Update timeline on new session

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/crypto/CryptoService.kt

@@ -25,6 +25,7 @@ import im.vector.matrix.android.api.session.crypto.sas.SasVerificationService
 import im.vector.matrix.android.api.session.events.model.Content
 import im.vector.matrix.android.api.session.events.model.Event
 import im.vector.matrix.android.internal.crypto.MXEventDecryptionResult
+import im.vector.matrix.android.internal.crypto.NewSessionListener
 import im.vector.matrix.android.internal.crypto.model.ImportRoomKeysResult
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.MXEncryptEventContentResult
@@ -107,4 +108,8 @@ interface CryptoService {
 
     fun clearCryptoCache(callback: MatrixCallback<Unit>)
 
+    fun addNewSessionListener(newSessionListener: NewSessionListener)
+
+    fun removeSessionListener(listener: NewSessionListener)
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/timeline/TimelineEvent.kt

@@ -34,6 +34,7 @@ data class TimelineEvent(
         val isUniqueDisplayName: Boolean,
         val senderAvatar: String?,
         val sendState: SendState,
+        val hasClearEventFlag: Boolean = false,
         val annotations: EventAnnotationsSummary? = null
 ) {
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt

@@ -1063,6 +1063,13 @@ internal class CryptoManager @Inject constructor(
                 .executeBy(taskExecutor)
     }
 
+    override fun addNewSessionListener(newSessionListener: NewSessionListener) {
+        roomDecryptorProvider.addNewSessionListener(newSessionListener)
+    }
+
+    override fun removeSessionListener(listener: NewSessionListener) {
+        roomDecryptorProvider.removeSessionListener(listener)
+    }
     /* ==========================================================================================
      * DEBUG INFO
      * ========================================================================================== */

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/NewSessionListener.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2019 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.matrix.android.internal.crypto
+
+
+interface NewSessionListener {
+    fun onNewSession(roomId: String?, senderKey: String, sessionId: String)
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/RoomDecryptorProvider.kt

@@ -34,6 +34,16 @@ internal class RoomDecryptorProvider @Inject constructor(
     // A map from algorithm to MXDecrypting instance, for each room
     private val roomDecryptors: MutableMap<String /* room id */, MutableMap<String /* algorithm */, IMXDecrypting>> = HashMap()
 
+    private val newSessionListeners = ArrayList<NewSessionListener>()
+
+    fun addNewSessionListener(listener: NewSessionListener) {
+        if (!newSessionListeners.contains(listener)) newSessionListeners.add(listener)
+    }
+
+    fun removeSessionListener(listener: NewSessionListener) {
+        newSessionListeners.remove(listener)
+    }
+
     /**
      * Get a decryptor for a given room and algorithm.
      * If we already have a decryptor for the given room and algorithm, return
@@ -64,7 +74,19 @@ internal class RoomDecryptorProvider @Inject constructor(
         val decryptingClass = MXCryptoAlgorithms.hasDecryptorClassForAlgorithm(algorithm)
         if (decryptingClass) {
             val alg = when (algorithm) {
-                MXCRYPTO_ALGORITHM_MEGOLM -> megolmDecryptionFactory.create()
+                MXCRYPTO_ALGORITHM_MEGOLM -> megolmDecryptionFactory.create().apply {
+                    this.newSessionListener = object : NewSessionListener {
+                        override fun onNewSession(rid: String?, senderKey: String, sessionId: String) {
+                            newSessionListeners.forEach {
+                                try {
+                                    it.onNewSession(roomId, senderKey, sessionId)
+                                } catch (e: Throwable) {
+
+                                }
+                            }
+                        }
+                    }
+                }
                 else                      -> olmDecryptionFactory.create()
             }
             if (roomId != null && !TextUtils.isEmpty(roomId)) {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/megolm/MXMegolmDecryption.kt

@@ -55,6 +55,8 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
                                   private val coroutineDispatchers: MatrixCoroutineDispatchers)
     : IMXDecrypting {
 
