Merge pull request #181 from nigeltiany/feat/enable-routeconfig-option

enable routerConfig option on flutter ZeroApp.router constructor

Author: mrkahfi

packages/mobile/lib/components/app.dart

@@ -85,6 +85,7 @@ class ZeroApp extends StatelessWidget {
     this.scrollBehavior,
   })  : routeInformationProvider = null,
         routeInformationParser = null,
+        routerConfig = null,
         routerDelegate = null,
         backButtonDispatcher = null,
         super(key: key);
@@ -96,9 +97,10 @@ class ZeroApp extends StatelessWidget {
     this.darkTheme,
     this.themeMode = ThemeMode.system,
     this.routeInformationProvider,
-    required this.routeInformationParser,
-    required this.routerDelegate,
-    BackButtonDispatcher? backButtonDispatcher,
+    this.routeInformationParser,
+    this.routerConfig,
+    this.routerDelegate,
+    this.backButtonDispatcher,
     this.builder,
     this.title = '',
     this.onGenerateTitle,
@@ -121,12 +123,14 @@ class ZeroApp extends StatelessWidget {
     this.restorationScopeId,
     this.useInheritedMediaQuery = false,
     this.scrollBehavior,
-  })  : assert(routeInformationParser != null && routerDelegate != null,
-            'The routeInformationParser and routerDelegate cannot be null.'),
-        assert(supportedLocales.isNotEmpty),
+  })  : assert(routerDelegate != null || routerConfig != null),
+        assert(title != null),
+        assert(showPerformanceOverlay != null),
+        assert(checkerboardRasterCacheImages != null),
+        assert(checkerboardOffscreenLayers != null),
+        assert(showSemanticsDebugger != null),
+        assert(debugShowCheckedModeBanner != null),
         navigatorObservers = null,
-        backButtonDispatcher =
-            backButtonDispatcher ?? RootBackButtonDispatcher(),
         navigatorKey = null,
         onGenerateRoute = null,
         home = null,
@@ -209,6 +213,9 @@ class ZeroApp extends StatelessWidget {
   /// {@macro flutter.widgets.widgetsApp.navigatorObservers}
   final List<NavigatorObserver>? navigatorObservers;
 
+  /// {@macro flutter.widgets.widgetsApp.routerConfig}
+  final RouterConfig<Object>? routerConfig;
+
   /// {@macro flutter.widgets.widgetsApp.routeInformationProvider}
   final RouteInformationProvider? routeInformationProvider;
 
@@ -359,11 +366,12 @@ class ZeroApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    if (routerDelegate != null) {
+    if (routerDelegate != null || routerConfig != null) {
       return MaterialApp.router(
         routeInformationProvider: routeInformationProvider,
-        routeInformationParser: routeInformationParser!,
-        routerDelegate: routerDelegate!,
+        routeInformationParser: routeInformationParser,
+        routerConfig: routerConfig,
+        routerDelegate: routerDelegate,
         backButtonDispatcher: backButtonDispatcher,
         builder: _builder,
         title: title,