/**
* Returns a unique incremented number formatted with $format for $type
* $format has supported replacements: [NUMBER:n], [YEAR], [YEARSHORT], [MONTH], [DAY], [SITENAME], [SITEURL], [UNIQ_ID] and all $extraStrings and $user_id normal CB replacement strings [cb_fieldname]
*
* @param string $type Type of number ('proformainvoice', 'invoice', later: 'quote')
* @param string $format Format of number ( e.g. '[NUMBER:1]' )
* @param int $user_id User id
* @param array $extraStrings Extra strings
* @param int $increment Increment for next invoice
* @return string Formatted number (or NULL if it failed for some reason)
*/
public static function generateUniqueNumber($type, $format, $user_id, $extraStrings, $increment = 1)
{
$curNum = new self();
$numberFormat = $curNum->_internal_generateUniqueNumber($type, $format, $increment);
return self::replaceCbVars($numberFormat, $user_id, $extraStrings);
}
