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diff --git a/indra/newview/llmutelist.h b/indra/newview/llmutelist.h
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+++ b/indra/newview/llmutelist.h
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+/** 
+ * @file llmutelist.h
+ * @brief Management of list of muted players
+ *
+ * Copyright (c) 2003-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_MUTELIST_H
+#define LL_MUTELIST_H
+
+#include "llstring.h"
+#include "lluuid.h"
+
+class LLViewerObject;
+class LLMessageSystem;
+class LLMuteListObserver;
+
+// An entry in the mute list.
+class LLMute
+{
+public:
+	// Legacy mutes are BY_NAME and have null UUID.
+	enum EType { BY_NAME = 0, AGENT = 1, OBJECT = 2, GROUP = 3, COUNT = 4 };
+	
+	LLMute(const LLUUID& id, const LLString& name = "", EType type = BY_NAME) 
+	: mID(id), mName(name), mType(type) { }
+
+	// Returns name + suffix based on type
+	// For example:  "James Tester (resident)"
+	LLString getDisplayName() const;
+	
+	// Converts a UI name into just the agent or object name
+	// For example: "James Tester (resident)" sets the name to "James Tester"
+	// and the type to AGENT.
+	void setFromDisplayName(const LLString& display_name);
+	
+public:
+	LLUUID		mID;	// agent or object id
+	LLString	mName;	// agent or object name
+	EType		mType;	// needed for UI display of existing mutes
+};
+
+class LLMuteList
+{
+public:
+	LLMuteList();
+	~LLMuteList();
+
+	void addObserver(LLMuteListObserver* observer);
+	void removeObserver(LLMuteListObserver* observer);
+
+	// Add either a normal or a BY_NAME mute.
+	BOOL add(const LLMute& mute);
+
+	// Remove both normal and legacy mutes.
+	BOOL remove(const LLMute& mute);
+	
+	// Name is required to test against legacy text-only mutes.
+	BOOL isMuted(const LLUUID& id, const LLString& name = LLString::null) const;
+	
+	BOOL isLinden(const LLString& name) const;
+	
+	BOOL isLoaded() const { return mIsLoaded; }
+
+	std::vector<LLMute> getMutes() const;
+	
+	// request the mute list
+	void requestFromServer(const LLUUID& agent_id);
+
+	// call this method on logout to save everything.
+	void cache(const LLUUID& agent_id);
+
+private:
+	BOOL loadFromFile(const LLString& filename);
+	BOOL saveToFile(const LLString& filename);
+
+	void setLoaded();
+	void notifyObservers();
+
+	void updateAdd(const LLMute& mute);
+	void updateRemove(const LLMute& mute);
+
+	// TODO: NULL out mute_id in database
+	static void processMuteListUpdate(LLMessageSystem* msg, void**);
+	static void processUseCachedMuteList(LLMessageSystem* msg, void**);
+
+	static void onFileMuteList(void** user_data, S32 code);
+
+private:
+	struct compare_by_name
+	{
+		bool operator()(const LLMute& a, const LLMute& b) const
+		{
+			return a.mName < b.mName;
+		}
+	};
+	struct compare_by_id
+	{
+		bool operator()(const LLMute& a, const LLMute& b) const
+		{
+			return a.mID < b.mID;
+		}
+	};
+	typedef std::set<LLMute, compare_by_id> mute_set_t;
+	mute_set_t mMutes;
+	
+	typedef std::set<LLString> string_set_t;
+	string_set_t mLegacyMutes;
+	
+	typedef std::set<LLMuteListObserver*> observer_set_t;
+	observer_set_t mObservers;
+
+	BOOL mIsLoaded;
+
+	friend class LLDispatchEmptyMuteList;
+};
+
+class LLMuteListObserver
+{
+public:
+	virtual ~LLMuteListObserver() { }
+	virtual void onChange() = 0;
+};
+
+extern LLMuteList *gMuteListp;
+
+#endif //LL_MUTELIST_H