Core/Misc: Basic implemention of Transmogrification

TODO: charge money and fix some quirks and bugs
Thanks to Shauren for finding item flags and proper validation

4 files changed, 122 insertions, 0 deletions

diff --git a/src/server/game/Entities/Item/Item.cpp b/src/server/game/Entities/Item/Item.cpp
index 248b080bfdd..130aac50935 100755
--- a/src/server/game/Entities/Item/Item.cpp
+++ b/src/server/game/Entities/Item/Item.cpp
@@ -1196,3 +1196,114 @@ bool Item::CheckSoulboundTradeExpire()
 
     return false;
 }
+
+bool Item::CanBeTransmogrified() const
+{
+    ItemTemplate const* proto = GetTemplate();
+
+    if (!proto)
+        return false;
+
+    if (proto->Quality == ITEM_QUALITY_LEGENDARY)
+        return false;
+
+    if (proto->Class != ITEM_CLASS_ARMOR &&
+        proto->Class != ITEM_CLASS_WEAPON)
+        return false;
+
+    if (proto->Class == ITEM_CLASS_WEAPON && proto->SubClass == ITEM_SUBCLASS_WEAPON_FISHING_POLE)
+        return false;
+
+    if (proto->Flags2 & ITEM_FLAGS_EXTRA_CANNOT_BE_TRANSMOG)
+        return false;
+
+    if (!HasStats())
+        return false;
+
+    return true;
+}
+
+bool Item::CanTransmogrify() const
+{
+    ItemTemplate const* proto = GetTemplate();
+
+    if (!proto)
+        return false;
+
+    if (proto->Flags2 & ITEM_FLAGS_EXTRA_CANNOT_TRANSMOG)
+        return false;
+
+    if (proto->Quality == ITEM_QUALITY_LEGENDARY)
+        return false;
+
+    if (proto->Class != ITEM_CLASS_ARMOR &&
+        proto->Class != ITEM_CLASS_WEAPON)
+        return false;
+
+    if (proto->Class == ITEM_CLASS_WEAPON && proto->SubClass == ITEM_SUBCLASS_WEAPON_FISHING_POLE)
+        return false;
+
+    if (proto->Flags2 & ITEM_FLAGS_EXTRA_CAN_TRANSMOG)
+        return true;
+
+    if (!HasStats())
+        return false;
+
+    return true;
+}
+
+bool Item::CanTransmogrifyItemWithItem(Item const* transmogrified, Item const* transmogrifier)
+{
+    if (!transmogrifier || !transmogrified)
+        return false;
+
+    ItemTemplate const* proto1 = transmogrifier->GetTemplate(); // source
+    ItemTemplate const* proto2 = transmogrified->GetTemplate(); // dest
+
+    if (proto1->ItemId == proto2->ItemId)
+        return false;
+
+    if (!transmogrified->CanTransmogrify() || !transmogrifier->CanBeTransmogrified())
+        return false;
+
+    if (proto1->InventoryType == INVTYPE_BAG ||
+        proto1->InventoryType == INVTYPE_RELIC ||
+        proto1->InventoryType == INVTYPE_BODY ||
+        proto1->InventoryType == INVTYPE_FINGER ||
+        proto1->InventoryType == INVTYPE_TRINKET ||
+        proto1->InventoryType == INVTYPE_AMMO ||
+        proto1->InventoryType == INVTYPE_QUIVER)
+        return false;
+
+    if (proto1->SubClass != proto2->SubClass && (proto1->Class != ITEM_CLASS_WEAPON || !transmogrified->IsRangedWeapon() || !transmogrifier->IsRangedWeapon()))
+        return false;
+
+    if (proto1->InventoryType != proto2->InventoryType &&
+        (proto1->Class != ITEM_CLASS_WEAPON || (proto2->InventoryType != INVTYPE_WEAPONMAINHAND && proto2->InventoryType != INVTYPE_WEAPONOFFHAND)))
+        return false;
+
+    return true;
+}
+
+bool Item::HasStats() const
+{
+    if (GetItemRandomPropertyId() != 0)
+        return true;
+
+    for (uint8 i = 0; i < MAX_ITEM_PROTO_STATS; ++i)
+        if (GetTemplate()->ItemStat[i].ItemStatValue != 0)
+            return true;
+
+    return false;
+}
+
+bool Item::IsRangedWeapon() const
+{
+    ItemTemplate const* proto = GetTemplate();
+    if (proto && proto->Class == ITEM_CLASS_WEAPON)
+        return proto->SubClass == ITEM_SUBCLASS_WEAPON_BOW ||
+        proto->SubClass == ITEM_SUBCLASS_WEAPON_GUN ||
+        proto->SubClass == ITEM_SUBCLASS_WEAPON_CROSSBOW;
+
+    return false;
+}
diff --git a/src/server/game/Entities/Item/Item.h b/src/server/game/Entities/Item/Item.h
index d38e8c32e30..2f9d10bb9d5 100755
--- a/src/server/game/Entities/Item/Item.h
+++ b/src/server/game/Entities/Item/Item.h
@@ -317,10 +317,12 @@ class Item : public Object
 
