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120 lines
4.1 KiB
Swift
Executable file
120 lines
4.1 KiB
Swift
Executable file
/*
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Copyright 2018 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import UIKit
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/// `NavigationRouter` is a concrete implementation of NavigationRouterType.
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final class NavigationRouter: NSObject, NavigationRouterType {
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// MARK: - Properties
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// MARK: Private
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private var completions: [UIViewController : () -> Void]
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// MARK: Public
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private let navigationController: UINavigationController
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// MARK: - Setup
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init(navigationController: UINavigationController = UINavigationController()) {
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self.navigationController = navigationController
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self.completions = [:]
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super.init()
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self.navigationController.delegate = self
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}
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// MARK: - Public
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func present(_ module: Presentable, animated: Bool = true) {
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navigationController.present(module.toPresentable(), animated: animated, completion: nil)
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}
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func dismissModule(animated: Bool = true, completion: (() -> Void)? = nil) {
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navigationController.dismiss(animated: animated, completion: completion)
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}
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func setRootModule(_ module: Presentable, hideNavigationBar: Bool = false) {
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// Call all completions so all coordinators can be deallocated
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completions.forEach { $0.value() }
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navigationController.setViewControllers([module.toPresentable()], animated: false)
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navigationController.isNavigationBarHidden = hideNavigationBar
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}
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func popToRootModule(animated: Bool) {
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if let controllers = navigationController.popToRootViewController(animated: animated) {
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controllers.forEach { runCompletion(for: $0) }
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}
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}
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func popToModule(_ module: Presentable, animated: Bool) {
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if let controllers = navigationController.popToViewController(module.toPresentable(), animated: animated) {
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controllers.forEach { runCompletion(for: $0) }
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}
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}
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func push(_ module: Presentable, animated: Bool = true, popCompletion: (() -> Void)? = nil) {
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let controller = module.toPresentable()
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// Avoid pushing UINavigationController onto stack
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guard controller is UINavigationController == false else {
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return
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}
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if let completion = popCompletion {
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completions[controller] = completion
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}
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navigationController.pushViewController(controller, animated: animated)
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}
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func popModule(animated: Bool = true) {
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if let controller = navigationController.popViewController(animated: animated) {
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runCompletion(for: controller)
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}
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}
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// MARK: Presentable
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func toPresentable() -> UIViewController {
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return navigationController
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}
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// MARK: - Private
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private func runCompletion(for controller: UIViewController) {
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guard let completion = completions[controller] else { return }
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completion()
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completions.removeValue(forKey: controller)
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}
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}
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// MARK: - UINavigationControllerDelegate
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extension NavigationRouter: UINavigationControllerDelegate {
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func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
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// Ensure the view controller is popping
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guard let poppedViewController = navigationController.transitionCoordinator?.viewController(forKey: .from),
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!navigationController.viewControllers.contains(poppedViewController) else {
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return
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}
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runCompletion(for: poppedViewController)
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}
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}
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