/*
 * This file is a part of Winix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008-2012, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#include "sessioncontainer.h"
#include "log.h"
#include "misc.h"



SessionContainer::SessionContainer()
{
	table_size = 0;
}


void SessionContainer::SetCur(Cur * pcur)
{
	cur = pcur;
}


void SessionContainer::SetConfig(Config * pconfig)
{
	config = pconfig;
}


void SessionContainer::SetTmpSession(Session * psession)
{
	tmp_session = psession;
}



void SessionContainer::Clear()
{
Table::iterator i = table.begin();

	log << log3 << "SC: deleting all sessions" << logend;

	// don't use table.clear();
	// because plugins session data would not be erased
	// we must set cur->session for each session and then delete it
	while( i != table.end() )
	{
		cur->session = &(*i);
		cur->session->plugin_data.DeleteAll(); // it's better to call it here instead of the destructor
		table.erase(i++);
	}

	// erasing indexes
	index_id.clear();
	table_size = 0;
	cur->session = tmp_session;
}



void SessionContainer::EraseById(IdIterator i)
{
	Session * old_session = tmp_session;

	if( cur->session != &(*i->second) )
		old_session = cur->session;

	cur->session = &(*i->second);

	log << log4 << "SC: deleting session, id: " << i->second->id << logend;

	// call first DeleteAll() because if not then it would be called from the desctructor
	// and there'll be a problem if it throws an exception there
	i->second->plugin_data.DeleteAll();
	table.erase(i->second);
	index_id.erase(i);
	table_size -= 1;

	cur->session = old_session;
}



size_t SessionContainer::Size()
{
	// don't use table.size() as it has O(n) complexity on FreeBSD
	return table_size;
}


SessionContainer::Iterator SessionContainer::Begin()
{
	return table.begin();
}


SessionContainer::Iterator SessionContainer::End()
{
	return table.end();
}


Session & SessionContainer::Back()
{
	return table.back();	
}


SessionContainer::IdIterator SessionContainer::IdBegin()
{
	return index_id.begin();
}


SessionContainer::IdIterator SessionContainer::IdEnd()
{
	return index_id.end();
}



bool SessionContainer::PushBack(const Session & session)
{
	std::pair<IndexId::iterator, bool> index_id_res = index_id.insert( std::make_pair(session.id, table.end()) );

	if( !index_id_res.second )
	{
		// that element already exists (was not inserted now)
		return false;
	}

	Iterator last = table.insert(table.end(), session);
	index_id_res.first->second = last;
	table_size += 1;

	log << log3 << "SC: added session, id: " << session.id << logend;

return true;
}




SessionContainer::Iterator SessionContainer::FindById(long id)
{
IndexId::iterator i;

	i = index_id.find(id);
	
	if( i == index_id.end() )
		return table.end();
		
return i->second;
}