Adopt fuzzy searching through the RoomListService's dynamic filter

ElementX/Sources/Screens/HomeScreen/HomeScreenModels.swift

@@ -47,6 +47,7 @@ enum HomeScreenViewAction {
     case skipSessionVerification
     case updateVisibleItemRange(range: Range<Int>, isScrolling: Bool)
     case selectInvites
+    case updatedSearchQuery
 }
 
 enum HomeScreenRoomListMode: CustomStringConvertible {
@@ -84,11 +85,7 @@ struct HomeScreenViewState: BindableState {
             return placeholderRooms
         }
 
-        if bindings.searchQuery.isEmpty {
-            return rooms
-        }
-
-        return rooms.filter { $0.name.localizedStandardContains(bindings.searchQuery) }
+        return rooms
     }
 
     var bindings = HomeScreenViewStateBindings()

ElementX/Sources/Screens/HomeScreen/HomeScreenViewModel.swift

@@ -187,6 +187,8 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
             callback?(.presentStartChatScreen)
         case .selectInvites:
             callback?(.presentInvitesScreen)
+        case .updatedSearchQuery:
+            roomSummaryProvider?.updateFilterPattern(state.bindings.searchQuery)
         }
     }
 

ElementX/Sources/Screens/HomeScreen/View/HomeScreen.swift

@@ -79,8 +79,9 @@ struct HomeScreen: View {
             .onReceive(scrollViewAdapter.isScrolling) { _ in
                 updateVisibleRange()
             }
-            .onChange(of: context.searchQuery) { searchQuery in
-                guard searchQuery.isEmpty else { return }
+            .onChange(of: context.searchQuery) { _ in
+                context.send(viewAction: .updatedSearchQuery)
+
                 // Dispatch allows the view to update after changing the query
                 DispatchQueue.main.async { updateVisibleRange() }
             }

ElementX/Sources/Services/Room/RoomSummary/MockRoomSummaryProvider.swift

@@ -45,6 +45,8 @@ class MockRoomSummaryProvider: RoomSummaryProviderProtocol {
     func setRoomList(_ roomList: RoomList) { }
 
     func updateVisibleRange(_ range: Range<Int>) { }
+
+    func updateFilterPattern(_ pattern: String?) { }
 }
 
 extension Array where Element == RoomSummary {

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProvider.swift

@@ -28,6 +28,7 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
     private var roomList: RoomListProtocol?
 
     private var cancellables = Set<AnyCancellable>()
+    private var listUpdatesSubscriptionResult: RoomListEntriesWithDynamicFilterResult?
     private var listUpdatesTaskHandle: TaskHandle?
     private var stateUpdatesTaskHandle: TaskHandle?
 
@@ -73,21 +74,17 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
         self.roomList = roomList
 
         do {
-            let listUpdatesSubscriptionResult = roomList.entries(listener: RoomListEntriesListenerProxy { [weak self] updates in
+            listUpdatesSubscriptionResult = roomList.entriesWithDynamicFilter(listener: RoomListEntriesListenerProxy { [weak self] updates in
                 guard let self else { return }
                 MXLog.info("\(name): Received list update")
                 diffsPublisher.send(updates)
             })
-
-            listUpdatesTaskHandle = listUpdatesSubscriptionResult.entriesStream
-
-            rooms = listUpdatesSubscriptionResult.entries.map { roomListEntry in
-                buildSummaryForRoomListEntry(roomListEntry)
-            }
 
-            // Manually call it here as the didSet doesn't work from constructors
-            roomListSubject.send(rooms)
+            listUpdatesTaskHandle = listUpdatesSubscriptionResult?.entriesStream
 
+            // Forces the listener above to be called with the current state
+            updateFilterPattern(nil)
+
             let stateUpdatesSubscriptionResult = try roomList.loadingState(listener: RoomListStateObserver { [weak self] state in
                 guard let self else { return }
                 MXLog.info("\(name): Received state update: \(state)")
@@ -113,6 +110,15 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
         }
     }
 
+    func updateFilterPattern(_ pattern: String?) {
+        guard let pattern, !pattern.isEmpty else {
+            _ = listUpdatesSubscriptionResult?.dynamicFilter.set(kind: .all)
+            return
+        }
+
+        _ = listUpdatesSubscriptionResult?.dynamicFilter.set(kind: .fuzzyMatchRoomName(pattern: pattern.lowercased()))
+    }
+
     // MARK: - Private
 
     fileprivate func updateRoomsWithDiffs(_ diffs: [RoomListEntriesUpdate]) {

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProviderProtocol.swift

@@ -99,4 +99,6 @@ protocol RoomSummaryProviderProtocol {
     func setRoomList(_ roomList: RoomList)
 
     func updateVisibleRange(_ range: Range<Int>)
+
+    func updateFilterPattern(_ pattern: String?)
 }

changelog.d/pr-1483.feature

@@ -0,0 +1 @@
+Allow fuzzy searching for room list rooms