treewide: small refactors

lib/helpers/extensions/build_event_options.dart

@@ -41,7 +41,7 @@ extension BuildEventOptions on Event {
         .read(PinnedIdsController.provider(roomId))
         .contains(eventId);
 
-    void showReasonDialog({
+    void showReasonSheet({
       required String title,
       required String description,
       required String action,
@@ -235,7 +235,7 @@ extension BuildEventOptions on Event {
           ) &&
           !eventId.isFake)
         PopupMenuItem(
-          onTap: () => showReasonDialog(
+          onTap: () => showReasonSheet(
             title: "Delete Message",
             description:
                 "Are you sure you want to delete this message? "
@@ -260,7 +260,7 @@ extension BuildEventOptions on Event {
         ),
 
       PopupMenuItem(
-        onTap: () => showReasonDialog(
+        onTap: () => showReasonSheet(
           title: "Report",
           description:
               "Report this event to your server administrators, "

lib/helpers/extensions/get_localpart.dart

@@ -1,6 +1,9 @@
 extension GetLocalpart on String {
   String get localpart => length > 1 ? substring(1).split(":").first : "?";
 
+  /// Whether this looks like a valid Matrix user ID, e.g. `@user:example.com`.
+  bool get isValidUserId => RegExp(r"^@[^:\s]+:[^\s]+$").hasMatch(this);
+
   String? get serverName {
     final index = indexOf(":");
     return index == -1 ? null : substring(index + 1);

lib/helpers/extensions/show_about_sheet.dart

@@ -7,8 +7,8 @@ import "package:m3e_card_list/m3e_card_list.dart";
 import "package:nexus/helpers/launch_helper.dart";
 import "package:package_info_plus/package_info_plus.dart";
 
-extension ShowAboutDialog on BuildContext {
-  Future<void> showAboutDialog(WidgetRef ref) async {
+extension ShowAboutSheet on BuildContext {
+  Future<void> showAboutSheet(WidgetRef ref) async {
     final packageInfo = await PackageInfo.fromPlatform();
 
     if (mounted) {

lib/helpers/extensions/show_error_snack_bar.dart

@@ -0,0 +1,28 @@
+import "package:material_ui/material_ui.dart";
+
+extension ShowErrorSnackBar on ScaffoldMessengerState {
+  /// Shows [message] in a snackbar styled as an error.
+  ScaffoldFeatureController<SnackBar, SnackBarClosedReason> showErrorSnackBar(
+    String message, {
+    ({String label, VoidCallback onPressed})? action,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return showSnackBar(
+      .new(
+        backgroundColor: colorScheme.errorContainer,
+        content: Text(
+          message,
+          style: .new(color: colorScheme.onErrorContainer),
+        ),
+        action: action == null
+            ? null
+            : .new(
+                label: action.label,
+                onPressed: action.onPressed,
+                textColor: colorScheme.onErrorContainer,
+              ),
+      ),
+    );
+  }
+}

lib/helpers/extensions/with_progress_snackbar.dart

@@ -1,4 +1,5 @@
 import "package:material_ui/material_ui.dart";
+import "package:nexus/helpers/extensions/show_error_snack_bar.dart";
 
 extension WithProgressSnackbar on BuildContext {
   /// Shows [progress] in a snackbar while [action] runs, and shows any error
@@ -10,8 +11,6 @@ extension WithProgressSnackbar on BuildContext {
     Future<T> Function() action,
   ) async {
     final messenger = ScaffoldMessenger.of(this);
-    final colorScheme = Theme.of(this).colorScheme;
-
     final snackbar = messenger.showSnackBar(
       .new(content: Text(progress), duration: const .new(days: 1)),
     );
@@ -19,15 +18,7 @@ extension WithProgressSnackbar on BuildContext {
     try {
       return await action();
     } catch (error) {
-      messenger.showSnackBar(
-        .new(
-          backgroundColor: colorScheme.errorContainer,
-          content: Text(
-            error.toString(),
-            style: .new(color: colorScheme.onErrorContainer),
-          ),
-        ),
-      );
+      messenger.showErrorSnackBar(error.toString());
 
       return null;
     } finally {

lib/widgets/pages/select_server.dart

@@ -6,6 +6,7 @@ import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/auth_url.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_id.dart";
+import "package:nexus/helpers/extensions/show_error_snack_bar.dart";
 import "package:nexus/helpers/launch_helper.dart";
 import "package:nexus/main.dart";
 import "package:nexus/models/gomuks_exception.dart";
@@ -27,14 +28,8 @@ class const SelectServerPage({super.key}) extends HookConsumerWidget {
 
     Future<void> setHomeserver(Uri? newHomeserver) async {
       if (newHomeserver == null) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(
-              "Failed to parse homeserver URL. Are you sure you typed it correctly?",
-              style: .new(color: theme.colorScheme.onErrorContainer),
-            ),
-            backgroundColor: theme.colorScheme.errorContainer,
-          ),
+        ScaffoldMessenger.of(context).showErrorSnackBar(
+          "Failed to parse homeserver URL. Are you sure you typed it correctly?",
         );
       }
       isLoading.value = true;
@@ -58,14 +53,8 @@ class const SelectServerPage({super.key}) extends HookConsumerWidget {
             } on GomuksException catch (error) {
               if (error.errorCode != "M_UNRECOGNIZED") rethrow;
               if (context.mounted) {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(
-                      "${url.host} doesn't support OAuth login, which Nexus requires. Try a different homeserver, or ask your homeserver's admin to enable OAuth.",
-                      style: .new(color: theme.colorScheme.onErrorContainer),
-                    ),
-                    backgroundColor: theme.colorScheme.errorContainer,
-                  ),
+                ScaffoldMessenger.of(context).showErrorSnackBar(
+                  "${url.host} doesn't support OAuth login, which Nexus requires. Try a different homeserver, or ask your homeserver's admin to enable OAuth.",
                 );
               }
               return;
@@ -109,18 +98,11 @@ class const SelectServerPage({super.key}) extends HookConsumerWidget {
           }
 
