Move trending statuses to Explore on iPad

See #171

Tusker/Screens/Main/MainSidebarViewController.swift

@@ -41,7 +41,7 @@ class MainSidebarViewController: UIViewController {
     }
     
     var exploreTabItems: [Item] {
-        var items: [Item] = [.explore, .bookmarks, .trendingStatuses, .profileDirectory]
+        var items: [Item] = [.explore, .bookmarks, .profileDirectory]
         let snapshot = dataSource.snapshot()
         for case let .list(list) in snapshot.itemIdentifiers(inSection: .lists) {
             items.append(.list(list))
@@ -195,9 +195,6 @@ class MainSidebarViewController: UIViewController {
         discoverSnapshot.append([
             .profileDirectory,
         ], to: .discoverHeader)
-        if mastodonController.instanceFeatures.trendingStatusesAndLinks {
-            discoverSnapshot.insert([.trendingStatuses], before: .profileDirectory)
-        }
         dataSource.apply(discoverSnapshot, to: .discover)
     }
     
@@ -388,7 +385,7 @@ extension MainSidebarViewController {
     enum Item: Hashable {
         case tab(MainTabBarViewController.Tab)
         case explore, bookmarks
-        case discoverHeader, trendingStatuses, profileDirectory
+        case discoverHeader, profileDirectory
         case listsHeader, list(List), addList
         case savedHashtagsHeader, savedHashtag(Hashtag), addSavedHashtag
         case savedInstancesHeader, savedInstance(URL), addSavedInstance
@@ -403,8 +400,6 @@ extension MainSidebarViewController {
                 return "Bookmarks"
             case .discoverHeader:
                 return "Discover"
-            case .trendingStatuses:
-                return "Trending Posts"
             case .profileDirectory:
                 return "Profile Directory"
             case .listsHeader:
@@ -436,8 +431,6 @@ extension MainSidebarViewController {
                 return "magnifyingglass"
             case .bookmarks:
                 return "bookmark"
-            case .trendingStatuses:
-                return "square.text.square"
             case .profileDirectory:
                 return "person.2.fill"
             case .list(_):

Tusker/Screens/Main/MainSplitViewController.swift

@@ -232,7 +232,7 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
             
             tabBarViewController.select(tab: .explore)
             
-        case .bookmarks, .trendingStatuses, .profileDirectory, .list(_), .savedHashtag(_), .savedInstance(_):
+        case .bookmarks, .profileDirectory, .list(_), .savedHashtag(_), .savedInstance(_):
             tabBarViewController.select(tab: .explore)
             // Make sure the Explore VC doesn't show it's search bar when it appears, in case the user was previously
             // in compact mode and performing a search.
@@ -309,7 +309,7 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
                     case let instanceVC as InstanceTimelineViewController:
                         exploreItem = .savedInstance(instanceVC.instanceURL)
                     case is TrendingStatusesViewController:
-                        exploreItem = .trendingStatuses
+                        exploreItem = .explore
                     case is TrendingHashtagsViewController:
                         exploreItem = .explore
                     case is TrendingLinksViewController:
@@ -376,8 +376,6 @@ fileprivate extension MainSidebarViewController.Item {
             return SearchViewController(mastodonController: mastodonController)
         case .bookmarks:
             return BookmarksTableViewController(mastodonController: mastodonController)
-        case .trendingStatuses:
-            return TrendingStatusesViewController(mastodonController: mastodonController)
         case .profileDirectory:
             return ProfileDirectoryViewController(mastodonController: mastodonController)
         case let .list(list):

Tusker/Screens/Search/SearchViewController.swift

@@ -11,11 +11,11 @@ import Pachyderm
 import SafariServices
 import WebURLFoundationExtras
 
-class SearchViewController: UIViewController {
+class SearchViewController: UIViewController, CollectionViewController {
 
     weak var mastodonController: MastodonController!
     
-    private var collectionView: UICollectionView!
+    var collectionView: UICollectionView!
     private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
     
     var resultsController: SearchResultsViewController!
@@ -23,6 +23,8 @@ class SearchViewController: UIViewController {
     
     var searchControllerStatusOnAppearance: Bool? = nil
     
+    private var loadTask: Task<Void, Never>?
+    
     init(mastodonController: MastodonController) {
         self.mastodonController = mastodonController
         
@@ -59,8 +61,14 @@ class SearchViewController: UIViewController {
                 section.boundarySupplementaryItems = [
                     NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(12)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .topLeading)
                 ]
+                section.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 0, bottom: 16, trailing: 0)
                 return section
                 
+            case .trendingStatuses:
+                var listConfig = UICollectionLayoutListConfiguration(appearance: .grouped)
+                listConfig.headerMode = .supplementary
+                return NSCollectionLayoutSection.list(using: listConfig, layoutEnvironment: environment)
+
             default:
                 fatalError("unimplemented")
             }
@@ -100,7 +108,10 @@ class SearchViewController: UIViewController {
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         
-        Task(priority: .userInitiated) {
+        clearSelectionOnAppear(animated: animated)
+        
+        loadTask?.cancel()
+        loadTask = Task(priority: .userInitiated) {
             if (try? await mastodonController.getOwnInstance()) != nil {
                 await applySnapshot()
             }
@@ -133,6 +144,11 @@ class SearchViewController: UIViewController {
         let trendingLinkCell = UICollectionView.CellRegistration<TrendingLinkCardCollectionViewCell, Card>(cellNib: UINib(nibName: "TrendingLinkCardCollectionViewCell", bundle: .main)) { (cell, indexPath, card) in
             cell.updateUI(card: card)
         }
+        let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, CollapseState)> { [unowned self] cell, indexPath, item in
+            cell.delegate = self
+            // TODO: filter trends
+            cell.updateUI(statusID: item.0, state: item.1, filterResult: .allow, precomputedContent: nil)
+        }
         
         let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { collectionView, indexPath, item in
             switch item {
@@ -142,8 +158,8 @@ class SearchViewController: UIViewController {
             case let .link(card):
                 return collectionView.dequeueConfiguredReusableCell(using: trendingLinkCell, for: indexPath, item: card)
                 
