.
***********************************************************************/
//---------------------------------------------------------------------------------------------
function get_exchange_rate($rate_id)
{
$sql = "SELECT * FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
$result = db_query($sql, "could not get exchange rate for $rate_id");
return db_fetch($result);
}
// Retrieves buy exchange rate for given currency/date, zero if no result
function get_date_exchange_rate($curr_code, $date_)
{
$date = date2sql($date_);
$sql = "SELECT rate_buy FROM ".TB_PREF."exchange_rates WHERE curr_code=".db_escape($curr_code)
." AND date_='$date'";
$result = db_query($sql, "could not get exchange rate for $curr_code - $date_");
if(db_num_rows($result) == 0)
return 0;
$row = db_fetch($result);
return $row[0];
}
//---------------------------------------------------------------------------------------------
function update_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
{
if (is_company_currency($curr_code))
display_db_error("Exchange rates cannot be set for company currency", "", true);
$date = date2sql($date_);
$sql = "UPDATE ".TB_PREF."exchange_rates SET rate_buy=$buy_rate, rate_sell=".db_escape($sell_rate)
." WHERE curr_code=".db_escape($curr_code)." AND date_='$date'";
db_query($sql, "could not add exchange rate for $curr_code");
}
//---------------------------------------------------------------------------------------------
function add_exchange_rate($curr_code, $date_, $buy_rate, $sell_rate)
{
if (is_company_currency($curr_code))
display_db_error("Exchange rates cannot be set for company currency", "", true);
$date = date2sql($date_);
$sql = "INSERT INTO ".TB_PREF."exchange_rates (curr_code, date_, rate_buy, rate_sell)
VALUES (".db_escape($curr_code).", '$date', ".db_escape($buy_rate)
.", ".db_escape($sell_rate).")";
db_query($sql, "could not add exchange rate for $curr_code");
}
//---------------------------------------------------------------------------------------------
function delete_exchange_rate($rate_id)
{
$sql = "DELETE FROM ".TB_PREF."exchange_rates WHERE id=".db_escape($rate_id);
db_query($sql, "could not delete exchange rate $rate_id");
}
//-----------------------------------------------------------------------------
// Retrieve exchange rate as of date $date from external source (usually inet)
//
function retrieve_exrate($curr_b, $date)
{
global $Hooks;
if (method_exists($Hooks, 'retrieve_exrate'))
return $Hooks->retrieve_exrate($curr_b, $date);
else
return get_extern_rate($curr_b, 'ECB', $date);
}
//-----------------------------------------------------------------------------
function get_extern_rate($curr_b, $provider = 'ECB', $date)
{
$curr_a = get_company_pref('curr_default');
if ($provider == 'ECB')
{
$filename = "/stats/eurofxref/eurofxref-daily.xml";
$site = "www.ecb.int";
}
elseif ($provider == 'YAHOO')
{
$filename = "/q?s={$curr_a}{$curr_b}=X";
$site = "finance.yahoo.com";
}
elseif ($provider == 'GOOGLE')
{
$filename = "/finance/converter?a=1&from={$curr_a}&to={$curr_b}";
$site = "finance.google.com";
}
$contents = '';
if (function_exists('curl_init'))
{ // first check with curl as we can set short timeout;
$retry = 1;
do {
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, 'http://'.$site.$filename);
curl_setopt ($ch, CURLOPT_COOKIEJAR, "cookie.txt");
curl_setopt ($ch, CURLOPT_HEADER, 0);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($ch, CURLOPT_TIMEOUT, 3);
$contents = curl_exec ($ch);
curl_close($ch);
// due to resolver bug in some curl versions (e.g. 7.15.5)
// try again for constant IP.
$site="195.128.2.97";
} while( ($contents == '') && $retry--);
} else {
$handle = @fopen("http://".$site.$filename, 'rb');
if ($handle) {
do
{
$data = @fread( $handle, 4096 );
if ( strlen ( $data ) == 0 )
break;
$contents .= $data; // with this syntax only text will be translated, whole text with htmlspecialchars($data)
}
while (true);
@fclose( $handle );
} // end handle
}
if (!$contents) {
display_warning(_("Cannot retrieve currency rate from $provider page. Please set the rate manually."));
}
if ($provider == 'ECB')
{
$contents = str_replace (" |i";
preg_match ( $from_mask, $contents, $out );
$val_a = isset($out[1]) ? $out[1] : 0;
$val_a = str_replace ( ',', '', $val_a );
$to_mask = "||i";
preg_match ( $to_mask, $contents, $out );
$val_b = isset($out[1]) ? $out[1] : 0;
$val_b = str_replace ( ',', '', $val_b );
if ($val_b)
{
$val = $val_a / $val_b;
}
else
{
$val = 0;
}
}
elseif ($provider == 'YAHOO')
{
$val = '';
if (preg_match('/Last\sTrade:(.*?)Trade\sTime/s', $contents, $matches)) {
$val = strip_tags($matches[1]);
$val = str_replace(',', '', $val);
if ($val != 0)
$val = 1 / $val;
}
}
elseif ($provider == 'GOOGLE')
{
$val = '';
$regexp = "%([\d|.]+)\s+{$curr_a}\s+=\s+([\d|.]+)\s+{$curr_b}\s*%s";
if (preg_match($regexp, $contents, $matches))
{
$val = $matches[3];
$val = str_replace(',', '', $val);
if ($val != 0)
$val = 1 / $val;
}
}
return $val;
} /* end function get_extern_rate */
?>