/** 
 * @file llspeakers.cpp
 * @brief Management interface for muting and controlling volume of residents currently speaking
 *
 * $LicenseInfo:firstyear=2005&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llspeakers.h"

#include "llagent.h"
#include "llappviewer.h"
#include "llimview.h"
#include "llsdutil.h"
#include "lluicolortable.h"
#include "llviewerobjectlist.h"
#include "llvoavatar.h"
#include "llworld.h"

const LLColor4 INACTIVE_COLOR(0.3f, 0.3f, 0.3f, 0.5f);
const LLColor4 ACTIVE_COLOR(0.5f, 0.5f, 0.5f, 1.f);

LLSpeaker::LLSpeaker(const LLUUID& id, const std::string& name, const ESpeakerType type) : 
	mStatus(LLSpeaker::STATUS_TEXT_ONLY),
	mLastSpokeTime(0.f), 
	mSpeechVolume(0.f), 
	mHasSpoken(FALSE),
	mHasLeftCurrentCall(FALSE),
	mDotColor(LLColor4::white),
	mID(id),
	mTyping(FALSE),
	mSortIndex(0),
	mType(type),
	mIsModerator(FALSE),
	mModeratorMutedVoice(FALSE),
	mModeratorMutedText(FALSE)
{
	if (name.empty() && type == SPEAKER_AGENT)
	{
		lookupName();
	}
	else
	{
		mDisplayName = name;
	}
}


void LLSpeaker::lookupName()
{
	if (mDisplayName.empty())
	{
		gCacheName->get(mID, false, boost::bind(&LLSpeaker::onNameCache, this, _1, _2, _3));
	}
}

void LLSpeaker::onNameCache(const LLUUID& id, const std::string& full_name, bool is_group)
{
	mDisplayName = full_name;
}

bool LLSpeaker::isInVoiceChannel()
{
	return mStatus <= LLSpeaker::STATUS_VOICE_ACTIVE || mStatus == LLSpeaker::STATUS_MUTED;
}

LLSpeakerUpdateSpeakerEvent::LLSpeakerUpdateSpeakerEvent(LLSpeaker* source)
: LLEvent(source, "Speaker update speaker event"),
mSpeakerID (source->mID)
{
}

LLSD LLSpeakerUpdateSpeakerEvent::getValue()
{
	LLSD ret;
	ret["id"] = mSpeakerID;
	return ret;
}

LLSpeakerUpdateModeratorEvent::LLSpeakerUpdateModeratorEvent(LLSpeaker* source)
: LLEvent(source, "Speaker add moderator event"),
  mSpeakerID (source->mID),
  mIsModerator (source->mIsModerator)
{
}

LLSD LLSpeakerUpdateModeratorEvent::getValue()
{
	LLSD ret;
	ret["id"] = mSpeakerID;
	ret["is_moderator"] = mIsModerator;
	return ret;
}

LLSpeakerTextModerationEvent::LLSpeakerTextModerationEvent(LLSpeaker* source)
: LLEvent(source, "Speaker text moderation event")
{
}

LLSD LLSpeakerTextModerationEvent::getValue()
{
	return std::string("text");
}


LLSpeakerVoiceModerationEvent::LLSpeakerVoiceModerationEvent(LLSpeaker* source)
: LLEvent(source, "Speaker voice moderation event")
{
}

LLSD LLSpeakerVoiceModerationEvent::getValue()
{
	return std::string("voice");
}

LLSpeakerListChangeEvent::LLSpeakerListChangeEvent(LLSpeakerMgr* source, const LLUUID& speaker_id)
: LLEvent(source, "Speaker added/removed from speaker mgr"),
  mSpeakerID(speaker_id)
{
}

LLSD LLSpeakerListChangeEvent::getValue()
{
	return mSpeakerID;
}

// helper sort class
struct LLSortRecentSpeakers
{
	bool operator()(const LLPointer<LLSpeaker> lhs, const LLPointer<LLSpeaker> rhs) const;
};

bool LLSortRecentSpeakers::operator()(const LLPointer<LLSpeaker> lhs, const LLPointer<LLSpeaker> rhs) const
{
	// Sort first on status
	if (lhs->mStatus != rhs->mStatus) 
	{
		return (lhs->mStatus < rhs->mStatus);
	}

