class.assSingleChoiceExport.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 assSingleChoiceExport 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(),
                        "maxattempts" => $this->object->getNrOfTries()
                );
                $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, SINGLE_CHOICE_QUESTION_IDENTIFIER);
                $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");
                
                // additional content editing information
                $this->addAdditionalContentEditingModeInformation($a_xml_writer);
                $this->addGeneralMetadata($a_xml_writer);
                
                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "thumb_size");
                $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getThumbSize());
                $a_xml_writer->xmlEndTag("qtimetadatafield");

                $a_xml_writer->xmlStartTag("qtimetadatafield");
                $a_xml_writer->xmlElement("fieldlabel", NULL, "feedback_setting");
                $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getSpecificFeedbackSetting());
                $a_xml_writer->xmlEndTag("qtimetadatafield");

                $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
                $attrs = array();
                $attrs = array(
                        "ident" => "MCSR",
                        "rcardinality" => "Single"
                );
                $a_xml_writer->xmlStartTag("response_lid", $attrs);
                $solution = $this->object->getSuggestedSolution(0);
                if (count($solution))
                {
                        if (preg_match("/il_(\d*?)_(\w+)_(\d+)/", $solution["internal_link"], $matches))
                        {
                                $a_xml_writer->xmlStartTag("material");
                                $intlink = "il_" . IL_INST_ID . "_" . $matches[2] . "_" . $matches[3];
                                if (strcmp($matches[1], "") != 0)
                                {
                                        $intlink = $solution["internal_link"];
                                }
                                $attrs = array(
                                        "label" => "suggested_solution"
                                );
                                $a_xml_writer->xmlElement("mattext", $attrs, $intlink);
                                $a_xml_writer->xmlEndTag("material");
                        }
                }
                // shuffle output
                $attrs = array();
                if ($this->object->getShuffle())
                {
                        $attrs = array(
                                "shuffle" => "Yes"
                        );
                }
                else
                {
                        $attrs = array(
                                "shuffle" => "No"
                        );
                }
                $a_xml_writer->xmlStartTag("render_choice", $attrs);
                $answers =& $this->object->getAnswers();
                $akeys = array_keys($answers);
                if ($this->object->getShuffle() && $a_shuffle)
                {
                        $akeys = $this->object->pcArrayShuffle($akeys);
                }
                // add answers
                foreach ($akeys as $index)
                {
                        $answer = $answers[$index];
                        $attrs = array(
                                "ident" => $index
                        );
                        $a_xml_writer->xmlStartTag("response_label", $attrs);
                        
                        if (strlen($answer->getImage()))
                        {
                                $this->object->addQTIMaterial($a_xml_writer, $answer->getAnswertext(), FALSE, FALSE);
                                $imagetype = "image/jpeg";
                                if (preg_match("/.*\.(png|gif)$/", $answer->getImage(), $matches))
                                {
                                        $imagetype = "image/" . $matches[1];
                                }
                                if ($force_image_references)
                                {
                                        $attrs = array(
                                                "imagtype" => $imagetype,
                                                "label" => $answer->getImage(),
                                                "uri" => $this->object->getImagePathWeb() . $answer->getImage()
                                        );
                                        $a_xml_writer->xmlElement("matimage", $attrs);
                                }
                                else
                                {
                                        $imagepath = $this->object->getImagePath() . $answer->getImage();
                                        $fh = @fopen($imagepath, "rb");
                                        if ($fh != false)
                                        {
                                                $imagefile = fread($fh, filesize($imagepath));
                                                fclose($fh);
                                                $base64 = base64_encode($imagefile);
                                                $attrs = array(
                                                        "imagtype" => $imagetype,
                                                        "label" => $answer->getImage(),
                                                        "embedded" => "base64"
                                                );
                                                $a_xml_writer->xmlElement("matimage", $attrs, $base64, FALSE, FALSE);
                                        }
                                }
                                $a_xml_writer->xmlEndTag("material");
                        }
                        else
                        {
                                $this->object->addQTIMaterial($a_xml_writer, $answer->getAnswertext());
                        }
                        $a_xml_writer->xmlEndTag("response_label");
                }
                $a_xml_writer->xmlEndTag("render_choice");
                $a_xml_writer->xmlEndTag("response_lid");
                $a_xml_writer->xmlEndTag("flow");
                $a_xml_writer->xmlEndTag("presentation");
                
