function processFiles()
{
$path = $this->path;
$handle = opendir($path);
if (!$handle) {
return;
}
// Process the XML Files
while (false !== ($file = readdir($handle))) {
if (strtolower(substr($file, -3)) == "xml") {
$this->parseFile($file);
}
}
closedir($handle);
Model_Quiz_GeneratedQuestion::removePregeneratedQuestions();
// Remove all Pre-Generated questions, so as to not cause any conficts
}
/**
* Generates a bank of questions for a question identifier provided
* Expects parameters [question_id], [questions_to_generate_num], [max_errors_num]
*/
public function generatequestionbankAction()
{
// Check to see that all the parameters get passed
$parameters = $this->_getAllParams();
$check_errors = array();
foreach (array("question_id" => "Question Identifier", "questions_to_generate_num" => "Number of Questions to Generate", "max_errors_num" => "Maximum number of Errors") as $check_key => $check_text) {
if (!array_key_exists($check_key, $parameters) || !is_numeric($parameters[$check_key]) || $parameters[$check_key] < 0) {
$check_errors[] = $check_text . " [" . $check_key . "] was not passed, or not a positive number.";
}
}
if (sizeof($check_errors) > 0) {
cronlog("The following validation errors occured:");
foreach ($check_errors as $ce) {
cronlog($ce);
}
exit;
}
//cronlog('ok so far');
$question_base_id = intval($parameters['question_id']);
$number_of_questions = intval($parameters['questions_to_generate_num']);
$maximum_errors = intval($parameters['max_errors_num']);
cronlog("Generating {$number_of_questions} questions from Question Base Identifier {$question_base_id} ; Maximum Error threshold is {$maximum_errors}");
$vQuestionBase = Model_Quiz_QuestionBase::fromID($question_base_id);
if (is_null($vQuestionBase)) {
throw new Exception("The question base identifier passed was invalid");
}
$question_counter = 0;
$error_counter = 0;
My_Logger::log(__METHOD__ . " number_of_questions: {$number_of_questions}");
My_Logger::log(__METHOD__ . " maximum_errors: {$maximum_errors}");
while ($question_counter <= $number_of_questions && $error_counter <= $maximum_errors) {
My_Logger::log(__METHOD__ . " question_counter: {$question_counter}");
My_Logger::log(__METHOD__ . " error_counter: {$error_counter}");
try {
$vGeneratedQuestion = Model_Quiz_GeneratedQuestion::generateNewFromQuestionBase($vQuestionBase);
} catch (Exception $e) {
cronlog("Could not generate question. " . $e->getMessage());
echo Model_Shell_Debug::getInstance()->getLog();
$error_counter++;
}
}
cronlog("Finished. Generated " . $question_counter . " questions; " . $error_counter . " errornous questions generated (but discarded)");
}
public function imagegenAction()
{
if ($_GET['gid'] == null) {
die;
} else {
$gc = Model_Quiz_GeneratedQuestion::fromID($_GET['gid']);
if ($gc == null) {
die;
}
}
//TODO: Some more auth here...
$image_generator = new Model_Image_Generator();
$image_generator->makeImage($gc->getQuestion_data());
die;
}
/**
* Creates a new Question Attempt from the parameters passed
* @param Model_Quiz_QuestionBase $vQuestionBase
* @param int $attempted_on UNIX Timestamp Int
* @param int $time_started UNIX Timestamp Int
* @param Model_Quiz_QuizAttempt $vQuizAttempt
* @param Model_Quiz_GeneratedQuestion $vGeneratedQuestion
* @return Model_Quiz_QuestionAttempt|NULL
*/
public static function fromScratch($vQuestionBase, $attempted_on, $time_started, $vQuizAttempt, $vGeneratedQuestion)
{
$db = Zend_Registry::get("db");
$sql = "INSERT INTO question_attempt(attempt_id,question_basequestion_id,attempted_on,time_started,quiz_attemptquiz_attempt_id,generated_questionsgenerated_id) VALUES(NULL, " . $db->quote($vQuestionBase->getID()) . ",'" . date("Y-m-d H:i:s", $attempted_on) . "','" . date("Y-m-d H:i:s", $time_started) . "'," . $db->quote($vQuizAttempt->getID()) . "," . $db->quote($vGeneratedQuestion->getID()) . ")";
$db->query($sql);
//Now find the appropriate entry in the database
// A safe (default) assumption for this is a query that looks for everything you just put in.
