type = FILL_IN_BLANKS;
$this->isContent = $this->getIsContent();
}
/**
* @inheritdoc
*/
public function createAnswersForm($form)
{
$defaults = array();
if (!empty($this->id)) {
$objectAnswer = new Answer($this->id);
$answer = $objectAnswer->selectAnswer(1);
$listAnswersInfo = self::getAnswerInfo($answer);
if ($listAnswersInfo['switchable']) {
$defaults['multiple_answer'] = 1;
} else {
$defaults['multiple_answer'] = 0;
}
//take the complete string except after the last '::'
$defaults['answer'] = $listAnswersInfo['text'];
$defaults['select_separator'] = $listAnswersInfo['blankseparatornumber'];
$blankSeparatorNumber = $listAnswersInfo['blankseparatornumber'];
} else {
$defaults['answer'] = get_lang('DefaultTextInBlanks');
$defaults['select_separator'] = 0;
$blankSeparatorNumber = 0;
}
$blankSeparatorStart = self::getStartSeparator($blankSeparatorNumber);
$blankSeparatorEnd = self::getEndSeparator($blankSeparatorNumber);
$setWeightAndSize = '';
if (isset($listAnswersInfo) && count($listAnswersInfo['tabweighting']) > 0) {
foreach ($listAnswersInfo['tabweighting'] as $i => $weighting) {
$setWeightAndSize .= 'document.getElementById("weighting['.$i.']").value = "'.$weighting.'";';
}
foreach ($listAnswersInfo['tabinputsize'] as $i => $sizeOfInput) {
$setWeightAndSize .= 'document.getElementById("sizeofinput['.$i.']").value = "'.$sizeOfInput.'";';
$setWeightAndSize .= 'document.getElementById("samplesize['.$i.']").style.width = "'.$sizeOfInput.'px";';
}
}
echo '';
// answer
$form->addLabel(
null,
get_lang('TypeTextBelow').', '.get_lang('And').' '.get_lang('UseTagForBlank')
);
$form->addElement(
'html_editor',
'answer',
Display::return_icon('fill_field.png'),
['id' => 'answer'],
array('ToolbarSet' => 'TestQuestionDescription')
);
$form->addRule('answer', get_lang('GiveText'), 'required');
//added multiple answers
$form->addElement('checkbox', 'multiple_answer', '', get_lang('FillInBlankSwitchable'));
$form->addElement(
'select',
'select_separator',
get_lang("SelectFillTheBlankSeparator"),
self::getAllowedSeparatorForSelect(),
' id="select_separator" style="width:150px" onchange="changeBlankSeparator()" '
);
$form->addLabel(
null,
''
);
$form->addHtml('');
global $text;
// setting the save button here and not in the question class.php
$form->addHtml('
'.get_lang('DefineBlanks').'
');
$form->addButtonSave($text, 'submitQuestion');
if (!empty($this->id)) {
$form->setDefaults($defaults);
} else {
if ($this->isContent == 1) {
$form->setDefaults($defaults);
}
}
}
/**
* Function which creates the form to create/edit the answers of the question
* @param FormValidator $form
*/
public function processAnswersCreation($form)
{
$answer = $form->getSubmitValue('answer');
// Due the ckeditor transform the elements to their HTML value
//$answer = api_html_entity_decode($answer, ENT_QUOTES, $charset);
//$answer = htmlentities(api_utf8_encode($answer));
// remove the "::" eventually written by the user
$answer = str_replace('::', '', $answer);
// remove starting and ending space and
$answer = api_preg_replace("/\xc2\xa0/", " ", $answer);
// start and end separator
$blankStartSeparator = self::getStartSeparator($form->getSubmitValue('select_separator'));
$blankEndSeparator = self::getEndSeparator($form->getSubmitValue('select_separator'));
$blankStartSeparatorRegexp = self::escapeForRegexp($blankStartSeparator);
$blankEndSeparatorRegexp = self::escapeForRegexp($blankEndSeparator);
// remove spaces at the beginning and the end of text in square brackets
$answer = preg_replace_callback(
"/".$blankStartSeparatorRegexp."[^]]+".$blankEndSeparatorRegexp."/",
function($matches) use ($blankStartSeparator, $blankEndSeparator) {
$matchingResult = $matches[0];
$matchingResult = trim($matchingResult, $blankStartSeparator);
$matchingResult = trim($matchingResult, $blankEndSeparator);
$matchingResult = trim($matchingResult);
// remove forbidden chars
$matchingResult = str_replace("/\\/", "", $matchingResult);
$matchingResult = str_replace('/"/', "", $matchingResult);
return $blankStartSeparator.$matchingResult.$blankEndSeparator;
},
$answer
);
// get the blanks weightings
$nb = preg_match_all(
'/'.$blankStartSeparatorRegexp.'[^'.$blankStartSeparatorRegexp.']*'.$blankEndSeparatorRegexp.'/',
$answer,
$blanks
);
if (isset($_GET['editQuestion'])) {
$this->weighting = 0;
}
/* if we have some [tobefound] in the text
build the string to save the following in the answers table
I use a [computer] and a [pen].
