Add ability to save and view instance public timelines

Pachyderm/Client.swift

@@ -81,7 +81,7 @@ public class Client {
     }
     
     func createURLRequest<Result>(request: Request<Result>) -> URLRequest? {
-        guard var components = URLComponents(url: baseURL, resolvingAgainstBaseURL: true) else { return nil }
+        guard var components = URLComponents(url: request.baseURL ?? baseURL, resolvingAgainstBaseURL: true) else { return nil }
         components.path = request.path
         components.queryItems = request.queryParameters.queryItems
         guard let url = components.url else { return nil }

Pachyderm/Model/Timeline.swift

@@ -11,6 +11,7 @@ import Foundation
 public enum Timeline {
     case home
     case `public`(local: Bool)
+    case instance(instanceURL: URL)
     case tag(hashtag: String)
     case list(id: String)
     case direct
@@ -21,7 +22,7 @@ extension Timeline {
         switch self {
         case .home:
             return "/api/v1/timelines/home"
-        case .public:
+        case .public, .instance(_):
             return "/api/v1/timelines/public"
         case let .tag(hashtag):
             return "/api/v1/timelines/tag/\(hashtag)"
@@ -33,7 +34,12 @@ extension Timeline {
     }
     
     func request(range: RequestRange) -> Request<[Status]> {
-        var request = Request<[Status]>(method: .get, path: endpoint)
+        var request: Request<[Status]>
+        if case let .instance(instanceURL) = self {
+            request = Request<[Status]>(method: .get, baseURL: instanceURL, path: endpoint)
+        } else {
+            request = Request<[Status]>(method: .get, path: endpoint)
+        }
         if case .public(true) = self {
             request.queryParameters.append("local" => true)
         }
@@ -51,6 +57,8 @@ extension Timeline: Codable {
             self = .home
         case "public":
             self = .public(local: try container.decode(Bool.self, forKey: .local))
+        case "instanceURL":
+            self = .instance(instanceURL: try container.decode(URL.self, forKey: .instanceURL))
         case "tag":
             self = .tag(hashtag: try container.decode(String.self, forKey: .hashtag))
         case "list":
@@ -70,6 +78,9 @@ extension Timeline: Codable {
         case let .public(local):
             try container.encode("public", forKey: .type)
             try container.encode(local, forKey: .local)
+        case let .instance(instanceURL):
+            try container.encode("instanceURL", forKey: .type)
+            try container.encode(instanceURL, forKey: .instanceURL)
         case let .tag(hashtag):
             try container.encode("tag", forKey: .type)
             try container.encode(hashtag, forKey: .hashtag)
@@ -84,6 +95,7 @@ extension Timeline: Codable {
     enum CodingKeys: String, CodingKey {
         case type
         case local
+        case instanceURL
         case hashtag
         case listID
     }

Pachyderm/Request/Request.swift

@@ -10,12 +10,14 @@ import Foundation
 
 public struct Request<ResultType: Decodable> {
     let method: Method
+    let baseURL: URL?
     let path: String
     let body: Body
     var queryParameters: [Parameter]
     
-    init(method: Method, path: String, body: Body = .empty, queryParameters: [Parameter] = []) {
+    init(method: Method, baseURL: URL? = nil, path: String, body: Body = .empty, queryParameters: [Parameter] = []) {
         self.method = method
+        self.baseURL = baseURL
         self.path = path
         self.body = body
         self.queryParameters = queryParameters

