public function errorAction()
{
$errors = $this->_getParam('error_handler');
switch ($errors->type) {
case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ROUTE:
case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_CONTROLLER:
case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ACTION:
// 404 error -- controller or action not found
$this->getResponse()->setHttpResponseCode(404);
$this->view->message = 'Page not found';
break;
default:
// application error
$this->getResponse()->setHttpResponseCode(500);
$this->view->message = 'Application error';
break;
}
// Log exception, if logger available
if ($log = $this->getLog()) {
$log->crit($this->view->message, $errors->exception);
}
// Log to file if we can
Model_Shell_Debug::getInstance()->log("Exception Occured: " . $errors->exception->getMessage() . "\n" . $errors->exception->getTraceAsString());
Model_Shell_Debug::getInstance()->saveToDisk();
// conditionally display exceptions
if ($this->getInvokeArg('displayExceptions') == true) {
$this->view->exception = $errors->exception;
}
$this->view->request = $errors->request;
}
/**
* Get the instance of the debug class
*
* @return Model_Shell_Debug
*/
public static function getInstance()
{
if (is_null(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
/**
* 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)");
}
/**
* Selects the next question base appropriate for the quiz attempt passed
* @param Model_Quiz_QuizAttempt $vQuizAttempt
* @param boolean $debug Being Phased out TODO
* @throws Exception
* @return Model_Quiz_QuestionBase|NULL NULL Should only be returned in exceptional circumstances
*/
public static function select_next_question($vQuizAttempt, $debug = false)
{
//Get all the concepts this quiz tests
$vQuiz = $vQuizAttempt->getQuiz();
$vTestedConcepts = $vQuiz->getTestedConcepts();
if (sizeof($vTestedConcepts) < 1) {
throw new Exception("This quiz is not ready yet - reason: No testedConcepts specified.");
}
//Foreach concept tested, see how many questions we've attempted
foreach ($vTestedConcepts as $vTestedConcept) {
Model_Shell_Debug::getInstance()->log("Looking at TestedConcept: " . $vTestedConcept->getConcept()->getConcept_name());
$vQuestionAttempts = Model_Quiz_QuestionAttempt::getAllFromQuizAttemptAndConcept($vQuizAttempt, $vTestedConcept->getConcept());
Model_Shell_Debug::getInstance()->log("Done " . sizeof($vQuestionAttempts) . "/" . $vTestedConcept->getNumber_tested());
//If we haven't attempted enough in this concept, we need to choose a question difficulty
if (sizeof($vQuestionAttempts) < $vTestedConcept->getNumber_tested()) {
//What difficulties are there being tested within this concept?
$vLowest = $vTestedConcept->getLower_difficulty();
$vHighest = $vTestedConcept->getHigher_difficulty();
//Find out how many questions I should allocate for each difficulty
$mQuestionsPerDifficultyLevel = floor(0.8 / ($vHighest + 1 - $vLowest) * $vTestedConcept->getNumber_tested());
$mBuffer = $vTestedConcept->getNumber_tested() - ($vHighest + 1 - $vLowest) * $mQuestionsPerDifficultyLevel;
//If there's only one difficulty, that settles that
if ($vLowest == $vHighest) {
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vLowest);
}
//Were there any previous attempts at this concept? If not, we need to start a Q at the lowest specified difficulty
$vQuestionAttempts = $vQuizAttempt->getQuestionAttempts($vTestedConcept->getConcept());
//echo "Size of vQuestionAttempts:".sizeof($vQuestionAttempts)."<br/>";
if (sizeof($vQuestionAttempts) == 0) {
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vLowest);
}
//Find the highest attempted difficulty done so far
$vHighestSoFar = $vQuizAttempt->getHighestDifficultyTestedSoFar();
//echo "The highest difficulty so far: $vHighestSoFar<br/>";
if ($vHighestSoFar >= $vHighest) {
//Already at the highest difficulty, the next question will be at this difficulty too
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vHighest);
}
//Look at the last attempts in this difficulty. Were they below-par (use a percentage?)?
