clientmanager.cpp

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/*
 * Copyright (C) 2001-2006 Jacek Sieka, arnetheduck on gmail point com
 *
 * This program 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
 * (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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "stdinc.h"
#include "DCPlusPlus.h"

#include "ClientManager.h"

#include "ShareManager.h"
#include "SearchManager.h"
#include "CryptoManager.h"
#include "ConnectionManager.h"
#include "FavoriteManager.h"
#include "SimpleXML.h"
#include "UserCommand.h"
#include "ResourceManager.h"

#include "AdcHub.h"
#include "NmdcHub.h"


Client* ClientManager::getClient(const string& aHubURL) {
	Client* c;
	if(Util::strnicmp("adc://", aHubURL.c_str(), 6) == 0) {
		c = new AdcHub(aHubURL, false);
	} else if(Util::strnicmp("adcs://", aHubURL.c_str(), 7) == 0) {
		c = new AdcHub(aHubURL, true);
	} else {
		c = new NmdcHub(aHubURL);
	}

	{
		Lock l(cs);
		clients.push_back(c);
	}

	c->addListener(this);
	return c;
}

void ClientManager::putClient(Client* aClient) {
	aClient->shutdown();

	fire(ClientManagerListener::ClientDisconnected(), aClient);
	aClient->removeListeners();
	
	{
		Lock l(cs);

		// Either I'm stupid or the msvc7 optimizer is doing something _very_ strange here...
		// STL-port -D_STL_DEBUG complains that .begin() and .end() don't have the same owner (!)
		//		dcassert(find(clients.begin(), clients.end(), aClient) != clients.end());
		//		clients.erase(find(clients.begin(), clients.end(), aClient));
		
		for(Client::Iter i = clients.begin(); i != clients.end(); ++i) {
			if(*i == aClient) {
				clients.erase(i);
				break;
			}
		}
	}
	delete aClient;
}

size_t ClientManager::getUserCount() {
	Lock l(cs);
	return onlineUsers.size();
}

StringList ClientManager::getHubs(const CID& cid) {
	Lock l(cs);
	StringList lst;
	OnlinePair op = onlineUsers.equal_range(cid);
	for(OnlineIter i = op.first; i != op.second; ++i) {
		lst.push_back(i->second->getClient().getHubUrl());
	}
	return lst;
}

StringList ClientManager::getHubNames(const CID& cid) {
	Lock l(cs);
	StringList lst;
	OnlinePair op = onlineUsers.equal_range(cid);
	for(OnlineIter i = op.first; i != op.second; ++i) {
		lst.push_back(i->second->getClient().getHubName());
	}
	return lst;
}

StringList ClientManager::getNicks(const CID& cid) {
	Lock l(cs);
	StringList lst;
	OnlinePair op = onlineUsers.equal_range(cid);
	for(OnlineIter i = op.first; i != op.second; ++i) {
		lst.push_back(i->second->getIdentity().getNick());
	}
	if(lst.empty()) {
		// Offline perhaps?
		UserIter i = users.find(cid);
		if(i != users.end() && !i->second->getFirstNick().empty()) {
			lst.push_back(i->second->getFirstNick());
		} else {
			lst.push_back('{' + cid.toBase32() + '}');
		}
	}
	return lst;
}

string ClientManager::getConnection(const CID& cid) {
	Lock l(cs);
	OnlineIter i = onlineUsers.find(cid);
	if(i != onlineUsers.end()) {
		return i->second->getIdentity().getConnection();
	}
	return STRING(OFFLINE);
}

int64_t ClientManager::getAvailable() {
	Lock l(cs);
	int64_t bytes = 0;
	for(OnlineIter i = onlineUsers.begin(); i != onlineUsers.end(); ++i) {
		bytes += i->second->getIdentity().getBytesShared();
	}

	return bytes;
}

bool ClientManager::isConnected(const string& aUrl) {
	Lock l(cs);

	for(Client::Iter i = clients.begin(); i != clients.end(); ++i) {
		if((*i)->getHubUrl() == aUrl) {
			return true;
		}
	}
	return false;
}

string ClientManager::findHub(const string& ipPort) {
	Lock l(cs);

	string ip;
	short port = 411;
	string::size_type i = ipPort.find(':');
	if(i == string::npos) {
		ip = ipPort;
	} else {
		ip = ipPort.substr(0, i);
		port = (short)Util::toInt(ipPort.substr(i+1));
	}

	string url;
	for(Client::Iter i = clients.begin(); i != clients.end(); ++i) {
		Client* c = *i;
		if(c->getIp() == ip) {
			// If exact match is found, return it
			if(c->getPort() == port)
				return c->getHubUrl();

