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/**
 * @file lllogininstance.h
 * @brief A host for the viewer's login connection.
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library 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;
 * version 2.1 of the License only.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLLOGININSTANCE_H
#define LL_LLLOGININSTANCE_H

#include "lleventdispatcher.h"
#include "lleventapi.h"
#include <boost/scoped_ptr.hpp>
#include <boost/function.hpp>
#include <memory>                   // std::shared_ptr
#include "llsecapi.h"
class LLLogin;
class LLEventStream;
class LLNotificationsInterface;

// This class hosts the login module and is used to
// negotiate user authentication attempts.
class LLLoginInstance : public LLSingleton<LLLoginInstance>
{
    LLSINGLETON(LLLoginInstance);
    ~LLLoginInstance();

public:
    class Disposable;

    void connect(LLPointer<LLCredential> credentials); // Connect to the current grid choice.
    void connect(const std::string& uri, LLPointer<LLCredential> credentials);  // Connect to the given uri.
    void reconnect(); // reconnect using the current credentials.
    void disconnect();

    bool authFailure() { return mAttemptComplete && mLoginState == "offline"; }
    bool authSuccess() { return mAttemptComplete && mLoginState == "online"; }

    const std::string& getLoginState() { return mLoginState; }
    bool saveMFA() const { return mSaveMFA; }
    LLSD getResponse(const std::string& key) { return getResponse()[key]; }
    LLSD getResponse();

    // Only valid when authSuccess == true.
    const F64 getLastTransferRateBPS() { return mTransferRate; }
    void setSerialNumber(const std::string& sn) { mSerialNumber = sn; }
    void setLastExecEvent(int lee) { mLastExecEvent = lee; }
    void setLastExecDuration(S32 duration) { mLastExecDuration = duration; }
    void setPlatformInfo(const std::string platform, const std::string platform_version, const std::string platform_name);

    void setNotificationsInterface(LLNotificationsInterface* ni) { mNotifications = ni; }
    LLNotificationsInterface& getNotificationsInterface() const { return *mNotifications; }

private:
    typedef std::shared_ptr<LLEventAPI::Response> ResponsePtr;
    void constructAuthParams(LLPointer<LLCredential> user_credentials);
    void updateApp(bool mandatory, const std::string& message);
    bool updateDialogCallback(const LLSD& notification, const LLSD& response);

    bool handleLoginEvent(const LLSD& event);
    void handleLoginFailure(const LLSD& event);
    void handleLoginSuccess(const LLSD& event);
    void handleDisconnect(const LLSD& event);
    void handleIndeterminate(const LLSD& event);
    void handleLoginDisallowed(const LLSD& notification, const LLSD& response);
    void syncWithUpdater(ResponsePtr resp, const LLSD& notification, const LLSD& response);

    bool handleTOSResponse(bool v, const std::string& key);
    void showMFAChallange(const std::string& message);
    bool handleMFAChallenge(LLSD const & notif, LLSD const & response);

    void attemptComplete() { mAttemptComplete = true; } // In the future an event?

    std::unique_ptr<LLLogin> mLoginModule;
    LLNotificationsInterface* mNotifications;

    std::string mLoginState;
    LLSD mRequestData;
    LLSD mResponseData;
    bool mAttemptComplete;
    bool mSaveMFA;
    F64 mTransferRate;
    std::string mSerialNumber;
    int mLastExecEvent;
    S32 mLastExecDuration;
    std::string mPlatform;
    std::string mPlatformVersion;
    std::string mPlatformVersionName;
    LLEventDispatcher mDispatcher;
};

#endif