	// and then on last speaking time
	if(lhs->mLastSpokeTime != rhs->mLastSpokeTime)
	{
		return (lhs->mLastSpokeTime > rhs->mLastSpokeTime);
	}
	
	// and finally (only if those are both equal), on name.
	return(	lhs->mDisplayName.compare(rhs->mDisplayName) < 0 );
}

LLSpeakerActionTimer::LLSpeakerActionTimer(action_callback_t action_cb, F32 action_period, const LLUUID& speaker_id)
: LLEventTimer(action_period)
, mActionCallback(action_cb)
, mSpeakerId(speaker_id)
{
}

BOOL LLSpeakerActionTimer::tick()
{
	if (mActionCallback)
	{
		return (BOOL)mActionCallback(mSpeakerId);
	}
	return TRUE;
}

void LLSpeakerActionTimer::unset()
{
	mActionCallback = 0;
}

LLSpeakersDelayActionsStorage::LLSpeakersDelayActionsStorage(LLSpeakerActionTimer::action_callback_t action_cb, F32 action_delay)
: mActionCallback(action_cb)
, mActionDelay(action_delay)
{
}

LLSpeakersDelayActionsStorage::~LLSpeakersDelayActionsStorage()
{
	removeAllTimers();
}

void LLSpeakersDelayActionsStorage::setActionTimer(const LLUUID& speaker_id)
{
	bool not_found = true;
	if (mActionTimersMap.size() > 0)
	{
		not_found = mActionTimersMap.find(speaker_id) == mActionTimersMap.end();
	}

	// If there is already a started timer for the passed UUID don't do anything.
	if (not_found)
	{
		// Starting a timer to remove an participant after delay is completed
		mActionTimersMap.insert(LLSpeakerActionTimer::action_value_t(speaker_id,
			new LLSpeakerActionTimer(
				boost::bind(&LLSpeakersDelayActionsStorage::onTimerActionCallback, this, _1),
				mActionDelay, speaker_id)));
	}
}

void LLSpeakersDelayActionsStorage::unsetActionTimer(const LLUUID& speaker_id)
{
	if (mActionTimersMap.size() == 0) return;

	LLSpeakerActionTimer::action_timer_iter_t it_speaker = mActionTimersMap.find(speaker_id);

	if (it_speaker != mActionTimersMap.end())
	{
		it_speaker->second->unset();
		mActionTimersMap.erase(it_speaker);
	}
}

void LLSpeakersDelayActionsStorage::removeAllTimers()
{
	LLSpeakerActionTimer::action_timer_iter_t iter = mActionTimersMap.begin();
	for (; iter != mActionTimersMap.end(); ++iter)
	{
		delete iter->second;
	}
	mActionTimersMap.clear();
}

bool LLSpeakersDelayActionsStorage::onTimerActionCallback(const LLUUID& speaker_id)
{
	unsetActionTimer(speaker_id);

	if (mActionCallback)
	{
		mActionCallback(speaker_id);
	}

	return true;
}


//
// LLSpeakerMgr
//

LLSpeakerMgr::LLSpeakerMgr(LLVoiceChannel* channelp) : 
	mVoiceChannel(channelp)
, mVoiceModerated(false)
, mModerateModeHandledFirstTime(false)
{
	static LLUICachedControl<F32> remove_delay ("SpeakerParticipantRemoveDelay", 10.0);

	mSpeakerDelayRemover = new LLSpeakersDelayActionsStorage(boost::bind(&LLSpeakerMgr::removeSpeaker, this, _1), remove_delay);
}

LLSpeakerMgr::~LLSpeakerMgr()
{
	delete mSpeakerDelayRemover;
}

LLPointer<LLSpeaker> LLSpeakerMgr::setSpeaker(const LLUUID& id, const std::string& name, LLSpeaker::ESpeakerStatus status, LLSpeaker::ESpeakerType type)
{
	if (id.isNull()) return NULL;

