xyzshop/helper/refill/policy/PolicyUtil.php

<?php

namespace refill;

class PolicyUtil
{
    private const MixedQuality = [Quality::DefSuccess, Quality::NormalCardkey, Quality::NormalQuick];
    public static function mixed_quality($quality) : bool
    {
        if(in_array($quality,PolicyUtil::MixedQuality)) {
            return true;
        } else {
            return false;
        }
    }

    public static function mixed_remove_last($org_quality,$qualities,$all_aualities)
    {
        if(self::mixed_quality($org_quality))
        {
            $last_quality = end($all_aualities);
            $result = [];
            foreach ($qualities as $quality) {
                if($last_quality != $quality) {
                    $result[] = $quality;
                }
            }
            return $result;
        }
        else {
            return $qualities;
        }
    }
}