1 files changed, 22 insertions, 0 deletions
diff --git a/database/src/sort/mod.rs b/database/src/sort/mod.rs
new file mode 100644
index 0000000..6473f5d
--- /dev/null
+++ b/database/src/sort/mod.rs
@@ -0,0 +1,22 @@
+/*
+    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
+    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
+    Copyright (C) 2026 metamuffin <metamuffin.org>
+*/
+
+use crate::{backends::WriteTransaction, table::RowNum};
+use anyhow::Result;
+use jellycommon::jellyobject::Object;
+
+pub mod none;
+pub mod value;
+
+pub trait Index {
+    fn add(&self, db: &mut dyn WriteTransaction, row: RowNum, val: Object) -> Result<()>;
+    fn remove(&self, db: &mut dyn WriteTransaction, row: RowNum, val: Object) -> Result<()>;
+    /// Might return true if objects are identical for this index; false if not or uncertain
+    fn compare(&self, before: Object, after: Object) -> bool {
+        let _ = (before, after);
+        false
+    }
+}