neon, neon_news, neon_notes: prefer isEmpty over ''

packages/neon/neon/lib/src/models/account.dart

@@ -34,7 +34,7 @@ Future<Account> getAccount(
 
 String userAgent(final PackageInfo packageInfo) {
   var buildNumber = packageInfo.buildNumber;
-  if (buildNumber == '') {
+  if (buildNumber.isEmpty) {
     buildNumber = '1';
   }
   return 'Neon ${packageInfo.version}+$buildNumber';

packages/neon/neon/lib/src/utils/push_utils.dart

@@ -121,7 +121,7 @@ class PushUtils {
         if (notification?.shouldNotify ?? true) {
           final appID = notification?.app ?? pushNotification.subject.app ?? 'nextcloud';
           String? appName = localizations.appImplementationName(appID);
-          if (appName == '') {
+          if (appName.isEmpty) {
             debugPrint('Missing app name for $appID');
             appName = null;
           }

packages/neon/neon/lib/src/utils/validators.dart

@@ -5,7 +5,7 @@ String? validateHttpUrl(
   final String? input, {
   final bool httpsOnly = false,
 }) {
-  if (input == null || input == '') {
+  if (input == null || input.isEmpty) {
     return AppLocalizations.of(context).errorInvalidURL;
   }
   try {
@@ -22,7 +22,7 @@ String? validateHttpUrl(
 }
 
 String? validateNotEmpty(final BuildContext context, final String? input) {
-  if (input == null || input == '') {
+  if (input == null || input.isEmpty) {
     return AppLocalizations.of(context).errorEmptyField;
   }
 

packages/neon/neon_news/lib/widgets/feed_icon.dart

@@ -13,13 +13,16 @@ class NewsFeedIcon extends StatelessWidget {
   final BorderRadius? borderRadius;
 
   @override
-  Widget build(final BuildContext context) => NeonImageWrapper(
+  Widget build(final BuildContext context) {
+    final faviconLink = feed.faviconLink;
+
+    return NeonImageWrapper(
       color: Colors.white,
       size: Size.square(size),
       borderRadius: borderRadius,
-        child: feed.faviconLink != null && feed.faviconLink != ''
+      child: faviconLink != null && faviconLink.isNotEmpty
           ? NeonCachedUrlImage(
-                url: feed.faviconLink!,
+              url: faviconLink,
               size: Size.square(size),
               iconColor: Theme.of(context).colorScheme.primary,
             )
@@ -29,4 +32,5 @@ class NewsFeedIcon extends StatelessWidget {
               color: Theme.of(context).colorScheme.primary,
             ),
     );
+  }
 }

packages/neon/neon_notes/lib/pages/category.dart

@@ -14,7 +14,7 @@ class NotesCategoryPage extends StatelessWidget {
   Widget build(final BuildContext context) => Scaffold(
         resizeToAvoidBottomInset: false,
         appBar: AppBar(
-          title: Text(category.name != '' ? category.name : AppLocalizations.of(context).categoryUncategorized),
+          title: Text(category.name.isNotEmpty ? category.name : AppLocalizations.of(context).categoryUncategorized),
         ),
         body: NotesView(
           bloc: bloc,

packages/neon/neon_notes/lib/widgets/categories_view.dart

@@ -41,9 +41,9 @@ class NotesCategoriesView extends StatelessWidget {
     final NoteCategory category,
   ) =>
       ListTile(
-        title: Text(category.name != '' ? category.name : AppLocalizations.of(context).categoryUncategorized),
+        title: Text(category.name.isNotEmpty ? category.name : AppLocalizations.of(context).categoryUncategorized),
         subtitle: Text(AppLocalizations.of(context).categoryNotesCount(category.count)),
-        leading: category.name != ''
+        leading: category.name.isNotEmpty
             ? Icon(
                 MdiIcons.tag,
                 size: 40,

packages/neon/neon_notes/lib/widgets/category_select.dart

@@ -35,7 +35,7 @@ class NotesCategorySelect extends StatelessWidget {
             ..._categories,
           ];
 
-          if (value.text == '') {
+          if (value.text.isEmpty) {
             return categories;
           }
           return categories.where((final category) => category.toLowerCase().contains(value.text.toLowerCase()));
@@ -74,10 +74,10 @@ class NotesCategorySelect extends StatelessWidget {
                   return ListTile(
                     leading: Icon(
                       MdiIcons.tag,
-                      color: option != '' ? NotesCategoryColor.compute(option) : null,
+                      color: option.isNotEmpty ? NotesCategoryColor.compute(option) : null,
                     ),
                     title: Text(
-                      option != '' ? option : AppLocalizations.of(context).categoryUncategorized,
+                      option.isNotEmpty ? option : AppLocalizations.of(context).categoryUncategorized,
                     ),
                     onTap: () {
                       onSelected(option);

packages/neon/neon_notes/lib/widgets/notes_view.dart

@@ -54,7 +54,7 @@ class NotesView extends StatelessWidget {
             RelativeTime(
               date: DateTime.fromMillisecondsSinceEpoch(note.modified * 1000),
             ),
-            if (note.category != '') ...[
+            if (note.category.isNotEmpty) ...[
               const SizedBox(
                 width: 8,
               ),