$vTotal = 0;
$vTotalRight = 0;
Model_Shell_Debug::getInstance()->log("Checking your previous attempts...Size of vQuestionAttempts:" . sizeof($vQuestionAttempts));
foreach ($vQuestionAttempts as $vQA) {
$vQB = $vQA->getQuestion_base();
//echo "Looking at " . $vQB->getDifficulty() . " vs $vHighestSoFar<br/>";
if ($vQB->getDifficulty() == $vHighestSoFar) {
$vTotal++;
if ($vQB->getEstimated_time() > $vQA->getTime_finished() - $vQA->getTime_started()) {
//You did this question in a reasonable time... did you get it right first time?
if ($vQA->getInitial_result() == "1") {
$vTotalRight++;
}
}
}
}
//Note, a divide by 0 happened here before...
if ($vTotal == 0 || $vTotalRight / $vTotal > 0.8) {
//OK. If they WERE good attempts, I should move on if I've hit my quota for this difficulty
if ($vTotal >= $mQuestionsPerDifficultyLevel) {
//Reached our minumum quota for this difficulty level. NEXT!
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vHighestSoFar + 1);
} else {
//We've done well so far, but we need to do more in this difficulty
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vHighestSoFar);
}
} else {
//Your previous attempts weren't all that good.
//Figure out how much buffer we have left. Can we afford to give you a question at $vHighestSoFar? Or do we have to move onto something harder?
$mBuffer = $vTestedConcept->getNumber_tested() - ($vHighest - $vHighestSoFar) * $mQuestionsPerDifficultyLevel - sizeof($vQuestionAttempts);
if ($mBuffer > 1) {
//We can afford to give you another easier question
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vHighestSoFar);
} else {
//Sorry.. buffer is dry. You weren't going too well, but you gotta do the harder stuff
return Model_Shell_QuestionChooser::select_next_question_2($vQuizAttempt, $vTestedConcept->getConcept(), $vHighestSoFar + 1);
}
}
}
//End If
}
//End Foreach testedConcept
//We shouldn't really ever get here, but in case we do -> null
return null;
}
/**
* This action is the quiz shell.
* It ensures permissions, creates new attempts etc etc.
*
* @author Ben Evans
*/
public function attemptAction()
{
Model_Shell_Debug::getInstance()->log("User Entered the Attempt Action");
$identity = Zend_Auth::getInstance()->getIdentity();
$username = $identity->username;
$auth_model = Model_Auth_General::getAuthModel();
/* Before we do anything, test to make sure we've passed a VALID QUIZ which WE ARE ENTITLED to sit. */
$quiz_id = $this->_getParam("quiz");
if (is_null($quiz_id)) {
throw new Exception("No quiz was passed. Cannot continue.");
}
$vQuiz = Model_Quiz_Quiz::fromID($quiz_id);
if ($vQuiz == null) {
throw new Exception("Quiz ID passed was invalid. Cannot continue.");
}
$mFinished = false;
$mMarking = false;
//Permissions
if ($auth_model->userInGroup($username, $vQuiz->getPermissions_group()) && $vQuiz->getOpen_date() <= strtotime("now")) {
//Have we run out of attempts?
$vAttempts = Model_Quiz_QuizAttempt::getAllFromUser($username, $vQuiz);
if (sizeof($vAttempts) >= $vQuiz->getMax_attempts()) {
//It is possible that we're on our last attempt, and that it's "in progress"...check
$bInProgress = false;
foreach ($vAttempts as $vAttempt) {
if ($vAttempt->getDate_finished() == null) {
$bInProgress = true;
}
}
if (!$bInProgress) {
throw new Exception("You've exceeded your maximum attempts for this quiz. Cannot continue");
}
}
} else {
if (!$this->view->is_admin) {
throw new Exception("Insufficient Permissions to take this quiz / Quiz not open yet");
}
$vAttempts = Model_Quiz_QuizAttempt::getAllFromUser($username, $vQuiz);
}
/* Ok. We're allowed to TAKE the quiz. Are we resuming, or starting a new one? */
$mQuizAttempt = null;
if (is_array($vAttempts)) {
foreach ($vAttempts as $vAttempt) {
if ($vAttempt->getDate_finished() == null) {
$mQuizAttempt = $vAttempt;
break;
}
}
//End Foreach
}
//End If
if ($mQuizAttempt == null) {
$mQuizAttempt = Model_Quiz_QuizAttempt::fromScratch(strtotime("now"), $vQuiz, $username);
