encapsulated snackbar call on error

lib/pages/collection_page.dart

@@ -4,6 +4,7 @@ import 'package:provider/provider.dart';
 import '../model/bookmark.dart';
 import '../model/maps_link_metadata.dart';
 import '../service/bookmarks_provider.dart';
+import '../service/notifying.dart';
 import '../service/shared_link_provider.dart';
 import '../service/storage.dart';
 import '../service/url_launcher.dart';
@@ -62,8 +63,8 @@ class _CollectionPageState extends State<CollectionPage> {
     return ListTile(
       title: Text(bookmark.name),
       onTap: () => launchUrlFromString(bookmark.link).then((errorCode) {
-        if (context.mounted && errorCode != UrlLaunchErrorCode.none) {
-          return showUrlError(context, errorCode);
+        if (context.mounted) {
+          return Notifying.showUrlErrorSnackbar(context, errorCode);
         }
       }),
       onLongPress: () => editBookmark(bookmark),
@@ -109,16 +110,4 @@ class _CollectionPageState extends State<CollectionPage> {
       ),
     );
   }
-
-  void showUrlError(BuildContext context, UrlLaunchErrorCode errorCode) {
-    String errorText = '';
-    if (errorCode == UrlLaunchErrorCode.couldNotLaunch) {
-      errorText = 'Could not launch Url';
-    } else {
-      errorText = 'Invalid Url';
-    }
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(errorText)));
-  }
 }