+    var newSessionListener: NewSessionListener? = null
+
     /**
      * Events which we couldn't decrypt due to unknown sessions / indexes: map from
      * senderKey|sessionId to timelines to list of MatrixEvents.
@@ -203,7 +205,8 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
         if (event.getClearType() == EventType.FORWARDED_ROOM_KEY) {
             Timber.v("## onRoomKeyEvent(), forward adding key : roomId " + roomKeyContent.roomId + " sessionId " + roomKeyContent.sessionId
                     + " sessionKey " + roomKeyContent.sessionKey) // from " + event);
-            val forwardedRoomKeyContent = event.getClearContent().toModel<ForwardedRoomKeyContent>() ?: return
+            val forwardedRoomKeyContent = event.getClearContent().toModel<ForwardedRoomKeyContent>()
+                    ?: return
             forwardingCurve25519KeyChain = if (forwardedRoomKeyContent.forwardingCurve25519KeyChain == null) {
                 ArrayList()
             } else {
@@ -275,43 +278,8 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
      * @param sessionId the session id
      */
     override fun onNewSession(senderKey: String, sessionId: String) {
-        //TODO see how to handle this
         Timber.v("ON NEW SESSION $sessionId - $senderKey")
-        /*val k = "$senderKey|$sessionId"
+        newSessionListener?.onNewSession(null, senderKey, sessionId)
-
-        val pending = pendingEvents[k]
-
-        if (null != pending) {
-            // Have another go at decrypting events sent with this session.
-            pendingEvents.remove(k)
-
-            val timelineIds = pending.keys
-
-            for (timelineId in timelineIds) {
-                val events = pending[timelineId]
-
-                for (event in events!!) {
-                    var result: MXEventDecryptionResult? = null
-
-                    try {
-                        result = decryptEvent(event, timelineId)
-                    } catch (e: MXDecryptionException) {
-                        Timber.e(e, "## onNewSession() : Still can't decrypt " + event.eventId + ". Error")
-                        event.setCryptoError(e.cryptoError)
-                    }
-
-                    if (null != result) {
-                        val fResut = result
-                        CryptoAsyncHelper.getUiHandler().post {
-                            event.setClearData(fResut)
-                            //mSession!!.onEventDecrypted(event)
-                        }
-                        Timber.v("## onNewSession() : successful re-decryption of " + event.eventId)
-                    }
-                }
-            }
-        }
-        */
     }
 
     override fun hasKeysForKeyRequest(request: IncomingRoomKeyRequest): Boolean {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/IMXCryptoStore.kt

@@ -18,6 +18,7 @@
 package im.vector.matrix.android.internal.crypto.store
 
 import im.vector.matrix.android.internal.crypto.IncomingRoomKeyRequest
+import im.vector.matrix.android.internal.crypto.NewSessionListener
 import im.vector.matrix.android.internal.crypto.OutgoingRoomKeyRequest
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.OlmInboundGroupSessionWrapper
@@ -376,4 +377,8 @@ internal interface IMXCryptoStore {
      * @return an IncomingRoomKeyRequest if it exists, else null
      */
     fun getIncomingRoomKeyRequest(userId: String, deviceId: String, requestId: String): IncomingRoomKeyRequest?
+
+    fun addNewSessionListener(listener: NewSessionListener)
+
+    fun removeSessionListener(listener: NewSessionListener)
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/RealmCryptoStore.kt

@@ -19,6 +19,7 @@ package im.vector.matrix.android.internal.crypto.store.db
 import android.text.TextUtils
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.crypto.IncomingRoomKeyRequest
+import im.vector.matrix.android.internal.crypto.NewSessionListener
 import im.vector.matrix.android.internal.crypto.OutgoingRoomKeyRequest
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.OlmInboundGroupSessionWrapper
@@ -57,6 +58,17 @@ internal class RealmCryptoStore(private val enableFileEncryption: Boolean = fals
     // Cache for InboundGroupSession, to release them properly
     private val inboundGroupSessionToRelease = HashMap<String, OlmInboundGroupSessionWrapper>()
 
