Clean up account switching code

Tusker/LocalData.swift

@@ -21,6 +21,7 @@ class LocalData: ObservableObject {
             if ProcessInfo.processInfo.environment.keys.contains("UI_TESTING_LOGIN") {
                 accounts = [
                     UserAccountInfo(
+                        id: UUID().uuidString,
                         instanceURL: URL(string: "http://localhost:8080")!,
                         clientID: "client_id",
                         clientSecret: "client_secret",
@@ -38,15 +39,16 @@ class LocalData: ObservableObject {
         get {
             if let array = defaults.array(forKey: accountsKey) as? [[String: String]] {
                 return array.compactMap { (info) in
-                    guard let instanceURL = info["instanceURL"],
+                    guard let id = info["id"],
+                        let instanceURL = info["instanceURL"],
                         let url = URL(string: instanceURL),
-                        let id = info["clientID"],
+                        let clientId = info["clientID"],
                         let secret = info["clientSecret"],
                         let username = info["username"],
                         let accessToken = info["accessToken"] else {
                             return nil
                     }
-                    return UserAccountInfo(instanceURL: url, clientID: id, clientSecret: secret, username: username, accessToken: accessToken)
+                    return UserAccountInfo(id: id, instanceURL: url, clientID: clientId, clientSecret: secret, username: username, accessToken: accessToken)
                 }
             } else {
                 return []
@@ -56,6 +58,7 @@ class LocalData: ObservableObject {
             objectWillChange.send()
             let array = newValue.map { (info) in
                 return [
+                    "id": info.id,
                     "instanceURL": info.instanceURL.absoluteString,
                     "clientID": info.clientID,
                     "clientSecret": info.clientSecret,
@@ -68,7 +71,7 @@ class LocalData: ObservableObject {
     }
     
     private let mostRecentAccountKey = "mostRecentAccount"
-    var mostRecentAccount: String? {
+    private var mostRecentAccount: String? {
         get {
             return defaults.string(forKey: mostRecentAccountKey)
         }
@@ -82,41 +85,60 @@ class LocalData: ObservableObject {
         return !accounts.isEmpty
     }
     
-    func addAccount(instanceURL url: URL, clientID id: String, clientSecret secret: String, username: String, accessToken: String) -> UserAccountInfo {
+    func addAccount(instanceURL url: URL, clientID: String, clientSecret secret: String, username: String, accessToken: String) -> UserAccountInfo {
         var accounts = self.accounts
         if let index = accounts.firstIndex(where: { $0.instanceURL == url && $0.username == username }) {
             accounts.remove(at: index)
         }
-        let info = UserAccountInfo(instanceURL: url, clientID: id, clientSecret: secret, username: username, accessToken: accessToken)
+        let id = UUID().uuidString
+        let info = UserAccountInfo(id: id, instanceURL: url, clientID: clientID, clientSecret: secret, username: username, accessToken: accessToken)
         accounts.append(info)
         self.accounts = accounts
         return info
     }
     
     func removeAccount(_ info: UserAccountInfo) {
-        
+        accounts.removeAll(where: { $0.id == info.id })
     }
     
     func getMostRecentAccount() -> UserAccountInfo? {
-        if let accessToken = mostRecentAccount {
+        guard onboardingComplete else { return nil }
-            return accounts.first { $0.accessToken == accessToken }
+        let mostRecent: UserAccountInfo?
+        if let id = mostRecentAccount {
+            mostRecent = accounts.first { $0.id == id }
         } else {
-            return nil
+            mostRecent = nil
         }
+        return mostRecent ?? accounts.first!
+    }
+    
+    func setMostRecentAccount(_ account: UserAccountInfo?) {
+        mostRecentAccount = account?.id
     }
 
 }
 
 extension LocalData {
     struct UserAccountInfo: Equatable, Hashable {
+        let id: String
         let instanceURL: URL
         let clientID: String
         let clientSecret: String
         let username: String
         let accessToken: String
+        
+        func hash(into hasher: inout Hasher) {
+            hasher.combine(id)
+        }
+        
+        static func ==(lhs: UserAccountInfo, rhs: UserAccountInfo) -> Bool {
+            return lhs.id == rhs.id
+        }
     }
 }
 
 extension Notification.Name {
-    static let userLoggedOut = Notification.Name("userLoggedOut")
+    static let userLoggedOut = Notification.Name("Tusker.userLoggedOut")
+    static let addAccount = Notification.Name("Tusker.addAccount")
+    static let activateAccount = Notification.Name("Tusker.activateAccount")
 }

Tusker/SceneDelegate.swift

@@ -34,7 +34,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         
         window!.makeKeyAndVisible()
         
-        NotificationCenter.default.addObserver(self, selector: #selector(onUserLoggedOut), name: .userLoggedOut, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(themePrefChanged), name: .themePreferenceChanged, object: nil)
         themePrefChanged()
         
@@ -110,11 +109,20 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
     }
     
     func activateAccount(_ account: LocalData.UserAccountInfo) {
-        LocalData.shared.mostRecentAccount = account.accessToken
+        LocalData.shared.setMostRecentAccount(account)
         window!.windowScene!.session.mastodonController = MastodonController.getForAccount(account)
         showAppUI()
     }
     
