export: action to show exported items, removed superfluous permission check

lib/widgets/viewer/entry_action_delegate.dart

@@ -3,12 +3,16 @@ import 'dart:convert';
 import 'package:aves/model/actions/entry_actions.dart';
 import 'package:aves/model/actions/move_type.dart';
 import 'package:aves/model/entry.dart';
+import 'package:aves/model/filters/album.dart';
+import 'package:aves/model/highlight.dart';
 import 'package:aves/model/source/collection_lens.dart';
 import 'package:aves/model/source/collection_source.dart';
 import 'package:aves/ref/mime_types.dart';
 import 'package:aves/services/android_app_service.dart';
 import 'package:aves/services/image_op_events.dart';
 import 'package:aves/services/services.dart';
+import 'package:aves/theme/durations.dart';
+import 'package:aves/widgets/collection/collection_page.dart';
 import 'package:aves/widgets/common/action_mixins/feedback.dart';
 import 'package:aves/widgets/common/action_mixins/permission_aware.dart';
 import 'package:aves/widgets/common/action_mixins/size_aware.dart';
@@ -20,6 +24,7 @@ import 'package:aves/widgets/viewer/debug/debug_page.dart';
 import 'package:aves/widgets/viewer/info/notifications.dart';
 import 'package:aves/widgets/viewer/printer.dart';
 import 'package:aves/widgets/viewer/source_viewer_page.dart';
+import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:pedantic/pedantic.dart';
@@ -34,8 +39,6 @@ class EntryActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMix
     required this.showInfo,
   });
 
-  bool get hasCollection => collection != null;
-
   void onActionSelected(BuildContext context, AvesEntry entry, EntryAction action) {
     switch (action) {
       case EntryAction.toggleFavourite:
@@ -140,7 +143,7 @@ class EntryActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMix
     if (!await entry.delete()) {
       showFeedback(context, context.l10n.genericFailureFeedback);
     } else {
-      if (hasCollection) {
+      if (collection != null) {
         await collection!.source.removeEntries({entry.uri});
       }
       EntryDeletedNotification(entry).dispatch(context);
@@ -164,8 +167,6 @@ class EntryActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMix
     if (destinationAlbum == null || destinationAlbum.isEmpty) return;
     if (!await checkStoragePermissionForAlbums(context, {destinationAlbum})) return;
 
-    if (!await checkStoragePermission(context, {entry})) return;
-
     if (!await checkFreeSpaceForMove(context, {entry}, destinationAlbum, MoveType.export)) return;
 
     final selection = <AvesEntry>{};
@@ -195,11 +196,51 @@ class EntryActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMix
       onDone: (processed) {
         final movedOps = processed.where((e) => e.success);
         final movedCount = movedOps.length;
+        final showAction = collection != null && movedCount > 0
+            ? SnackBarAction(
+                label: context.l10n.showButtonLabel,
+                onPressed: () async {
+                  final highlightInfo = context.read<HighlightInfo>();
+                  final targetCollection = CollectionLens(
+                    source: collection!.source,
+                    filters: {AlbumFilter(destinationAlbum, source.getAlbumDisplayName(context, destinationAlbum))},
+                    groupFactor: collection!.groupFactor,
+                    sortFactor: collection!.sortFactor,
+                  );
+                  unawaited(Navigator.pushAndRemoveUntil(
+                    context,
+                    MaterialPageRoute(
+                      settings: const RouteSettings(name: CollectionPage.routeName),
+                      builder: (context) {
+                        return CollectionPage(
+                          targetCollection,
+                        );
+                      },
+                    ),
+                    (route) => false,
+                  ));
+                  await Future.delayed(Durations.staggeredAnimationPageTarget + Durations.highlightScrollInitDelay);
+                  final newUris = movedOps.map((v) => v.newFields['uri'] as String?).toSet();
+                  final targetEntry = targetCollection.sortedEntries.firstWhereOrNull((entry) => newUris.contains(entry.uri));
+                  if (targetEntry != null) {
+                    highlightInfo.trackItem(targetEntry, animate: true, highlight: targetEntry);
+                  }
+                },
+              )
+            : null;
         if (movedCount < selectionCount) {
           final count = selectionCount - movedCount;
-          showFeedback(context, context.l10n.collectionExportFailureFeedback(count));
+          showFeedback(
+            context,
+            context.l10n.collectionExportFailureFeedback(count),
+            showAction,
+          );
         } else {
-          showFeedback(context, context.l10n.genericSuccessFeedback);
+          showFeedback(
+            context,
+            context.l10n.genericSuccessFeedback,
+            showAction,
+          );
         }
       },
     );