1 files changed, 5 insertions, 1 deletions

diff --git a/src/data.hpp b/src/data.hpp
index dc64e6f..006f1f2 100644
--- a/src/data.hpp
+++ b/src/data.hpp
@@ -43,7 +43,8 @@ public:
     // help with database migration.
     virtual mw::E<int64_t> getSchemaVersion() const = 0;
 
-    virtual std::vector<LinkItem> items(std::optional<int64_t> parent) = 0;
+    virtual mw::E<std::vector<LinkItem>> items(std::optional<int64_t> parent) = 0;
+    virtual mw::E<int64_t> addLink(LinkItem&& link) = 0;
 
 protected:
     virtual mw::E<void> setSchemaVersion(int64_t v) const = 0;
@@ -62,6 +63,9 @@ public:
 
     mw::E<int64_t> getSchemaVersion() const override;
 
+    mw::E<std::vector<LinkItem>> items(std::optional<int64_t> parent) override;
+    mw::E<int64_t> addLink(LinkItem&& link) override;
+
     // Do not use.
     DataSourceSQLite() = default;