created simple engine but still needs to be get better

src/engine/__init__.py

@@ -0,0 +1,46 @@
+from engine.types.operation import Operation
+
+
+class SyncEngine:
+    def __init__(self):
+        pass
+
+    def sync(
+        self, cursor: int, operations: list[Operation]
+    ) -> tuple[int, list[Operation]]:
+        """Sync the local database with the server's database.
+
+        Args:
+            cursor (int): The cursor of the last operation that was applied to the local database.
+            operations (list[Operation]): The list of operations that were performed on the local database since the last sync.
+
+        Returns:
+            tuple[int, list[Operation]]: A tuple containing the new cursor and the list of operations that need to be applied to the local database.
+        """
+        # For now, just return the same cursor and an empty list of operations.
+        new_operations = self.get_operations_after_cursor(cursor)
+        if len(operations) > 0:
+            self.apply_operations(operations)
+        return cursor + len(new_operations), new_operations
+
+    def apply_operations(self, operations: list[Operation]) -> None:
+        """Apply the given operations to the local database.
+
+        Args:
+            operations (list[Operation]): The list of operations to apply to the local database.
+        """
+        # For now, just print the operations.
+        for operation in operations:
+            print("APPLYING OPERATION:", operation.model_dump(), flush=True)
+
+    def get_operations_after_cursor(self, cursor: int) -> list[Operation]:
+        """Get the list of operations that were performed on the server's database after the given cursor.
+
+        Args:
+            cursor (int): The cursor of the last operation that was applied to the local database.
+
+        Returns:
+            list[Operation]: The list of operations that were performed on the server's database after the given cursor.
+        """
+        # For now, just return an empty list of operations.
+        return []