#40: Create UserSessionStore and update state machine for session restoration.

This commit is contained in:
Doug
2022-06-14 17:36:28 +01:00
committed by Doug
parent 81df70c66d
commit 701a8a389e
8 changed files with 344 additions and 287 deletions

View File

@@ -151,6 +151,7 @@
90DF83A6A347F7EE7EDE89EE /* AttributedStringBuilderTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = AF25E364AE85090A70AE4644 /* AttributedStringBuilderTests.swift */; };
90EB25D13AE6EEF034BDE9D2 /* Assets.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71D52BAA5BADB06E5E8C295D /* Assets.swift */; };
91D3084B285898A80013EF53 /* OnboardingSplashScreenUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 91D3084A285898A80013EF53 /* OnboardingSplashScreenUITests.swift */; };
91D3084E28589D940013EF53 /* UserSessionStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 91D3084D28589D940013EF53 /* UserSessionStore.swift */; };
93BA4A81B6D893271101F9F0 /* Introspect in Frameworks */ = {isa = PBXBuildFile; productRef = 5986E300FC849DEAB2EE7AEB /* Introspect */; };
964B9D2EC38C488C360CE0C9 /* HomeScreen.swift in Sources */ = {isa = PBXBuildFile; fileRef = B902EA6CD3296B0E10EE432B /* HomeScreen.swift */; };
978BB24F2A5D31EE59EEC249 /* UserSessionProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5F4134FEFE4EB55759017408 /* UserSessionProtocol.swift */; };
@@ -442,6 +443,7 @@
8D8169443E5AC5FF71BFB3DB /* cs */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = cs; path = cs.lproj/Localizable.strings; sourceTree = "<group>"; };
90733775209F4D4D366A268F /* RootRouterType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RootRouterType.swift; sourceTree = "<group>"; };
91D3084A285898A80013EF53 /* OnboardingSplashScreenUITests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OnboardingSplashScreenUITests.swift; sourceTree = "<group>"; };
91D3084D28589D940013EF53 /* UserSessionStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserSessionStore.swift; sourceTree = "<group>"; };
92B61C243325DC76D3086494 /* EventBriefFactoryProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EventBriefFactoryProtocol.swift; sourceTree = "<group>"; };
938BD1FCD9E6FF3FCFA7AB4C /* zh-CN */ = {isa = PBXFileReference; lastKnownFileType = text.plist.stringsdict; name = "zh-CN"; path = "zh-CN.lproj/Localizable.stringsdict"; sourceTree = "<group>"; };
93B21E72926FACB13A186689 /* ml */ = {isa = PBXFileReference; lastKnownFileType = text.plist.stringsdict; name = ml; path = ml.lproj/Localizable.stringsdict; sourceTree = "<group>"; };
@@ -652,13 +654,13 @@
0787F81684E503024BD0C051 /* Services */ = {
isa = PBXGroup;
children = (
AAFDD509929A0CCF8BCE51EB /* Authentication */,
0ED3F5C21537519389C07644 /* BugReport */,
8039515BAA53B7C3275AC64A /* Client */,
79E560F5113ED25D172E550C /* Media */,
40E6246F03D1FE377BC5D963 /* Room */,
82D5AD3EAE3A5C1068A44A88 /* Session */,
FCDF06BDB123505F0334B4F9 /* Timeline */,
91D3084C28589D820013EF53 /* UserSession */,
);
path = Services;
sourceTree = "<group>";
@@ -726,13 +728,6 @@
path = Resources;
sourceTree = "<group>";
};
298F75357B344DE964106404 /* Login */ = {
isa = PBXGroup;
children = (
);
path = Login;
sourceTree = "<group>";
};
304D3532D4FFC1F0ABC0626E /* ViewFrameReader */ = {
isa = PBXGroup;
children = (
@@ -1084,6 +1079,16 @@
path = HTMLParsing;
sourceTree = "<group>";
};
91D3084C28589D820013EF53 /* UserSession */ = {
isa = PBXGroup;
children = (
91D3084D28589D940013EF53 /* UserSessionStore.swift */,
F3BC93D4555571E8B4BC47F9 /* KeychainController.swift */,
956BDA4AE16429AD015661A8 /* KeychainControllerProtocol.swift */,
);
path = UserSession;
sourceTree = "<group>";
};
9413F680ECDFB2B0DDB0DEF2 /* Packages */ = {
isa = PBXGroup;
children = (
@@ -1173,16 +1178,6 @@
path = UnitTests;
sourceTree = "<group>";
};
AAFDD509929A0CCF8BCE51EB /* Authentication */ = {
isa = PBXGroup;
children = (
0AD575D36B9F6D1D543305D1 /* AuthenticationCoordinator.swift */,
F3BC93D4555571E8B4BC47F9 /* KeychainController.swift */,
956BDA4AE16429AD015661A8 /* KeychainControllerProtocol.swift */,
);
path = Authentication;
sourceTree = "<group>";
};
AD5FCF9340D670C526AD17E4 /* UI */ = {
isa = PBXGroup;
children = (
@@ -1309,7 +1304,7 @@
E74CD7681375AD2EAA34D66B /* Authentication */ = {
isa = PBXGroup;
children = (
298F75357B344DE964106404 /* Login */,
0AD575D36B9F6D1D543305D1 /* AuthenticationCoordinator.swift */,
);
path = Authentication;
sourceTree = "<group>";
@@ -1842,6 +1837,7 @@
F01DB7DD607015557CD48B33 /* ViewFrameReader.swift in Sources */,
01F4A40C1EDCEC8DC4EC9CFA /* WeakDictionary.swift in Sources */,
77E192BA943B90F9F310CA23 /* WeakDictionaryKeyReference.swift in Sources */,
91D3084E28589D940013EF53 /* UserSessionStore.swift in Sources */,
50391038BC50C8ED9A4D88A0 /* WeakDictionaryReference.swift in Sources */,
7DE5EB4CB2401C672257283C /* WeakKeyDictionary.swift in Sources */,
);