	LLPointer<LLSpeaker> speakerp;
	if (mSpeakers.find(id) == mSpeakers.end())
	{
		speakerp = new LLSpeaker(id, name, type);
		speakerp->mStatus = status;
		mSpeakers.insert(std::make_pair(speakerp->mID, speakerp));
		mSpeakersSorted.push_back(speakerp);
		LL_DEBUGS("Speakers") << "Added speaker " << id << llendl;
		fireEvent(new LLSpeakerListChangeEvent(this, speakerp->mID), "add");
	}
	else
	{
		speakerp = findSpeaker(id);
		if (speakerp.notNull())
		{
			// keep highest priority status (lowest value) instead of overriding current value
			speakerp->mStatus = llmin(speakerp->mStatus, status);
			// RN: due to a weird behavior where IMs from attached objects come from the wearer's agent_id
			// we need to override speakers that we think are objects when we find out they are really
			// residents
			if (type == LLSpeaker::SPEAKER_AGENT)
			{
				speakerp->mType = LLSpeaker::SPEAKER_AGENT;
				speakerp->lookupName();
			}
		}
		else
		{
			LL_WARNS("Speakers") << "Speaker " << id << " not found" << llendl;
		}
	}

	mSpeakerDelayRemover->unsetActionTimer(speakerp->mID);
	return speakerp;
}

// *TODO: Once way to request the current voice channel moderation mode is implemented
// this method with related code should be removed.
/*
 Initializes "moderate_mode" of voice session on first join.
 
 This is WORKAROUND because a way to request the current voice channel moderation mode exists
 but is not implemented in viewer yet. See EXT-6937.
*/
void LLSpeakerMgr::initVoiceModerateMode()
{
	if (!mModerateModeHandledFirstTime && (mVoiceChannel && mVoiceChannel->isActive()))
	{
		LLPointer<LLSpeaker> speakerp;

		if (mSpeakers.find(gAgentID) != mSpeakers.end())
		{
			speakerp = mSpeakers[gAgentID];
		}

		if (speakerp.notNull())
		{
			mVoiceModerated = speakerp->mModeratorMutedVoice;
			mModerateModeHandledFirstTime = true;
		}
	}
}

void LLSpeakerMgr::update(BOOL resort_ok)
{
	if (!LLVoiceClient::getInstance())
	{
		return;
	}
	
	LLColor4 speaking_color = LLUIColorTable::instance().getColor("SpeakingColor");
	LLColor4 overdriven_color = LLUIColorTable::instance().getColor("OverdrivenColor");

	if(resort_ok) // only allow list changes when user is not interacting with it
	{
		updateSpeakerList();
	}

	// update status of all current speakers
	BOOL voice_channel_active = (!mVoiceChannel && LLVoiceClient::getInstance()->inProximalChannel()) || (mVoiceChannel && mVoiceChannel->isActive());
	for (speaker_map_t::iterator speaker_it = mSpeakers.begin(); speaker_it != mSpeakers.end();)
	{
		LLUUID speaker_id = speaker_it->first;
		LLSpeaker* speakerp = speaker_it->second;
		
		speaker_map_t::iterator  cur_speaker_it = speaker_it++;

		if (voice_channel_active && LLVoiceClient::getInstance()->getVoiceEnabled(speaker_id))
		{
			speakerp->mSpeechVolume = LLVoiceClient::getInstance()->getCurrentPower(speaker_id);
			BOOL moderator_muted_voice = LLVoiceClient::getInstance()->getIsModeratorMuted(speaker_id);
			if (moderator_muted_voice != speakerp->mModeratorMutedVoice)
			{
				speakerp->mModeratorMutedVoice = moderator_muted_voice;
				LL_DEBUGS("Speakers") << (speakerp->mModeratorMutedVoice? "Muted" : "Umuted") << " speaker " << speaker_id<< llendl;
				speakerp->fireEvent(new LLSpeakerVoiceModerationEvent(speakerp));
			}

