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class.assMultipleChoiceExport.php
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1 <?php
2 /* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */
3 
4 include_once "./Modules/TestQuestionPool/classes/export/qti12/class.assQuestionExport.php";
5 
15 class assMultipleChoiceExport extends assQuestionExport
16 {
26  function toXML($a_include_header = true, $a_include_binary = true, $a_shuffle = false, $test_output = false, $force_image_references = false)
27  {
28  global $ilias;
29 
30  include_once("./Services/Xml/classes/class.ilXmlWriter.php");
31  $a_xml_writer = new ilXmlWriter;
32  // set xml header
33  $a_xml_writer->xmlHeader();
34  $a_xml_writer->xmlStartTag("questestinterop");
35  $attrs = array(
36  "ident" => "il_".IL_INST_ID."_qst_".$this->object->getId(),
37  "title" => $this->object->getTitle(),
38  "maxattempts" => $this->object->getNrOfTries()
39  );
40  $a_xml_writer->xmlStartTag("item", $attrs);
41  // add question description
42  $a_xml_writer->xmlElement("qticomment", NULL, $this->object->getComment());
43  // add estimated working time
44  $workingtime = $this->object->getEstimatedWorkingTime();
45  $duration = sprintf("P0Y0M0DT%dH%dM%dS", $workingtime["h"], $workingtime["m"], $workingtime["s"]);
46  $a_xml_writer->xmlElement("duration", NULL, $duration);
47  // add ILIAS specific metadata
48  $a_xml_writer->xmlStartTag("itemmetadata");
49  $a_xml_writer->xmlStartTag("qtimetadata");
50  $a_xml_writer->xmlStartTag("qtimetadatafield");
51  $a_xml_writer->xmlElement("fieldlabel", NULL, "ILIAS_VERSION");
52  $a_xml_writer->xmlElement("fieldentry", NULL, $ilias->getSetting("ilias_version"));
53  $a_xml_writer->xmlEndTag("qtimetadatafield");
54  $a_xml_writer->xmlStartTag("qtimetadatafield");
55  $a_xml_writer->xmlElement("fieldlabel", NULL, "QUESTIONTYPE");
56  $a_xml_writer->xmlElement("fieldentry", NULL, MULTIPLE_CHOICE_QUESTION_IDENTIFIER);
57  $a_xml_writer->xmlEndTag("qtimetadatafield");
58  $a_xml_writer->xmlStartTag("qtimetadatafield");
59  $a_xml_writer->xmlElement("fieldlabel", NULL, "AUTHOR");
60  $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getAuthor());
61  $a_xml_writer->xmlEndTag("qtimetadatafield");
62 
63  // additional content editing information
64  $this->addAdditionalContentEditingModeInformation($a_xml_writer);
65  $this->addGeneralMetadata($a_xml_writer);
66 
67  $a_xml_writer->xmlStartTag("qtimetadatafield");
68  $a_xml_writer->xmlElement("fieldlabel", NULL, "thumb_size");
69  $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getThumbSize());
70  $a_xml_writer->xmlEndTag("qtimetadatafield");
71 
72  $a_xml_writer->xmlStartTag("qtimetadatafield");
73  $a_xml_writer->xmlElement("fieldlabel", NULL, "feedback_setting");
74  $a_xml_writer->xmlElement("fieldentry", NULL, $this->object->getSpecificFeedbackSetting());
75  $a_xml_writer->xmlEndTag("qtimetadatafield");
76 
77  $a_xml_writer->xmlEndTag("qtimetadata");
78  $a_xml_writer->xmlEndTag("itemmetadata");
79 
80  // PART I: qti presentation
81  $attrs = array(
82  "label" => $this->object->getTitle()
83  );
84  $a_xml_writer->xmlStartTag("presentation", $attrs);
85  // add flow to presentation
86  $a_xml_writer->xmlStartTag("flow");
87  // add material with question text to presentation
