<?php

namespace ACP\Sorting\FormatValue;

use ACP\Sorting\FormatValue;

class SerializedSettingFormatter implements FormatValue
{

    private FormatValue $formatter;

    public function __construct(FormatValue $formatter)
    {
        $this->formatter = $formatter;
    }

    public function format_value($string)
    {
        $values = maybe_unserialize($string);

        if (empty($values) || ! is_array($values)) {
            return null;
        }

        $formatted = array_map([$this->formatter, 'format_value'], $values);

        return implode(' ', $formatted);
    }

}