becomes
I use a [computer] and a [pen].
::100,50:100,50@1
++++++++-------**
--- -- --- -- -
A B (C) (D)(E)
+++++++ : required, weighting of each words
------- : optional, input width to display, 200 if not present
** : equal @1 if "Allow answers order switches" has been checked, @ otherwise
A : weighting for the word [computer]
B : weighting for the word [pen]
C : input width for the word [computer]
D : input width for the word [pen]
E : equal @1 if "Allow answers order switches" has been checked, @ otherwise
*/
if ($nb > 0) {
$answer .= '::';
// weighting
for ($i = 0; $i < $nb; ++$i) {
// enter the weighting of word $i
$answer .= $form->getSubmitValue('weighting['.$i.']');
// not the last word, add ","
if ($i != $nb - 1) {
$answer .= ",";
}
// calculate the global weighting for the question
$this -> weighting += $form->getSubmitValue('weighting['.$i.']');
}
// input width
$answer .= ":";
for ($i = 0; $i < $nb; ++$i) {
// enter the width of input for word $i
$answer .= $form->getSubmitValue('sizeofinput['.$i.']');
// not the last word, add ","
if ($i != $nb - 1) {
$answer .= ",";
}
}
}
// write the blank separator code number
// see function getAllowedSeparator
/*
0 [...]
1 {...}
2 (...)
3 *...*
4 #...#
5 %...%
6 $...$
*/
$answer .= ":".$form->getSubmitValue('select_separator');
// Allow answers order switches
$is_multiple = $form -> getSubmitValue('multiple_answer');
$answer .= '@'.$is_multiple;
$this->save();
$objAnswer = new Answer($this->id);
$objAnswer->createAnswer($answer, 0, '', 0, 1);
$objAnswer->save();
}
/**
* @param null $feedback_type
* @param null $counter
* @param null $score
* @return string
*/
public function return_header($feedback_type = null, $counter = null, $score = null)
{
$header = parent::return_header($feedback_type, $counter, $score);
$header .= '
'.get_lang("Answer").'
