Big update.

src/strategy/values/SpellCastUsefulValue.h

@@ -0,0 +1,21 @@
+/*
+ * 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_SPELLCASTUSEFULVALUE_H
+#define _PLAYERBOT_SPELLCASTUSEFULVALUE_H
+
+#include "NamedObjectContext.h"
+#include "Value.h"
+
+class PlayerbotAI;
+
+class SpellCastUsefulValue : public BoolCalculatedValue, public Qualified
+{
+	public:
+        SpellCastUsefulValue(PlayerbotAI* botAI, std::string const name = "spell cast useful") : BoolCalculatedValue(botAI, name) { }
+
+        bool Calculate() override;
+};
+
+#endif