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/*
* The Mana Server
* Copyright (C) 2004-2010 The Mana World Development Team
* Copyright (C) 2012 The Mana Developers
*
* This file is part of The Mana Server.
*
* The Mana Server is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* The Mana Server is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with The Mana Server. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ENTITY_H
#define ENTITY_H
#include "common/manaserv_protocol.h"
#include "game-server/component.h"
#include <sigc++/signal.h>
#include <sigc++/trackable.h>
#include <cassert>
using namespace ManaServ;
class MapComposite;
/**
* Base class for in-game objects.
*
* Knows its type, the map it resides on and is host to a number of optional
* components.
*/
class Entity : public sigc::trackable
{
public:
Entity(EntityType type, MapComposite *map = nullptr);
virtual ~Entity();
EntityType getType() const;
template <class T> void addComponent(T *component);
template <class T> T *getComponent() const;
template <class T> T *findComponent() const;
template <class T> bool hasComponent() const;
bool isVisible() const;
bool canMove() const;
bool canFight() const;
virtual void update();
MapComposite *getMap() const;
void setMap(MapComposite *map);
sigc::signal<void, Entity *> signal_inserted;
sigc::signal<void, Entity *> signal_removed;
sigc::signal<void, Entity *> signal_map_changed;
private:
Component *getComponent(ComponentType type) const;
MapComposite *mMap; /**< Map the entity is on */
EntityType mType; /**< Type of this entity. */
Component *mComponents[ComponentTypeCount];
};
/**
* Gets type of this entity.
*
* @return the type of this entity.
*/
inline EntityType Entity::getType() const
{
return mType;
}
/**
* Adds a component. Only one component of a given type can be added.
* Entity takes ownership of \a component.
*/
template <class T>
inline void Entity::addComponent(T *component)
{
mComponents[T::type] = component;
}
/**
* Returns the component of the given type, or 0 when no such component
* was set.
*/
inline Component *Entity::getComponent(ComponentType type) const
{
return mComponents[type];
}
/**
* Get a component by its class. Avoids the need for doing a static-cast in the
* calling code.
*
* Asserts that the component is actually there. Use findComponent instead if
* you're not sure whether the requested component is actually present.
*/
template <class T>
inline T *Entity::getComponent() const
{
T *component = static_cast<T*>(getComponent(T::type));
assert(component);
return component;
}
/**
* Finds a component by its class. Returns 0 when the entity does not have the
* requested component.
*/
template <class T>
inline T *Entity::findComponent() const
{
return static_cast<T*>(getComponent(T::type));
}
/**
* Returns whether this class has a certain component.
*/
template <class T>
inline bool Entity::hasComponent() const
{
return getComponent(T::type) != nullptr;
}
/**
* Returns whether this entity is visible on the map or not. (Actor)
*/
inline bool Entity::isVisible() const
{
return mType != OBJECT_OTHER;
}
/**
* Returns whether this entity can move on the map or not. (Actor)
*/
inline bool Entity::canMove() const
{
return mType == OBJECT_CHARACTER || mType == OBJECT_MONSTER ||
mType == OBJECT_NPC;
}
/**
* Returns whether this entity can fight or not. (Being)
*/
inline bool Entity::canFight() const
{
return mType == OBJECT_CHARACTER || mType == OBJECT_MONSTER;
}
/**
* Gets the map this entity is located on.
*/
inline MapComposite *Entity::getMap() const
{
return mMap;
}
/**
* Sets the map this entity is located on.
*/
inline void Entity::setMap(MapComposite *map)
{
mMap = map;
signal_map_changed.emit(this);
}
#endif // ENTITY_H
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