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<?php |
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/* For licensing terms, see /license.txt */ |
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use Webit\Util\EvalMath\EvalMath; |
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/** |
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* Class CalculatedAnswer |
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* This class contains calculated answer form and answer processing functions. |
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* |
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* @author Imanol Losada |
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*/ |
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class CalculatedAnswer extends Question |
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{ |
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public $typePicture = 'calculated_answer.png'; |
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public $explanationLangVar = 'CalculatedAnswer'; |
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/** |
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* Constructor. |
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*/ |
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public function __construct() |
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{ |
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parent::__construct(); |
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$this->type = CALCULATED_ANSWER; |
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$this->isContent = $this->getIsContent(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function createAnswersForm($form) |
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{ |
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$defaults = []; |
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$defaults['answer'] = get_lang('DefaultTextInBlanks'); |
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if (!empty($this->iid)) { |
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$objAnswer = new Answer($this->iid); |
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$preArray = explode('@@', $objAnswer->selectAnswer(1)); |
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$defaults['formula'] = array_pop($preArray); |
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$defaults['answer'] = array_shift($preArray); |
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$defaults['answer'] = preg_replace("/\[.*\]/", '', $defaults['answer']); |
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$defaults['weighting'] = $this->weighting; |
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} |
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$lowestValue = '1.00'; |
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$highestValue = '20.00'; |
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// javascript // |
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echo '<script> |
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function parseTextNumber(textNumber, floatValue) { |
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if (textNumber.indexOf(".") > -1) { |
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textNumber = parseFloat(textNumber); |
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floatValue.exists = "true"; |
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} else { |
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textNumber = parseInt(textNumber); |
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} |
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return textNumber; |
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} |
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function updateRandomValue(element) { |
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// "floatValue" helps to distinguish between an integer (10) and a float with all 0 decimals (10.00) |
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var floatValue = { exists: "false" }; |
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var index = (element.name).match(/\[[^\]]*\]/g); |
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var lowestValue = parseTextNumber(document.getElementById("lowestValue"+index).value, floatValue); |
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var highestValue = parseTextNumber(document.getElementById("highestValue"+index).value, floatValue); |
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var result = Math.random() * (highestValue - lowestValue) + lowestValue; |
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if (floatValue.exists == "true") { |
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result = parseFloat(result).toFixed(2); |
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} else { |
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result = parseInt(result); |
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} |
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document.getElementById("randomValue"+index).innerHTML = "'.get_lang("ExampleValue").': " + result; |
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} |
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CKEDITOR.on("instanceCreated", function(e) { |
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if (e.editor.name === "answer") { |
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e.editor.on("change", updateBlanks); |
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} |
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}); |
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var firstTime = true; |
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function updateBlanks(e) { |
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if (firstTime) { |
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field = document.getElementById("answer"); |
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var answer = field.value; |
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} else { |
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var answer = e.editor.getData(); |
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} |
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var blanks = answer.match(/\[[^\]]*\]/g); |
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var fields = "<div class=\"form-group\"><label class=\"col-sm-2\">'.get_lang('VariableRanges').'</label><div class=\"col-sm-8\"><table>"; |
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if (blanks!=null) { |
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if (typeof updateBlanks.randomValues === "undefined") { |
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updateBlanks.randomValues = []; |
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} |
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for (i=0 ; i<blanks.length ; i++){ |
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if (document.getElementById("lowestValue["+i+"]") && document.getElementById("highestValue["+i+"]")) { |
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lowestValue = document.getElementById("lowestValue["+i+"]").value; |
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highestValue = document.getElementById("highestValue["+i+"]").value; |
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} else { |
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lowestValue = '.$lowestValue.'.toFixed(2); |
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highestValue = '.$highestValue.'.toFixed(2); |
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for (j=0; j<blanks.length; j++) { |
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updateBlanks.randomValues[j] = parseFloat(Math.random() * (highestValue - lowestValue) + lowestValue).toFixed(2); |
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} |
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} |
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fields += "<tr><td><label>"+blanks[i]+"</label></td><td><input class=\"span1\" style=\"margin-left: 0em;\" size=\"5\" value=\""+lowestValue+"\" type=\"text\" id=\"lowestValue["+i+"]\" name=\"lowestValue["+i+"]\" onblur=\"updateRandomValue(this)\"/></td><td><input class=\"span1\" style=\"margin-left: 0em; width:80px;\" size=\"5\" value=\""+highestValue+"\" type=\"text\" id=\"highestValue["+i+"]\" name=\"highestValue["+i+"]\" onblur=\"updateRandomValue(this)\"/></td><td><label class=\"span3\" id=\"randomValue["+i+"]\"/>'.get_lang('ExampleValue').': "+updateBlanks.randomValues[i]+"</label></td></tr>"; |
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} |
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} |
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document.getElementById("blanks_weighting").innerHTML = fields + "</table></div></div>"; |
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if (firstTime) { |
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firstTime = false; |
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} |
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} |
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window.onload = updateBlanks; |
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</script>'; |
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// answer |
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$form->addElement('label', null, '<br /><br />'.get_lang('TypeTextBelow').', '.get_lang('And').' '.get_lang('UseTagForBlank')); |
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$form->addElement( |
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'html_editor', |
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'answer', |
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Display::return_icon('fill_field.png'), |
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[ |
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'id' => 'answer', |
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'onkeyup' => 'javascript: updateBlanks(this);', |
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], |
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[ |
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'ToolbarSet' => 'TestQuestionDescription', |
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'Width' => '100%', |
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'Height' => '350', |
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] |
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); |
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$form->addRule('answer', get_lang('GiveText'), 'required'); |
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$form->addRule('answer', get_lang('DefineBlanks'), 'regex', '/\[.*\]/'); |
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$form->applyFilter('answer', 'attr_on_filter'); |