';
return $header;
}
/**
* @param int $currentQuestion
* @param int $questionId
* @param string $correctItem
* @param array $attributes
* @param string $answer
* @param array $listAnswersInfo
* @param boolean $displayForStudent
* @param int $inBlankNumber
* @return string
*/
public static function getFillTheBlankHtml(
$currentQuestion,
$questionId,
$correctItem,
$attributes,
$answer,
$listAnswersInfo,
$displayForStudent,
$inBlankNumber
) {
$result = '';
$inTabTeacherSolution = $listAnswersInfo['tabwords'];
$inTeacherSolution = $inTabTeacherSolution[$inBlankNumber];
switch (self::getFillTheBlankAnswerType($inTeacherSolution)) {
case self::FILL_THE_BLANK_MENU:
$selected = '';
// the blank menu
// display a menu from answer separated with |
// if display for student, shuffle the correct answer menu
$listMenu = self::getFillTheBlankMenuAnswers($inTeacherSolution, $displayForStudent);
$resultOptions = ['' => '--'];
foreach ($listMenu as $item) {
$item = self::trimOption($item);
$resultOptions[$item] = $item;
}
for ($k = 0; $k < count($listMenu); $k++) {
if ($correctItem == $listMenu[$k]) {
$selected = $k;
break;
}
// if in teacher view, display the first item by default, which is the right answer
if ($k == 0 && !$displayForStudent) {
$selected = $k;
break;
}
}
$result = Display::select(
"choice[$questionId][]",
$resultOptions,
$selected,
['class' => 'selectpicker'],
false
);
break;
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
//no break
case self::FILL_THE_BLANK_STANDARD:
default:
$attributes['id'] = 'choice_id_'.$currentQuestion.'_'.$inBlankNumber;
$result = Display::input(
'text',
"choice[$questionId][]",
$correctItem,
$attributes
);
break;
}
return $result;
}
private static function trimOption($text)
{
$converted = strtr($text, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES)));
$trimmed = trim($converted, chr(0xC2).chr(0xA0).' ');
return $trimmed;
}
/**
* Return an array with the different choices available
* when the answers between bracket show as a menu
* @param string $correctAnswer
* @param bool $displayForStudent true if we want to shuffle the choices of the menu for students
*
* @return array
*/
public static function getFillTheBlankMenuAnswers($correctAnswer, $displayForStudent)
{
$list = api_preg_split("/\|/", $correctAnswer);
if ($displayForStudent) {
shuffle($list);
}
return $list;
}
/**
* Return the array index of the student answer
* @param string $correctAnswer the menu Choice1|Choice2|Choice3
* @param string $studentAnswer the student answer must be Choice1 or Choice2 or Choice3
*
* @return int in the example 0 1 or 2 depending of the choice of the student
*/
public static function getFillTheBlankMenuAnswerNum($correctAnswer, $studentAnswer)
{
$listChoices = self::getFillTheBlankMenuAnswers($correctAnswer, false);
foreach ($listChoices as $num => $value) {
if ($value == $studentAnswer) {
return $num;
}
}
// should not happened, because student choose the answer in a menu of possible answers
return -1;
}
/**
* Return the possible answer if the answer between brackets is a multiple choice menu
* @param string $correctAnswer
*
* @return array
*/
public static function getFillTheBlankSeveralAnswers($correctAnswer)
{
// is answer||Answer||response||Response , mean answer or Answer ...
$listSeveral = api_preg_split("/\|\|/", $correctAnswer);
return $listSeveral;
}
/**
* Return true if student answer is right according to the correctAnswer
* it is not as simple as equality, because of the type of Fill The Blank question
* eg : studentAnswer = 'Un' and correctAnswer = 'Un||1||un'
* @param string $studentAnswer [studentanswer] of the info array of the answer field