			if (LLVoiceClient::getInstance()->getOnMuteList(speaker_id) || speakerp->mModeratorMutedVoice)
			{
				speakerp->mStatus = LLSpeaker::STATUS_MUTED;
			}
			else if (LLVoiceClient::getInstance()->getIsSpeaking(speaker_id))
			{
				// reset inactivity expiration
				if (speakerp->mStatus != LLSpeaker::STATUS_SPEAKING)
				{
					speakerp->mLastSpokeTime = mSpeechTimer.getElapsedTimeF32();
					speakerp->mHasSpoken = TRUE;
					llinfos << "Merov debug : LLSpeakerMgr::update, session = " << getSessionID() << ", uuid = " << speaker_id << ", date = " << LLFrameTimer::getElapsedSeconds() << llendl;
					speakerp->fireEvent(new LLSpeakerUpdateSpeakerEvent(speakerp), "update_speaker");
				}
				speakerp->mStatus = LLSpeaker::STATUS_SPEAKING;
				// interpolate between active color and full speaking color based on power of speech output
				speakerp->mDotColor = speaking_color;
				if (speakerp->mSpeechVolume > LLVoiceClient::OVERDRIVEN_POWER_LEVEL)
				{
					speakerp->mDotColor = overdriven_color;
				}
			}
			else
			{
				speakerp->mSpeechVolume = 0.f;
				speakerp->mDotColor = ACTIVE_COLOR;

				if (speakerp->mHasSpoken)
				{
					// have spoken once, not currently speaking
					speakerp->mStatus = LLSpeaker::STATUS_HAS_SPOKEN;
				}
				else
				{
					// default state for being in voice channel
					speakerp->mStatus = LLSpeaker::STATUS_VOICE_ACTIVE;
				}
			}
		}
		// speaker no longer registered in voice channel, demote to text only
		else if (speakerp->mStatus != LLSpeaker::STATUS_NOT_IN_CHANNEL)
		{
			if(speakerp->mType == LLSpeaker::SPEAKER_EXTERNAL)
			{
				// external speakers should be timed out when they leave the voice channel (since they only exist via SLVoice)
				speakerp->mStatus = LLSpeaker::STATUS_NOT_IN_CHANNEL;
			}
			else
			{
				speakerp->mStatus = LLSpeaker::STATUS_TEXT_ONLY;
				speakerp->mSpeechVolume = 0.f;
				speakerp->mDotColor = ACTIVE_COLOR;
			}
		}
	}

	if(resort_ok)  // only allow list changes when user is not interacting with it
	{
		// sort by status then time last spoken
		std::sort(mSpeakersSorted.begin(), mSpeakersSorted.end(), LLSortRecentSpeakers());
	}

	// for recent speakers who are not currently speaking, show "recent" color dot for most recent
	// fading to "active" color

	S32 recent_speaker_count = 0;
	S32 sort_index = 0;
	speaker_list_t::iterator sorted_speaker_it;
	for(sorted_speaker_it = mSpeakersSorted.begin(); 
		sorted_speaker_it != mSpeakersSorted.end(); ++sorted_speaker_it)
	{
		LLPointer<LLSpeaker> speakerp = *sorted_speaker_it;
		
		// color code recent speakers who are not currently speaking
		if (speakerp->mStatus == LLSpeaker::STATUS_HAS_SPOKEN)
		{
			speakerp->mDotColor = lerp(speaking_color, ACTIVE_COLOR, clamp_rescale((F32)recent_speaker_count, -2.f, 3.f, 0.f, 1.f));
			recent_speaker_count++;
		}

		// stuff sort ordinal into speaker so the ui can sort by this value
		speakerp->mSortIndex = sort_index++;
	}
}

void LLSpeakerMgr::updateSpeakerList()
{
	// are we bound to the currently active voice channel?
	if ((!mVoiceChannel && LLVoiceClient::getInstance()->inProximalChannel()) || (mVoiceChannel && mVoiceChannel->isActive()))
	{
	        std::set<LLUUID> participants;
	        LLVoiceClient::getInstance()->getParticipantList(participants);
		// add new participants to our list of known speakers
		for (std::set<LLUUID>::iterator participant_it = participants.begin();
			 participant_it != participants.end(); 
			 ++participant_it)
		{
				setSpeaker(*participant_it, 
						   LLVoiceClient::getInstance()->getDisplayName(*participant_it),
						   LLSpeaker::STATUS_VOICE_ACTIVE, 
						   (LLVoiceClient::getInstance()->isParticipantAvatar(*participant_it)?LLSpeaker::SPEAKER_AGENT:LLSpeaker::SPEAKER_EXTERNAL));