View File

@@ -7,7 +7,6 @@
//
import UIKit
import Kingfisher
class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
private let window: UIWindow
@@ -19,8 +18,7 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
private let navigationRouter: NavigationRouter
private let keychainController: KeychainControllerProtocol
private let authenticationCoordinator: AuthenticationCoordinator!
private let userSessionStore: UserSessionStore
private var userSession: UserSession!
@@ -61,14 +59,10 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
fatalError("Should have a valid bundle identifier at this point")
}
keychainController = KeychainController(identifier: bundleIdentifier)
authenticationCoordinator = AuthenticationCoordinator(keychainController: keychainController,
navigationRouter: navigationRouter)
userSessionStore = UserSessionStore(bundleIdentifier: bundleIdentifier)
screenshotDetector = ScreenshotDetector()
screenshotDetector.callback = processScreenshotDetection
authenticationCoordinator.delegate = self
setupStateMachine()
@@ -84,7 +78,8 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
}
func start() {
stateMachine.processEvent(.start)
self.window.makeKeyAndVisible()
stateMachine.processEvent(userSessionStore.hasSessions ? .startWithExistingSession : .startWithAuthentication)
}
// MARK: - AuthenticationCoordinatorDelegate
@@ -93,16 +88,14 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
stateMachine.processEvent(.attemptedSignIn)
}
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator, didFailWithError error: AuthenticationCoordinatorError) {
stateMachine.processEvent(.failedSigningIn)
}
func authenticationCoordinatorDidSetupClientProxy(_ authenticationCoordinator: AuthenticationCoordinator) {
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator, didLoginWithSession userSession: UserSession) {
self.userSession = userSession
remove(childCoordinator: authenticationCoordinator)
stateMachine.processEvent(.succeededSigningIn)
}
func authenticationCoordinatorDidTearDownClientProxy(_ authenticationCoordinator: AuthenticationCoordinator) {
stateMachine.processEvent(.succeededSigningOut)
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator, didFailWithError error: AuthenticationCoordinatorError) {
stateMachine.processEvent(.failedSigningIn)
}
// MARK: - Private
@@ -111,27 +104,36 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
private func setupStateMachine() {
stateMachine.addTransitionHandler { [weak self] context in
guard let self = self else { return }
switch (context.fromState, context.event, context.toState) {
case (.initial, .start, .signedOut):
self.window.makeKeyAndVisible()
self.authenticationCoordinator.start()
case (.initial, .startWithAuthentication, .signedOut):
self.showAuthentication()
case (.signedOut, .attemptedSignIn, .signingIn):
self.showLoadingIndicator()
case (.signingIn, .failedSigningIn, .signedOut):
self.hideLoadingIndicator()
self.showLoginErrorToast()
case (.signingIn, .succeededSigningIn, .signedIn):
case (.signingIn, .succeededSigningIn, .homeScreen):
self.hideLoadingIndicator()
self.setupUserSession()
case (.signedIn, .showHomeScreen, .homeScreen):
self.presentHomeScreen()
case (.initial, .startWithExistingSession, .restoringSession):
self.showLoadingIndicator()
self.restoreUserSession()
case (.restoringSession, .failedRestoringSession, .signedOut):
self.hideLoadingIndicator()
self.showLoginErrorToast()
case (.restoringSession, .succeededRestoringSession, .homeScreen):
self.hideLoadingIndicator()
self.presentHomeScreen()
case(_, _, .roomScreen(let roomId)):
self.presentRoomWithIdentifier(roomId)
case(.roomScreen, .dismissedRoomScreen, .homeScreen):
self.tearDownDismissedRoomScreen()
case (_, .attemptSignOut, .signingOut):
self.authenticationCoordinator.logout()
self.userSessionStore.logout(userSession: self.userSession)
self.stateMachine.processEvent(.succeededSigningOut)
case (.signingOut, .succeededSigningOut, .signedOut):
self.tearDownUserSession()
case (.signingOut, .failedSigningOut, _):
@@ -151,15 +153,26 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
}
// swiftlint:enable cyclomatic_complexity
private func setupUserSession() {
guard let clientProxy = authenticationCoordinator.clientProxy else {
fatalError("User session should be setup at this point")
private func restoreUserSession() {
Task {
switch await userSessionStore.restoreUserSession() {
case .success(let userSession):
self.userSession = userSession
stateMachine.processEvent(.succeededRestoringSession)
case .failure:
MXLog.error("Failed to restore an existing session.")
stateMachine.processEvent(.failedRestoringSession)
}
}
}
private func showAuthentication() {
let coordinator = AuthenticationCoordinator(userSessionStore: userSessionStore,
navigationRouter: navigationRouter)
coordinator.delegate = self
userSession = .init(clientProxy: clientProxy,
mediaProvider: MediaProvider(clientProxy: clientProxy, imageCache: ImageCache.default))
stateMachine.processEvent(.showHomeScreen)
add(childCoordinator: coordinator)
coordinator.start()
}
private func tearDownUserSession() {
@@ -170,7 +183,8 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
userSession = nil
mainNavigationController.setViewControllers([splashViewController], animated: false)
authenticationCoordinator.start()
showAuthentication()
}
private func presentHomeScreen() {
@@ -259,7 +273,7 @@ class AppCoordinator: AuthenticationCoordinatorDelegate, Coordinator {
}
private func showLoadingIndicator() {
loadingIndicator = indicatorPresenter.present(.loading(label: "Loading", isInteractionBlocking: true))
loadingIndicator = indicatorPresenter.present(.loading(label: ElementL10n.loading, isInteractionBlocking: true))
}
private func hideLoadingIndicator() {

