encapsulated snackbar call on error

lib/service/notifying.dart

@@ -0,0 +1,37 @@
+import 'package:flutter/material.dart';
+
+import 'url_launcher.dart' show UrlLaunchErrorCode;
+
+class Notifying {
+  static void showSnackbar(
+    BuildContext context, {
+    required String text,
+    bool isError = false,
+  }) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(
+          text,
+          style: isError
+              ? TextStyle(color: Theme.of(context).colorScheme.error)
+              : null,
+        ),
+      ),
+    );
+  }
+
+  static void showUrlErrorSnackbar(
+    BuildContext context,
+    UrlLaunchErrorCode errorCode,
+  ) {
+    String errorText = '';
+    if (errorCode == UrlLaunchErrorCode.none) {
+      return;
+    } else if (errorCode == UrlLaunchErrorCode.couldNotLaunch) {
+      errorText = 'Could not launch Url';
+    } else {
+      errorText = 'Invalid Url';
+    }
+    showSnackbar(context, text: errorText, isError: true);
+  }
+}