/** 
 * @file llspeakers.cpp
 * @brief Management interface for muting and controlling volume of residents currently speaking
 *
 * $LicenseInfo:firstyear=2005&license=viewergpl$
 * 
 * Copyright (c) 2005-2009, 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.
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llspeakers.h"

#include "llagent.h"
#include "llappviewer.h"
#include "llimview.h"
#include "llmutelist.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()
{
	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;
}

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;
}

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())
	{
		delete it_speaker->second;
		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);
	}

	// do not return true to avoid deleting of an timer twice:
	// in LLSpeakersDelayActionsStorage::unsetActionTimer() & LLEventTimer::updateClass()
	return false;
}


//
// LLSpeakerMgr
//

LLSpeakerMgr::LLSpeakerMgr(LLVoiceChannel* channelp) : 
	mVoiceChannel(channelp)
{
	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);
		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();
			}
		}
	}

	mSpeakerDelayRemover->unsetActionTimer(speakerp->mID);

	return speakerp;
}

void LLSpeakerMgr::update(BOOL resort_ok)
{
	if (!gVoiceClient)
	{
		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 && gVoiceClient->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 && gVoiceClient->getVoiceEnabled(speaker_id))
		{
			speakerp->mSpeechVolume = gVoiceClient->getCurrentPower(speaker_id);
			BOOL moderator_muted_voice = gVoiceClient->getIsModeratorMuted(speaker_id);
			if (moderator_muted_voice != speakerp->mModeratorMutedVoice)
			{
				speakerp->mModeratorMutedVoice = moderator_muted_voice;
				speakerp->fireEvent(new LLSpeakerVoiceModerationEvent(speakerp));
			}

			if (gVoiceClient->getOnMuteList(speaker_id) || speakerp->mModeratorMutedVoice)
			{
				speakerp->mStatus = LLSpeaker::STATUS_MUTED;
			}
			else if (gVoiceClient->getIsSpeaking(speaker_id))
			{
				// reset inactivity expiration
				if (speakerp->mStatus != LLSpeaker::STATUS_SPEAKING)
				{
					speakerp->mLastSpokeTime = mSpeechTimer.getElapsedTimeF32();
					speakerp->mHasSpoken = TRUE;
				}
				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 && gVoiceClient->inProximalChannel()) || (mVoiceChannel && mVoiceChannel->isActive()))
	{
		LLVoiceClient::participantMap* participants = gVoiceClient->getParticipantList();
		if(participants)
		{
			LLVoiceClient::participantMap::iterator participant_it;

			// add new participants to our list of known speakers
			for (participant_it = participants->begin(); participant_it != participants->end(); ++participant_it)
			{
				LLVoiceClient::participantState* participantp = participant_it->second;
				setSpeaker(participantp->mAvatarID, participantp->mDisplayName, LLSpeaker::STATUS_VOICE_ACTIVE, (participantp->isAvatar()?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;
		}
	}

	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;
	}
}

BOOL LLSpeakerMgr::isVoiceActive()
{
	// mVoiceChannel = NULL means current voice channel, whatever it is
	return LLVoiceClient::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 )
					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 )
						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::moderateVoiceOtherParticipants(const LLUUID& excluded_avatar_id, bool unmute_everyone_else)
{
	// *TODO: mantipov: add more intellectual processing of several following requests if it is needed.
	/*
		Such situation should be tested:
		 "Moderator sends the same second request before first response is come"
		Moderator sends "mute everyone else" for A and then for B
			two requests to disallow voice chat are sent
			UUID of B is stored.
		Then first response (to disallow voice chat) is come
			request to allow voice for stored avatar (B)
		Then second response (to disallow voice chat) is come
			have nothing to do, the latest selected speaker is already enabled

			What can happen?
		If request to allow voice for stored avatar (B) is processed on server BEFORE 
		second request to disallow voice chat all speakers will be disabled on voice.
		But I'm not sure such situation is possible. 
		See EXT-3431.
	*/

	mReverseVoiceModeratedAvatarID = excluded_avatar_id;
	moderateVoiceSession(getSessionID(), !unmute_everyone_else);
}

void LLIMSpeakerMgr::processSessionUpdate(const LLSD& session_update)
{
	if (mReverseVoiceModeratedAvatarID.isNull()) return;

	if (session_update.has("moderated_mode") &&
		session_update["moderated_mode"].has("voice"))
	{
		BOOL voice_moderated = session_update["moderated_mode"]["voice"];

		moderateVoiceParticipant(mReverseVoiceModeratedAvatarID, voice_moderated);

		mReverseVoiceModeratedAvatarID = LLUUID::null;
	}
}

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));
}


//
// 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
	{
		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
	std::vector<LLUUID> 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(avatarp->getPositionAgent(), gAgent.getPositionAgent()) > CHAT_NORMAL_RADIUS)
			{
				setSpeakerNotInChannel(speakerp);
			}
		}
	}
}