/**
* This will generate a brand new question from a question base.
* Unlike fromQuestionBase(), this method will NOT consult the database for question first
* @param Model_Quiz_QuestionBase $vQuestionBase
* @return Model_Quiz_GeneratedQuestion
*/
public static function generateNewFromQuestionBase(Model_Quiz_QuestionBase $vQuestionBase, $path = false)
{
/*
$path = "/../xml/questions/";
$path = "/../tests/fixtures/";*/
if (!$path) {
$config = new Zend_Config_Ini(APPLICATION_PATH . "/configs/application.ini", APPLICATION_ENV);
$path = $config->xml->import_path;
}
My_Logger::log(__METHOD__ . " Using path: {$path}");
$vGenerated = null;
$error_threshold = 4;
$error_counter = 0;
while ($error_counter <= $error_threshold && is_null($vGenerated)) {
// Start by ensuring the Question is has instructions outputs etc etc
$vQuestion = new Model_Shell_GenericQuestion($path . '/' . $vQuestionBase->getXml());
$problem_string = $vQuestion->getProblem();
$question_output = $vQuestion->getCorrectOutput();
// We need to make sure that the question has valid output
if (strlen(trim($question_output)) > 0) {
// If the question is multiple choice, we need to ensure that all answers are different
$alternate_answers = $vQuestion->getAnswers();
if (!is_null($alternate_answers) && sizeof($alternate_answers) > 0) {
shuffle($alternate_answers);
// Now, we need to ensure that we have 3 different answers that are ALL different to the actual answer
$answer_set = array(trim($question_output));
// Value is the answer
foreach ($alternate_answers as $aa_key => $alternate_answer) {
if (is_array($alternate_answer)) {
$alternate_answer = $alternate_answer[0];
}
$alternate_answer = trim($alternate_answer);
if (in_array($alternate_answer, $answer_set) || strlen(trim($alternate_answer)) == 0) {
unset($alternate_answers[$aa_key]);
// Answer already exists, or is blank (unusable)
} else {
$answer_set[] = $alternate_answer;
}
}
if (sizeof($alternate_answers) >= 3) {
// All is good. We can add this question, as well as all its alternate answers
$vGenerated = Model_Quiz_GeneratedQuestion::fromScratch($vQuestion->getInstructions(), $vQuestion->getProblem(), $vQuestion->getCorrectOutput(), $vQuestionBase);
$vNum = 1;
foreach ($alternate_answers as $vAltAnswer) {
if ($vNum > 3) {
break;
//Can't have more than 3 alternates
}
if (is_array($vAltAnswer)) {
$vGenerated->addAlternateAnswer($vNum, $vAltAnswer[0], $vAltAnswer[1]);
} else {
$vGenerated->addAlternateAnswer($vNum, $vAltAnswer, "");
}
$vNum++;
}
} else {
$error_counter++;
}
} else {
// Not a multiple choice question
$vGenerated = Model_Quiz_GeneratedQuestion::fromScratch($vQuestion->getInstructions(), $vQuestion->getProblem(), $vQuestion->getCorrectOutput(), $vQuestionBase);
}
} else {
$error_counter++;
// The question didn't return a result
}
}
if (is_null($vGenerated)) {
throw new Exception("Attempted to generate a question " . $error_threshold . " times, but failed. Cannot continue");
}
//If the question is a fill-in question, put the whole solution in the 1st alternate answer column
if ($vQuestion->getFriendlyType() == "fill-in") {
$vGenerated->setAlt_desc_1($vQuestion->getDebugProblem());
}
return $vGenerated;
}
function testRandset()
{
$this->clearAll();
$this->clearTemp();
$filename = 'randset.xml';
$filepath = $this->config->xml->import_path . "/" . $filename;
$xml = simplexml_load_file($filepath);
$concept = (string) $xml->concepts->concept;
//from source
$importer = $this->createXmlImporter($this->path);
$importer->parseFile($filename);
//Create the quiz
$qz = $this->createQuiz("Some Quiz", 'comp115-students');
//Add tested concept to quiz
$this->addTestedConcept($qz, $concept, 3);
My_Logger::clearLog();
$this->clearMysqlLog();
My_Logger::log('**** BEGIN ******');
// Get the Question XML
$mQuestion = new Model_Shell_GenericQuestion($filepath);
$this->assertEquals('output', $mQuestion->getFriendlyType());
$this->assertTrue(in_array($concept, $mQuestion->getConcepts()));
$this->assertEquals('1', $mQuestion->getDifficulty());
//Here comes the compilation. After this single call, all the artifacts are produced
$this->assertEquals(trim((string) $xml->instructions), $mQuestion->getInstructions());
//return;
//for fun let's ourselves load the xml
My_Logger::log(__METHOD__ . ": simpleXml " . print_r($xml, true));
My_Logger::log(__METHOD__ . ": substitution " . print_r($xml->substitutions->substitution[0], true));
My_Logger::log(__METHOD__ . ": substitution " . (string) $xml->substitutions->substitution[0]->attributes()->{'val'});
My_Logger::log(__METHOD__ . ": substitution " . (string) $xml->substitutions->substitution[0]);
My_Logger::log(__METHOD__ . "problem:" . (string) $xml->problem);
My_Logger::log(__METHOD__ . "actual:" . $mQuestion->getProblem());
$this->assertEquals('foo', $mQuestion->getCorrectOutput());
}