Would be nice to be able to pass an additional option parameter to the format() method of CurrencyFormat class. This additional parameter would have the helper wrap NEGATIVE values with a element that can then be styled in a view to show in color, wrapped in parenthesis, etc.

Currently, Blesta wraps the value as follows:

// Wrap the currency code in a span tag
if ($html_wrap_code) {
$value .= ' ' . $currency . '';
}

if ($options['html_code']) {
$value = '' . $value . '';
}

I propose an added test for negative value and where the option is set. This would be inserted just above the return $value line:

// value is negative and options['html_wrap_negative'] is true?
if( strpos($value, '-') !== false && $options['html_wrap_negative'] ) {
$value = '' . $value . '';
}

This four-line addition to the format() method allows us to show negative currency values like traditional systems do. By using an added option and a span element with the CSS class name allows others to either take advantage or not.