Tusker/Screens/Explore/TrendingStatusesViewController.swift

@@ -9,163 +9,77 @@
 import UIKit
 import Pachyderm
 
-class TrendingStatusesViewController: UIViewController {
+class TrendingStatusesViewController: EnhancedTableViewController {
     
     weak var mastodonController: MastodonController!
     
-    private var collectionView: UICollectionView {
-        view as! UICollectionView
-    }
-    private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
+    private var dataSource: UITableViewDiffableDataSource<Section, Item>!
     
     init(mastodonController: MastodonController) {
         self.mastodonController = mastodonController
         
-        super.init(nibName: nil, bundle: nil)
+        super.init(style: .grouped)
         
-        title = NSLocalizedString("Trending Posts", comment: "trending posts screen title")
+        dragEnabled = true
     }
     
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func loadView() {
-        var config = UICollectionLayoutListConfiguration(appearance: .plain)
-        config.leadingSwipeActionsConfigurationProvider = { [unowned self] in
-            (collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.leadingSwipeActions()
-        }
-        config.trailingSwipeActionsConfigurationProvider = { [unowned self] in
-            (collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.trailingSwipeActions()
-        }
-        config.itemSeparatorHandler = { [unowned self] indexPath, sectionSeparatorConfiguration in
-            guard let item = self.dataSource.itemIdentifier(for: indexPath) else {
-                return sectionSeparatorConfiguration
-            }
-            var config = sectionSeparatorConfiguration
-            if item.hideSeparators {
-                config.topSeparatorVisibility = .hidden
-                config.bottomSeparatorVisibility = .hidden
-            }
-            if case .status(_, _) = item {
-                config.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
-                config.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
-            }
-            return config
-        }
-        let layout = UICollectionViewCompositionalLayout.list(using: config)
-        view = UICollectionView(frame: .zero, collectionViewLayout: layout)
-        collectionView.delegate = self
-        collectionView.dragDelegate = self
+    override func viewDidLoad() {
+        super.viewDidLoad()
 
-        dataSource = createDataSource()
-    }
+        title = NSLocalizedString("Trending Posts", comment: "trending posts screen title")
         
-    private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
-        let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, StatusState)> { [unowned self] cell, indexPath, item in
+        tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: .main), forCellReuseIdentifier: "statusCell")
+        tableView.estimatedRowHeight = 144
+        
+        dataSource = UITableViewDiffableDataSource(tableView: tableView, cellProvider: { tableView, indexPath, item in
+            let cell = tableView.dequeueReusableCell(withIdentifier: "statusCell", for: indexPath) as! TimelineStatusTableViewCell
             cell.delegate = self
-            cell.updateUI(statusID: item.0, state: item.1)
-        }
-        let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, _, _ in
-            cell.indicator.startAnimating()
-        }
-        return UICollectionViewDiffableDataSource(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
-            switch itemIdentifier {
-            case .status(id: let id, state: let state):
-                return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, state))
-            case .loadingIndicator:
-                return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
-            }
-        }
+            cell.updateUI(statusID: item.id, state: item.state)
+            return cell
+        })
     }
 
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         
-        var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
-        snapshot.appendSections([.statuses])
-        snapshot.appendItems([.loadingIndicator])
-        dataSource.apply(snapshot, animatingDifferences: false)
-        
+        let request = Client.getTrendingStatuses()
         Task {
-            await loadTrendingStatuses()
-        }
-    }
-    
-    private func loadTrendingStatuses() async {
-        let statuses: [Status]
-        do {
-            statuses = try await mastodonController.run(Client.getTrendingStatuses()).0
-        } catch {
-            var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
-            await dataSource.apply(snapshot)
-            let config = ToastConfiguration(from: error, with: "Loading Trending Posts", in: self) { toast in
-                toast.dismissToast(animated: true)
-                await self.loadTrendingStatuses()
-            }
-            showToast(configuration: config, animated: true)
+            guard let (statuses, _) = try? await mastodonController.run(request) else {
                 return
             }
-        await mastodonController.persistentContainer.addAll(statuses: statuses)
+            mastodonController.persistentContainer.addAll(statuses: statuses) {
                 var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
                 snapshot.appendSections([.statuses])
-        snapshot.appendItems(statuses.map { .status(id: $0.id, state: .unknown) })
-        await dataSource.apply(snapshot)
+                snapshot.appendItems(statuses.map { Item(id: $0.id, state: .unknown) })
+                self.dataSource.apply(snapshot)
             }
         }
+    }
+    
+    // MARK: - Table View Delegate
+}
 
 extension TrendingStatusesViewController {
     enum Section {
         case statuses
     }
-    enum Item: Hashable {
-        case status(id: String, state: StatusState)
-        case loadingIndicator
+    struct Item: Hashable {
+        let id: String
+        let state: StatusState
         
-        var hideSeparators: Bool {
-            if case .loadingIndicator = self {
-                return true
-            } else {
-                return false
-            }
+        static func ==(lhs: Item, rhs: Item) -> Bool {
+            return lhs.id == rhs.id
         }
         
-        var isSelectable: Bool {
-            if case .status(id: _, state: _) = self {
-                return true
-            } else {
-                return false
+        func hash(into hasher: inout Hasher) {
+            hasher.combine(id)
         }
     }
 }
-}
-
-extension TrendingStatusesViewController: UICollectionViewDelegate {
-    func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
-        return dataSource.itemIdentifier(for: indexPath)?.isSelectable ?? false
-    }
-    
-    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
-        guard case .status(id: let id, state: let state) = dataSource.itemIdentifier(for: indexPath) else {
-            return
-        }
-        selected(status: id, state: state.copy())
-    }
-    
-    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
-        return (collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.contextMenuConfiguration()
-    }
-    
-    func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
-        MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
-    }
-}
-
-extension TrendingStatusesViewController: UICollectionViewDragDelegate {
-    func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
-        (collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.dragItemsForBeginning(session: session) ?? []
-    }
-}
 
 extension TrendingStatusesViewController: TuskerNavigationDelegate {
     var apiController: MastodonController! { mastodonController }
@@ -177,19 +91,9 @@ extension TrendingStatusesViewController: ToastableViewController {
 extension TrendingStatusesViewController: MenuActionProvider {
 }
 
-extension TrendingStatusesViewController: StatusCollectionViewCellDelegate {
-    func statusCellNeedsReconfigure(_ cell: StatusCollectionViewCell, animated: Bool, completion: (() -> Void)?) {
-        if let indexPath = collectionView.indexPath(for: cell) {
-            var snapshot = dataSource.snapshot()
-            snapshot.reconfigureItems([dataSource.itemIdentifier(for: indexPath)!])
-            dataSource.apply(snapshot, animatingDifferences: animated, completion: completion)
-        }
-    }
-}
-
-extension TrendingStatusesViewController: StatusBarTappableViewController {
-    func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
-        collectionView.scrollToTop()
-        return .stop
+extension TrendingStatusesViewController: StatusTableViewCellDelegate {
+    func statusCellCollapsedStateChanged(_ cell: BaseStatusTableViewCell) {
+        tableView.beginUpdates()
+        tableView.endUpdates()
     }
 }

Tusker/Views/Profile Header/ProfileHeaderView.swift

@@ -86,11 +86,6 @@ class ProfileHeaderView: UIView {
     }
     
     private func createObservers() {
-        // mastodonController may be nil if the ProfileViewController is deinit'd before the header is even created
-        guard let mastodonController else {
-            return
-        }
-        
         cancellables = []
         
         mastodonController.persistentContainer.accountSubject