Tusker.xcodeproj/project.pbxproj

@@ -167,6 +167,9 @@
 		D6945C2F23AC47C3005C403C /* SavedHashtagsManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */; };
 		D6945C3223AC4D36005C403C /* HashtagTimelineViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */; };
 		D6945C3423AC6431005C403C /* AddSavedHashtagViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */; };
+		D6945C3623AC6C09005C403C /* SavedInstancesManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3523AC6C09005C403C /* SavedInstancesManager.swift */; };
+		D6945C3823AC739F005C403C /* InstanceTimelineViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3723AC739F005C403C /* InstanceTimelineViewController.swift */; };
+		D6945C3A23AC75E2005C403C /* FindInstanceViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3923AC75E2005C403C /* FindInstanceViewController.swift */; };
 		D6A3BC7723218E1300FD64D5 /* TimelineSegment.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7323218C6E00FD64D5 /* TimelineSegment.swift */; };
 		D6A3BC7923218E9200FD64D5 /* NotificationGroup.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7823218E9200FD64D5 /* NotificationGroup.swift */; };
 		D6A3BC7C232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3BC7A232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift */; };
@@ -441,6 +444,9 @@
 		D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedHashtagsManager.swift; sourceTree = "<group>"; };
 		D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HashtagTimelineViewController.swift; sourceTree = "<group>"; };
 		D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddSavedHashtagViewController.swift; sourceTree = "<group>"; };
+		D6945C3523AC6C09005C403C /* SavedInstancesManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedInstancesManager.swift; sourceTree = "<group>"; };
+		D6945C3723AC739F005C403C /* InstanceTimelineViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InstanceTimelineViewController.swift; sourceTree = "<group>"; };
+		D6945C3923AC75E2005C403C /* FindInstanceViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = FindInstanceViewController.swift; path = Tusker/Screens/FindInstanceViewController.swift; sourceTree = SOURCE_ROOT; };
 		D6A3BC7323218C6E00FD64D5 /* TimelineSegment.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineSegment.swift; sourceTree = "<group>"; };
 		D6A3BC7823218E9200FD64D5 /* NotificationGroup.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationGroup.swift; sourceTree = "<group>"; };
 		D6A3BC7A232195C600FD64D5 /* ActionNotificationGroupTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ActionNotificationGroupTableViewCell.swift; sourceTree = "<group>"; };
@@ -738,6 +744,7 @@
 			children = (
 				D627943D23A564D400D38C68 /* ExploreViewController.swift */,
 				D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */,
+				D6945C3923AC75E2005C403C /* FindInstanceViewController.swift */,
 			);
 			path = Explore;
 			sourceTree = "<group>";
@@ -788,7 +795,6 @@
 				D641C782213DD7F0004B4513 /* Main */,
 				D641C783213DD7FE004B4513 /* Onboarding */,
 				D641C781213DD7DD004B4513 /* Timeline */,
-				D6945C3023AC4D21005C403C /* Hashtag Timeline */,
 				D641C784213DD819004B4513 /* Profile */,
 				D641C785213DD83B004B4513 /* Conversation */,
 				D641C786213DD852004B4513 /* Notifications */,
@@ -812,6 +818,8 @@
 			children = (
 				D6BC9DD6232D7811002CA326 /* TimelinesPageViewController.swift */,
 				D6F953EB212519E700CF0F2B /* TimelineTableViewController.swift */,
+				D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */,
+				D6945C3723AC739F005C403C /* InstanceTimelineViewController.swift */,
 			);
 			path = Timeline;
 			sourceTree = "<group>";
@@ -1065,14 +1073,6 @@
 			path = de.lproj;
 			sourceTree = "<group>";
 		};
-		D6945C3023AC4D21005C403C /* Hashtag Timeline */ = {
-			isa = PBXGroup;
-			children = (
-				D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */,
-			);
-			path = "Hashtag Timeline";
-			sourceTree = "<group>";
-		};
 		D6A3BC7223218C6E00FD64D5 /* Utilities */ = {
 			isa = PBXGroup;
 			children = (
@@ -1226,6 +1226,7 @@
 				D64D0AAC2128D88B005A6F37 /* LocalData.swift */,
 				D627FF75217E923E00CC0648 /* DraftsManager.swift */,
 				D6945C2E23AC47C3005C403C /* SavedHashtagsManager.swift */,
+				D6945C3523AC6C09005C403C /* SavedInstancesManager.swift */,
 				D6028B9A2150811100F223B9 /* MastodonCache.swift */,
 				D6C693EE216192C2007D6A6D /* TuskerNavigationDelegate.swift */,
 				D6F1F84E2193B9BE00F5FE67 /* Caching */,
@@ -1653,6 +1654,7 @@
 				D68FEC4F232C5BC300C84F23 /* SegmentedPageViewController.swift in Sources */,
 				0450531F22B0097E00100BA2 /* Timline+UI.swift in Sources */,
 				D667E5F52135BCD50057A976 /* ConversationTableViewController.swift in Sources */,
+				D6945C3623AC6C09005C403C /* SavedInstancesManager.swift in Sources */,
 				D6C7D27D22B6EBF800071952 /* AttachmentsContainerView.swift in Sources */,
 				D6F953F021251A2900CF0F2B /* MastodonController.swift in Sources */,
 				0411610022B442870030A9B7 /* AttachmentViewController.swift in Sources */,
@@ -1666,6 +1668,7 @@
 				D6028B9B2150811100F223B9 /* MastodonCache.swift in Sources */,
 				D6A3BC802321B7E600FD64D5 /* FollowNotificationGroupTableViewCell.swift in Sources */,
 				D627944D23A9A03D00D38C68 /* ListTimelineViewController.swift in Sources */,
+				D6945C3823AC739F005C403C /* InstanceTimelineViewController.swift in Sources */,
 				D62D2422217AA7E1005076CC /* UserActivityManager.swift in Sources */,
 				D60D2B8223844C71001B87A3 /* BaseStatusTableViewCell.swift in Sources */,
 				D62D2424217ABF3F005076CC /* NSUserActivity+Extensions.swift in Sources */,
@@ -1691,6 +1694,7 @@
 				D6DD353F22F502EC00A9563A /* Preferences+Notification.swift in Sources */,
 				D63661C02381C144004B9E16 /* PreferencesNavigationController.swift in Sources */,
 				D627944A23A6AD6100D38C68 /* BookmarksTableViewController.swift in Sources */,
+				D6945C3A23AC75E2005C403C /* FindInstanceViewController.swift in Sources */,
 				D6AEBB4523216AF800E5038B /* FollowAccountActivity.swift in Sources */,
 				D6538945214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift in Sources */,
 				D6E0DC8E216EDF1E00369478 /* Previewing.swift in Sources */,

