Revert "Remove fuzzy searching entirely because of performance issues"

This reverts commit e86f65ad2d.

ElementX/Sources/Screens/HomeScreen/HomeScreenModels.swift

@@ -79,12 +79,14 @@ struct HomeScreenViewState: BindableState {
     
     var selectedRoomID: String?
     
+    var fuzzySearchEnabled: Bool
+    
     var visibleRooms: [HomeScreenRoom] {
         if roomListMode == .skeletons {
             return placeholderRooms
         }
         
-        if bindings.searchQuery.isEmpty {
+        if fuzzySearchEnabled || bindings.searchQuery.isEmpty {
             return rooms
         }
         

ElementX/Sources/Screens/HomeScreen/HomeScreenViewModel.swift

@@ -49,7 +49,7 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
         roomSummaryProvider = userSession.clientProxy.roomSummaryProvider
         inviteSummaryProvider = userSession.clientProxy.inviteSummaryProvider
         
-        super.init(initialViewState: HomeScreenViewState(userID: userSession.userID),
+        super.init(initialViewState: HomeScreenViewState(userID: userSession.userID, fuzzySearchEnabled: appSettings.fuzzySearchEnabled),
                    imageProvider: userSession.mediaProvider)
         
         userSession.callbacks
@@ -74,6 +74,19 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
             .weakAssign(to: \.state.selectedRoomID, on: self)
             .store(in: &cancellables)
         
+        appSettings.$fuzzySearchEnabled
+            .weakAssign(to: \.state.fuzzySearchEnabled, on: self)
+            .store(in: &cancellables)
+        
+        context.$viewState
+            .filter { _ in appSettings.fuzzySearchEnabled }
+            .map(\.bindings.searchQuery)
+            .debounceAndRemoveDuplicates()
+            .sink { [weak self] searchQuery in
+                self?.roomSummaryProvider?.updateFilterPattern(searchQuery)
+            }
+            .store(in: &cancellables)
+        
         setupRoomSummaryProviderSubscriptions()
         
         updateRooms()

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/DeveloperOptionsScreenModels.swift

@@ -49,6 +49,7 @@ protocol DeveloperOptionsProtocol: AnyObject {
     var notificationSettingsEnabled: Bool { get set }
     var swiftUITimelineEnabled: Bool { get set }
     var pollsInTimelineEnabled: Bool { get set }
+    var fuzzySearchEnabled: Bool { get set }
 }
 
 extension AppSettings: DeveloperOptionsProtocol { }

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/View/DeveloperOptionsScreen.swift

@@ -38,6 +38,13 @@ struct DeveloperOptionsScreen: View {
                 }
             }
             
+            Section("Room list") {
+                Toggle(isOn: $context.fuzzySearchEnabled) {
+                    Text("Fuzzy search")
+                    Text("Requires app reboot")
+                }
+            }
+
             Section("Notifications") {
                 Toggle(isOn: $context.notificationSettingsEnabled) {
                     Text("Show notification settings")