                // PART II: qti resprocessing
                $a_xml_writer->xmlStartTag("resprocessing");
                $a_xml_writer->xmlStartTag("outcomes");
                $a_xml_writer->xmlStartTag("decvar");
                $a_xml_writer->xmlEndTag("decvar");
                $a_xml_writer->xmlEndTag("outcomes");
                // add response conditions
                foreach ($answers as $index => $answer)
                {
                        $attrs = array(
                                "continue" => "Yes"
                        );
                        $a_xml_writer->xmlStartTag("respcondition", $attrs);
                        // qti conditionvar
                        $a_xml_writer->xmlStartTag("conditionvar");
                        $attrs = array();
                        $attrs = array(
                                "respident" => "MCSR"
                        );
                        $a_xml_writer->xmlElement("varequal", $attrs, $index);
                        $a_xml_writer->xmlEndTag("conditionvar");
                        // qti setvar
                        $attrs = array(
                                "action" => "Add"
                        );
                        $a_xml_writer->xmlElement("setvar", $attrs, $answer->getPoints());
                        // qti displayfeedback
                        $linkrefid = "response_$index";
                        $attrs = array(
                                "feedbacktype" => "Response",
                                "linkrefid" => $linkrefid
                        );
                        $a_xml_writer->xmlElement("displayfeedback", $attrs);
                        $a_xml_writer->xmlEndTag("respcondition");
                }

                $feedback_allcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
                                $this->object->getId(), true
                );
                if (strlen($feedback_allcorrect))
                {
                        $attrs = array(
                                "continue" => "Yes"
                        );
                        $a_xml_writer->xmlStartTag("respcondition", $attrs);
                        // qti conditionvar
                        $a_xml_writer->xmlStartTag("conditionvar");
                        $bestindex = 0;
                        $maxpoints = 0;
                        foreach ($answers as $index => $answer)
                        {
                                if ($answer->getPoints() > $maxpoints)
                                {
                                        $maxpoints = $answer->getPoints();
                                        $bestindex = $index;
                                }
                        }
                        $attrs = array(
                                "respident" => "MCSR"
                        );
                        $a_xml_writer->xmlElement("varequal", $attrs, $bestindex);
                        $a_xml_writer->xmlEndTag("conditionvar");
                        // qti displayfeedback
                        $attrs = array(
                                "feedbacktype" => "Response",
                                "linkrefid" => "response_allcorrect"
                        );
                        $a_xml_writer->xmlElement("displayfeedback", $attrs);
                        $a_xml_writer->xmlEndTag("respcondition");
                }
                
                $feedback_onenotcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
                                $this->object->getId(), false
                );
                if (strlen($feedback_onenotcorrect))
                {
                        $attrs = array(
                                "continue" => "Yes"
                        );
                        $a_xml_writer->xmlStartTag("respcondition", $attrs);
                        // qti conditionvar
                        $a_xml_writer->xmlStartTag("conditionvar");
                        $bestindex = 0;
                        $maxpoints = 0;
                        foreach ($answers as $index => $answer)
                        {
                                if ($answer->getPoints() > $maxpoints)
                                {
                                        $maxpoints = $answer->getPoints();
                                        $bestindex = $index;
                                }
                        }
                        $attrs = array(
                                "respident" => "MCSR"
                        );
                        $a_xml_writer->xmlStartTag("not");
                        $a_xml_writer->xmlElement("varequal", $attrs, $bestindex);
                        $a_xml_writer->xmlEndTag("not");
                        $a_xml_writer->xmlEndTag("conditionvar");
                        // qti displayfeedback
                        $attrs = array(
                                "feedbacktype" => "Response",
                                "linkrefid" => "response_onenotcorrect"
                        );
                        $a_xml_writer->xmlElement("displayfeedback", $attrs);
                        $a_xml_writer->xmlEndTag("respcondition");
                }

                $a_xml_writer->xmlEndTag("resprocessing");

                // PART III: qti itemfeedback
                foreach ($answers as $index => $answer)
                {
                        $linkrefid = "response_$index";
                        $attrs = array(
                                "ident" => $linkrefid,
                                "view" => "All"
                        );
                        $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
                        // qti flow_mat
                        $a_xml_writer->xmlStartTag("flow_mat");
                        $fb = $this->object->feedbackOBJ->getSpecificAnswerFeedbackExportPresentation(
                                $this->object->getId(), $index
                        );
                        $this->object->addQTIMaterial($a_xml_writer, $fb);
                        $a_xml_writer->xmlEndTag("flow_mat");
                        $a_xml_writer->xmlEndTag("itemfeedback");
                }
                if (strlen($feedback_allcorrect))
                {
                        $attrs = array(
                                "ident" => "response_allcorrect",
                                "view" => "All"
                        );
                        $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
                        // qti flow_mat
                        $a_xml_writer->xmlStartTag("flow_mat");
                        $this->object->addQTIMaterial($a_xml_writer, $feedback_allcorrect);
                        $a_xml_writer->xmlEndTag("flow_mat");
                        $a_xml_writer->xmlEndTag("itemfeedback");
                }
                if (strlen($feedback_onenotcorrect))
                {
                        $attrs = array(
                                "ident" => "response_onenotcorrect",
                                "view" => "All"
                        );
                        $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
                        // qti flow_mat
                        $a_xml_writer->xmlStartTag("flow_mat");
                        $this->object->addQTIMaterial($a_xml_writer, $feedback_onenotcorrect);
                        $a_xml_writer->xmlEndTag("flow_mat");
                        $a_xml_writer->xmlEndTag("itemfeedback");
                }
                
                $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;
        }

}

?>