Tusker/Extensions/Timline+UI.swift

@@ -16,6 +16,8 @@ extension Timeline {
             return "Home"
         case let .public(local):
             return local ? "Local" : "Federated"
+        case let .instance(instance):
+            return instance.host!
         case let .tag(hashtag):
             return "#\(hashtag)"
         case .list:
@@ -35,6 +37,8 @@ extension Timeline {
             } else {
                 return UIImage(systemName: "globe")
             }
+        case .instance(_):
+            return UIImage(systemName: "globe")
         default:
             return nil
         }

Tusker/SavedHashtagsManager.swift

@@ -16,7 +16,7 @@ class SavedHashtagsManager: Codable {
     private static var archiveURL = SavedHashtagsManager.documentsDirectory.appendingPathComponent("saved_hashtags").appendingPathExtension("plist")
     
     static func save() {
-        DispatchQueue.global(qos: .userInitiated).async {
+        DispatchQueue.global(qos: .utility).async {
             let encoder = PropertyListEncoder()
             let data = try? encoder.encode(shared)
             try? data?.write(to: archiveURL, options: .noFileProtection)
@@ -36,7 +36,7 @@ class SavedHashtagsManager: Codable {
     
     private var savedHashtags: [Hashtag] = []
     var sorted: [Hashtag] {
-        return savedHashtags.sorted(by: { $0.name > $1.name })
+        return savedHashtags.sorted(by: { $0.name < $1.name })
     }
     