		}
	}
}

void LLSpeakerMgr::setSpeakerNotInChannel(LLSpeaker* speakerp)
{
	speakerp->mStatus = LLSpeaker::STATUS_NOT_IN_CHANNEL;
	speakerp->mDotColor = INACTIVE_COLOR;
	mSpeakerDelayRemover->setActionTimer(speakerp->mID);
}

bool LLSpeakerMgr::removeSpeaker(const LLUUID& speaker_id)
{
	mSpeakers.erase(speaker_id);

	speaker_list_t::iterator sorted_speaker_it = mSpeakersSorted.begin();
	
	for(; sorted_speaker_it != mSpeakersSorted.end(); ++sorted_speaker_it)
	{
		if (speaker_id == (*sorted_speaker_it)->mID)
		{
			mSpeakersSorted.erase(sorted_speaker_it);
			break;
		}
	}

	LL_DEBUGS("Speakers") << "Removed speaker " << speaker_id << llendl;
	fireEvent(new LLSpeakerListChangeEvent(this, speaker_id), "remove");

	update(TRUE);

	return false;
}

LLPointer<LLSpeaker> LLSpeakerMgr::findSpeaker(const LLUUID& speaker_id)
{
	//In some conditions map causes crash if it is empty(Windows only), adding check (EK)
	if (mSpeakers.size() == 0)
		return NULL;
	speaker_map_t::iterator found_it = mSpeakers.find(speaker_id);
	if (found_it == mSpeakers.end())
	{
		return NULL;
	}
	return found_it->second;
}

void LLSpeakerMgr::getSpeakerList(speaker_list_t* speaker_list, BOOL include_text)
{
	speaker_list->clear();
	for (speaker_map_t::iterator speaker_it = mSpeakers.begin(); speaker_it != mSpeakers.end(); ++speaker_it)
	{
		LLPointer<LLSpeaker> speakerp = speaker_it->second;
		// what about text only muted or inactive?
		if (include_text || speakerp->mStatus != LLSpeaker::STATUS_TEXT_ONLY)
		{
			speaker_list->push_back(speakerp);
		}
	}
}

const LLUUID LLSpeakerMgr::getSessionID() 
{ 
	return mVoiceChannel->getSessionID(); 
}


void LLSpeakerMgr::setSpeakerTyping(const LLUUID& speaker_id, BOOL typing)
{
	LLPointer<LLSpeaker> speakerp = findSpeaker(speaker_id);
	if (speakerp.notNull())
	{
		speakerp->mTyping = typing;
	}
}

// speaker has chatted via either text or voice
void LLSpeakerMgr::speakerChatted(const LLUUID& speaker_id)
{
	LLPointer<LLSpeaker> speakerp = findSpeaker(speaker_id);
	if (speakerp.notNull())
	{
		speakerp->mLastSpokeTime = mSpeechTimer.getElapsedTimeF32();
		speakerp->mHasSpoken = TRUE;
		llinfos << "Merov debug : LLSpeakerMgr::speakerChatted, session = " << getSessionID() << ", uuid = " << speaker_id << ", date = " << LLFrameTimer::getElapsedSeconds() << llendl;
		speakerp->fireEvent(new LLSpeakerUpdateSpeakerEvent(speakerp), "update_speaker");
	}
}

BOOL LLSpeakerMgr::isVoiceActive()
{
	// mVoiceChannel = NULL means current voice channel, whatever it is
	return LLVoiceClient::getInstance()->voiceEnabled() && mVoiceChannel && mVoiceChannel->isActive();
}


//
// LLIMSpeakerMgr
//
LLIMSpeakerMgr::LLIMSpeakerMgr(LLVoiceChannel* channel) : LLSpeakerMgr(channel)
{
}

void LLIMSpeakerMgr::updateSpeakerList()
{
	// don't do normal updates which are pulled from voice channel
	// rely on user list reported by sim
	
