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+/** 
+ * @file llfacebookconnect.h
+ * @author Merov, Cho, Gil
+ * @brief Connection to Facebook Service
+ *
+ * $LicenseInfo:firstyear=2013&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2013, 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_LLFACEBOOKCONNECT_H
+#define LL_LLFACEBOOKCONNECT_H
+
+#include "llsingleton.h"
+#include "llimage.h"
+
+class LLEventPump;
+
+/**
+ * @class LLFacebookConnect
+ *
+ * Manages authentication to, and interaction with, a web service allowing the
+ * the viewer to get Facebook OpenGraph data.
+ */
+class LLFacebookConnect : public LLSingleton<LLFacebookConnect>
+{
+	LOG_CLASS(LLFacebookConnect);
+public:
+    enum EConnectionState
+	{
+		FB_NOT_CONNECTED = 0,
+		FB_CONNECTION_IN_PROGRESS = 1,
+		FB_CONNECTED = 2,
+		FB_CONNECTION_FAILED = 3,
+		FB_POSTING = 4,
+		FB_POSTED = 5,
+		FB_POST_FAILED = 6,
+		FB_DISCONNECTING = 7,
+		FB_DISCONNECT_FAILED = 8
+	};
+	
+	void connectToFacebook(const std::string& auth_code = "", const std::string& auth_state = "");	// Initiate the complete FB connection. Please use checkConnectionToFacebook() in normal use.
+	void disconnectFromFacebook();																	// Disconnect from the FBC service.
+    void checkConnectionToFacebook(bool auto_connect = false);										// Check if an access token is available on the FBC service. If not, call connectToFacebook().
+    
+	void loadFacebookInfo();
+    void loadFacebookFriends();
+	void postCheckin(const std::string& location, const std::string& name, const std::string& description, const std::string& picture, const std::string& message);
+    void sharePhoto(const std::string& image_url, const std::string& caption);
+	void sharePhoto(LLPointer<LLImageFormatted> image, const std::string& caption);
+	void updateStatus(const std::string& message);
+	
+	void storeInfo(const LLSD& info);
+	const LLSD& getInfo() const;
+	void clearInfo();
+	void storeContent(const LLSD& content);
+    const LLSD& getContent() const;
+	void clearContent();
+	void setDataDirty();
+    
+    void setConnectionState(EConnectionState connection_state);
+	void setConnected(bool connected);
+	bool isConnected() { return mConnected; }
+	bool isTransactionOngoing() { return ((mConnectionState == FB_CONNECTION_IN_PROGRESS) || (mConnectionState == FB_POSTING) || (mConnectionState == FB_DISCONNECTING)); }
+    EConnectionState getConnectionState() { return mConnectionState; }
+    
+    void openFacebookWeb(std::string url);
+
+private:
+	friend class LLSingleton<LLFacebookConnect>;
+
+	LLFacebookConnect();
+	~LLFacebookConnect() {};
+ 	std::string getFacebookConnectURL(const std::string& route = "", bool include_read_from_master = false);
+   
+    EConnectionState mConnectionState;
+	BOOL mConnected;
+	LLSD mInfo;
+    LLSD mContent;
+	bool mRefreshInfo;
+	bool mRefreshContent;
+	bool mReadFromMaster;
+	
+	static boost::scoped_ptr<LLEventPump> sStateWatcher;
+	static boost::scoped_ptr<LLEventPump> sInfoWatcher;
+	static boost::scoped_ptr<LLEventPump> sContentWatcher;
+};
+
+#endif // LL_LLFACEBOOKCONNECT_H