* @param string $correctAnswer [tabwords] of the info array of the answer field
*
* @return bool
*/
public static function isGoodStudentAnswer($studentAnswer, $correctAnswer)
{
switch (self::getFillTheBlankAnswerType($correctAnswer)) {
case self::FILL_THE_BLANK_MENU:
$listMenu = self::getFillTheBlankMenuAnswers($correctAnswer, false);
$result = self::trimOption($listMenu[0]) == $studentAnswer;
break;
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
// the answer must be one of the choice made
$listSeveral = self::getFillTheBlankSeveralAnswers($correctAnswer);
$listSeveral = array_map(function ($item) {
return self::trimOption($item);
}, $listSeveral);
$result = in_array($studentAnswer, $listSeveral);
break;
case self::FILL_THE_BLANK_STANDARD:
default:
$result = $studentAnswer == self::trimOption($correctAnswer);
break;
}
return $result;
}
/**
* @param string $correctAnswer
*
* @return int
*/
public static function getFillTheBlankAnswerType($correctAnswer)
{
if (api_strpos($correctAnswer, "|") && !api_strpos($correctAnswer, "||")) {
return self::FILL_THE_BLANK_MENU;
} elseif (api_strpos($correctAnswer, "||")) {
return self::FILL_THE_BLANK_SEVERAL_ANSWER;
} else {
return self::FILL_THE_BLANK_STANDARD;
}
}
/**
* Return information about the answer
* @param string $userAnswer the text of the answer of the question
* @param bool $isStudentAnswer true if it's a student answer false the empty question model
*
* @return array of information about the answer
*/
public static function getAnswerInfo($userAnswer = "", $isStudentAnswer = false)
{
$listAnswerResults = array();
$listAnswerResults['text'] = '';
$listAnswerResults['wordsCount'] = 0;
$listAnswerResults['tabwordsbracket'] = array();
$listAnswerResults['tabwords'] = array();
$listAnswerResults['tabweighting'] = array();
$listAnswerResults['tabinputsize'] = array();
$listAnswerResults['switchable'] = '';
$listAnswerResults['studentanswer'] = array();
$listAnswerResults['studentscore'] = array();
$listAnswerResults['blankseparatornumber'] = 0;
$listDoubleColon = array();
api_preg_match("/(.*)::(.*)$/s", $userAnswer, $listResult);
if (count($listResult) < 2) {
$listDoubleColon[] = '';
$listDoubleColon[] = '';
} else {
$listDoubleColon[] = $listResult[1];
$listDoubleColon[] = $listResult[2];
}
$listAnswerResults['systemstring'] = $listDoubleColon[1];
// make sure we only take the last bit to find special marks
$listArobaseSplit = explode('@', $listDoubleColon[1]);
if (count($listArobaseSplit) < 2) {
$listArobaseSplit[1] = '';
}
// take the complete string except after the last '::'
$listDetails = explode(":", $listArobaseSplit[0]);
// < number of item after the ::[score]:[size]:[separator_id]@ , here there are 3
if (count($listDetails) < 3) {
$listWeightings = explode(',', $listDetails[0]);
$listSizeOfInput = array();
for ($i = 0; $i < count($listWeightings); $i++) {
$listSizeOfInput[] = 200;
}
$blankSeparatorNumber = 0; // 0 is [...]
} else {
$listWeightings = explode(',', $listDetails[0]);
$listSizeOfInput = explode(',', $listDetails[1]);
$blankSeparatorNumber = $listDetails[2];
}
$listAnswerResults['text'] = $listDoubleColon[0];
$listAnswerResults['tabweighting'] = $listWeightings;
$listAnswerResults['tabinputsize'] = $listSizeOfInput;
$listAnswerResults['switchable'] = $listArobaseSplit[1];
$listAnswerResults['blankseparatorstart'] = self::getStartSeparator($blankSeparatorNumber);
$listAnswerResults['blankseparatorend'] = self::getEndSeparator($blankSeparatorNumber);
$listAnswerResults['blankseparatornumber'] = $blankSeparatorNumber;
$blankCharStart = self::getStartSeparator($blankSeparatorNumber);
$blankCharEnd = self::getEndSeparator($blankSeparatorNumber);
