Remove process extension and provide isInit parameter to the processors.

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/RustTimeline.kt

@@ -212,7 +212,7 @@ class RustTimeline(
     ) { timelineItems, hasMoreToLoadBackward, hasMoreToLoadForward, roomCreator, isInit ->
         withContext(dispatcher) {
             timelineItems
-                .process { items ->
+                .let { items ->
                     roomBeginningPostProcessor.process(
                         items = items,
                         isDm = matrixRoom.isDm,
@@ -220,12 +220,20 @@ class RustTimeline(
                         hasMoreToLoadBackwards = hasMoreToLoadBackward,
                     )
                 }
-                .process(predicate = isInit) { items ->
-                    loadingIndicatorsPostProcessor.process(items, hasMoreToLoadBackward, hasMoreToLoadForward)
+                .let { items ->
+                    loadingIndicatorsPostProcessor.process(
+                        items = items,
+                        isInit = isInit,
+                        hasMoreToLoadBackward = hasMoreToLoadBackward,
+                        hasMoreToLoadForward = hasMoreToLoadForward
+                    )
                 }
                 // Keep lastForwardIndicatorsPostProcessor last
-                .process(predicate = isInit) { items ->
-                    lastForwardIndicatorsPostProcessor.process(items)
+                .let { items ->
+                    lastForwardIndicatorsPostProcessor.process(
+                        items = items,
+                        isInit = isInit,
+                    )
                 }
         }
     }.onStart {
@@ -544,14 +552,3 @@ class RustTimeline(
         }
     }
 }
-
-private suspend fun List<MatrixTimelineItem>.process(
-    predicate: Boolean = true,
-    processor: suspend (List<MatrixTimelineItem>) -> List<MatrixTimelineItem>
-): List<MatrixTimelineItem> {
-    return if (predicate) {
-        processor(this)
-    } else {
-        this
-    }
-}

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/postprocessor/LastForwardIndicatorsPostProcessor.kt

@@ -22,7 +22,9 @@ class LastForwardIndicatorsPostProcessor(
 
     fun process(
         items: List<MatrixTimelineItem>,
+        isInit: Boolean,
     ): List<MatrixTimelineItem> {
+        if (!isInit) return items
         // We don't need to add the last forward indicator if we are not in the FOCUSED_ON_EVENT mode
         if (mode != Timeline.Mode.FOCUSED_ON_EVENT) {
             return items

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/timeline/postprocessor/LoadingIndicatorsPostProcessor.kt

@@ -16,9 +16,11 @@ import io.element.android.services.toolbox.api.systemclock.SystemClock
 class LoadingIndicatorsPostProcessor(private val systemClock: SystemClock) {
     fun process(
         items: List<MatrixTimelineItem>,
+        isInit: Boolean,
         hasMoreToLoadBackward: Boolean,
         hasMoreToLoadForward: Boolean,
     ): List<MatrixTimelineItem> {
+        if (!isInit) return items
         val shouldAddForwardLoadingIndicator = hasMoreToLoadForward && items.isNotEmpty()
         val currentTimestamp = systemClock.epochMillis()
         return buildList {