Several fixes on room creation collpasing events (Fixes #1309)

- do not collapse room member events
- collapse other type of event: topic, alias, canonical alias, powel level
- Use correct user name for collapsed version (should be fixed twice due to the previous change of excluding some room member events)
- align "join" and "left" string with Riot-Web

matrix-sdk-android/src/main/res/values/strings.xml

@@ -7,8 +7,8 @@
     <string name="notice_room_invite_no_invitee">%s\'s invitation</string>
     <string name="notice_room_invite">%1$s invited %2$s</string>
     <string name="notice_room_invite_you">%1$s invited you</string>
-    <string name="notice_room_join">%1$s joined</string>
-    <string name="notice_room_leave">%1$s left</string>
+    <string name="notice_room_join">%1$s joined the room</string>
+    <string name="notice_room_leave">%1$s left the room</string>
     <string name="notice_room_reject">%1$s rejected the invitation</string>
     <string name="notice_room_kick">%1$s kicked %2$s</string>
     <string name="notice_room_unban">%1$s unbanned %2$s</string>
@@ -246,8 +246,8 @@
     <string name="notice_room_invite_no_invitee_with_reason">%1$s\'s invitation. Reason: %2$s</string>
     <string name="notice_room_invite_with_reason">%1$s invited %2$s. Reason: %3$s</string>
     <string name="notice_room_invite_you_with_reason">%1$s invited you. Reason: %2$s</string>
-    <string name="notice_room_join_with_reason">%1$s joined. Reason: %2$s</string>
-    <string name="notice_room_leave_with_reason">%1$s left. Reason: %2$s</string>
+    <string name="notice_room_join_with_reason">%1$s joined the room. Reason: %2$s</string>
+    <string name="notice_room_leave_with_reason">%1$s left the room. Reason: %2$s</string>
     <string name="notice_room_reject_with_reason">%1$s rejected the invitation. Reason: %2$s</string>
     <string name="notice_room_kick_with_reason">%1$s kicked %2$s. Reason: %3$s</string>
     <string name="notice_room_unban_with_reason">%1$s unbanned %2$s. Reason: %3$s</string>

vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/factory/MergedHeaderItemFactory.kt

@@ -18,6 +18,7 @@ package im.vector.riotx.features.home.room.detail.timeline.factory
 
 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.model.create.RoomCreateContent
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 import im.vector.matrix.android.internal.crypto.MXCRYPTO_ALGORITHM_MEGOLM
 import im.vector.matrix.android.internal.crypto.model.event.EncryptionEventContent
@@ -43,6 +44,9 @@ class MergedHeaderItemFactory @Inject constructor(private val sessionHolder: Act
     private val collapsedEventIds = linkedSetOf<Long>()
     private val mergeItemCollapseStates = HashMap<Long, Boolean>()
 
+    /**
+     * Note: nextEvent is an older event than event
+     */
     fun create(event: TimelineEvent,
                nextEvent: TimelineEvent?,
                items: List<TimelineEvent>,
@@ -52,7 +56,8 @@ class MergedHeaderItemFactory @Inject constructor(private val sessionHolder: Act
                callback: TimelineEventController.Callback?,
                requestModelBuild: () -> Unit)
             : BasedMergedItem<*>? {
-        return if (nextEvent?.root?.getClearType() == EventType.STATE_ROOM_CREATE && event.isRoomConfiguration()) {
+        return if (nextEvent?.root?.getClearType() == EventType.STATE_ROOM_CREATE
+                && event.isRoomConfiguration(nextEvent.root.getClearContent()?.toModel<RoomCreateContent>()?.creator)) {
             // It's the first item before room.create
             // Collapse all room configuration events
             buildRoomCreationMergedSummary(currentPosition, items, event, eventIdToHighlight, requestModelBuild, callback)
@@ -127,7 +132,7 @@ class MergedHeaderItemFactory @Inject constructor(private val sessionHolder: Act
         val mergedEvents = ArrayList<TimelineEvent>().also { it.add(event) }
         var hasEncryption = false
         var encryptionAlgorithm: String? = null
-        while (prevEvent != null && prevEvent.isRoomConfiguration()) {
+        while (prevEvent != null && prevEvent.isRoomConfiguration(null)) {
             if (prevEvent.root.getClearType() == EventType.STATE_ROOM_ENCRYPTION) {
                 hasEncryption = true
                 encryptionAlgorithm = prevEvent.root.getClearContent()?.toModel<EncryptionEventContent>()?.algorithm

vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/helper/TimelineDisplayableEvents.kt

@@ -50,14 +50,23 @@ fun TimelineEvent.canBeMerged(): Boolean {
     return root.getClearType() == EventType.STATE_ROOM_MEMBER
 }
 
-fun TimelineEvent.isRoomConfiguration(): Boolean {
+fun TimelineEvent.isRoomConfiguration(roomCreatorUserId: String?): Boolean {
     return when (root.getClearType()) {
         EventType.STATE_ROOM_GUEST_ACCESS,
         EventType.STATE_ROOM_HISTORY_VISIBILITY,
         EventType.STATE_ROOM_JOIN_RULES,
-        EventType.STATE_ROOM_MEMBER,
         EventType.STATE_ROOM_NAME,
+        EventType.STATE_ROOM_TOPIC,
+        EventType.STATE_ROOM_AVATAR,
+        EventType.STATE_ROOM_ALIASES,
+        EventType.STATE_ROOM_CANONICAL_ALIAS,
+        EventType.STATE_ROOM_POWER_LEVELS,
         EventType.STATE_ROOM_ENCRYPTION -> true
+        EventType.STATE_ROOM_MEMBER     -> {
+            // Keep only room member events regarding the room creator (when he joined the room),
+            // but exclude events where the room creator invite others, or where others join
+            roomCreatorUserId != null && root.stateKey == roomCreatorUserId
+        }
         else                            -> false
     }
 }

vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/item/MergedRoomCreationItem.kt

@@ -43,7 +43,8 @@ abstract class MergedRoomCreationItem : BasedMergedItem<MergedRoomCreationItem.H
         super.bind(holder)
 
         if (attributes.isCollapsed) {
-            val data = distinctMergeData.firstOrNull()
+            // Take the oldest data
+            val data = distinctMergeData.lastOrNull()
 
             val summary = holder.expandView.resources.getString(R.string.room_created_summary_item,
                     data?.memberName ?: data?.userId ?: "")