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    <?php

    namespace WPGMZA\CustomFieldFilterWidget;

    require_once(plugin_dir_path(__DIR__) . 'custom-fields/class.custom-field-filter-widget.php');

    class Dropdown extends \WPGMZA\CustomFieldFilterWidget
    {
        public function __construct($filter)
        {
            \WPGMZA\CustomFieldFilterWidget::__construct($filter);
        }

        public function html()
        {
            $attributes = $this->getAttributesString();

            $html = "<select $attributes>";

            $html .= '<option value="" disabled selected style="display: none;">' .
                htmlspecialchars($this->filter->getFieldData()->name) .
                '</option>';

            foreach($this->filter->getFieldValues() as $value)
            {
                $html .= '<option>' . htmlspecialchars($value) . '</option>';
            }

            $html .= '</select>';

            return $html;
        }
    }