	// We need to do this to allow PSTN callers into group chats to show in the list.
	LLSpeakerMgr::updateSpeakerList();
	
	return;
}

void LLIMSpeakerMgr::setSpeakers(const LLSD& speakers)
{
	if ( !speakers.isMap() ) return;

	if ( speakers.has("agent_info") && speakers["agent_info"].isMap() )
	{
		LLSD::map_const_iterator speaker_it;
		for(speaker_it = speakers["agent_info"].beginMap();
			speaker_it != speakers["agent_info"].endMap();
			++speaker_it)
		{
			LLUUID agent_id(speaker_it->first);

			LLPointer<LLSpeaker> speakerp = setSpeaker(
				agent_id,
				LLStringUtil::null,
				LLSpeaker::STATUS_TEXT_ONLY);

			if ( speaker_it->second.isMap() )
			{
				BOOL is_moderator = speakerp->mIsModerator;
				speakerp->mIsModerator = speaker_it->second["is_moderator"];
				speakerp->mModeratorMutedText =
					speaker_it->second["mutes"]["text"];
				// Fire event only if moderator changed
				if ( is_moderator != speakerp->mIsModerator )
				{
					LL_DEBUGS("Speakers") << "Speaker " << agent_id << (is_moderator ? "is now" : "no longer is") << " a moderator" << llendl;
					fireEvent(new LLSpeakerUpdateModeratorEvent(speakerp), "update_moderator");
				}
			}
		}
	}
	else if ( speakers.has("agents" ) && speakers["agents"].isArray() )
	{
		//older, more decprecated way.  Need here for
		//using older version of servers
		LLSD::array_const_iterator speaker_it;
		for(speaker_it = speakers["agents"].beginArray();
			speaker_it != speakers["agents"].endArray();
			++speaker_it)
		{
			const LLUUID agent_id = (*speaker_it).asUUID();

			LLPointer<LLSpeaker> speakerp = setSpeaker(
				agent_id,
				LLStringUtil::null,
				LLSpeaker::STATUS_TEXT_ONLY);
		}
	}
}

void LLIMSpeakerMgr::updateSpeakers(const LLSD& update)
{
	if ( !update.isMap() ) return;

	if ( update.has("agent_updates") && update["agent_updates"].isMap() )
	{
		LLSD::map_const_iterator update_it;
		for(
			update_it = update["agent_updates"].beginMap();
			update_it != update["agent_updates"].endMap();
			++update_it)
		{
			LLUUID agent_id(update_it->first);
			LLPointer<LLSpeaker> speakerp = findSpeaker(agent_id);

			LLSD agent_data = update_it->second;

			if (agent_data.isMap() && agent_data.has("transition"))
			{
				if (agent_data["transition"].asString() == "LEAVE" && speakerp.notNull())
				{
					setSpeakerNotInChannel(speakerp);
				}
				else if (agent_data["transition"].asString() == "ENTER")
				{
					// add or update speaker
					speakerp = setSpeaker(agent_id);
				}
				else
				{
					llwarns << "bad membership list update " << ll_print_sd(agent_data["transition"]) << llendl;
				}
			}

			if (speakerp.isNull()) continue;

			// should have a valid speaker from this point on
			if (agent_data.isMap() && agent_data.has("info"))
			{
				LLSD agent_info = agent_data["info"];

				if (agent_info.has("is_moderator"))
				{
					BOOL is_moderator = speakerp->mIsModerator;
					speakerp->mIsModerator = agent_info["is_moderator"];
					// Fire event only if moderator changed
					if ( is_moderator != speakerp->mIsModerator )
					{
						LL_DEBUGS("Speakers") << "Speaker " << agent_id << (is_moderator ? "is now" : "no longer is") << " a moderator" << llendl;
						fireEvent(new LLSpeakerUpdateModeratorEvent(speakerp), "update_moderator");
					}
				}

				if (agent_info.has("mutes"))
				{
					speakerp->mModeratorMutedText = agent_info["mutes"]["text"];
				}
			}
		}
	}
	else if ( update.has("updates") && update["updates"].isMap() )
	{
		LLSD::map_const_iterator update_it;
		for (
			update_it = update["updates"].beginMap();
			update_it != update["updates"].endMap();
			++update_it)
		{
			LLUUID agent_id(update_it->first);
			LLPointer<LLSpeaker> speakerp = findSpeaker(agent_id);

