ios: allow to delete the last profile (#3707)

* ios: allow to delete the last profile

* less changes

* no flash of empty view

---------

Co-authored-by: Avently <avently@local>

apps/ios/Shared/Model/ChatModel.swift

@@ -139,7 +139,7 @@ final class ChatModel: ObservableObject {
     }
 
     func removeUser(_ user: User) {
-        if let i = getUserIndex(user), users[i].user.userId != currentUser?.userId {
+        if let i = getUserIndex(user) {
             users.remove(at: i)
         }
     }

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -1339,8 +1339,12 @@ private func changeActiveUser_(_ userId: Int64, viewPwd: String?) throws {
     try getUserChatData()
 }
 
-func changeActiveUserAsync_(_ userId: Int64, viewPwd: String?) async throws {
+func changeActiveUserAsync_(_ userId: Int64?, viewPwd: String?) async throws {
-    let currentUser = try await apiSetActiveUserAsync(userId, viewPwd: viewPwd)
+    let currentUser = if let userId = userId {
+        try await apiSetActiveUserAsync(userId, viewPwd: viewPwd)
+    } else {
+        try apiGetActiveUser()
+    }
     let users = try await listUsersAsync()
     await MainActor.run {
         let m = ChatModel.shared
@@ -1349,7 +1353,7 @@ func changeActiveUserAsync_(_ userId: Int64, viewPwd: String?) async throws {
     }
     try await getUserChatDataAsync()
     await MainActor.run {
-        if var (_, invitation) = ChatModel.shared.callInvitations.first(where: { _, inv in inv.user.userId == userId }) {
+        if let currentUser = currentUser, var (_, invitation) = ChatModel.shared.callInvitations.first(where: { _, inv in inv.user.userId == userId }) {
             invitation.user = currentUser
             activateCall(invitation)
         }
@@ -1365,15 +1369,22 @@ func getUserChatData() throws {
 }
 
 private func getUserChatDataAsync() async throws {
+    let m = ChatModel.shared
+    if m.currentUser != nil {
         let userAddress = try await apiGetUserAddressAsync()
         let chatItemTTL = try await getChatItemTTLAsync()
         let chats = try await apiGetChatsAsync()
         await MainActor.run {
-        let m = ChatModel.shared
             m.userAddress = userAddress
             m.chatItemTTL = chatItemTTL
             m.chats = chats.map { Chat.init($0) }
         }
+    } else {
+        await MainActor.run {
+            m.userAddress = nil
+            m.chats = []
+        }
+    }
 }
 
 class ChatReceiver {

apps/ios/Shared/Views/UserSettings/SettingsView.swift

@@ -159,10 +159,11 @@ struct SettingsView: View {
     }
 
     @ViewBuilder func settingsView() -> some View {
-        let user: User = chatModel.currentUser!
+        let user = chatModel.currentUser
         NavigationView {
             List {
                 Section("You") {
+                    if let user = user {
                         NavigationLink {
                             UserProfile()
                                 .navigationTitle("Your current profile")
@@ -170,15 +171,18 @@ struct SettingsView: View {
                             ProfilePreview(profileOf: user)
                                 .padding(.leading, -8)
                         }
+                    }
 
                     NavigationLink {
-                        UserProfilesView()
+                        UserProfilesView(showSettings: $showSettings)
                     } label: {
                         settingsRow("person.crop.rectangle.stack") { Text("Your chat profiles") }
                     }
 
+
+                    if let user = user {
                         NavigationLink {
-                        UserAddressView(shareViaProfile: chatModel.currentUser!.addressShared)
+                            UserAddressView(shareViaProfile: user.addressShared)
                                 .navigationTitle("SimpleX address")
                                 .navigationBarTitleDisplayMode(.large)
                         } label: {
@@ -191,6 +195,7 @@ struct SettingsView: View {
                         } label: {
                             settingsRow("switch.2") { Text("Chat preferences") }
                         }
+                    }
 
                     NavigationLink {
                         ConnectDesktopView(viaSettings: true)
@@ -250,6 +255,7 @@ struct SettingsView: View {
                 }
 
