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+/** 
+ * @file lllogininstance.h
+ * @brief A host for the viewer's login connection.
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLLOGININSTANCE_H
+#define LL_LLLOGININSTANCE_H
+
+#include "lleventdispatcher.h"
+#include <boost/scoped_ptr.hpp>
+#include <boost/function.hpp>
+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>
+{
+public:
+	LLLoginInstance();
+	~LLLoginInstance();
+
+	void connect(const LLSD& credential); // Connect to the current grid choice.
+	void connect(const std::string& uri, const LLSD& credential);	// 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; }
+	LLSD getResponse(const std::string& key) { return getResponse()[key]; }
+	LLSD getResponse();
+
+	// Only valid when authSuccess == true.
+	const F64 getLastTransferRateBPS() { return mTransferRate; }
+
+		// Set whether this class will drive user interaction.
+	// If not, login failures like 'need tos agreement' will 
+	// end the login attempt.
+	void setUserInteraction(bool state) { mUserInteraction = state; } 
+	bool getUserInteraction() { return mUserInteraction; }
+
+	// Whether to tell login to skip optional update request.
+	// False by default.
+	void setSkipOptionalUpdate(bool state) { mSkipOptionalUpdate = state; }
+	void setSerialNumber(const std::string& sn) { mSerialNumber = sn; }
+	void setLastExecEvent(int lee) { mLastExecEvent = lee; }
+
+	void setNotificationsInterface(LLNotificationsInterface* ni) { mNotifications = ni; }
+
+	typedef boost::function<void()> UpdaterLauncherCallback;
+	void setUpdaterLauncher(const UpdaterLauncherCallback& ulc) { mUpdaterLauncher = ulc; }
+
+private:
+	void constructAuthParams(const LLSD& 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);
+
+	bool handleTOSResponse(bool v, const std::string& key);
+
+	void attemptComplete() { mAttemptComplete = true; } // In the future an event?
+
+	boost::scoped_ptr<LLLogin> mLoginModule;
+	LLNotificationsInterface* mNotifications;
+
+	std::string mLoginState;
+	LLSD mRequestData;
+	LLSD mResponseData;
+	bool mUserInteraction; 
+	bool mSkipOptionalUpdate;
+	bool mAttemptComplete;
+	F64 mTransferRate;
+	std::string mSerialNumber;
+	int mLastExecEvent;
+	UpdaterLauncherCallback mUpdaterLauncher;
+	boost::scoped_ptr<LLEventStream> mUpdateAppResponse;
+	LLEventDispatcher mDispatcher;
+};
+
+#endif