Core/Spells: Moved checking if item has USE: effect to Spell::CheckItems (from effect handler), also generates blizzlike error message now

--HG--
branch : trunk

src/server/game/Spells/Spell.cpp

@@ -6285,11 +6285,30 @@ SpellCastResult Spell::CheckItems()
 
                 if (targetItem->GetProto()->ItemLevel < m_spellInfo->baseLevel)
                     return SPELL_FAILED_LOWLEVEL;
+
+                bool isItemUsable = false;
+                for (uint8 i = 0; i < MAX_ITEM_PROTO_SPELLS; ++i)
+                {
+                    ItemPrototype const *proto = targetItem->GetProto();
+                    if (proto->Spells[i].SpellId && (
+                        proto->Spells[i].SpellTrigger == ITEM_SPELLTRIGGER_ON_USE ||
+                        proto->Spells[i].SpellTrigger == ITEM_SPELLTRIGGER_ON_NO_DELAY_USE))
+                    {
+                        isItemUsable = true;
+                        break;
+                    }
+                }
+
+                SpellItemEnchantmentEntry const *pEnchant = sSpellItemEnchantmentStore.LookupEntry(m_spellInfo->EffectMiscValue[i]);
+                // do not allow adding usable enchantments to items that have use effect already
+                if (pEnchant && isItemUsable)
+                    for (uint8 s = 0; s < MAX_ITEM_ENCHANTMENT_EFFECTS; ++s)
+                        if (pEnchant->type[s] == ITEM_ENCHANTMENT_TYPE_USE_SPELL)
+                            return SPELL_FAILED_ON_USE_ENCHANT;
+
                 // Not allow enchant in trade slot for some enchant type
                 if (targetItem->GetOwner() != m_caster)
                 {
-                    uint32 enchant_id = m_spellInfo->EffectMiscValue[i];
-                    SpellItemEnchantmentEntry const *pEnchant = sSpellItemEnchantmentStore.LookupEntry(enchant_id);
                     if (!pEnchant)
                         return SPELL_FAILED_ERROR;
                     if (pEnchant->slot & ENCHANTMENT_CAN_SOULBOUND)

src/server/game/Spells/SpellEffects.cpp

@@ -3424,24 +3424,6 @@ void Spell::EffectEnchantItemPerm(SpellEffIndex effIndex)
         if (!pEnchant)
             return;
         
-        // Prevent applying enchantments with Use: spell on items that already have an Use: effect, client-side check is not enough
-        for (int s = 0; s < MAX_ITEM_ENCHANTMENT_EFFECTS; ++s)
-        {
-            if (pEnchant->type[s] == ITEM_ENCHANTMENT_TYPE_USE_SPELL)
-            {
-                for (uint8 i = 0; i < MAX_ITEM_PROTO_SPELLS; ++i)
-                {
-                    ItemPrototype const *proto = itemTarget->GetProto();
-                    if (proto->Spells[i].SpellId && proto->Spells[i].SpellTrigger == ITEM_SPELLTRIGGER_ON_USE)
-                    {
-                        sLog.outError("Exploiting attempt: Player %s(GUID: %u) tried to apply an enchanement with Use: spell on an item that already has a Use: effect,"
-                                      " this should be blocked from client side.", p_caster->GetName(), p_caster->GetGUIDLow());
-                        return;
-                    }
-                }
-            }
-        }
-
         // item can be in trade slot and have owner diff. from caster
         Player* item_owner = itemTarget->GetOwner();
         if (!item_owner)