ObjectMethods.h

/*
* Copyright (C) 2010 - 2016 Eluna Lua Engine <http://emudevs.com/>
* This program is free software licensed under GPL version 3
* Please see the included DOCS/LICENSE.md for more information
*/

#ifndef OBJECTMETHODS_H
#define OBJECTMETHODS_H

/***
 * A basic game object (either an [Item] or a [WorldObject]).
 *
 * Objects in MaNGOS/Trinity are stored an a giant block of "values".
 * Subclasses of Object, like [WorldObject], extend the block with more data specific to that subclass.
 * Further subclasses, like [Player], extend it even further.
 *
 * A detailed map of all the fields in this data block can be found in the UpdateFields.h file of your emulator
 *   (it varies depending on the expansion supported).
 *
 * The GetValue methods in this class (e.g. [Object:GetInt32Value]) provide low-level access to the data block.
 * Other methods, like [Object:HasFlag] and [Object:GetScale], merely wrap the GetValue methods and provide a simpler interface.
 *
 * Inherits all methods from: none
 */
namespace LuaObject
{
    /**
     * Returns `true` if the specified flag is set, otherwise `false`.
     *
     * @param uint16 index : the index of the flags data in the [Object]
     * @param uint32 flag : the flag to check for in the flags data
     * @return bool hasFlag
     */
    int HasFlag(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint32 flag = Eluna::CHECKVAL<uint32>(L, 3);

        Eluna::Push(L, obj->HasFlag(index, flag));
        return 1;
    }

    /**
     * Returns `true` if the [Object] has been added to its [Map], otherwise `false`.
     *
     * @return bool inWorld
     */
    int IsInWorld(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->IsInWorld());
        return 1;
    }

    /**
     * Returns the data at the specified index, casted to a signed 32-bit integer.
     *
     * @param uint16 index
     * @return int32 value
     */
    int GetInt32Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        Eluna::Push(L, obj->GetInt32Value(index));
        return 1;
    }

    /**
     * Returns the data at the specified index, casted to a unsigned 32-bit integer.
     *
     * @param uint16 index
     * @return uint32 value
     */
    int GetUInt32Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        Eluna::Push(L, obj->GetUInt32Value(index));
        return 1;
    }

    /**
     * Returns the data at the specified index, casted to a single-precision floating point value.
     *
     * @param uint16 index
     * @return float value
     */
    int GetFloatValue(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        Eluna::Push(L, obj->GetFloatValue(index));
        return 1;
    }

    /**
     * Returns the data at the specified index and offset, casted to an unsigned 8-bit integer.
     *
     * E.g. if you want the second byte at index 10, you would pass in 1 as the offset.
     *
     * @param uint16 index
     * @param uint8 offset : should be 0, 1, 2, or 3
     * @return uint8 value
     */
    int GetByteValue(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint8 offset = Eluna::CHECKVAL<uint8>(L, 3);
        Eluna::Push(L, obj->GetByteValue(index, offset));
        return 1;
    }

    /**
     * Returns the data at the specified index and offset, casted to a signed 16-bit integer.
     *
     * E.g. if you want the second half-word at index 10, you would pass in 1 as the offset.
     *
     * @param uint16 index
     * @param uint8 offset : should be 0 or 1
     * @return uint16 value
     */
    int GetUInt16Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint8 offset = Eluna::CHECKVAL<uint8>(L, 3);
        Eluna::Push(L, obj->GetUInt16Value(index, offset));
        return 1;
    }

    /**
     * Returns the scale/size of the [Object].
     *
     * This affects the size of a [WorldObject] in-game, but [Item]s don't have a "scale".
     *
     * @return float scale
     */
    int GetScale(lua_State* L, Object* obj)
    {
#ifndef AZEROTHCORE
        Eluna::Push(L, obj->GetObjectScale());
#else
        Eluna::Push(L, obj->GetFloatValue(OBJECT_FIELD_SCALE_X));
#endif
        return 1;
    }

    /**
     * Returns the entry of the [Object].
     *
     * [Player]s do not have an "entry".
     *
     * @return uint32 entry
     */
    int GetEntry(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->GetEntry());
        return 1;
    }

    /**
     * Returns the GUID of the [Object].
     * 
     * GUID is an unique identifier for the object.
     * 
     * However on MaNGOS and cMangos creatures and gameobjects inside different maps can share
     * the same GUID but not on the same map.
     * 
     * On TrinityCore this value is unique across all maps
     * 
     * @return ObjectGuid guid
     */
    int GetGUID(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->GET_GUID());
        return 1;
    }

    /**
     * Returns the low-part of the [Object]'s GUID.
     * 
     * On TrinityCore all low GUIDs are different for all objects of the same type.
     * For example creatures in instances are assigned new GUIDs when the Map is created.
     * 
     * On MaNGOS and cMaNGOS low GUIDs are unique only on the same map.
     * For example creatures in instances use the same low GUID assigned for that spawn in the database.
     * This is why to identify a creature you have to know the instanceId and low GUID. See [Map:GetIntstanceId]
     *
     * @return uint32 guidLow
     */
    int GetGUIDLow(lua_State* L, Object* obj)
    {
#if defined TRINITY || AZEROTHCORE
        Eluna::Push(L, obj->GetGUID().GetCounter());
#else
        Eluna::Push(L, obj->GetGUIDLow());
#endif
        return 1;
    }

    /**
     * Returns the TypeId of the [Object].
     *
     *     enum TypeID
     *     {
     *         TYPEID_OBJECT        = 0,
     *         TYPEID_ITEM          = 1,
     *         TYPEID_CONTAINER     = 2,
     *         TYPEID_UNIT          = 3,
     *         TYPEID_PLAYER        = 4,
     *         TYPEID_GAMEOBJECT    = 5,
     *         TYPEID_DYNAMICOBJECT = 6,
     *         TYPEID_CORPSE        = 7
     *     };
     *
     * @return uint8 typeID
     */
    int GetTypeId(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->GetTypeId());
        return 1;
    }

