Simplify NSUserActivity construction code

Closes #32

Tusker.xcodeproj/project.pbxproj

@@ -221,6 +221,7 @@
 		D68FEC4F232C5BC300C84F23 /* SegmentedPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */; };
 		D690797324A4EF9700023A34 /* UIBezierPath+Helpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = D690797224A4EF9700023A34 /* UIBezierPath+Helpers.swift */; };
 		D691771129A2B76A0054D7EF /* MainActor+Unsafe.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691771029A2B76A0054D7EF /* MainActor+Unsafe.swift */; };
+		D691771529A6FCAB0054D7EF /* StateRestorableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691771429A6FCAB0054D7EF /* StateRestorableViewController.swift */; };
 		D693A72825CF282E003A14E2 /* TrendingHashtagsViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D693A72725CF282E003A14E2 /* TrendingHashtagsViewController.swift */; };
 		D693A72A25CF8C1E003A14E2 /* ProfileDirectoryViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D693A72925CF8C1E003A14E2 /* ProfileDirectoryViewController.swift */; };
 		D693A72F25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D693A72D25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.swift */; };
@@ -637,6 +638,7 @@
 		D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SegmentedPageViewController.swift; sourceTree = "<group>"; };
 		D690797224A4EF9700023A34 /* UIBezierPath+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIBezierPath+Helpers.swift"; sourceTree = "<group>"; };
 		D691771029A2B76A0054D7EF /* MainActor+Unsafe.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "MainActor+Unsafe.swift"; sourceTree = "<group>"; };
+		D691771429A6FCAB0054D7EF /* StateRestorableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StateRestorableViewController.swift; sourceTree = "<group>"; };
 		D693A72725CF282E003A14E2 /* TrendingHashtagsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TrendingHashtagsViewController.swift; sourceTree = "<group>"; };
 		D693A72925CF8C1E003A14E2 /* ProfileDirectoryViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProfileDirectoryViewController.swift; sourceTree = "<group>"; };
 		D693A72D25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FeaturedProfileCollectionViewCell.swift; sourceTree = "<group>"; };
@@ -1495,6 +1497,7 @@
 				D6E0DC8D216EDF1E00369478 /* Previewing.swift */,
 				D6B81F3B2560365300F6E31D /* RefreshableViewController.swift */,
 				D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */,
+				D691771429A6FCAB0054D7EF /* StateRestorableViewController.swift */,
 				D63CC7112911F57C000E19DE /* StatusBarTappableViewController.swift */,
 				D6412B0224AFF6A600F5412E /* TabBarScrollableViewController.swift */,
 				D6B22A0E2560D52D004D82EF /* TabbedPageViewController.swift */,
@@ -2120,6 +2123,7 @@
 				D64AAE9526C88C5000FC57FB /* ToastableViewController.swift in Sources */,
 				D6895DE928D962C2006341DA /* TimelineLikeController.swift in Sources */,
 				D6A3A3822956123A0036B6EF /* TimelinePosition.swift in Sources */,
+				D691771529A6FCAB0054D7EF /* StateRestorableViewController.swift in Sources */,
 				D6E0DC8E216EDF1E00369478 /* Previewing.swift in Sources */,
 				D6B93667281D937300237D0E /* MainSidebarMyProfileCollectionViewCell.swift in Sources */,
 				D61F75BD293D099600C0B37F /* Lazy.swift in Sources */,

Tusker/Screens/Conversation/ConversationViewController.swift

@@ -412,6 +412,21 @@ extension ConversationViewController: TuskerNavigationDelegate {
     var apiController: MastodonController! { mastodonController }
 }
 
+extension ConversationViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        if let accountID = mastodonController.accountInfo?.id,
+           case .localID(let id) = mode {
+            return UserActivityManager.showConversationActivity(mainStatusID: id, accountID: accountID)
+        } else {
+            return nil
+        }
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+        fatalError("ConversationViewController must be reconstructed, not restored")
+    }
+}
+
 extension ConversationViewController: ToastableViewController {
     var toastScrollView: UIScrollView? {
         if case .displaying(let vc) = state {

