ILIAS  release_5-0 Revision 5.0.0-1144-gc4397b1f870
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Public Member Functions
assSingleChoiceExport Class Reference
Modules/TestQuestionPool

Class for single choice question exports. More...

+ Inheritance diagram for assSingleChoiceExport:
+ Collaboration diagram for assSingleChoiceExport:

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. More...
 
- Public Member Functions inherited from assQuestionExport
 assQuestionExport (&$a_object)
 assQuestionExport constructor More...
 
 exportFeedbackOnly ($a_xml_writer)
 
 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. More...
 

Additional Inherited Members

- Data Fields inherited from assQuestionExport
 $object
 
- Protected Member Functions inherited from assQuestionExport
 addAnswerSpecificFeedback (ilXmlWriter $a_xml_writer, $answers)
 
 addGenericFeedback (ilXmlWriter $a_xml_writer)
 
 addQtiMetaDataField (ilXmlWriter $a_xml_writer, $fieldLabel, $fieldValue)
 adds a qti meta data field with given name and value to the passed xml writer (xml writer must be in context of opened "qtimetadata" tag) More...
 
 addAdditionalContentEditingModeInformation (ilXmlWriter $a_xml_writer)
 adds a qti meta data field for ilias specific information of "additional content editing mode" (xml writer must be in context of opened "qtimetadata" tag) More...
 
 addGeneralMetadata (ilXmlWriter $xmlwriter)
 

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 15 of file class.assSingleChoiceExport.php.

Member Function Documentation

◆ toXML()

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

Definition at line 26 of file class.assSingleChoiceExport.php.

References assQuestionExport\addAdditionalContentEditingModeInformation(), assQuestionExport\addGeneralMetadata(), SINGLE_CHOICE_QUESTION_IDENTIFIER, and ilXmlWriter\xmlHeader().

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, SINGLE_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" => "MCSR",
93  "rcardinality" => "Single"
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" => "MCSR"
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  }
226 
227  $feedback_allcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
228  $this->object->getId(), true
229  );
230  if (strlen($feedback_allcorrect))
231  {
232  $attrs = array(
233  "continue" => "Yes"
234  );
235  $a_xml_writer->xmlStartTag("respcondition", $attrs);
236  // qti conditionvar
237  $a_xml_writer->xmlStartTag("conditionvar");
238  $bestindex = 0;
239  $maxpoints = 0;
240  foreach ($answers as $index => $answer)
241  {
242  if ($answer->getPoints() > $maxpoints)
243  {
244  $maxpoints = $answer->getPoints();
245  $bestindex = $index;
246  }
247  }
248  $attrs = array(
249  "respident" => "MCSR"
250  );
251  $a_xml_writer->xmlElement("varequal", $attrs, $bestindex);
252  $a_xml_writer->xmlEndTag("conditionvar");
253  // qti displayfeedback
254  $attrs = array(
255  "feedbacktype" => "Response",
256  "linkrefid" => "response_allcorrect"
257  );
258  $a_xml_writer->xmlElement("displayfeedback", $attrs);
259  $a_xml_writer->xmlEndTag("respcondition");
260  }
261 
262  $feedback_onenotcorrect = $this->object->feedbackOBJ->getGenericFeedbackExportPresentation(
263  $this->object->getId(), false
264  );
265  if (strlen($feedback_onenotcorrect))
266  {
267  $attrs = array(
268  "continue" => "Yes"
269  );
270  $a_xml_writer->xmlStartTag("respcondition", $attrs);
271  // qti conditionvar
272  $a_xml_writer->xmlStartTag("conditionvar");
273  $bestindex = 0;
274  $maxpoints = 0;
275  foreach ($answers as $index => $answer)
276  {
277  if ($answer->getPoints() > $maxpoints)
278  {
279  $maxpoints = $answer->getPoints();
280  $bestindex = $index;
281  }
282  }
283  $attrs = array(
284  "respident" => "MCSR"
285  );
286  $a_xml_writer->xmlStartTag("not");
287  $a_xml_writer->xmlElement("varequal", $attrs, $bestindex);
288  $a_xml_writer->xmlEndTag("not");
289  $a_xml_writer->xmlEndTag("conditionvar");
290  // qti displayfeedback
291  $attrs = array(
292  "feedbacktype" => "Response",
293  "linkrefid" => "response_onenotcorrect"
294  );
295  $a_xml_writer->xmlElement("displayfeedback", $attrs);
296  $a_xml_writer->xmlEndTag("respcondition");
297  }
298 
299  $a_xml_writer->xmlEndTag("resprocessing");
300 
301  // PART III: qti itemfeedback
302  foreach ($answers as $index => $answer)
303  {
304  $linkrefid = "response_$index";
305  $attrs = array(
306  "ident" => $linkrefid,
307  "view" => "All"
308  );
309  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
310  // qti flow_mat
311  $a_xml_writer->xmlStartTag("flow_mat");
312  $fb = $this->object->feedbackOBJ->getSpecificAnswerFeedbackExportPresentation(
313  $this->object->getId(), $index
314  );
315  $this->object->addQTIMaterial($a_xml_writer, $fb);
316  $a_xml_writer->xmlEndTag("flow_mat");
317  $a_xml_writer->xmlEndTag("itemfeedback");
318  }
319  if (strlen($feedback_allcorrect))
320  {
321  $attrs = array(
322  "ident" => "response_allcorrect",
323  "view" => "All"
324  );
325  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
326  // qti flow_mat
327  $a_xml_writer->xmlStartTag("flow_mat");
328  $this->object->addQTIMaterial($a_xml_writer, $feedback_allcorrect);
329  $a_xml_writer->xmlEndTag("flow_mat");
330  $a_xml_writer->xmlEndTag("itemfeedback");
331  }
332  if (strlen($feedback_onenotcorrect))
333  {
334  $attrs = array(
335  "ident" => "response_onenotcorrect",
336  "view" => "All"
337  );
338  $a_xml_writer->xmlStartTag("itemfeedback", $attrs);
339  // qti flow_mat
340  $a_xml_writer->xmlStartTag("flow_mat");
341  $this->object->addQTIMaterial($a_xml_writer, $feedback_onenotcorrect);
342  $a_xml_writer->xmlEndTag("flow_mat");
343  $a_xml_writer->xmlEndTag("itemfeedback");
344  }
345 
346  $a_xml_writer->xmlEndTag("item");
347  $a_xml_writer->xmlEndTag("questestinterop");
348 
349  $xml = $a_xml_writer->xmlDumpMem(FALSE);
350  if (!$a_include_header)
351  {
352  $pos = strpos($xml, "?>");
353  $xml = substr($xml, $pos + 2);
354  }
355  return $xml;
356  }
ilXmlWriter
XML writer class.
Definition: class.ilXmlWriter.php:17
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
SINGLE_CHOICE_QUESTION_IDENTIFIER
const SINGLE_CHOICE_QUESTION_IDENTIFIER
Definition: inc.AssessmentConstants.php:29
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