}
/* Calculate the total questions needed for this quiz */
$vTCs = $vQuiz->getTestedConcepts();
$vTotalQuestions = 0;
foreach ($vTCs as $vTC) {
$vTotalQuestions = $vTotalQuestions + $vTC->getNumber_tested();
}
/* We have our quizAttempt ready to go. Now we look to see if we're resuming a question or not */
$mQuestionAttempt = $mQuizAttempt->getLastIncompleteQuestion();
if (is_object($mQuestionAttempt) && !$mQuestionAttempt->isValid()) {
$mQuestionAttempt->destroy();
// Remove the Question attempt (Database was reinitialised or something)
$mQuestionAttempt = null;
}
if ($mQuestionAttempt != null) {
/* Are we getting an ANSWER for this question? */
if (array_key_exists("marking", $_POST) && $_POST['marking'] == "1") {
/* Mark it */
$mMarking = true;
}
/* If we reach here, the page has probably been refreshed. We just re-display the last question */
} else {
/* Have we finished this quiz? */
if ($mQuizAttempt->getQuestionAttemptCount() >= $vTotalQuestions) {
//Close this attempt and display a result later on down the page
$mQuizAttempt->setDate_finished(strtotime("now"));
//Calculate and store the final score
$mQuizAttempt->setTotal_score($mQuizAttempt->getTotal_score());
$mFinished = true;
} else {
/* QuizAttempt isn't finished... Fetch a questionBase */
$vQuestionBase = Model_Shell_QuestionChooser::select_next_question($mQuizAttempt, true);
/* Make a GeneratedQuestion */
$vCounter = 0;
//Make sure we don't get any fluke no-text answers
while ($vCounter < 3) {
Model_Shell_Debug::getInstance()->log("vQuestionBase: " . isset($vQuestionBase));
Model_Shell_Debug::getInstance()->log("Generating... from " . $vQuestionBase->getXml());
$vGen = Model_Quiz_GeneratedQuestion::fromQuestionBase($vQuestionBase);
if ($vGen->getCorrect_answer() != "" && $vGen->getCorrect_answer() != "\r\n") {
break;
} else {
$vGen->remove();
}
$vCounter++;
}
if ($vGen->getCorrect_answer() == "" || $vGen->getCorrect_answer() == "\r\n") {
throw new Exception("Error. While generating a question for you, blank answers appeared > 3 times. This should never happen. Either try to refresh this page, or consult your lecturer...");
}
/* Make a QuestionAttempt */
$mQuestionAttempt = Model_Quiz_QuestionAttempt::fromScratch($vQuestionBase, strtotime("now"), strtotime("now"), $mQuizAttempt, $vGen);
}
//End-if_finished_quizAttempt
}
// Pass all relevant information to the view
$this->view->quiz = $vQuiz;
$this->view->question_attempt = $mQuestionAttempt;
$this->view->finished = $mFinished;
$this->view->marking = $mMarking;
$this->view->mQuizAttempt = $mQuizAttempt;
$this->view->vTotalQuestions = $vTotalQuestions;
}
/**
* Compiles the question and returns the correct output
* @return string
*/
public function getCorrectOutput()
{
if (isset($this->mActualAnswer)) {
return $this->mActualAnswer;
}
Model_Shell_Debug::getInstance()->log(" Attempting to generate correct answer for Question.", __METHOD__);
$this->mActualAnswer = Model_Shell_Compiler::compileAndReturn(time() . rand(1, 99999), $this->mProblem);
$this->mSubstitutions['ans'] = $this->mActualAnswer;
return $this->mActualAnswer;
}
protected function makeQuestionAttempt($quizAttempt, $now)
{
$questionBase = Model_Shell_QuestionChooser::select_next_question($quizAttempt, true);
$path = $this->getFrontController()->getParam('xml_path');
// This way we can set it externally from our tests. If not set, called code will just use the configuration value
/* Make a GeneratedQuestion */
$cnt = 0;
// Make sure we don't get any fluke no-text answers
while ($cnt < 3) {
Model_Shell_Debug::getInstance()->log("vQuestionBase: " . isset($questionBase));
Model_Shell_Debug::getInstance()->log("Generating... from " . $questionBase->getXml());
$vGen = Model_Quiz_GeneratedQuestion::fromQuestionBase($questionBase, $path);
if ($vGen->getCorrect_answer() != "" && $vGen->getCorrect_answer() != "\r\n") {
break;
