Security and privacy part 1 (#3617)

* added the security and settings button in details

* added content to the view

* added enable encryption alert

* updated preview tests and the UI

* removed wrong plists committed by mistake

* pr suggestions

ElementX.xcodeproj/project.pbxproj

@@ -85,6 +85,7 @@
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@@ -466,6 +467,7 @@
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@@ -525,6 +527,7 @@
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+		6B80C24A52411EAF10E06E96 /* SecurityAndPrivacyScreenModels.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7BBADF8010C813D905C172CE /* SecurityAndPrivacyScreenModels.swift */; };
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@@ -552,6 +555,7 @@
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 		71C1347F23868324A4F43940 /* NavigationModule.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9A22A05E472533ED3C5A31B3 /* NavigationModule.swift */; };
+		7254FB2EFDD43BC8BB7A1213 /* SecurityAndPrivacyScreen.swift in Sources */ = {isa = PBXBuildFile; fileRef = B4AE42C19EDE64B7CB7BE4D0 /* SecurityAndPrivacyScreen.swift */; };
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@@ -613,6 +617,7 @@
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+		7C545FFEC9930F7247352593 /* SecurityAndPrivacyScreenViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 978092B01BEAB39F2C4389AE /* SecurityAndPrivacyScreenViewModel.swift */; };
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@@ -993,6 +998,7 @@
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+		CB9FB2BEF313072C705AC9B5 /* SecurityAndPrivacyScreenViewModelTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0315C328FF40F84276364E66 /* SecurityAndPrivacyScreenViewModelTests.swift */; };
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@@ -1322,6 +1328,7 @@
 		029D5701F80A9AF7167BB4D0 /* TimelineModels.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineModels.swift; sourceTree = "<group>"; };
 		02D155E09BF961BBA8F85263 /* InviteUsersScreenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InviteUsersScreenViewModel.swift; sourceTree = "<group>"; };
 		02EE0FABA8ED6D6C1D6CE71D /* ReactionsSummaryView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReactionsSummaryView.swift; sourceTree = "<group>"; };
+		0315C328FF40F84276364E66 /* SecurityAndPrivacyScreenViewModelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreenViewModelTests.swift; sourceTree = "<group>"; };
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@@ -1884,6 +1891,7 @@
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 		7B849D2FF2CC12BA411A1651 /* CreateRoomModels.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CreateRoomModels.swift; sourceTree = "<group>"; };
 		7B9FCA1CFD07B8CF9BD21266 /* FlowCoordinatorProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FlowCoordinatorProtocol.swift; sourceTree = "<group>"; };
+		7BBADF8010C813D905C172CE /* SecurityAndPrivacyScreenModels.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreenModels.swift; sourceTree = "<group>"; };
 		7C1AF829F12FDC99717082D9 /* RoomRolesAndPermissionsScreenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomRolesAndPermissionsScreenViewModel.swift; sourceTree = "<group>"; };
 		7C28B70BEFD3676F11D5D51F /* RoomRolesAndPermissionsScreenCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomRolesAndPermissionsScreenCoordinator.swift; sourceTree = "<group>"; };
