Add logging in to additional accounts and switching accounts via Preferences

See #16

Tusker/LocalData.swift

@@ -7,8 +7,9 @@
 //
 
 import Foundation
+import Combine
 
-class LocalData {
+class LocalData: ObservableObject {
     
     static let shared = LocalData()
     
@@ -52,6 +53,7 @@ class LocalData {
             }
         }
         set {
+            objectWillChange.send()
             let array = newValue.map { (info) in
                 return [
                     "instanceURL": info.instanceURL.absoluteString,
@@ -71,6 +73,7 @@ class LocalData {
             return defaults.string(forKey: mostRecentAccountKey)
         }
         set {
+            objectWillChange.send()
             defaults.set(newValue, forKey: mostRecentAccountKey)
         }
     }

Tusker/SceneDelegate.swift

@@ -13,8 +13,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
     
     var window: UIWindow?
 
-//    let mastodonController = MastodonController.shared
-    
     func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
         // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
         // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
@@ -111,6 +109,12 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         DraftsManager.save()
     }
     
+    func activateAccount(_ account: LocalData.UserAccountInfo) {
+        LocalData.shared.mostRecentAccount = account.accessToken
+        window!.windowScene!.session.mastodonController = MastodonController.getForAccount(account)
+        showAppUI()
+    }
+    
     func showAppUI() {
         let mastodonController = window!.windowScene!.session.mastodonController!
         mastodonController.getOwnAccount()
@@ -138,8 +142,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
 extension SceneDelegate: OnboardingViewControllerDelegate {
     func didFinishOnboarding(account: LocalData.UserAccountInfo) {
-        LocalData.shared.mostRecentAccount = account.accessToken
+        activateAccount(account)
-        window!.windowScene!.session.mastodonController = MastodonController.getForAccount(account)
-        showAppUI()
     }
 }

Tusker/Screens/Preferences/PreferencesNavigationController.swift

@@ -12,7 +12,7 @@ import SwiftUI
 class PreferencesNavigationController: UINavigationController {
 
     init(mastodonController: MastodonController) {
-        let view = PreferencesView(currentAccount: mastodonController.accountInfo!)
+        let view = PreferencesView()
         let hostingController = UIHostingController(rootView: view)
         super.init(rootViewController: hostingController)
         hostingController.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(donePressed))
@@ -22,6 +22,13 @@ class PreferencesNavigationController: UINavigationController {
         fatalError("init(coder:) has not been implemented")
     }
     
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(showAddAccount), name: .addAccount, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(activateAccount(_:)), name: .activateAccount, object: nil)
+    }
+
     override func viewWillDisappear(_ animated: Bool) {
         super.viewWillDisappear(animated)
         
@@ -33,4 +40,34 @@ class PreferencesNavigationController: UINavigationController {
         dismiss(animated: true)
     }
     
+    @objc func showAddAccount() {
+        let onboardingController = OnboardingViewController()
+        onboardingController.onboardingDelegate = self
+        onboardingController.instanceSelector.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelAddAccount))
+        show(onboardingController, sender: self)
+    }
+    
+    @objc func cancelAddAccount() {
+        dismiss(animated: true)
+    }
+    
+    @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) {
+            sceneDelegate.activateAccount(account)
+        }
+    }
+
+}
+
+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
+    }
 }

Tusker/Screens/Preferences/PreferencesView.swift

@@ -8,7 +8,7 @@
 import SwiftUI
 
 struct PreferencesView: View {
-    var currentAccount: LocalData.UserAccountInfo
+    @ObservedObject var localData = LocalData.shared
     @State private var showingLogoutConfirmation = false
     
     var body: some View {
@@ -16,14 +16,37 @@ struct PreferencesView : View {
 //        NavigationView {
             List {
                 Section {
+                    ForEach(localData.accounts, id: \.accessToken) { (account) in
+                        Button(action: {
+                            NotificationCenter.default.post(name: .activateAccount, object: nil, userInfo: ["account": account])
+                        }) {
+                            HStack {
+                                Text(account.username)
+                                    .foregroundColor(.primary)
+                                Spacer()
+                                if account.accessToken == self.localData.mostRecentAccount {
+                                    Image(systemName: "checkmark")
+                                        .renderingMode(.template)
+                                        .foregroundColor(.secondary)
+                                }
+                            }
+                        }
+                    }
+                    Button(action: {
+                        NotificationCenter.default.post(name: .addAccount, object: nil)
+                    }) {
+                        Text("Add Account...")
+                    }
+                    if localData.mostRecentAccount != nil {
                         Button(action: {
                             self.showingLogoutConfirmation = true
                         }) {
-                        Text("Logout")
+                            Text("Logout from current")
                         }.alert(isPresented: $showingLogoutConfirmation) {
                             Alert(title: Text("Are you sure you want to logout?"), message: nil, primaryButton: .destructive(Text("Logout"), action: self.logoutPressed), secondaryButton: .cancel())
                         }
                     }
+                }
                 
                 Section {
                     NavigationLink(destination: AppearancePrefsView()) {
@@ -50,7 +73,8 @@ struct PreferencesView : View {
     }
     
     func logoutPressed() {
-        LocalData.shared.removeAccount(currentAccount)
+//        LocalData.shared.removeAccount(currentAccount)
+        localData.removeAccount(localData.getMostRecentAccount()!)
         NotificationCenter.default.post(name: .userLoggedOut, object: nil)
     }
 }
@@ -58,8 +82,7 @@ struct PreferencesView : View {
 #if DEBUG
 struct PreferencesView_Previews : PreviewProvider {
     static var previews: some View {
-        let account = LocalData.UserAccountInfo(instanceURL: URL(string: "https://mastodon.social")!, clientID: "clientID", clientSecret: "clientSecret", username: "example", accessToken: "accessToken")
+        return PreferencesView()
-        return PreferencesView(currentAccount: account)
     }
 }
 #endif

Tusker/Screens/Profile/ProfileTableViewController.swift

@@ -128,7 +128,7 @@ class ProfileTableViewController: EnhancedTableViewController {
     }
     
     @objc func updateUIForPreferences() {
-        guard let account = mastodonController.cache.account(for: accountID) else { fatalError("Missing cached account \(accountID!)") }
+        guard let accountID = accountID, let account = mastodonController.cache.account(for: accountID) else { return }
         navigationItem.title = account.realDisplayName
     }