Wait for auth context to become ready, display progress

submodules/TelegramUI/TelegramUI/AppDelegate.swift

@@ -1046,15 +1046,16 @@ final class SharedApplicationContext {
             }
             self.authContextValue = context
             if let context = context {
-                let isReady: Signal<Bool, NoError> = .single(true)
+                let presentationData = context.sharedContext.currentPresentationData.with({ $0 })
+                let statusController = OverlayStatusController(theme: presentationData.theme, strings: presentationData.strings, type: .loading(cancelled: nil))
+                self.mainWindow.present(statusController, on: .root)
+                let isReady: Signal<Bool, NoError> = context.isReady.get()
                 authContextReadyDisposable.set((isReady
                 |> filter { $0 }
                 |> take(1)
                 |> deliverOnMainQueue).start(next: { _ in
-                    self.mainWindow.present(context.rootController, on: .root)
+                    statusController.dismiss()
-                    //self.mainWindow.viewController = context.rootController
+                    self.mainWindow.present(context.rootController, on: .root)                }))
-                    //self.mainWindow.topLevelOverlayControllers = context.overlayControllers
-                }))
             } else {
                 authContextReadyDisposable.set(nil)
             }

submodules/TelegramUI/TelegramUI/ApplicationContext.swift

@@ -23,12 +23,15 @@ final class UnauthorizedApplicationContext {
     
     let rootController: AuthorizationSequenceController
     
+    let isReady = Promise<Bool>()
+    
     init(apiId: Int32, apiHash: String, sharedContext: SharedAccountContext, account: UnauthorizedAccount, otherAccountPhoneNumbers: ((String, AccountRecordId, Bool)?, [(String, AccountRecordId, Bool)])) {
         self.sharedContext = sharedContext
         self.account = account
         let presentationData = sharedContext.currentPresentationData.with { $0 }
         
         self.rootController = AuthorizationSequenceController(sharedContext: sharedContext, account: account, otherAccountPhoneNumbers: otherAccountPhoneNumbers, strings: presentationData.strings, theme: presentationData.theme, openUrl: sharedContext.applicationBindings.openUrl, apiId: apiId, apiHash: apiHash)
+        self.isReady.set(self.rootController.ready.get())
         
         account.shouldBeServiceTaskMaster.set(sharedContext.applicationBindings.applicationInForeground |> map { value -> AccountServiceTaskMasterMode in
             if value {

submodules/TelegramUI/TelegramUI/AuthorizationSequenceController.swift

@@ -38,6 +38,12 @@ public final class AuthorizationSequenceController: NavigationController, MFMail
     
     private var didPlayPresentationAnimation = false
     
+    private let _ready = Promise<Bool>()
+    override public var ready: Promise<Bool> {
+        return self._ready
+    }
+    private var didSetReady = false
+    
     public init(sharedContext: SharedAccountContext, account: UnauthorizedAccount, otherAccountPhoneNumbers: ((String, AccountRecordId, Bool)?, [(String, AccountRecordId, Bool)]), strings: PresentationStrings, theme: PresentationTheme, openUrl: @escaping (String) -> Void, apiId: Int32, apiHash: String) {
         self.sharedContext = sharedContext
         self.account = account
@@ -770,6 +776,10 @@ public final class AuthorizationSequenceController: NavigationController, MFMail
         if wasEmpty {
             self.topViewController?.view.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.3)
         }
+        if !self.didSetReady {
+            self.didSetReady = true
+            self._ready.set(.single(true))
+        }
     }
     
     public func applyConfirmationCode(_ code: Int) {