} else {
$vGen->remove();
}
$cnt++;
}
if ($vGen->getCorrect_answer() == "" || $vGen->getCorrect_answer() == "\r\n") {
throw new Exception("Error. While generating a question for you, blank answers appeared > 3 times. This should never happen. Either try to refresh this page, or consult your lecturer...");
}
/* Make a QuestionAttempt */
return Model_Quiz_QuestionAttempt::fromScratch($questionBase, $now, $now, $quizAttempt, $vGen);
}
/**
* This will remove ALL pre-generated questions that haven't been used in a quiz
*/
public static function removePregeneratedQuestions()
{
$db = Zend_Registry::get("db");
/* @var $db Zend_DB_Adapter_Abstract */
Model_Shell_Debug::getInstance()->log("Removing all Pre-generated questions");
$rows = $db->query("SELECT generated_id FROM generated_questions \n\t\t\tWHERE generated_id NOT IN(SELECT generated_questionsgenerated_id AS generated_id FROM question_attempt)")->fetchAll();
foreach ($rows as $row) {
$db->delete("generated_questions", "generated_id = " . $db->quote($row['generated_id']));
}
}
/**
* Java-Specific Compilation
*
* @param string $mTempFolder
* @param string $vFilePrefix
* @param string $mSource
* @return string
* @author Ben Evans
*/
private static function java_compile_and_return($mTempFolder, $vFilePrefix, $mSource)
{
Model_Shell_Debug::getInstance()->log("Entering Java Compilation");
Model_Shell_Debug::getInstance()->log("Temporary Folder Given: {$mTempFolder} . File Prefix: {$vFilePrefix}");
Model_Shell_Debug::getInstance()->log("Source passed was:\n{$mSource}");
if (in_array(strtolower(PHP_OS), explode(",", self::NIX_OSES))) {
// Clean up any old existing files
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"))) {
Model_Shell_Debug::getInstance()->log("Existing file exists. Removing");
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"));
}
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix))) {
Model_Shell_Debug::getInstance()->log("Existing folder exists. Removing");
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix));
}
$mTempFolder = self::os_slash($mTempFolder);
// Output the program that's been generated into a File.
$fh = fopen(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"), 'w');
fwrite($fh, $mSource);
fclose($fh);
if (!is_writable($mTempFolder)) {
throw new Exception("Cannot write to {$mTempFolder} Please ensure permissions are correctly set");
}
// Java sometimes generates more than one class... so we put the compiled things in a directory
mkdir($mTempFolder . "/" . $vFilePrefix);
// Run the program that we outputted to a file into a fully functioning Executable
$toExec = "javac \"" . $mTempFolder . "/" . $vFilePrefix . ".java\" -d \"" . $mTempFolder . "/" . $vFilePrefix . "\"";
Model_Shell_Debug::getInstance()->log("Attempted to execute: {$toExec}");
$execResult = exec($toExec);
Model_Shell_Debug::getInstance()->log("Execution result was: " . $execResult);
// OK Now we need to see what classes have been generated in this directory, and then call that when executing
$directory_contents = scandir($mTempFolder . "/" . $vFilePrefix);
if (sizeof($directory_contents) < 3) {
throw new Exception("When Trying to generate a new randomised question, Compilation Failed. Reason: " . $execResult);
}
// At this point, I'm assuming we have only 1 main class
$program_to_run = null;
foreach ($directory_contents as $dc) {
if (strlen($dc) > 5) {
$program_to_run = str_replace(".class", "", $dc);
}
}
if (!is_null($program_to_run)) {
// Most linuxes and Unixes come with the GNU timeout program. However, OSX doesn't
if (in_array(strtolower(PHP_OS), array('darwin'))) {
$toExec = realpath(APPLICATION_PATH . "/../resources/osx_timeout.sh") . " 5 java -cp \"" . $mTempFolder . "/" . $vFilePrefix . "\" " . $program_to_run . " > \"" . $mTempFolder . "/" . $vFilePrefix . ".txt\"";
} else {
$toExec = "timeout 5 java -cp \"" . $mTempFolder . "/" . $vFilePrefix . "\" " . $program_to_run . " > \"" . $mTempFolder . "/" . $vFilePrefix . ".txt\"";
