refactor: Add code quality reports

.gitlab-ci.yml

@@ -18,6 +18,9 @@ stages:
 code_analyze:
   stage: coverage
   script: [./scripts/code_analyze.sh]
+  artifacts:
+    reports:
+      codequality: code-quality-report.json
 
 code_analyze_beta:
   extends: code_analyze

analysis_options.yaml

@@ -15,3 +15,37 @@ analyzer:
   exclude:
     - lib/generated_plugin_registrant.dart
     - lib/l10n/*.dart
+
+dart_code_metrics:
+  metrics:
+    cyclomatic-complexity: 20
+    number-of-arguments: 4
+    maximum-nesting-level: 5
+    source-lines-of-code: 50
+    maintainability-index: 40
+  rules:
+    - no-boolean-literal-compare
+    - no-empty-block
+    - prefer-conditional-expressions
+    - no-equal-then-else
+    - no-magic-number:
+        severity: style
+    - avoid-late-keyword:
+        severity: style
+    - avoid-non-null-assertion:
+        severity: style
+    - avoid-unused-parameters
+    - binary-expression-operand-order
+    - avoid-unnecessary-setstate
+    - avoid-wrapping-in-padding
+    - prefer-const-border-radius
+    - prefer-single-widget-per-file:
+        ignore-private-widgets: true
+    - prefer-extracting-callbacks
+  metrics-exclude:
+    - test/**
+  rules-exclude:
+    - test/**
+  anti-patterns:
+    - long-method
+    - long-parameter-list

lib/pages/chat.dart

@@ -601,7 +601,7 @@ class ChatController extends State<Chat> {
 
   void scrollDown() => scrollController.jumpTo(0);
 
-  void onEmojiSelected(category, emoji) {
+  void onEmojiSelected(_, emoji) {
     setState(() => showEmojiPicker = false);
     if (emoji == null) return;
     // make sure we don't send the same emoji twice
@@ -721,7 +721,7 @@ class ChatController extends State<Chat> {
     return index + 1;
   }
 
-  void onInputBarSubmitted(String text) {
+  void onInputBarSubmitted(_) {
     send();
     FocusScope.of(context).requestFocus(inputFocus);
   }

lib/pages/homeserver_picker.dart

@@ -92,6 +92,7 @@ class HomeserverPickerController extends State<HomeserverPicker> {
         if (token != null) _loginWithToken(token);
       });
     }
+    checkHomeserverAction();
   }
 
   @override
@@ -104,7 +105,7 @@ class HomeserverPickerController extends State<HomeserverPicker> {
   /// makes sure that it is prefixed with https. Then it searches for the
   /// well-known information and forwards to the login page depending on the
   /// login type.
-  void checkHomeserverAction() async {
+  Future<void> checkHomeserverAction() async {
     _coolDown?.cancel();
     try {
       if (domain.isEmpty) throw L10n.of(context).changeTheHomeserver;
@@ -220,15 +221,9 @@ class HomeserverPickerController extends State<HomeserverPicker> {
 
   void signUpAction() => VRouter.of(context).to('signup');
 
-  bool _initialized = false;
-
   @override
   Widget build(BuildContext context) {
     Matrix.of(context).navigatorContext = context;
-    if (!_initialized) {
-      _initialized = true;
-      checkHomeserverAction();
-    }
     return HomeserverPickerView(this);
   }
 }

lib/pages/recording_dialog.dart

@@ -28,7 +28,7 @@ class _RecordingDialogState extends State<RecordingDialog> {
   final _audioRecorder = Record();
   Amplitude _amplitude;
 
-  void startRecording() async {
+  Future<void> startRecording() async {
     try {
       final tempDir = await getTemporaryDirectory();
       _recordedPath =

lib/pages/search.dart

@@ -124,7 +124,7 @@ class SearchController extends State<Search> {
         'user_id': text,
       }));
     }
-    setState(() {});
+    setState(() => null);
   }
 
   bool _init = false;

lib/pages/views/search_view.dart

@@ -63,8 +63,9 @@ class SearchView extends StatelessWidget {
               .toLowerCase()
               .contains(controller.controller.text.toLowerCase()),
     );
+    const tabCount = 3;
     return DefaultTabController(
-      length: 3,
+      length: tabCount,
       initialIndex:
           controller.controller.text?.startsWith('#') ?? false ? 0 : 1,
       child: Scaffold(
@@ -171,7 +172,8 @@ class SearchView extends StatelessWidget {
                         shrinkWrap: true,
                         padding: const EdgeInsets.all(12),
                         physics: const NeverScrollableScrollPhysics(),
-                        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                        gridDelegate:
+                            const SliverGridDelegateWithFixedCrossAxisCount(
                           crossAxisCount: 2,
                           childAspectRatio: 1,
                           crossAxisSpacing: 16,

lib/utils/background_push.dart

@@ -105,13 +105,9 @@ class BackgroundPush {
     return instance;
   }
 
-  Future<void> fullInit() async {
-    await setupPush();
-  }
+  Future<void> fullInit() => setupPush();
 
