Status actions pipeline

View Controllers/StatusListViewController.swift

@@ -78,6 +78,15 @@ final class StatusListViewController: UITableViewController {
             }
             .store(in: &cancellables)
 
+        viewModel.statusEvents.sink { [weak self] in
+            switch $0 {
+            case .ignorableOutput, .statusListNavigation, .urlNavigation: break
+            case let .share(url):
+                self?.share(url: url)
+            }
+        }
+        .store(in: &cancellables)
+
         viewModel.$loading
             .receive(on: RunLoop.main)
             .sink { [weak self] in
@@ -146,6 +155,12 @@ extension StatusListViewController: UITableViewDataSourcePrefetching {
 }
 
 private extension StatusListViewController {
+    func share(url: URL) {
+        let activityViewController = UIActivityViewController(activityItems: [url], applicationActivities: nil)
+
+        present(activityViewController, animated: true, completion: nil)
+    }
+
     func sizeTableHeaderFooterViews() {
         // https://useyourloaf.com/blog/variable-height-table-view-header/
         if let headerView = tableView.tableHeaderView {

ViewModels/Sources/ViewModels/StatusListViewModel.swift

@@ -9,15 +9,18 @@ public final class StatusListViewModel: ObservableObject {
     @Published public private(set) var statusIDs = [[String]]()
     @Published public var alertItem: AlertItem?
     @Published public private(set) var loading = false
+    public let statusEvents: AnyPublisher<StatusViewModel.Event, Never>
     public private(set) var maintainScrollPositionOfStatusID: String?
 
     private var statuses = [String: Status]()
     private let statusListService: StatusListService
     private var statusViewModelCache = [Status: (StatusViewModel, AnyCancellable)]()
+    private let statusEventsSubject = PassthroughSubject<StatusViewModel.Event, Never>()
     private var cancellables = Set<AnyCancellable>()
 
     init(statusListService: StatusListService) {
         self.statusListService = statusListService
+        statusEvents = statusEventsSubject.eraseToAnyPublisher()
 
         statusListService.statusSections
             .combineLatest(statusListService.filters.map { $0.regularExpression() })
@@ -54,15 +57,16 @@ public extension StatusListViewModel {
         guard let status = statuses[id] else { return nil }
 
         var statusViewModel: StatusViewModel
-
+        
         if let cachedViewModel = statusViewModelCache[status]?.0 {
             statusViewModel = cachedViewModel
         } else {
             statusViewModel = StatusViewModel(statusService: statusListService.statusService(status: status))
-            statusViewModelCache[status] = (statusViewModel, statusViewModel.events
-                .flatMap { $0 }
-                .assignErrorsToAlertItem(to: \.alertItem, on: self)
-                .sink { _ in })
+            statusViewModelCache[status] = (statusViewModel,
+                                            statusViewModel.events
+                                                .flatMap { $0 }
+                                                .assignErrorsToAlertItem(to: \.alertItem, on: self)
+                                                .sink { [weak self] in self?.statusEventsSubject.send($0) })
         }
 
         statusViewModel.isContextParent = status.id == statusListService.contextParentID

ViewModels/Sources/ViewModels/StatusViewModel.swift

@@ -22,10 +22,10 @@ public struct StatusViewModel {
     public var isReplyInContext = false
     public var hasReplyFollowing = false
     public var sensitiveContentToggled = false
-    public let events: AnyPublisher<AnyPublisher<Never, Error>, Never>
+    public let events: AnyPublisher<AnyPublisher<Event, Error>, Never>
 
     private let statusService: StatusService
-    private let eventsInput = PassthroughSubject<AnyPublisher<Never, Error>, Never>()
+    private let eventsSubject = PassthroughSubject<AnyPublisher<Event, Error>, Never>()
 
     init(statusService: StatusService) {
         self.statusService = statusService
@@ -45,7 +45,16 @@ public struct StatusViewModel {
             .map(AttachmentViewModel.init(attachment:))
         pollOptionTitles = statusService.status.displayStatus.poll?.options.map { $0.title } ?? []
         pollEmoji = statusService.status.displayStatus.poll?.emojis ?? []
-        events = eventsInput.eraseToAnyPublisher()
+        events = eventsSubject.eraseToAnyPublisher()
+    }
+}
+
+public extension StatusViewModel {
+    enum Event {
+        case ignorableOutput
+        case statusListNavigation(StatusListViewModel)
+        case urlNavigation(URL)
+        case share(URL)
     }
 }
 
@@ -108,7 +117,13 @@ public extension StatusViewModel {
     }
 
     func toggleFavorited() {
-        eventsInput.send(statusService.toggleFavorited())
+        eventsSubject.send(statusService.toggleFavorited().map { _ in Event.ignorableOutput }.eraseToAnyPublisher())
+    }
+
+    func shareStatus() {
+        guard let url = statusService.status.displayStatus.url else { return }
+
+        eventsSubject.send(Just(Event.share(url)).setFailureType(to: Error.self).eraseToAnyPublisher())
     }
 }
 

Views/Status/StatusView.swift

@@ -148,6 +148,10 @@ private extension StatusView {
         favoriteButton.addAction(favoriteAction, for: .touchUpInside)
         contextParentFavoriteButton.addAction(favoriteAction, for: .touchUpInside)
 
+        let shareAction = UIAction { [weak self] _ in self?.statusConfiguration.viewModel.shareStatus() }
+
+        shareButton.addAction(shareAction, for: .touchUpInside)
+
         applyStatusConfiguration()
     }