}
$execution_result = exec($toExec);
Model_Shell_Debug::getInstance()->log("Java program compiled. Now executing: " . $toExec);
// Model_Shell_Debug::getInstance()->log("The shell Execution result (not expecting anything) was: " . $execution_result);
$vContents = file_get_contents(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".txt"));
Model_Shell_Debug::getInstance()->log("File Execution result was: " . trim($vContents));
//Delete all the stuff we made
unlink("{$mTempFolder}/" . $vFilePrefix . ".java");
unlink("{$mTempFolder}/" . $vFilePrefix . ".txt");
Model_Utils_Filesystem::delete_directory($mTempFolder . "/" . $vFilePrefix);
return $vContents;
} else {
return "Compilation failed! Reason:" . $execResult;
}
} else {
//We're running Windows (probably)
// We have to make sure that the user has defined the JAVA Path (unlike Linux where it's just in the PATH)
if (!defined("JAVAC_PATH")) {
throw new Exception("The Windows Javac.exe Path is not defined. Please define it in general.php");
} else {
if (!file_exists(JAVAC_PATH)) {
throw new Exception("The JavaC Path defined (Windows) is not accessible by this application");
}
}
// Remove all old stuff
if (file_exists("{$mTempFolder}/" . $vFilePrefix . ".java")) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"));
}
if (file_exists("{$mTempFolder}/" . $vFilePrefix . ".exe")) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".exe"));
}
$fh = fopen(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"), 'w');
fwrite($fh, $mSource);
fclose($fh);
// Java sometimes generates more than one class... so we put the compiled things in a directory
mkdir($mTempFolder . "\\" . $vFilePrefix);
$toExec = "\"" . JAVAC_PATH . "\" \"" . $mTempFolder . "\\" . $vFilePrefix . ".java\" -d \"" . $mTempFolder . "\\" . $vFilePrefix . "\"";
$execResult = exec($toExec);
// OK Now we need to see what classes have been generated in this directory, and then call that when executing
$directory_contents = scandir($mTempFolder . "\\" . $vFilePrefix);
if (sizeof($directory_contents) < 3) {
throw new Exception("When Trying to generate a new randomised question, Compilation Failed. Reason: " . $execResult);
}
// At this point, I'm assuming we have only 1 main class
$program_to_run = null;
foreach ($directory_contents as $dc) {
if (strlen($dc) > 5) {
$program_to_run = str_replace(".class", "", $dc);
}
}
if (!is_null($program_to_run)) {
$toExec = "java -cp \"" . $mTempFolder . "\\" . $vFilePrefix . "\" " . $program_to_run . " > \"" . $mTempFolder . "\\" . $vFilePrefix . ".txt\"";
$fh = fopen("{$mTempFolder}/" . $vFilePrefix . ".bat", 'w');
fwrite($fh, $toExec);
fclose($fh);
$toExec = '"' . $mTempFolder . "\\limitexec.exe\" 5 " . $vFilePrefix;
//echo "EXECUTING: " . $toExec;
exec($toExec);
$vContents = file_get_contents(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".txt"));
//Delete all the stuff we made
unlink("{$mTempFolder}/" . $vFilePrefix . ".bat");
unlink("{$mTempFolder}/" . $vFilePrefix . ".java");
unlink("{$mTempFolder}/" . $vFilePrefix . ".txt");
exec("rmdir \"" . $mTempFolder . "\\" . $vFilePrefix . "\" /S /Q");
return $vContents;
} else {
return "Compilation failed! Reason:" . $execResult;
}
}
//End Windows-specific code
}
protected static function java_linux($mTempFolder, $vFilePrefix, $mSource)
{
// Clean up any old existing files
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"))) {
Model_Shell_Debug::getInstance()->log("Existing file exists. Removing");
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"));
}
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix))) {
Model_Shell_Debug::getInstance()->log("Existing folder exists. Removing");
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix));
}
$mTempFolder = self::os_slash($mTempFolder);
// Output the program that's been generated into a File.