View File

@@ -18,8 +18,8 @@ class AppCoordinatorStateMachine {
case signedOut
/// Processing sign in request
case signingIn
/// Successfully signed in
case signedIn
/// Opening an existing session.
case restoringSession
/// Showing the home screen
case homeScreen
/// Showing the settings screen
@@ -33,22 +33,29 @@ class AppCoordinatorStateMachine {
/// Events that can be triggered on the AppCoordinator state machine
enum Event: EventType {
/// Start AppCoordinator flows, move from initial
case start
/// Start the `AppCoordinator` by showing authentication.
case startWithAuthentication
/// A sign in request has been started
case attemptedSignIn
/// Signing it succeeded
/// Signing in succeeded
case succeededSigningIn
/// Signing in failed
case failedSigningIn
/// Request home screen presentation
case showHomeScreen
/// Start the `AppCoordinator` by restoring an existing account.
case startWithExistingSession
/// Restoring session succeeded.
case succeededRestoringSession
/// Restoring session failed.
case failedRestoringSession
/// Request sign out
case attemptSignOut
/// Signing out succeeded
case succeededSigningOut
/// Signing out failed
case failedSigningOut
/// Request presentation for a particular room
/// - Parameter roomId:the room identifier
case showRoomScreen(roomId: String)
@@ -64,14 +71,14 @@ class AppCoordinatorStateMachine {
init() {
stateMachine = StateMachine(state: .initial) { machine in
machine.addRoutes(event: .start, transitions: [ .initial => .signedOut ])
machine.addRoutes(event: .startWithAuthentication, transitions: [ .initial => .signedOut ])
machine.addRoutes(event: .attemptedSignIn, transitions: [ .signedOut => .signingIn ])
machine.addRoutes(event: .succeededSigningIn, transitions: [ .signingIn => .signedIn ])
machine.addRoutes(event: .succeededSigningIn, transitions: [ .signingIn => .homeScreen ])
machine.addRoutes(event: .failedSigningIn, transitions: [ .signingIn => .signedOut ])
machine.addRoutes(event: .showHomeScreen, transitions: [ .signedIn => .homeScreen ])
machine.addRoutes(event: .startWithExistingSession, transitions: [ .initial => .restoringSession ])
machine.addRoutes(event: .succeededRestoringSession, transitions: [ .restoringSession => .homeScreen ])
machine.addRoutes(event: .failedRestoringSession, transitions: [ .restoringSession => .signedOut ])
machine.addRoutes(event: .attemptSignOut, transitions: [ .homeScreen => .signingOut ])