			// Port is not always correct, so use this as a best guess...
			url = c->getHubUrl();
		}
	}
	
	return url;
}

User::Ptr ClientManager::findLegacyUser(const string& aNick) const throw() {
	Lock l(cs);
	dcassert(aNick.size() > 0);

	for(OnlineMap::const_iterator i = onlineUsers.begin(); i != onlineUsers.end(); ++i) {
		const OnlineUser* ou = i->second;
		if(ou->getUser()->isSet(User::NMDC) && Util::stricmp(ou->getIdentity().getNick(), aNick) == 0)
			return ou->getUser();
	}
	return User::Ptr();
}

User::Ptr ClientManager::getUser(const string& aNick, const string& aHubUrl) throw() {
	CID cid = makeCid(aNick, aHubUrl);
	Lock l(cs);

	UserIter ui = users.find(cid);
	if(ui != users.end()) {
		if(ui->second->getFirstNick().empty())		// Could happen on bad queue loads etc...
			ui->second->setFirstNick(aNick);	
		ui->second->setFlag(User::NMDC);
		return ui->second;
	}

	User::Ptr p(new User(aNick));

	p->setCID(cid);
	users.insert(make_pair(cid, p));

	return p;
}

User::Ptr ClientManager::getUser(const CID& cid) throw() {
	Lock l(cs);
	UserIter ui = users.find(cid);
	if(ui != users.end()) {
		return ui->second;
	}

	User::Ptr p(new User(cid));
	users.insert(make_pair(cid, p));
	return p;
}

User::Ptr ClientManager::findUser(const CID& cid) throw() {
	Lock l(cs);
	UserIter ui = users.find(cid);
	if(ui != users.end()) {
		return ui->second;
	}
	return NULL;
}

bool ClientManager::isOp(const User::Ptr& user, const string& aHubUrl) {
	Lock l(cs);
	pair<OnlineIter, OnlineIter> p = onlineUsers.equal_range(user->getCID());
	for(OnlineIter i = p.first; i != p.second; ++i) {
		if(i->second->getClient().getHubUrl() == aHubUrl) {
			return i->second->getClient().getMyIdentity().isOp();
		}
	}
	return false;
}

CID ClientManager::makeCid(const string& aNick, const string& aHubUrl) throw() {
	string n = Text::toLower(aNick);
	TigerHash th;
	th.update(n.c_str(), n.length());
	th.update(Text::toLower(aHubUrl).c_str(), aHubUrl.length());
	// Construct hybrid CID from the first 64 bits of the tiger hash - should be
	// fairly random, and hopefully low-collision
	return CID(th.finalize());
}

void ClientManager::putOnline(OnlineUser& ou) throw() {
	{
		Lock l(cs);
		dcassert(!ou.getUser()->getCID().isZero());
		onlineUsers.insert(make_pair(ou.getUser()->getCID(), &ou));
	}

	if(!ou.getUser()->isOnline()) {
		ou.getUser()->setFlag(User::ONLINE);
		fire(ClientManagerListener::UserConnected(), ou.getUser());
	}
}

void ClientManager::putOffline(OnlineUser& ou) throw() {
	bool lastUser = false;
	{
		Lock l(cs);
		OnlinePair op = onlineUsers.equal_range(ou.getUser()->getCID());
		dcassert(op.first != op.second);
		for(OnlineIter i = op.first; i != op.second; ++i) {
			OnlineUser* ou2 = i->second;
			/// @todo something nicer to compare with...
			if(&ou.getClient() == &ou2->getClient()) {
				lastUser = (distance(op.first, op.second) == 1);
				onlineUsers.erase(i);
				break;
			}
		}
	}

	if(lastUser) {
		ou.getUser()->unsetFlag(User::ONLINE);
		fire(ClientManagerListener::UserDisconnected(), ou.getUser());
	}