Can specify arguments for pages

lib/ui/routes/home_route.dart

@@ -23,23 +23,35 @@ class HomeRoute extends StatefulWidget {
   State<StatefulWidget> createState() => _HomeRouteState();
 }
 
+class CurrPage {
+  final BarCallbackActions action;
+  final Map<String, dynamic> args;
+
+  const CurrPage(this.action, {this.args}) : assert(action != null);
+}
+
 class _HomeRouteState extends State<HomeRoute> {
-  BarCallbackActions _currTab = BarCallbackActions.OPEN_CONVERSATIONS;
-  List<BarCallbackActions> history = List();
+  CurrPage get _currTab => history.last;
+  List<CurrPage> history = List();
 
   /// Change currently visible tab
-  void _changeTab(BarCallbackActions newTab) {
+  void _pushPage(CurrPage newPage) {
     setState(() {
-      _currTab = newTab;
+      history.add(newPage);
     });
   }
 
+  /// Pop the page
+  void _popPage() {
+    history.removeLast();
+    setState(() {});
+  }
+
   /// Allows to go to previous tab
   Future<bool> _willPop() async {
     if (history.length == 1) return true;
 
-    history.removeLast();
-    _changeTab(history[history.length - 1]);
+    _popPage();
     return false;
   }
 
@@ -64,20 +76,21 @@ class _HomeRouteState extends State<HomeRoute> {
         break;
 
       default:
-        if (_currTab != action) history.add(action);
-        _changeTab(action);
+        _pushPage(CurrPage(action));
     }
   }
 
   @override
   void initState() {
     super.initState();
-    history.add(_currTab);
+
+    // Default page: conversations list
+    _pushPage(CurrPage(BarCallbackActions.OPEN_CONVERSATIONS));
   }
 
   /// Build the body of the application
   Widget _buildBody(BuildContext context) {
-    switch (_currTab) {
+    switch (_currTab.action) {
       case BarCallbackActions.OPEN_NOTIFICATIONS:
         return NotificationsScreen();
 
@@ -109,7 +122,7 @@ class _HomeRouteState extends State<HomeRoute> {
           child: Scaffold(
             appBar: ComunicAppBar(
               onTap: _onTap,
-              selectedAction: _currTab,
+              selectedAction: _currTab.action,
             ),
             body: SafeArea(
               child: _buildBody(context),