View File

@@ -0,0 +1,129 @@
//
// AuthenticationCoordinator.swift
// ElementX
//
// Created by Stefan Ceriu on 11.02.2022.
// Copyright © 2022 Element. All rights reserved.
//
import Foundation
import MatrixRustSDK
enum AuthenticationCoordinatorError: Error {
case failedLoggingIn
}
@MainActor
protocol AuthenticationCoordinatorDelegate: AnyObject {
func authenticationCoordinatorDidStartLoading(_ authenticationCoordinator: AuthenticationCoordinator)
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator,
didLoginWithSession userSession: UserSession)
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator,
didFailWithError error: AuthenticationCoordinatorError)
}
class AuthenticationCoordinator: Coordinator {
private let userSessionStore: UserSessionStore
private let navigationRouter: NavigationRouter
private(set) var clientProxy: ClientProxyProtocol?
var childCoordinators: [Coordinator] = []
weak var delegate: AuthenticationCoordinatorDelegate?
init(userSessionStore: UserSessionStore,
navigationRouter: NavigationRouter) {
self.userSessionStore = userSessionStore
self.navigationRouter = navigationRouter
}
func start() {
showSplashScreen()
}
// MARK: - Private
private func showSplashScreen() {
let coordinator = SplashScreenCoordinator()
coordinator.callback = { [weak self] action in
guard let self = self else { return }
switch action {
case .login:
self.startNewLoginFlow()
case .register:
fatalError("Not implemented")
}
}
add(childCoordinator: coordinator)
navigationRouter.setRootModule(coordinator)
coordinator.start()
}
private func startNewLoginFlow() {
let parameters = LoginScreenCoordinatorParameters()
let coordinator = LoginScreenCoordinator(parameters: parameters)
coordinator.callback = { [weak self, weak coordinator] action in
guard let self = self, let coordinator = coordinator else {
return
}
switch action {
case .login(let result):
Task {
switch await self.login(username: result.username, password: result.password) {
case .success(let userSession):
self.delegate?.authenticationCoordinator(self, didLoginWithSession: userSession)
self.remove(childCoordinator: coordinator)
self.navigationRouter.dismissModule()
case .failure(let error):
self.delegate?.authenticationCoordinator(self, didFailWithError: error)
MXLog.error("Failed logging in user with error: \(error)")
}
}
}
}
add(childCoordinator: coordinator)
navigationRouter.push(coordinator)
coordinator.start()
}
private func login(username: String, password: String) async -> Result<UserSession, AuthenticationCoordinatorError> {
Benchmark.startTrackingForIdentifier("Login", message: "Started new login")
delegate?.authenticationCoordinatorDidStartLoading(self)
let basePath = userSessionStore.baseDirectoryPath(for: username)
let loginTask = Task.detached {
try loginNewClient(basePath: basePath,
username: username,
password: password)
}
switch await loginTask.result {
case .success(let client):
return await userSession(for: client)
case .failure(let error):
MXLog.error("Failed logging in with error: \(error)")
return .failure(.failedLoggingIn)
}
}
private func userSession(for client: Client) async -> Result<UserSession, AuthenticationCoordinatorError> {
switch await userSessionStore.userSession(for: client) {
case .success(let clientProxy):
return .success(clientProxy)
case .failure:
return .failure(.failedLoggingIn)
}
}
}

