fix: use server time for calling (WPB-10979) (#3017)

* fix: use server time for calling

* chore: address comments

* fix: get serverTime after websocket is connected

* chore: cleanup

* chore: broken unit test

logic/src/commonJvmAndroid/kotlin/com/wire/kalium/logic/feature/call/CallManagerImpl.kt

@@ -78,6 +78,8 @@ import com.wire.kalium.logic.feature.call.usecase.GetCallConversationTypeProvide
 import com.wire.kalium.logic.feature.message.MessageSender
 import com.wire.kalium.logic.featureFlags.KaliumConfigs
 import com.wire.kalium.logic.functional.fold
+import com.wire.kalium.logic.util.ServerTimeHandler
+import com.wire.kalium.logic.util.ServerTimeHandlerImpl
 import com.wire.kalium.logic.util.toInt
 import com.wire.kalium.network.NetworkStateObserver
 import com.wire.kalium.util.KaliumDispatcher
@@ -119,6 +121,7 @@ class CallManagerImpl internal constructor(
     private val flowManagerService: FlowManagerService,
     private val json: Json = Json { ignoreUnknownKeys = true },
     private val shouldRemoteMuteChecker: ShouldRemoteMuteChecker = ShouldRemoteMuteCheckerImpl(),
+    private val serverTimeHandler: ServerTimeHandler = ServerTimeHandlerImpl(),
     kaliumDispatchers: KaliumDispatcher = KaliumDispatcherImpl
 ) : CallManager {
 
@@ -255,8 +258,6 @@ class CallManagerImpl internal constructor(
         )
 
         if (callingValue.type != REMOTE_MUTE_TYPE || shouldRemoteMute) {
-            val currTime = System.currentTimeMillis()
-
             val targetConversationId = if (message.isSelfMessage) {
                 content.conversationId ?: message.conversationId
             } else {
@@ -270,7 +271,7 @@ class CallManagerImpl internal constructor(
                 inst = deferredHandle.await(),
                 msg = msg,
                 len = msg.size,
-                curr_time = Uint32_t(value = currTime / 1000),
+                curr_time = Uint32_t(value = serverTimeHandler.toServerTimestamp()),
                 msg_time = Uint32_t(value = message.date.epochSeconds),
                 convId = federatedIdMapper.parseToFederatedId(targetConversationId),
                 userId = federatedIdMapper.parseToFederatedId(message.senderUserId),

logic/src/commonMain/kotlin/com/wire/kalium/logic/data/event/Event.kt

@@ -57,7 +57,7 @@ import kotlinx.serialization.json.JsonNull
  */
 data class EventEnvelope(
     val event: Event,
-    val deliveryInfo: EventDeliveryInfo,
+    val deliveryInfo: EventDeliveryInfo
 ) {
     override fun toString(): String {
         return super.toString()

logic/src/commonMain/kotlin/com/wire/kalium/logic/data/event/EventRepository.kt

@@ -85,6 +85,7 @@ interface EventRepository {
      * @return Either containing a [CoreFailure] or the oldest available event ID as a String.
      */
     suspend fun fetchOldestAvailableEventId(): Either<CoreFailure, String>
+    suspend fun fetchServerTime(): String?
 }
 
 class EventDataSource(
@@ -193,6 +194,15 @@ class EventDataSource(
             }
         }.map { it.id }
 
+    override suspend fun fetchServerTime(): String? {
+        val result = notificationApi.getServerTime(NOTIFICATIONS_QUERY_SIZE)
+        return if (result.isSuccessful()) {
+            result.value
+        } else {
+            null
+        }
+    }
+
     private companion object {
         const val NOTIFICATIONS_QUERY_SIZE = 100
         const val LAST_PROCESSED_EVENT_ID_KEY = "last_processed_event_id"

logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt

@@ -918,24 +918,23 @@ class UserSessionScope internal constructor(
             kaliumFileSystem = kaliumFileSystem
         )
 
