Onboarding flow coordinator and FTUE changes (#2578)

Fixes #2595, fixes #2594, fixes #2593, fixes #2592, fixes #2591
2026-11-04 01:20:12 +00:00 · 2024-03-21 14:01:23 +02:00
parent 9e6b6ba60a
commit a62c96f1c5
176 changed files with 1886 additions and 912 deletions
@@ -0,0 +1,64 @@
+//
+// 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 Combine
+import SwiftUI
+
+enum SessionVerificationScreenCoordinatorAction {
+    case done
+}
+
+struct SessionVerificationScreenCoordinatorParameters {
+    let sessionVerificationControllerProxy: SessionVerificationControllerProxyProtocol
+}
+
+final class SessionVerificationScreenCoordinator: CoordinatorProtocol {
+    private var viewModel: SessionVerificationScreenViewModelProtocol
+    
+    private let actionsSubject: PassthroughSubject<SessionVerificationScreenCoordinatorAction, Never> = .init()
+    private var cancellables = Set<AnyCancellable>()
+    
+    var actions: AnyPublisher<SessionVerificationScreenCoordinatorAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+    
+    init(parameters: SessionVerificationScreenCoordinatorParameters) {
+        viewModel = SessionVerificationScreenViewModel(sessionVerificationControllerProxy: parameters.sessionVerificationControllerProxy)
+    }
+    
+    // MARK: - Public
+    
+    func start() {
+        viewModel.actions
+            .sink { [weak self] action in
+                guard let self else { return }
+                
+                switch action {
+                case .finished:
+                    actionsSubject.send(.done)
+                }
+            }
+            .store(in: &cancellables)
+    }
+    
+    func stop() {
+        viewModel.stop()
+    }
+    
+    func toPresentable() -> AnyView {
+        AnyView(SessionVerificationScreen(context: viewModel.context))
+    }
+}
@@ -0,0 +1,91 @@
+//
+// 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
+
+enum SessionVerificationScreenViewModelAction {
+    case finished
+}
+
+struct SessionVerificationScreenViewState: BindableState {
+    var verificationState: SessionVerificationScreenStateMachine.State = .initial
+    
+    var title: String? {
+        switch verificationState {
+        case .initial:
+            return L10n.screenSessionVerificationOpenExistingSessionTitle
+        case .requestingVerification:
+            return L10n.screenSessionVerificationWaitingToAcceptTitle
+        case .verificationRequestAccepted:
+            return L10n.screenSessionVerificationCompareEmojisTitle
+        case .startingSasVerification:
+            return nil
+        case .sasVerificationStarted:
+            return nil
+        case .showingChallenge:
+            return L10n.screenSessionVerificationCompareEmojisTitle
+        case .acceptingChallenge:
+            return L10n.screenSessionVerificationCompareEmojisTitle
+        case .decliningChallenge:
+            return nil
+        case .verified:
+            return L10n.commonVerificationComplete
+        case .cancelling:
+            return nil
+        case .cancelled:
+            return L10n.commonVerificationCancelled
+        }
+    }
+    
+    var titleAccessibilityIdentifier: String {
+        verificationState == .verified ? A11yIdentifiers.sessionVerificationScreen.verificationComplete : ""
+    }
+        
+    var message: String {
+        switch verificationState {
+        case .initial:
+            return L10n.screenSessionVerificationOpenExistingSessionSubtitle
+        case .requestingVerification:
+            return L10n.screenSessionVerificationWaitingToAcceptSubtitle
+        case .verificationRequestAccepted:
+            return L10n.screenSessionVerificationRequestAcceptedSubtitle
+        case .startingSasVerification:
+            return L10n.commonWaiting
+        case .sasVerificationStarted:
+            return L10n.commonWaiting
+        case .acceptingChallenge:
+            return L10n.screenSessionVerificationCompareEmojisSubtitle
+        case .decliningChallenge:
+            return L10n.commonWaiting
+        case .cancelling:
+            return L10n.commonWaiting
+        case .showingChallenge:
+            return L10n.screenSessionVerificationCompareEmojisSubtitle
+        case .verified:
+            return L10n.screenSessionVerificationCompleteSubtitle
+        case .cancelled:
+            return L10n.screenSessionVerificationCancelledSubtitle
+        }
+    }
+}
+
+enum SessionVerificationScreenViewAction {
+    case requestVerification
+    case startSasVerification
+    case restart
+    case accept
+    case decline
+}
@@ -0,0 +1,148 @@
+//
+// 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 SwiftState
+
+class SessionVerificationScreenStateMachine {
+    /// States the SessionVerificationViewModel can find itself in
+    enum State: StateType {
+        /// The initial state, before verification started
+        case initial
+        /// Waiting for verification acceptance
+        case requestingVerification