			std::string agent_transition = update_it->second.asString();
			if (agent_transition == "LEAVE" && speakerp.notNull())
			{
				setSpeakerNotInChannel(speakerp);
			}
			else if ( agent_transition == "ENTER")
			{
				// add or update speaker
				speakerp = setSpeaker(agent_id);
			}
			else
			{
				llwarns << "bad membership list update "
						<< agent_transition << llendl;
			}
		}
	}
}

class ModerationResponder : public LLHTTPClient::Responder
{
public:
	ModerationResponder(const LLUUID& session_id)
	{
		mSessionID = session_id;
	}

	virtual void error(U32 status, const std::string& reason)
	{
		llwarns << status << ": " << reason << llendl;

		if ( gIMMgr )
		{
			//403 == you're not a mod
			//should be disabled if you're not a moderator
			if ( 403 == status )
			{
				gIMMgr->showSessionEventError(
					"mute",
					"not_a_mod_error",
					mSessionID);
			}
			else
			{
				gIMMgr->showSessionEventError(
					"mute",
					"generic_request_error",
					mSessionID);
			}
		}
	}

private:
	LLUUID mSessionID;
};

void LLIMSpeakerMgr::toggleAllowTextChat(const LLUUID& speaker_id)
{
	LLPointer<LLSpeaker> speakerp = findSpeaker(speaker_id);
	if (!speakerp) return;

	std::string url = gAgent.getRegion()->getCapability("ChatSessionRequest");
	LLSD data;
	data["method"] = "mute update";
	data["session-id"] = getSessionID();
	data["params"] = LLSD::emptyMap();
	data["params"]["agent_id"] = speaker_id;
	data["params"]["mute_info"] = LLSD::emptyMap();
	//current value represents ability to type, so invert
	data["params"]["mute_info"]["text"] = !speakerp->mModeratorMutedText;

	LLHTTPClient::post(url, data, new ModerationResponder(getSessionID()));
}

void LLIMSpeakerMgr::moderateVoiceParticipant(const LLUUID& avatar_id, bool unmute)
{
	LLPointer<LLSpeaker> speakerp = findSpeaker(avatar_id);
	if (!speakerp) return;

	// *NOTE: mantipov: probably this condition will be incorrect when avatar will be blocked for
	// text chat via moderation (LLSpeaker::mModeratorMutedText == TRUE)
	bool is_in_voice = speakerp->mStatus <= LLSpeaker::STATUS_VOICE_ACTIVE || speakerp->mStatus == LLSpeaker::STATUS_MUTED;

	// do not send voice moderation changes for avatars not in voice channel
	if (!is_in_voice) return;

	std::string url = gAgent.getRegion()->getCapability("ChatSessionRequest");
	LLSD data;
	data["method"] = "mute update";
	data["session-id"] = getSessionID();
	data["params"] = LLSD::emptyMap();
	data["params"]["agent_id"] = avatar_id;
	data["params"]["mute_info"] = LLSD::emptyMap();
	data["params"]["mute_info"]["voice"] = !unmute;

	LLHTTPClient::post(
		url,
		data,
		new ModerationResponder(getSessionID()));
}

void LLIMSpeakerMgr::moderateVoiceAllParticipants( bool unmute_everyone )
{
	if (mVoiceModerated == !unmute_everyone)
	{
		// session already in requested state. Just force participants which do not match it.
		forceVoiceModeratedMode(mVoiceModerated);
	}
	else
	{
		// otherwise set moderated mode for a whole session.
		moderateVoiceSession(getSessionID(), !unmute_everyone);
	}
}

void LLIMSpeakerMgr::processSessionUpdate(const LLSD& session_update)
{
	if (session_update.has("moderated_mode") &&
		session_update["moderated_mode"].has("voice"))
	{
		mVoiceModerated = session_update["moderated_mode"]["voice"];
	}
}

void LLIMSpeakerMgr::moderateVoiceSession(const LLUUID& session_id, bool disallow_voice)
{
	std::string url = gAgent.getRegion()->getCapability("ChatSessionRequest");
	LLSD data;
	data["method"] = "session update";
	data["session-id"] = session_id;
	data["params"] = LLSD::emptyMap();

	data["params"]["update_info"] = LLSD::emptyMap();

	data["params"]["update_info"]["moderated_mode"] = LLSD::emptyMap();
	data["params"]["update_info"]["moderated_mode"]["voice"] = disallow_voice;

