Call getFixedRoomMemberContent() when loading room members of a room

It fixes bad names for Empty room

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/events/EventExt.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 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.internal.session.events
+
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.events.model.toModel
+import org.matrix.android.sdk.api.session.room.model.RoomMemberContent
+
+internal fun Event.getFixedRoomMemberContent(): RoomMemberContent? {
+    val content = content.toModel<RoomMemberContent>()
+    // if user is leaving, we should grab his last name and avatar from prevContent
+    return if (content?.membership?.isLeft() == true) {
+        val prevContent = resolvedPrevContent().toModel<RoomMemberContent>()
+        content.copy(
+                displayName = prevContent?.displayName,
+                avatarUrl = prevContent?.avatarUrl
+        )
+    } else {
+        content
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/membership/RoomMemberEventHandler.kt

@@ -16,12 +16,12 @@
 
 package org.matrix.android.sdk.internal.session.room.membership
 
+import io.realm.Realm
 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.toModel
 import org.matrix.android.sdk.api.session.room.model.RoomMemberContent
+import org.matrix.android.sdk.internal.session.events.getFixedRoomMemberContent
 import org.matrix.android.sdk.internal.session.user.UserEntityFactory
-import io.realm.Realm
 import javax.inject.Inject
 
 internal class RoomMemberEventHandler @Inject constructor() {
@@ -31,7 +31,7 @@ internal class RoomMemberEventHandler @Inject constructor() {
             return false
         }
         val userId = event.stateKey ?: return false
-        val roomMember = event.content.toModel<RoomMemberContent>()
+        val roomMember = event.getFixedRoomMemberContent()
         return handle(realm, roomId, userId, roomMember)
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/RoomSyncHandler.kt

@@ -49,6 +49,7 @@ import org.matrix.android.sdk.internal.database.query.where
 import org.matrix.android.sdk.internal.di.MoshiProvider
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.extensions.clearWith
+import org.matrix.android.sdk.internal.session.events.getFixedRoomMemberContent
 import org.matrix.android.sdk.internal.session.initsync.ProgressReporter
 import org.matrix.android.sdk.internal.session.initsync.mapWithProgress
 import org.matrix.android.sdk.internal.session.initsync.reportSubtask
@@ -464,18 +465,4 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
             }
         }
     }
-
-    private fun Event.getFixedRoomMemberContent(): RoomMemberContent? {
-        val content = content.toModel<RoomMemberContent>()
-        // if user is leaving, we should grab his last name and avatar from prevContent
-        return if (content?.membership?.isLeft() == true) {
-            val prevContent = resolvedPrevContent().toModel<RoomMemberContent>()
-            content.copy(
-                    displayName = prevContent?.displayName,
-                    avatarUrl = prevContent?.avatarUrl
-            )
-        } else {
-            content
-        }
-    }
 }