+        /// Verification request accepted. Waiting for start
+        case verificationRequestAccepted
+        /// Waiting for SaS verification start
+        case startingSasVerification
+        /// A SaS verification flow has been started
+        case sasVerificationStarted
+        /// Verification accepted and emojis received
+        case showingChallenge(emojis: [SessionVerificationEmoji])
+        /// Emojis match locally
+        case acceptingChallenge(emojis: [SessionVerificationEmoji])
+        /// Emojis do not match locally
+        case decliningChallenge(emojis: [SessionVerificationEmoji])
+        /// Verification successful
+        case verified
+        /// User requested verification cancellation
+        case cancelling
+        /// The verification has been cancelled, remotely or locally
+        case cancelled
+    }
+    
+    /// Events that can be triggered on the SessionVerification state machine
+    enum Event: EventType {
+        /// Request verification
+        case requestVerification
+        /// The current verification request has been accepted
+        case didAcceptVerificationRequest
+        /// Start a SaS verification flow
+        case startSasVerification
+        /// Started a SaS verification flow
+        case didStartSasVerification
+        /// Has received emojis
+        case didReceiveChallenge(emojis: [SessionVerificationEmoji])
+        /// Emojis match
+        case acceptChallenge
+        /// Emojis do not match
+        case declineChallenge
+        /// Remote accepted challenge
+        case didAcceptChallenge
+        /// Request cancellation
+        case cancel
+        /// Verification cancelled
+        case didCancel
+        /// Request failed
+        case didFail
+        /// Restart the verification flow
+        case restart
+    }
+    
+    private let stateMachine: StateMachine<State, Event>
+    
+    var state: State {
+        stateMachine.state
+    }
+
+    init() {
+        stateMachine = StateMachine(state: .initial)
+        configure()
+    }
+    
+    private func configure() {
+        stateMachine.addRoutes(event: .requestVerification, transitions: [.initial => .requestingVerification])
+        stateMachine.addRoutes(event: .didAcceptVerificationRequest, transitions: [.requestingVerification => .verificationRequestAccepted])
+        stateMachine.addRoutes(event: .startSasVerification, transitions: [.verificationRequestAccepted => .startingSasVerification])
+        stateMachine.addRoutes(event: .didFail, transitions: [.requestingVerification => .initial])
+        stateMachine.addRoutes(event: .restart, transitions: [.cancelled => .initial])
+        
+        // Transitions with associated values need to be handled through `addRouteMapping`
+        stateMachine.addRouteMapping { event, fromState, _ in
+            switch (fromState, event) {
+            case (_, .didStartSasVerification):
+                return .sasVerificationStarted
+                
+            case (.sasVerificationStarted, .didReceiveChallenge(let emojis)):
+                return .showingChallenge(emojis: emojis)
+            case (.showingChallenge(let emojis), .acceptChallenge):
+                return .acceptingChallenge(emojis: emojis)
+            case (.acceptingChallenge(let emojis), .didFail):
+                return .showingChallenge(emojis: emojis)
+                
+            case (.acceptingChallenge, .didAcceptChallenge):
+                return .verified
+                
+            case (.showingChallenge(let emojis), .declineChallenge):
+                return .decliningChallenge(emojis: emojis)
+            case (.decliningChallenge(let emojis), .didFail):
+                return .showingChallenge(emojis: emojis)
+                
+            case (_, .cancel):
+                return .cancelling
+            case (_, .didCancel):
+                return .cancelled
+                
+            default:
+                return nil
+            }
+        }
+        
+        addTransitionHandler { context in
+            if let event = context.event {
+                MXLog.info("Transitioning from `\(context.fromState)` to `\(context.toState)` with event `\(event)`")
+            } else {
+                MXLog.info("Transitioning from \(context.fromState)` to `\(context.toState)`")
+            }
+        }
+    }
+    
+    /// Attempt to move the state machine to another state through an event
+    /// It will either invoke the `transitionHandler` or the `errorHandler` depending on its current state
+    func processEvent(_ event: Event) {
+        stateMachine.tryEvent(event)
+    }
+    
+    /// Registers a callback for processing state machine transitions
+    func addTransitionHandler(_ handler: @escaping StateMachine<State, Event>.Handler) {
+        stateMachine.addAnyHandler(.any => .any, handler: handler)
+    }
+    
+    /// Registers a callback for processing state machine errors
