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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 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
+	};
+
+	typedef boost::function<void(bool ok)> share_callback_t;
+	typedef boost::function<void()> content_updated_callback_t;
+
+	void connectToFacebook(const std::string& auth_code = "");  // Initiate the complete FB connection. Please use getConnectionToFacebook() in normal use.
+	void disconnectFromFacebook();                              // Disconnect from the FBC service.
+    void getConnectionToFacebook();                             // Check if an access token is available on the FBC service. If not, call connectToFacebook().
+    
+    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 setPostCheckinCallback(share_callback_t cb) { mPostCheckinCallback = cb; }
+	void setSharePhotoCallback(share_callback_t cb) { mSharePhotoCallback = cb; }
+	void setUpdateStatusCallback(share_callback_t cb) { mUpdateStatusCallback = cb; }
+	void setContentUpdatedCallback(content_updated_callback_t cb) { mContentUpdatedCallback = cb;}
+
+    void clearContent();
+	void storeContent(const LLSD& content);
+    const LLSD& getContent() const;
+    
+    void setConnectionState(EConnectionState connection_state) { mConnectionState = connection_state; }
+    bool isConnected() { return (mConnectionState == FB_CONNECTED); }
+    S32  generation() { return mGeneration; }
+    
+    void openFacebookWeb(std::string url);
+
+private:
+	friend class LLSingleton<LLFacebookConnect>;
+
+	LLFacebookConnect();
+	~LLFacebookConnect() {};
+ 	std::string getFacebookConnectURL(const std::string& route = "");
+   
+    EConnectionState mConnectionState;
+    LLSD mContent;
+    S32  mGeneration;
+	
+	share_callback_t mPostCheckinCallback;
+	share_callback_t mSharePhotoCallback;
+	share_callback_t mUpdateStatusCallback;
+	content_updated_callback_t mContentUpdatedCallback;
+};
+
+#endif // LL_LLFACEBOOKCONNECT_H