Implements GetRandomAttack method on LearnableAttacks.

src/Library/CreatureData/LearnableAttacks.hpp

@@ -4,6 +4,7 @@
 #include <Arbutils/Assert.hpp>
 #include <Arbutils/Collections/Dictionary.hpp>
 #include <Arbutils/Collections/List.hpp>
+#include <Arbutils/Random.hpp>
 #include <unordered_map>
 #include "../Attacks/AttackData.hpp"
 
@@ -12,19 +13,29 @@ using namespace Arbutils::Collections;
 namespace CreatureLib::Library {
     class LearnableAttacks {
         Dictionary<uint8_t, List<const AttackData*>> _learnedByLevel;
+        std::unordered_set<const AttackData*> _distinctAttacks;
 
     public:
-        LearnableAttacks(size_t levelAttackCapacity)
+        explicit LearnableAttacks(size_t levelAttackCapacity)
             : _learnedByLevel(Dictionary<uint8_t, List<const AttackData*>>(levelAttackCapacity)) {
             for (auto kv : _learnedByLevel) {
-                for (auto attack : kv.second)
+                for (auto attack : kv.second) {
                     AssertNotNull(attack)
+                    _distinctAttacks.insert(attack);
+                }
             }
         }
 
+        virtual ~LearnableAttacks() = default;
+
         void AddLevelMove(uint8_t level, const AttackData* attack);
 
         const List<const AttackData*>& GetAttacksForLevel(uint8_t level) const;
+
+        virtual const AttackData* GetRandomAttack(Arbutils::Random rand = Arbutils::Random()) {
+            auto val = rand.Get(_distinctAttacks.size());
+            return *std::next(_distinctAttacks.begin(), val);
+        }
     };
 }