<?php 
	$c_id = $_REQUEST['c_id'];
	$d = $_REQUEST['date'];
	
	
	if (!$c_id || !$d) {echo '-1'; return;}
	global $timedate;
	$d = explode('-',reset(explode(" ",$timedate->to_db($d))));
	$date = date("Y-m-d",@mktime(0,0,0,$d[1],$d[2],$d[0])+3600*24);	
	
	//what day is it?
	$dn = $GLOBALS['db']->fetchByAssoc($GLOBALS['db']->query("SELECT DAYNAME('$date') as dayname"));
	

	if ($dn['dayname'] == 'Sunday') //- 2 days
		$q = "SELECT value FROM currency_nbp_archive WHERE currency_id='$c_id' AND date = DATE_ADD('$date', INTERVAL -2 DAY)";
	elseif ($dn['dayname'] == 'Saturday') //- 1 day
		$q = "SELECT value FROM currency_nbp_archive WHERE currency_id='$c_id' AND date = DATE_ADD('$date', INTERVAL -1 DAY)";
	else //any other day - just get exchange
		$q = "SELECT value FROM currency_nbp_archive WHERE currency_id='$c_id' AND date='$date'";
	
	$w = $GLOBALS['db']->fetchByAssoc($GLOBALS['db']->query($q));

    echo $w['value']; return;
    
	
?>