#26: Add filtering of rooms by name.

* Add searchable to home screen.
* search ignoring case and accents
* Move home screen room search filtering to the ViewState
* Use lazy filtering for search.

Co-authored-by: Matthew Hodgson <matthew@matrix.org>
Co-authored-by: Stefan Ceriu <stefanc@matrix.org>

ElementX/Sources/Screens/HomeScreen/HomeScreenModels.swift

@@ -35,23 +35,40 @@ struct HomeScreenViewState: BindableState {
     var userAvatar: UIImage?
     
     var rooms: [HomeScreenRoom] = []
+    
     var isLoadingRooms: Bool = false
     
     var unencryptedDMs: [HomeScreenRoom] {
-        Array(rooms.filter { $0.isDirect && !$0.isEncrypted })
+        searchFilteredRooms.filter { $0.isDirect && !$0.isEncrypted }
     }
     
     var encryptedDMs: [HomeScreenRoom] {
-        Array(rooms.filter { $0.isDirect && $0.isEncrypted})
+        searchFilteredRooms.filter { $0.isDirect && $0.isEncrypted}
     }
     
     var unencryptedRooms: [HomeScreenRoom] {
-        Array(rooms.filter { !$0.isDirect && !$0.isEncrypted })
+        searchFilteredRooms.filter { !$0.isDirect && !$0.isEncrypted }
     }
     
     var encryptedRooms: [HomeScreenRoom] {
-        Array(rooms.filter { !$0.isDirect && $0.isEncrypted })
+        searchFilteredRooms.filter { !$0.isDirect && $0.isEncrypted }
     }
+    
+    private var searchFilteredRooms: LazyFilterSequence<LazySequence<[HomeScreenRoom]>.Elements> {
+        guard !bindings.searchQuery.isEmpty else {
+            // This extra filter is fine for now as there are always downstream filters
+            // but if that changes, this approach should be reconsidered.
+            return rooms.lazy.filter { _ in true }
+        }
+        
+        return rooms.lazy.filter { $0.displayName?.localizedStandardContains(bindings.searchQuery) ?? false }
+    }
+    
+    var bindings = HomeScreenViewStateBindings()
+}
+
+struct HomeScreenViewStateBindings {
+    var searchQuery: String = ""
 }
 
 struct HomeScreenRoom: Identifiable, Equatable {

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

@@ -64,6 +64,7 @@ struct HomeScreen: View {
                     }
                 }
                 .listStyle(.plain)
+                .searchable(text: $context.searchQuery)
             }
             
             Spacer()

changelog.d/26.feature

@@ -0,0 +1 @@
+Add filtering for rooms by name.