$blankCharStartForRegexp = self::escapeForRegexp($blankCharStart);
$blankCharEndForRegexp = self::escapeForRegexp($blankCharEnd);
// get all blanks words
$listAnswerResults['wordsCount'] = api_preg_match_all(
'/'.$blankCharStartForRegexp.'[^'.$blankCharEndForRegexp.']*'.$blankCharEndForRegexp.'/',
$listDoubleColon[0],
$listWords
);
if ($listAnswerResults['wordsCount'] > 0) {
$listAnswerResults['tabwordsbracket'] = $listWords[0];
// remove [ and ] in string
array_walk(
$listWords[0],
function(&$value, $key, $tabBlankChar) {
$trimChars = '';
for ($i = 0; $i < count($tabBlankChar); $i++) {
$trimChars .= $tabBlankChar[$i];
}
$value = trim($value, $trimChars);
},
array($blankCharStart, $blankCharEnd)
);
$listAnswerResults['tabwords'] = $listWords[0];
}
// get all common words
$commonWords = api_preg_replace(
'/'.$blankCharStartForRegexp.'[^'.$blankCharEndForRegexp.']*'.$blankCharEndForRegexp.'/',
"::",
$listDoubleColon[0]
);
// if student answer, the second [] is the student answer,
// the third is if student scored or not
$listBrackets = array();
$listWords = array();
if ($isStudentAnswer) {
for ($i = 0; $i < count($listAnswerResults['tabwords']); $i++) {
$listBrackets[] = $listAnswerResults['tabwordsbracket'][$i];
$listWords[] = $listAnswerResults['tabwords'][$i];
if ($i + 1 < count($listAnswerResults['tabwords'])) {
// should always be
$i++;
}
$listAnswerResults['studentanswer'][] = $listAnswerResults['tabwords'][$i];
if ($i + 1 < count($listAnswerResults['tabwords'])) {
// should always be
$i++;
}
$listAnswerResults['studentscore'][] = $listAnswerResults['tabwords'][$i];
}
$listAnswerResults['tabwords'] = $listWords;
$listAnswerResults['tabwordsbracket'] = $listBrackets;
// if we are in student view, we've got 3 times :::::: for common words
$commonWords = api_preg_replace("/::::::/", "::", $commonWords);
}
$listAnswerResults['commonwords'] = explode("::", $commonWords);
return $listAnswerResults;
}
/**
* Return an array of student state answers for fill the blank questions
* for each students that answered the question
* -2 : didn't answer
* -1 : student answer is wrong
* 0 : student answer is correct
* >0 : for fill the blank question with choice menu, is the index of the student answer (right answer indice is 0)
*
* @param integer $testId
* @param integer $questionId
* @param $studentsIdList
* @param string $startDate
* @param string $endDate
* @param bool $useLastAnsweredAttempt
* @return array
* (
* [student_id] => Array
* (
* [first fill the blank for question] => -1
* [second fill the blank for question] => 2
* [third fill the blank for question] => -1
* )
* )
*/
public static function getFillTheBlankTabResult(
$testId,
$questionId,
$studentsIdList,
$startDate,
$endDate,
$useLastAnsweredAttempt = true
) {
$tblTrackEAttempt = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
$tblTrackEExercise = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
$courseId = api_get_course_int_id();
// If no user has answered questions, no need to go further. Return empty array.
if (empty($studentsIdList)) {
return array();
}
// request to have all the answers of student for this question
// student may have doing it several time
// student may have not answered the bracket id, in this case, is result of the answer is empty
// we got the less recent attempt first
$sql = 'SELECT * FROM '.$tblTrackEAttempt.' tea
LEFT JOIN '.$tblTrackEExercise.' tee
ON
tee.exe_id = tea.exe_id AND
tea.c_id = '.$courseId.' AND
exe_exo_id = '.$testId.'
WHERE
tee.c_id = '.$courseId.' AND
question_id = '.$questionId.' AND
tea.user_id IN ('.implode(',', $studentsIdList).') AND
tea.tms >= "'.$startDate.'" AND
tea.tms <= "'.$endDate.'"
