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//
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// RouteComposer
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// NavigationControllerAdapter.swift
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// https://github.com/ekazaev/route-composer
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//
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// Created by Eugene Kazaev in 2018-2022.
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// Distributed under the MIT license.
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//
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// Become a sponsor:
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// https://github.com/sponsors/ekazaev
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//
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import Foundation
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import UIKit
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/// Default `ContainerAdapter` for `UINavigationController`
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public struct NavigationControllerAdapter<VC: UINavigationController>: ConcreteContainerAdapter {
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// MARK: Properties
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weak var navigationController: VC?
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// MARK: Methods
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public init(with navigationController: VC) {
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self.navigationController = navigationController
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}
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public var containedViewControllers: [UIViewController] {
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navigationController?.viewControllers ?? []
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}
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public var visibleViewControllers: [UIViewController] {
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guard let topViewController = navigationController?.topViewController else {
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return []
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}
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return [topViewController]
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}
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public func makeVisible(_ viewController: UIViewController, animated: Bool, completion: @escaping (_: RoutingResult) -> Void) {
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guard let navigationController else {
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completion(.failure(RoutingError.compositionFailed(.init("\(String(describing: VC.self)) has been deallocated"))))
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return
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}
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guard navigationController.topViewController != viewController else {
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completion(.success)
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return
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}
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guard contains(viewController) else {
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completion(.failure(RoutingError.compositionFailed(.init("\(String(describing: navigationController)) does not contain \(String(describing: viewController))"))))
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return
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}
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navigationController.popToViewController(viewController, animated: animated)
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if let transitionCoordinator = navigationController.transitionCoordinator, animated {
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transitionCoordinator.animate(alongsideTransition: nil) { _ in
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if navigationController.isViewLoaded {
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navigationController.view.layoutIfNeeded()
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}
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completion(.success)
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}
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} else {
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if navigationController.isViewLoaded {
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navigationController.view.layoutIfNeeded()
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}
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completion(.success)
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}
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}
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public func setContainedViewControllers(_ containedViewControllers: [UIViewController], animated: Bool, completion: @escaping (_: RoutingResult) -> Void) {
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guard let navigationController else {
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completion(.failure(RoutingError.compositionFailed(.init("\(String(describing: VC.self)) has been deallocated"))))
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return
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}
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navigationController.setViewControllers(containedViewControllers, animated: animated)
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if let transitionCoordinator = navigationController.transitionCoordinator, animated {
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transitionCoordinator.animate(alongsideTransition: nil) { _ in
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completion(.success)
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}
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} else {
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completion(.success)
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}
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}
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}
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