Tusker/Screens/Explore/ExploreViewController.swift

@@ -531,6 +531,34 @@ extension ExploreViewController {
     }
 }
 
+extension ExploreViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        if searchController.isActive {
+            return UserActivityManager.searchActivity(query: searchController.searchBar.text, accountID: mastodonController.accountInfo!.id)
+        } else {
+            return nil
+        }
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+        guard let type = UserActivityType(rawValue: activity.activityType) else {
+            return
+        }
+        if type == .bookmarks {
+            show(BookmarksViewController(mastodonController: mastodonController), sender: nil)
+        } else if type == .search {
+            loadViewIfNeeded()
+            searchController.isActive = true
+            if let query = UserActivityManager.getSearchQuery(from: activity),
+               !query.isEmpty {
+                searchController.searchBar.text = query
+            } else {
+                searchController.searchBar.becomeFirstResponder()
+            }
+        }
+    }
+}
+
 extension ExploreViewController: InstanceTimelineViewControllerDelegate {
     func didSaveInstance(url: URL) {
         dismiss(animated: true) {
@@ -553,7 +581,7 @@ extension ExploreViewController: UICollectionViewDragDelegate {
         let provider: NSItemProvider
         switch item {
         case .bookmarks:
-            let activity = UserActivityManager.bookmarksActivity()
+            let activity = UserActivityManager.bookmarksActivity(accountID: accountID)
             activity.displaysAuxiliaryScene = true
             provider = NSItemProvider(object: activity)
         case let .list(list):

Tusker/Screens/Local Predicate Statuses List/BookmarksViewController.swift

@@ -18,6 +18,8 @@ class BookmarksViewController: LocalPredicateStatusesViewController {
             request: { Client.getBookmarks(range: $0) },
             mastodonController: mastodonController
         )
+        
+        userActivity = UserActivityManager.bookmarksActivity(accountID: mastodonController.accountInfo!.id)
     }
     
     required init?(coder: NSCoder) {
@@ -25,3 +27,12 @@ class BookmarksViewController: LocalPredicateStatusesViewController {
     }
 
 }
+
+extension BookmarksViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        return UserActivityManager.bookmarksActivity(accountID: mastodonController.accountInfo!.id)
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+    }
+}

Tusker/Screens/Main/MainSidebarViewController.swift

@@ -304,15 +304,15 @@ class MainSidebarViewController: UIViewController {
         
         switch item {
         case .tab(.notifications):
-            return UserActivityManager.checkNotificationsActivity(mode: Preferences.shared.defaultNotificationsMode)
+            return UserActivityManager.checkNotificationsActivity(mode: Preferences.shared.defaultNotificationsMode, accountID: id)
         case .tab(.compose):
             return UserActivityManager.newPostActivity(accountID: id)
         case .explore:
-            return UserActivityManager.searchActivity()
+            return UserActivityManager.searchActivity(query: nil, accountID: id)
         case .bookmarks:
-            return UserActivityManager.bookmarksActivity()
+            return UserActivityManager.bookmarksActivity(accountID: id)
         case .tab(.myProfile):
-            return UserActivityManager.myProfileActivity()
+            return UserActivityManager.myProfileActivity(accountID: id)
         case let .list(list):
             return UserActivityManager.showTimelineActivity(timeline: .list(id: list.id), accountID: id)
         case let .savedHashtag(tag):

Tusker/Screens/Main/MainSplitViewController.swift

@@ -398,36 +398,76 @@ extension MainSplitViewController: TuskerNavigationDelegate {
     var apiController: MastodonController! { mastodonController }
 }
 
-extension MainSplitViewController: TuskerRootViewController {
+extension MainSplitViewController: StateRestorableViewController {
     func stateRestorationActivity() -> NSUserActivity? {
         if traitCollection.horizontalSizeClass == .compact {
             return tabBarViewController.stateRestorationActivity()
-        } else {
+        } else if let currentItem = sidebar.selectedItem,
-            if let timelinePages = navigationStackFor(item: .tab(.timelines))?.first as? TimelinesPageViewController {
+                  let navStack = navigationStackFor(item: currentItem),
-                return timelinePages.stateRestorationActivity()
+                  let top = navStack.last as? StateRestorableViewController {
+            return top.stateRestorationActivity()
         } else {
             stateRestorationLogger.fault("MainSplitViewController: Unable to create state restoration activity")
             return nil
         }
     }
-    }
     
