Components\ContactManager\Models\ContactCategory::setAliasAttribute PHP Метод

    public function setAliasAttribute($alias)
    {
        if ($alias == '') {
            $alias = Str::slug($this->attributes['name']);
            $aliases = $this->whereRaw("alias REGEXP '^{$alias}(-[0-9]*)?\$'");
            if ($aliases->count() === 0) {
                $this->attributes['alias'] = $alias;
            } else {
                // get reverse order and get first
                $lastAliasNumber = intval(str_replace($alias . '-', '', $aliases->orderBy('alias', 'desc')->first()->alias));
                $this->attributes['alias'] = $alias . '-' . ($lastAliasNumber + 1);
            }
        } else {
            $this->attributes['alias'] = $alias;
        }
    }