Reply In Thread, create a new thread timeline

2024-11-16 02:05:06 +08:00 · 2021-11-08 20:46:37 +02:00 · 2021-11-08 20:46:37 +02:00 · ecc9b59ad1
commit ecc9b59ad1
parent cb0fefa74d
26 changed files with 340 additions and 154 deletions
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/Event.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/Event.kt
@ -96,6 +96,9 @@ data class Event(
    @Transient
    var sendStateDetails: String? = null

+    @Transient
+    var isRootThread: Boolean = false
+
    fun sendStateError(): MatrixError? {
        return sendStateDetails?.let {
            val matrixErrorAdapter = MoshiProvider.providesMoshi().adapter(MatrixError::class.java)
@ -241,54 +244,54 @@ data class Event(
 fun Event.isTextMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_TEXT,
-        MessageType.MSGTYPE_EMOTE,
-        MessageType.MSGTYPE_NOTICE -> true
-        else                       -> false
-    }
+                MessageType.MSGTYPE_TEXT,
+                MessageType.MSGTYPE_EMOTE,
+                MessageType.MSGTYPE_NOTICE -> true
+                else                       -> false
+            }
 }

 fun Event.isImageMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_IMAGE -> true
-        else                      -> false
-    }
+                MessageType.MSGTYPE_IMAGE -> true
+                else                      -> false
+            }
 }

 fun Event.isVideoMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_VIDEO -> true
-        else                      -> false
-    }
+                MessageType.MSGTYPE_VIDEO -> true
+                else                      -> false
+            }
 }

 fun Event.isAudioMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_AUDIO -> true
-        else                      -> false
-    }
+                MessageType.MSGTYPE_AUDIO -> true
+                else                      -> false
+            }
 }

 fun Event.isFileMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_FILE -> true
-        else                     -> false
-    }
+                MessageType.MSGTYPE_FILE -> true
+                else                     -> false
+            }
 }

 fun Event.isAttachmentMessage(): Boolean {
    return getClearType() == EventType.MESSAGE &&
            when (getClearContent()?.get(MessageContent.MSG_TYPE_JSON_KEY)) {
-        MessageType.MSGTYPE_IMAGE,
-        MessageType.MSGTYPE_AUDIO,
-        MessageType.MSGTYPE_VIDEO,
-        MessageType.MSGTYPE_FILE -> true
-        else                     -> false
-    }
+                MessageType.MSGTYPE_IMAGE,
+                MessageType.MSGTYPE_AUDIO,
+                MessageType.MSGTYPE_VIDEO,
+                MessageType.MSGTYPE_FILE -> true
+                else                     -> false
+            }
 }

 fun Event.getRelationContent(): RelationDefaultContent? {
@ -299,12 +302,22 @@ fun Event.getRelationContent(): RelationDefaultContent? {
    }
 }

+/**
+ * Returns the relation content for a specific type or null otherwise
+ */
+fun Event.getRelationContentForType(type: String): RelationDefaultContent? =
+        getRelationContent()?.takeIf { it.type == type }
+
 fun Event.isReply(): Boolean {
    return getRelationContent()?.inReplyTo?.eventId != null
 }

+fun Event.isThread(): Boolean = getRelationContentForType(RelationType.THREAD)?.eventId != null
+
+fun Event.getRootThreadEventId(): String? = getRelationContentForType(RelationType.THREAD)?.eventId
+
 fun Event.isEdition(): Boolean {
-    return getRelationContent()?.takeIf { it.type == RelationType.REPLACE }?.eventId != null
+    return getRelationContentForType(RelationType.REPLACE)?.eventId != null
 }

 fun Event.getPresenceContent(): PresenceContent? {
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/RelationService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/RelationService.kt
@ -131,11 +131,11 @@ interface RelationService {
     * Creates a thread reply for an existing timeline event
     * The replyInThreadText can be a Spannable and contains special spans (MatrixItemSpan) that will be translated
     * by the sdk into pills.
-     * @param eventToReplyInThread the event referenced by the thread reply
+     * @param rootThreadEventId the root thread eventId
     * @param replyInThreadText the reply text
     * @param autoMarkdown If true, the SDK will generate a formatted HTML message from the body text if markdown syntax is present
     */
-    fun replyInThread(eventToReplyInThread: TimelineEvent,
+    fun replyInThread(rootThreadEventId: String,
                       replyInThreadText: CharSequence,
                       autoMarkdown: Boolean = false): Cancelable?
 }
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadContent.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadContent.kt
@ -1,28 +0,0 @@
-/*
- * Copyright 2021 The Matrix.org Foundation C.I.C.
- *
- * 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 org.matrix.android.sdk.api.session.room.model.relation.threads
-
-interface ThreadContent {
-
-    companion object {
-        const val MSG_TYPE_JSON_KEY = "msgtype"
-    }
-
-    val msgType: String
-    val body: String
-    val relatesTo: ThreadRelatesTo?
-}
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadRelatesTo.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadRelatesTo.kt
@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2021 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 org.matrix.android.sdk.api.session.room.model.relation.threads
-
-import com.squareup.moshi.Json
-import com.squareup.moshi.JsonClass
-import org.matrix.android.sdk.api.session.events.model.RelationType
-import org.matrix.android.sdk.api.session.room.model.relation.RelationContent
-import org.matrix.android.sdk.api.session.room.model.relation.ReplyToContent
-
-@JsonClass(generateAdapter = true)
-data class ThreadRelatesTo(
-        @Json(name = "rel_type") override val type: String? = RelationType.THREAD,
-        @Json(name = "event_id") override val eventId: String,
-        @Json(name = "m.in_reply_to") override val inReplyTo: ReplyToContent? = null,
-        @Json(name = "option") override val option: Int? = null
-) : RelationContent
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadTextContent.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/threads/ThreadTextContent.kt
@ -1,28 +0,0 @@
-/*
- * Copyright 2021 The Matrix.org Foundation C.I.C.
- *
- * 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 org.matrix.android.sdk.api.session.room.model.relation.threads
-
-import com.squareup.moshi.Json
-import com.squareup.moshi.JsonClass
-import org.matrix.android.sdk.api.session.room.model.message.MessageContent
-
-@JsonClass(generateAdapter = true)
-data class ThreadTextContent(
-        @Json(name = MessageContent.MSG_TYPE_JSON_KEY) override val msgType: String,
-        @Json(name = "body") override val body: String,
-        @Json(name = "m.relates_to") override val relatesTo: ThreadRelatesTo? = null,
-) : ThreadContent
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmSessionStoreMigration.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmSessionStoreMigration.kt
@ -25,6 +25,7 @@ import org.matrix.android.sdk.api.session.room.model.RoomJoinRulesContent
 import org.matrix.android.sdk.api.session.room.model.VersioningState
 import org.matrix.android.sdk.api.session.room.model.create.RoomCreateContent
 import org.matrix.android.sdk.api.session.room.model.tag.RoomTag
+import org.matrix.android.sdk.internal.database.model.ChunkEntityFields
 import org.matrix.android.sdk.internal.database.model.CurrentStateEventEntityFields
 import org.matrix.android.sdk.internal.database.model.EditAggregatedSummaryEntityFields
 import org.matrix.android.sdk.internal.database.model.EditionOfEventFields
@ -49,7 +50,7 @@ import timber.log.Timber

