/**
* Fetch the answer data and clean it up based on the type of question
* @param Array $potentialAnswers The potential answers that need checking.
* @return Array A list of the results.
*/
function check_quizzes_canWeContinue_extractAnswerData($potentialAnswers)
{
$resultsList = array('answer_list' => array(), 'wrong_answer_list' => array(), 'error_answer_list' => array());
// #### 1 - Extract a list of actual answers from the potential answers. There will
// be some noise in that data. Check the raw data to see what questions we have.
foreach ($potentialAnswers as $key => $value) {
// Only considering answers to questions. Format of answer field is:
// question_16_truefalse_48 (first ID is quiz, 2nd ID is question, middle string
// is the question type.
if (preg_match('/^question_(\\d+)_([a-z]+)_(\\d+)$/', $key, $matches)) {
$quizID = $matches[1];
$questionID = $matches[3];
$questionType = $matches[2];
// Again, check that answer matches quiz we're expecting.
// Probably a little paranoid, but it's worth checking
// to ensure there's nothing naughty going on.
if ($quizID != $this->unitQuizDetails->quiz_id) {
continue;
}
// Clean up the submitted data based on the type of quiz using the static checks in each
// of the questions (to save loading whole class). If the data is valid, add the valid
// answer to the list of fully validate danswers.
switch ($questionType) {
case 'multi':
$resultsList['answer_list'][$questionID] = WPCW_quiz_MultipleChoice::sanitizeAnswerData($value);
break;
case 'truefalse':
$resultsList['answer_list'][$questionID] = WPCW_quiz_TrueFalse::sanitizeAnswerData($value);
break;
case 'open':
$resultsList['answer_list'][$questionID] = WPCW_quiz_OpenEntry::sanitizeAnswerData($value);
break;
// Ignore uploads as a $_POST field, simply because the files should be stored in $_FILES
// not in $_POST. So if we have a file in $_FILES, that's clearly an issue.
// Ignore uploads as a $_POST field, simply because the files should be stored in $_FILES
// not in $_POST. So if we have a file in $_FILES, that's clearly an issue.
case 'upload':
break;
}
}
// end of question check
}
// end of potential answers loop
// ### 2 - Check for file uploads if the quiz requires them. Only check for uploads
// if the quiz details say there should be some uploads.
if ($this->unitQuizDetails->want_uploads) {
$uploadResultList = WPCW_quiz_FileUpload::validateFiles($_FILES, $this->unitQuizDetails);
// Merge the valid results.
// Basically if a file has been uploaded correctly, that answer is marked as being set.
if (count($uploadResultList['upload_valid']) > 0) {
$resultsList['answer_list'] = $resultsList['answer_list'] + $uploadResultList['upload_valid'];
}
// Merge the error results
if (count($uploadResultList['upload_errors']) > 0) {
$resultsList['error_answer_list'] = $resultsList['error_answer_list'] + $uploadResultList['upload_errors'];
}
}
return $resultsList;
}
/**
* Having entered some details into the quiz, may the user progress to the next unit? If
* there are any problems with the quiz, then they are dealt with via AJAX.
*
* @param Object $quizDetails The potential quiz details.
* @param Array $potentialAnswers The potential answers that need checking.
* @param Integer $userID The ID of the user that we're saving progress for.
*
* @return Boolean True if the user may progress, false otherwise.
*/
function WPCW_quizzes_handleQuizRendering_canUserContinueAfterQuiz($quizDetails, $potentialAnswers, $userID)
{
$resultsList = array('answer_list' => array(), 'wrong_answer_list' => array(), 'error_answer_list' => array());
$resultDetails = array('correct' => array(), 'wrong' => array());
// #### 1A Extract a list of actual answers from the potential answers. There will
// be some noise in that data.
foreach ($potentialAnswers as $key => $value) {
// Only considering answers to questions. Format of answer field is:
// question_16_truefalse_48 (first ID is quiz, 2nd ID is question, middle string
// is the question type.
if (preg_match('/^question_(\\d+)_([a-z]+)_(\\d+)$/', $key, $matches)) {
$quizID = $matches[1];
$questionID = $matches[3];
$questionType = $matches[2];
// Again, check that answer matches quiz we're expecting.
