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/*
* The Mana Server
* Copyright (C) 2007-2010 The Mana World Development Team
*
* 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/>.
*/
#include <cassert>
#include <list>
#include <map>
#include <string>
#include "game-server/quest.h"
#include "game-server/accountconnection.h"
#include "game-server/character.h"
#include "game-server/eventlistener.h"
#include "utils/logger.h"
typedef std::list< QuestCallback > QuestCallbacks;
typedef std::map< std::string, QuestCallbacks > PendingVariables;
struct PendingQuest
{
Character *character;
PendingVariables variables;
};
typedef std::map< int, PendingQuest > PendingQuests;
static PendingQuests pendingQuests;
bool getQuestVar(Character *ch, const std::string &name, std::string &value)
{
std::map< std::string, std::string >::iterator
i = ch->questCache.find(name);
if (i == ch->questCache.end()) return false;
value = i->second;
return true;
}
void setQuestVar(Character *ch, const std::string &name,
const std::string &value)
{
std::map< std::string, std::string >::iterator
i = ch->questCache.lower_bound(name);
if (i == ch->questCache.end() || i->first != name)
{
ch->questCache.insert(i, std::make_pair(name, value));
}
else if (i->second == value)
{
return;
}
else
{
i->second = value;
}
accountHandler->updateCharacterVar(ch, name, value);
}
/**
* Listener for deleting related quests when a character disappears.
*/
struct QuestDeathListener: EventDispatch
{
static void partialRemove(const EventListener *, Thing *);
static void fullRemove(const EventListener *, Character *);
QuestDeathListener()
{
removed = &partialRemove;
disconnected = &fullRemove;
}
};
static QuestDeathListener questDeathDummy;
static EventListener questDeathListener(&questDeathDummy);
void QuestDeathListener::partialRemove(const EventListener *, Thing *t)
{
int id = static_cast< Character * >(t)->getDatabaseID();
PendingVariables &variables = pendingQuests[id].variables;
// Remove all the callbacks, but do not remove the variable names.
for (PendingVariables::iterator i = variables.begin(),
i_end = variables.end(); i != i_end; ++i)
{
i->second.clear();
}
// The listener is kept in case a fullRemove is needed later.
}
void QuestDeathListener::fullRemove(const EventListener *, Character *ch)
{
ch->removeListener(&questDeathListener);
// Remove anything related to this character.
pendingQuests.erase(ch->getDatabaseID());
}
void recoverQuestVar(Character *ch, const std::string &name,
const QuestCallback &f)
{
assert(ch->questCache.find(name) == ch->questCache.end());
int id = ch->getDatabaseID();
PendingQuests::iterator i = pendingQuests.lower_bound(id);
if (i == pendingQuests.end() || i->first != id)
{
i = pendingQuests.insert(i, std::make_pair(id, PendingQuest()));
i->second.character = ch;
/* Register a listener, because we cannot afford to get invalid
pointers, when we finally recover the variable. */
ch->addListener(&questDeathListener);
}
i->second.variables[name].push_back(f);
accountHandler->requestCharacterVar(ch, name);
}
void recoveredQuestVar(int id, const std::string &name,
const std::string &value)
{
PendingQuests::iterator i = pendingQuests.find(id);
if (i == pendingQuests.end()) return;
Character *ch = i->second.character;
ch->removeListener(&questDeathListener);
PendingVariables &variables = i->second.variables;
PendingVariables::iterator j = variables.find(name);
if (j == variables.end())
{
LOG_ERROR("Account server recovered an unexpected quest variable.");
return;
}
ch->questCache[name] = value;
// Call the registered callbacks.
for (QuestCallbacks::const_iterator k = j->second.begin(),
k_end = j->second.end(); k != k_end; ++k)
{
k->handler(ch, name, value, k->data);
}
variables.erase(j);
if (variables.empty())
{
pendingQuests.erase(i);
}
}
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