-    private val eventGatherer: EventGatherer
-        get() = EventGathererImpl(
-            eventRepository,
-            incrementalSyncRepository,
-            userScopedLogger,
-        )
+    private val eventGatherer: EventGatherer get() = EventGathererImpl(
+        eventRepository = eventRepository,
+        incrementalSyncRepository = incrementalSyncRepository,
+        logger = userScopedLogger
+    )
 
     private val eventProcessor: EventProcessor by lazy {
         EventProcessorImpl(
-            eventRepository,
-            conversationEventReceiver,
-            userEventReceiver,
-            teamEventReceiver,
-            featureConfigEventReceiver,
-            userPropertiesEventReceiver,
-            federationEventReceiver,
-            this@UserSessionScope,
-            userScopedLogger,
+            eventRepository = eventRepository,
+            conversationEventReceiver = conversationEventReceiver,
+            userEventReceiver = userEventReceiver,
+            teamEventReceiver = teamEventReceiver,
+            featureConfigEventReceiver = featureConfigEventReceiver,
+            userPropertiesEventReceiver = userPropertiesEventReceiver,
+            federationEventReceiver = federationEventReceiver,
+            processingScope = this@UserSessionScope,
+            logger = userScopedLogger,
         )
     }
 

logic/src/commonMain/kotlin/com/wire/kalium/logic/sync/incremental/EventGatherer.kt

@@ -34,6 +34,8 @@ import com.wire.kalium.logic.functional.onFailure
 import com.wire.kalium.logic.functional.onSuccess
 import com.wire.kalium.logic.kaliumLogger
 import com.wire.kalium.logic.sync.KaliumSyncException
+import com.wire.kalium.logic.util.ServerTimeHandler
+import com.wire.kalium.logic.util.ServerTimeHandlerImpl
 import com.wire.kalium.network.api.base.authenticated.notification.WebSocketEvent
 import com.wire.kalium.network.exceptions.KaliumException
 import io.ktor.http.HttpStatusCode
@@ -52,6 +54,7 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.flow.transformWhile
+import kotlinx.datetime.toInstant
 
 /**
  * Responsible for fetching events from a remote source, orchestrating between events missed since
@@ -77,6 +80,7 @@ internal interface EventGatherer {
 internal class EventGathererImpl(
     private val eventRepository: EventRepository,
     private val incrementalSyncRepository: IncrementalSyncRepository,
+    private val serverTimeHandler: ServerTimeHandler = ServerTimeHandlerImpl(),
     logger: KaliumLogger = kaliumLogger,
 ) : EventGatherer {
 
@@ -165,6 +169,7 @@ internal class EventGathererImpl(
 
     private suspend fun FlowCollector<EventEnvelope>.onWebSocketOpen() {
         logger.i("Websocket Open")
+        handleTimeDrift()
         eventRepository
             .pendingEvents()
             .onEach { result ->
@@ -181,6 +186,12 @@ internal class EventGathererImpl(
         _currentSource.value = EventSource.LIVE
     }
 
+    private suspend fun handleTimeDrift() {
+        eventRepository.fetchServerTime()?.let {
+            serverTimeHandler.computeTimeOffset(it.toInstant().epochSeconds)
+        }
+    }
+
     private fun throwPendingEventException(failure: CoreFailure) {
         val networkCause = (failure as? NetworkFailure.ServerMiscommunication)?.rootCause
         val isEventNotFound = networkCause is KaliumException.InvalidRequestError

