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/**
* @file llavatarnamecache.h
* @brief Provides lookup of avatar SLIDs ("bobsmith123") and display names
* ("James Cook") from avatar UUIDs.
*
* $LicenseInfo:firstyear=2010&license=viewergpl$
*
* Copyright (c) 2010, 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 LLAVATARNAMECACHE_H
#define LLAVATARNAMECACHE_H
#include "llavatarname.h" // for convenience
#include <boost/signals2.hpp>
class LLSD;
class LLUUID;
namespace LLAvatarNameCache
{
// Until the cache is set running, immediate lookups will fail and
// async lookups will be queued. This allows us to block requests
// until we know if the first region supports display names.
void initClass(bool running);
void cleanupClass();
void importFile(std::istream& istr);
void exportFile(std::ostream& ostr);
// On the viewer, usually a simulator capabilitity
// If empty, name cache will fall back to using legacy name
// lookup system
void setNameLookupURL(const std::string& name_lookup_url);
// Do we have a valid lookup URL, hence are we trying to use the
// new display name lookup system?
bool hasNameLookupURL();
// Periodically makes a batch request for display names not already in
// cache. Call once per frame.
void idle();
// If name is in cache, returns true and fills in provided LLAvatarName
// otherwise returns false
bool get(const LLUUID& agent_id, LLAvatarName *av_name);
// Callback types for get() below
typedef boost::signals2::signal<
void (const LLUUID& agent_id, const LLAvatarName& av_name)>
callback_signal_t;
typedef callback_signal_t::slot_type callback_slot_t;
// Fetches name information and calls callback.
// If name information is in cache, callback will be called immediately.
void get(const LLUUID& agent_id, callback_slot_t slot);
// Allow display names to be explicitly disabled for testing.
void setUseDisplayNames(bool use);
bool useDisplayNames();
void erase(const LLUUID& agent_id);
// Force a re-fetch of the most recent data, but keep the current
// data in cache
void fetch(const LLUUID& agent_id);
void insert(const LLUUID& agent_id, const LLAvatarName& av_name);
// Compute name expiration time from HTTP Cache-Control header,
// or return default value, in seconds from epoch.
F64 nameExpirationFromHeaders(LLSD headers);
}
// Parse a cache-control header to get the max-age delta-seconds.
// Returns true if header has max-age param and it parses correctly.
// Exported here to ease unit testing.
bool max_age_from_cache_control(const std::string& cache_control, S32 *max_age);
#endif
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