snackBar extension method

Author: hoc081098

lib/pages/edit_or_add/edit_or_add_page.dart

@@ -95,37 +95,20 @@ class _EditOrAddPageState extends State<EditOrAddPage>
     });
     _subscriptionMessage ??=
         BlocProvider.of<EditOrAddBloc>(context).message$.listen((message) {
-      final scaffoldState = _scaffoldKey?.currentState;
-
       if (message is InvalidInformation) {
-        showSnackBar(
-          scaffoldState,
-          'Invalid information',
-        );
+        _scaffoldKey.snackBar('Invalid information');
       }
       if (message is AddContactSuccess) {
-        showSnackBar(
-          scaffoldState,
-          'Add contact successfully',
-        );
+        _scaffoldKey.snackBar('Add contact successfully');
       }
       if (message is AddContactFailure) {
-        showSnackBar(
-          scaffoldState,
-          'Add contact not successfully',
-        );
+        _scaffoldKey.snackBar('Add contact not successfully');
       }
       if (message is UpdateContactSuccess) {
-        showSnackBar(
-          scaffoldState,
-          'Update contact successfully',
-        );
+        _scaffoldKey.snackBar('Update contact successfully');
       }
       if (message is UpdateContactFailure) {
-        showSnackBar(
-          scaffoldState,
-          'Update contact not successfully',
-        );
+        _scaffoldKey.snackBar('Update contact not successfully');
       }
     });
     super.didChangeDependencies();

lib/pages/home/home_page.dart

@@ -28,16 +28,10 @@ class _HomePageState extends State<HomePage> {
 
   void _handleMessage(HomeMessage message) async {
     if (message is DeleteContactSuccess) {
-      showSnackBar(
-        _scaffoldKey?.currentState,
-        'Delete contact successfully',
-      );
+      _scaffoldKey.snackBar('Delete contact successfully');
     }
     if (message is DeleteContactFailure) {
-      showSnackBar(
-        _scaffoldKey?.currentState,
-        'Delete contact not successfully',
-      );
+      _scaffoldKey.snackBar('Delete contact not successfully');
     }
   }
 

lib/utils.dart

@@ -1,14 +1,25 @@
 import 'package:flutter/material.dart';
 
-ScaffoldFeatureController<SnackBar, SnackBarClosedReason> showSnackBar(
-  ScaffoldState scaffolState,
-  String message, [
-  Duration duration = const Duration(seconds: 2),
-]) {
-  return scaffolState?.showSnackBar(
-    SnackBar(
-      content: Text(message),
-      duration: duration,
-    ),
-  );
+extension SnackBarScaffoldStateExtension on ScaffoldState {
+  void snackBar(
+    String message, [
+    Duration duration = const Duration(seconds: 2),
+  ]) {
+    showSnackBar(
+      SnackBar(
+        content: Text(message),
+        duration: duration,
+      ),
+    );
+  }
+}
+
+extension ShowSnackbarGlobalKeyScaffoldStateExtension
+    on GlobalKey<ScaffoldState> {
+  void snackBar(
+    String message, [
+    Duration duration = const Duration(seconds: 2),
+  ]) {
+    currentState?.snackBar(message);
+  }
 }