     func restoreActivity(_ activity: NSUserActivity) {
-        if traitCollection.horizontalSizeClass == .compact {
+        guard traitCollection.horizontalSizeClass != .compact else {
             tabBarViewController.restoreActivity(activity)
-        } else {
-            if activity.activityType == UserActivityType.showTimeline.rawValue {
-                guard let timelinePages = navigationStackFor(item: .tab(.timelines))?.first as? TimelinesPageViewController else {
-                    stateRestorationLogger.fault("MainSplitViewController: Unable to restore timeline activity, couldn't find VC")
             return
         }
-                timelinePages.restoreActivity(activity)
+        guard let type = UserActivityType(rawValue: activity.activityType) else {
-            } else {
+            return
-                stateRestorationLogger.fault("MainSplitViewController: Unable to restore activity of unexpected type \(activity.activityType, privacy: .public)")
-            }
-        }
         }
         
+        let item: MainSidebarViewController.Item
+        var needsRestore = true
+        switch type {
+        case .showTimeline:
+            item = .tab(.timelines)
+        case .checkNotifications:
+            item = .tab(.notifications)
+        case .search:
+            item = .explore
+        case .bookmarks:
+            item = .bookmarks
+        case .myProfile:
+            item = .tab(.myProfile)
+            needsRestore = false
+        case .newPost:
+            return
+        case .showConversation, .showProfile:
+            item = .tab(.timelines)
+        default:
+            stateRestorationLogger.fault("MainSplitViewController: Unable to restore activity of unexpected type \(activity.activityType, privacy: .public)")
+            return
+        }
+        
+        sidebar.select(item: item, animated: false)
+        select(item: item)
+        
+        if type == .showConversation {
+            if let statusID = UserActivityManager.getConversationStatus(from: activity) {
+                let conv = ConversationViewController(for: statusID, state: .unknown, mastodonController: mastodonController)
+                secondaryNavController.show(conv, sender: nil)
+            }
+        } else if type == .showProfile {
+            if let accountID = UserActivityManager.getProfile(from: activity) {
+                let profile = ProfileViewController(accountID: accountID, mastodonController: mastodonController)
+                secondaryNavController.show(profile, sender: nil)
+            }
+        } else if needsRestore {
+            if let vc = secondaryNavController.viewControllers.first as? StateRestorableViewController {
+                vc.restoreActivity(activity)
+            } else {
+                stateRestorationLogger.fault("MainSplitViewController: Unable to restore activity, couldn't find StateRestorableViewController")
+            }
+        }
+    }
+}
+
+extension MainSplitViewController: TuskerRootViewController {
     @objc func presentCompose() {
         self.compose()
     }

Tusker/Screens/Main/MainTabBarViewController.swift

@@ -240,14 +240,14 @@ extension MainTabBarViewController: TuskerNavigationDelegate {
     var apiController: MastodonController! { mastodonController }
 }
 
-extension MainTabBarViewController: TuskerRootViewController {
+extension MainTabBarViewController: StateRestorableViewController {
     func stateRestorationActivity() -> NSUserActivity? {
-        let nav = viewController(for: .timelines) as! UINavigationController
+        let nav = viewController(for: selectedTab) as! UINavigationController
         var activity: NSUserActivity?
-        if let timelinePages = nav.viewControllers.first as? TimelinesPageViewController {
+        if let vc = nav.topViewController as? StateRestorableViewController {
-            activity = timelinePages.stateRestorationActivity()
+            activity = vc.stateRestorationActivity()
         } else {
-            stateRestorationLogger.fault("MainTabBarViewController: Unable to create state restoration activity, couldn't find timeline/page VC")
+            stateRestorationLogger.fault("MainTabBarViewController: Unable to create state restoration activity, couldn't find StateRestorableViewController")
         }
         if let presentedNav = presentedViewController as? UINavigationController,
            let compose = presentedNav.viewControllers.first as? ComposeHostingController {
@@ -257,6 +257,10 @@ extension MainTabBarViewController: TuskerRootViewController {
     }
     
     func restoreActivity(_ activity: NSUserActivity) {
+        guard let type = UserActivityType(rawValue: activity.activityType) else {
+            return
+        }
+        
         func restoreEditedDraft() {
             // on iOS 16+, this is handled by the duckable container
             if #unavailable(iOS 16.0),
@@ -265,22 +269,50 @@ extension MainTabBarViewController: TuskerRootViewController {
             }
         }
         