+    func addErrorHandler(_ handler: @escaping StateMachine<State, Event>.Handler) {
+        stateMachine.addErrorHandler(handler: handler)
+    }
+}
@@ -0,0 +1,182 @@
+//
+// 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 Combine
+import SwiftUI
+
+typealias SessionVerificationViewModelType = StateStoreViewModel<SessionVerificationScreenViewState, SessionVerificationScreenViewAction>
+
+class SessionVerificationScreenViewModel: SessionVerificationViewModelType, SessionVerificationScreenViewModelProtocol {
+    private let sessionVerificationControllerProxy: SessionVerificationControllerProxyProtocol
+    
+    private var stateMachine: SessionVerificationScreenStateMachine
+
+    private var actionsSubject: PassthroughSubject<SessionVerificationScreenViewModelAction, Never> = .init()
+    
+    var actions: AnyPublisher<SessionVerificationScreenViewModelAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+
+    init(sessionVerificationControllerProxy: SessionVerificationControllerProxyProtocol,
+         verificationState: SessionVerificationScreenStateMachine.State = .initial) {
+        self.sessionVerificationControllerProxy = sessionVerificationControllerProxy
+        
+        stateMachine = SessionVerificationScreenStateMachine()
+        
+        super.init(initialViewState: .init(verificationState: verificationState))
+        
+        setupStateMachine()
+        
+        sessionVerificationControllerProxy.callbacks
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] callback in
+                guard let self else { return }
+                
+                switch callback {
+                case .acceptedVerificationRequest:
+                    self.stateMachine.processEvent(.didAcceptVerificationRequest)
+                case .startedSasVerification:
+                    self.stateMachine.processEvent(.didStartSasVerification)
+                case .receivedVerificationData(let emojis):
+                    guard self.stateMachine.state == .sasVerificationStarted else {
+                        MXLog.warning("Callbacks: Ignoring receivedVerificationData due to invalid state.")
+                        return
+                    }
+                    
+                    self.stateMachine.processEvent(.didReceiveChallenge(emojis: emojis))
+                case .finished:
+                    self.stateMachine.processEvent(.didAcceptChallenge)
+                case .cancelled:
+                    self.stateMachine.processEvent(.didCancel)
+                case .failed:
+                    self.stateMachine.processEvent(.didFail)
+                }
+            }
+            .store(in: &cancellables)
+    }
+    
+    override func process(viewAction: SessionVerificationScreenViewAction) {
+        switch viewAction {
+        case .requestVerification:
+            stateMachine.processEvent(.requestVerification)
+        case .startSasVerification:
+            stateMachine.processEvent(.startSasVerification)
+        case .restart:
+            stateMachine.processEvent(.restart)
+        case .accept:
+            stateMachine.processEvent(.acceptChallenge)
+        case .decline:
+            stateMachine.processEvent(.declineChallenge)
+        }
+    }
+    
+    func stop() {
+        let uncancellableStates: [SessionVerificationScreenStateMachine.State] = [.initial, .verified, .cancelled]
+        
+        if !uncancellableStates.contains(stateMachine.state) {
+            stateMachine.processEvent(.cancel)
+        }
+    }
+    
+    // MARK: - Private
+    
+    private func setupStateMachine() {
+        stateMachine.addTransitionHandler { [weak self] context in
+            guard let self else { return }
+                
+            state.verificationState = context.toState
+            
+            switch (context.fromState, context.event, context.toState) {
+            case (.initial, .requestVerification, .requestingVerification):
+                requestVerification()
+            case (.verificationRequestAccepted, .startSasVerification, .startingSasVerification):
+                startSasVerification()
+            case (.showingChallenge, .acceptChallenge, .acceptingChallenge):
+                acceptChallenge()
+            case (.showingChallenge, .declineChallenge, .decliningChallenge):
+                declineChallenge()
+            case (_, .cancel, .cancelling):
+                cancelVerification()
+            case (_, _, .verified):
+                actionsSubject.send(.finished)
+            default:
+                break
+            }
+        }
+        
+        stateMachine.addErrorHandler { context in
+            MXLog.error("Failed transition with context: \(context)")
+        }
+    }
+    
+    private func requestVerification() {
+        Task {
+            switch await sessionVerificationControllerProxy.requestVerification() {
+            case .success:
+                // Need to wait for the callback from the remote
+                break
