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submodules/TelegramUI/Sources/AuthorizationSequenceSplashController.swift

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+import Foundation
+import UIKit
+import Display
+import AsyncDisplayKit
+import Postbox
+import TelegramCore
+import SyncCore
+import SwiftSignalKit
+import TelegramPresentationData
+import LegacyComponents
+
+import RMIntro
+
+final class AuthorizationSequenceSplashController: ViewController {
+    private var controllerNode: AuthorizationSequenceSplashControllerNode {
+        return self.displayNode as! AuthorizationSequenceSplashControllerNode
+    }
+    
+    private let accountManager: AccountManager
+    private let postbox: Postbox
+    private let network: Network
+    private let theme: PresentationTheme
+    
+    private let controller: RMIntroViewController
+    
+    private var validLayout: ContainerViewLayout?
+    
+    var nextPressed: ((PresentationStrings?) -> Void)?
+    
+    private let suggestedLocalization = Promise<SuggestedLocalizationInfo?>()
+    private let activateLocalizationDisposable = MetaDisposable()
+    
+    init(accountManager: AccountManager, postbox: Postbox, network: Network, theme: PresentationTheme) {
+        self.accountManager = accountManager
+        self.postbox = postbox
+        self.network = network
+        self.theme = theme
+        
+        self.suggestedLocalization.set(.single(nil)
+        |> then(currentlySuggestedLocalization(network: network, extractKeys: ["Login.ContinueWithLocalization"])))
+        let suggestedLocalization = self.suggestedLocalization
+        
+        let localizationSignal = SSignal(generator: { subscriber in
+            let disposable = suggestedLocalization.get().start(next: { localization in
+                guard let localization = localization else {
+                    return
+                }
+                
+                var continueWithLanguageString: String = "Continue"
+                for entry in localization.extractedEntries {
+                    switch entry {
+                        case let .string(key, value):
+                            if key == "Login.ContinueWithLocalization" {
+                                continueWithLanguageString = value
+                            }
+                        default:
+                            break
+                    }
+                }
+                
+                if let available = localization.availableLocalizations.first, available.languageCode != "en" {
+                    let value = TGSuggestedLocalization(info: TGAvailableLocalization(title: available.title, localizedTitle: available.localizedTitle, code: available.languageCode), continueWithLanguageString: continueWithLanguageString, chooseLanguageString: "Choose Language", chooseLanguageOtherString: "Choose Language", englishLanguageNameString: "English")
+                    subscriber?.putNext(value)
+                }
+            }, completed: {
+                subscriber?.putCompletion()
+            })
+            
+            return SBlockDisposable(block: {
+                disposable.dispose()
+            })
+        })
+        
+        self.controller = RMIntroViewController(backgroundColor: theme.list.plainBackgroundColor, primaryColor: theme.list.itemPrimaryTextColor, buttonColor: theme.intro.startButtonColor, accentColor: theme.list.itemAccentColor, regularDotColor: theme.intro.dotColor, highlightedDotColor: theme.list.itemPrimaryTextColor, suggestedLocalizationSignal: localizationSignal)
+        
+        super.init(navigationBarPresentationData: nil)
+        
+        self.supportedOrientations = ViewControllerSupportedOrientations(regularSize: .all, compactSize: .portrait)
+        
+        self.statusBar.statusBarStyle = theme.intro.statusBarStyle.style
+        
+        self.controller.startMessaging = { [weak self] in
+            self?.activateLocalization("en")
+        }
+        self.controller.startMessagingInAlternativeLanguage = { [weak self] code in
+            if let code = code {
+                self?.activateLocalization(code)
+            }
+        }
+    }
+    
+    required init(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    deinit {
+        self.activateLocalizationDisposable.dispose()
+    }
+    
+    override public func loadDisplayNode() {
+        self.displayNode = AuthorizationSequenceSplashControllerNode(theme: self.theme)
+        self.displayNodeDidLoad()
+    }
+    
+    private func addControllerIfNeeded() {
+        if !controller.isViewLoaded || controller.view.superview == nil {
+            self.displayNode.view.addSubview(controller.view)
+            if let layout = self.validLayout {
+                controller.view.frame = CGRect(origin: CGPoint(), size: layout.size)
+            }
+            controller.viewDidAppear(false)