 		7C71B9802433F1B4252291BB /* IdentityConfirmationScreenViewModelProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IdentityConfirmationScreenViewModelProtocol.swift; sourceTree = "<group>"; };
@@ -2014,9 +2022,11 @@
 		974AEAF3FE0C577A6C04AD6E /* RoomPermissions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomPermissions.swift; sourceTree = "<group>"; };
 		976ED77B772F50C4BAD757E7 /* MediaEventsTimelineScreenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MediaEventsTimelineScreenViewModel.swift; sourceTree = "<group>"; };
 		9780389F8A53E4D26E23DD03 /* LoginScreenViewModelProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginScreenViewModelProtocol.swift; sourceTree = "<group>"; };
+		978092B01BEAB39F2C4389AE /* SecurityAndPrivacyScreenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreenViewModel.swift; sourceTree = "<group>"; };
 		97B2ACA28A854E41AE3AC9AD /* TimelineViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineViewModel.swift; sourceTree = "<group>"; };
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 		97CE98208321C4D66E363612 /* ShimmerModifier.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShimmerModifier.swift; sourceTree = "<group>"; };
+		97F2F6B6E56055EF173A2DD3 /* SecurityAndPrivacyScreenCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreenCoordinator.swift; sourceTree = "<group>"; };
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@@ -2153,6 +2163,7 @@
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 		B48B7AD4908C5C374517B892 /* MapAssets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = MapAssets.xcassets; sourceTree = "<group>"; };
+		B4AE42C19EDE64B7CB7BE4D0 /* SecurityAndPrivacyScreen.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreen.swift; sourceTree = "<group>"; };
 		B4CFE236419E830E8946639C /* Analytics+SwiftUI.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Analytics+SwiftUI.swift"; sourceTree = "<group>"; };
 		B50F03079F6B5EF9CA005F14 /* TimelineProxyProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineProxyProtocol.swift; sourceTree = "<group>"; };
 		B53AC78E49A297AC1D72A7CF /* AppMediator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppMediator.swift; sourceTree = "<group>"; };
@@ -2282,6 +2293,7 @@
 		CEE20623EB4A9B88FB29F2BA /* fr */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = fr; path = fr.lproj/SAS.strings; sourceTree = "<group>"; };
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 		D01FD1171FF40E34D707FD00 /* BigIcon.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BigIcon.swift; sourceTree = "<group>"; };
+		D046ABB22E680F7C5054441B /* SecurityAndPrivacyScreenViewModelProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecurityAndPrivacyScreenViewModelProtocol.swift; sourceTree = "<group>"; };
 		D071F86CD47582B9196C9D16 /* UserDiscoverySection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDiscoverySection.swift; sourceTree = "<group>"; };
 		D086854995173E897F993C26 /* AdvancedSettingsScreenViewModelProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AdvancedSettingsScreenViewModelProtocol.swift; sourceTree = "<group>"; };
 		D09227E671DB30795C43FFFD /* KnockRequestsListScreenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KnockRequestsListScreenViewModel.swift; sourceTree = "<group>"; };
@@ -3118,6 +3130,14 @@
 			path = Style;
 			sourceTree = "<group>";
 		};
+		31602635E5D50101A3A24D51 /* View */ = {
+			isa = PBXGroup;
+			children = (
+				B4AE42C19EDE64B7CB7BE4D0 /* SecurityAndPrivacyScreen.swift */,