View File

@@ -1,223 +0,0 @@
//
// AuthenticationCoordinator.swift
// ElementX
//
// Created by Stefan Ceriu on 11.02.2022.
// Copyright © 2022 Element. All rights reserved.
//
import Foundation
import MatrixRustSDK
enum AuthenticationCoordinatorError: Error {
case failedLoggingIn
case failedRestoringLogin
case failedSettingUpSession
}
@MainActor
protocol AuthenticationCoordinatorDelegate: AnyObject {
func authenticationCoordinatorDidStartLoading(_ authenticationCoordinator: AuthenticationCoordinator)
func authenticationCoordinatorDidSetupClientProxy(_ authenticationCoordinator: AuthenticationCoordinator)
func authenticationCoordinatorDidTearDownClientProxy(_ authenticationCoordinator: AuthenticationCoordinator)
func authenticationCoordinator(_ authenticationCoordinator: AuthenticationCoordinator,
didFailWithError error: AuthenticationCoordinatorError)
}
class AuthenticationCoordinator: Coordinator {
private let keychainController: KeychainControllerProtocol
private let navigationRouter: NavigationRouter
private(set) var clientProxy: ClientProxyProtocol?
var childCoordinators: [Coordinator] = []
weak var delegate: AuthenticationCoordinatorDelegate?
init(keychainController: KeychainControllerProtocol,
navigationRouter: NavigationRouter) {
self.keychainController = keychainController
self.navigationRouter = navigationRouter
}
func start() {
let availableAccessTokens = keychainController.accessTokens()
guard let usernameTokenTuple = availableAccessTokens.first else {
showSplashScreen()
return
}
Task {
switch await restorePreviousLogin(usernameTokenTuple) {
case .success:
self.delegate?.authenticationCoordinatorDidSetupClientProxy(self)
case .failure(let error):
self.delegate?.authenticationCoordinator(self, didFailWithError: error)
MXLog.error("Failed restoring login with error: \(error)")
// On any restoration failure reset the token and restart
self.keychainController.removeAllAccessTokens()
self.start()
}
}
}
func logout() {
keychainController.removeAllAccessTokens()
if let userIdentifier = clientProxy?.userIdentifier {
deleteBaseDirectoryForUsername(userIdentifier)
}
clientProxy = nil
delegate?.authenticationCoordinatorDidTearDownClientProxy(self)
}
// MARK: - Private
private func showSplashScreen() {
let coordinator = SplashScreenCoordinator()
coordinator.callback = { [weak self] action in
guard let self = self else { return }
switch action {
case .login:
self.startNewLoginFlow { result in
switch result {
case .success:
self.delegate?.authenticationCoordinatorDidSetupClientProxy(self)
case .failure(let error):
self.delegate?.authenticationCoordinator(self, didFailWithError: error)
MXLog.error("Failed logging in user with error: \(error)")
}
}
case .register:
fatalError("Not implemented")
}
}
add(childCoordinator: coordinator)
navigationRouter.setRootModule(coordinator)
coordinator.start()
}
private func startNewLoginFlow(_ completion: @escaping (Result<(), AuthenticationCoordinatorError>) -> Void) {
let parameters = LoginScreenCoordinatorParameters()
let coordinator = LoginScreenCoordinator(parameters: parameters)