-            default:
+            case let .status(id, state):
-                fatalError("todo")
+                return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, state))
             }
         }
         dataSource.supplementaryViewProvider = { (collectionView, elementKind, indexPath) in
@@ -168,24 +184,38 @@ class SearchViewController: UIViewController {
 
         let hashtagsReq = Client.getTrendingHashtags(limit: 5)
         async let hashtags = try? mastodonController.run(hashtagsReq).0
-        let linksReq = Client.getTrendingLinks(limit: 10)
-        async let links = try? mastodonController.run(linksReq).0
 
         if let hashtags = await hashtags {
             snapshot.appendSections([.trendingHashtags])
             snapshot.appendItems(hashtags.map { .tag($0) }, toSection: .trendingHashtags)
         }
 
-        if let links = await links {
+        if mastodonController.instanceFeatures.trendingStatusesAndLinks {
-            snapshot.appendSections([.trendingLinks])
+            let linksReq = Client.getTrendingLinks(limit: 10)
-            snapshot.appendItems(links.map { .link($0) }, toSection: .trendingLinks)
+            async let links = try? mastodonController.run(linksReq).0
+            let statusesReq = Client.getTrendingStatuses(limit: 10)
+            async let statuses = try? mastodonController.run(statusesReq).0
+
+            if let links = await links {
+                snapshot.appendSections([.trendingLinks])
+                snapshot.appendItems(links.map { .link($0) }, toSection: .trendingLinks)
+            }
+
+            if let statuses = await statuses {
+                await mastodonController.persistentContainer.addAll(statuses: statuses)
+                snapshot.appendSections([.trendingStatuses])
+                snapshot.appendItems(statuses.map { .status($0.id, .unknown) }, toSection: .trendingStatuses)
+            }
         }
 
-        await dataSource.apply(snapshot)
+        if !Task.isCancelled {
+            await dataSource.apply(snapshot)
+        }
     }
     
     @objc private func preferencesChanged() {
-        Task {
+        loadTask?.cancel()
+        loadTask = Task {
             await applySnapshot()
         }
     }
@@ -196,8 +226,8 @@ extension SearchViewController {
     enum Section {
         case trendingHashtags
         case trendingLinks
-        case trendingStatuses
         case profileSuggestions
+        case trendingStatuses
         
         var title: String {
             switch self {
@@ -206,20 +236,20 @@ extension SearchViewController {
             case .trendingLinks:
                 return "Trending Links"
             case .trendingStatuses:
-                return "Trending Statuses"
+                return "Trending Posts"
             case .profileSuggestions:
                 return "Suggested Accounts"
             }
         }
     }
     enum Item: Equatable, Hashable {
-        case status(String)
+        case status(String, CollapseState)
         case tag(Hashtag)
         case link(Card)
         
         static func == (lhs: SearchViewController.Item, rhs: SearchViewController.Item) -> Bool {
             switch (lhs, rhs) {
-            case let (.status(a), .status(b)):
+            case let (.status(a, _), .status(b, _)):
                 return a == b
             case let (.tag(a), .tag(b)):
                 return a == b
@@ -232,7 +262,7 @@ extension SearchViewController {
         
         func hash(into hasher: inout Hasher) {
             switch self {
-            case let .status(id):
+            case let .status(id, _):
                 hasher.combine("status")
                 hasher.combine(id)
             case let .tag(tag):
@@ -260,8 +290,8 @@ extension SearchViewController: UICollectionViewDelegate {
                 selected(url: url)
             }
             
-        default:
+        case let .status(id, state):
-            fatalError("todo")
+            selected(status: id, state: state.copy())
         }
     }
     
@@ -348,8 +378,16 @@ extension SearchViewController: UICollectionViewDragDelegate {
             }
             return [UIDragItem(itemProvider: NSItemProvider(object: url as NSURL))]
             
-        default:
+        case let .status(id, _):
-            fatalError("todo")
+            guard let status = mastodonController.persistentContainer.status(for: id),
+                  let url = status.url else {
+                return []
+            }
+            let provider = NSItemProvider(object: url as NSURL)
+            let activity = UserActivityManager.showConversationActivity(mainStatusID: id, accountID: mastodonController.accountInfo!.id)
+            activity.displaysAuxiliaryScene = true
+            provider.registerObject(activity, visibility: .all)
+            return [UIDragItem(itemProvider: provider)]
         }
     }
 }
@@ -363,3 +401,17 @@ extension SearchViewController: ToastableViewController {
 
 extension SearchViewController: MenuActionProvider {
 }
+
+extension SearchViewController: 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)
+        }
+    }
+    
+    func statusCellShowFiltered(_ cell: StatusCollectionViewCell) {
+        // TODO: filtering
+    }
+}