88  $this->object->addQTIMaterial($a_xml_writer, $this->object->getQuestion());
89  // add answers to presentation
90  $attrs = array();
91  $attrs = array(
92  "ident" => "MCMR",
93  "rcardinality" => "Multiple"
94  );
95  $a_xml_writer->xmlStartTag("response_lid", $attrs);
96  $solution = $this->object->getSuggestedSolution(0);
97  if (count($solution))
98  {
99  if (preg_match("/il_(\d*?)_(\w+)_(\d+)/", $solution["internal_link"], $matches))
100  {
101  $a_xml_writer->xmlStartTag("material");
102  $intlink = "il_" . IL_INST_ID . "_" . $matches[2] . "_" . $matches[3];
103  if (strcmp($matches[1], "") != 0)
104  {
105  $intlink = $solution["internal_link"];
106  }
107  $attrs = array(
108  "label" => "suggested_solution"
109  );
110  $a_xml_writer->xmlElement("mattext", $attrs, $intlink);
111  $a_xml_writer->xmlEndTag("material");
112  }
113  }
114  // shuffle output
115  $attrs = array();
116  if ($this->object->getShuffle())
117  {
118  $attrs = array(
119  "shuffle" => "Yes"
120  );
121  }
122  else
123  {
124  $attrs = array(
125  "shuffle" => "No"
126  );
127  }
128  $a_xml_writer->xmlStartTag("render_choice", $attrs);
129  $answers =& $this->object->getAnswers();
130  $akeys = array_keys($answers);
131  if ($this->object->getShuffle() && $a_shuffle)
132  {
133  $akeys = $this->object->pcArrayShuffle($akeys);
134  }
135  // add answers
136  foreach ($akeys as $index)
137  {
138  $answer = $answers[$index];
139  $attrs = array(
140  "ident" => $index
141  );
142  $a_xml_writer->xmlStartTag("response_label", $attrs);
143 
144  if (strlen($answer->getImage()))
145  {
146  $this->object->addQTIMaterial($a_xml_writer, $answer->getAnswertext(), FALSE, FALSE);
147  $imagetype = "image/jpeg";
148  if (preg_match("/.*\.(png|gif)$/", $answer->getImage(), $matches))
149  {
150  $imagetype = "image/" . $matches[1];
151  }
152  if ($force_image_references)
153  {
154  $attrs = array(
155  "imagtype" => $imagetype,
156  "label" => $answer->getImage(),
157  "uri" => $this->object->getImagePathWeb() . $answer->getImage()
158  );
159  $a_xml_writer->xmlElement("matimage", $attrs);
160  }
161  else
162  {
163  $imagepath = $this->object->getImagePath() . $answer->getImage();
164  $fh = @fopen($imagepath, "rb");
165  if ($fh != false)
166  {
167  $imagefile = fread($fh, filesize($imagepath));
168  fclose($fh);
169  $base64 = base64_encode($imagefile);
170  $attrs = array(
171  "imagtype" => $imagetype,
172  "label" => $answer->getImage(),
173  "embedded" => "base64"
174  );
175  $a_xml_writer->xmlElement("matimage", $attrs, $base64, FALSE, FALSE);
176  }
177  }
178  $a_xml_writer->xmlEndTag("material");
179  }
180  else
181  {
182  $this->object->addQTIMaterial($a_xml_writer, $answer->getAnswertext());
183  }
184  $a_xml_writer->xmlEndTag("response_label");
185  }
186  $a_xml_writer->xmlEndTag("render_choice");
187  $a_xml_writer->xmlEndTag("response_lid");
188  $a_xml_writer->xmlEndTag("flow");
189  $a_xml_writer->xmlEndTag("presentation");
190 
191  // PART II: qti resprocessing
192  $a_xml_writer->xmlStartTag("resprocessing");
193  $a_xml_writer->xmlStartTag("outcomes");
194  $a_xml_writer->xmlStartTag("decvar");
195  $a_xml_writer->xmlEndTag("decvar");
196  $a_xml_writer->xmlEndTag("outcomes");
197  // add response conditions
198  foreach ($answers as $index => $answer)
