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+/** 
+ * @file lllogin.h
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * 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_LLLOGIN_H
+#define LL_LLLOGIN_H
+
+#include <boost/scoped_ptr.hpp>
+
+class LLSD;
+class LLEventPump;
+
+/**
+ * @class LLLogin
+ * @brief Class to encapsulate the action and state of grid login.
+ */
+class LLLogin
+{
+public:
+	LLLogin();
+	~LLLogin();
+
+	/** 
+	 * Make a connection to a grid.
+	 * @param uri The 'well known and published' authentication URL.
+	 * @param credentials LLSD data that contians the credentials.
+	 * *NOTE:Mani The credential data can vary depending upon the authentication
+	 * method used. The current interface matches the values passed to
+	 * the XMLRPC login request.
+	 {
+		method			:	string, 
+		first			:	string,
+		last			:	string,
+		passwd			:	string,
+		start			:	string,
+		skipoptional	:	bool,
+		agree_to_tos	:	bool,
+		read_critical	:	bool,
+		last_exec_event	:	int,
+		version			:	string,
+		channel			:	string,
+		mac				:	string,
+		id0				:	string,
+		options			:   [ strings ]
+	 }
+	 
+	 */
+	void connect(const std::string& uri, const LLSD& credentials);
+	
+    /** 
+	 * Disconnect from a the current connection.
+	 */
+	void disconnect();
+
+    /** 
+	 * Retrieve the event pump from this login class.
+	 */
+	LLEventPump& getEventPump();
+
+	/*
+	Event API
+
+	LLLogin will issue multiple events to it pump to indicate the 
+	progression of states through login. The most important 
+	states are "offline" and "online" which indicate auth failure 
+	and auth success respectively.
+
+	pump: login (tweaked)
+	These are the events posted to the 'login' 
+	event pump from the login module.
+	{
+		state		:	string, // See below for the list of states.
+		progress	:   real // for progress bar.
+		data		:   LLSD // Dependent upon state.
+	}
+	
+	States for method 'login_to_simulator'
+	offline - set initially state and upon failure. data is the server response.
+	srvrequest - upon uri rewrite request. no data.
+	authenticating - upon auth request. data, 'attempt' number and 'request' llsd.
+	downloading - upon ack from auth server, before completion. no data
+	online - upon auth success. data is server response.
+
+
+	Dependencies:
+	pump: LLAres 
+	LLLogin makes a request for a SRV record from the uri provided by the connect method.
+	The following event pump should exist to service that request.
+	pump name: LLAres
+	request = {
+		op : "rewriteURI"
+		uri : string
+		reply : string
+
+	pump: LLXMLRPCListener
+	The request merely passes the credentials LLSD along, with one additional 
+	member, 'reply', which is the string name of the event pump to reply on. 
+	
+	*/
+
+private:
+	class Impl;
+	boost::scoped_ptr<Impl> mImpl;
+};
+
+#endif // LL_LLLOGIN_H