class.assFormulaQuestionExport.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once "./Modules/TestQuestionPool/classes/export/qti12/class.assQuestionExport.php";

class assFormulaQuestionExport extends assQuestionExport
{
        function toXML($a_include_header = true, $a_include_binary = true, $a_shuffle = false, $test_output = false, $force_image_references = false)
        {
                global $ilias;
                
                include_once 'Services/Xml/classes/class.ilXmlWriter.php';
                $a_xml_writer = new ilXmlWriter;
                // set xml header
                $a_xml_writer->xmlHeader();
                $a_xml_writer->xmlStartTag("questestinterop");
                $attrs = array(
                        "ident" => "il_".IL_INST_ID."_qst_".$this->object->getId(),
                        "title" => $this->object->getTitle()
                );
                $a_xml_writer->xmlStartTag("item", $attrs);
                // add question description
                $a_xml_writer->xmlElement("qticomment", NULL, $this->object->getComment());
                // add estimated working time
                $workingtime = $this->object->getEstimatedWorkingTime();
                $duration = sprintf("P0Y0M0DT%dH%dM%dS", $workingtime["h"], $workingtime["m"], $workingtime["s"]);
                $a_xml_writer->xmlElement("duration", NULL, $duration);
                // add ILIAS specific metadata
                $a_xml_writer->xmlStartTag("itemmetadata");
                $a_xml_writer->xmlStartTag("qtimetadata");
                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "ILIAS_VERSION");
                $a_xml_writer->xmlElement("fieldentry", NULL, $ilias->getSetting("ilias_version"));
                $a_xml_writer->xmlEndTag("qtimetadatafield");
                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "QUESTIONTYPE");
                $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getQuestionType());
                $a_xml_writer->xmlEndTag("qtimetadatafield");
                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "AUTHOR");
                $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getAuthor());
                $a_xml_writer->xmlEndTag("qtimetadatafield");
                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "points");
                $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getPoints());
                $a_xml_writer->xmlEndTag("qtimetadatafield");
                foreach ($this->object->getVariables() as $variable)
                {
                        $var = array(
                                "precision" => $variable->getPrecision(),
                                "intprecision" => $variable->getIntprecision(),
                                "rangemin" => $variable->getRangeMin(),
                                "rangemax" => $variable->getRangeMax(),
                                "unit" => (is_object($variable->getUnit())) ? $variable->getUnit()->getUnit() : "",
                                "unitvalue" => (is_object($variable->getUnit())) ? $variable->getUnit()->getId() : ""
                        );
                        $a_xml_writer->xmlStartTag("qtimetadatafield");
                        $a_xml_writer->xmlElement("fieldlabel", NULL, $variable->getVariable());
                        $a_xml_writer->xmlElement("fieldentry", NULL, serialize($var));
                        $a_xml_writer->xmlEndTag("qtimetadatafield");
                }
                foreach ($this->object->getResults() as $result)
                {
                        $resultunits = $this->object->getResultUnits($result);
                        $ru = array();
                        foreach ($resultunits as $unit)
                        {
                                array_push($ru, array("unit" => $unit->getUnit(), "unitvalue" => $unit->getId()));
                        }
                        $res = array(
                                "precision" => $result->getPrecision(),
                                "tolerance" => $result->getTolerance(),
                                "rangemin" => $result->getRangeMin(),
                                "rangemax" => $result->getRangeMax(),
                                "points" => $result->getPoints(),
                                "formula" => $result->getFormula(),
                                "rating" => ($result->getRatingSimple()) ? "" : array("sign" => $result->getRatingSign(), "value" => $result->getRatingValue(), "unit" => $result->getRatingUnit()),
                                "unit" => (is_object($result->getUnit())) ? $result->getUnit()->getUnit() : "",
                                "unitvalue" => (is_object($result->getUnit())) ? $result->getUnit()->getId() : "",
                                "resultunits" => $ru
                        );
                        $a_xml_writer->xmlStartTag("qtimetadatafield");
                        $a_xml_writer->xmlElement("fieldlabel", NULL, $result->getResult());
                        $a_xml_writer->xmlElement("fieldentry", NULL, serialize($res));
                        $a_xml_writer->xmlEndTag("qtimetadatafield");
                }
                
                // additional content editing information
                $this->addAdditionalContentEditingModeInformation($a_xml_writer);
                $this->addGeneralMetadata($a_xml_writer);
                
                $a_xml_writer->xmlEndTag("qtimetadata");
                $a_xml_writer->xmlEndTag("itemmetadata");

                // PART I: qti presentation
                $attrs = array(
                        "label" => $this->object->getTitle()
                );
                $a_xml_writer->xmlStartTag("presentation", $attrs);
                // add flow to presentation
                $a_xml_writer->xmlStartTag("flow");
                // add material with question text to presentation
                $this->object->addQTIMaterial($a_xml_writer, $this->object->getQuestion());
                // add answers to presentation
                $a_xml_writer->xmlEndTag("flow");
                $a_xml_writer->xmlEndTag("presentation");
                
                $a_xml_writer->xmlEndTag("item");
                $a_xml_writer->xmlEndTag("questestinterop");

                $xml = $a_xml_writer->xmlDumpMem(FALSE);
                if (!$a_include_header)
                {
                        $pos = strpos($xml, "?>");
                        $xml = substr($xml, $pos + 2);
                }
                return $xml;
        }

}

?>