Make tab bar controller as a root controller (#354)

* Make tab bar controller application root view controller

* Hides tab bar on push

ExamEGERussian/Resources/Assets/Assets.xcassets/Tab bar/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ExamEGERussian/Resources/Assets/Assets.xcassets/Tab bar/learning-tab-bar.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "learning-tab-bar-selected.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "learning-tab-bar-selected@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "learning-tab-bar-selected@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ExamEGERussian/Resources/Assets/Assets.xcassets/Tab bar/training-tab-bar.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "training-tab-bar-selected.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "training-tab-bar-selected@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "training-tab-bar-selected@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ExamEGERussian/Sources/ApplicationLayer/Assembly/ApplicationAssemblyImpl.swift

@@ -14,18 +14,68 @@ final class ApplicationAssemblyImpl: BaseAssembly, ApplicationAssembly {
             return savedModule
         }
 
-        let navigationController = UINavigationController()
-        let controller = assemblyFactory.topicsAssembly.module(navigationController: navigationController)
-        navigationController.setViewControllers([controller], animated: false)
+        let tabBarController = UITabBarController()
+        // Hides dark shadow on navigation bar during transition.
+        tabBarController.view.backgroundColor = .white
+
+        let learningNavigationController = makeLearningController()
+        let trainingNavigationController = makeTrainingController()
+
+        tabBarController.setViewControllers(
+            [learningNavigationController, trainingNavigationController],
+            animated: false
+        )
+        tabBarController.selectedIndex = 0
 
         let router = AppRouter(
-            assemblyFactory: assemblyFactory,
-            navigationController: navigationController
+            tabBarController: tabBarController,
+            navigationController: learningNavigationController,
+            assemblyFactory: assemblyFactory
         )
         let applicationModule = ApplicationModule(router: router)
 
         ApplicationModuleHolder.instance.applicationModule = applicationModule
 
         return applicationModule
     }
+
+    private func makeLearningController() -> UINavigationController {
+        let navigationController = UINavigationController()
+        guard let controller = assemblyFactory.topicsAssembly.module(
+            navigationController: navigationController
+        ) as? TopicsTableViewController else {
+            fatalError("TopicsTableViewController expected")
+        }
+
+        controller.title = NSLocalizedString("LearningTabTitle", comment: "")
+        controller.tabBarItem = UITabBarItem(
+            title: controller.title,
+            image: UIImage(named: "learning-tab-bar"),
+            tag: 0
+        )
+        controller.presenter.selectSegment(at: 0)
+        navigationController.setViewControllers([controller], animated: false)
+
+        return navigationController
+    }
+
+    private func makeTrainingController() -> UINavigationController {
+        let navigationController = UINavigationController()
+        guard let controller = assemblyFactory.topicsAssembly.module(
+            navigationController: navigationController
+        ) as? TopicsTableViewController else {
+            fatalError("TopicsTableViewController expected")
+        }
+
+        controller.title = NSLocalizedString("TrainingTabTitle", comment: "")
+        controller.tabBarItem = UITabBarItem(
+            title: controller.title,
+            image: UIImage(named: "training-tab-bar"),
+            tag: 1
+        )
+        controller.presenter.selectSegment(at: 1)
+        navigationController.setViewControllers([controller], animated: false)
+
+        return navigationController
+    }
 }

ExamEGERussian/Sources/ApplicationLayer/Router/AppRouter.swift

@@ -10,10 +10,23 @@ import UIKit
 
 final class AppRouter: BaseRouter {
     private(set) weak var window: UIWindow?
+    private(set) weak var tabBarController: UITabBarController?
+
+    override var navigationController: UINavigationController? {
+        return tabBarController?.selectedViewController as? UINavigationController
+    }
+
+    init(tabBarController: UITabBarController,
+         navigationController: UINavigationController,
+         assemblyFactory: AssemblyFactory
+    ) {
+        self.tabBarController = tabBarController
+        super.init(assemblyFactory: assemblyFactory, navigationController: navigationController)
+    }
 
     func start(_ window: UIWindow) {
         self.window = window
-        window.rootViewController = navigationController
+        window.rootViewController = tabBarController
         window.makeKeyAndVisible()
     }
 

ExamEGERussian/Sources/Common/Router/BaseRouter.swift

@@ -14,7 +14,7 @@ class BaseRouter: RouterNavigational {
     typealias DeriveViewControllerClosure = (UINavigationController) -> UIViewController
 
     let assemblyFactory: AssemblyFactory
-    weak var navigationController: UINavigationController?
+    private(set) weak var navigationController: UINavigationController?
 