+        }
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        self.addControllerIfNeeded()
+        controller.viewWillAppear(false)
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+        
+        controller.viewDidAppear(animated)
+    }
+    
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        
+        controller.viewWillDisappear(animated)
+    }
+    
+    override func viewDidDisappear(_ animated: Bool) {
+        super.viewDidDisappear(animated)
+        
+        controller.viewDidDisappear(animated)
+    }
+    
+    override func containerLayoutUpdated(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition) {
+        super.containerLayoutUpdated(layout, transition: transition)
+        
+        self.validLayout = layout
+        let controllerFrame = CGRect(origin: CGPoint(), size: layout.size)
+        self.controller.defaultFrame = controllerFrame
+        
+        self.controllerNode.containerLayoutUpdated(layout, navigationBarHeight: 0.0, transition: transition)
+        
+        self.addControllerIfNeeded()
+        if case .immediate = transition {
+            self.controller.view.frame = controllerFrame
+        } else {
+            UIView.animate(withDuration: 0.3, animations: {
+                self.controller.view.frame = controllerFrame
+            })
+        }
+    }
+    
+    private func activateLocalization(_ code: String) {
+        let currentCode = self.accountManager.transaction { transaction -> String in
+            if let current = transaction.getSharedData(SharedDataKeys.localizationSettings) as? LocalizationSettings {
+                return current.primaryComponent.languageCode
+            } else {
+                return "en"
+            }
+        }
+        let suggestedCode = self.suggestedLocalization.get()
+        |> map { localization -> String? in
+            return localization?.availableLocalizations.first?.languageCode
+        }
+        
+        let _ = (combineLatest(currentCode, suggestedCode)
+        |> take(1)
+        |> deliverOnMainQueue).start(next: { [weak self] currentCode, suggestedCode in
+            guard let strongSelf = self else {
+                return
+            }
+            
+            if let suggestedCode = suggestedCode {
+                _ = markSuggestedLocalizationAsSeenInteractively(postbox: strongSelf.postbox, languageCode: suggestedCode).start()
+            }
+            
+            if currentCode == code {
+                strongSelf.pressNext(strings: nil)
+                return
+            }
+            
+            strongSelf.controller.isEnabled = false
+            let accountManager = strongSelf.accountManager
+            let postbox = strongSelf.postbox
+            
+            strongSelf.activateLocalizationDisposable.set(downloadAndApplyLocalization(accountManager: accountManager, postbox: postbox, network: strongSelf.network, languageCode: code).start(completed: {
+                let _ = (accountManager.transaction { transaction -> PresentationStrings? in
+                    let localizationSettings: LocalizationSettings?
+                    if let current = transaction.getSharedData(SharedDataKeys.localizationSettings) as? LocalizationSettings {
+                        localizationSettings = current
+                    } else {
+                        localizationSettings = nil
+                    }
+                    let stringsValue: PresentationStrings
+                    if let localizationSettings = localizationSettings {
+                        stringsValue = PresentationStrings(primaryComponent: PresentationStringsComponent(languageCode: localizationSettings.primaryComponent.languageCode, localizedName: localizationSettings.primaryComponent.localizedName, pluralizationRulesCode: localizationSettings.primaryComponent.customPluralizationCode, dict: dictFromLocalization(localizationSettings.primaryComponent.localization)), secondaryComponent: localizationSettings.secondaryComponent.flatMap({ PresentationStringsComponent(languageCode: $0.languageCode, localizedName: $0.localizedName, pluralizationRulesCode: $0.customPluralizationCode, dict: dictFromLocalization($0.localization)) }), groupingSeparator: "")
+                    } else {
+                        stringsValue = defaultPresentationStrings
+                    }
+                    return stringsValue
+                }
+                |> deliverOnMainQueue).start(next: { strings in
+                    self?.controller.isEnabled = true
+                    self?.pressNext(strings: strings)
+                })
+            }))
+        })
+    }
+    
+    private func pressNext(strings: PresentationStrings?) {
+        if let navigationController = self.navigationController, navigationController.viewControllers.last === self {
+            self.nextPressed?(strings)
+        }
+    }
+}