Add weighted search

Fixes #74

lib/widgets/composer/overlays/emoji_overlay.dart

@@ -3,6 +3,7 @@ import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:material_ui/material_ui.dart";
 import "package:nexus/controllers/all_emoji.dart";
 import "package:nexus/helpers/extensions/better_when.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 import "package:nexus/models/content/image_pack.dart";
 import "package:nexus/models/image_pack.dart";
 
@@ -21,11 +22,13 @@ class const EmojiOverlay(
           children: emojis
               .map((element) => element.emojis)
               .flattened
-              .where(
-                (emoji) =>
-                    emoji.aliases.join().contains(query) ||
-                    emoji.description.contains(query) ||
-                    emoji.tags.join().contains(query),
+              .search(
+                query,
+                (emoji) => [
+                  ...emoji.aliases.map((alias) => (alias, 3)),
+                  ...emoji.tags.map((tag) => (tag, 2)),
+                  (emoji.description, 1),
+                ],
               )
               .map(
                 (emoji) => ListTile(

lib/widgets/composer/overlays/room_overlay.dart

@@ -2,6 +2,7 @@ import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:material_ui/material_ui.dart";
 import "package:nexus/controllers/rooms.dart";
 import "package:nexus/controllers/via.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 import "package:nexus/widgets/avatar_or_hash.dart";
 
 class const RoomOverlay(
@@ -14,47 +15,46 @@ class const RoomOverlay(
   Widget build(BuildContext context, WidgetRef ref) {
     final rooms = ref.watch(RoomsController.provider);
     return ListView(
-      children:
-          (query.isEmpty
-                  ? rooms.values
-                  : rooms.values.where(
-                      (room) => (room.metadata?.name ?? room.metadata?.id ?? "")
-                          .toLowerCase()
-                          .contains(query.toLowerCase()),
-                    ))
-              .map((room) {
-                final name =
-                    room.metadata?.name ??
-                    room.metadata?.canonicalAlias ??
-                    room.metadata?.id ??
-                    "Unknown Room";
-                return ListTile(
-                  leading: AvatarOrHash(
-                    room.metadata?.avatar,
-                    name,
-                    fallback: Icon(Icons.numbers),
-                  ),
-                  title: Text(name),
-                  subtitle: room.metadata?.topic == null
-                      ? null
-                      : Text(room.metadata!.topic!, maxLines: 1),
-                  onTap: () {
-                    final vias = ref
-                        .watch(ViaController.provider(room))
-                        .viaQuery;
-                    addTag(
-                      id: "[#$name](matrix:roomid/${room.metadata?.id.substring(1)}$vias)",
-                      name:
-                          (room.metadata?.canonicalAlias ?? room.metadata?.id)
-                              ?.substring(1)
-                              .split(":")
-                              .first ??
-                          "",
-                    );
-                  },
+      children: rooms.values
+          .search(
+            query,
+            (room) => [
+              (room.metadata?.name, 3),
+              (room.metadata?.canonicalAlias, 2),
+              (room.metadata?.id, 1),
+            ],
+          )
+          .map((room) {
+            final name =
+                room.metadata?.name ??
+                room.metadata?.canonicalAlias ??
+                room.metadata?.id ??
+                "Unknown Room";
+            return ListTile(
+              leading: AvatarOrHash(
+                room.metadata?.avatar,
+                name,
+                fallback: Icon(Icons.numbers),
+              ),
+              title: Text(name),
+              subtitle: room.metadata?.topic == null
+                  ? null
+                  : Text(room.metadata!.topic!, maxLines: 1),
+              onTap: () {
+                final vias = ref.watch(ViaController.provider(room)).viaQuery;
+                addTag(
+                  id: "[#$name](matrix:roomid/${room.metadata?.id.substring(1)}$vias)",
+                  name:
+                      (room.metadata?.canonicalAlias ?? room.metadata?.id)
+                          ?.substring(1)
+                          .split(":")
+                          .first ??
+                      "",
                 );
-              })
-              .toList(),
+              },
+            );
+          })
+          .toList(),
     );
   }
 }

lib/widgets/composer/overlays/user_overlay.dart

@@ -3,6 +3,7 @@ import "package:material_ui/material_ui.dart";
 import "package:nexus/controllers/members_by_status.dart";
 import "package:nexus/helpers/extensions/better_when.dart";
 import "package:nexus/helpers/extensions/get_localpart.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 import "package:nexus/models/content/membership.dart";
 import "package:nexus/widgets/avatar_or_hash.dart";
 
