Recurr\Transformer\TextTransformer::getByMonthDayAsText PHP Метод

    public function getByMonthDayAsText($byMonthDay, $listSeparator = 'and')
    {
        if (empty($byMonthDay)) {
            return '';
        }
        // sort negative indices in reverse order so we get e.g. 1st, 2nd, 4th, 3rd last, last day
        usort($byMonthDay, function ($a, $b) {
            if ($a < 0 && $b < 0 || $a >= 0 && $b >= 0) {
                return $a - $b;
            }
            return $b - $a;
        });
        // generate ordinal numbers and insert a "on the" for clarity in the middle if we have both
        // positive and negative ordinals. This is to avoid confusing situations like:
        //
        // monthly on the 1st and 2nd to the last day
        //
        // which gets clarified to:
        //
        // monthly on the 1st day and on the 2nd to the last day
        $hadPositives = false;
        $hadNegatives = false;
        foreach ($byMonthDay as $index => $day) {
            $prefix = '';
            if ($day >= 0) {
                $hadPositives = true;
            }
            if ($day < 0) {
                if ($hadPositives && !$hadNegatives && $listSeparator === 'and') {
                    $prefix = $this->translator->trans('on the') . ' ';
                }
                $hadNegatives = true;
            }
            $byMonthDay[$index] = $prefix . $this->getOrdinalNumber($day, end($byMonthDay) < 0, true);
        }
        return $this->getListStringFromArray($byMonthDay, $listSeparator);
    }