ORDER BY user_id, tea.exe_id;
';
$res = Database::query($sql);
$tabUserResult = array();
// foreach attempts for all students starting with his older attempt
while ($data = Database::fetch_array($res)) {
$tabAnswer = self::getAnswerInfo($data['answer'], true);
// for each bracket to find in this question
foreach ($tabAnswer['studentanswer'] as $bracketNumber => $studentAnswer) {
if ($tabAnswer['studentanswer'][$bracketNumber] != '') {
// student has answered this bracket, cool
switch (self::getFillTheBlankAnswerType($tabAnswer['tabwords'][$bracketNumber])) {
case self::FILL_THE_BLANK_MENU:
// get the indice of the choosen answer in the menu
// we know that the right answer is the first entry of the menu, ie 0
// (remember, menu entries are shuffled when taking the test)
$tabUserResult[$data['user_id']][$bracketNumber] = self::getFillTheBlankMenuAnswerNum(
$tabAnswer['tabwords'][$bracketNumber],
$tabAnswer['studentanswer'][$bracketNumber]
);
break;
default:
if (self::isGoodStudentAnswer(
$tabAnswer['studentanswer'][$bracketNumber],
$tabAnswer['tabwords'][$bracketNumber]
)
) {
$tabUserResult[$data['user_id']][$bracketNumber] = 0; // right answer
} else {
$tabUserResult[$data['user_id']][$bracketNumber] = -1; // wrong answer
}
}
} else {
// student didn't answer this bracket
if ($useLastAnsweredAttempt) {
// if we take into account the last answered attempt
if (!isset($tabUserResult[$data['user_id']][$bracketNumber])) {
$tabUserResult[$data['user_id']][$bracketNumber] = -2; // not answered
}
} else {
// we take the last attempt, even if the student answer the question before
$tabUserResult[$data['user_id']][$bracketNumber] = -2; // not answered
}
}
}
}
return $tabUserResult;
}
/**
* Return the number of student that give at leat an answer in the fill the blank test
* @param array $resultList
* @return int
*/
public static function getNbResultFillBlankAll($resultList)
{
$outRes = 0;
// for each student in group
foreach ($resultList as $userId => $tabValue) {
$found = false;
// for each bracket, if student has at least one answer ( choice > -2) then he pass the question
foreach ($tabValue as $i => $choice) {
if ($choice > -2 && !$found) {
$outRes++;
$found = true;
}
}
}
return $outRes;
}
/**
* Replace the occurrence of blank word with [correct answer][student answer][answer is correct]
* @param array $listWithStudentAnswer
*
* @return string
*/
public static function getAnswerInStudentAttempt($listWithStudentAnswer)
{
$separatorStart = $listWithStudentAnswer['blankseparatorstart'];
$separatorEnd = $listWithStudentAnswer['blankseparatorend'];
// lets rebuild the sentence with [correct answer][student answer][answer is correct]
$result = '';
for ($i = 0; $i < count($listWithStudentAnswer['commonwords']) - 1; $i++) {
$result .= $listWithStudentAnswer['commonwords'][$i];
$result .= $listWithStudentAnswer['tabwordsbracket'][$i];
$result .= $separatorStart.$listWithStudentAnswer['studentanswer'][$i].$separatorEnd;
$result .= $separatorStart.$listWithStudentAnswer['studentscore'][$i].$separatorEnd;
}
$result .= $listWithStudentAnswer['commonwords'][$i];
$result .= "::";
// add the system string
$result .= $listWithStudentAnswer['systemstring'];
return $result;
}
/**
* This function is the same than the js one above getBlankSeparatorRegexp
* @param string $inChar
*
* @return string
*/
public static function escapeForRegexp($inChar)
{
$listChars = [
".",
"+",
"*",
"?",
"[",
"^",
"]",
"$",
"(",
")",
"{",
"}",
"=",
"!",
">",
"|",
":",
"-",
")",
];
if (in_array($inChar, $listChars)) {
return "\\".$inChar;
} else {
return $inChar;
}
}
/**
* return $text protected for use in regexp
* @param string $text
*
* @return string
*/
public static function getRegexpProtected($text)
{
$listRegexpCharacters = [
"/",
".",
"+",
"*",
"?",
"[",
"^",
"]",
"$",
"(",
")",
"{",
"}",
"=",
"!",
">",
"|",
":",
"-",
")",
];
$result = $text;
for ($i = 0; $i < count($listRegexpCharacters); $i++) {
$result = str_replace($listRegexpCharacters[$i], "\\".$listRegexpCharacters[$i], $result);
}
return $result;
}
/**
* This function must be the same than the js one getSeparatorFromNumber above
* @return array
*/
public static function getAllowedSeparator()
{
$fillBlanksAllowedSeparator = array(
array('[', ']'),
array('{', '}'),
array('(', ')'),
array('*', '*'),
array('#', '#'),
array('%', '%'),
array('$', '$'),
);
return $fillBlanksAllowedSeparator;
}
/**
* return the start separator for answer
* @param string $number
*
* @return string
*/
public static function getStartSeparator($number)
{
$listSeparators = self::getAllowedSeparator();
return $listSeparators[$number][0];
}
/**
* return the end separator for answer
* @param string $number
*
* @return string
*/
public static function getEndSeparator($number)
{
$listSeparators = self::getAllowedSeparator();
return $listSeparators[$number][1];
}
/**
* Return as a description text, array of allowed separators for question
* eg: array("[...]", "(...)")