$fh = fopen(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".java"), 'w');
fwrite($fh, $mSource);
fclose($fh);
if (!is_writable($mTempFolder)) {
throw new Exception("Cannot write to {$mTempFolder} Please ensure permissions are correctly set");
}
// Java sometimes generates more than one class... so we put the compiled things in a directory
mkdir($mTempFolder . "/" . $vFilePrefix);
$error_file = $mTempFolder . '/' . $vFilePrefix . '.error.txt';
// Capture error messages here - Ivan
// Run the program that we outputted to a file into a fully functioning Executable
$toExec = "javac \"" . $mTempFolder . "/" . $vFilePrefix . ".java\" -d \"" . $mTempFolder . "/" . $vFilePrefix . "\"" . ' 2> "' . $error_file . '"';
Model_Shell_Debug::getInstance()->log("Attempted to execute: {$toExec}");
$execResult = exec($toExec);
Model_Shell_Debug::getInstance()->log("Execution result was: " . $execResult);
self::proccessErrorFile($error_file);
// Ivan
// OK Now we need to see what classes have been generated in this directory, and then call that when executing
$directory_contents = scandir($mTempFolder . "/" . $vFilePrefix);
if (sizeof($directory_contents) < 3) {
throw new Exception("When Trying to generate a new randomised question, Compilation Failed. Reason: " . $execResult);
}
// At this point, I'm assuming we have only 1 main class
$program_to_run = null;
foreach ($directory_contents as $dc) {
if (strlen($dc) > 5) {
$program_to_run = str_replace(".class", "", $dc);
}
}
if (!is_null($program_to_run)) {
// Most linuxes and Unixes come with the GNU timeout program. However, OSX doesn't
if (in_array(strtolower(PHP_OS), array('darwin'))) {
$toExec = realpath(APPLICATION_PATH . "/../resources/osx_timeout.sh") . " 5 java -cp \"" . $mTempFolder . "/" . $vFilePrefix . "\" " . $program_to_run . " > \"" . $mTempFolder . "/" . $vFilePrefix . ".txt\"";
} else {
// For now we will only support our target platform (Ubuntu) - Ivan
$toExec = "timeout 5 java -cp \"" . $mTempFolder . "/" . $vFilePrefix . "\" " . $program_to_run . " > \"" . $mTempFolder . "/" . $vFilePrefix . ".txt\"";
}
$execution_result = exec($toExec);
Model_Shell_Debug::getInstance()->log("Java program compiled. Now executing: " . $toExec);
// Model_Shell_Debug::getInstance()->log("The shell Execution result (not expecting anything) was: " . $execution_result);
$vContents = file_get_contents(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".txt"));
Model_Shell_Debug::getInstance()->log("File Execution result was: " . trim($vContents));
// Delete all the stuff we made
unlink("{$mTempFolder}/" . $vFilePrefix . ".java");
unlink("{$mTempFolder}/" . $vFilePrefix . ".txt");
Model_Utils_Filesystem::delete_directory($mTempFolder . "/" . $vFilePrefix);
return $vContents;
} else {
return "Compilation failed! Reason:" . $execResult;
}
}
/**
* An Administrative function that tests Question Generation
*
* @return void
* @author Ben Evans
*/
public function testquestiongenerationAction()
{
if (!$this->view->is_admin) {
throw new Exception("Access Denied");
}
$this->_helper->layout->disableLayout();
//$xml_path = APPLICATION_PATH . '/../xml/questions';
$config = new Zend_Config_Ini(APPLICATION_PATH . "/configs/application.ini", APPLICATION_ENV);
$xml_path = $config->xml->import_path;
My_Logger::log($xml_path);
$this->view->available_files = $this->getAvailableFiles($xml_path);
// See what Question we're looking at...
$this->view->selected_xml = $selected_xml = $this->_getParam("q");
if (isset($selected_xml) && !is_null($selected_xml)) {
// Get the Question XML
try {
$mQuestion = new Model_Shell_GenericQuestion($xml_path . "/" . $selected_xml . ".xml");
$this->view->question = $mQuestion;
} catch (Exception $e) {
//throw $e;
}
// Just make a new random question, so we get access to functions like Randset
$temp = new Model_Quiz_GeneratedQuestion();
}
//added by Ivan. Force for now, comment out in release
Model_Shell_Debug::getInstance()->saveToDisk();
}