    /**
     * Returns the data at the specified index, casted to an unsigned 64-bit integer.
     *
     * @param uint16 index
     * @return uint64 value
     */
    int GetUInt64Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        Eluna::Push(L, obj->GetUInt64Value(index));
        return 1;
    }

    /**
     * Sets the specified flag in the data value at the specified index.
     *
     * If the flag was already set, it remains set.
     *
     * To remove a flag, use [Object:RemoveFlag].
     *
     * @param uint16 index
     * @param uint32 value
     */
    int SetFlag(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint32 flag = Eluna::CHECKVAL<uint32>(L, 3);

        obj->SetFlag(index, flag);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to a signed 32-bit integer.
     *
     * @param uint16 index
     * @param int32 value
     */
    int SetInt32Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        int32 value = Eluna::CHECKVAL<int32>(L, 3);
        obj->SetInt32Value(index, value);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to an unsigned 32-bit integer.
     *
     * @param uint16 index
     * @param uint32 value
     */
    int SetUInt32Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint32 value = Eluna::CHECKVAL<uint32>(L, 3);
        obj->SetUInt32Value(index, value);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to an unsigned 32-bit integer.
     *
     * @param uint16 index
     * @param uint32 value
     */
    int UpdateUInt32Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint32 value = Eluna::CHECKVAL<uint32>(L, 3);
        obj->UpdateUInt32Value(index, value);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to a single-precision floating point value.
     *
     * @param uint16 index
     * @param float value
     */
    int SetFloatValue(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        float value = Eluna::CHECKVAL<float>(L, 3);

        obj->SetFloatValue(index, value);
        return 0;
    }

    /**
     * Sets the data at the specified index and offset to the given value, converted to an unsigned 8-bit integer.
     *
     * @param uint16 index
     * @param uint8 offset : should be 0, 1, 2, or 3
     * @param uint8 value
     */
    int SetByteValue(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint8 offset = Eluna::CHECKVAL<uint8>(L, 3);
        uint8 value = Eluna::CHECKVAL<uint8>(L, 4);
        obj->SetByteValue(index, offset, value);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to an unsigned 16-bit integer.
     *
     * @param uint16 index
     * @param uint8 offset : should be 0 or 1
     * @param uint16 value
     */
    int SetUInt16Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint8 offset = Eluna::CHECKVAL<uint8>(L, 3);
        uint16 value = Eluna::CHECKVAL<uint16>(L, 4);
        obj->SetUInt16Value(index, offset, value);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to a signed 16-bit integer.
     *
     * @param uint16 index
     * @param uint8 offset : should be 0 or 1
     * @param int16 value
     */
    int SetInt16Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint8 offset = Eluna::CHECKVAL<uint8>(L, 3);
        int16 value = Eluna::CHECKVAL<int16>(L, 4);
        obj->SetInt16Value(index, offset, value);
        return 0;
    }

    /**
     * Sets the [Object]'s scale/size to the given value.
     *
     * @param float scale
     */
    int SetScale(lua_State* L, Object* obj)
    {
        float size = Eluna::CHECKVAL<float>(L, 2);

        obj->SetObjectScale(size);
        return 0;
    }

    /**
     * Sets the data at the specified index to the given value, converted to an unsigned 64-bit integer.
     *
     * @param uint16 index
     * @param uint64 value
     */
    int SetUInt64Value(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint64 value = Eluna::CHECKVAL<uint64>(L, 3);
        obj->SetUInt64Value(index, value);
        return 0;
    }

    /**
     * Removes a flag from the value at the specified index.
     *
     * @param uint16 index
     * @param uint32 flag
     */
    int RemoveFlag(lua_State* L, Object* obj)
    {
        uint16 index = Eluna::CHECKVAL<uint16>(L, 2);
        uint32 flag = Eluna::CHECKVAL<uint32>(L, 3);

        obj->RemoveFlag(index, flag);
        return 0;
    }

    /**
     * Attempts to convert the [Object] to a [Corpse].
     *
     * If the [Object] is not a [Corpse], returns `nil`.
     *
     * @return [Corpse] corpse : the [Object] as a [Corpse], or `nil`
     */
    int ToCorpse(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->ToCorpse());
        return 1;
    }

    /**
     * Attempts to convert the [Object] to a [GameObject].
     *
     * If the [Object] is not a [GameObject], returns `nil`.
     *
     * @return [GameObject] gameObject : the [Object] as a [GameObject], or `nil`
     */
    int ToGameObject(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->ToGameObject());
        return 1;
    }

    /**
     * Attempts to convert the [Object] to a [Unit].
     *
     * If the [Object] is not a [Unit], returns `nil`.
     *
     * @return [Unit] unit : the [Object] as a [Unit], or `nil`
     */
    int ToUnit(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->ToUnit());
        return 1;
    }

    /**
     * Attempts to convert the [Object] to a [Creature].
     *
     * If the [Object] is not a [Creature], returns `nil`.
     *
     * @return [Creature] creature : the [Object] as a [Creature], or `nil`
     */
    int ToCreature(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->ToCreature());
        return 1;
    }

    /**
     * Attempts to convert the [Object] to a [Player].
     *
     * If the [Object] is not a [Player], returns `nil`.
     *
     * @return [Player] player : the [Object] as a [Player], or `nil`
     */
    int ToPlayer(lua_State* L, Object* obj)
    {
        Eluna::Push(L, obj->ToPlayer());
        return 1;
    }
};
#endif