// Probably a little paranoid, but it's worth checking
// to ensure there's nothing naughty going on.
if ($quizID != $quizDetails->quiz_id) {
continue;
}
// Clean up the submitted data based on the type of quiz using the static checks in each
// of the questions (to save loading whole class). If the data is valid, add the valid
// answer to the list of fully validate danswers.
switch ($questionType) {
case 'multi':
$resultsList['answer_list'][$questionID] = WPCW_quiz_MultipleChoice::sanitizeAnswerData($value);
break;
case 'truefalse':
$resultsList['answer_list'][$questionID] = WPCW_quiz_TrueFalse::sanitizeAnswerData($value);
break;
case 'open':
$resultsList['answer_list'][$questionID] = WPCW_quiz_OpenEntry::sanitizeAnswerData($value);
break;
// Ignore uploads as a $_POST field, simply because the files should be stored in $_FILES
// not in $_POST. So if we have a file in $_FILES, that's clearly an issue.
// Ignore uploads as a $_POST field, simply because the files should be stored in $_FILES
// not in $_POST. So if we have a file in $_FILES, that's clearly an issue.
case 'upload':
break;
}
}
// end of question check
}
// end of potential answers loop
// ### 1B Check for file uploads if the quiz requires them. Only check for uploads
// if the quiz details say there should be some uploads.
if ($quizDetails->want_uploads) {
$uploadResultList = WPCW_quiz_FileUpload::validateFiles($_FILES, $quizDetails);
// Merge the valid results.
// Basically if a file has been uploaded correctly, that answer is marked as being set.
if (count($uploadResultList['upload_valid']) > 0) {
$resultsList['answer_list'] = $resultsList['answer_list'] + $uploadResultList['upload_valid'];
}
// Merge the error results
if (count($uploadResultList['upload_errors']) > 0) {
$resultsList['error_answer_list'] = $resultsList['error_answer_list'] + $uploadResultList['upload_errors'];
}
}
// ### 2 - Check that we have enough answers given how many questions there are.
// If there are not enough answers, then re-render the form with the answered questions
// marked, and highlight the fields that have errors.
if ($quizDetails->questions && count($resultsList['answer_list']) < count($quizDetails->questions)) {
// Error - not all questions are answered
echo WPCW_units_createErrorMessage(__('Please provide an answer for all of the questions.', 'wp_courseware'));
// Show the form with the questions that have been completed already.
echo WPCW_quizzes_handleQuizRendering($quizDetails->parent_unit_id, $quizDetails, $resultsList);
// User may not continue - as quiz is not complete.
return false;
}
// Flag to indicate if grading is needed before the user continues.
$gradingNeeded = false;
$gradingNeededBeforeContinue = false;
// ### 3 - Do we need to check for correct answers?
if ('survey' == $quizDetails->quiz_type) {
// Never try to show answers. There aren't any.
$quizDetails->quiz_show_answers = 'hide_answers';
// No answers to check. Say thanks
echo WPCW_units_createSuccessMessage(__('Thank you for your responses. This unit is now complete.', 'wp_courseware'));
} else {
$resultDetails = WPCW_quizzes_checkForCorrectAnswers($quizDetails, $resultsList['answer_list']);
// #### Step A - have open-ended questions that need marking.
if (!empty($resultDetails['needs_marking'])) {
$gradingNeeded = true;
$courseDetails = WPCW_courses_getCourseDetails($quizDetails->parent_course_id);
// Non-blocking quiz - so allowed to continue, but will be graded later.
if ('quiz_noblock' == $quizDetails->quiz_type) {
echo WPCW_units_createSuccessMessage($courseDetails->course_message_quiz_open_grading_non_blocking);
} else {
echo WPCW_units_createSuccessMessage($courseDetails->course_message_quiz_open_grading_blocking);
// Grading is needed before they continue, but don't want them to re-take the quiz.