-        if activity.activityType == UserActivityType.showTimeline.rawValue {
+        let tab: Tab
-            let nav = viewController(for: .timelines) as! UINavigationController
+        switch type {
-            guard let timelinePages = nav.viewControllers.first as? TimelinesPageViewController else {
+        case .showTimeline:
-                stateRestorationLogger.fault("MainTabBarViewController: Unable to restore timeline activity, couldn't find VC")
+            tab = .timelines
-                return
+        case .checkNotifications:
-            }
+            tab = .notifications
-            timelinePages.restoreActivity(activity)
+        case .search, .bookmarks:
-            restoreEditedDraft()
+            tab = .explore
-        } else if activity.activityType == UserActivityType.newPost.rawValue {
+        case .myProfile:
+            tab = .myProfile
+        case .newPost:
             restoreEditedDraft()
             return
-        } else {
+        case .showConversation, .showProfile:
+            tab = .timelines
+        default:
             stateRestorationLogger.fault("MainTabBarViewController: Unable to restore activity of unexpected type \(activity.activityType, privacy: .public)")
-        }
+            return
         }
         
+        select(tab: tab)
+        let nav = viewController(for: tab) as! UINavigationController
+        
+        if type == .showConversation {
+            if let statusID = UserActivityManager.getConversationStatus(from: activity) {
+                let conv = ConversationViewController(for: statusID, state: .unknown, mastodonController: mastodonController)
+                nav.pushViewController(conv, animated: false)
+            }
+        } else if type == .showProfile {
+            if let accountID = UserActivityManager.getProfile(from: activity) {
+                let profile = ProfileViewController(accountID: accountID, mastodonController: mastodonController)
+                nav.pushViewController(profile, animated: false)
+            }
+        } else if type == .bookmarks {
+            nav.pushViewController(BookmarksViewController(mastodonController: mastodonController), animated: false)
+        } else if let vc = nav.viewControllers.first as? StateRestorableViewController {
+            vc.restoreActivity(activity)
+        } else {
+            stateRestorationLogger.fault("MainTabBarViewController: Unable to restore activity, couldn't find StateRestorableViewController")
+        }
+    }
+}
+
+extension MainTabBarViewController: TuskerRootViewController {
     @objc func presentCompose() {
         compose()
     }

Tusker/Screens/Main/TuskerRootViewController.swift

@@ -8,9 +8,7 @@
 
 import UIKit
 
-protocol TuskerRootViewController: UIViewController, StatusBarTappableViewController {
+protocol TuskerRootViewController: UIViewController, StateRestorableViewController, StatusBarTappableViewController {
-    func stateRestorationActivity() -> NSUserActivity?
-    func restoreActivity(_ activity: NSUserActivity)
     func presentCompose()
     func select(tab: MainTabBarViewController.Tab)
     func getTabController(tab: MainTabBarViewController.Tab) -> UIViewController?

Tusker/Screens/Notifications/NotificationsPageViewController.swift

@@ -22,7 +22,7 @@ class NotificationsPageViewController: SegmentedPageViewController<Notifications
         super.init(pages: [.all, .mentions]) { page in
             let vc = NotificationsTableViewController(allowedTypes: page.allowedTypes, mastodonController: mastodonController)
             vc.title = page.title
-            vc.userActivity = page.userActivity
+            vc.userActivity = page.userActivity(accountID: mastodonController.accountInfo!.id)
             return vc
         }
         
@@ -48,7 +48,6 @@ class NotificationsPageViewController: SegmentedPageViewController<Notifications
         case .mentionsOnly:
             page = .mentions
         }
-        segmentedControl.setSelectedOption(page, animated: false)
         selectPage(page, animated: false)
     }
     
@@ -80,14 +79,26 @@ class NotificationsPageViewController: SegmentedPageViewController<Notifications
             }
         }
         
