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/*
Minetest-c55
Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef ROLLBACK_INTERFACE_HEADER
#define ROLLBACK_INTERFACE_HEADER
#include "irr_v3d.h"
#include <string>
#include <iostream>
#include "exceptions.h"
class Map;
class IGameDef;
struct MapNode;
class InventoryManager;
struct RollbackNode
{
std::string name;
int param1;
int param2;
std::string meta;
bool operator==(const RollbackNode &other)
{
return (name == other.name && param1 == other.param1 &&
param2 == other.param2 && meta == other.meta);
}
bool operator!=(const RollbackNode &other)
{
return !(*this == other);
}
RollbackNode():
param1(0),
param2(0)
{}
RollbackNode(Map *map, v3s16 p, IGameDef *gamedef);
};
struct RollbackAction
{
enum Type{
TYPE_NOTHING,
TYPE_SET_NODE,
TYPE_MODIFY_INVENTORY_STACK,
} type;
int unix_time;
std::string actor;
bool actor_is_guess;
v3s16 p;
RollbackNode n_old;
RollbackNode n_new;
std::string inventory_location;
std::string inventory_list;
u32 inventory_index;
bool inventory_add;
std::string inventory_stack;
RollbackAction():
type(TYPE_NOTHING),
unix_time(0),
actor_is_guess(false)
{}
void setSetNode(v3s16 p_, const RollbackNode &n_old_,
const RollbackNode &n_new_)
{
type = TYPE_SET_NODE;
p = p_;
n_old = n_old_;
n_new = n_new_;
}
void setModifyInventoryStack(const std::string &inventory_location_,
const std::string &inventory_list_, int index_,
bool add_, const std::string &inventory_stack_)
{
type = TYPE_MODIFY_INVENTORY_STACK;
inventory_location = inventory_location_;
inventory_list = inventory_list_;
inventory_index = index_;
inventory_add = add_;
inventory_stack = inventory_stack_;
}
// String should not contain newlines or nulls
std::string toString() const;
void fromStream(std::istream &is) throw(SerializationError);
// Eg. flowing water level changes are not important
bool isImportant(IGameDef *gamedef) const;
bool getPosition(v3s16 *dst) const;
bool applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const;
};
class IRollbackReportSink
{
public:
virtual ~IRollbackReportSink(){}
virtual void reportAction(const RollbackAction &action) = 0;
virtual std::string getActor() = 0;
virtual bool isActorGuess() = 0;
virtual void setActor(const std::string &actor, bool is_guess) = 0;
virtual std::string getSuspect(v3s16 p, float nearness_shortcut,
float min_nearness) = 0;
};
class RollbackScopeActor
{
public:
RollbackScopeActor(IRollbackReportSink *sink, const std::string &actor,
bool is_guess=false):
m_sink(sink)
{
if(m_sink){
m_actor_was = m_sink->getActor();
m_actor_was_guess = m_sink->isActorGuess();
m_sink->setActor(actor, is_guess);
}
}
~RollbackScopeActor()
{
if(m_sink){
m_sink->setActor(m_actor_was, m_actor_was_guess);
}
}
private:
IRollbackReportSink *m_sink;
std::string m_actor_was;
bool m_actor_was_guess;
};
#endif
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