     // MARK: Init
 

ExamEGERussian/Sources/PresentationLayer/Lessons/Assembly/LessonsAssemblyImpl.swift

@@ -27,6 +27,7 @@ final class LessonsAssemblyImpl: BaseAssembly, LessonsAssembly {
         )
         controller.presenter = presenter
         controller.title = knowledgeGraph[topicId]?.key.title
+        controller.hidesBottomBarWhenPushed = true
 
         return controller
     }

ExamEGERussian/Sources/PresentationLayer/Steps/Adaptive/Assembly/AdaptiveStepsAssembly.swift

@@ -31,6 +31,7 @@ final class AdaptiveStepsAssembly: BaseAssembly, AdaptiveStepsAssemblyProtocol {
             viewsService: serviceFactory.viewsService
         )
         controller.presenter = presenter
+        controller.hidesBottomBarWhenPushed = true
 
         return controller
     }

ExamEGERussian/Sources/PresentationLayer/Steps/Standart/Assembly/StandartStepsAssembly.swift

@@ -27,6 +27,7 @@ final class StandartStepsAssembly: BaseAssembly, StandartStepsAssemblyProtocol {
             stepsService: serviceFactory.stepsService
         )
         controller.presenter = presenter
+        controller.hidesBottomBarWhenPushed = true
         dataSource.stepPresenterDelegate = presenter
 
         return controller

ExamEGERussian/Sources/PresentationLayer/Topics/View/TopicsTableViewController/TopicsTableViewController.swift

@@ -68,29 +68,12 @@ final class TopicsTableViewController: UITableViewController {
 
     private func setupView() {
         tableView.registerNib(for: TopicTableViewCell.self)
-        title = NSLocalizedString("Topics", comment: "")
 
         if #available(iOS 10.0, *) {
             tableView.refreshControl = topicsRefreshControl
         } else {
             tableView.addSubview(topicsRefreshControl)
         }
-
-        navigationItem.leftBarButtonItem = UIBarButtonItem(
-            title: NSLocalizedString("Logout", comment: ""),
-            style: .plain,
-            target: self,
-            action: #selector(onLogoutClick(_:))
-        )
-
-        navigationItem.rightBarButtonItem = UIBarButtonItem(
-            title: NSLocalizedString("SignIn", comment: ""),
-            style: .plain,
-            target: self,
-            action: #selector(onSignInClick(_:))
-        )
-
-        navigationItem.titleView = segmentedControl
     }
 }
 

Stepic/en.lproj/Localizable.strings

@@ -568,3 +568,6 @@ PersonalDeadlineWidgetSuggestionText = "Constant learning is a key to success. W
 "EmptyAuthViewTitle" = "It's You!";
 "EmptyAuthViewSubtitle" = "Complete auth to study with comfort";
 "EmptyAuthViewDescription" = "Authorized account allows you to sync progress";
+
+"LearningTabTitle" = "Learning";
+"TrainingTabTitle" = "Training";

Stepic/ru.lproj/Localizable.strings

@@ -569,3 +569,6 @@ PersonalDeadlineWidgetSuggestionText = "Постоянное обучение -
 "EmptyAuthViewTitle" = "Это Вы!";
 "EmptyAuthViewSubtitle" = "Пройдите авторизацию для более удобного обучения";
 "EmptyAuthViewDescription" = "Авторизованный аккаунт позволит синхронизировать прогресс с другими устройствами";
+
+"LearningTabTitle" = "Обучение";
+"TrainingTabTitle" = "Тренировка";