1 files changed, 42 insertions, 0 deletions
diff --git a/third_party/rust/sync15/src/engine/changeset.rs b/third_party/rust/sync15/src/engine/changeset.rs
new file mode 100644
index 0000000000..f69ce1b8fa
--- /dev/null
+++ b/third_party/rust/sync15/src/engine/changeset.rs
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::bso::{IncomingBso, OutgoingBso};
+use crate::ServerTimestamp;
+
+#[derive(Debug, Clone)]
+pub struct RecordChangeset<T> {
+    pub changes: Vec<T>,
+    /// For GETs, the last sync timestamp that should be persisted after
+    /// applying the records.
+    /// For POSTs, this is the XIUS timestamp.
+    pub timestamp: ServerTimestamp,
+    pub collection: std::borrow::Cow<'static, str>,
+}
+
+pub type IncomingChangeset = RecordChangeset<IncomingBso>;
+pub type OutgoingChangeset = RecordChangeset<OutgoingBso>;
+
+impl<T> RecordChangeset<T> {
+    #[inline]
+    pub fn new(
+        collection: impl Into<std::borrow::Cow<'static, str>>,
+        timestamp: ServerTimestamp,
+    ) -> RecordChangeset<T> {
+        Self::new_with_changes(collection, timestamp, Vec::new())
+    }
+
+    #[inline]
+    pub fn new_with_changes(
+        collection: impl Into<std::borrow::Cow<'static, str>>,
+        timestamp: ServerTimestamp,
+        changes: Vec<T>,
+    ) -> RecordChangeset<T> {
+        RecordChangeset {
+            changes,
+            timestamp,
+            collection: collection.into(),
+        }
+    }
+}