$gradingNeededBeforeContinue = true;
}
} else {
// Copy over the wrong answers.
$resultsList['wrong_answer_list'] = $resultDetails['wrong'];
// Some statistics
$correctCount = count($resultDetails['correct']);
$totalQuestions = count($quizDetails->questions);
$correctPercentage = number_format($correctCount / $totalQuestions * 100, 1);
// Non-blocking quiz.
if ('quiz_noblock' == $quizDetails->quiz_type) {
// Store user quiz results
echo WPCW_units_createSuccessMessage(sprintf(__('You got <b>%d out of %d (%d%%)</b> questions correct! This unit is now complete.', 'wp_courseware'), $correctCount, $totalQuestions, $correctPercentage));
// Notify the user of their grade.
do_action('wpcw_quiz_graded', $userID, $quizDetails, $correctPercentage, false);
} else {
$minPassQuestions = $totalQuestions * ($quizDetails->quiz_pass_mark / 100);
// They've passed. Report how many they got right.
if ($correctPercentage >= $quizDetails->quiz_pass_mark) {
echo WPCW_units_createSuccessMessage(sprintf(__('You got <b>%d out of %d (%d%%)</b> questions correct! This unit is now complete.', 'wp_courseware'), $correctCount, $totalQuestions, $correctPercentage));
// Notify the user of their grade.
do_action('wpcw_quiz_graded', $userID, $quizDetails, $correctPercentage, false);
} else {
echo WPCW_units_createErrorMessage(sprintf(__('Unfortunately, you only got <b>%d out of %d (%d%%)</b> questions correct. You need to correctly answer <b>at least %d questions (%d%%)</b>.', 'wp_courseware'), $correctCount, $totalQuestions, $correctPercentage, $minPassQuestions, $quizDetails->quiz_pass_mark));
// Show form with error answers.
echo WPCW_quizzes_handleQuizRendering($quizDetails->parent_unit_id, $quizDetails, $resultsList);
// Errors, so the user cannot progress yet.
return false;
}
}
// end of blocking quiz check
}
}
// end of survey check
// ### 4 - Show the correct answers to the user?
if ('show_answers' == $quizDetails->quiz_show_answers) {
echo WPCW_quizzes_showAllCorrectAnswers($quizDetails);
}
// ### 5 - Save the user progress
WPCW_quizzes_saveUserProgress($userID, $quizDetails, $resultDetails, $resultsList['answer_list']);
// Questions need grading, notify the admin
if ($gradingNeeded) {
// Notify the admin that questions need answering.
do_action('wpcw_quiz_needs_grading', $userID, $quizDetails);
}
// Questions need grading, so don't allow user to continue
if ($gradingNeededBeforeContinue) {
return false;
}
// If we get this far, the user may progress to next unit
return true;
}
/**
* Function that allows a question to be edited.
*/
function WPCW_showPage_ModifyQuestion_load()
{
$page = new PageBuilder(true);
$page->showPageHeader(__('Edit Single Question', 'wp_courseware'), '70%', WPCW_icon_getPageIconURL());
$questionID = false;
// Check POST and GET
if (isset($_GET['question_id'])) {
$questionID = $_GET['question_id'] + 0;
} else {
if (isset($_POST['question_id'])) {
$questionID = $_POST['question_id'] + 0;
}
}
// Trying to edit a question
$questionDetails = WPCW_questions_getQuestionDetails($questionID, true);
// Abort if question not found.
if (!$questionDetails) {
$page->showMessage(__('Sorry, but that question could not be found.', 'wp_courseware'), true);
$page->showPageFooter();
return;
}
// See if the question has been submitted for saving.
if ('true' == WPCW_arrays_getValue($_POST, 'question_save_mode')) {
WPCW_handler_questions_processSave(false, true);
$page->showMessage(__('Question successfully updated.', 'wp_courseware'));
// Assume save has happened, so reload the settings.