     func isSaved(_ hashtag: Hashtag) -> Bool {

Tusker/SavedInstancesManager.swift

@@ -0,0 +1,61 @@
+//
+//  SavedInstancesManager.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+
+class SavedInstanceManager: Codable {
+    private(set) static var shared: SavedInstanceManager = load()
+    
+    private static var documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
+    private static var archiveURL = SavedInstanceManager.documentsDirectory.appendingPathComponent("saved_instances").appendingPathExtension("plist")
+    
+    static func save() {
+        DispatchQueue.global(qos: .utility).async {
+            let encoder = PropertyListEncoder()
+            let data = try? encoder.encode(shared)
+            try? data?.write(to: archiveURL, options: .noFileProtection)
+        }
+    }
+    
+    static func load() -> SavedInstanceManager {
+        let decoder = PropertyListDecoder()
+        if let data = try? Data(contentsOf: archiveURL),
+            let savedInstanceManager = try? decoder.decode(Self.self, from: data) {
+            return savedInstanceManager
+        }
+        return SavedInstanceManager()
+    }
+    
+    private init() {}
+    
+    private(set) var savedInstances: [URL] = []
+    
+    func isSaved(_ url: URL) -> Bool {
+        return savedInstances.contains(url)
+    }
+    
+    func add(_ url: URL) {
+        if isSaved(url) {
+            return
+        }
+        savedInstances.append(url)
+        SavedInstanceManager.save()
+        NotificationCenter.default.post(name: .savedInstancesChanged, object: nil)
+    }
+    
+    func remove(_ url: URL) {
+        guard isSaved(url) else { return }
+        savedInstances.removeAll(where: { $0 == url })
+        SavedInstanceManager.save()
+        NotificationCenter.default.post(name: .savedInstancesChanged, object: nil)
+    }
+}
+
+extension Notification.Name {
+    static let savedInstancesChanged = Notification.Name("savedInstancesChanged")
+}

Tusker/Screens/Explore/ExploreViewController.swift

@@ -61,6 +61,16 @@ class ExploreViewController: EnhancedTableViewController {
                 cell.imageView!.image = UIImage(systemName: "plus")
                 cell.textLabel!.text = NSLocalizedString("Save Hashtag...", comment: "save hashtag nav item title")
                 cell.accessoryType = .none
+                
+            case let .savedInstance(url):
+                cell.imageView!.image = UIImage(systemName: "globe")
+                cell.textLabel!.text = url.host!
+                cell.accessoryType = .disclosureIndicator
+                
+            case .findInstance:
+                cell.imageView!.image = UIImage(systemName: "magnifyingglass")
+                cell.textLabel!.text = NSLocalizedString("Find An Instance...", comment: "find instance nav item title")
+                cell.accessoryType = .none
             }
             
             return cell
@@ -68,10 +78,11 @@ class ExploreViewController: EnhancedTableViewController {
         dataSource.exploreController = self
         
         var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
-        snapshot.appendSections([.bookmarks, .lists, .savedHashtags])
+        snapshot.appendSections([.bookmarks, .lists, .savedHashtags, .savedInstances])
         snapshot.appendItems([.bookmarks], toSection: .bookmarks)
         snapshot.appendItems([.addList], toSection: .lists)
         snapshot.appendItems(SavedHashtagsManager.shared.sorted.map { .savedHashtag($0) } + [.addSavedHashtag], toSection: .savedHashtags)
+        snapshot.appendItems(SavedInstanceManager.shared.savedInstances.map { .savedInstance($0) } + [.findInstance], toSection: .savedInstances)
         // the initial, static items should not be displayed with an animation
         UIView.performWithoutAnimation {
             dataSource.apply(snapshot)
@@ -89,6 +100,7 @@ class ExploreViewController: EnhancedTableViewController {
         navigationItem.hidesSearchBarWhenScrolling = false
         
         NotificationCenter.default.addObserver(self, selector: #selector(savedHashtagsChanged), name: .savedHashtagsChanged, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(savedInstancesChanged), name: .savedInstancesChanged, object: nil)
         
         reloadLists()
     }
@@ -117,6 +129,13 @@ class ExploreViewController: EnhancedTableViewController {
         dataSource.apply(snapshot)
     }
     
