Refactor room list filtering to use Rust SDK

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectEvents.kt

@@ -16,4 +16,5 @@ sealed interface RoomSelectEvents {
     // TODO remove to restore multi-selection
     data object RemoveSelectedRoom : RoomSelectEvents
     data object ToggleSearchActive : RoomSelectEvents
+    data class UpdateVisibleRange(val range: IntRange): RoomSelectEvents
 }

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectPresenter.kt

@@ -29,6 +29,7 @@ import io.element.android.libraries.roomselect.api.RoomSelectMode
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.launch
 
 @AssistedInject
 class RoomSelectPresenter(
@@ -80,6 +81,9 @@ class RoomSelectPresenter(
                 }
                 RoomSelectEvents.RemoveSelectedRoom -> selectedRooms = persistentListOf()
                 RoomSelectEvents.ToggleSearchActive -> isSearchActive = !isSearchActive
+                is RoomSelectEvents.UpdateVisibleRange -> coroutineScope.launch {
+                    dataSource.updateVisibleRange(event.range)
+                }
             }
         }
 

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectSearchDataSource.kt

@@ -16,7 +16,7 @@ import io.element.android.libraries.matrix.api.room.CurrentUserMembership
 import io.element.android.libraries.matrix.api.roomlist.RoomList
 import io.element.android.libraries.matrix.api.roomlist.RoomListFilter
 import io.element.android.libraries.matrix.api.roomlist.RoomListService
-import io.element.android.libraries.matrix.api.roomlist.loadAllIncrementally
+import io.element.android.libraries.matrix.api.roomlist.updateVisibleRange
 import io.element.android.libraries.matrix.ui.model.SelectRoomInfo
 import io.element.android.libraries.matrix.ui.model.toSelectRoomInfo
 import kotlinx.collections.immutable.ImmutableList
@@ -46,14 +46,11 @@ class RoomSelectSearchDataSource(
 
     private val roomList = roomListService.createRoomList(
         pageSize = PAGE_SIZE,
-        initialFilter = RoomListFilter.all(),
         source = RoomList.Source.All,
         coroutineScope = coroutineScope
-    ).apply {
-        loadAllIncrementally(coroutineScope)
-    }
+    )
 
-    val roomInfoList: Flow<ImmutableList<SelectRoomInfo>> = roomList.filteredSummaries
+    val roomInfoList: Flow<ImmutableList<SelectRoomInfo>> = roomList.summaries
         .map { roomSummaries ->
             roomSummaries
                 .filter { it.info.currentUserMembership == CurrentUserMembership.JOINED }
@@ -63,6 +60,10 @@ class RoomSelectSearchDataSource(
         }
         .flowOn(coroutineDispatchers.computation)
 
+    suspend fun updateVisibleRange(visibleRange: IntRange) {
+        roomList.updateVisibleRange(visibleRange)
+    }
+
     suspend fun setSearchQuery(searchQuery: String) = coroutineScope {
         val filter = if (searchQuery.isBlank()) {
             RoomListFilter.all()

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectView.kt

@@ -23,6 +23,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyRow
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
@@ -51,6 +52,7 @@ import io.element.android.libraries.designsystem.theme.components.SearchBarResul
 import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.designsystem.theme.components.TextButton
 import io.element.android.libraries.designsystem.theme.components.TopAppBar
+import io.element.android.libraries.designsystem.utils.OnVisibleRangeChangeEffect
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.ui.components.SelectedRoom
 import io.element.android.libraries.matrix.ui.model.SelectRoomInfo
@@ -100,6 +102,11 @@ fun RoomSelectView(
         onBack = { onBackButton(state) }
     )
 
+    val lazyListState = rememberLazyListState()
+    OnVisibleRangeChangeEffect(lazyListState) { visibleRange ->
+        state.eventSink(RoomSelectEvents.UpdateVisibleRange(visibleRange))
+    }
+
     Scaffold(
         modifier = modifier,
         topBar = {
@@ -138,7 +145,7 @@ fun RoomSelectView(
                 resultState = state.resultState,
                 showBackButton = false,
             ) { summaries ->
-                LazyColumn {
+                LazyColumn(state = lazyListState) {
                     item {
                         SelectedRoomsHelper(
                             // TODO state.isForwarding
@@ -170,7 +177,7 @@ fun RoomSelectView(
                 Spacer(modifier = Modifier.height(20.dp))
 
                 if (state.resultState is SearchBarResultState.Results) {
-                    LazyColumn {
+                    LazyColumn(state = lazyListState) {
                         items(state.resultState.results, key = { it.roomId.value }) { roomSummary ->
                             Column {
                                 RoomSummaryView(