-        var userActivity: NSUserActivity {
+        func userActivity(accountID: String) -> NSUserActivity {
             switch self {
             case .all:
-                return UserActivityManager.checkNotificationsActivity(mode: .allNotifications)
+                return UserActivityManager.checkNotificationsActivity(mode: .allNotifications, accountID: accountID)
             case .mentions:
-                return UserActivityManager.checkNotificationsActivity(mode: .mentionsOnly)
+                return UserActivityManager.checkNotificationsActivity(mode: .mentionsOnly, accountID: accountID)
             }
         }
     }
 
 }
+
+extension NotificationsPageViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        return currentPage.userActivity(accountID: mastodonController.accountInfo!.id)
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+        if let mode = UserActivityManager.getNotificationsMode(from: activity) {
+            selectMode(mode)
+        }
+    }
+}

Tusker/Screens/Profile/MyProfileViewController.swift

@@ -39,7 +39,11 @@ class MyProfileViewController: ProfileViewController {
         
         NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
         
-        userActivity = UserActivityManager.myProfileActivity()
+        userActivity = UserActivityManager.myProfileActivity(accountID: mastodonController.accountInfo!.id)
+    }
+    
+    override func stateRestorationActivity() -> NSUserActivity? {
+        return UserActivityManager.myProfileActivity(accountID: mastodonController.accountInfo!.id)
     }
     
     private func setAvatarTabBarImage<Account: AccountProtocol>(account: Account) {

Tusker/Screens/Profile/ProfileViewController.swift

@@ -10,7 +10,7 @@ import UIKit
 import Pachyderm
 import Combine
 
-class ProfileViewController: UIViewController {
+class ProfileViewController: UIViewController, StateRestorableViewController {
     
     weak var mastodonController: MastodonController!
     
@@ -285,6 +285,20 @@ class ProfileViewController: UIViewController {
             compose(editing: draft)
         }
     }
+    
+    // MARK: StateRestorableViewController
+    func stateRestorationActivity() -> NSUserActivity? {
+        if let accountID,
+           let accountInfo = mastodonController.accountInfo {
+            return UserActivityManager.showProfileActivity(id: accountID, accountID: accountInfo.id)
+        } else {
+            return nil
+        }
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+        fatalError("ProfileViewController must be reconstructed, not restored")
+    }
 }
 
 extension ProfileViewController {

Tusker/Screens/Search/SearchResultsViewController.swift

@@ -104,7 +104,7 @@ class SearchResultsViewController: UIViewController, CollectionViewController {
             .filter { $0 != self.currentQuery }
             .sink(receiveValue: performSearch(query:))
 
-        userActivity = UserActivityManager.searchActivity()
+        userActivity = UserActivityManager.searchActivity(query: nil, accountID: mastodonController.accountInfo!.id)
         
         NotificationCenter.default.addObserver(self, selector: #selector(handleStatusDeleted), name: .statusDeleted, object: nil)
     }

Tusker/Screens/Timeline/TimelinesPageViewController.swift

@@ -105,22 +105,6 @@ class TimelinesPageViewController: SegmentedPageViewController<TimelinesPageView
         self.selectPage(Page(mastodonController: mastodonController, timeline: timeline), animated: animated)
     }
     
-    func stateRestorationActivity() -> NSUserActivity? {
-        return (currentViewController as? TimelineViewController)?.stateRestorationActivity()
-    }
-    
-    func restoreActivity(_ activity: NSUserActivity) {
-        guard let timeline = UserActivityManager.getTimeline(from: activity),
-              let pinned = PinnedTimeline(timeline: timeline) else {
-            return
-        }
-        let page = Page(mastodonController: mastodonController, timeline: pinned)
-        // the pinned timelines may have changed after an iCloud sync, in which case don't restore anything
-        if pages.contains(page) {
-            selectPage(page, animated: false)
-        }
-    }
-    
     @objc private func customizePressed() {
         present(UIHostingController(rootView: CustomizeTimelinesView(mastodonController: mastodonController)), animated: true)
     }
@@ -222,3 +206,21 @@ extension TimelinesPageViewController: TimelineViewControllerDelegate {
         }
     }
 }
+
+extension TimelinesPageViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        return (currentViewController as? TimelineViewController)?.stateRestorationActivity()
+    }
+    
+    func restoreActivity(_ activity: NSUserActivity) {
+        guard let timeline = UserActivityManager.getTimeline(from: activity),
+              let pinned = PinnedTimeline(timeline: timeline) else {
+            return
+        }
+        let page = Page(mastodonController: mastodonController, timeline: pinned)
+        // the pinned timelines may have changed after an iCloud sync, in which case don't restore anything
+        if pages.contains(page) {
+            selectPage(page, animated: false)
+        }
+    }
+}