 internal object RealmSessionStoreMigration : RealmMigration {

-    const val SESSION_STORE_SCHEMA_VERSION = 18L
+    const val SESSION_STORE_SCHEMA_VERSION = 19L

    override fun migrate(realm: DynamicRealm, oldVersion: Long, newVersion: Long) {
        Timber.v("Migrating Realm Session from $oldVersion to $newVersion")
@ -72,6 +73,7 @@ internal object RealmSessionStoreMigration : RealmMigration {
        if (oldVersion <= 15) migrateTo16(realm)
        if (oldVersion <= 16) migrateTo17(realm)
        if (oldVersion <= 17) migrateTo18(realm)
+        if (oldVersion <= 18) migrateTo19(realm)
    }

    private fun migrateTo1(realm: DynamicRealm) {
@ -364,4 +366,13 @@ internal object RealmSessionStoreMigration : RealmMigration {
        realm.schema.get("RoomMemberSummaryEntity")
                ?.addRealmObjectField(RoomMemberSummaryEntityFields.USER_PRESENCE_ENTITY.`$`, userPresenceEntity)
    }
+
+    private fun migrateTo19(realm: DynamicRealm) {
+        Timber.d("Step 18 -> 19")
+        realm.schema.get("EventEntity")
+                ?.addField(EventEntityFields.IS_THREAD, Boolean::class.java, FieldAttribute.INDEXED)
+                ?.addField(EventEntityFields.ROOT_THREAD_EVENT_ID, String::class.java)
+        realm.schema.get("ChunkEntity")
+                ?.addField(ChunkEntityFields.ROOT_THREAD_EVENT_ID, String::class.java, FieldAttribute.INDEXED)
+    }
 }
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/EventMapper.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/EventMapper.kt
@ -21,6 +21,8 @@ import org.matrix.android.sdk.api.session.crypto.MXCryptoError
 import org.matrix.android.sdk.api.session.events.model.Event
 import org.matrix.android.sdk.api.session.events.model.EventType
 import org.matrix.android.sdk.api.session.events.model.UnsignedData
+import org.matrix.android.sdk.api.session.events.model.getRootThreadEventId
+import org.matrix.android.sdk.api.session.events.model.isThread
 import org.matrix.android.sdk.api.session.room.send.SendState
 import org.matrix.android.sdk.internal.crypto.algorithms.olm.OlmDecryptionResult
 import org.matrix.android.sdk.internal.database.model.EventEntity
@ -39,6 +41,8 @@ internal object EventMapper {
        eventEntity.isUseless = IsUselessResolver.isUseless(event)
        eventEntity.stateKey = event.stateKey
        eventEntity.type = event.type ?: EventType.MISSING_TYPE
+        eventEntity.isThread = if(event.isRootThread) true else event.isThread()
+        eventEntity.rootThreadEventId = if(event.isRootThread) null else event.getRootThreadEventId()
        eventEntity.sender = event.senderId
        eventEntity.originServerTs = event.originServerTs
        eventEntity.redacts = event.redacts
@ -93,6 +97,7 @@ internal object EventMapper {
                MXCryptoError.ErrorType.valueOf(errorCode)
            }
            it.mCryptoErrorReason = eventEntity.decryptionErrorReason
+            it.isRootThread = eventEntity.isRootThread()
        }
    }
 }
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/ChunkEntity.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/ChunkEntity.kt
@ -27,6 +27,7 @@ import org.matrix.android.sdk.internal.extensions.clearWith
 internal open class ChunkEntity(@Index var prevToken: String? = null,
        // Because of gaps we can have several chunks with nextToken == null
                                @Index var nextToken: String? = null,
+                                @Index var rootThreadEventId: String? = null,
                                var stateEvents: RealmList<EventEntity> = RealmList(),
                                var timelineEvents: RealmList<TimelineEventEntity> = RealmList(),
                                var numberOfTimelineEvents: Long = 0,
@ -44,6 +45,8 @@ internal open class ChunkEntity(@Index var prevToken: String? = null,
    val room: RealmResults<RoomEntity>? = null

