.init(style: .grouped)
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super.init(nibName: nil, bundle: nil)
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dragEnabled = true
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title = NSLocalizedString("Trending Posts", comment: "trending posts screen title")
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}
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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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override func loadView() {
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var config = UICollectionLayoutListConfiguration(appearance: .plain)
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config.leadingSwipeActionsConfigurationProvider = { [unowned self] in
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(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.leadingSwipeActions()
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}
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config.trailingSwipeActionsConfigurationProvider = { [unowned self] in
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(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.trailingSwipeActions()
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}
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config.itemSeparatorHandler = { [unowned self] indexPath, sectionSeparatorConfiguration in
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guard let item = self.dataSource.itemIdentifier(for: indexPath) else {
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return sectionSeparatorConfiguration
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}
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var config = sectionSeparatorConfiguration
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if item.hideSeparators {
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config.topSeparatorVisibility = .hidden
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config.bottomSeparatorVisibility = .hidden
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}
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if case .status(_, _) = item {
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config.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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config.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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}
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return config
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}
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let layout = UICollectionViewCompositionalLayout.list(using: config)
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view = UICollectionView(frame: .zero, collectionViewLayout: layout)
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collectionView.delegate = self
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collectionView.dragDelegate = self
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title = NSLocalizedString("Trending Posts", comment: "trending posts screen title")
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dataSource = createDataSource()
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}
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tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: .main), forCellReuseIdentifier: "statusCell")
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tableView.estimatedRowHeight = 144
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dataSource = UITableViewDiffableDataSource(tableView: tableView, cellProvider: { tableView, indexPath, item in
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let cell = tableView.dequeueReusableCell(withIdentifier: "statusCell", for: indexPath) as! TimelineStatusTableViewCell
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private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
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let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, StatusState)> { [unowned self] cell, indexPath, item in
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cell.delegate = self
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cell.updateUI(statusID: item.id, state: item.state)
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return cell
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})
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cell.updateUI(statusID: item.0, state: item.1)
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}
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let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, _, _ in
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cell.indicator.startAnimating()
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}
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return UICollectionViewDiffableDataSource(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
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switch itemIdentifier {
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case .status(id: let id, state: let state):
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return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, state))
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case .loadingIndicator:
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return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
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}
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}
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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let request = Client.getTrendingStatuses()
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Task {
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guard let (statuses, _) = try? await mastodonController.run(request) else {
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return
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}
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mastodonController.persistentContainer.addAll(statuses: statuses) {
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.statuses])
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snapshot.appendItems(statuses.map { Item(id: $0.id, state: .unknown) })
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self.dataSource.apply(snapshot)
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}
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snapshot.appendItems([.loadingIndicator])
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dataSource.apply(snapshot, animatingDifferences: false)
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Task {
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await loadTrendingStatuses()
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}
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}
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// MARK: - Table View Delegate
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private func loadTrendingStatuses() async {
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let statuses: [Status]
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do {
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statuses = try await mastodonController.run(Client.getTrendingStatuses()).0
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} catch {
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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await dataSource.apply(snapshot)
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let config = ToastConfiguration(from: error, with: "Loading Trending Posts", in: self) { toast in
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toast.dismissToast(animated: true)
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await self.loadTrendingStatuses()
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}
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showToast(configuration: config, animated: true)
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return
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}
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await mastodonController.persistentContainer.addAll(statuses: statuses)
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.statuses])
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snapshot.appendItems(statuses.map { .status(id: $0.id, state: .unknown) })
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await dataSource.apply(snapshot)
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}
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}
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extension TrendingStatusesViewController {
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enum Section {
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case statuses
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}
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struct Item: Hashable {
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let id: String
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let state: StatusState
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enum Item: Hashable {
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case status(id: String, state: StatusState)
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case loadingIndicator
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static func ==(lhs: Item, rhs: Item) -> Bool {
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return lhs.id == rhs.id
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var hideSeparators: Bool {
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if case .loadingIndicator = self {
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return true
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} else {
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return false
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}
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}
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func hash(into hasher: inout Hasher) {
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hasher.combine(id)
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var isSelectable: Bool {
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if case .status(id: _, state: _) = self {
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return true
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} else {
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return false
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}
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}
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}
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}
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extension TrendingStatusesViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
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return dataSource.itemIdentifier(for: indexPath)?.isSelectable ?? false
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}
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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guard case .status(id: let id, state: let state) = dataSource.itemIdentifier(for: indexPath) else {
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return
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}
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selected(status: id, state: state.copy())
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}
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func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
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return (collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.contextMenuConfiguration()
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}
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func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
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MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
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}
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}
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extension TrendingStatusesViewController: UICollectionViewDragDelegate {
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func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
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(collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.dragItemsForBeginning(session: session) ?? []
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}
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}
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extension TrendingStatusesViewController: TuskerNavigationDelegate {
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var apiController: MastodonController! { mastodonController }
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@ -91,9 +177,19 @@ extension TrendingStatusesViewController: ToastableViewController {
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extension TrendingStatusesViewController: MenuActionProvider {
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}
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extension TrendingStatusesViewController: StatusTableViewCellDelegate {
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func statusCellCollapsedStateChanged(_ cell: BaseStatusTableViewCell) {
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tableView.beginUpdates()
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tableView.endUpdates()
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extension TrendingStatusesViewController: StatusCollectionViewCellDelegate {
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func statusCellNeedsReconfigure(_ cell: StatusCollectionViewCell, animated: Bool, completion: (() -> Void)?) {
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if let indexPath = collectionView.indexPath(for: cell) {
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var snapshot = dataSource.snapshot()
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snapshot.reconfigureItems([dataSource.itemIdentifier(for: indexPath)!])
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dataSource.apply(snapshot, animatingDifferences: animated, completion: completion)
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}
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}
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}
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extension TrendingStatusesViewController: StatusBarTappableViewController {
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func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
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collectionView.scrollToTop()
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return .stop
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}
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}
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