Tusker/Screens/Utilities/SegmentedPageViewController.swift

@@ -19,7 +19,7 @@ class SegmentedPageViewController<Page: SegmentedPageViewControllerPage>: UIView
     private var pageControllers = [Page: UIViewController]()
     
     private var initialPage: Page
-    private var currentPage: Page
+    private(set) var currentPage: Page
     var currentIndex: Int! {
         pages.firstIndex(of: currentPage)
     }

Tusker/Screens/Utilities/StateRestorableViewController.swift

@@ -0,0 +1,15 @@
+//
+//  StateRestorableViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 2/22/23.
+//  Copyright © 2023 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+protocol StateRestorableViewController: UIViewController {
+    func stateRestorationActivity() -> NSUserActivity?
+    
+    func restoreActivity(_ activity: NSUserActivity)
+}

Tusker/Shortcuts/NSUserActivity+Extensions.swift

@@ -34,8 +34,11 @@ extension NSUserActivity {
         }
     }
 
-    convenience init(type: UserActivityType) {
+    convenience init(type: UserActivityType, accountID: String) {
         self.init(activityType: type.rawValue)
+        self.userInfo = [
+            "accountID": accountID
+        ]
     }
     
     func handleResume(manager: UserActivityManager) -> Bool {

Tusker/Shortcuts/UserActivityManager.swift

@@ -47,7 +47,7 @@ class UserActivityManager {
     
     // MARK: - Main Scene
     static func mainSceneActivity(accountID: String?) -> NSUserActivity {
-        let activity = NSUserActivity(type: .mainScene)
+        let activity = NSUserActivity(activityType: UserActivityType.mainScene.rawValue)
         if let accountID {
             activity.userInfo = [
                 "accountID": accountID,
@@ -59,11 +59,8 @@ class UserActivityManager {
     // MARK: - New Post
     static func newPostActivity(mentioning: Account? = nil, accountID: String) -> NSUserActivity {
         // todo: update to use managed objects
-        let activity = NSUserActivity(type: .newPost)
+        let activity = NSUserActivity(type: .newPost, accountID: accountID)
         activity.isEligibleForPrediction = true
-        activity.userInfo = [
-            "accountID": accountID,
-        ]
         if let mentioning = mentioning {
             activity.userInfo!["mentioning"] = mentioning.acct
             activity.title = "Send a message to \(mentioning.displayName)"
@@ -85,11 +82,10 @@ class UserActivityManager {
     }
     
     static func editDraftActivity(id: UUID, accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .newPost)
+        let activity = NSUserActivity(type: .newPost, accountID: accountID)
-        activity.userInfo = [
+        activity.addUserInfoEntries(from: [
-            "accountID": accountID,
             "draftID": id.uuidString,
-        ]
+        ])
         return activity
     }
     
@@ -130,8 +126,8 @@ class UserActivityManager {
     }
     
     // MARK: - Check Notifications
-    static func checkNotificationsActivity(mode: NotificationsMode = .allNotifications) -> NSUserActivity {
+    static func checkNotificationsActivity(mode: NotificationsMode = .allNotifications, accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .checkNotifications)
+        let activity = NSUserActivity(type: .checkNotifications, accountID: accountID)
         activity.isEligibleForPrediction = true
         activity.addUserInfoEntries(from: [
             "notificationsMode": mode.rawValue
@@ -169,12 +165,11 @@ class UserActivityManager {
     static func showTimelineActivity(timeline: Timeline, accountID: String) -> NSUserActivity? {
         guard let timelineData = try? encoder.encode(timeline) else { return nil }
         