    companion object
+
+    fun isThreadChunk() = rootThreadEventId != null
 }

 internal fun ChunkEntity.deleteOnCascade(deleteStateEvents: Boolean, canDeleteRoot: Boolean) {
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/EventEntity.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/EventEntity.kt
@ -27,13 +27,15 @@ import org.matrix.android.sdk.internal.extensions.assertIsManaged
 internal open class EventEntity(@Index var eventId: String = "",
                                @Index var roomId: String = "",
                                @Index var type: String = "",
+                                @Index var isThread: Boolean = false,
+                                var rootThreadEventId: String? = null,
                                var content: String? = null,
                                var prevContent: String? = null,
                                var isUseless: Boolean = false,
                                @Index var stateKey: String? = null,
                                var originServerTs: Long? = null,
                                @Index var sender: String? = null,
-                                // Can contain a serialized MatrixError
+        // Can contain a serialized MatrixError
                                var sendStateDetails: String? = null,
                                var age: Long? = 0,
                                var unsignedData: String? = null,
@ -75,4 +77,10 @@ internal open class EventEntity(@Index var eventId: String = "",
                .findFirst()
                ?.canBeProcessed = true
    }
+
+    /**
+     * Returns true if the current event is a thread root event
+     */
+    fun isRootThread(): Boolean = isThread && rootThreadEventId == null
+
 }
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/query/ChunkEntityQueries.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/query/ChunkEntityQueries.kt
@ -33,9 +33,11 @@ internal fun ChunkEntity.Companion.find(realm: Realm, roomId: String, prevToken:
    val query = where(realm, roomId)
    if (prevToken != null) {
        query.equalTo(ChunkEntityFields.PREV_TOKEN, prevToken)
+        query.isNull(ChunkEntityFields.ROOT_THREAD_EVENT_ID)
    }
    if (nextToken != null) {
        query.equalTo(ChunkEntityFields.NEXT_TOKEN, nextToken)
+        query.isNull(ChunkEntityFields.ROOT_THREAD_EVENT_ID)
    }
    return query.findFirst()
 }
@ -43,12 +45,15 @@ internal fun ChunkEntity.Companion.find(realm: Realm, roomId: String, prevToken:
 internal fun ChunkEntity.Companion.findLastForwardChunkOfRoom(realm: Realm, roomId: String): ChunkEntity? {
    return where(realm, roomId)
            .equalTo(ChunkEntityFields.IS_LAST_FORWARD, true)
+            .isNull(ChunkEntityFields.ROOT_THREAD_EVENT_ID)
            .findFirst()
 }

+
 internal fun ChunkEntity.Companion.findAllIncludingEvents(realm: Realm, eventIds: List<String>): RealmResults<ChunkEntity> {
    return realm.where<ChunkEntity>()
            .`in`(ChunkEntityFields.TIMELINE_EVENTS.EVENT_ID, eventIds.toTypedArray())
+            .isNull(ChunkEntityFields.ROOT_THREAD_EVENT_ID)
            .findAll()
 }

@ -56,6 +61,7 @@ internal fun ChunkEntity.Companion.findIncludingEvent(realm: Realm, eventId: Str
    return findAllIncludingEvents(realm, listOf(eventId)).firstOrNull()
 }

+
 internal fun ChunkEntity.Companion.create(
        realm: Realm,
        prevToken: String?,
@ -66,3 +72,16 @@ internal fun ChunkEntity.Companion.create(
        this.nextToken = nextToken
    }
 }
+
+// Threads
+internal fun ChunkEntity.Companion.findThreadChunkOfRoom(realm: Realm, roomId: String, rootThreadEventId: String): ChunkEntity? {
+    return where(realm, roomId)
+            .equalTo(ChunkEntityFields.ROOT_THREAD_EVENT_ID, rootThreadEventId)
+            .findFirst()
+}
+
+internal fun ChunkEntity.Companion.findAllThreadChunkOfRoom(realm: Realm, roomId: String): RealmResults<ChunkEntity> {
+    return where(realm, roomId)
+            .isNotNull(ChunkEntityFields.ROOT_THREAD_EVENT_ID)
+            .findAll()
+}
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt
@ -159,11 +159,15 @@ internal class DefaultRelationService @AssistedInject constructor(
        }
    }

-    override fun replyInThread(eventToReplyInThread: TimelineEvent, replyInThreadText: CharSequence, autoMarkdown: Boolean): Cancelable? {
-        val event = eventFactory.createThreadTextEvent(eventToReplyInThread, TextContent(replyInThreadText.toString()))
-                .also {
-                    saveLocalEcho(it)
-                }
+    override fun replyInThread(rootThreadEventId: String, replyInThreadText: CharSequence, autoMarkdown: Boolean): Cancelable {
+        val event = eventFactory.createThreadTextEvent(
+                rootThreadEventId = rootThreadEventId,
+                roomId = roomId,
+                text = replyInThreadText.toString(),
+                autoMarkdown = autoMarkdown)
+//                .also {
+//                    saveLocalEcho(it)
+//                }
        return eventSenderProcessor.postEvent(event, cryptoSessionInfoProvider.isRoomEncrypted(roomId))
    }

--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt
@ -51,8 +51,6 @@ import org.matrix.android.sdk.api.session.room.model.relation.ReactionContent
 import org.matrix.android.sdk.api.session.room.model.relation.ReactionInfo
 import org.matrix.android.sdk.api.session.room.model.relation.RelationDefaultContent
 import org.matrix.android.sdk.api.session.room.model.relation.ReplyToContent
-import org.matrix.android.sdk.api.session.room.model.relation.threads.ThreadTextContent
-import org.matrix.android.sdk.api.session.room.model.relation.threads.ThreadRelatesTo
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
 import org.matrix.android.sdk.api.session.room.timeline.getLastMessageContent
 import org.matrix.android.sdk.api.session.room.timeline.isReply
@ -60,7 +58,6 @@ import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.content.ThumbnailExtractor
 import org.matrix.android.sdk.internal.session.permalinks.PermalinkFactory
 import org.matrix.android.sdk.internal.session.room.send.pills.TextPillsUtils
-import timber.log.Timber
 import javax.inject.Inject

 /**
@ -346,11 +343,13 @@ internal class LocalEchoEventFactory @Inject constructor(
    /**
     * Creates a thread event related to the already existing event
     */
-    fun createThreadTextEvent(eventToReplyInThread: TimelineEvent, textContent: TextContent): Event =
+    fun createThreadTextEvent(rootThreadEventId: String, roomId:String, text: String, autoMarkdown: Boolean): Event =
            createEvent(
-                    eventToReplyInThread.roomId,
+                    roomId,
                    EventType.MESSAGE,
-                    textContent.toThreadTextContent(eventToReplyInThread).toContent())
+                    createTextContent(text, autoMarkdown)
+                            .toThreadTextContent(rootThreadEventId)
+                            .toContent())

    private fun dummyOriginServerTs(): Long {
        return System.currentTimeMillis()
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/TextContent.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/TextContent.kt
@ -16,13 +16,11 @@

 package org.matrix.android.sdk.internal.session.room.send

-import org.matrix.android.sdk.api.session.events.model.toContent
+import org.matrix.android.sdk.api.session.events.model.RelationType
 import org.matrix.android.sdk.api.session.room.model.message.MessageFormat
 import org.matrix.android.sdk.api.session.room.model.message.MessageTextContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageType
-import org.matrix.android.sdk.api.session.room.model.relation.threads.ThreadTextContent
-import org.matrix.android.sdk.api.session.room.model.relation.threads.ThreadRelatesTo
-import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
+import org.matrix.android.sdk.api.session.room.model.relation.RelationDefaultContent
 import org.matrix.android.sdk.api.util.ContentUtils.extractUsefulTextFromHtmlReply
 import org.matrix.android.sdk.api.util.ContentUtils.extractUsefulTextFromReply

