added workflow to add bookmark from share intent

lib/pages/collection_page.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import '../model/bookmark.dart';
+import '../model/maps_link_metadata.dart';
 import '../service/bookmarks_provider.dart';
+import '../service/shared_link_provider.dart';
 import '../service/storage.dart';
 import '../service/url_launcher.dart';
 import '../widgets/create_bookmark_dialog.dart';
@@ -16,17 +19,29 @@ class CollectionPage extends StatefulWidget {
 }
 
 class _CollectionPageState extends State<CollectionPage> {
+  MapsLinkMetadata? selectedMapsLink;
+
   void onAddButtonPressed() => showDialog(
     context: context,
     builder: (context) => CreateBookmarkDialog(
       collectionId: BookmarksProvider.selectedCollectionId!,
       onSavePressed: onBookmarkSaved,
+      selectedMapsLink: selectedMapsLink,
     ),
   );
 
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (selectedMapsLink != null) onAddButtonPressed();
+    });
+  }
+
   void onBookmarkSaved(Bookmark bookmark) {
     Storage.addBookmark(bookmark);
     setState(() {});
+    context.read<SharedLinkProvider>().removeCurrentMapsLink();
   }
 
   Widget bookmarkListBuilder(BuildContext context, Bookmark bookmark) {
@@ -38,6 +53,8 @@ class _CollectionPageState extends State<CollectionPage> {
 
   @override
   Widget build(BuildContext context) {
+    SharedLinkProvider provider = context.watch<SharedLinkProvider>();
+    selectedMapsLink = provider.currentMapsLinkMetadata;
     if (BookmarksProvider.selectedCollectionId == null) {
       Navigator.of(context).pop();
     }
@@ -49,7 +66,18 @@ class _CollectionPageState extends State<CollectionPage> {
     );
 
     return Scaffold(
-      appBar: AppBar(title: Text(collection.name)),
+      appBar: AppBar(
+        title: selectedMapsLink != null
+            ? Text('Add to ${collection.name}')
+            : Text(collection.name),
+        actions: [
+          if (selectedMapsLink != null)
+            TextButton(
+              onPressed: () => provider.removeCurrentMapsLink(),
+              child: Text('Cancel'),
+            ),
+        ],
+      ),
       body: ListView.builder(
         itemBuilder: (context, index) =>
             bookmarkListBuilder(context, bookmarks.elementAt(index)),
@@ -57,7 +85,7 @@ class _CollectionPageState extends State<CollectionPage> {
       ),
       floatingActionButton: FloatingActionButton(
         onPressed: onAddButtonPressed,
-        child: Icon(Icons.add),
+        child: Icon(selectedMapsLink != null ? Icons.save : Icons.add),
       ),
     );
   }