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/*
 * Copyright (C) 2001-2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#pragma once

#include "typedefs.h"
#include "Client.h"
#include "AdcCommand.h"
#include "Socket.h"
#ifdef LUA_SCRIPT
#include "ScriptManager.h"
#endif
namespace dcpp {

class ClientManager;
class AdcHub;

#ifdef LUA_SCRIPT
struct AdcScriptInstance : public ScriptInstance {
    bool onClientMessage(AdcHub* aClient, const string& aLine);
};
#endif
class AdcHub : public Client, public CommandHandler<AdcHub>
#ifdef LUA_SCRIPT
, public AdcScriptInstance
#endif
{
public:
    using Client::send;
    using Client::connect;

    void connect(const OnlineUser& user, const string& token);
    void connect(const OnlineUser& user, string const& token, bool secure);

    void hubMessage(const string& aMessage, bool thirdPerson = false);
    void privateMessage(const OnlineUser& user, const string& aMessage, bool thirdPerson = false);
    void sendUserCmd(const UserCommand& command, const StringMap& params);
    void search(int aSizeMode, int64_t aSize, int aFileType, const string& aString, const string& aToken, const StringList& aExtList);
    void password(const string& pwd);
    void info(bool alwaysSend);

    size_t getUserCount() const { Lock l(cs); return users.size(); }
    int64_t getAvailable() const;

    string escape(string const& str) const { return AdcCommand::escape(str, false); }
    void send(const AdcCommand& cmd);

    string getMySID() { return AdcCommand::fromSID(sid); }

    static const vector<StringList>& getSearchExts();
    static StringList parseSearchExts(int flag);

    static const string CLIENT_PROTOCOL;
    static const string SECURE_CLIENT_PROTOCOL_TEST;
    static const string ADCS_FEATURE;
    static const string TCP4_FEATURE;
    static const string UDP4_FEATURE;
    static const string NAT0_FEATURE;
    static const string SEGA_FEATURE;
    static const string BASE_SUPPORT;
    static const string BAS0_SUPPORT;
    static const string TIGR_SUPPORT;
    static const string UCM0_SUPPORT;
    static const string BLO0_SUPPORT;
    static const string ZLIF_SUPPORT;
#ifdef WITH_DHT
    static const string DHT0_SUPPORT;
#endif

private:
    friend class ClientManager;
    friend class CommandHandler<AdcHub>;
    friend class Identity;

    AdcHub(const string& aHubURL, bool secure);

    AdcHub(const AdcHub&);
    AdcHub& operator=(const AdcHub&);
    virtual ~AdcHub();

    /** Map session id to OnlineUser */
    typedef unordered_map<uint32_t, OnlineUser*> SIDMap;
    typedef SIDMap::iterator SIDIter;

    bool oldPassword;
    Socket udp;
    SIDMap users;
    StringMap lastInfoMap;
    mutable CriticalSection cs;

    string salt;
    uint32_t sid;

    std::unordered_set<uint32_t> forbiddenCommands;

    static const vector<StringList> searchExts;

    virtual string checkNick(const string& nick);

    OnlineUser& getUser(const uint32_t aSID, const CID& aCID);
    OnlineUser* findUser(const uint32_t sid) const;
    OnlineUser* findUser(const CID& cid) const;
    void putUser(const uint32_t sid, bool disconnect);

    void clearUsers();

    void handle(AdcCommand::SUP, AdcCommand& c) noexcept;
    void handle(AdcCommand::SID, AdcCommand& c) noexcept;
    void handle(AdcCommand::MSG, AdcCommand& c) noexcept;
    void handle(AdcCommand::INF, AdcCommand& c) noexcept;
    void handle(AdcCommand::GPA, AdcCommand& c) noexcept;
    void handle(AdcCommand::QUI, AdcCommand& c) noexcept;
    void handle(AdcCommand::CTM, AdcCommand& c) noexcept;
    void handle(AdcCommand::RCM, AdcCommand& c) noexcept;
    void handle(AdcCommand::STA, AdcCommand& c) noexcept;
    void handle(AdcCommand::SCH, AdcCommand& c) noexcept;
    void handle(AdcCommand::CMD, AdcCommand& c) noexcept;
    void handle(AdcCommand::RES, AdcCommand& c) noexcept;
    void handle(AdcCommand::GET, AdcCommand& c) noexcept;
    void handle(AdcCommand::PSR, AdcCommand& c) noexcept;
    void handle(AdcCommand::NAT, AdcCommand& c) noexcept;
    void handle(AdcCommand::RNT, AdcCommand& c) noexcept;
    void handle(AdcCommand::ZON, AdcCommand& c) noexcept;
    void handle(AdcCommand::ZOF, AdcCommand& c) noexcept;

    template<typename T> void handle(T, AdcCommand&) { }

    void sendSearch(AdcCommand& c);
    void sendUDP(const AdcCommand& cmd) noexcept;
    void unknownProtocol(uint32_t target, const string& protocol, const string& token);
    bool secureAvail(uint32_t target, const string& protocol, const string& token);
    virtual void on(Connecting) noexcept { fire(ClientListener::Connecting(), this); }
    virtual void on(Connected) noexcept;
    virtual void on(Line, const string& aLine) noexcept;
    virtual void on(Failed, const string& aLine) noexcept;

    virtual void on(Second, uint64_t aTick) noexcept;

};

} // namespace dcpp