Create use case to detect and delete unnecessary account data of client information.

vector/src/main/java/im/vector/app/features/settings/devices/v2/DeleteUnusedClientInformationUseCase.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 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.
+ */
+
+package im.vector.app.features.settings.devices.v2
+
+import im.vector.app.core.di.ActiveSessionHolder
+import im.vector.app.core.session.clientinfo.MATRIX_CLIENT_INFO_KEY_PREFIX
+import javax.inject.Inject
+
+class DeleteUnusedClientInformationUseCase @Inject constructor(
+        private val activeSessionHolder: ActiveSessionHolder,
+) {
+
+    suspend fun execute(deviceFullInfoList: List<DeviceFullInfo>) {
+        val expectedClientInfoKeyList = deviceFullInfoList.map { MATRIX_CLIENT_INFO_KEY_PREFIX + it.deviceInfo.deviceId }
+        activeSessionHolder
+                .getSafeActiveSession()
+                ?.accountDataService()
+                ?.getUserAccountDataEventsStartWith(MATRIX_CLIENT_INFO_KEY_PREFIX)
+                ?.map { it.type }
+                ?.subtract(expectedClientInfoKeyList.toSet())
+                ?.forEach { userAccountDataKeyToDelete ->
+                    activeSessionHolder.getSafeActiveSession()?.accountDataService()?.deleteUserAccountData(userAccountDataKeyToDelete)
+                }
+    }
+}

vector/src/main/java/im/vector/app/features/settings/devices/v2/DevicesViewModel.kt

@@ -51,6 +51,7 @@ class DevicesViewModel @AssistedInject constructor(
         refreshDevicesUseCase: RefreshDevicesUseCase,
         private val vectorPreferences: VectorPreferences,
         private val toggleIpAddressVisibilityUseCase: ToggleIpAddressVisibilityUseCase,
+        private val deleteUnusedClientInformationUseCase: DeleteUnusedClientInformationUseCase,
 ) : VectorSessionsListViewModel<DevicesViewState,
         DevicesAction,
         DevicesViewEvent>(initialState, activeSessionHolder, refreshDevicesUseCase),
@@ -112,6 +113,9 @@ class DevicesViewModel @AssistedInject constructor(
                         val deviceFullInfoList = async.invoke()
                         val unverifiedSessionsCount = deviceFullInfoList.count { !it.cryptoDeviceInfo?.trustLevel?.isCrossSigningVerified().orFalse() }
                         val inactiveSessionsCount = deviceFullInfoList.count { it.isInactive }
+
+                        deleteUnusedClientInformation(deviceFullInfoList)
+
                         copy(
                                 devices = async,
                                 unverifiedSessionsCount = unverifiedSessionsCount,
@@ -125,6 +129,12 @@ class DevicesViewModel @AssistedInject constructor(
                 }
     }
 
+    private fun deleteUnusedClientInformation(deviceFullInfoList: List<DeviceFullInfo>) {
+        viewModelScope.launch {
+            deleteUnusedClientInformationUseCase.execute(deviceFullInfoList)
+        }
+    }
+
     private fun refreshDevicesOnCryptoDevicesChange() {
         viewModelScope.launch {
             refreshDevicesOnCryptoDevicesChangeUseCase.execute()