@ -45,11 +43,13 @@ fun TextContent.toMessageTextContent(msgType: String = MessageType.MSGTYPE_TEXT)
    )
 }

-fun TextContent.toThreadTextContent(eventToReplyInThread: TimelineEvent, msgType: String = MessageType.MSGTYPE_TEXT): ThreadTextContent {
-    return ThreadTextContent(
+fun TextContent.toThreadTextContent(rootThreadEventId: String, msgType: String = MessageType.MSGTYPE_TEXT): MessageTextContent {
+    return MessageTextContent(
            msgType = msgType,
+            format = MessageFormat.FORMAT_MATRIX_HTML.takeIf { formattedText != null },
            body = text,
-            relatesTo = ThreadRelatesTo(eventId = eventToReplyInThread.eventId)
+            relatesTo = RelationDefaultContent(RelationType.THREAD, rootThreadEventId),
+            formattedBody = formattedText
    )
 }

--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/TokenChunkEventPersistor.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/TokenChunkEventPersistor.kt
@ -18,7 +18,9 @@ package org.matrix.android.sdk.internal.session.room.timeline

 import com.zhuinden.monarchy.Monarchy
 import io.realm.Realm
+import io.realm.kotlin.createObject
 import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.isThread
 import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.room.model.RoomMemberContent
 import org.matrix.android.sdk.api.session.room.send.SendState
@ -28,6 +30,8 @@ import org.matrix.android.sdk.internal.database.helper.addTimelineEvent
 import org.matrix.android.sdk.internal.database.helper.merge
 import org.matrix.android.sdk.internal.database.mapper.toEntity
 import org.matrix.android.sdk.internal.database.model.ChunkEntity
+import org.matrix.android.sdk.internal.database.model.EventEntity
+import org.matrix.android.sdk.internal.database.model.EventEntityFields
 import org.matrix.android.sdk.internal.database.model.EventInsertType
 import org.matrix.android.sdk.internal.database.model.RoomEntity
 import org.matrix.android.sdk.internal.database.model.RoomSummaryEntity
@ -37,6 +41,7 @@ import org.matrix.android.sdk.internal.database.query.create
 import org.matrix.android.sdk.internal.database.query.find
 import org.matrix.android.sdk.internal.database.query.findAllIncludingEvents
 import org.matrix.android.sdk.internal.database.query.findLastForwardChunkOfRoom
+import org.matrix.android.sdk.internal.database.query.findThreadChunkOfRoom
 import org.matrix.android.sdk.internal.database.query.getOrCreate
 import org.matrix.android.sdk.internal.database.query.where
 import org.matrix.android.sdk.internal.di.SessionDatabase
@ -221,7 +226,15 @@ internal class TokenChunkEventPersistor @Inject constructor(@SessionDatabase pri
                roomMemberContentsByUser[event.stateKey] = contentToUse.toModel<RoomMemberContent>()
            }

