/** 
 * @file llavatarname.h
 * @brief Represents name-related data for an avatar, such as the
 * username/SLID ("bobsmith123" or "james.linden") and the display
 * name ("James Cook")
 *
 * $LicenseInfo:firstyear=2010&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, 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 LLAVATARNAME_H
#define LLAVATARNAME_H

#include <string>

class LLSD;

class LL_COMMON_API LLAvatarName
{
public:
	LLAvatarName();
	
	bool operator<(const LLAvatarName& rhs) const;

	// Conversion to and from LLSD (cache file or server response)
	LLSD asLLSD() const;
	void fromLLSD(const LLSD& sd);

	// Used only in legacy mode when the display name capability is not provided server side
	// or to otherwise create a temporary valid item.
	void fromString(const std::string& full_name);
	
	// Set the name object to become invalid in "expires" seconds from now
	void setExpires(F64 expires);

	// Set and get the display name flag set by the user in preferences.
	static void setUseDisplayNames(bool use);
	static bool useDisplayNames();
	
	static void setUseUsernames(bool use);
	static bool useUsernames();

	// A name object is valid if not temporary and not yet expired (default is expiration not checked)
	bool isValidName(F64 max_unrefreshed = 0.0f) const { return !mIsTemporaryName && (mExpires >= max_unrefreshed); }
	
	// Return true if the name is made up from legacy or temporary data
	bool isDisplayNameDefault() const { return mIsDisplayNameDefault; }
	
	// For normal names, returns "James Linden (james.linden)"
	// When display names are disabled returns just "James Linden"
	std::string getCompleteName(bool use_parentheses = true, bool force_use_display_name = false) const;
	
	// Returns "James Linden" or "bobsmith123 Resident" for backwards
	// compatibility with systems like voice and muting
	// *TODO: Eliminate this in favor of username only
	std::string getLegacyName() const;
	
	// "José Sanchez" or "James Linden", UTF-8 encoded Unicode
	// Takes the display name preference into account. This is truly the name that should 
	// be used for all UI where an avatar name has to be used unless we truly want something else (rare)
	std::string getDisplayName(bool force_use_display_name = false) const;
	
	// Returns "James Linden" or "bobsmith123 Resident"
	// Used where we explicitely prefer or need a non UTF-8 legacy (ASCII) name
	// Also used for backwards compatibility with systems like voice and muting
	std::string getUserName(bool lowercase = false) const;
	
	// Returns "james.linden" or the legacy name for very old names
	std::string getAccountName() const { return mUsername; }

	// Debug print of the object
	void dump() const;
	
	// Names can change, so need to keep track of when name was
	// last checked.
	// Unix time-from-epoch seconds for efficiency
	F64 mExpires;
	
	// You can only change your name every N hours, so record
	// when the next update is allowed
	// Unix time-from-epoch seconds
	F64 mNextUpdate;
	
private:
	// "bobsmith123" or "james.linden", US-ASCII only
	std::string mUsername;

	// "José Sanchez" or "James Linden", UTF-8 encoded Unicode
	// Contains data whether or not user has explicitly set
	// a display name; may duplicate their username.
	std::string mDisplayName;

	// For "James Linden", "James"
	// For "bobsmith123", "bobsmith123"
	// Used to communicate with legacy systems like voice and muting which
	// rely on old-style names.
	// *TODO: Eliminate this in favor of username only
	std::string mLegacyFirstName;

	// For "James Linden", "Linden"
	// For "bobsmith123", "Resident"
	// see above for rationale
	std::string mLegacyLastName;

	// If true, both display name and SLID were generated from
	// a legacy first and last name, like "James Linden (james.linden)"
	bool mIsDisplayNameDefault;

	// Under error conditions, we may insert "dummy" records with
	// names like "???" into caches as placeholders.  These can be
	// shown in UI, but are not serialized.
	bool mIsTemporaryName;

	// Global flag indicating if display name should be used or not
	// This will affect the output of the high level "get" methods
	static bool sUseDisplayNames;

	// Flag indicating if username should be shown after display name or not
	static bool sUseUsernames;
};

#endif