1 files changed, 38 insertions, 0 deletions
diff --git a/ui.qt/src/KnowledgeFragment.hpp b/ui.qt/src/KnowledgeFragment.hpp
new file mode 100644
index 0000000..9f4912d
--- /dev/null
+++ b/ui.qt/src/KnowledgeFragment.hpp
@@ -0,0 +1,38 @@
+#pragma once
+
+#include "fwd.hpp"
+
+#include <QDateTime>
+#include <cstddef>
+#include <vector>
+
+struct KnowledgeId
+{
+	size_t id;
+};
+
+class KnowledgeFragment
+{
+private:
+	QDateTime mCreateTime;
+	QDateTime mModifyTime;
+	KnowledgeId mId;
+
+public:
+    KnowledgeFragment(KnowledgeId id);
+
+    KnowledgeId getId() const;
+};
+
+class KnowledgeDatabase
+{
+private:
+	std::vector<KnowledgeFragment> mStorage;
+	std::vector<size_t> mIndex; // Mapping from KnowledgeId (index) to `storage` index
+	KnowledgeId mNextId;
+
+public:
+    KnowledgeId allocateFragment();
+    bool deleteFragment(KnowledgeId id);
+    KnowledgeFragment* getFragment(KnowledgeId id);
+};