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$form->addElement('label', null, get_lang('IfYouWantOnlyIntegerValuesWriteBothLimitsWithoutDecimals')); |
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$form->addElement('html', '<div id="blanks_weighting"></div>'); |
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$notationListButton = Display::url( |
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get_lang('NotationList'), |
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api_get_path(WEB_CODE_PATH).'exercise/evalmathnotation.php', |
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[ |
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'class' => 'btn btn-info ajax', |
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'data-title' => get_lang('NotationList'), |
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'_target' => '_blank', |
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] |
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); |
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$form->addElement( |
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'label', |
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null, |
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$notationListButton |
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); |
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$form->addElement('text', 'formula', [get_lang('Formula'), get_lang('FormulaExample')], ['id' => 'formula']); |
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$form->addRule('formula', get_lang('GiveFormula'), 'required'); |
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$form->addElement('text', 'weighting', get_lang('Weighting'), ['id' => 'weighting']); |
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$form->setDefaults(['weighting' => '10']); |
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$form->addElement('text', 'answerVariations', get_lang('AnswerVariations')); |
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$form->addRule( |
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'answerVariations', |
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get_lang('GiveAnswerVariations'), |
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'required' |
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); |
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$form->setDefaults(['answerVariations' => '1']); |
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global $text; |
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// setting the save button here and not in the question class.php |
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$form->addButtonSave($text, 'submitQuestion'); |
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if (!empty($this->iid)) { |
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$form->setDefaults($defaults); |
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} else { |
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if ($this->isContent == 1) { |
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$form->setDefaults($defaults); |
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} |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function processAnswersCreation($form, $exercise) |
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{ |
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if (!self::isAnswered()) { |
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$table = Database::get_course_table(TABLE_QUIZ_ANSWER); |
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Database::delete( |
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$table, |
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[ |
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'question_id = ?' => [ |
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$this->iid, |
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], |
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] |
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); |
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$answer = $form->getSubmitValue('answer'); |
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$formula = $form->getSubmitValue('formula'); |
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$lowestValues = $form->getSubmitValue('lowestValue'); |
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$highestValues = $form->getSubmitValue('highestValue'); |
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$answerVariations = $form->getSubmitValue('answerVariations'); |
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$this->weighting = $form->getSubmitValue('weighting'); |
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// Create as many answers as $answerVariations |
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for ($j = 0; $j < $answerVariations; $j++) { |
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$auxAnswer = $answer; |
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$auxFormula = $formula; |
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$nb = preg_match_all('/\[[^\]]*\]/', $auxAnswer, $blanks); |
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if ($nb > 0) { |
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for ($i = 0; $i < $nb; $i++) { |
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$blankItem = $blanks[0][$i]; |
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// take random float values when one or both edge values have a decimal point |
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$randomValue = |
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(strpos($lowestValues[$i], '.') !== false || |
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strpos($highestValues[$i], '.') !== false) ? |
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mt_rand($lowestValues[$i] * 100, $highestValues[$i] * 100) / 100 : mt_rand($lowestValues[$i], $highestValues[$i]); |
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$auxAnswer = str_replace($blankItem, $randomValue, $auxAnswer); |
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$auxFormula = str_replace($blankItem, $randomValue, $auxFormula); |
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} |
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$math = new EvalMath(); |
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$result = $math->evaluate($auxFormula); |
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$result = number_format($result, 2, '.', ''); |
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// Remove decimal trailing zeros |
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$result = rtrim($result, '0'); |
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// If it is an integer (ends in .00) remove the decimal point |
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if (mb_substr($result, -1) === '.') { |
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$result = str_replace('.', '', $result); |
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} |
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// Attach formula |
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$auxAnswer .= " [".$result."]@@".$formula; |
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} |
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$this->save($exercise); |
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$objAnswer = new Answer($this->iid); |
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$objAnswer->createAnswer($auxAnswer, 1, '', $this->weighting, ''); |
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$objAnswer->position = []; |
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$objAnswer->save(); |
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} |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function return_header(Exercise $exercise, $counter = null, $score = []) |
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{ |
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$header = parent::return_header($exercise, $counter, $score); |
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$header .= '<table class="'.$this->question_table_class.'"><tr>'; |
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$header .= '<th>'.get_lang('Answer').'</th>'; |
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if ($exercise->showExpectedChoice()) { |
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$header .= '<th>'.get_lang('YourChoice').'</th>'; |
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if ($exercise->showExpectedChoiceColumn()) { |
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$header .= '<th>'.get_lang('ExpectedChoice').'</th>'; |
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} |
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$header .= '<th>'.get_lang('Status').'</th>'; |
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} |
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$header .= '</tr>'; |
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return $header; |
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} |
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/** |
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* Returns true if the current question has been attempted to be answered. |
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* |
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* @return bool |
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*/ |
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public function isAnswered() |
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{ |
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$table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT); |
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$result = Database::select( |
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'question_id', |
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$table, |
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[ |
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'where' => [ |
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'question_id = ? AND c_id = ?' => [ |
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$this->iid, |
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$this->course['real_id'], |
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], |
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], |
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] |
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); |
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return empty($result) ? false : true; |
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} |
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} |
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chamilo /
chamilo-lms
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