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/*
* The Mana World Server
* Copyright 2007 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World 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 World 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 World; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#include <cstddef>
#include "defines.h"
#include "game-server/character.hpp"
#include "game-server/inventory.hpp"
#include "game-server/item.hpp"
#include "game-server/itemmanager.hpp"
#include "game-server/mapmanager.hpp"
#include "game-server/state.hpp"
template< typename T1, typename T2, typename T3 >
static void proxy(void (*f)(), intptr_t args[4])
{
((void (*)(T1, T2, T3))f)((T1)args[0], (T2)args[1], (T3)args[2]);
}
template< typename T1, typename T2, typename T3, typename T4 >
static void proxy(void (*f)(), intptr_t args[4])
{
((void (*)(T1, T2, T3, T4))f)((T1)args[0], (T2)args[1], (T3)args[2], (T4)args[3]);
}
/**
* An argument type that a command can use.
*/
template< typename T > struct Argument;
template<> struct Argument< int >
{ static char const type = 'n'; };
template<> struct Argument< Character * >
{ static char const type = 'c'; };
template<> struct Argument< MapComposite * >
{ static char const type = 'm'; };
template<> struct Argument< ItemClass * >
{ static char const type = 'i'; };
/**
* A command that a user can run remotely with sufficient rights.
*/
struct Command
{
char const *name;
char type[4];
void (*handler)(void (*f)(), intptr_t[4]);
void (*target)();
unsigned char level;
};
/**
* Creates a command with a 3-parameter handler.
*/
template< typename T1, typename T2, typename T3 >
static Command handle(char const *name, int level, void (*f)(T1, T2, T3))
{
Command c;
c.name = name;
c.level = level;
c.handler = &proxy< T1, T2, T3 >;
c.target = (void (*)())f;
c.type[0] = Argument<T1>::type;
c.type[1] = Argument<T2>::type;
c.type[2] = Argument<T3>::type;
c.type[3] = 0;
return c;
}
/**
* Creates a command with a 4-parameter handler.
*/
template< typename T1, typename T2, typename T3, typename T4 >
static Command handle(char const *name, int level, void (*f)(T1, T2, T3, T4))
{
Command c;
c.name = name;
c.level = level;
c.handler = &proxy< T1, T2, T3, T4 >;
c.target = (void (*)())f;
c.type[0] = Argument<T1>::type;
c.type[1] = Argument<T2>::type;
c.type[2] = Argument<T3>::type;
c.type[3] = Argument<T4>::type;
return c;
}
static void warp(Character *q, MapComposite *m, int x, int y)
{
DelayedEvent e = { EVENT_WARP, x, y, m };
GameState::enqueueEvent(q, e);
}
static void item(Character *q, ItemClass *it, int nb)
{
Inventory(q).insert(it->getDatabaseID(), nb);
}
/**
* List of remote commands.
*/
static Command const commands[] =
{
handle("warp", AL_GM, warp),
handle("item", AL_GM, item),
};
/**
* Parses a command and executes its associated handler.
*/
void runCommand(Character *ch, std::string const &text)
{
Command const *c = NULL;
std::string::size_type npos = std::string::npos;
std::string::size_type pos = text.find(' ');
std::string s(text, 1, pos == npos ? npos : pos - 1); // Skip slash.
for (int i = 0; i < (int)(sizeof(commands) / sizeof(commands[0])); ++i)
{
if (s == commands[i].name)
{
c = &commands[i];
break;
}
}
if (!c || c->level < ch->getAccountLevel())
{
// No such command or no sufficient rights.
return;
}
intptr_t args[4];
for (int i = 0; i < 4 && c->type[i]; ++i)
{
if (pos == npos || pos + 1 >= text.length())
{
// Not enough parameters.
return;
}
std::string::size_type pos2 = text.find(' ', pos + 1);
std::string arg(text, pos + 1, pos2 == npos ? npos : pos2 - pos - 1);
if (arg.empty())
{
// Empty parameter.
return;
}
switch (c->type[i])
{
case 'c':
if (arg == "#")
{
// Character itself.
args[i] = (intptr_t)ch;
}
else
{
// TODO: explicitly named character.
return;
}
break;
case 'i':
if (ItemClass *ic = ItemManager::getItem(atoi(arg.c_str())))
{
args[i] = (intptr_t)ic;
}
else
{
// No such item.
return;
}
break;
case 'm':
if (arg == "#")
{
// Map the character is on.
args[i] = (intptr_t)ch->getMap();
}
else if (MapComposite *m = MapManager::getMap(atoi(arg.c_str())))
{
args[i] = (intptr_t)m;
}
else
{
// No such map.
return;
}
break;
case 'n':
args[i] = atoi(arg.c_str());
break;
}
pos = pos2;
}
c->handler(c->target, args);
}
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