-            currentChunk.addTimelineEvent(roomId, eventEntity, direction, roomMemberContentsByUser)
+            Timber.i("------> [TokenChunkEventPersistor] Add TimelineEvent to chunkEntity event[${event.eventId}] ${if (event.isThread()) "is Thread" else ""}")
+
+            addTimelineEventToChunk(
+                    realm = realm,
+                    roomId = roomId,
+                    eventEntity = eventEntity,
+                    currentChunk = currentChunk,
+                    direction = direction,
+                    roomMemberContentsByUser = roomMemberContentsByUser)
        }
        // Find all the chunks which contain at least one event from the list of eventIds
        val chunks = ChunkEntity.findAllIncludingEvents(realm, eventIds)
@ -247,4 +260,43 @@ internal class TokenChunkEventPersistor @Inject constructor(@SessionDatabase pri
            RoomEntity.where(realm, roomId).findFirst()?.addIfNecessary(currentChunk)
        }
    }
+
+    /**
+     * Adds a timeline event to the correct chunk. If there is a thread detected will be added
+     * to a specific chunk
+     */
+    private fun addTimelineEventToChunk(realm: Realm,
+                                        roomId: String,
+                                        eventEntity: EventEntity,
+                                        currentChunk: ChunkEntity,
+                                        direction: PaginationDirection,
+                                        roomMemberContentsByUser: Map<String, RoomMemberContent?>) {
+        val rootThreadEventId = eventEntity.rootThreadEventId
+        if (eventEntity.isThread && rootThreadEventId != null) {
+            val threadChunk = getOrCreateThreadChunk(realm, roomId, rootThreadEventId)
+            threadChunk.addTimelineEvent(roomId, eventEntity, direction, roomMemberContentsByUser)
+            markEventAsRootEvent(realm, rootThreadEventId)
+            if (threadChunk.isValid)
+                RoomEntity.where(realm, roomId).findFirst()?.addIfNecessary(threadChunk)
+        } else {
+            currentChunk.addTimelineEvent(roomId, eventEntity, direction, roomMemberContentsByUser)
+        }
+    }
+
+    private fun markEventAsRootEvent(realm: Realm, rootThreadEventId: String) {
+        val rootThreadEvent = EventEntity
+                .where(realm, rootThreadEventId)
+                .equalTo(EventEntityFields.IS_THREAD, false).findFirst() ?: return
+        rootThreadEvent.isThread = true
+    }
+
+    /**
+     * Returns the chunk for the current room if exists, otherwise it creates a new ChunkEntity
+     */
+    private fun getOrCreateThreadChunk(realm: Realm, roomId: String, rootThreadEventId: String): ChunkEntity {
+        return ChunkEntity.findThreadChunkOfRoom(realm, roomId, rootThreadEventId)
+                ?: realm.createObject<ChunkEntity>().apply {
+                    this.rootThreadEventId = rootThreadEventId
+                }
+    }
 }
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/RoomSyncHandler.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/RoomSyncHandler.kt
@ -21,31 +21,41 @@ import io.realm.kotlin.createObject
 import org.matrix.android.sdk.api.session.crypto.MXCryptoError
 import org.matrix.android.sdk.api.session.events.model.Event
 import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.isThread
 import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.initsync.InitSyncStep
 import org.matrix.android.sdk.api.session.room.model.Membership
 import org.matrix.android.sdk.api.session.room.model.RoomMemberContent
+import org.matrix.android.sdk.api.session.room.model.message.MessageRelationContent
 import org.matrix.android.sdk.api.session.room.send.SendState
 import org.matrix.android.sdk.api.session.sync.model.InvitedRoomSync
 import org.matrix.android.sdk.api.session.sync.model.LazyRoomSyncEphemeral
 import org.matrix.android.sdk.api.session.sync.model.RoomSync
 import org.matrix.android.sdk.api.session.sync.model.RoomsSyncResponse
+import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.internal.crypto.CryptoSessionInfoProvider
 import org.matrix.android.sdk.internal.crypto.DefaultCryptoService
 import org.matrix.android.sdk.internal.crypto.MXCRYPTO_ALGORITHM_MEGOLM
 import org.matrix.android.sdk.internal.crypto.algorithms.olm.OlmDecryptionResult
 import org.matrix.android.sdk.internal.database.helper.addIfNecessary
 import org.matrix.android.sdk.internal.database.helper.addTimelineEvent
+import org.matrix.android.sdk.internal.database.mapper.EventMapper
 import org.matrix.android.sdk.internal.database.mapper.asDomain
 import org.matrix.android.sdk.internal.database.mapper.toEntity
 import org.matrix.android.sdk.internal.database.model.ChunkEntity
 import org.matrix.android.sdk.internal.database.model.CurrentStateEventEntity
+import org.matrix.android.sdk.internal.database.model.EventEntity
+import org.matrix.android.sdk.internal.database.model.EventEntityFields
 import org.matrix.android.sdk.internal.database.model.EventInsertType
 import org.matrix.android.sdk.internal.database.model.RoomEntity
 import org.matrix.android.sdk.internal.database.model.RoomMemberSummaryEntity
+import org.matrix.android.sdk.internal.database.model.TimelineEventEntity
 import org.matrix.android.sdk.internal.database.model.deleteOnCascade
 import org.matrix.android.sdk.internal.database.query.copyToRealmOrIgnore
 import org.matrix.android.sdk.internal.database.query.find
+import org.matrix.android.sdk.internal.database.query.findAllThreadChunkOfRoom
 import org.matrix.android.sdk.internal.database.query.findLastForwardChunkOfRoom
+import org.matrix.android.sdk.internal.database.query.findThreadChunkOfRoom
 import org.matrix.android.sdk.internal.database.query.getOrCreate
 import org.matrix.android.sdk.internal.database.query.getOrNull
 import org.matrix.android.sdk.internal.database.query.where
@ -58,8 +68,11 @@ import org.matrix.android.sdk.internal.session.initsync.mapWithProgress
 import org.matrix.android.sdk.internal.session.initsync.reportSubtask
 import org.matrix.android.sdk.internal.session.room.membership.RoomChangeMembershipStateDataSource
 import org.matrix.android.sdk.internal.session.room.membership.RoomMemberEventHandler
+import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
+import org.matrix.android.sdk.internal.session.room.send.queue.EventSenderProcessor
 import org.matrix.android.sdk.internal.session.room.summary.RoomSummaryUpdater
 import org.matrix.android.sdk.internal.session.room.timeline.PaginationDirection
+import org.matrix.android.sdk.internal.session.room.timeline.TimelineEventDecryptor
 import org.matrix.android.sdk.internal.session.room.timeline.TimelineInput
 import org.matrix.android.sdk.internal.session.room.typing.TypingEventContent
 import org.matrix.android.sdk.internal.session.sync.InitialSyncStrategy
@ -356,6 +369,21 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
        val eventIds = ArrayList<String>(eventList.size)
        val roomMemberContentsByUser = HashMap<String, RoomMemberContent?>()

+/////////////////////
+        // There is only one chunk per room
+
+        val threadChunks = ChunkEntity.findAllThreadChunkOfRoom(realm, roomId)
+
+        val tc = threadChunks.joinToString { chunk ->
+            var output = "\n----------------\n------> [${chunk.timelineEvents.size}] rootThreadEventId = ${chunk.rootThreadEventId}" + "\n"
+            output += chunk.timelineEvents
+                    .joinToString("") {
+                        "------>          " + "eventId:[${it?.eventId}] payload:[${getValueFromPayload(it.root?.let { root -> EventMapper.map(root).mxDecryptionResult }?.payload, "body")}]\n"
+            }
+            output
+        }
+        Timber.i("------> Chunks (${threadChunks.size})$tc")
+/////////////////////
        for (event in eventList) {
            if (event.eventId == null || event.senderId == null || event.type == null) {
                continue
@ -385,7 +413,16 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
                rootStateEvent?.asDomain()?.getFixedRoomMemberContent()
            }

-            chunkEntity.addTimelineEvent(roomId, eventEntity, PaginationDirection.FORWARDS, roomMemberContentsByUser)
+            Timber.i("------> [RoomSyncHandler] Add TimelineEvent to chunkEntity event[${event.eventId}] ${if (event.isThread()) "is Thread" else ""}")
+
+            addTimelineEventToChunk(
+                    realm = realm,
+                    roomId = roomId,
+                    eventEntity = eventEntity,
+                    chunkEntity = chunkEntity,
+                    roomEntity = roomEntity,
+                    roomMemberContentsByUser = roomMemberContentsByUser)
+
            // Give info to crypto module
            cryptoService.onLiveEvent(roomEntity.roomId, event)