+			);
+			path = View;
+			sourceTree = "<group>";
+		};
 		31CE4DA53232AA534057F912 /* Mocks */ = {
 			isa = PBXGroup;
 			children = (
@@ -4147,6 +4167,7 @@
 				848F69921527D31CAACB93AF /* SecureBackupLogoutConfirmationScreenViewModelTests.swift */,
 				C0FF08D0BD7D0B4B6877AB7D /* SecureBackupRecoveryKeyScreenViewModelTests.swift */,
 				40316EFFEAC7B206EE9A55AE /* SecureBackupScreenViewModelTests.swift */,
+				0315C328FF40F84276364E66 /* SecurityAndPrivacyScreenViewModelTests.swift */,
 				277C20CDD5B64510401B6D0D /* ServerConfigurationScreenViewStateTests.swift */,
 				F08776C48FFB47CACF64ED10 /* ServerConfirmationScreenViewModelTests.swift */,
 				E45EBAFF1A83538D54ABDF92 /* ServerSelectionScreenViewModelTests.swift */,
@@ -5256,6 +5277,18 @@
 			path = RoomDirectorySearchScreen;
 			sourceTree = "<group>";
 		};
+		C59BA103987B953BA374509F /* SecurityAndPrivacyScreen */ = {
+			isa = PBXGroup;
+			children = (
+				97F2F6B6E56055EF173A2DD3 /* SecurityAndPrivacyScreenCoordinator.swift */,
+				7BBADF8010C813D905C172CE /* SecurityAndPrivacyScreenModels.swift */,
+				978092B01BEAB39F2C4389AE /* SecurityAndPrivacyScreenViewModel.swift */,
+				D046ABB22E680F7C5054441B /* SecurityAndPrivacyScreenViewModelProtocol.swift */,
+				31602635E5D50101A3A24D51 /* View */,
+			);
+			path = SecurityAndPrivacyScreen;
+			sourceTree = "<group>";
+		};
 		C844840F3DD48A154C65AE0C /* View */ = {
 			isa = PBXGroup;
 			children = (
@@ -5580,6 +5613,7 @@
 				679E9837ECA8D6776079D16E /* RoomScreen */,
 				2E42D43DB6835A58D88B2F91 /* RoomSelectionScreen */,
 				2565414373E6F68005966B8E /* SecureBackup */,
+				C59BA103987B953BA374509F /* SecurityAndPrivacyScreen */,
 				70B74A432C241E56A7ACE610 /* Settings */,
 				EC4545C7E37E8294D3FE6800 /* StartChatScreen */,
 				15D44FCA9475E660B7F56DB9 /* Timeline */,
@@ -6593,6 +6627,7 @@
 				EB87DF90CF6F8D5D12404C6E /* SecureBackupLogoutConfirmationScreenViewModelTests.swift in Sources */,
 				06B31F84CE52A7A7C271267C /* SecureBackupRecoveryKeyScreenViewModelTests.swift in Sources */,
 				1B8E30B35BF8F541C1318F19 /* SecureBackupScreenViewModelTests.swift in Sources */,
+				CB9FB2BEF313072C705AC9B5 /* SecurityAndPrivacyScreenViewModelTests.swift in Sources */,
 				53A55748D5F587C9061F98BF /* ServerConfigurationScreenViewStateTests.swift in Sources */,
 				89658A44C9FC19B58FD1C226 /* ServerConfirmationScreenViewModelTests.swift in Sources */,
 				67ECD32538F6DAFE38A623F9 /* ServerSelectionScreenViewModelTests.swift in Sources */,
@@ -7327,6 +7362,11 @@
 				DA7E867F5EAFF8E20B2EE3B6 /* SecureBackupScreenModels.swift in Sources */,
 				7BF368A78E6D9AFD222F25AF /* SecureBackupScreenViewModel.swift in Sources */,
 				AC90434798E7894370E80E66 /* SecureBackupScreenViewModelProtocol.swift in Sources */,
+				7254FB2EFDD43BC8BB7A1213 /* SecurityAndPrivacyScreen.swift in Sources */,
+				611BEE29B8B622204E1E6B04 /* SecurityAndPrivacyScreenCoordinator.swift in Sources */,
+				6B80C24A52411EAF10E06E96 /* SecurityAndPrivacyScreenModels.swift in Sources */,
+				7C545FFEC9930F7247352593 /* SecurityAndPrivacyScreenViewModel.swift in Sources */,
+				0D617A152D099D94271D3BA8 /* SecurityAndPrivacyScreenViewModelProtocol.swift in Sources */,
 				08547E55DD3686A84550996D /* SeparatorMediaEventsTimelineView.swift in Sources */,
 				14E99D27628B1A6F0CB46FEA /* SeparatorRoomTimelineItem.swift in Sources */,
 				5341D48F833E3E30F16FA2A3 /* SeparatorRoomTimelineView.swift in Sources */,