	LLHTTPClient::post(url, data, new ModerationResponder(session_id));
}

void LLIMSpeakerMgr::forceVoiceModeratedMode(bool should_be_muted)
{
	for (speaker_map_t::iterator speaker_it = mSpeakers.begin(); speaker_it != mSpeakers.end(); ++speaker_it)
	{
		LLUUID speaker_id = speaker_it->first;
		LLSpeaker* speakerp = speaker_it->second;

		// participant does not match requested state
		if (should_be_muted != (bool)speakerp->mModeratorMutedVoice)
		{
			moderateVoiceParticipant(speaker_id, !should_be_muted);
		}
	}
}

//
// LLActiveSpeakerMgr
//

LLActiveSpeakerMgr::LLActiveSpeakerMgr() : LLSpeakerMgr(NULL)
{
}

void LLActiveSpeakerMgr::updateSpeakerList()
{
	// point to whatever the current voice channel is
	mVoiceChannel = LLVoiceChannel::getCurrentVoiceChannel();

	// always populate from active voice channel
	if (LLVoiceChannel::getCurrentVoiceChannel() != mVoiceChannel) //MA: seems this is always false
	{
		LL_DEBUGS("Speakers") << "Removed all speakers" << llendl;
		fireEvent(new LLSpeakerListChangeEvent(this, LLUUID::null), "clear");
		mSpeakers.clear();
		mSpeakersSorted.clear();
		mVoiceChannel = LLVoiceChannel::getCurrentVoiceChannel();
		mSpeakerDelayRemover->removeAllTimers();
	}
	LLSpeakerMgr::updateSpeakerList();

	// clean up text only speakers
	for (speaker_map_t::iterator speaker_it = mSpeakers.begin(); speaker_it != mSpeakers.end(); ++speaker_it)
	{
		LLUUID speaker_id = speaker_it->first;
		LLSpeaker* speakerp = speaker_it->second;
		if (speakerp->mStatus == LLSpeaker::STATUS_TEXT_ONLY)
		{
			// automatically flag text only speakers for removal
			speakerp->mStatus = LLSpeaker::STATUS_NOT_IN_CHANNEL;
		}
	}

}



//
// LLLocalSpeakerMgr
//

LLLocalSpeakerMgr::LLLocalSpeakerMgr() : LLSpeakerMgr(LLVoiceChannelProximal::getInstance())
{
}

LLLocalSpeakerMgr::~LLLocalSpeakerMgr ()
{
}

void LLLocalSpeakerMgr::updateSpeakerList()
{
	// pull speakers from voice channel
	LLSpeakerMgr::updateSpeakerList();

	if (gDisconnected)//the world is cleared.
	{
		return ;
	}

	// pick up non-voice speakers in chat range
	uuid_vec_t avatar_ids;
	std::vector<LLVector3d> positions;
	LLWorld::getInstance()->getAvatars(&avatar_ids, &positions, gAgent.getPositionGlobal(), CHAT_NORMAL_RADIUS);
	for(U32 i=0; i<avatar_ids.size(); i++)
	{
		setSpeaker(avatar_ids[i]);
	}

	// check if text only speakers have moved out of chat range
	for (speaker_map_t::iterator speaker_it = mSpeakers.begin(); speaker_it != mSpeakers.end(); ++speaker_it)
	{
		LLUUID speaker_id = speaker_it->first;
		LLSpeaker* speakerp = speaker_it->second;
		if (speakerp->mStatus == LLSpeaker::STATUS_TEXT_ONLY)
		{
			LLVOAvatar* avatarp = (LLVOAvatar*)gObjectList.findObject(speaker_id);
			if (!avatarp || dist_vec_squared(avatarp->getPositionAgent(), gAgent.getPositionAgent()) > CHAT_NORMAL_RADIUS_SQUARED)
			{
				setSpeakerNotInChannel(speakerp);
			}
		}
	}
}