@ -412,9 +449,54 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
        }
        // posting new events to timeline if any is registered
        timelineInput.onNewTimelineEvents(roomId = roomId, eventIds = eventIds)
+
        return chunkEntity
    }

+    /**
+     * Adds a timeline event to the correct chunk. If there is a thread detected will be added
+     * to a specific chunk
+     */
+    private fun addTimelineEventToChunk(realm: Realm,
+                                        roomId: String,
+                                        eventEntity: EventEntity,
+                                        chunkEntity: ChunkEntity,
+                                        roomEntity: RoomEntity,
+                                        roomMemberContentsByUser: Map<String, RoomMemberContent?>) {
+        val rootThreadEventId = eventEntity.rootThreadEventId
+        if (eventEntity.isThread && rootThreadEventId != null) {
+            val threadChunk = getOrCreateThreadChunk(realm, roomId, rootThreadEventId)
+            threadChunk.addTimelineEvent(roomId, eventEntity, PaginationDirection.FORWARDS, roomMemberContentsByUser)
+            markEventAsRootEvent(realm, rootThreadEventId)
+            roomEntity.addIfNecessary(threadChunk)
+        } else {
+            chunkEntity.addTimelineEvent(roomId, eventEntity, PaginationDirection.FORWARDS, roomMemberContentsByUser)
+        }
+    }
+
+    @Suppress("UNCHECKED_CAST")
+    private fun getValueFromPayload(payload: JsonDict?, key: String): String? {
+        val content = payload?.get("content") as? JsonDict
+        return content?.get(key) as? String
+    }
+
+    /**
+     * Returns the chunk for the current room if exists, otherwise it creates a new ChunkEntity
+     */
+    private fun getOrCreateThreadChunk(realm: Realm, roomId: String, rootThreadEventId: String): ChunkEntity {
+        return ChunkEntity.findThreadChunkOfRoom(realm, roomId, rootThreadEventId)
+                ?: realm.createObject<ChunkEntity>().apply {
+                    this.rootThreadEventId = rootThreadEventId
+                }
+    }
+
+    private fun markEventAsRootEvent(realm: Realm, rootThreadEventId: String){
+        val rootThreadEvent = EventEntity
+                .where(realm, rootThreadEventId)
+                .equalTo(EventEntityFields.IS_THREAD, false).findFirst() ?: return
+        rootThreadEvent.isThread = true
+    }
+
    private fun decryptIfNeeded(event: Event, roomId: String) {
        try {
            // Event from sync does not have roomId, so add it to the event first
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
@ -49,6 +49,7 @@ import androidx.core.text.toSpannable
 import androidx.core.util.Pair
 import androidx.core.view.ViewCompat
 import androidx.core.view.forEach
+import androidx.core.view.isGone
 import androidx.core.view.isInvisible
 import androidx.core.view.isVisible
 import androidx.fragment.app.setFragmentResultListener
@ -228,7 +229,8 @@ data class RoomDetailArgs(
        val roomId: String,
        val eventId: String? = null,
        val sharedData: SharedData? = null,
-        val openShareSpaceForId: String? = null
+        val openShareSpaceForId: String? = null,
+        val roomThreadDetailArgs: RoomThreadDetailArgs? = null
 ) : Parcelable

 class RoomDetailFragment @Inject constructor(
@ -352,7 +354,12 @@ class RoomDetailFragment @Inject constructor(
        )
        keyboardStateUtils = KeyboardStateUtils(requireActivity())
        lazyLoadedViews.bind(views)
-        setupToolbar(views.roomToolbar)
+        if (isThreadTimeLine()) {
+            views.roomToolbar.isGone = true
+        } else {
+            setupToolbar(views.roomToolbar)
+        }
+        setupThreadIfNeeded()
        setupRecyclerView()
        setupComposer()
        setupNotificationView()
@ -390,10 +397,10 @@ class RoomDetailFragment @Inject constructor(
                return@onEach
            }
            when (mode) {
-                is SendMode.REGULAR -> renderRegularMode(mode.text)
-                is SendMode.EDIT    -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_edit, R.string.edit, mode.text)
-                is SendMode.QUOTE   -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_quote, R.string.quote, mode.text)
-                is SendMode.REPLY   -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_reply, R.string.reply, mode.text)
+                is SendMode.REGULAR         -> renderRegularMode(mode.text)
+                is SendMode.EDIT            -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_edit, R.string.edit, mode.text)
+                is SendMode.QUOTE           -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_quote, R.string.quote, mode.text)
+                is SendMode.REPLY           -> renderSpecialMode(mode.timelineEvent, R.drawable.ic_reply, R.string.reply, mode.text)
            }
        }

@ -902,6 +909,7 @@ class RoomDetailFragment @Inject constructor(

    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        super.onCreateOptionsMenu(menu, inflater)
+        if (isThreadTimeLine()) return
        // We use a custom layout for this menu item, so we need to set a ClickListener
        menu.findItem(R.id.open_matrix_apps)?.let { menuItem ->
            menuItem.actionView.setOnClickListener {
@ -915,6 +923,12 @@ class RoomDetailFragment @Inject constructor(
    }

    override fun onPrepareOptionsMenu(menu: Menu) {
+        if (isThreadTimeLine()) {
+            menu.forEach {
+                it.isVisible = false
+            }
+            return
+        }
        menu.forEach {
            it.isVisible = roomDetailViewModel.isMenuItemVisible(it.itemId)
        }
@ -1180,6 +1194,12 @@ class RoomDetailFragment @Inject constructor(

