[mob][photos] Fix sort order setting not reflecting on public link opened in-app

mobile/lib/services/collections_service.dart

@@ -1067,6 +1067,24 @@ class CollectionsService {
       _cachedPublicAlbumToken[collection.id] = authToken!;
       _cachedPublicCollectionID.add(collection.id);
       _cachedPublicAlbumKey[collection.id] = albumKey;
+
+      if (collectionData['pubMagicMetadata'] != null) {
+        final utfEncodedMmd = await CryptoUtil.decryptChaCha(
+          CryptoUtil.base642bin(collectionData['pubMagicMetadata']['data']),
+          collectionKey,
+          CryptoUtil.base642bin(
+            collectionData['pubMagicMetadata']['header'],
+          ),
+        );
+        collection.mMdPubEncodedJson = utf8.decode(utfEncodedMmd);
+        collection.mMbPubVersion =
+            collectionData['pubMagicMetadata']['version'];
+        collection.pubMagicMetadata =
+            CollectionPubMagicMetadata.fromEncodedJson(
+          collection.mMdPubEncodedJson ?? '{}',
+        );
+      }
+
       collection.setName(_getDecryptedCollectionName(collection));
       return collection;
     } catch (e, s) {

mobile/lib/ui/tabs/home_widget.dart

@@ -306,8 +306,12 @@ class _HomeWidgetState extends State<HomeWidget> {
                   if (result) {
                     await dialog.show();
 
-                    final List<EnteFile> sharedFiles = await _diffFetcher
-                        .getPublicFiles(context, collection.id);
+                    final List<EnteFile> sharedFiles =
+                        await _diffFetcher.getPublicFiles(
+                      context,
+                      collection.id,
+                      collection.pubMagicMetadata.asc ?? false,
+                    );
                     await dialog.hide();
                     Navigator.of(context).pop();
 
@@ -334,8 +338,11 @@ class _HomeWidgetState extends State<HomeWidget> {
       } else {
         await dialog.show();
 
-        final List<EnteFile> sharedFiles =
-            await _diffFetcher.getPublicFiles(context, collection.id);
+        final List<EnteFile> sharedFiles = await _diffFetcher.getPublicFiles(
+          context,
+          collection.id,
+          collection.pubMagicMetadata.asc ?? false,
+        );
         await dialog.hide();
 
         await routeToPage(

mobile/lib/utils/diff_fetcher.dart

@@ -21,6 +21,7 @@ class DiffFetcher {
   Future<List<EnteFile>> getPublicFiles(
     BuildContext context,
     int collectionID,
+    bool sortAsc,
   ) async {
     try {
       final authToken = await CollectionsService.instance
@@ -95,7 +96,9 @@ class DiffFetcher {
           sinceTime = diff.last["updationTime"];
         }
       } while (hasMore);
-
+      if (sortAsc) {
+        sharedFiles.sort((a, b) => a.creationTime!.compareTo(b.creationTime!));
+      }
       return sharedFiles;
     } catch (e, s) {
       _logger.severe("Failed to decrypt collection ", e, s);