$questionDetails = WPCW_questions_getQuestionDetails($questionID, true);
}
// Manually set the order to zero, as not needed for ordering in this context.
$questionDetails->question_order = 0;
switch ($questionDetails->question_type) {
case 'multi':
$quizObj = new WPCW_quiz_MultipleChoice($questionDetails);
break;
case 'truefalse':
$quizObj = new WPCW_quiz_TrueFalse($questionDetails);
break;
case 'open':
$quizObj = new WPCW_quiz_OpenEntry($questionDetails);
break;
case 'upload':
$quizObj = new WPCW_quiz_FileUpload($questionDetails);
break;
default:
die(__('Unknown quiz type: ', 'wp_courseware') . $questionDetails->question_type);
break;
}
$quizObj->showErrors = true;
$quizObj->needCorrectAnswers = true;
$quizObj->hideDragActions = true;
// #wpcw_quiz_details_questions = needed for media uploader
// .wpcw_question_holder_static = needed for wrapping the question using existing HTML.
printf('<div id="wpcw_quiz_details_questions"><ul class="wpcw_question_holder_static">');
// Create form wrapper, so that we can save this question.
printf('<form method="POST" action="%s?page=WPCW_showPage_ModifyQuestion&question_id=%d" />', admin_url('admin.php'), $questionDetails->question_id);
// Question hidden fields
printf('<input name="question_id" type="hidden" value="%d" />', $questionDetails->question_id);
printf('<input name="question_save_mode" type="hidden" value="true" />');
// Show the quiz so that it can be edited. We're re-using the code we have for editing questions,
// to save creating any special form edit code.
echo $quizObj->editForm_toString();
// Save and return buttons.
printf('<div class="wpcw_button_group"><br/>');
printf('<a href="%s?page=WPCW_showPage_QuestionPool" class="button-secondary">%s</a> ', admin_url('admin.php'), __('« Return to Question Pool', 'wp_courseware'));
printf('<input type="submit" class="button-primary" value="%s" />', __('Save Question Details', 'wp_courseware'));
printf('</div>');
printf('</form>');
printf('</ul></div>');
$page->showPageFooter();
}
/**
* Show the forms where the quiz answers can be editied.
*
* @param Integer $quizID the ID of the quiz to be edited.
* @param Object $page The associated page object for showing messages.
*/
function WPCW_showPage_ModifyQuiz_showQuizEntryForms($quizID, $page)
{
// Handle the saving of quiz questions
WPCW_showPage_ModifyQuiz_showQuizEntryForms_processSave($quizID, $page);
global $wpdb, $wpcwdb;
$wpdb->show_errors();
// Work out if we need correct answers or not. And what the pass mark is.
$quizDetails = WPCW_quizzes_getQuizDetails($quizID, true);
$needCorrectAnswers = 'survey' != $quizDetails->quiz_type;
// Got URL in action to ensure we go to top of page to see the success message.
printf('<form method="post" id="wpcw_question_update_form" action="%s&quiz_id=%d">', admin_url('admin.php?page=WPCW_showPage_ModifyQuiz'), $quizID);
// Show the existing quiz questions as a series of forms.
