Show alert if user has not beacon and beaconInfo permissions in the room.

ElementX/Resources/Localizations/en-US.lproj/Localizable.strings

@@ -1408,6 +1408,7 @@
 "screen_session_verification_waiting_to_accept_title" = "Waiting to accept request";
 "screen_share_location_live_location_disclaimer_title" = "Your live location history will be stored in the room and visible to members after the session ends.";
 "screen_share_location_live_location_duration_picker_title" = "Choose how long to share your live location.";
+"screen_share_location_live_location_missing_permissions" = "You do not have permissions to share your live location in this room";
 "screen_share_location_title" = "Share location";
 "screen_share_my_location_action" = "Share my location";
 "screen_share_open_apple_maps" = "Open in Apple Maps";

ElementX/Resources/Localizations/en.lproj/Localizable.strings

@@ -1408,6 +1408,7 @@
 "screen_session_verification_waiting_to_accept_title" = "Waiting to accept request";
 "screen_share_location_live_location_disclaimer_title" = "Your live location history will be stored in the room and visible to members after the session ends.";
 "screen_share_location_live_location_duration_picker_title" = "Choose how long to share your live location.";
+"screen_share_location_live_location_missing_permissions" = "You do not have permissions to share your live location in this room";
 "screen_share_location_title" = "Share location";
 "screen_share_my_location_action" = "Share my location";
 "screen_share_open_apple_maps" = "Open in Apple Maps";

ElementX/Sources/Generated/Strings.swift

@@ -3265,6 +3265,8 @@ internal enum L10n {
   internal static var screenShareLocationLiveLocationDisclaimerTitle: String { return L10n.tr("Localizable", "screen_share_location_live_location_disclaimer_title") }
   /// Choose how long to share your live location.
   internal static var screenShareLocationLiveLocationDurationPickerTitle: String { return L10n.tr("Localizable", "screen_share_location_live_location_duration_picker_title") }
+  /// You do not have permissions to share your live location in this room
+  internal static var screenShareLocationLiveLocationMissingPermissions: String { return L10n.tr("Localizable", "screen_share_location_live_location_missing_permissions") }
   /// Share location
   internal static var screenShareLocationTitle: String { return L10n.tr("Localizable", "screen_share_location_title") }
   /// Share my location

ElementX/Sources/Screens/LocationSharing/LocationSharingScreenModels.swift

@@ -13,6 +13,7 @@ import MatrixRustSDK
 enum LocationSharingViewAlert: Hashable {
     case missingAuthorization
     case missingAlwaysAuthorization
+    case missingLiveLocationSharingPermission
     case liveLocationDisclaimer
     case liveLocationDurationSelection
     case mapError(MapLibreError)
@@ -213,6 +214,10 @@ extension AlertInfo where T == LocationSharingViewAlert {
                       message: L10n.dialogPermissionLiveLocationDescriptionIos(InfoPlistReader.main.bundleDisplayName),
                       primaryButton: primaryButton,
                       secondaryButton: secondaryButton)
+        case .missingLiveLocationSharingPermission:
+            self.init(id: alertID,
+                      title: L10n.screenShareLocationLiveLocationMissingPermissions,
+                      primaryButton: primaryButton)
         case .liveLocationDisclaimer:
             self.init(id: alertID,
                       title: L10n.screenShareLocationLiveLocationDisclaimerTitle,

ElementX/Sources/Screens/LocationSharing/LocationSharingScreenViewModel.swift

@@ -68,7 +68,7 @@ class LocationSharingScreenViewModel: LocationSharingScreenViewModelType, Locati
         case .close:
             actionsSubject.send(.close)
         case .startLiveLocation:
-            checkAlwaysShareLocationPermission()
+            startLiveLocation()
         case .selectLocation:
             guard let coordinate = state.bindings.mapCenterLocation else { return }
             let uncertainty = state.isSharingUserLocation ? context.geolocationUncertainty : nil
@@ -171,12 +171,16 @@ class LocationSharingScreenViewModel: LocationSharingScreenViewModelType, Locati
         }
     }
     