* @return array
*/
public static function getAllowedSeparatorForSelect()
{
$listResults = array();
$fillBlanksAllowedSeparator = self::getAllowedSeparator();
for ($i = 0; $i < count($fillBlanksAllowedSeparator); $i++) {
$listResults[] = $fillBlanksAllowedSeparator[$i][0]."...".$fillBlanksAllowedSeparator[$i][1];
}
return $listResults;
}
/**
* return the code number of the separator for the question
* @param string $startSeparator
* @param string $endSeparator
*
* @return int
*/
public function getDefaultSeparatorNumber($startSeparator, $endSeparator)
{
$listSeparators = self::getAllowedSeparator();
$result = 0;
for ($i = 0; $i < count($listSeparators); $i++) {
if ($listSeparators[$i][0] == $startSeparator &&
$listSeparators[$i][1] == $endSeparator
) {
$result = $i;
}
}
return $result;
}
/**
* return the HTML display of the answer
* @param string $answer
* @param int $feedbackType
* @param bool $resultsDisabled
* @param bool $showTotalScoreAndUserChoices
* @return string
*/
public static function getHtmlDisplayForAnswer(
$answer,
$feedbackType,
$resultsDisabled = false,
$showTotalScoreAndUserChoices = false
) {
$result = '';
$listStudentAnswerInfo = self::getAnswerInfo($answer, true);
if ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ATTEMPT_SHOW_ANSWERS_LAST_ATTEMPT) {
if ($showTotalScoreAndUserChoices) {
$resultsDisabled = false;
} else {
$resultsDisabled = true;
}
}
// rebuild the answer with good HTML style
// this is the student answer, right or wrong
for ($i = 0; $i < count($listStudentAnswerInfo['studentanswer']); $i++) {
if ($listStudentAnswerInfo['studentscore'][$i] == 1) {
$listStudentAnswerInfo['studentanswer'][$i] = self::getHtmlRightAnswer(
$listStudentAnswerInfo['studentanswer'][$i],
$listStudentAnswerInfo['tabwords'][$i],
$feedbackType,
$resultsDisabled,
$showTotalScoreAndUserChoices
);
} else {
$listStudentAnswerInfo['studentanswer'][$i] = self::getHtmlWrongAnswer(
$listStudentAnswerInfo['studentanswer'][$i],
$listStudentAnswerInfo['tabwords'][$i],
$feedbackType,
$resultsDisabled,
$showTotalScoreAndUserChoices
);
}
}
// rebuild the sentence with student answer inserted
for ($i = 0; $i < count($listStudentAnswerInfo['commonwords']); $i++) {
$result .= isset($listStudentAnswerInfo['commonwords'][$i]) ? $listStudentAnswerInfo['commonwords'][$i] : '';
$result .= isset($listStudentAnswerInfo['studentanswer'][$i]) ? $listStudentAnswerInfo['studentanswer'][$i] : '';
}
// the last common word (should be )
$result .= isset($listStudentAnswerInfo['commonwords'][$i]) ? $listStudentAnswerInfo['commonwords'][$i] : '';
return $result;
}
/**
* return the HTML code of answer for correct and wrong answer
* @param string $answer
* @param string $correct
* @param string $right
* @param int $feedbackType
* @param bool $resultsDisabled
* @param bool $showTotalScoreAndUserChoices
* @return string
*/
public static function getHtmlAnswer(
$answer,
$correct,
$right,
$feedbackType,
$resultsDisabled = false,
$showTotalScoreAndUserChoices = false
) {
$hideExpectedAnswer = false;
if ($feedbackType == 0 && ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ONLY)) {