 // PRIVATE METHODS *****************************************************************************

+    private fun setupThreadIfNeeded(){
+        getRootThreadEventId()?.let{
+            textComposerViewModel.handle(TextComposerAction.EnterReplyInThreadTimeline(it))
+        }
+    }
+
    private fun setupRecyclerView() {
        timelineEventController.callback = this
        timelineEventController.timeline = roomDetailViewModel.timeline
@ -2203,4 +2223,7 @@ class RoomDetailFragment @Inject constructor(
            }
        }
    }
+
+    fun isThreadTimeLine(): Boolean = roomDetailArgs.roomThreadDetailArgs != null
+    fun getRootThreadEventId(): String? = roomDetailArgs.roomThreadDetailArgs?.eventId
 }
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewState.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewState.kt
@ -65,8 +65,9 @@ data class RoomDetailViewState(
        val isAllowedToManageWidgets: Boolean = false,
        val isAllowedToStartWebRTCCall: Boolean = true,
        val hasFailedSending: Boolean = false,
-        val jitsiState: JitsiState = JitsiState()
-) : MavericksState {
+        val jitsiState: JitsiState = JitsiState(),
+        val rootThreadEventId: String? = null
+        ) : MavericksState {

    constructor(args: RoomDetailArgs) : this(
            roomId = args.roomId,
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerAction.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerAction.kt
@ -28,4 +28,6 @@ sealed class TextComposerAction : VectorViewModelAction {
    data class UserIsTyping(val isTyping: Boolean) : TextComposerAction()
    data class OnTextChanged(val text: CharSequence) : TextComposerAction()
    data class OnVoiceRecordingStateChanged(val isRecording: Boolean) : TextComposerAction()
+    data class EnterReplyInThreadTimeline(val rootThreadEventId: String) : TextComposerAction()
+
 }
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerViewModel.kt
@ -42,6 +42,7 @@ import org.commonmark.renderer.html.HtmlRenderer
 import org.matrix.android.sdk.api.query.QueryStringValue
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.getRootThreadEventId
 import org.matrix.android.sdk.api.session.events.model.toContent
 import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.room.model.PowerLevelsContent
@ -88,6 +89,8 @@ class TextComposerViewModel @AssistedInject constructor(
            is TextComposerAction.UserIsTyping                 -> handleUserIsTyping(action)
            is TextComposerAction.OnTextChanged                -> handleOnTextChanged(action)
            is TextComposerAction.OnVoiceRecordingStateChanged -> handleOnVoiceRecordingStateChanged(action)
+            is TextComposerAction.EnterReplyInThreadTimeline   -> handleEnterReplyInThreadTimeline(action)
+
        }
    }

@ -95,6 +98,10 @@ class TextComposerViewModel @AssistedInject constructor(
        copy(isVoiceRecording = action.isRecording)
    }

+    private fun handleEnterReplyInThreadTimeline(action: TextComposerAction.EnterReplyInThreadTimeline) = setState {
+        copy(rootThreadEventId = action.rootThreadEventId)
+    }
+
    private fun handleOnTextChanged(action: TextComposerAction.OnTextChanged) {
        setState {
            // Makes sure currentComposerText is upToDate when accessing further setState
@ -151,11 +158,15 @@ class TextComposerViewModel @AssistedInject constructor(
    private fun handleSendMessage(action: TextComposerAction.SendMessage) {
        withState { state ->
            when (state.sendMode) {
-                is SendMode.REGULAR -> {
+                is SendMode.REGULAR         -> {
                    when (val slashCommandResult = CommandParser.parseSplashCommand(action.text)) {
                        is ParsedCommand.ErrorNotACommand         -> {
                            // Send the text message to the room
-                            room.sendTextMessage(action.text, autoMarkdown = action.autoMarkdown)
+                            if (state.rootThreadEventId != null)
+                                room.replyInThread(state.rootThreadEventId, action.text.toString(), action.autoMarkdown)
+                            else
+                                room.sendTextMessage(action.text, autoMarkdown = action.autoMarkdown)
+
                            _viewEvents.post(TextComposerViewEvents.MessageSent)
                            popDraft()
                        }
@ -386,7 +397,7 @@ class TextComposerViewModel @AssistedInject constructor(
                        }
                    }.exhaustive
                }
-                is SendMode.EDIT    -> {
+                is SendMode.EDIT            -> {
                    // is original event a reply?
                    val inReplyTo = state.sendMode.timelineEvent.getRelationContent()?.inReplyTo?.eventId
                    if (inReplyTo != null) {
@ -409,7 +420,7 @@ class TextComposerViewModel @AssistedInject constructor(
                    _viewEvents.post(TextComposerViewEvents.MessageSent)
                    popDraft()
                }
-                is SendMode.QUOTE   -> {
+                is SendMode.QUOTE           -> {
                    val messageContent = state.sendMode.timelineEvent.getLastMessageContent()
                    val textMsg = messageContent?.body

@ -430,7 +441,7 @@ class TextComposerViewModel @AssistedInject constructor(
                    _viewEvents.post(TextComposerViewEvents.MessageSent)
                    popDraft()
                }
-                is SendMode.REPLY   -> {
+                is SendMode.REPLY           -> {
                    state.sendMode.timelineEvent.let {
                        room.replyToMessage(it, action.text.toString(), action.autoMarkdown)
                        _viewEvents.post(TextComposerViewEvents.MessageSent)
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerViewState.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerViewState.kt
@ -46,6 +46,7 @@ data class TextComposerViewState(
        val canSendMessage: Boolean = true,
        val isVoiceRecording: Boolean = false,
        val isSendButtonVisible: Boolean = false,
+        val rootThreadEventId: String? = null,
        val sendMode: SendMode = SendMode.REGULAR("", false)
 ) : MavericksState {

@ -53,4 +54,6 @@ data class TextComposerViewState(
        get() = canSendMessage && !isVoiceRecording

    constructor(args: RoomDetailArgs) : this(roomId = args.roomId)
+
+    fun isInThreadTimeline(): Boolean = rootThreadEventId != null
 }
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MessageItemFactory.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MessageItemFactory.kt
@ -149,7 +149,7 @@ class MessageItemFactory @Inject constructor(
            // This is an edit event, we should display it when debugging as a notice event
            return noticeItemFactory.create(params)
        }
-        val attributes = messageItemAttributesFactory.create(messageContent, informationData, callback)
+        val attributes = messageItemAttributesFactory.create(messageContent, informationData, callback, event.root.isRootThread)