           if (newUrl == null) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                content: Text(
-                  "Homeserver verification failed.",
-                  style: .new(color: theme.colorScheme.onErrorContainer),
-                ),
-                action: SnackBarAction(
-                  onPressed: () => tryLogin(newHomeserver!).onError(showError),
-                  label: "Attempt log in anyways",
-                  textColor: theme.colorScheme.onErrorContainer,
-                ),
-                backgroundColor: theme.colorScheme.errorContainer,
+            ScaffoldMessenger.of(context).showErrorSnackBar(
+              "Homeserver verification failed.",
+              action: (
+                label: "Attempt log in anyways",
+                onPressed: () => tryLogin(newHomeserver!).onError(showError),
               ),
             );
           } else {

lib/widgets/pages/settings.dart

@@ -7,7 +7,7 @@ import "package:m3e_card_list/m3e_card_list.dart";
 import "package:navigation_rail_m3e/navigation_rail_m3e.dart";
 import "package:nexus/controllers/settings_sections.dart";
 import "package:nexus/helpers/extensions/better_when.dart";
-import "package:nexus/helpers/extensions/show_about_dialog.dart";
+import "package:nexus/helpers/extensions/show_about_sheet.dart";
 import "package:nexus/widgets/pages/settings_category.dart";
 import "package:nexus/widgets/divider_text.dart";
 import "package:nexus/widgets/highlight_wrapper.dart";
@@ -106,7 +106,7 @@ class const SettingsPage({super.key}) extends ConsumerWidget {
             actionsPadding: .symmetric(horizontal: 12),
             actions: [
               IconButton(
-                onPressed: () => context.showAboutDialog(ref),
+                onPressed: () => context.showAboutSheet(ref),
                 icon: Icon(Icons.info_outline),
               ),
             ],

lib/widgets/room_menu_button.dart

@@ -1,5 +1,7 @@
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:material_ui/material_ui.dart";
+import "package:nexus/helpers/extensions/get_localpart.dart";
+import "package:nexus/helpers/extensions/with_progress_snackbar.dart";
 import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
 import "package:nexus/widgets/sheet_layout.dart";
 import "package:flutter/services.dart";
@@ -58,7 +60,7 @@ final class const RoomMenuButton(
                   final userIdController = useTextEditingController();
                   final reasonController = useTextEditingController();
                   final text = useValueListenable(userIdController).text.trim();
-                  final valid = RegExp(r"^@[^:\s]+:[^\s]+$").hasMatch(text);
+                  final valid = text.isValidUserId;
 
                   void submit() {
                     if (!valid) return;
@@ -130,19 +132,12 @@ final class const RoomMenuButton(
                     child: Text("Cancel"),
                   ),
                   TextButton(
-                    onPressed: () async {
+                    onPressed: () {
+                      context.withProgressSnackbar(
+                        "Leaving room...",
+                        () => client.leaveRoom(room!.metadata!.id),
+                      );
                       Navigator.of(context).pop();
-                      final snackbar = ScaffoldMessenger.of(context)
-                          .showSnackBar(
-                            .new(
-                              content: Text("Leaving room..."),
-                              duration: Duration(days: 1),
-                            ),
-                          );
-                      await client
-                          .leaveRoom(room!.metadata!.id)
-                          .onError(showError)
-                          .whenComplete(snackbar.close);
                     },
                     child: Text("Leave"),
                   ),

lib/widgets/start_dm_sheet.dart

@@ -1,5 +1,6 @@
 import "package:flutter_hooks/flutter_hooks.dart";
 import "package:material_ui/material_ui.dart";
+import "package:nexus/helpers/extensions/get_localpart.dart";
 import "package:nexus/helpers/extensions/create_room.dart";
 import "package:nexus/widgets/sheet_layout.dart";
 
@@ -12,7 +13,7 @@ class const StartDmSheet({final String? userId, final String? name, super.key})
     final userIdController = useTextEditingController();
     final text = useValueListenable(userIdController).text.trim();
     final target = userId ?? text;
-    final valid = RegExp(r"^@[^:\s]+:[^\s]+$").hasMatch(target);
+    final valid = target.isValidUserId;
     final encrypted = useState(true);
     final reasonController = useTextEditingController();
 

lib/widgets/user_bottom_sheet.dart

@@ -36,7 +36,7 @@ final class const UserBottomSheet(
     );
     final client = ref.read(ClientController.provider.notifier);
 
-    void showMembershipDialog(MembershipAction action) =>
+    void showMembershipSheet(MembershipAction action) =>
         context.showAdaptiveSheet(
           (context) => HookBuilder(
             builder: (context) {
@@ -229,7 +229,7 @@ final class const UserBottomSheet(
                     children: [
                       if (member.status == .join || member.status == .invite)
                         M3EButton.icon(
-                          onPressed: () => showMembershipDialog(.kick),
+                          onPressed: () => showMembershipSheet(.kick),
                           shape: .square,
                           icon: Icon(Icons.sports_martial_arts),
                           label: Text("Kick"),
@@ -244,7 +244,7 @@ final class const UserBottomSheet(
                         ),
 
                       M3EButton.icon(
-                        onPressed: () => showMembershipDialog(.ban),
+                        onPressed: () => showMembershipSheet(.ban),
                         shape: .square,
                         icon: Icon(Icons.gavel),
                         label: Text("Ban"),