199  {
200  $attrs = array(
201  "continue" => "Yes"
202  );
203  $a_xml_writer->xmlStartTag("respcondition", $attrs);
204  // qti conditionvar
205  $a_xml_writer->xmlStartTag("conditionvar");
206  $attrs = array();
207  $attrs = array(
208  "respident" => "MCMR"
209  );
210  $a_xml_writer->xmlElement("varequal", $attrs, $index);
211  $a_xml_writer->xmlEndTag("conditionvar");
212  // qti setvar
213  $attrs = array(
214  "action" => "Add"
215  );
216  $a_xml_writer->xmlElement("setvar", $attrs, $answer->getPoints());
217  // qti displayfeedback
218  $linkrefid = "response_$index";
219  $attrs = array(
220  "feedbacktype" => "Response",
221  "linkrefid" => $linkrefid
222  );
223  $a_xml_writer->xmlElement("displayfeedback", $attrs);
224  $a_xml_writer->xmlEndTag("respcondition");
225  $attrs = array(
226  "continue" => "Yes"
227  );
228  $a_xml_writer->xmlStartTag("respcondition", $attrs);
229 
230  // qti conditionvar
231  $a_xml_writer->xmlStartTag("conditionvar");
232  $attrs = array();
233  $attrs = array(
234  "respident" => "MCMR"
235  );
236  $a_xml_writer->xmlStartTag("not");
237  $a_xml_writer->xmlElement("varequal", $attrs, $index);
238  $a_xml_writer->xmlEndTag("not");
239  $a_xml_writer->xmlEndTag("conditionvar");
240  // qti setvar
241  $attrs = array(
242  "action" => "Add"
243  );
244  $a_xml_writer->xmlElement("setvar", $attrs, $answer->getPointsUnchecked());
245  $a_xml_writer->xmlEndTag("respcondition");
246  }
247  $feedback_allcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
248  $this->object->getId(), true
249  );
250  if (strlen($feedback_allcorrect))
251  {
252  $attrs = array(
253  "continue" => "Yes"
254  );
255  $a_xml_writer->xmlStartTag("respcondition", $attrs);
256  // qti conditionvar
257  $a_xml_writer->xmlStartTag("conditionvar");
258  foreach ($answers as $index => $answer)
259  {
260  if ($answer->getPointsChecked() < $answer->getPointsUnchecked())
261  {
262  $a_xml_writer->xmlStartTag("not");
263  }
264  $attrs = array(
265  "respident" => "MCMR"
266  );
267  $a_xml_writer->xmlElement("varequal", $attrs, $index);
268  if ($answer->getPointsChecked() < $answer->getPointsUnchecked())
269  {
270  $a_xml_writer->xmlEndTag("not");
271  }
272  }
273  $a_xml_writer->xmlEndTag("conditionvar");
274  // qti displayfeedback
275  $attrs = array(
276  "feedbacktype" => "Response",
277  "linkrefid" => "response_allcorrect"
278  );
279  $a_xml_writer->xmlElement("displayfeedback", $attrs);
280  $a_xml_writer->xmlEndTag("respcondition");
281  }
282  $feedback_onenotcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
283  $this->object->getId(), false
284  );
285  if (strlen($feedback_onenotcorrect))
286  {
287  $attrs = array(
288  "continue" => "Yes"
289  );
290  $a_xml_writer->xmlStartTag("respcondition", $attrs);
291  // qti conditionvar
292  $a_xml_writer->xmlStartTag("conditionvar");
293  foreach ($answers as $index => $answer)
294  {
295  if ($index > 0)
296  {
297  $a_xml_writer->xmlStartTag("or");
298  }
299  if ($answer->getPointsChecked() >= $answer->getPointsUnchecked())
300  {
301  $a_xml_writer->xmlStartTag("not");
302  }
303  $attrs = array(
304  "respident" => "MCMR"
305  );
306  $a_xml_writer->xmlElement("varequal", $attrs, $index);
307  if ($answer->getPointsChecked() >= $answer->getPointsUnchecked())