+
+    private val newSessionListeners = ArrayList<NewSessionListener>()
+
+    override fun addNewSessionListener(listener: NewSessionListener) {
+        if (!newSessionListeners.contains(listener)) newSessionListeners.add(listener)
+    }
+
+    override fun removeSessionListener(listener: NewSessionListener) {
+        newSessionListeners.remove(listener)
+    }
+
     /* ==========================================================================================
      * Other data
      * ========================================================================================== */
@@ -718,4 +730,5 @@ internal class RealmCryptoStore(private val enableFileEncryption: Boolean = fals
                 }
                 .toMutableList()
     }
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/RoomFactory.kt

@@ -64,7 +64,7 @@ internal class RoomFactory @Inject constructor(private val context: Context,
 
     fun create(roomId: String): Room {
         val timelineEventFactory = InMemoryTimelineEventFactory(SenderRoomMemberExtractor(), EventRelationExtractor(), cryptoService)
-        val timelineService = DefaultTimelineService(roomId, monarchy, taskExecutor, timelineEventFactory, contextOfEventTask, paginationTask)
+        val timelineService = DefaultTimelineService(roomId, monarchy, taskExecutor, timelineEventFactory, contextOfEventTask, cryptoService, paginationTask)
         val sendService = DefaultSendService(context, credentials, roomId, eventFactory, cryptoService, monarchy)
         val stateService = DefaultStateService(roomId, taskExecutor, sendStateTask)
         val roomMembersService = DefaultMembershipService(roomId, monarchy, taskExecutor, loadRoomMembersTask, inviteTask, joinRoomTask, leaveRoomTask)

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/DefaultTimeline.kt

@@ -20,11 +20,15 @@ import android.os.Handler
 import android.os.HandlerThread
 import android.os.Looper
 import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.api.session.crypto.CryptoService
 import im.vector.matrix.android.api.session.events.model.EventType
+import im.vector.matrix.android.api.session.events.model.toModel
 import im.vector.matrix.android.api.session.room.timeline.Timeline
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 import im.vector.matrix.android.api.util.CancelableBag
 import im.vector.matrix.android.api.util.addTo
+import im.vector.matrix.android.internal.crypto.NewSessionListener
+import im.vector.matrix.android.internal.crypto.model.event.EncryptedEventContent
 import im.vector.matrix.android.internal.database.mapper.asDomain
 import im.vector.matrix.android.internal.database.model.*
 import im.vector.matrix.android.internal.database.query.findIncludingEvent
@@ -56,6 +60,7 @@ internal class DefaultTimeline(
         private val contextOfEventTask: GetContextOfEventTask,
         private val timelineEventFactory: CacheableTimelineEventFactory,
         private val paginationTask: PaginationTask,
+        private val cryptoService: CryptoService,
         private val allowedTypes: List<String>?
 ) : Timeline {
 
@@ -159,6 +164,33 @@ internal class DefaultTimeline(
             postSnapshot()
     }
 
+    private val newSessionListener = object : NewSessionListener {
+        override fun onNewSession(roomId: String?, senderKey: String, sessionId: String) {
+            if (roomId == this@DefaultTimeline.roomId) {
+                Timber.v("New session id detected for this room")
+                backgroundHandler.get()?.post {
+                    val realm = backgroundRealm.get()
+                    var hasChange = false
+                    builtEvents.forEachIndexed { index, timelineEvent ->
+                        if (timelineEvent.isEncrypted()) {
+                            val eventContent = timelineEvent.root.content.toModel<EncryptedEventContent>()
+                            if (eventContent?.sessionId == sessionId
+                                    && (timelineEvent.root.mClearEvent == null || timelineEvent.root.mCryptoError != null)) {
+                                //we need to rebuild this event
+                                EventEntity.where(realm, eventId = timelineEvent.root.eventId!!).findFirst()?.let {
+                                    builtEvents[index] = timelineEventFactory.create(it, realm)
+                                    hasChange = true
+                                }
+                            }
+                        }
+                    }
+                    if (hasChange) postSnapshot()
+                }
+            }
+        }
+
+    }
+
 // Public methods ******************************************************************************
 