coordinator.callback = { [weak self, weak coordinator] action in
guard let self = self, let coordinator = coordinator else {
return
}
switch action {
case .login(let result):
Task {
switch await self.login(username: result.username, password: result.password) {
case .success:
completion(.success(()))
self.remove(childCoordinator: coordinator)
self.navigationRouter.dismissModule()
case .failure(let error):
completion(.failure(error))
}
}
}
}
add(childCoordinator: coordinator)
navigationRouter.setRootModule(coordinator)
coordinator.start()
}
private func login(username: String, password: String) async -> Result<Void, AuthenticationCoordinatorError> {
Benchmark.startTrackingForIdentifier("Login", message: "Started new login")
delegate?.authenticationCoordinatorDidStartLoading(self)
let basePath = baseDirectoryPathForUsername(username)
let loginTask = Task.detached {
try loginNewClient(basePath: basePath,
username: username,
password: password)
}
switch await loginTask.result {
case .success(let client):
return await setupProxyForClient(client)
case .failure(let error):
MXLog.error("Failed logging in with error: \(error)")
return .failure(.failedLoggingIn)
}
}
private func restorePreviousLogin(_ usernameTokenTuple: (username: String, accessToken: String)) async -> Result<Void, AuthenticationCoordinatorError> {
Benchmark.startTrackingForIdentifier("Login", message: "Started restoring previous login")
delegate?.authenticationCoordinatorDidStartLoading(self)
let basePath = baseDirectoryPathForUsername(usernameTokenTuple.username)
let loginTask = Task.detached {
try loginWithToken(basePath: basePath,
restoreToken: usernameTokenTuple.accessToken)
}
switch await loginTask.result {
case .success(let client):
return await setupProxyForClient(client)
case .failure(let error):
MXLog.error("Failed restoring login with error: \(error)")
return .failure(.failedRestoringLogin)
}
}
private func setupProxyForClient(_ client: Client) async -> Result<Void, AuthenticationCoordinatorError> {
Benchmark.endTrackingForIdentifier("Login", message: "Finished login")
do {
let accessToken = try client.restoreToken()
let userId = try client.userId()
keychainController.setAccessToken(accessToken, forUsername: userId)
} catch {
MXLog.error("Failed setting up user session with error: \(error)")
return .failure(.failedSettingUpSession)
}
clientProxy = ClientProxy(client: client)
return .success(())
}
private func baseDirectoryPathForUsername(_ username: String) -> String {
guard var url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
fatalError("Should always be able to retrieve the caches directory")
}
url = url.appendingPathComponent(username)
try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: false, attributes: nil)
return url.path
}
private func deleteBaseDirectoryForUsername(_ username: String) {
guard var url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
fatalError("Should always be able to retrieve the caches directory")
}
url = url.appendingPathComponent(username)
try? FileManager.default.removeItem(at: url)
}
}