ElementX/Sources/FlowCoordinators/RoomFlowCoordinator.swift

@@ -406,6 +406,11 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
             case (.mediaEventsTimeline(let previousState), .dismissMediaEventsTimeline):
                 return previousState
                 
+            case (.roomDetails, .presentSecurityAndPrivacyScreen):
+                return .securityAndPrivacy(previousState: fromState)
+            case (.securityAndPrivacy(let previousState), .dismissSecurityAndPrivacyScreen):
+                return previousState
+            
             default:
                 return nil
             }
@@ -572,6 +577,11 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
             case (.mediaEventsTimeline, .dismissMediaEventsTimeline, .roomDetails):
                 break
                 
+            case (.roomDetails, .presentSecurityAndPrivacyScreen, .securityAndPrivacy):
+                presentSecurityAndPrivacyScreen()
+            case (.securityAndPrivacy, .dismissSecurityAndPrivacyScreen, .roomDetails):
+                break
+            
             // Child flow
             case (_, .startChildFlow(let roomID, let via, let entryPoint), .presentingChild):
                 Task { await self.startChildFlow(for: roomID, via: via, entryPoint: entryPoint) }
@@ -849,6 +859,8 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
                 stateMachine.tryEvent(.presentKnockRequestsListScreen)
             case .presentMediaEventsTimeline:
                 stateMachine.tryEvent(.presentMediaEventsTimeline)
+            case .presentSecurityAndPrivacyScreen:
+                stateMachine.tryEvent(.presentSecurityAndPrivacyScreen)
             }
         }
         .store(in: &cancellables)
@@ -1453,6 +1465,24 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
         }
     }
     
+    private func presentSecurityAndPrivacyScreen() {
+        let coordinator = SecurityAndPrivacyScreenCoordinator(parameters: .init(roomProxy: roomProxy))
+        
+        coordinator.actionsPublisher.sink { [weak self] action in
+            guard let self else { return }
+            
+            switch action {
+            case .done:
+                break
+            }
+        }
+        .store(in: &cancellables)
+        
+        navigationStackCoordinator.push(coordinator) { [weak self] in
+            self?.stateMachine.tryEvent(.dismissSecurityAndPrivacyScreen)
+        }
+    }
+    
     // MARK: - Other flows
     
     private func startChildFlow(for roomID: String, via: [String], entryPoint: RoomFlowCoordinatorEntryPoint) async {
@@ -1604,6 +1634,7 @@ private extension RoomFlowCoordinator {
         case resolveSendFailure
         case knockRequestsList(previousState: State)
         case mediaEventsTimeline(previousState: State)
+        case securityAndPrivacy(previousState: State)
         
         /// A child flow is in progress.
         case presentingChild(childRoomID: String, previousState: State)
@@ -1687,6 +1718,9 @@ private extension RoomFlowCoordinator {
         
         case presentMediaEventsTimeline
         case dismissMediaEventsTimeline
+        
+        case presentSecurityAndPrivacyScreen
+        case dismissSecurityAndPrivacyScreen
     }
 }
 

ElementX/Sources/Screens/RoomDetailsScreen/RoomDetailsScreenCoordinator.swift

@@ -31,6 +31,7 @@ enum RoomDetailsScreenCoordinatorAction {
     case presentPinnedEventsTimeline
     case presentMediaEventsTimeline
     case presentKnockingRequestsListScreen
+    case presentSecurityAndPrivacyScreen
 }
 
 final class RoomDetailsScreenCoordinator: CoordinatorProtocol {
@@ -85,6 +86,8 @@ final class RoomDetailsScreenCoordinator: CoordinatorProtocol {
                     actionsSubject.send(.presentMediaEventsTimeline)
                 case .displayKnockingRequests:
                     actionsSubject.send(.presentKnockingRequestsListScreen)
+                case .displaySecurityAndPrivacy:
+                    actionsSubject.send(.presentSecurityAndPrivacyScreen)
                 }
             }
             .store(in: &cancellables)

ElementX/Sources/Screens/RoomDetailsScreen/RoomDetailsScreenModels.swift

@@ -24,6 +24,7 @@ enum RoomDetailsScreenViewModelAction {
     case displayPinnedEventsTimeline
     case displayMediaEventsTimeline
     case displayKnockingRequests
+    case displaySecurityAndPrivacy
 }
 
 // MARK: View
@@ -56,6 +57,10 @@ struct RoomDetailsScreenViewState: BindableState {
         knockingEnabled && dmRecipient == nil && isKnockableRoom && (canInviteUsers || canKickUsers || canBanUsers)
     }
     
+    var canSeeSecurityAndPrivacy: Bool {
+        knockingEnabled && dmRecipient == nil && canEditRolesOrPermissions
+    }
+    
     var mediaBrowserEnabled = false
     
     var canEdit: Bool {
@@ -198,6 +203,7 @@ enum RoomDetailsScreenViewAction {
     case processTapPolls
     case toggleFavourite(isFavourite: Bool)
     case processTapRolesAndPermissions
+    case processTapSecurityAndPrivacy
     case processTapCall
     case processTapPinnedEvents
     case processTapMediaEvents