$sql = "SELECT attempt_id FROM question_attempt WHERE question_basequestion_id=" . $db->quote($vQuestionBase->getID()) . " AND attempted_on='" . date("Y-m-d H:i:s", $attempted_on) . "' AND time_started='" . date("Y-m-d H:i:s", $time_started) . "' AND quiz_attemptquiz_attempt_id=" . $db->quote($vQuizAttempt->getID()) . " AND generated_questionsgenerated_id=" . $db->quote($vGeneratedQuestion->getID());
$result = $db->query($sql);
$row = $result->fetch();
if ($row['attempt_id'] != null) {
return Model_Quiz_QuestionAttempt::fromID($row['attempt_id']);
} else {
return null;
//Something didn't happen
}
}
/**
* 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;
}
/**
* This function rebuilds XML files
* In doing so, all pre-generated questions will be removed.
*/
public function rebuildxmlAction()
{
$process = $this->_getParam("process");
if (is_null($process) || $process !== "1") {
// Get the amount of files in the Questions Dir
$counter = 0;
if ($handle = opendir(APPLICATION_PATH . '/../xml/questions')) {
while (false !== ($file = readdir($handle))) {
if (strtolower(substr($file, -3)) == "xml") {
$counter = $counter + 1;
}
}
closedir($handle);
}
$this->view->count = $counter;
} else {
// Process the XML Files
if ($handle = opendir(APPLICATION_PATH . '/../xml/questions')) {
while (false !== ($file = readdir($handle))) {
if (strtolower(substr($file, -3)) == "xml") {
echo "Parsing file: {$file} <br/>\nConcepts: ";
//Begin Processing
$vQuestion = new Model_Shell_GenericQuestion(APPLICATION_PATH . '/../xml/questions/' . $file);
//Add to questionBase (if not already there)
$vQuestionBase = Model_Quiz_QuestionBase::fromXml($file);
if ($vQuestionBase == null) {
$vQuestionBase = Model_Quiz_QuestionBase::fromScratch($file, $vQuestion->getDifficulty(), $vQuestion->getEstimatedTime(), $vQuestion->getFriendlyType(), strtotime("today"));
}
//Now look at the concepts
$vConcepts = $vQuestion->getConcepts();
foreach ($vConcepts as $vConcept) {
//Make sure this concept exists in the database
$vConceptObj = Model_Quiz_Concept::fromID($vConcept);
if ($vConceptObj == null) {
//Doesn't exist... we should make a record
$vConceptObj = Model_Quiz_Concept::fromScratch($vConcept);
}
echo $vConcept . "; ";
//Now we need to make sure that this question has this concept associated with it
$vQuestionBase->addConcept($vConceptObj);
}
//Update the questionBase's Difficulty & EstimatedTime (these are the things most likely to change)
$vQuestionBase->setDifficulty($vQuestion->getDifficulty());
$vQuestionBase->setEstimated_time($vQuestion->getEstimatedTime());
echo "<br/>Difficulty: " . $vQuestion->getDifficulty();
echo "<br/>Estimated time to complete: " . $vQuestion->getEstimatedTime();
echo "<br/><br/>\n";
}
}
closedir($handle);
Model_Quiz_GeneratedQuestion::removePregeneratedQuestions();
// Remove all Pre-Generated questions, so as to not cause any conficts
}
}
}