-        let activity = NSUserActivity(type: .showTimeline)
+        let activity = NSUserActivity(type: .showTimeline, accountID: accountID)
         activity.isEligibleForPrediction = true
-        activity.userInfo = [
+        activity.addUserInfoEntries(from: [
             "timelineData": timelineData,
-            "accountID": accountID,
+        ])
-        ]
         switch timeline {
         case .home:
             activity.title = NSLocalizedString("Show Home Timeline", comment: "home timeline shortcut title")
@@ -229,11 +224,10 @@ class UserActivityManager {
     
     // MARK: - Show Conversation
     static func showConversationActivity(mainStatusID: String, accountID: String, isEligibleForPrediction: Bool = false) -> NSUserActivity {
-        let activity = NSUserActivity(type: .showConversation)
+        let activity = NSUserActivity(type: .showConversation, accountID: accountID)
-        activity.userInfo = [
+        activity.addUserInfoEntries(from: [
             "mainStatusID": mainStatusID,
-            "accountID": accountID,
+        ])
-        ]
         activity.isEligibleForPrediction = isEligibleForPrediction
         return activity
     }
@@ -244,14 +238,21 @@ class UserActivityManager {
     
     // MARK: - Explore
 
-    static func searchActivity() -> NSUserActivity {
+    static func searchActivity(query: String?, accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .search)
+        let activity = NSUserActivity(type: .search, accountID: accountID)
+        if let query {
+            activity.userInfo!["query"] = query
+        }
         activity.isEligibleForPrediction = true
         activity.title = NSLocalizedString("Search", comment: "search shortcut title")
         activity.suggestedInvocationPhrase = NSLocalizedString("Search the fediverse", comment: "search shortcut invocation phrase")
         return activity
     }
     
+    static func getSearchQuery(from activity: NSUserActivity) -> String? {
+        return activity.userInfo?["query"] as? String
+    }
+    
     func handleSearch(activity: NSUserActivity) {
         let mainViewController = getMainViewController()
         mainViewController.select(tab: .explore)
@@ -260,12 +261,17 @@ class UserActivityManager {
             navigationController.popToRootViewController(animated: false)
             exploreController.loadViewIfNeeded()
             exploreController.searchController.isActive = true
+            if let query = Self.getSearchQuery(from: activity),
+               !query.isEmpty {
+                exploreController.searchController.searchBar.text = query
+            } else {
                 exploreController.searchController.searchBar.becomeFirstResponder()
             }
         }
+    }
 
-    static func bookmarksActivity() -> NSUserActivity {
+    static func bookmarksActivity(accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .bookmarks)
+        let activity = NSUserActivity(type: .bookmarks, accountID: accountID)
         activity.isEligibleForPrediction = true
         activity.title = NSLocalizedString("View Bookmarks", comment: "bookmarks shortcut title")
         activity.suggestedInvocationPhrase = NSLocalizedString("Show my bookmarks in Tusker", comment: "bookmarks shortcut invocation phrase")
@@ -282,8 +288,8 @@ class UserActivityManager {
     }
     
     // MARK: - My Profile
-    static func myProfileActivity() -> NSUserActivity {
+    static func myProfileActivity(accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .myProfile)
+        let activity = NSUserActivity(type: .myProfile, accountID: accountID)
         activity.isEligibleForPrediction = true
         activity.title = NSLocalizedString("My Profile", comment: "my profile shortcut title")
         activity.suggestedInvocationPhrase = NSLocalizedString("Show my Mastodon profile", comment: "my profile shortuct invocation phrase")
@@ -297,12 +303,11 @@ class UserActivityManager {
     
     // MARK: - Show Profile
     static func showProfileActivity(id profileID: String, accountID: String) -> NSUserActivity {
-        let activity = NSUserActivity(type: .showProfile)
+        let activity = NSUserActivity(type: .showProfile, accountID: accountID)
-        activity.userInfo = [
+        activity.addUserInfoEntries(from: [
             "profileID": profileID,
-            "accountID": accountID,
+        ])
-        ]
+        activity.isEligibleForPrediction = true
-        // todo: should this be eligible for prediction?
         return activity
     }