ElementX/Sources/Screens/RoomDetailsScreen/RoomDetailsScreenViewModel.swift

@@ -172,6 +172,8 @@ class RoomDetailsScreenViewModel: RoomDetailsScreenViewModelType, RoomDetailsScr
             actionsSubject.send(.displayMediaEventsTimeline)
         case .processTapRequestsToJoin:
             actionsSubject.send(.displayKnockingRequests)
+        case .processTapSecurityAndPrivacy:
+            actionsSubject.send(.displaySecurityAndPrivacy)
         }
     }
     

ElementX/Sources/Screens/RoomDetailsScreen/View/RoomDetailsScreen.swift

@@ -207,6 +207,14 @@ struct RoomDetailsScreen: View {
                 .onChange(of: context.isFavourite) { _, newValue in
                     context.send(viewAction: .toggleFavourite(isFavourite: newValue))
                 }
+            
+            if context.viewState.canSeeSecurityAndPrivacy {
+                ListRow(label: .default(title: L10n.screenRoomDetailsSecurityAndPrivacyTitle,
+                                        icon: \.lock),
+                        kind: .navigationLink {
+                            context.send(viewAction: .processTapSecurityAndPrivacy)
+                        })
+            }
         }
     }
     

ElementX/Sources/Screens/SecurityAndPrivacyScreen/SecurityAndPrivacyScreenCoordinator.swift

@@ -0,0 +1,54 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Combine
+import SwiftUI
+
+struct SecurityAndPrivacyScreenCoordinatorParameters {
+    let roomProxy: JoinedRoomProxyProtocol
+}
+
+enum SecurityAndPrivacyScreenCoordinatorAction {
+    case done
+    
+    // Consider adding CustomStringConvertible conformance if the actions contain PII
+}
+
+final class SecurityAndPrivacyScreenCoordinator: CoordinatorProtocol {
+    private let parameters: SecurityAndPrivacyScreenCoordinatorParameters
+    private let viewModel: SecurityAndPrivacyScreenViewModelProtocol
+    
+    private var cancellables = Set<AnyCancellable>()
+ 
+    private let actionsSubject: PassthroughSubject<SecurityAndPrivacyScreenCoordinatorAction, Never> = .init()
+    var actionsPublisher: AnyPublisher<SecurityAndPrivacyScreenCoordinatorAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+    
+    init(parameters: SecurityAndPrivacyScreenCoordinatorParameters) {
+        self.parameters = parameters
+        
+        viewModel = SecurityAndPrivacyScreenViewModel(roomProxy: parameters.roomProxy)
+    }
+    
+    func start() {
+        viewModel.actionsPublisher.sink { [weak self] action in
+            MXLog.info("Coordinator: received view model action: \(action)")
+            
+            guard let self else { return }
+            switch action {
+            case .done:
+                actionsSubject.send(.done)
+            }
+        }
+        .store(in: &cancellables)
+    }
+        
+    func toPresentable() -> AnyView {
+        AnyView(SecurityAndPrivacyScreen(context: viewModel.context))
+    }
+}

ElementX/Sources/Screens/SecurityAndPrivacyScreen/SecurityAndPrivacyScreenModels.swift

@@ -0,0 +1,54 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Foundation
+
+enum SecurityAndPrivacyScreenViewModelAction {
+    case done
+}
+
+struct SecurityAndPrivacyScreenViewState: BindableState {
+    var bindings: SecurityAndPrivacyScreenViewStateBindings
+    
+    var currentSettings: SecurityAndPrivacySettings
+    
+    var hasChanges: Bool {
+        currentSettings != bindings.desiredSettings
+    }
+    
+    init(accessType: SecurityAndPrivacyRoomAccessType,
+         isEncryptionEnabled: Bool) {
+        let settings = SecurityAndPrivacySettings(accessType: accessType, isEncryptionEnabled: isEncryptionEnabled)
+        currentSettings = settings
+        bindings = SecurityAndPrivacyScreenViewStateBindings(desiredSettings: settings)
+    }
+}
+
+struct SecurityAndPrivacyScreenViewStateBindings {
+    var desiredSettings: SecurityAndPrivacySettings
+    var alertInfo: AlertInfo<SecurityAndPrivacyAlertType>?
+}
+
+struct SecurityAndPrivacySettings: Equatable {
+    var accessType: SecurityAndPrivacyRoomAccessType
+    var isEncryptionEnabled: Bool
+}
+
+enum SecurityAndPrivacyRoomAccessType {
+    case inviteOnly
+    case askToJoin
+    case anyone
+}
+
+enum SecurityAndPrivacyAlertType {
+    case enableEncryption
+}
+
+enum SecurityAndPrivacyScreenViewAction {
+    case save
+    case tryUpdatingEncryption(Bool)
+}