+            case .failure:
+                stateMachine.processEvent(.didFail)
+            }
+        }
+    }
+    
+    private func cancelVerification() {
+        Task {
+            switch await sessionVerificationControllerProxy.cancelVerification() {
+            case .success:
+                stateMachine.processEvent(.didCancel)
+            case .failure:
+                stateMachine.processEvent(.didFail)
+            }
+        }
+    }
+    
+    private func startSasVerification() {
+        Task {
+            switch await sessionVerificationControllerProxy.startSasVerification() {
+            case .success:
+                // Need to wait for the callback from the remote
+                break
+            case .failure:
+                stateMachine.processEvent(.didFail)
+            }
+        }
+    }
+    
+    private func acceptChallenge() {
+        Task {
+            switch await sessionVerificationControllerProxy.approveVerification() {
+            case .success:
+                // Need to wait for the callback from the remote
+                break
+            case .failure:
+                stateMachine.processEvent(.didFail)
+            }
+        }
+    }
+    
+    private func declineChallenge() {
+        Task {
+            switch await sessionVerificationControllerProxy.declineVerification() {
+            case .success:
+                stateMachine.processEvent(.didCancel)
+            case .failure:
+                stateMachine.processEvent(.didFail)
+            }
+        }
+    }
+}
@@ -0,0 +1,25 @@
+//
+// 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 Combine
+
+@MainActor
+protocol SessionVerificationScreenViewModelProtocol {
+    var actions: AnyPublisher<SessionVerificationScreenViewModelAction, Never> { get }
+    var context: SessionVerificationViewModelType.Context { get }
+    
+    func stop()
+}
@@ -0,0 +1,233 @@
+//
+// 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 SwiftUI
+
+struct SessionVerificationScreen: View {
+    @ObservedObject var context: SessionVerificationScreenViewModel.Context
+    
+    var body: some View {
+        FullscreenDialog {
+            VStack(spacing: 32) {
+                screenHeader
+                Spacer()
+                mainContent
+            }
+        } bottomContent: {
+            actionButtons
+        }
+        .background()
+        .environment(\.backgroundStyle, AnyShapeStyle(Color.compound.bgCanvasDefault))
+        .interactiveDismissDisabled()
+    }
+    
+    // MARK: - Private
+    
+    private var headerImageName: String {
+        switch context.viewState.verificationState {
+        case .initial:
+            return "lock"
+        case .cancelled:
+            return "exclamationmark.shield"
+        case .requestingVerification:
+            return "hourglass"
+        case .verificationRequestAccepted:
+            return "face.smiling"
+        case .startingSasVerification:
+            return "hourglass"
+        case .sasVerificationStarted:
+            return "hourglass"
+        case .cancelling:
+            return "hourglass"
+        case .acceptingChallenge:
+            return "hourglass"
+        case .decliningChallenge:
+            return "hourglass"
+        case .showingChallenge:
+            return "face.smiling"
+        case .verified:
+            return "checkmark.shield"
+        }
+    }
+    
+    @ViewBuilder
+    private var screenHeader: some View {
+        VStack(spacing: 0) {
+            if context.viewState.verificationState == .initial {
+                HeroImage(icon: \.lockSolid)
+                    .padding(.bottom, 16)
+            } else {
+                Image(systemName: headerImageName)
+                    .heroImage()
+                    .padding(.bottom, 16)
+            }
+            
+            Text(context.viewState.title ?? "")
+                .font(.compound.headingMDBold)
+                .multilineTextAlignment(.center)
+                .foregroundColor(.compound.textPrimary)
+                .padding(.bottom, 8)
+                .accessibilityIdentifier(context.viewState.titleAccessibilityIdentifier)
+
+            Text(context.viewState.message)
+                .font(.compound.bodyMD)
+                .multilineTextAlignment(.center)
+                .foregroundColor(.compound.textSecondary)
+        }
+    }
+    
+    @ViewBuilder
+    private var mainContent: some View {
+        switch context.viewState.verificationState {
+        case .showingChallenge(let emojis):
+            emojisPanel(with: emojis)
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.emojiWrapper)
+        case .acceptingChallenge(let emojis):
+            emojisPanel(with: emojis)
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.emojiWrapper)
+        case .requestingVerification:
+            ProgressView()
+                .tint(.compound.textSecondary)
+                .scaleEffect(2)
+        default:
