$eventManager = \Bitrix\Main\EventManager::getInstance();

$eventManager->addEventHandlerCompatible('main', 'OnUserTypeBuildList',   ['CUserTypeBookCover', 'GetUserTypeDescription']);

class CUserTypeBookCover extends \CUserTypeFile
{
    const USER_TYPE_ID = 'bookcover';

    function GetUserTypeDescription()
    {
        return array(
            "USER_TYPE_ID"  => static::USER_TYPE_ID,
            "CLASS_NAME"    => __CLASS__,
            "DESCRIPTION"   => "Book Cover",
            "BASE_TYPE"     => \CUserTypeManager::BASE_TYPE_FILE,
            "VIEW_CALLBACK" => array(__CLASS__, 'GetPublicView'),
            "EDIT_CALLBACK" => array(__CLASS__, 'GetPublicEdit'),
        );
    }

    function PrepareSettings($arUserField)
    {
        return array(
            "LIST_WIDTH" => intval($arUserField["SETTINGS"]["LIST_WIDTH"]),
            "LIST_HEIGHT" => intval($arUserField["SETTINGS"]["LIST_HEIGHT"]),
        );
    }

    function GetSettingsHTML($arUserField = false, $arHtmlControl, $bVarsFromForm)
    {
        $result = '';
        if($bVarsFromForm)
        {
            $width = intval($GLOBALS[$arHtmlControl["NAME"]]["LIST_WIDTH"]);
        }
        elseif(is_array($arUserField) && isset($arUserField["USER_TYPE_SETTINGS"]["LIST_WIDTH"]))
        {
            $width = intval($arUserField["USER_TYPE_SETTINGS"]["LIST_WIDTH"]);
        }
        else
        {
            $width = 200;
        }
        if($bVarsFromForm)
        {
            $height = intval($GLOBALS[$arHtmlControl["USER_TYPE_SETTINGS"]]["LIST_HEIGHT"]);
        }
        elseif(is_array($arUserField) && isset($arUserField["USER_TYPE_SETTINGS"]["LIST_WIDTH"]))
        {
            $height = intval($arUserField["USER_TYPE_SETTINGS"]["LIST_HEIGHT"]);
        }
        else
        {
            $height = 200;
        }

        $result .= '
        <tr>
        <td>Максимальный размер изображения:</td>
        <td>
        <input type="text" name="'.$arHtmlControl["NAME"].'[LIST_WIDTH]" size="7"  maxlength="20" value="'.$width.'">
        px
        x
        <input type="text" name="'.$arHtmlControl["NAME"].'[LIST_HEIGHT]" size="7"  maxlength="20" value="'.$height.'">
        px
        </td>
        </tr>
        ';
        return $result;
    }

    function CheckFields($arUserField, $value)
    {
        $maxWidth=140;
        $maxHeight=140;
        $aMsg = array();
        $error = "";
        $extensions=explode(',',$arUserField['FILE_TYPE']);

        if(is_array($extensions) && count($extensions)){
            $error = CFile::CheckImageFile($value['VALUE'], 0, 640, 640, $arUserField['FILE_TYPE']);
        }
        if(strlen($error))
        {
            $aMsg[] = array(
                "id" => $arUserField["NAME"],
                "text" => $error
            );
        }
        $file = CFile::GetImageSize($value['VALUE']['tmp_name']);
        if ($file !== false && is_array($file)){
            if ($file[0] > $maxWidth){
                $aMsg[] = $arUserField["NAME"].': Ширина должна быть меньше чем '.$maxWidth.'px;';
            }
            if ($file[1] > $maxHeight){
                $aMsg[] = $arUserField["NAME"].': Высота должна быть меньше чем '.$maxHeight.'px;';
            }
        }
        return $aMsg;
    }
}