ElementX/Sources/Screens/SecurityAndPrivacyScreen/SecurityAndPrivacyScreenViewModel.swift

@@ -0,0 +1,61 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Combine
+import SwiftUI
+
+typealias SecurityAndPrivacyScreenViewModelType = StateStoreViewModel<SecurityAndPrivacyScreenViewState, SecurityAndPrivacyScreenViewAction>
+
+class SecurityAndPrivacyScreenViewModel: SecurityAndPrivacyScreenViewModelType, SecurityAndPrivacyScreenViewModelProtocol {
+    private let roomProxy: JoinedRoomProxyProtocol
+    
+    private let actionsSubject: PassthroughSubject<SecurityAndPrivacyScreenViewModelAction, Never> = .init()
+    var actionsPublisher: AnyPublisher<SecurityAndPrivacyScreenViewModelAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+
+    init(roomProxy: JoinedRoomProxyProtocol) {
+        self.roomProxy = roomProxy
+        super.init(initialViewState: SecurityAndPrivacyScreenViewState(accessType: roomProxy.infoPublisher.value.roomAccessType,
+                                                                       isEncryptionEnabled: roomProxy.isEncrypted))
+    }
+    
+    // MARK: - Public
+    
+    override func process(viewAction: SecurityAndPrivacyScreenViewAction) {
+        MXLog.info("View model: received view action: \(viewAction)")
+        
+        switch viewAction {
+        case .save:
+            actionsSubject.send(.done)
+        case .tryUpdatingEncryption(let updatedValue):
+            if updatedValue {
+                state.bindings.alertInfo = .init(id: .enableEncryption,
+                                                 title: L10n.screenSecurityAndPrivacyEnableEncryptionAlertTitle,
+                                                 message: L10n.screenSecurityAndPrivacyEnableEncryptionAlertDescription,
+                                                 primaryButton: .init(title: L10n.screenSecurityAndPrivacyEnableEncryptionAlertConfirmButtonTitle,
+                                                                      action: { [weak self] in self?.state.bindings.desiredSettings.isEncryptionEnabled = true }),
+                                                 secondaryButton: .init(title: L10n.actionCancel, role: .cancel, action: nil))
+            } else {
+                state.bindings.desiredSettings.isEncryptionEnabled = false
+            }
+        }
+    }
+}
+
+private extension RoomInfoProxy {
+    var roomAccessType: SecurityAndPrivacyRoomAccessType {
+        switch joinRule {
+        case .invite, .restricted:
+            return .inviteOnly
+        case .knock, .knockRestricted:
+            return .askToJoin
+        default:
+            return .anyone
+        }
+    }
+}

ElementX/Sources/Screens/SecurityAndPrivacyScreen/SecurityAndPrivacyScreenViewModelProtocol.swift

@@ -0,0 +1,14 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Combine
+
+@MainActor
+protocol SecurityAndPrivacyScreenViewModelProtocol {
+    var actionsPublisher: AnyPublisher<SecurityAndPrivacyScreenViewModelAction, Never> { get }
+    var context: SecurityAndPrivacyScreenViewModelType.Context { get }
+}

ElementX/Sources/Screens/SecurityAndPrivacyScreen/View/SecurityAndPrivacyScreen.swift

