feat: Implement navigating followed tags

Mastodon/Scene/Profile/FollowedTags/FollowedTagsTableViewCell.swift

@@ -24,9 +24,11 @@ final class FollowedTagsTableViewCell: UITableViewCell {
     }
     
     override func prepareForReuse() {
+        hashtagView.removeFromSuperview()
         viewModel = nil
-        hashtagView = HashtagTimelineHeaderView()
+        hashtagView = nil
         super.prepareForReuse()
+        setup()
     }
 }
 

Mastodon/Scene/Profile/FollowedTags/FollowedTagsViewController.swift

@@ -61,5 +61,17 @@ extension FollowedTagsViewController {
         view.addSubview(tableView)
         tableView.pinToParent()
         viewModel.setupTableView(tableView)
+        
+        viewModel.presentHashtagTimeline
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] hashtagTimelineViewModel in
+                guard let self = self else { return }
+                _ = self.coordinator.present(
+                    scene: .hashtagTimeline(viewModel: hashtagTimelineViewModel),
+                    from: self,
+                    transition: .show
+                )
+            }
+            .store(in: &disposeBag)
     }
 }

Mastodon/Scene/Profile/FollowedTags/FollowedTagsViewModel.swift

@@ -24,6 +24,9 @@ final class FollowedTagsViewModel: NSObject {
     let context: AppContext
     let authContext: AuthContext
     
+    // output
+    let presentHashtagTimeline = PassthroughSubject<HashtagTimelineViewModel, Never>()
+    
     init(context: AppContext, authContext: AuthContext) {
         self.context = context
         self.authContext = authContext
@@ -115,6 +118,21 @@ extension FollowedTagsViewModel: UITableViewDataSource {
 
 extension FollowedTagsViewModel: UITableViewDelegate {
     func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): \(indexPath)")
         tableView.deselectRow(at: indexPath, animated: true)
+
+        guard
+            indexPath.section == 0,
+            let object = fetchedResultsController.records[indexPath.row].object(in: context.managedObjectContext)
+        else {
+            return
+        }
+
+        let hashtagTimelineViewModel = HashtagTimelineViewModel(
+            context: self.context,
+            authContext: self.authContext,
+            hashtag: object.name
+        )
+        presentHashtagTimeline.send(hashtagTimelineViewModel)
     }
 }

MastodonSDK/Sources/MastodonCore/FetchedResultsController/FollowedTagsFetchedResultController.swift

@@ -31,6 +31,7 @@ public final class FollowedTagsFetchedResultController: NSObject {
         self.fetchedResultsController = {
             let fetchRequest = Tag.sortedFetchRequest
             fetchRequest.predicate = Tag.predicate(domain: domain, following: true, by: user)
+            fetchRequest.sortDescriptors = Tag.defaultSortDescriptors
             fetchRequest.returnsObjectsAsFaults = false
             fetchRequest.fetchBatchSize = 20
             let controller = NSFetchedResultsController(
@@ -74,17 +75,11 @@ public final class FollowedTagsFetchedResultController: NSObject {
 
 // MARK: - NSFetchedResultsControllerDelegate
 extension FollowedTagsFetchedResultController: NSFetchedResultsControllerDelegate {
-    public func controller(_ controller: NSFetchedResultsController<NSFetchRequestResult>, didChangeContentWith snapshot: NSDiffableDataSourceSnapshotReference) {
+    public func controllerDidChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
         os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
         
         let objects = fetchedResultsController.fetchedObjects ?? []
-        
-        let items: [NSManagedObjectID] = objects
-//            .compactMap { object in
-//                indexes.firstIndex(of: object.id).map { index in (index, object) }
-//            }
-//            .sorted { $0.0 < $1.0 }
-            .map { $0.objectID }
-        self._objectIDs.value = items
+        self._objectIDs.value = objects.map { $0.objectID }
+
     }
 }