         bool hasQuest(uint32 quest_id) const { return GetTemplate()->StartQuest == quest_id; }
         bool hasInvolvedQuest(uint32 /*quest_id*/) const { return false; }
+        bool HasStats() const;
         bool IsPotion() const { return GetTemplate()->IsPotion(); }
         bool IsWeaponVellum() const { return GetTemplate()->IsWeaponVellum(); }
         bool IsArmorVellum() const { return GetTemplate()->IsArmorVellum(); }
         bool IsConjuredConsumable() const { return GetTemplate()->IsConjuredConsumable(); }
+        bool IsRangedWeapon() const;
 
         // Item Refund system
         void SetNotRefundable(Player* owner, bool changestate = true, SQLTransaction* trans = NULL);
@@ -343,6 +345,11 @@ class Item : public Object
         void BuildUpdate(UpdateDataMapType&);
 
         uint32 GetScriptId() const { return GetTemplate()->ScriptId; }
+
+        bool CanBeTransmogrified() const;
+        bool CanTransmogrify() const;
+        static bool CanTransmogrifyItemWithItem(Item const* transmogrified, Item const* transmogrifier);
+
     private:
         std::string m_text;
         uint8 m_slot;
diff --git a/src/server/game/Entities/Item/ItemPrototype.h b/src/server/game/Entities/Item/ItemPrototype.h
index 9e14dcb7733..7bfe43e0691 100755
--- a/src/server/game/Entities/Item/ItemPrototype.h
+++ b/src/server/game/Entities/Item/ItemPrototype.h
@@ -197,6 +197,9 @@ enum ItemFlagsExtra
     ITEM_FLAGS_EXTRA_NEED_ROLL_DISABLED      = 0x00000100,
     ITEM_FLAGS_EXTRA_CASTER_WEAPON           = 0x00000200,
     ITEM_FLAGS_EXTRA_BNET_ACCOUNT_BOUND      = 0x00020000,
+    ITEM_FLAGS_EXTRA_CANNOT_BE_TRANSMOG      = 0x00200000,
+    ITEM_FLAGS_EXTRA_CANNOT_TRANSMOG         = 0x00400000,
+    ITEM_FLAGS_EXTRA_CAN_TRANSMOG            = 0x00800000,
 };
 
 enum ItemFlagsCustom
diff --git a/src/server/game/Entities/Unit/Unit.h b/src/server/game/Entities/Unit/Unit.h
index a010a119017..3133d75fa07 100755
--- a/src/server/game/Entities/Unit/Unit.h
+++ b/src/server/game/Entities/Unit/Unit.h
@@ -662,6 +662,7 @@ enum NPCFlags
     UNIT_NPC_FLAG_SPELLCLICK            = 0x01000000,       // cause client to send 1015 opcode (spell click)
     UNIT_NPC_FLAG_PLAYER_VEHICLE        = 0x02000000,       // players with mounts that have vehicle data should have it set
     UNIT_NPC_FLAG_REFORGER              = 0x08000000,       // reforging
+    UNIT_NPC_FLAG_TRANSMOGRIFIER        = 0x10000000,       // transmogrification
     UNIT_NPC_FLAG_VAULTKEEPER           = 0x20000000,       // void storage
 };