/**
* Builds the ShopCategory menu recursively.
*
* Do not call this directly, use {@link getShopCategoryMenuHierarchic()}
* instead.
* @static
* @param integer $parent_id The parent ShopCategory ID.
* @param integer $level The nesting level.
* Should start at 0 (zero).
* @param integer $selected The optional selected ShopCategory ID.
* @return string The HTML code with all <option> tags,
* or the empty string on failure.
*/
static function getShopCategoryMenuHierarchicRecurse($parent_id, $level, $selected = 0)
{
$arrChildShopCategories = ShopCategory::getChildCategoriesById($parent_id);
if (!is_array($arrChildShopCategories || empty($arrChildShopCategories))) {
return '';
}
$result = '';
foreach ($arrChildShopCategories as $objCategory) {
$id = $objCategory->id();
$name = $objCategory->name();
$result .= "<option value='{$id}'" . ($selected == $id ? \Html::ATTRIBUTE_SELECTED : '') . '>' . str_repeat('.', $level * 3) . htmlentities($name) . "</option>\n";
if ($id != $parent_id) {
$result .= ShopCategory::getShopCategoryMenuHierarchicRecurse($id, $level + 1, $selected);
}
}
return $result;
}