     override fun paginate(direction: Timeline.Direction, count: Int) {
@@ -184,6 +216,7 @@ internal class DefaultTimeline(
             val handler = Handler(handlerThread.looper)
             this.backgroundHandlerThread.set(handlerThread)
             this.backgroundHandler.set(handler)
+            cryptoService.addNewSessionListener(newSessionListener)
             handler.post {
                 val realm = Realm.getInstance(realmConfiguration)
                 backgroundRealm.set(realm)
@@ -211,6 +244,7 @@ internal class DefaultTimeline(
 
     override fun dispose() {
         if (isStarted.compareAndSet(true, false)) {
+            cryptoService.removeSessionListener(newSessionListener)
             Timber.v("Dispose timeline for roomId: $roomId and eventId: $initialEventId")
             backgroundHandler.get()?.post {
                 cancelableBag.cancel()

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/DefaultTimelineService.kt

@@ -19,6 +19,7 @@ package im.vector.matrix.android.internal.session.room.timeline
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MediatorLiveData
 import com.zhuinden.monarchy.Monarchy
+import im.vector.matrix.android.api.session.crypto.CryptoService
 import im.vector.matrix.android.api.session.room.timeline.Timeline
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 import im.vector.matrix.android.api.session.room.timeline.TimelineService
@@ -35,11 +36,20 @@ internal class DefaultTimelineService @Inject constructor(private val roomId: St
                                                           private val taskExecutor: TaskExecutor,
                                                           private val timelineEventFactory: CacheableTimelineEventFactory,
                                                           private val contextOfEventTask: GetContextOfEventTask,
+                                                          private val cryptoService: CryptoService,
                                                           private val paginationTask: PaginationTask
 ) : TimelineService {
 
     override fun createTimeline(eventId: String?, allowedTypes: List<String>?): Timeline {
-        return DefaultTimeline(roomId, eventId, monarchy.realmConfiguration, taskExecutor, contextOfEventTask, timelineEventFactory, paginationTask, allowedTypes)
+        return DefaultTimeline(roomId,
+                eventId,
+                monarchy.realmConfiguration,
+                taskExecutor,
+                contextOfEventTask,
+                timelineEventFactory,
+                paginationTask,
+                cryptoService,
+                allowedTypes)
     }
 
     override fun getTimeLineEvent(eventId: String): TimelineEvent? {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/TimelineEventFactory.kt

@@ -69,6 +69,7 @@ internal class SimpleTimelineEventFactory @Inject constructor(private val roomMe
                 isUniqueDisplayName,
                 senderRoomMember?.avatarUrl,
                 eventEntity.sendState,
+                event.mClearEvent != null,
                 relations
         )
     }
@@ -120,6 +121,7 @@ internal class InMemoryTimelineEventFactory @Inject constructor(private val room
                 senderData.isUniqueDisplayName,
                 senderData.senderAvatar,
                 eventEntity.sendState,
+                event.mClearEvent != null,
                 relations
         )
     }
@@ -138,7 +140,7 @@ internal class InMemoryTimelineEventFactory @Inject constructor(private val room
                 }
                 event.setClearData(result)
             } catch (failure: Throwable) {
-                Timber.e(failure, "Encrypted event: decryption failed")
+                Timber.e("Encrypted event: decryption failed ${failure.localizedMessage}")
                 if (failure is MXDecryptionException) {
                     event.setCryptoError(failure.cryptoError)
                 }