browse up if parent deleted instead all the time root

Signed-off-by: alperozturk96 <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.kt

@@ -1572,7 +1572,12 @@ class FileDisplayActivity :
 
     private fun handleRemovedFolder(syncFolderRemotePath: String?) {
         DisplayUtils.showSnackMessage(this, R.string.sync_current_folder_was_removed, syncFolderRemotePath)
-        browseToRoot()
+        fileListFragment?.let {
+            it.parentFolderFinder.getParentOnFirstParentRemoved(syncFolderRemotePath, storageManager)?.let { target ->
+                it.listDirectory(target, MainApp.isOnlyOnDevice())
+                updateActionBarTitleAndHomeButton(target)
+            }
+        }
     }
 
     private fun updateFileList(
@@ -1896,13 +1901,13 @@ class FileDisplayActivity :
     // endregion
 
     fun browseToRoot() {
-        val listOfFiles = this.listOfFilesFragment
-        if (listOfFiles != null) { // should never be null, indeed
+        listOfFilesFragment?.let {
             val root = storageManager.getFileByPath(OCFile.ROOT_PATH)
-            listOfFiles.resetSearchAttributes()
-            file = listOfFiles.currentFile
+            it.resetSearchAttributes()
+            file = it.currentFile
             startSyncFolderOperation(root, false)
         }
+
         binding.fabMain.setImageResource(R.drawable.ic_plus)
         resetScrollingAndUpdateActionBar()
     }

app/src/main/java/com/owncloud/android/ui/fragment/OCFileListFragment.java

@@ -227,7 +227,7 @@ public class OCFileListFragment extends ExtendedListFragment implements
     protected String mLimitToMimeType;
     private FloatingActionButton mFabMain;
     public static boolean isMultipleFileSelectedForCopyOrMove = false;
-    private final ParentFolderFinder parentFolderFinder = new ParentFolderFinder();
+    public final ParentFolderFinder parentFolderFinder = new ParentFolderFinder();
 
     private static final Intent scanIntentExternalApp = new Intent("org.fairscan.app.action.SCAN_TO_PDF");
 

app/src/main/java/com/owncloud/android/ui/fragment/helper/ParentFolderFinder.kt

@@ -17,6 +17,24 @@ class ParentFolderFinder {
         private const val TAG = "ParentFolderFinder"
     }
 
+    /**
+     * User tries to move up but parent folder was deleted thus parent of parent
+     * will be used as destination else ROOT directory
+     */
+    fun getParentOnFirstParentRemoved(path: String?, storageManager: FileDataStorageManager?): OCFile? {
+        if (storageManager == null) {
+            Log_OC.e(TAG, "StorageManager is null")
+            return null
+        }
+
+        if (path.isNullOrEmpty() || path == OCFile.ROOT_PATH) {
+            Log_OC.w(TAG, "Path is null, empty, or already at root. Falling back to ROOT.")
+            return storageManager.getFileByEncryptedRemotePath(OCFile.ROOT_PATH)
+        }
+
+        return walkUpByPath(path, storageManager).second
+    }
+
     fun getParent(file: OCFile?, storageManager: FileDataStorageManager?): Pair<Int, OCFile?> {
         if (file == null || file.isRootDirectory) {
             Log_OC.e(TAG, "File is null or already at root")