Big update.

src/strategy/actions/TradeValues.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#ifndef _PLAYERBOT_TRADEVALUES_H
+#define _PLAYERBOT_TRADEVALUES_H
+
+#include "NamedObjectContext.h"
+#include "Value.h"
+
+class Item;
+class PlayerbotAI;
+
+class ItemsUsefulToGiveValue : public CalculatedValue<std::vector<Item*>>, public Qualified
+{
+	public:
+        ItemsUsefulToGiveValue(PlayerbotAI* botAI, std::string const name = "useful to give") : CalculatedValue(botAI, name) { }
+
+        std::vector<Item*> Calculate();
+};
+
+#endif