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Public Member Functions
assSingleChoiceExport Class Reference
Modules/TestQuestionPool

Class for single choice question exports. More...

+ Inheritance diagram for assSingleChoiceExport:
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Public Member Functions

 toXML ($a_include_header=true, $a_include_binary=true, $a_shuffle=false, $test_output=false, $force_image_references=false)
 Returns a QTI xml representation of the question.
- Public Member Functions inherited from assQuestionExport
 assQuestionExport (&$a_object)
 assQuestionExport constructor
 exportFeedbackOnly ($a_xml_writer)

Additional Inherited Members

- Data Fields inherited from assQuestionExport
 $object

Detailed Description

Class for single choice question exports.

assSingleChoiceExport is a class for single choice question exports

Author
Helmut Schottmüller helmu.nosp@m.t.sc.nosp@m.hottm.nosp@m.uell.nosp@m.er@ma.nosp@m.c.co.nosp@m.m
Version
$Id$

Definition at line 35 of file class.assSingleChoiceExport.php.

Member Function Documentation

assSingleChoiceExport::toXML (   $a_include_header = true,
  $a_include_binary = true,
  $a_shuffle = false,
  $test_output = false,
  $force_image_references = false 
)

Returns a QTI xml representation of the question.

Returns a QTI xml representation of the question and sets the internal domxml variable with the DOM XML representation of the QTI xml representation

Returns
string The QTI xml representation of the question public

Reimplemented from assQuestionExport.

Definition at line 46 of file class.assSingleChoiceExport.php.

References SINGLE_CHOICE_QUESTION_IDENTIFIER, and ilXmlWriter\xmlHeader().

{
global $ilias;
include_once("./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, 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");
$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->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 = $this->object->getFeedbackGeneric(1);
if (strlen($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 = $this->object->getFeedbackGeneric(0);
if (strlen($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");
$this->object->addQTIMaterial($a_xml_writer, $this->object->getFeedbackSingleAnswer($index));
$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;
}

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