 //        val all = event.root.toContent()
 //        val ev = all.toModel<Event>()
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/MessageItemAttributesFactory.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/MessageItemAttributesFactory.kt
@ -31,7 +31,8 @@ class MessageItemAttributesFactory @Inject constructor(

    fun create(messageContent: Any?,
               informationData: MessageInformationData,
-               callback: TimelineEventController.Callback?): AbsMessageItem.Attributes {
+               callback: TimelineEventController.Callback?,
+               isRootThread: Boolean = false): AbsMessageItem.Attributes {
        return AbsMessageItem.Attributes(
                avatarSize = avatarSizeProvider.avatarSize,
                informationData = informationData,
@ -49,7 +50,8 @@ class MessageItemAttributesFactory @Inject constructor(
                reactionPillCallback = callback,
                avatarCallback = callback,
                readReceiptsCallback = callback,
-                emojiTypeFace = emojiCompatFontProvider.typeface
+                emojiTypeFace = emojiCompatFontProvider.typeface,
+                isRootThread = isRootThread
        )
    }
 }
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/AbsMessageItem.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/AbsMessageItem.kt
@ -98,6 +98,7 @@ abstract class AbsMessageItem<H : AbsMessageItem.Holder> : AbsBaseMessageItem<H>
        // Render send state indicator
        holder.sendStateImageView.render(attributes.informationData.sendStateDecoration)
        holder.eventSendingIndicator.isVisible = attributes.informationData.sendStateDecoration == SendStateDecoration.SENDING_MEDIA
+        holder.isThread.isVisible = attributes.isRootThread
    }

    override fun unbind(holder: H) {
@ -117,6 +118,7 @@ abstract class AbsMessageItem<H : AbsMessageItem.Holder> : AbsBaseMessageItem<H>
        val timeView by bind<TextView>(R.id.messageTimeView)
        val sendStateImageView by bind<SendStateImageView>(R.id.messageSendStateImageView)
        val eventSendingIndicator by bind<ProgressBar>(R.id.eventSendingIndicator)
+        val isThread by bind<View>(R.id.messageIsThread)
    }

    /**
@ -133,7 +135,8 @@ abstract class AbsMessageItem<H : AbsMessageItem.Holder> : AbsBaseMessageItem<H>
            override val reactionPillCallback: TimelineEventController.ReactionPillCallback? = null,
            val avatarCallback: TimelineEventController.AvatarCallback? = null,
            override val readReceiptsCallback: TimelineEventController.ReadReceiptsCallback? = null,
-            val emojiTypeFace: Typeface? = null
+            val emojiTypeFace: Typeface? = null,
+            val isRootThread: Boolean = false
    ) : AbsBaseMessageItem.Attributes {

        // Have to override as it's used to diff epoxy items
--- a/vector/src/main/java/im/vector/app/features/home/room/threads/detail/RoomThreadDetailActivity.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/threads/detail/RoomThreadDetailActivity.kt
@ -25,6 +25,8 @@ import im.vector.app.core.extensions.replaceFragment
 import im.vector.app.core.platform.VectorBaseActivity
 import im.vector.app.databinding.ActivityRoomThreadDetailBinding
 import im.vector.app.features.home.AvatarRenderer
+import im.vector.app.features.home.room.detail.RoomDetailArgs
+import im.vector.app.features.home.room.detail.RoomDetailFragment
 import im.vector.app.features.home.room.threads.detail.arguments.RoomThreadDetailArgs
 import org.matrix.android.sdk.api.util.MatrixItem
 import javax.inject.Inject
@ -65,7 +67,16 @@ class RoomThreadDetailActivity : VectorBaseActivity<ActivityRoomThreadDetailBind

    private fun initFragment() {
        if (isFirstCreation()) {
-            replaceFragment(R.id.roomThreadDetailFragmentContainer, RoomThreadDetailFragment::class.java, getRoomThreadDetailArgs(), FRAGMENT_TAG)
+            getRoomThreadDetailArgs()?.let {
+                replaceFragment(
+                        R.id.roomThreadDetailFragmentContainer,
+                        RoomDetailFragment::class.java,
+                        RoomDetailArgs(
+                                roomId = it.roomId,
+                                roomThreadDetailArgs = it
+                        ))
+            }
+//            replaceFragment(R.id.roomThreadDetailFragmentContainer, RoomThreadDetailFragment::class.java, getRoomThreadDetailArgs(), FRAGMENT_TAG)
        }
    }

--- a/vector/src/main/java/im/vector/app/features/home/room/threads/detail/RoomThreadDetailFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/threads/detail/RoomThreadDetailFragment.kt
@ -47,7 +47,15 @@ class RoomThreadDetailFragment @Inject constructor(
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        initTextComposer()
-//        views.testTextVeiwddasda.text = "${roomThreadDetailArgs.eventId}  --  ${roomThreadDetailArgs.roomId}"
+//        lifecycleScope.launch(Dispatchers.IO) {
+//            Realm.getInstance(realmConfiguration).executeTransaction {
+//                val eventId = roomThreadDetailArgs.eventId ?: return@executeTransaction
+//                val r = EventEntity.where(it, eventId = eventId)
+//                        .findFirst() ?: return@executeTransaction
+//                Timber.i("------> $eventId isThread: ${EventMapper.map(r).isThread()}")
+//            }
+//        }
+////        views.testTextVeiwddasda.text = "${roomThreadDetailArgs.eventId}  --  ${roomThreadDetailArgs.roomId}"
    }

    private fun initTextComposer(){
--- a/vector/src/main/res/layout/item_timeline_event_base.xml
+++ b/vector/src/main/res/layout/item_timeline_event_base.xml
@ -200,4 +200,17 @@
        </com.google.android.flexbox.FlexboxLayout>
    </LinearLayout>

+    <View
+        android:id="@+id/messageIsThread"
+        android:layout_width="wrap_content"
+        android:background="#2653AE"
+        android:layout_height="2dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="20dp"
+        android:layout_marginBottom="4dp"
+        android:layout_below="@id/informationBottom"
+        android:layout_toStartOf="@id/messageSendStateImageView"
+        android:layout_toEndOf="@id/messageStartGuideline"
+        android:contentDescription="@string/room_threads_filter" />
+
 </RelativeLayout>