#
class SCIBlockElementHD {

    protected static $_method;
    protected static $_db_res;
    protected static $_GetElements;

    protected $_DeployPictures;
    protected $_DeployLinks;
    protected $_DeployFiles;


    function __construct(
            $Method,
            $arOrder,
            $arFilter,
            $arNav,
            $arSelectFields,
            $arSelectProps
        ) {

        $this->_method = $Method;

        $arSelect = $arSelectFields;

        if ($arSelectProps) {
            foreach ($arSelectProps as $prop) {
                $arSelect[] = 'PROPERTY_'.$prop;
            }
        }

        $this->_db_res = CIBlockElement::GetList($arOrder, $arFilter, false, $arNav, $arSelect);

        # constucte closure
        if ($Method == 'P') {
            $this->_GetElements = function ($db_res, $DeployPictures, $DeployLinks, $DeployFiles) {

                while($arElement = $db_res->GetNext()) {

                    $arElement = $DeployPictures($arElement);
                    $arElement = $DeployLinks($arElement);
                    $arElement = $DeployFiles($arElement);

                    $arElements[] = $arElement;
                }
                return $arElements;
            };
        } elseif ($Method == 'F') {
            $this->_GetElements = function ($db_res, $DeployPictures, $DeployLinks, $DeployFiles) {
                while($arElement = $db_res->Fetch()) {

                    $arElement = $DeployPictures($arElement);
                    $arElement = $DeployLinks($arElement);
                    $arElement = $DeployFiles($arElement);

                    $arElements[] = $arElement;
                }
                return $arElements;
            };
        } else { # S
            $this->_GetElements = function ($db_res, $DeployPictures, $DeployLinks, $DeployFiles) {
                while ($ob = $db_res->GetNextElement()) {
                    $arElement = $ob->GetFields();
                    $arElement['PROPERTIES'] = $ob->GetProperties();

                    $arElement = $DeployPictures($arElement);
                    $arElement = $DeployLinks($arElement);
                    $arElement = $DeployFiles($arElement);

                    $arElements[] = $arElement;
                }
                return $arElements;
            };
        }


        $this->_DeployPictures = function ($element) {return $element;};
        $this->_DeployLinks = function ($element) {return $element;};
        $this->_DeployFiles = function ($element) {return $element;};


        return $this;
    }
    #

    public function DeployPictures() {
        $this->_DeployPictures = function ($element) {
            if(isset($element['PREVIEW_PICTURE'])) {
                $element['PREVIEW_PICTURE'] = (0 < $element['PREVIEW_PICTURE'] ? CFile::GetFileArray($element['PREVIEW_PICTURE']) : false);
            }
            if(isset($element['DETAIL_PICTURE'])) {
                $element['DETAIL_PICTURE'] = (0 < $element['DETAIL_PICTURE'] ? CFile::GetFileArray($element['DETAIL_PICTURE']) : false);
            }
            return $element;
        };
    }
    #

    public function GetNextElement() {

        if ($this->_method == 'S') {
            if($ob = $this->_db_res->GetNextElement()) {
                $arElement = $ob->GetFields();
                $arElement['PROPERTIES'] = $ob->GetProperties();
                return $arElement;
            }
        } elseif ($this->_method == 'P') {
            if($arElement = $this->_db_res->GetNext()) {
                return $arElement;
            }
        } else {
            if($arElement = $this->_db_res->Fetch()) {
                return $arElement;
            }
        }
    }
    #

    public function GetElements() {
        $clsrElements = $this->_GetElements;
        $DeployPictures = $this->_DeployPictures;
        $DeployLinks = $this->_DeployLinks;
        $DeployFiles = $this->_DeployFiles;
        return $clsrElements($this->_db_res, $DeployPictures, $DeployLinks, $DeployFiles);
    }
    #


    public function GetElementsNonClsr() {

        if ($this->_method == 'S') {
            while ($ob = $this->_db_res->GetNextElement()) {
                $arElement = $ob->GetFields();
                $arElement['PROPERTIES'] = $ob->GetProperties();


                if(isset($arElement['PREVIEW_PICTURE'])) {
                    $arElement['PREVIEW_PICTURE'] = (0 < $arElement['PREVIEW_PICTURE'] ? CFile::GetFileArray($arElement['PREVIEW_PICTURE']) : false);
                }
                if(isset($arElement['DETAIL_PICTURE'])) {
                    $arElement['DETAIL_PICTURE'] = (0 < $arElement['DETAIL_PICTURE'] ? CFile::GetFileArray($arElement['DETAIL_PICTURE']) : false);
                }

                $arElements[] = $arElement;
            }
            return $arElements;
        } elseif ($this->_method == 'P') {
            while($arElement = $this->_db_res->GetNext()) {


                if(isset($arElement['PREVIEW_PICTURE'])) {
                    $arElement['PREVIEW_PICTURE'] = (0 < $arElement['PREVIEW_PICTURE'] ? CFile::GetFileArray($arElement['PREVIEW_PICTURE']) : false);
                }
                if(isset($arElement['DETAIL_PICTURE'])) {
                    $arElement['DETAIL_PICTURE'] = (0 < $arElement['DETAIL_PICTURE'] ? CFile::GetFileArray($arElement['DETAIL_PICTURE']) : false);
                }


                $arElements[] = $arElement;
            }
            return $arElements;
        } else {
            while($arElement = $this->_db_res->Fetch()) {

                if(isset($arElement['PREVIEW_PICTURE'])) {
                    $arElement['PREVIEW_PICTURE'] = (0 < $arElement['PREVIEW_PICTURE'] ? CFile::GetFileArray($arElement['PREVIEW_PICTURE']) : false);
                }
                if(isset($arElement['DETAIL_PICTURE'])) {
                    $arElement['DETAIL_PICTURE'] = (0 < $arElement['DETAIL_PICTURE'] ? CFile::GetFileArray($arElement['DETAIL_PICTURE']) : false);
                }


                $arElements[] = $arElement;
            }
            return $arElements;
        }
    }
    #

}
#