$hideExpectedAnswer = true;
}
if ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ATTEMPT_SHOW_ANSWERS_LAST_ATTEMPT) {
if ($showTotalScoreAndUserChoices) {
$hideExpectedAnswer = false;
} else {
$hideExpectedAnswer = true;
}
}
$style = "color: green";
if (!$right) {
$style = "color: red; text-decoration: line-through;";
}
$type = self::getFillTheBlankAnswerType($correct);
switch ($type) {
case self::FILL_THE_BLANK_MENU:
$correctAnswerHtml = '';
$listPossibleAnswers = self::getFillTheBlankMenuAnswers($correct, false);
$correctAnswerHtml .= "".$listPossibleAnswers[0]."";
$correctAnswerHtml .= " (";
for ($i = 1; $i < count($listPossibleAnswers); $i++) {
$correctAnswerHtml .= $listPossibleAnswers[$i];
if ($i != count($listPossibleAnswers) - 1) {
$correctAnswerHtml .= " | ";
}
}
$correctAnswerHtml .= ")";
break;
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
$listCorrects = explode("||", $correct);
$firstCorrect = $correct;
if (count($listCorrects) > 0) {
$firstCorrect = $listCorrects[0];
}
$correctAnswerHtml = "".$firstCorrect."";
break;
case self::FILL_THE_BLANK_STANDARD:
default:
$correctAnswerHtml = "".$correct."";
}
if ($hideExpectedAnswer) {
$correctAnswerHtml = " - ";
}
$result = "";
$result .= "".$answer."";
$result .= " / ";
$result .= $correctAnswerHtml;
$result .= "";
return $result;
}
/**
* return HTML code for correct answer
* @param string $answer
* @param string $correct
* @param bool $resultsDisabled
*
* @return string
*/
public static function getHtmlRightAnswer(
$answer,
$correct,
$feedbackType,
$resultsDisabled = false,
$showTotalScoreAndUserChoices = false
) {
return self::getHtmlAnswer(
$answer,
$correct,
true,
$feedbackType,
$resultsDisabled,
$showTotalScoreAndUserChoices
);
}
/**
* return HTML code for wrong answer
* @param string $answer
* @param string $correct
* @param bool $resultsDisabled
*
* @return string
*/
public static function getHtmlWrongAnswer(
$answer,
$correct,
$feedbackType,
$resultsDisabled = false,
$showTotalScoreAndUserChoices = false
) {
return self::getHtmlAnswer(
$answer,
$correct,
false,
$feedbackType,
$resultsDisabled,
$showTotalScoreAndUserChoices
);
}
/**
* Check if a answer is correct by its text
* @param string $answerText
* @return bool
*/
public static function isCorrect($answerText)
{
$answerInfo = self::getAnswerInfo($answerText, true);
$correctAnswerList = $answerInfo['tabwords'];
$studentAnswer = $answerInfo['studentanswer'];
$isCorrect = true;
foreach ($correctAnswerList as $i => $correctAnswer) {
$isGoodStudentAnswer = self::isGoodStudentAnswer($studentAnswer[$i], $correctAnswer);
$isCorrect = $isCorrect && $isGoodStudentAnswer;
}
return $isCorrect;
}
/**
* Clear the answer entered by student
* @param string $answer
* @return string
*/
public static function clearStudentAnswer($answer)
{
$answer = htmlentities(api_utf8_encode($answer), ENT_QUOTES);
$answer = str_replace(''', ''', $answer); // fix apostrophe
$answer = api_preg_replace('/\s\s+/', ' ', $answer); // replace excess white spaces
$answer = strtr($answer, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES)));
return trim($answer);
}
}