+    func logoutCurrent() {
+        LocalData.shared.removeAccount(LocalData.shared.getMostRecentAccount()!)
+        if LocalData.shared.onboardingComplete {
+            activateAccount(LocalData.shared.accounts.first!)
+        } else {
+            showOnboardingUI()
+        }
+    }
+
     func showAppUI() {
         let mastodonController = window!.windowScene!.session.mastodonController!
         mastodonController.getOwnAccount()
@@ -130,10 +138,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         window!.rootViewController = onboarding
     }
     
-    @objc func onUserLoggedOut() {
-        showOnboardingUI()
-    }
-    
     @objc func themePrefChanged() {
         window?.overrideUserInterfaceStyle = Preferences.shared.theme
     }

Tusker/Screens/Onboarding/OnboardingViewController.swift

@@ -69,9 +69,9 @@ extension OnboardingViewController: InstanceSelectorTableViewControllerDelegate
                 
                 mastodonController.authorize(authorizationCode: authCode) { (accessToken) in
                     mastodonController.getOwnAccount { (account) in
-                        let accountInfo = LocalData.shared.addAccount(instanceURL: instanceURL, clientID: clientID, clientSecret: clientSecret, username: account.username, accessToken: accessToken)
-                        
                         DispatchQueue.main.async {
+                            let accountInfo = LocalData.shared.addAccount(instanceURL: instanceURL, clientID: clientID, clientSecret: clientSecret, username: account.username, accessToken: accessToken)
+                            
                             self.onboardingDelegate?.didFinishOnboarding(account: accountInfo)
                         }
                     }

Tusker/Screens/Preferences/PreferencesNavigationController.swift

@@ -27,6 +27,7 @@ class PreferencesNavigationController: UINavigationController {
         
         NotificationCenter.default.addObserver(self, selector: #selector(showAddAccount), name: .addAccount, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(activateAccount(_:)), name: .activateAccount, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(userLoggedOut), name: .userLoggedOut, object: nil)
     }
 
     override func viewWillDisappear(_ animated: Bool) {
@@ -48,26 +49,35 @@ class PreferencesNavigationController: UINavigationController {
     }
     
     @objc func cancelAddAccount() {
-        dismiss(animated: true)
+        dismiss(animated: true) // dismisses instance selector
     }
     
     @objc func activateAccount(_ notification: Notification) {
         let account = notification.userInfo!["account"] as! LocalData.UserAccountInfo
         let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
-        dismiss(animated: true) {
+        dismiss(animated: true) { // dismiss preferences
             sceneDelegate.activateAccount(account)
         }
     }
+    
+    @objc func userLoggedOut() {
+        let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
+        dismiss(animated: true) { // dismiss preferences
+            sceneDelegate.logoutCurrent()
+        }
+    }
 
 }
 
-extension Notification.Name {
-    static let addAccount = Notification.Name("Tusker.addAccount")
-    static let activateAccount = Notification.Name("Tusker.activateAccount")
-}
-
 extension PreferencesNavigationController: OnboardingViewControllerDelegate {
     func didFinishOnboarding(account: LocalData.UserAccountInfo) {
-        LocalData.shared.mostRecentAccount = account.accessToken
+        DispatchQueue.main.async {
+            let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
+            self.dismiss(animated: true) { // dismiss instance selector
+                self.dismiss(animated: true) { // dismiss preferences
+                    sceneDelegate.activateAccount(account)
+                }
+            }
+        }
     }
 }

Tusker/Screens/Preferences/PreferencesView.swift

@@ -10,7 +10,7 @@ import SwiftUI
 struct PreferencesView: View {
     @ObservedObject var localData = LocalData.shared
     @State private var showingLogoutConfirmation = false
-    
+
     var body: some View {
         // workaround: the navigation view is provided by MyProfileTableViewController so that it can inject the Done button
 //        NavigationView {
@@ -24,7 +24,7 @@ struct PreferencesView: View {
                                 Text(account.username)
                                     .foregroundColor(.primary)
                                 Spacer()
-                                if account.accessToken == self.localData.mostRecentAccount {
+                                if account == self.localData.getMostRecentAccount() {
                                     Image(systemName: "checkmark")
                                         .renderingMode(.template)
                                         .foregroundColor(.secondary)
@@ -37,7 +37,7 @@ struct PreferencesView: View {
                     }) {
                         Text("Add Account...")
                     }
-                    if localData.mostRecentAccount != nil {
+                    if localData.getMostRecentAccount() != nil {
                         Button(action: {
                             self.showingLogoutConfirmation = true
                         }) {
@@ -73,8 +73,6 @@ struct PreferencesView: View {
     }
     
     func logoutPressed() {
-//        LocalData.shared.removeAccount(currentAccount)
-        localData.removeAccount(localData.getMostRecentAccount()!)
         NotificationCenter.default.post(name: .userLoggedOut, object: nil)
     }
 }