Method getPriceFormat

/*
 * 1) the price can be negative - for example rounding
 * 2) or we can force the negative - e.g. for discount
 */
public function getPriceFormat($price, $negative = 0, $skipCurrencyConverting = 0, $forceCurrency = 0, $skipPrefix = 0, $skipSuffix = 0)
{
    $currentCurrency = $this->currency_id;
    if ((int) $forceCurrency > 0) {
        $this->setCurrency((int) $forceCurrency);
    }
    if ($price < 0) {
        $negative = 1;
    }
    // If negative is forced by parameter but the price is 0 in real - skip the negative sign
    if ($price == 0) {
        $negative = 0;
    }
    if ($price == '') {
        $price = 0;
    }
    if ($skipCurrencyConverting == 0) {
        $price *= $this->exchange_rate;
    }
    // Round after exchange rate
    $price = $this->roundPrice($price);
    if ($negative) {
        $price = abs($price);
    }
    $price = number_format((double) $price, $this->price_decimals, $this->price_dec_symbol, $this->price_thousands_sep);
    switch ($this->price_format) {
        case 1:
            $price = $price . $this->price_currency_symbol;
            break;
        case 2:
            $price = $this->price_currency_symbol . $price;
            break;
        case 3:
            $price = $this->price_currency_symbol . ' ' . $price;
            break;
        case 0:
        default:
            $price = $price . ' ' . $this->price_currency_symbol;
            break;
    }
    $o = '';
    if ($negative) {
        $o = '- ' . $this->price_prefix . $price . $this->price_suffix;
    } else {
        $o = $this->price_prefix . $price . $this->price_suffix;
    }
    if ((int) $forceCurrency > 0) {
        $this->setCurrency((int) $currentCurrency);
    }
    return $o;
}