$quizItems = WPCW_quizzes_getListOfQuestions($quizID);
// Show the number of correct answers the user must get in order to pass.
if ('quiz_block' == $quizDetails->quiz_type) {
$totalQs = count($quizItems);
$passQs = ceil($quizDetails->quiz_pass_mark / 100 * $totalQs);
printf('<div class="wpcw_msg wpcw_msg_info">');
printf(__('The trainee will be required to correctly answer at least <b>%d of the %d</b> following questions (<b>at least %d%%</b>) to progress.', 'wp_courseware'), $passQs, $totalQs, $quizDetails->quiz_pass_mark);
printf('</div>');
}
// Got a quiz, and trainer is requiring to show answers. Tell them we can't show answers
// as this quiz contains open-ended questions that need grading.
if ($needCorrectAnswers && 'show_answers' == $quizDetails->quiz_show_answers && WPCW_quizzes_containsQuestionsNeedingManualGrading($quizItems)) {
printf('<div class="wpcw_msg wpcw_msg_error">');
printf(__('This quiz contains questions that need <b>manual grading</b>, and you\'ve selected \'<b>Show Answers</b>\' when the user completes this quiz. ', 'wp_courseware') . '<br/><br/>' . __('Since answers cannot be shown to the user because they are not known at that stage, <b>answers cannot be shown</b>. To hide this message, select \'<b>No Answers</b>\' above.'));
printf('</div>');
}
$errorCount = 0;
global $errorCount;
// Wrapper for questions
printf('<ol class="wpcw_dragable_question_holder">');
if ($quizItems) {
// Render edit form for each of the quizzes that already exist
foreach ($quizItems as $quizItem) {
switch ($quizItem->question_type) {
case 'multi':
$quizObj = new WPCW_quiz_MultipleChoice($quizItem);
break;
case 'truefalse':
$quizObj = new WPCW_quiz_TrueFalse($quizItem);
break;
case 'open':
$quizObj = new WPCW_quiz_OpenEntry($quizItem);
break;
case 'upload':
$quizObj = new WPCW_quiz_FileUpload($quizItem);
break;
default:
die(__('Unknown quiz type: ', 'wp_courseware') . $quizItem->question_type);
break;
}
$quizObj->showErrors = true;
$quizObj->needCorrectAnswers = $needCorrectAnswers;
// Keep track of errors
if ($quizObj && $quizObj->gotError) {
$errorCount++;
}
echo $quizObj->editForm_toString();
}
}
printf('</ol>');
// Do any of the questions have residual errors? Tell the user.
if ($errorCount > 0) {
$page->showMessage(sprintf(__('%d of the questions below have errors. Please make corrections and then save the changes.', 'wp_courseware'), $errorCount), true);
}
$page->showPageMiddle('35%');
// Show the menu for saving and adding new items.
WPCW_showPage_ModifyQuiz_FloatMenu($page);
// Flag to indicate that questions have been updated.
printf('<input type="hidden" name="survey_updated" value="survey_updated" />');
printf('</form><a name="new_question"></a>');
// The empty forms for adding a new question
$quizItemDummy = new stdClass();
$quizItemDummy->question_question = '';
$quizItemDummy->question_answers = "\n\n\n";
$quizItemDummy->question_correct_answer = false;
$quizItemDummy->question_order = 0;
$quizItemDummy->question_answer_type = false;
$quizItemDummy->question_answer_hint = false;
$quizItemDummy->question_answer_file_types = 'doc, pdf, jpg, png, jpeg, gif';
$quizFormsToCreate = array('new_multi' => 'WPCW_quiz_MultipleChoice', 'new_tf' => 'WPCW_quiz_TrueFalse', 'new_open' => 'WPCW_quiz_OpenEntry', 'new_upload' => 'WPCW_quiz_FileUpload');
// Create the dummy quiz objects
foreach ($quizFormsToCreate as $dummyid => $objClass) {
// Set placeholder class
$quizItemDummy->question_id = $dummyid;
// Create new object and set it up with defaults
$quizObj = new $objClass($quizItemDummy);
$quizObj->cssClasses = 'wpcw_question_template';
$quizObj->showErrors = false;
$quizObj->needCorrectAnswers = $needCorrectAnswers;
echo $quizObj->editForm_toString();
}
}
