Add CrossSigningSetupCoordinator that handles cross signing setup navigation flow.

Riot/Modules/CrossSigning/Setup/CrossSigningSetupCoordinator.swift

@@ -0,0 +1,107 @@
+// File created from FlowTemplate
+// $ createRootCoordinator.sh CrossSigning CrossSigningSetup
+/*
+ Copyright 2021 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import UIKit
+
+@objcMembers
+final class CrossSigningSetupCoordinator: CrossSigningSetupCoordinatorType {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    private let parameters: CrossSigningSetupCoordinatorParameters
+    private let crossSigningService: CrossSigningService
+    
+    // MARK: Public
+
+    // Must be used only internally
+    var childCoordinators: [Coordinator] = []
+    
+    weak var delegate: CrossSigningSetupCoordinatorDelegate?
+    
+    // MARK: - Setup
+    
+    init(parameters: CrossSigningSetupCoordinatorParameters) {
+        self.parameters = parameters
+        self.crossSigningService = CrossSigningService()
+    }    
+    
+    // MARK: - Public methods
+    
+    func start() {
+        self.showReauthentication()
+    }
+    
+    func toPresentable() -> UIViewController {
+        return self.parameters.presenter.toPresentable()
+    }
+    
+    // MARK: - Private methods
+
+    private func showReauthentication() {
+        
+        let authenticationSessionParameters = self.crossSigningService.setupCrossSigningAuthenticationSessionParameters()
+        
+        let reauthenticationParameters = ReauthenticationCoordinatorParameters(session: parameters.session,
+                                                                               presenter: parameters.presenter,
+                                                                               title: parameters.title,
+                                                                               message: parameters.message,
+                                                                               authenticationSessionParameters: authenticationSessionParameters)
+        
+        let coordinator = ReauthenticationCoordinator(parameters: reauthenticationParameters)
+        coordinator.delegate = self
+        self.add(childCoordinator: coordinator)
+        
+        coordinator.start()
+    }
+    
+    private func setupCrossSigning(with authenticationParameters: [String: Any]) {
+        guard let crossSigning = self.parameters.session.crypto.crossSigning else {
+            return
+        }
+        
+        crossSigning.setup(withAuthParams: authenticationParameters) { [weak self] in
+            guard let self = self else {
+                return
+            }
+            self.delegate?.crossSigningSetupCoordinatorDidComplete(self)
+        } failure: { [weak self] error in
+            guard let self = self else {
+                return
+            }
+            self.delegate?.crossSigningSetupCoordinator(self, didFailWithError: error)
+        }
+    }
+}
+
+// MARK: - ReauthenticationCoordinatorDelegate
+extension CrossSigningSetupCoordinator: ReauthenticationCoordinatorDelegate {
+        
+    func reauthenticationCoordinatorDidComplete(_ coordinator: ReauthenticationCoordinatorType, withAuthenticationParameters authenticationParameters: [String: Any]?) {
+        self.setupCrossSigning(with: authenticationParameters ?? [:])
+    }
+    
+    func reauthenticationCoordinatorDidCancel(_ coordinator: ReauthenticationCoordinatorType) {
+        self.delegate?.crossSigningSetupCoordinatorDidCancel(self)
+    }
+    
+    func reauthenticationCoordinator(_ coordinator: ReauthenticationCoordinatorType, didFailWithError error: Error) {
+        self.delegate?.crossSigningSetupCoordinator(self, didFailWithError: error)
+    }
+}