View File

@@ -0,0 +1,134 @@
//
// Copyright 2022 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 Foundation
import MatrixRustSDK
import Kingfisher
enum UserSessionStoreError: Error {
case missingCredentials
case failedRestoringLogin
case failedSettingUpSession
}
@MainActor
class UserSessionStore {
private let keychainController: KeychainControllerProtocol
/// Whether or not there are sessions in the store.
var hasSessions: Bool { !keychainController.accessTokens().isEmpty }
init(bundleIdentifier: String) {
keychainController = KeychainController(identifier: bundleIdentifier)
}
func restoreUserSession() async -> Result<UserSession, UserSessionStoreError> {
let availableAccessTokens = keychainController.accessTokens()
guard let usernameTokenTuple = availableAccessTokens.first else {
return .failure(.missingCredentials)
}
switch await restorePreviousLogin(usernameTokenTuple) {
case .success(let clientProxy):
return .success(UserSession(clientProxy: clientProxy,
mediaProvider: MediaProvider(clientProxy: clientProxy, imageCache: ImageCache.default)))
case .failure(let error):
MXLog.error("Failed restoring login with error: \(error)")
// On any restoration failure reset the token and restart
self.keychainController.removeAllAccessTokens()
deleteBaseDirectory(for: usernameTokenTuple.username)
return .failure(error)
}
}
func userSession(for client: Client) async -> Result<UserSession, UserSessionStoreError> {
switch await setupProxyForClient(client) {
case .success(let clientProxy):
return .success(UserSession(clientProxy: clientProxy,
mediaProvider: MediaProvider(clientProxy: clientProxy, imageCache: ImageCache.default)))
case .failure(let error):
MXLog.error("Failed creating user session with error: \(error)")
return .failure(error)
}
}
func logout(userSession: UserSessionProtocol) {
keychainController.removeAllAccessTokens()
deleteBaseDirectory(for: userSession.clientProxy.userIdentifier)
}
private func restorePreviousLogin(_ usernameTokenTuple: (username: String, accessToken: String)) async -> Result<ClientProxyProtocol, UserSessionStoreError> {
Benchmark.startTrackingForIdentifier("Login", message: "Started restoring previous login")
let basePath = baseDirectoryPath(for: usernameTokenTuple.username)
let loginTask = Task.detached {
try loginWithToken(basePath: basePath,
restoreToken: usernameTokenTuple.accessToken)
}
switch await loginTask.result {
case .success(let client):
return await setupProxyForClient(client)
case .failure(let error):
MXLog.error("Failed restoring login with error: \(error)")
return .failure(.failedRestoringLogin)
}
}
private func setupProxyForClient(_ client: Client) async -> Result<ClientProxyProtocol, UserSessionStoreError> {
Benchmark.endTrackingForIdentifier("Login", message: "Finished login")
do {
let accessToken = try client.restoreToken()
let userId = try client.userId()
keychainController.setAccessToken(accessToken, forUsername: userId)
} catch {
MXLog.error("Failed setting up user session with error: \(error)")
return .failure(.failedSettingUpSession)
}
let clientProxy = ClientProxy(client: client)
return .success((clientProxy))
}
func baseDirectoryPath(for username: String) -> String {
guard var url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
fatalError("Should always be able to retrieve the caches directory")
}
url = url.appendingPathComponent(username)
try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: false, attributes: nil)
return url.path
}
private func deleteBaseDirectory(for username: String) {
guard var url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
fatalError("Should always be able to retrieve the caches directory")
}
url = url.appendingPathComponent(username)
try? FileManager.default.removeItem(at: url)
}
}