logic/src/commonMain/kotlin/com/wire/kalium/logic/util/ServerTimeHandler.kt

@@ -0,0 +1,54 @@
+/*
+ * Wire
+ * Copyright (C) 2024 Wire Swiss GmbH
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+package com.wire.kalium.logic.util
+
+import com.wire.kalium.logic.kaliumLogger
+import kotlinx.datetime.Clock
+
+internal interface ServerTimeHandler {
+    fun computeTimeOffset(serverTime: Long)
+    fun toServerTimestamp(localTimestamp: Long = Clock.System.now().epochSeconds): Long
+}
+
+internal class ServerTimeHandlerImpl : ServerTimeHandler {
+
+    /**
+     * Used to store the difference (offset) between the server time and the local client time.
+     * And it will be used to adjust timestamps between server and client times.
+     */
+    private var timeOffset: Long = 0
+
+    /**
+     * Compute the time offset between the server and the client
+     * @param serverTime the server time to compute the offset
+     */
+    override fun computeTimeOffset(serverTime: Long) {
+        kaliumLogger.i("ServerTimeHandler: computing time offset between server and client..")
+        val offset = Clock.System.now().epochSeconds - serverTime
+        timeOffset = offset
+    }
+
+    /**
+     * Convert local timestamp to server timestamp
+     * @param localTimestamp timestamp from client to convert
+     * @return the timestamp adjusted with the client/server time shift
+     */
+    override fun toServerTimestamp(localTimestamp: Long): Long {
+        return localTimestamp - timeOffset
+    }
+}

logic/src/commonTest/kotlin/com/wire/kalium/logic/data/event/EventRepositoryTest.kt

@@ -52,6 +52,8 @@ import kotlinx.datetime.Instant
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertIs
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
 
 class EventRepositoryTest {
 
@@ -136,6 +138,34 @@ class EventRepositoryTest {
             }
     }
 
+    @Test
+    fun givenAPIFailure_whenFetchingServerTime_thenReturnNull() = runTest {
+        val (_, eventRepository) = Arrangement()
+            .withGetServerTimeReturning(NetworkResponse.Error(KaliumException.NoNetwork()))
+            .arrange()
+
+        val result = eventRepository.fetchServerTime()
+
+        assertNull(result)
+    }
+
+
+    @Test
+    fun givenAPISucceeds_whenFetchingServerTime_thenReturnTime() = runTest {
+        val result = NetworkResponse.Success(
+            value = "123434545",
+            headers = mapOf(),
+            httpCode = HttpStatusCode.OK.value
+        )
+        val (_, eventRepository) = Arrangement()
+            .withGetServerTimeReturning(result)
+            .arrange()
+
+        val time = eventRepository.fetchServerTime()
+
+        assertNotNull(time)
+    }
+
     private companion object {
         const val LAST_PROCESSED_EVENT_ID_KEY = "last_processed_event_id"
     }
@@ -158,12 +188,6 @@ class EventRepositoryTest {
             }
         }
 
-        suspend fun withDeleteMetadataSucceeding() = apply {
-            coEvery {
-                metaDAO.deleteValue(any())
-            }.returns(Unit)
-        }
-
         suspend fun withLastStoredEventId(value: String?) = apply {
             coEvery {
                 metaDAO.valueByKey(LAST_PROCESSED_EVENT_ID_KEY)
@@ -176,15 +200,15 @@ class EventRepositoryTest {
             }.returns(result)
         }
 
-        suspend fun withLastNotificationRemote(result: NetworkResponse<EventResponse>) = apply {
+        suspend fun withOldestNotificationReturning(result: NetworkResponse<EventResponse>) = apply {
             coEvery {
-                notificationApi.mostRecentNotification(any())
+                notificationApi.oldestNotification(any())
             }.returns(result)
         }
 
-        suspend fun withOldestNotificationReturning(result: NetworkResponse<EventResponse>) = apply {
+        suspend fun withGetServerTimeReturning(result: NetworkResponse<String>) = apply {
             coEvery {
-                notificationApi.oldestNotification(any())
+                notificationApi.getServerTime(any())
             }.returns(result)
         }
 

logic/src/commonTest/kotlin/com/wire/kalium/logic/framework/TestEvent.kt

@@ -249,7 +249,10 @@ object TestEvent {
         id = "eventId",
     )
 
-    fun Event.wrapInEnvelope(isTransient: Boolean = false, source: EventSource = EventSource.LIVE): EventEnvelope {
+    fun Event.wrapInEnvelope(
+        isTransient: Boolean = false,
+        source: EventSource = EventSource.LIVE
+    ): EventEnvelope {
         return EventEnvelope(this, EventDeliveryInfo(isTransient, source))
     }