-  void handleLoginStateChanged(LoginState state) {
-    setupPush();
-  }
+  void handleLoginStateChanged(_) => setupPush();
 
   void _newFcmToken(String token) {
     _fcmToken = token;

lib/utils/resize_image.dart

@@ -6,8 +6,10 @@ import 'package:native_imaging/native_imaging.dart' as native;
 
 import 'run_in_background.dart';
 
+const int defaultMax = 800;
+
 Future<MatrixImageFile> resizeImage(MatrixImageFile file,
-    {int max = 800}) async {
+    {int max = defaultMax}) async {
   // we want to resize the image in a separate isolate, because otherwise that can
   // freeze up the UI a bit
 

lib/utils/ui_fake.dart

@@ -1,4 +1,4 @@
 // ignore: camel_case_types
 class platformViewRegistry {
-  static void registerViewFactory(String viewId, dynamic cb) {}
+  static void registerViewFactory(String _, dynamic __) {}
 }

lib/utils/url_launcher.dart

@@ -83,7 +83,7 @@ class UrlLauncher {
     launch(uri.replace(host: newHost).toString());
   }
 
-  void openMatrixToUrl([bool startDirectChat = false]) async {
+  void openMatrixToUrl() async {
     final matrix = Matrix.of(context);
     // The identifier might be a matrix.to url and needs escaping. Or, it might have multiple
     // identifiers (room id & event id), or it might also have a query part.

lib/widgets/event_content/image_bubble.dart

@@ -113,8 +113,7 @@ class _ImageBubbleState extends State<ImageBubble> {
     }
   }
 
-  Widget frameBuilder(
-      BuildContext context, Widget child, int frame, bool sync) {
+  Widget frameBuilder(_, Widget child, int frame, __) {
     // as servers might return animated gifs as thumbnails and we want them to *not* play
     // animated, we'll have to store the first frame in a variable and display that instead
     if (widget.animated) {
@@ -249,7 +248,8 @@ class _ImageBubbleState extends State<ImageBubble> {
       children: <Widget>[
         if (blurhash != null) blurhash,
         Center(
-          child: child ?? const CircularProgressIndicator.adaptive(strokeWidth: 2),
+          child:
+              child ?? const CircularProgressIndicator.adaptive(strokeWidth: 2),
         ),
       ],
     );

lib/widgets/input_bar.dart

@@ -221,7 +221,8 @@ class InputBar extends StatelessWidget {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text('/' + command, style: const TextStyle(fontFamily: 'monospace')),
+            Text('/' + command,
+                style: const TextStyle(fontFamily: 'monospace')),
             Text(_commandHint(L10n.of(context), command),
                 style: Theme.of(context).textTheme.caption),
           ],
@@ -291,7 +292,7 @@ class InputBar extends StatelessWidget {
     return Container();
   }
 
-  void insertSuggestion(BuildContext context, Map<String, String> suggestion) {
+  void insertSuggestion(_, Map<String, String> suggestion) {
     final replaceText =
         controller.text.substring(0, controller.selection.baseOffset);
     var startText = '';

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "21.0.0"
+    version: "29.0.0"
   adaptive_dialog:
     dependency: "direct main"
     description:
@@ -28,7 +28,14 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.0"
+    version: "2.6.0"
+  analyzer_plugin:
+    dependency: transitive
+    description:
+      name: analyzer_plugin
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.7.0"
   animations:
     dependency: transitive
     description:
@@ -36,6 +43,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0"
+  ansicolor:
+    dependency: transitive
+    description:
+      name: ansicolor
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
   archive:
     dependency: transitive
     description:
@@ -197,6 +211,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.6.0"
+  dart_code_metrics:
+    dependency: "direct dev"
+    description:
+      name: dart_code_metrics
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.0-dev.3"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   dbus:
     dependency: transitive
     description:

pubspec.yaml

@@ -74,6 +74,7 @@ dependencies:
 
 dev_dependencies:
   dapackages: ^1.6.0
+  dart_code_metrics: ^4.2.0-dev.3
   flutter_lints: ^1.0.4
   flutter_native_splash: ^1.2.4
   flutter_test:

scripts/code_analyze.sh

@@ -2,3 +2,4 @@
 git apply ./scripts/enable-android-google-services.patch
 flutter format lib/ test/ --set-exit-if-changed
 flutter analyze
+flutter pub run dart_code_metrics:metrics lib -r gitlab > code-quality-report.json || true