Revisited Navigator

Threaded/Components/TabsView.swift

@@ -3,7 +3,7 @@
 import SwiftUI
 
 struct TabsView: View {
-    @Binding var selectedTab: TabDestination
+    @State var selectedTab: TabDestination = Navigator.shared.selectedTab
 
     var postButton: () -> Void = {}
     var tapAction: () -> Void = {}
@@ -92,6 +92,9 @@ struct TabsView: View {
         }
         .padding(.horizontal, 30)
         .background(Color.appBackground)
+        .onChange(of: selectedTab) { _, newValue in
+            Navigator.shared.selectedTab = newValue
+        }
     }
 }
 

Threaded/Data/Navigator.swift

@@ -5,10 +5,33 @@ import SwiftUI
 
 @Observable
 public class Navigator: ObservableObject {
+    public static var shared: Navigator = Navigator()
+
     public var path: [RouterDestination] = []
     public var presentedSheet: SheetDestination?
     public var presentedCover: SheetDestination?
-    public var selectedTab: TabDestination = .timeline
+    public var selectedTab: TabDestination {
+        set {
+            change(to: newValue)
+        }
+        get {
+            return self.currentTab
+        }
+    }
+    private var currentTab: TabDestination = .timeline
+
+    public private(set) var memorizedNav: [TabDestination : [RouterDestination]] = [:]
+    public var showTabbar: Bool {
+        get {
+            self.visiTabbar
+        }
+        set {
+            withAnimation(.spring) {
+                self.visiTabbar = newValue
+            }
+        }
+    }
+    private var visiTabbar: Bool = true
 
     public var client: Client?
     
@@ -16,6 +39,33 @@ public class Navigator: ObservableObject {
         path.append(to)
     }
 
+    /// Changes the current tab from the current ``Navigator`` class
+    func change(to tab: TabDestination) {
+        savePath()
+
+        withAnimation(.spring) {
+            loadPath(from: tab)
+        }
+    }
+
+    private func savePath() {
+        let lastTab: TabDestination = self.currentTab
+        let lastPath: [RouterDestination] = self.path
+
+        memorizedNav.updateValue(lastPath, forKey: lastTab)
+    }
+
+    private func loadPath(from tab: TabDestination) {
+        if let (newTab, newPath) = memorizedNav.first(where: { $0.key == tab }).map({ [$0.key : $0.value] })?.first {
+            self.currentTab = newTab
+            self.path = newPath
+        } else {
+            print("Couldn't find Navigator data from \(tab.id), created new ones")
+            self.currentTab = tab
+            self.path = []
+        }
+    }
+
     public func handle(url: URL) -> OpenURLAction.Result {
         guard let client = self.client else { return .systemAction }
         let path: String = url.absoluteString.replacingOccurrences(of: AppInfo.scheme, with: "") // remove all path
@@ -65,14 +115,15 @@ public class Navigator: ObservableObject {
         return OpenURLAction.Result.handled
     }
 
+    /// This only applies on the current path, not the saved ones in ``memorizedNav``
     public func removeSettingsOfPath() {
         self.path = self.path.filter({ !RouterDestination.allSettings.contains($0) })
     }
 }
 
+/// This can be used for universal ``SheetDestination``s
 public class UniversalNavigator: Navigator {
-    static var shared: UniversalNavigator = UniversalNavigator()
-    public var tabNavigator: Navigator?
+    public static var `static`: UniversalNavigator = UniversalNavigator()
 }
 
 public enum TabDestination: Identifiable {

Threaded/Views/AccountView.swift

@@ -5,7 +5,7 @@ import SwiftUI
 struct AccountView: View {
     @Environment(AccountManager.self) private var accountManager: AccountManager
     
-    @State private var navigator: Navigator = Navigator()
+    @State private var navigator: Navigator = Navigator.shared
     @State public var account: Account
     
     var body: some View {

Threaded/Views/ContentView.swift

@@ -8,12 +8,13 @@ struct ContentView: View {
     
     private var huggingFace: HuggingFace = HuggingFace()
     @State private var preferences: UserPreferences = .defaultPreferences
-    @StateObject private var uniNavigator = UniversalNavigator.shared
+    @State private var navigator: Navigator = .shared
+    @StateObject private var uniNavigator = UniversalNavigator.static
     @StateObject private var accountManager: AccountManager = AccountManager.shared
     
     var body: some View {
         ZStack {
-            TabView(selection: $uniNavigator.selectedTab, content: {
+            TabView(selection: $navigator.selectedTab, content: {
                 if accountManager.getAccount() != nil {
                     TimelineView(timelineModel: FetchTimeline(client: accountManager.forceClient()))
                         .background(Color.appBackground)
@@ -40,8 +41,10 @@ struct ContentView: View {
         }
         .frame(maxWidth: appDelegate.windowWidth)
         .overlay(alignment: .bottom) {
-            TabsView(selectedTab: $uniNavigator.selectedTab, postButton: {
+            TabsView(postButton: {
                     uniNavigator.presentedSheet = .post(content: "", replyId: nil, editId: nil)
+            }, retapAction: {
+                Navigator.shared.path = []
             })
             .safeAreaPadding(.vertical, 10)
             .zIndex(10)

Threaded/Views/DiscoveryView.swift

@@ -5,7 +5,7 @@ import SwiftUI
 struct DiscoveryView: View {
     @Environment(AccountManager.self) private var accountManager: AccountManager
     
-    @State private var navigator: Navigator = Navigator()
+    @State private var navigator: Navigator = Navigator.shared
 
     @State private var searchQuery: String = ""
     @State private var results: [String : SearchResults] = [:]

Threaded/Views/NotificationsView.swift

@@ -6,7 +6,7 @@ import TipKit
 struct NotificationsView: View {
     @Environment(AccountManager.self) private var accountManager
     
-    @State private var navigator: Navigator = Navigator()
+    @State private var navigator: Navigator = Navigator.shared
     @State private var notifications: [GroupedNotification] = []
     @State private var loadingNotifs: Bool = true
     @State private var lastId: Int? = nil

Threaded/Views/TimelineView.swift

@@ -5,7 +5,7 @@ import SwiftData
 
 struct TimelineView: View {
     @Environment(AccountManager.self) private var accountManager: AccountManager
-    @State var navigator: Navigator = Navigator()
+    @State var navigator: Navigator = Navigator.shared
     
     @State private var showPicker: Bool = false
     @State private var timelines: [TimelineFilter] = [.home, .trending, .local, .federated]