insert UndoPoint appropriately into the replica operations

taskchampion/src/taskdb/mod.rs

@@ -1,10 +1,7 @@
 use crate::server::{Server, SyncOp};
-use crate::storage::{Storage, TaskMap};
+use crate::storage::{ReplicaOp, Storage, TaskMap};
 use uuid::Uuid;
 
-#[cfg(test)]
-use crate::storage::ReplicaOp;
-
 mod apply;
 mod snapshot;
 mod sync;
@@ -43,6 +40,13 @@ impl TaskDb {
         apply::apply(txn.as_mut(), op)
     }
 
+    /// Add an UndoPoint operation to the list of replica operations.
+    pub fn add_undo_point(&mut self) -> anyhow::Result<()> {
+        let mut txn = self.storage.txn()?;
+        txn.add_operation(ReplicaOp::UndoPoint)?;
+        txn.commit()
+    }
+
     /// Get all tasks.
     pub fn all_tasks(&mut self) -> anyhow::Result<Vec<(Uuid, TaskMap)>> {
         let mut txn = self.storage.txn()?;
@@ -171,6 +175,13 @@ mod tests {
         assert_eq!(db.operations(), vec![ReplicaOp::Create { uuid }]);
     }
 
+    #[test]
+    fn test_add_undo_point() {
+        let mut db = TaskDb::new_inmemory();
+        db.add_undo_point().unwrap();
+        assert_eq!(db.operations(), vec![ReplicaOp::UndoPoint]);
+    }
+
     fn newdb() -> TaskDb {
         TaskDb::new(Box::new(InMemoryStorage::new()))
     }

taskchampion/src/taskdb/sync.rs

@@ -75,7 +75,7 @@ pub(super) fn sync(
         let mut local_ops: Vec<SyncOp> = txn
             .operations()?
             .drain(..)
-            .map(|op| op.into_sync())
+            .filter_map(|op| op.into_sync())
             .collect();
 
         // first pull changes and "rebase" on top of them