+            // In All other cases, we just want an empty view
+            EmptyView()
+        }
+    }
+    
+    @ViewBuilder
+    private func emojisPanel(with emojis: [SessionVerificationEmoji]) -> some View {
+        VStack(spacing: 32) {
+            HStack(spacing: 16) {
+                ForEach(emojis.prefix(4), id: \.self) { emoji in
+                    EmojiView(emoji: emoji)
+                }
+            }
+            HStack(spacing: 16) {
+                ForEach(emojis.suffix(from: 4), id: \.self) { emoji in
+                    EmojiView(emoji: emoji)
+                }
+            }
+        }
+    }
+    
+    @ViewBuilder
+    private var actionButtons: some View {
+        switch context.viewState.verificationState {
+        case .initial:
+            VStack(spacing: 32) {
+                Button(L10n.actionStartVerification) {
+                    context.send(viewAction: .requestVerification)
+                }
+                .buttonStyle(.compound(.primary))
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.requestVerification)
+            }
+        case .cancelled:
+            Button(L10n.actionRetry) {
+                context.send(viewAction: .restart)
+            }
+            .buttonStyle(.compound(.primary))
+            
+        case .verificationRequestAccepted:
+            Button(L10n.actionStart) {
+                context.send(viewAction: .startSasVerification)
+            }
+            .buttonStyle(.compound(.primary))
+            .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.startSasVerification)
+        
+        case .showingChallenge:
+            VStack(spacing: 32) {
+                Button(L10n.screenSessionVerificationTheyMatch) {
+                    context.send(viewAction: .accept)
+                }
+                .buttonStyle(.compound(.primary))
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.acceptChallenge)
+                
+                Button(L10n.screenSessionVerificationTheyDontMatch) {
+                    context.send(viewAction: .decline)
+                }
+                .font(.compound.bodyLGSemibold)
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.declineChallenge)
+            }
+            
+        case .acceptingChallenge:
+            VStack(spacing: 32) {
+                Button { context.send(viewAction: .accept) } label: {
+                    HStack(spacing: 16) {
+                        ProgressView()
+                            .tint(.compound.textOnSolidPrimary)
+                        Text(L10n.screenSessionVerificationTheyMatch)
+                    }
+                }
+                .buttonStyle(.compound(.primary))
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.acceptChallenge)
+                .disabled(true)
+
+                Button(L10n.screenSessionVerificationTheyDontMatch) {
+                    context.send(viewAction: .decline)
+                }
+                .font(.compound.bodyLGSemibold)
+                .accessibilityIdentifier(A11yIdentifiers.sessionVerificationScreen.declineChallenge)
+                .disabled(true)
+            }
+
+        default:
+            EmptyView()
+        }
+    }
+    
+    struct EmojiView: View {
+        let emoji: SessionVerificationEmoji
+        
+        var body: some View {
+            VStack(spacing: 16.0) {
+                Text(emoji.symbol)
+                    .font(.compound.headingXLBold)
+                Text(emoji.localizedDescription)
+                    .font(.compound.bodyMD)
+                    .foregroundColor(.compound.textSecondary)
+            }
+            .padding(8.0)
+        }
+    }
+}
+
+// MARK: - Previews
+
+struct SessionVerification_Previews: PreviewProvider, TestablePreview {
+    static var previews: some View {
+        sessionVerificationScreen(state: .initial)
+            .previewDisplayName("Initial")
+        sessionVerificationScreen(state: .requestingVerification)
+            .previewDisplayName("Requesting Verification")
+        sessionVerificationScreen(state: .verificationRequestAccepted)
+            .previewDisplayName("Request Accepted")
+        sessionVerificationScreen(state: .cancelled)
+            .previewDisplayName("Cancelled")
+        
+        sessionVerificationScreen(state: .showingChallenge(emojis: SessionVerificationControllerProxyMock.emojis))
+            .previewDisplayName("Showing Challenge")
+        sessionVerificationScreen(state: .verified)
+            .previewDisplayName("Verified")
+    }
+    
+    static func sessionVerificationScreen(state: SessionVerificationScreenStateMachine.State) -> some View {
+        let viewModel = SessionVerificationScreenViewModel(sessionVerificationControllerProxy: SessionVerificationControllerProxyMock.configureMock(),
+                                                           verificationState: state)
+        
+        return SessionVerificationScreen(context: viewModel.context)
+    }
+}