+    @objc func savedInstancesChanged() {
+        var snapshot = dataSource.snapshot()
+        snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .savedInstances))
+        snapshot.appendItems(SavedInstanceManager.shared.savedInstances.map { .savedInstance($0) } + [.findInstance], toSection: .savedInstances)
+        dataSource.apply(snapshot)
+    }
+    
     func deleteList(_ list: List) {
         let title = String(format: NSLocalizedString("Are you sure want to delete the '%@' list?", comment: "delete list alert title"), list.title)
         let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
@@ -143,6 +162,10 @@ class ExploreViewController: EnhancedTableViewController {
         SavedHashtagsManager.shared.remove(hashtag)
     }
     
+    func removeSavedInstance(_ instanceURL: URL) {
+        SavedInstanceManager.shared.remove(instanceURL)
+    }
+    
     // MARK: - Table view delegate
     
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
@@ -188,6 +211,16 @@ class ExploreViewController: EnhancedTableViewController {
             tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
             let navController = UINavigationController(rootViewController: AddSavedHashtagViewController())
             present(navController, animated: true)
+            
+        case let .savedInstance(url):
+            show(InstanceTimelineViewController(for: url), sender: nil)
+            
+        case .findInstance:
+            tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
+            let findController = FindInstanceViewController()
+            findController.instanceTimelineDelegate = self
+            let navController = UINavigationController(rootViewController: findController)
+            present(navController, animated: true)
         }
     }
 
@@ -202,6 +235,7 @@ extension ExploreViewController {
         case bookmarks
         case lists
         case savedHashtags
+        case savedInstances
     }
     enum Item: Hashable {
         case bookmarks
@@ -209,6 +243,8 @@ extension ExploreViewController {
         case addList
         case savedHashtag(Hashtag)
         case addSavedHashtag
+        case savedInstance(URL)
+        case findInstance
 
         static func == (lhs: ExploreViewController.Item, rhs: ExploreViewController.Item) -> Bool {
             switch (lhs, rhs) {
@@ -222,6 +258,10 @@ extension ExploreViewController {
                 return a == b
             case (.addSavedHashtag, .addSavedHashtag):
                 return true
+            case let (.savedInstance(a), .savedInstance(b)):
+                return a == b
+            case (.findInstance, .findInstance):
+                return true
             default:
                 return false
             }
@@ -240,6 +280,11 @@ extension ExploreViewController {
                 hasher.combine(hashtag.name)
             case .addSavedHashtag:
                 hasher.combine("addSavedHashtag")
+            case let .savedInstance(url):
+                hasher.combine("savedInstance")
+                hasher.combine(url)
+            case .findInstance:
+                hasher.combine("findInstance")
             }
         }
     }
@@ -254,6 +299,8 @@ extension ExploreViewController {
                 return NSLocalizedString("Lists", comment: "explore lists section title")
             case 2:
                 return NSLocalizedString("Saved Hashtags", comment: "explore saved hashtags section title")
+            case 3:
+                return NSLocalizedString("Instance Timelines", comment: "explore instance timelines section title")
             default:
                 return nil
             }
@@ -265,6 +312,8 @@ extension ExploreViewController {
                 return true
             case .savedHashtag(_):
                 return true
+            case .savedInstance(_):
+                return true
             default:
                 return false
             }
@@ -281,6 +330,8 @@ extension ExploreViewController {
                 exploreController.deleteList(list)
             case let .savedHashtag(hashtag):
                 exploreController.removeSavedHashtag(hashtag)
+            case let .savedInstance(url):
+                exploreController.removeSavedInstance(url)
             default:
                 return
             }
@@ -289,3 +340,15 @@ extension ExploreViewController {
         
     }
 }
+
+extension ExploreViewController: InstanceTimelineViewControllerDelegate {
+    func didSaveInstance(url: URL) {
+        dismiss(animated: true) {
+            self.show(InstanceTimelineViewController(for: url), sender: nil)
+        }
+    }
+    
+    func didUnsaveInstance(url: URL) {
+        dismiss(animated: true)
+    }
+}