@@ -20,45 +21,34 @@ class const UserOverlay(
       )
       .betterWhen(
         data: (members) => ListView(
-          children:
-              (query.isEmpty
-                      ? members
-                      : members.where(
-                          (member) =>
-                              member.stateKey?.toLowerCase().contains(
-                                    query.toLowerCase(),
-                                  ) ==
-                                  true ||
-                              switch (member.content) {
-                                MembershipContent(:final displayName) =>
-                                  displayName?.toLowerCase().contains(
-                                        query.toLowerCase(),
-                                      ) ==
-                                      true,
-                                _ => false,
-                              },
-                        ))
-                  .map(
-                    (member) => switch (member.content) {
-                      MembershipContent(:final displayName, :final avatarUrl) =>
-                        ListTile(
-                          leading: AvatarOrHash(
-                            avatarUrl,
-                            displayName ?? member.stateKey!.localpart,
-                          ),
-                          title: Text(
-                            displayName ?? member.stateKey!.localpart,
-                          ),
-                          subtitle: Text(member.stateKey!),
-                          onTap: () => addTag(
-                            id: "[@$displayName](matrix:u/${member.stateKey!.substring(1)})",
-                            name: member.stateKey!.localpart,
-                          ),
-                        ),
-                      _ => SizedBox.shrink(),
-                    },
-                  )
-                  .toList(),
+          children: members
+              .search(
+                query,
+                (member) => [
+                  if (member.content case MembershipContent(:final displayName))
+                    (displayName, 2),
+                  (member.stateKey, 1),
+                ],
+              )
+              .map(
+                (member) => switch (member.content) {
+                  MembershipContent(:final displayName, :final avatarUrl) =>
+                    ListTile(
+                      leading: AvatarOrHash(
+                        avatarUrl,
+                        displayName ?? member.stateKey!.localpart,
+                      ),
+                      title: Text(displayName ?? member.stateKey!.localpart),
+                      subtitle: Text(member.stateKey!),
+                      onTap: () => addTag(
+                        id: "[@$displayName](matrix:u/${member.stateKey!.substring(1)})",
+                        name: member.stateKey!.localpart,
+                      ),
+                    ),
+                  _ => SizedBox.shrink(),
+                },
+              )
+              .toList(),
         ),
       );
 }

lib/widgets/settings/search_chooser.dart

@@ -1,6 +1,7 @@
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:flutter_hooks/flutter_hooks.dart";
 import "package:material_ui/material_ui.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 
 /// The [chosen] items, above a field searching [options] to choose more.
 class const SearchChooser({
@@ -30,15 +31,10 @@ class const SearchChooser({
 }) extends HookWidget {
   @override
   Widget build(BuildContext context) {
-    final query = useValueListenable(controller).text.trim().toLowerCase();
+    final query = useValueListenable(controller).text;
     final shown = options
-        .where(
-          (id) =>
-              !chosen.contains(id) &&
-              (nameOf(id).toLowerCase().contains(query) ||
-                  id.toLowerCase().contains(query)),
-        )
-        .toIList();
+        .where((id) => !chosen.contains(id))
+        .search(query, (id) => [(nameOf(id), 2), (id, 1)]);
 
     ListTile tileOf(String id, {Widget? trailing, VoidCallback? onTap}) =>
         ListTile(

lib/widgets/settings/settings_layout.dart

@@ -7,6 +7,7 @@ import "package:hooks_riverpod/misc.dart";
 import "package:m3e_card_list/m3e_card_list.dart";
 import "package:navigation_rail_m3e/navigation_rail_m3e.dart";
 import "package:nexus/helpers/extensions/better_when.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 import "package:nexus/models/settings_category.dart";
 import "package:nexus/widgets/pages/settings_category.dart";
 import "package:nexus/widgets/divider_text.dart";
@@ -43,32 +44,22 @@ class const SettingsLayout({
             // Only searched once shown, by which point these have loaded
             final categories =
                 ref.read(sectionsProvider).value ?? const IMap.empty();
-            final query = controller.text.toLowerCase();
-
             final matches = categories.values.flattenedToList
                 .asMap()
                 .entries
                 .expand(
-                  (categoryEntry) => categoryEntry.value.settings
-                      .asMap()
-                      .entries
-                      .where(
-                        (settingEntry) =>
-                            settingEntry.value.title.toLowerCase().contains(
-                              query,
-                            ) ||
-                            settingEntry.value.description
-                                .toLowerCase()
-                                .contains(query),
-                      )
-                      .map(
+                  (categoryEntry) =>
+                      categoryEntry.value.settings.asMap().entries.map(
                         (settingEntry) => (
                           (categoryEntry.key, settingEntry.key),
                           settingEntry.value,
                         ),
                       ),
                 )
-                .toIList();
+                .search(
+                  controller.text,
+                  (match) => [(match.$2.title, 2), (match.$2.description, 1)],
+                );
 
             return matches.map(
               (match) => ListTile(

lib/widgets/timezone_field.dart

@@ -4,6 +4,7 @@ import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:material_ui/material_ui.dart";
 import "package:material_adaptive_sheets/material_adaptive_sheets.dart";
 import "package:nexus/controllers/timezones.dart";
+import "package:nexus/helpers/extensions/weighted_search.dart";
 import "package:nexus/helpers/hooks/saving.dart";
 import "package:nexus/widgets/settings/inline_text_field.dart";
 import "package:timezone/timezone.dart";
@@ -84,7 +85,7 @@ class const TimezoneField({
               onTap: () => choose(controller, null),
             ),
           ...timezones
-              .where((timezone) => timezone.toLowerCase().contains(query))
+              .search(query, (timezone) => [(timezone, 1)])
               .map(
                 (timezone) => ListTile(
                   leading: Icon(