-    private static let durationFormatter: DateComponentsFormatter = {
-        let formatter = DateComponentsFormatter()
-        formatter.unitsStyle = .full
-        formatter.allowedUnits = [.hour, .minute]
-        return formatter
-    }()
+    private func startLiveLocation() {
+        guard let powerLevels = roomProxy.infoPublisher.value.powerLevels,
+              powerLevels.canOwnUser(sendStateEvent: .beaconInfo),
+              powerLevels.canOwnUser(sendMessage: .beacon) else {
+            state.bindings.alertInfo = .init(alertID: .missingLiveLocationSharingPermission)
+            return
+        }
+        
+        checkAlwaysShareLocationPermission()
+    }
     
     private func checkAlwaysShareLocationPermission() {
         authorizationStatusSubscription = nil
@@ -231,6 +235,15 @@ class LocationSharingScreenViewModel: LocationSharingScreenViewModelType, Locati
         }
     }
     
+    /// It's easier to achieve the format we want with a DateComponentsFormatter
+    /// than using the `.formatted` function of Duration.
+    private static let durationFormatter: DateComponentsFormatter = {
+        let formatter = DateComponentsFormatter()
+        formatter.unitsStyle = .full
+        formatter.allowedUnits = [.hour, .minute]
+        return formatter
+    }()
+    
     private func showLiveLocationDurationPicker() {
         let durations: [Duration] = [.seconds(15 * 60), // 15 minutes
                                      .seconds(60 * 60), // 1 hour

UnitTests/Sources/LocationSharingScreenViewModelTests.swift

@@ -172,6 +172,16 @@ struct LocationSharingScreenViewModelTests {
         #expect(context.viewState.isLocationLoading)
     }
     
+    // MARK: - Live Location Permission Tests
+    
+    @Test
+    mutating func startLiveLocationWithoutPermission() {
+        setupViewModel(liveLocationManagerConfiguration: .init(authorizationStatus: .authorizedAlways),
+                       members: .allMembers)
+        context.send(viewAction: .startLiveLocation)
+        #expect(context.alertInfo?.id == .missingLiveLocationSharingPermission)
+    }
+    
     // MARK: - Live Location Authorization Tests
     
     @Test
@@ -415,11 +425,12 @@ struct LocationSharingScreenViewModelTests {
     
     // MARK: - Private
     
-    private mutating func setupViewModel(liveLocationManagerConfiguration: LiveLocationManagerMock.Configuration = .init()) {
+    private mutating func setupViewModel(liveLocationManagerConfiguration: LiveLocationManagerMock.Configuration = .init(),
+                                         members: [RoomMemberProxyMock] = .allMembersAsAdmin) {
         timelineProxy = TimelineProxyMock(.init())
         viewModel = LocationSharingScreenViewModel(interactionMode: .picker,
                                                    mapURLBuilder: ServiceLocator.shared.settings.mapTilerConfiguration,
-                                                   roomProxy: JoinedRoomProxyMock(.init()),
+                                                   roomProxy: JoinedRoomProxyMock(.init(members: members)),
                                                    timelineController: MockTimelineController(timelineProxy: timelineProxy),
                                                    liveLocationManager: LiveLocationManagerMock(liveLocationManagerConfiguration),
                                                    analytics: ServiceLocator.shared.analytics,
@@ -428,11 +439,12 @@ struct LocationSharingScreenViewModelTests {
         viewModel.state.bindings.isLocationAuthorized = true
     }
     
-    private mutating func setupViewModel(liveLocationManagerMock: LiveLocationManagerMock) {
+    private mutating func setupViewModel(liveLocationManagerMock: LiveLocationManagerMock,
+                                         members: [RoomMemberProxyMock] = .allMembersAsAdmin) {
         timelineProxy = TimelineProxyMock(.init())
         viewModel = LocationSharingScreenViewModel(interactionMode: .picker,
                                                    mapURLBuilder: ServiceLocator.shared.settings.mapTilerConfiguration,
-                                                   roomProxy: JoinedRoomProxyMock(.init()),
+                                                   roomProxy: JoinedRoomProxyMock(.init(members: members)),
                                                    timelineController: MockTimelineController(timelineProxy: timelineProxy),
                                                    liveLocationManager: liveLocationManagerMock,
                                                    analytics: ServiceLocator.shared.analytics,