Tusker/Screens/FindInstanceViewController.swift

@@ -0,0 +1,39 @@
+//
+//  FindInstanceViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+class FindInstanceViewController: InstanceSelectorTableViewController {
+
+    var instanceTimelineDelegate: InstanceTimelineViewControllerDelegate?
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        delegate = self
+
+        searchController.hidesNavigationBarDuringPresentation = false
+        
+        navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelButtonPressed))
+    }
+
+    // MARK: - Interaction
+    
+    @objc func cancelButtonPressed() {
+        dismiss(animated: true)
+    }
+
+}
+
+extension FindInstanceViewController: InstanceSelectorTableViewControllerDelegate {
+    func didSelectInstance(url: URL) {
+        let instanceTimelineController = InstanceTimelineViewController(for: url)
+        instanceTimelineController.delegate = instanceTimelineDelegate
+        show(instanceTimelineController, sender: self)
+    }
+}

Tusker/Screens/Timeline/InstanceTimelineViewController.swift

@@ -0,0 +1,71 @@
+//
+//  InstanceTimelineViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 12/19/19.
+//  Copyright © 2019 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+protocol InstanceTimelineViewControllerDelegate {
+    func didSaveInstance(url: URL)
+    func didUnsaveInstance(url: URL)
+}
+
+class InstanceTimelineViewController: TimelineTableViewController {
+    
+    var delegate: InstanceTimelineViewControllerDelegate?
+
+    let instanceURL: URL
+    
+    var toggleSaveButton: UIBarButtonItem!
+    var toggleSaveButtonTitle: String {
+        if SavedInstanceManager.shared.isSaved(instanceURL) {
+            return NSLocalizedString("Unsave", comment: "unsave instance button")
+        } else {
+            return NSLocalizedString("Save", comment: "save instance button")
+        }
+    }
+    
+    init(for url: URL) {
+        self.instanceURL = url
+        
+        super.init(for: .instance(instanceURL: url))
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        toggleSaveButton = UIBarButtonItem(title: toggleSaveButtonTitle, style: .plain, target: self, action: #selector(toggleSaveButtonPressed))
+        navigationItem.rightBarButtonItem = toggleSaveButton
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(savedInstancesChanged), name: .savedInstancesChanged, object: nil)
+    }
+    
+    @objc func savedInstancesChanged() {
+        toggleSaveButton.title = toggleSaveButtonTitle
+    }
+    
+    // MARK: - Table view delegate
+    
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        // no-op, we don't currently support viewing whole conversations from other instances
+    }
+    
+    // MARK: - Interaction
+    @objc func toggleSaveButtonPressed() {
+        if SavedInstanceManager.shared.isSaved(instanceURL) {
+            SavedInstanceManager.shared.remove(instanceURL)
+            delegate?.didUnsaveInstance(url: instanceURL)
+        } else {
+            SavedInstanceManager.shared.add(instanceURL)
+            delegate?.didSaveInstance(url: instanceURL)
+        }
+    }
+
+}

Tusker/Shortcuts/UserActivityManager.swift

@@ -100,6 +100,9 @@ class UserActivityManager {
         case .public(local: false):
             activity.title = NSLocalizedString("Show Federated Timeline", comment: "federated timeline shortcut title")
             activity.suggestedInvocationPhrase = NSLocalizedString("Show my federated timeline", comment: "federated timeline invocation phrase")
+        case let .instance(instance):
+            activity.title = String(format: NSLocalizedString("Show %@", comment: "show instance timeline shortcut title"), instance.host!)
+            activity.suggestedInvocationPhrase = String(format: NSLocalizedString("Show the instance %@", comment: "instance timeline shortcut invocation phrase"), instance.host!)
         case let .tag(hashtag):
             activity.title = String(format: NSLocalizedString("Show #%@", comment: "show hashtag shortcut title"), hashtag)
             activity.suggestedInvocationPhrase = String(format: NSLocalizedString("Show the %@ hashtag", comment: "hashtag shortcut invocation phrase"), hashtag)