//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//
//=============================================================================//
#include "quakedef.h"
#include "server.h"
#include "enginesingleuserfilter.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

void SV_DetermineMulticastRecipients( bool usepas, const Vector& origin, CPlayerBitVec& playerbits );

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
CEngineRecipientFilter::CEngineRecipientFilter()
{
	Reset();
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void CEngineRecipientFilter::Reset( void )
{
	m_bReliable			= false;
	m_bInit				= false;
	m_Recipients.RemoveAll();
}

void CEngineRecipientFilter::MakeReliable( void )
{
	m_bReliable = true;
}


void CEngineRecipientFilter::MakeInitMessage( void )
{
	m_bInit = true;
}

int CEngineRecipientFilter::GetRecipientCount( void ) const
{
	return m_Recipients.Count();
}

int	CEngineRecipientFilter::GetRecipientIndex( int slot ) const
{
	if ( slot < 0 || slot >= GetRecipientCount() )
		return -1;

	return m_Recipients[ slot ];
}

void CEngineRecipientFilter::AddAllPlayers( void )
{
	m_Recipients.RemoveAll();

	for ( int i = 0; i < sv.GetClientCount(); i++ )
	{
		IClient *cl = sv.GetClient( i );

		if ( !cl->IsActive() )
			continue;

		m_Recipients.AddToTail( i+1 );
	}
}


void CEngineRecipientFilter::AddRecipient( int index )
{
	// Already in list
	if ( m_Recipients.Find( index ) != m_Recipients.InvalidIndex() )
		return;

	m_Recipients.AddToTail( index );
}

void CEngineRecipientFilter::RemoveRecipient( int index )
{
	// Remove it if it's in the list
	m_Recipients.FindAndRemove( index );
}

void CEngineRecipientFilter::AddPlayersFromBitMask( CPlayerBitVec& playerbits )
{
	for( int i = 0; i < sv.GetClientCount(); i++ )
	{
		if ( !playerbits[i] )
			continue;

		IClient *cl = sv.GetClient( i );
		if ( !cl->IsActive() )
			continue;

		AddRecipient( i + 1 );
	}
}

bool CEngineRecipientFilter::IncludesPlayer(int playerindex)
{
	for( int i = 0; i < GetRecipientCount(); i++ )
	{
		if ( playerindex ==	GetRecipientIndex(i) )
			return true;
	}

	return false;
}

void CEngineRecipientFilter::AddPlayersFromFilter(const IRecipientFilter *filter )
{
	for( int i = 0; i < filter->GetRecipientCount(); i++ )
	{
		AddRecipient( filter->GetRecipientIndex(i) );
	}
}

void CEngineRecipientFilter::AddRecipientsByPVS( const Vector& origin )
{
	if ( sv.GetMaxClients() == 1 )
	{
		AddAllPlayers();
	}
	else
	{
		CPlayerBitVec playerbits;
		SV_DetermineMulticastRecipients( false, origin, playerbits );
		AddPlayersFromBitMask( playerbits );
	}
}

void CEngineRecipientFilter::AddRecipientsByPAS( const Vector& origin )
{
	if ( sv.GetMaxClients() == 1 )
	{
		AddAllPlayers();
	}
	else
	{
		CPlayerBitVec playerbits;
		SV_DetermineMulticastRecipients( true, origin, playerbits );
		AddPlayersFromBitMask( playerbits );
	}
}