308  {
309  $a_xml_writer->xmlEndTag("not");
310  }
311  if ($index > 0)
312  {
313  $a_xml_writer->xmlEndTag("or");
314  }
315  }
316  $a_xml_writer->xmlEndTag("conditionvar");
317  // qti displayfeedback
318  $attrs = array(
319  "feedbacktype" => "Response",
320  "linkrefid" => "response_onenotcorrect"
321  );
322  $a_xml_writer->xmlElement("displayfeedback", $attrs);
323  $a_xml_writer->xmlEndTag("respcondition");
324  }
325  $a_xml_writer->xmlEndTag("resprocessing");
326 
327  // PART III: qti itemfeedback
328  foreach ($answers as $index => $answer)
329  {
330  $linkrefid = "response_$index";
331  $attrs = array(
332  "ident" => $linkrefid,
333  "view" => "All"
334  );
335  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
336  // qti flow_mat
337  $a_xml_writer->xmlStartTag("flow_mat");
338  $fb = $this->object->feedbackOBJ->getSpecificAnswerFeedbackExportPresentation(
339  $this->object->getId(), $index
340  );
341  $this->object->addQTIMaterial($a_xml_writer, $fb);
342  $a_xml_writer->xmlEndTag("flow_mat");
343  $a_xml_writer->xmlEndTag("itemfeedback");
344  }
345  if (strlen($feedback_allcorrect))
346  {
347  $attrs = array(
348  "ident" => "response_allcorrect",
349  "view" => "All"
350  );
351  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
352  // qti flow_mat
353  $a_xml_writer->xmlStartTag("flow_mat");
354  $this->object->addQTIMaterial($a_xml_writer, $feedback_allcorrect);
355  $a_xml_writer->xmlEndTag("flow_mat");
356  $a_xml_writer->xmlEndTag("itemfeedback");
357  }
358  if (strlen($feedback_onenotcorrect))
359  {
360  $attrs = array(
361  "ident" => "response_onenotcorrect",
362  "view" => "All"
363  );
364  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
365  // qti flow_mat
366  $a_xml_writer->xmlStartTag("flow_mat");
367  $this->object->addQTIMaterial($a_xml_writer, $feedback_onenotcorrect);
368  $a_xml_writer->xmlEndTag("flow_mat");
369  $a_xml_writer->xmlEndTag("itemfeedback");
370  }
371 
372  $a_xml_writer->xmlEndTag("item");
373  $a_xml_writer->xmlEndTag("questestinterop");
374 
375  $xml = $a_xml_writer->xmlDumpMem(FALSE);
376  if (!$a_include_header)
377  {
378  $pos = strpos($xml, "?>");
379  $xml = substr($xml, $pos + 2);
380  }
381  return $xml;
382  }
383 }
384 
385 ?>
MULTIPLE_CHOICE_QUESTION_IDENTIFIER
const MULTIPLE_CHOICE_QUESTION_IDENTIFIER
Definition: inc.AssessmentConstants.php:28
ilXmlWriter
XML writer class.
Definition: class.ilXmlWriter.php:17
assQuestionExport
Class for question exports.
Definition: class.assQuestionExport.php:15
assQuestionExport\addGeneralMetadata
addGeneralMetadata(ilXmlWriter $xmlwriter)
Definition: class.assQuestionExport.php:210
ilXmlWriter\xmlHeader
xmlHeader()
Writes xml header public.
Definition: class.ilXmlWriter.php:297
assQuestionExport\addAdditionalContentEditingModeInformation
addAdditionalContentEditingModeInformation(ilXmlWriter $a_xml_writer)
adds a qti meta data field for ilias specific information of "additional content editing mode" (xml w...
Definition: class.assQuestionExport.php:200
assMultipleChoiceExport
Class for multiple choice question exports.
Definition: class.assMultipleChoiceExport.php:15
assMultipleChoiceExport\toXML
toXML($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.
Definition: class.assMultipleChoiceExport.php:26