Core/StatSystem: Implemented mastery.

src/server/game/Entities/Unit/StatSystem.cpp

@@ -488,6 +488,44 @@ void Player::UpdateAllCritPercentages()
     UpdateCritPercentage(RANGED_ATTACK);
 }
 
+void Player::UpdateMastery()
+{
+    if (!CanUseMastery())
+    {
+        SetFloatValue(PLAYER_MASTERY, 0.0f);
+        return;
+    }
+
+    float value = GetTotalAuraModifier(SPELL_AURA_MASTERY);
+    value += GetRatingBonusValue(CR_MASTERY);
+    SetFloatValue(PLAYER_MASTERY, value);
+
+    TalentTabEntry const* talentTab = sTalentTabStore.LookupEntry(GetPrimaryTalentTree(GetActiveSpec()));
+    if (!talentTab)
+        return;
+
+    for (uint32 i = 0; i < MAX_MASTERY_SPELLS; ++i)
+    {
+        if (!talentTab->MasterySpellId[i])
+            continue;
+
+        if (Aura* aura = GetAura(talentTab->MasterySpellId[i]))
+        {
+            for (uint32 j = 0; j < MAX_SPELL_EFFECTS; ++j)
+            {
+                if (!aura->HasEffect(j))
+                    continue;
+
+                float mult = aura->GetSpellInfo()->Effects[j].BonusMultiplier;
+                if (G3D::fuzzyEq(mult, 0.0f))
+                    continue;
+
+                aura->GetEffect(j)->ChangeAmount(int32(value * aura->GetSpellInfo()->Effects[j].BonusMultiplier));
+            }
+        }
+    }
+}
+
 const float m_diminishing_k[MAX_CLASSES] =
 {
     0.9560f,  // Warrior