@@ -0,0 +1,87 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Compound
+import SwiftUI
+
+struct SecurityAndPrivacyScreen: View {
+    @ObservedObject var context: SecurityAndPrivacyScreenViewModel.Context
+    
+    var body: some View {
+        Form {
+            roomAccessSection
+            encryptionSection
+        }
+        .compoundList()
+        .navigationBarTitleDisplayMode(.inline)
+        .navigationTitle(L10n.screenSecurityAndPrivacyTitle)
+        .toolbar { toolbar }
+        .alert(item: $context.alertInfo)
+    }
+    
+    private var roomAccessSection: some View {
+        Section {
+            ListRow(label: .plain(title: L10n.screenSecurityAndPrivacyRoomAccessInviteOnlyOptionTitle,
+                                  description: L10n.screenSecurityAndPrivacyRoomAccessInviteOnlyOptionDescription),
+                    kind: .selection(isSelected: context.desiredSettings.accessType == .inviteOnly) { context.desiredSettings.accessType = .inviteOnly })
+            ListRow(label: .plain(title: L10n.screenSecurityAndPrivacyAskToJoinOptionTitle,
+                                  description: L10n.screenSecurityAndPrivacyAskToJoinOptionDescription),
+                    kind: .selection(isSelected: context.desiredSettings.accessType == .askToJoin) { context.desiredSettings.accessType = .askToJoin })
+            ListRow(label: .plain(title: L10n.screenSecurityAndPrivacyRoomAccessAnyoneOptionTitle,
+                                  description: L10n.screenSecurityAndPrivacyRoomAccessAnyoneOptionDescription),
+                    kind: .selection(isSelected: context.desiredSettings.accessType == .anyone) { context.desiredSettings.accessType = .anyone })
+        } header: {
+            Text(L10n.screenSecurityAndPrivacyRoomAccessSectionTitle)
+                .compoundListSectionHeader()
+        }
+    }
+    
+    @ViewBuilder
+    private var encryptionSection: some View {
+        let encryptionBinding = Binding<Bool>(get: {
+            context.desiredSettings.isEncryptionEnabled
+        }, set: { newValue in
+            context.send(viewAction: .tryUpdatingEncryption(newValue))
+        })
+        
+        Section {
+            ListRow(label: .plain(title: L10n.screenSecurityAndPrivacyEncryptionToggleTitle),
+                    kind: .toggle(encryptionBinding))
+                // We don't allow editing the encryption state if the current setting on the server is `enabled`
+                .disabled(context.viewState.currentSettings.isEncryptionEnabled)
+        } header: {
+            Text(L10n.screenSecurityAndPrivacyEncryptionSectionTitle)
+                .compoundListSectionHeader()
+        } footer: {
+            Text(L10n.screenSecurityAndPrivacyEncryptionSectionFooter)
+                .compoundListSectionFooter()
+        }
+    }
+    
+    @ToolbarContentBuilder
+    var toolbar: some ToolbarContent {
+        ToolbarItem(placement: .confirmationAction) {
+            Button(L10n.actionSave) {
+                context.send(viewAction: .save)
+            }
+            .disabled(!context.viewState.hasChanges)
+        }
+    }
+}
+
+// MARK: - Previews
+
+// TODO: Add back TestablePreview, this is WIP so running preview tests for it is not necessary
+struct SecurityAndPrivacyScreen_Previews: PreviewProvider {
+    static let inviteOnlyViewModel = SecurityAndPrivacyScreenViewModel(roomProxy: JoinedRoomProxyMock(.init(joinRule: .invite)))
+    
+    static var previews: some View {
+        NavigationStack {
+            SecurityAndPrivacyScreen(context: inviteOnlyViewModel.context)
+        }
+    }
+}

UnitTests/Sources/SecurityAndPrivacyScreenViewModelTests.swift

@@ -0,0 +1,19 @@
+//
+// Copyright 2022-2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import XCTest
+
+@testable import ElementX
+
+@MainActor
+class SecurityAndPrivacyScreenViewModelTests: XCTestCase {
+    var viewModel: SecurityAndPrivacyScreenViewModelProtocol!
+    
+    var context: SecurityAndPrivacyScreenViewModelType.Context {
+        viewModel.context
+    }
+}