                 Section("Help") {
+                    if let user = user {
                         NavigationLink {
                             ChatHelp(showSettings: $showSettings)
                                 .navigationTitle("Welcome \(user.displayName)!")
@@ -257,6 +263,7 @@ struct SettingsView: View {
                         } label: {
                             settingsRow("questionmark") { Text("How to use it") }
                         }
+                    }
                     NavigationLink {
                         WhatsNewView(viaSettings: true)
                             .navigationBarTitleDisplayMode(.inline)

apps/ios/Shared/Views/UserSettings/UserProfilesView.swift

@@ -8,6 +8,7 @@ import SimpleXChat
 
 struct UserProfilesView: View {
     @EnvironmentObject private var m: ChatModel
+    @Binding var showSettings: Bool
     @Environment(\.editMode) private var editMode
     @AppStorage(DEFAULT_SHOW_HIDDEN_PROFILES_NOTICE) private var showHiddenProfilesNotice = true
     @AppStorage(DEFAULT_SHOW_MUTE_PROFILE_ALERT) private var showMuteProfileAlert = true
@@ -25,7 +26,6 @@ struct UserProfilesView: View {
 
     private enum UserProfilesAlert: Identifiable {
         case deleteUser(user: User, delSMPQueues: Bool)
-        case cantDeleteLastUser
         case hiddenProfilesNotice
         case muteProfileAlert
         case activateUserError(error: String)
@@ -34,7 +34,6 @@ struct UserProfilesView: View {
         var id: String {
             switch self {
             case let .deleteUser(user, delSMPQueues): return "deleteUser \(user.userId) \(delSMPQueues)"
-            case .cantDeleteLastUser: return "cantDeleteLastUser"
             case .hiddenProfilesNotice: return "hiddenProfilesNotice"
             case .muteProfileAlert: return "muteProfileAlert"
             case let .activateUserError(err): return "activateUserError \(err)"
@@ -78,7 +77,7 @@ struct UserProfilesView: View {
             Section {
                 let users = filteredUsers()
                 let v = ForEach(users) { u in
-                    userView(u.user, allowDelete: users.count > 1)
+                    userView(u.user)
                 }
                 if #available(iOS 16, *) {
                     v.onDelete { indexSet in
@@ -146,13 +145,6 @@ struct UserProfilesView: View {
                     },
                     secondaryButton: .cancel()
                 )
-            case .cantDeleteLastUser:
-                return Alert(
-                    title: Text("Can't delete user profile!"),
-                    message: m.users.count > 1
-                            ? Text("There should be at least one visible user profile.")
-                            : Text("There should be at least one user profile.")
-                )
             case .hiddenProfilesNotice:
                 return Alert(
                     title: Text("Make profile private!"),
@@ -280,11 +272,21 @@ struct UserProfilesView: View {
                 if let newActive = m.users.first(where: { u in !u.user.activeUser && !u.user.hidden }) {
                     try await changeActiveUserAsync_(newActive.user.userId, viewPwd: nil)
                     try await deleteUser()
+                } else {
+                    // Deleting the last visible user while having hidden one(s)
+                    try await deleteUser()
+                    try await changeActiveUserAsync_(nil, viewPwd: nil)
+                    await MainActor.run {
+                        onboardingStageDefault.set(.step1_SimpleXInfo)
+                        m.onboardingStage = .step1_SimpleXInfo
+                        showSettings = false
+                    }
                 }
             } else {
                 try await deleteUser()
             }
         } catch let error {
+            logger.error("Error deleting user profile: \(error)")
             let a = getErrorAlert(error, "Error deleting user profile")
             alert = .error(title: a.title, error: a.message)
         }
@@ -295,7 +297,7 @@ struct UserProfilesView: View {
         }
     }
 
-    @ViewBuilder private func userView(_ user: User, allowDelete: Bool) -> some View {
+    @ViewBuilder private func userView(_ user: User) -> some View {
         let v = Button {
             Task {
                 do {
@@ -323,9 +325,7 @@ struct UserProfilesView: View {
                 }
             }
         }
-        .disabled(user.activeUser)
         .foregroundColor(.primary)
-        .deleteDisabled(!allowDelete)
         .swipeActions(edge: .leading, allowsFullSwipe: true) {
             if user.hidden {
                 Button("Unhide") {
@@ -361,8 +361,6 @@ struct UserProfilesView: View {
         }
         if #available(iOS 16, *) {
             v
-        } else if !allowDelete {
-            v
         } else {
             v.swipeActions(edge: .trailing, allowsFullSwipe: true) {
                 Button("Delete", role: .destructive) {
@@ -373,12 +371,8 @@ struct UserProfilesView: View {
     }
 
     private func confirmDeleteUser(_ user: User) {
-        if m.users.count > 1 && (user.hidden || visibleUsersCount > 1) {
         showDeleteConfirmation = true
         userToDelete = user
-        } else {
-            alert = .cantDeleteLastUser
-        }
     }
 
     private func setUserPrivacy(_ user: User, successAlert: UserProfilesAlert? = nil, _ api: @escaping () async throws -> User) {
@@ -409,6 +403,6 @@ public func chatPasswordHash(_ pwd: String, _ salt: String) -> String {
 
 struct UserProfilesView_Previews: PreviewProvider {
     static var previews: some View {
-        UserProfilesView()
+        UserProfilesView(showSettings: Binding.constant(true))
     }
 }