/**
* Function to get all of the quiz details.
*
* @param Integer $quizID The ID of the quiz for which we want to get details.
* @param Boolean $getQuestionsToo If true, get the questions for the quiz too.
* @param Boolean $resolveRandomQuestions If true, convert any randomised questions to live questions.
* @param Integer $userID The ID of the user to resolve the questions to.
*
* @return Object The details of the quiz as an object.
*/
function WPCW_quizzes_getQuizDetails($quizID, $getQuestionsToo = false, $resolveRandomQuestions = false, $userID)
{
if (!$quizID) {
return false;
}
global $wpcwdb, $wpdb;
$wpdb->show_errors();
$SQL = $wpdb->prepare("SELECT * \n\t\t\tFROM {$wpcwdb->quiz}\t\n\t\t\tWHERE quiz_id = %d \n\t\t\t", $quizID);
$quizObj = $wpdb->get_row($SQL);
// Nothing found
if (!$quizObj) {
return false;
}
// Add flag indicating if random questions are resolved or not.
$quizObj->resolved_random_questions = $resolveRandomQuestions;
if ($getQuestionsToo) {
// Something found, so return the questions for this quiz too.
$quizObj->questions = WPCW_quizzes_getListOfQuestions($quizObj->quiz_id);
// Check if we need to expand any random questions
if ($resolveRandomQuestions && $userID > 0 && !empty($quizObj->questions)) {
$questionListToRender = array();
foreach ($quizObj->questions as $question) {
switch ($question->question_type) {
// Got a random selection - extract these questions
case 'random_selection':
$quObj = new WPCW_quiz_RandomSelection($question);
$randList = $quObj->questionSelection_getLockedQuestionSelection($userID, $quizObj->parent_unit_id);
// Append the random questions.
if (!empty($randList)) {
$questionListToRender += $randList;
}
break;
// Got a standard question
// Got a standard question
case 'multi':
case 'open':
case 'upload':
case 'truefalse':
$questionListToRender[$question->question_id] = $question;
break;
// Not expecting anything here... so not handling the error case.
// Not expecting anything here... so not handling the error case.
default:
die(__('Unexpected question type, aborting.', 'wp_courseware'));
break;
}
// end switch
}
// end foreach
// Overwrite existing questions
$quizObj->questions = $questionListToRender;
}
// end if we want to expand random questions
}
// Simple flag to see if we have open questions or not.
$quizObj->has_open_questions = false;
// Are we expecting any uploads? If so, set a flag to make answer processing faster.
$quizObj->want_uploads = false;
if (!empty($quizObj->questions)) {
foreach ($quizObj->questions as $quizID => $quizItem) {
// We're searching for an upload anyway, so check for an open question
if ('upload' == $quizItem->question_type) {
$quizObj->want_uploads = true;
$quizObj->has_open_questions = true;
break;
}
}
// Not found an open question yet even though we checked for uploads.
if (!$quizObj->has_open_questions) {
foreach ($quizObj->questions as $quizID => $quizItem) {
// Look for an open question (already checked uploads). This s
// saves some computation time.
if ('open' == $quizItem->question_type) {
$quizObj->has_open_questions = true;
break;
}
}
}
}
return $quizObj;
}
/**
* Show the forms where the quiz answers can be edited.
*
* @param Integer $quizID the ID of the quiz to be edited.
* @param Object $page The associated page object for showing messages.
*/
function WPCW_showPage_ModifyQuiz_showQuestionEntryForms($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, false, false);
$needCorrectAnswers = 'survey' != $quizDetails->quiz_type;
// 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) {
$totalQs = WPCW_quizzes_calculateActualQuestionCount($quizID);
$passQs = ceil($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.', 'wp_courseware'));
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;
case 'random_selection':
$quizObj = new WPCW_quiz_RandomSelection($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('<a name="new_question"></a>');
// The empty forms for adding a new question
$quizItemDummy = new stdClass();
$quizItemDummy->question_question = '';
$quizItemDummy->question_correct_answer = false;
$quizItemDummy->question_order = 0;
$quizItemDummy->question_answer_type = false;
$quizItemDummy->question_answer_hint = false;
$quizItemDummy->question_answer_explanation = false;
$quizItemDummy->question_answer_file_types = 'doc, pdf, jpg, png, jpeg, gif';
$quizItemDummy->question_image = false;
$quizItemDummy->question_usage_count = 0;
$quizItemDummy->question_multi_random_enable = 0;
$quizItemDummy->question_multi_random_count = 5;
// Create some dummy answers.
$quizItemDummy->question_data_answers = serialize(array(1 => array('answer' => ''), 2 => array('answer' => ''), 3 => array('answer' => '')));
$quizFormsToCreate = array('new_multi' => 'WPCW_quiz_MultipleChoice', 'new_tf' => 'WPCW_quiz_TrueFalse', 'new_open' => 'WPCW_quiz_OpenEntry', 'new_upload' => 'WPCW_quiz_FileUpload', 'new_random_selection' => 'WPCW_quiz_RandomSelection');
// Create the dummy quiz objects
foreach ($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;
$quizObj->editForm_questionNotSavedYet = true;
echo $quizObj->editForm_toString();
}
}
/**
* Get the associated quiz for a unit.
* @param Integer $unitID The ID of the unit to get the associated quiz for.
* @return Object The Object of the associated quiz, or false if no quiz found.
*/
function WPCW_quizzes_getAssociatedQuizForUnit($unitID)
{
if (!$unitID) {
return false;
}
global $wpcwdb, $wpdb;
$wpdb->show_errors();
$SQL = $wpdb->prepare("SELECT * \n\t\t\tFROM {$wpcwdb->quiz}\t\n\t\t\tWHERE parent_unit_id = %d \n\t\t\t", $unitID);
$quizObj = $wpdb->get_row($SQL);
// Nothing found
if (!$quizObj) {
return false;
}
// Something found, so return the questions for this quiz too.
$quizObj->questions = WPCW_quizzes_getListOfQuestions($quizObj->quiz_id);
return $quizObj;
}