/**
* Get the entry IDs that have at least one quiz pending.
*
* @return array
*/
protected function get_pending_quiz_entries()
{
if (null === $this->pending_quiz_entries) {
if (is_array($this->items)) {
$entry_ids = array();
foreach ($this->items as $item) {
$entry_ids[] = $item['ID'];
}
$this->pending_quiz_entries = Edr_Manager::get('edr_quizzes')->check_for_pending_quizzes($entry_ids);
} else {
$this->pending_quiz_entries = array();
}
}
return $this->pending_quiz_entries;
}
/**
* Test the "can_view_certificate" method.
*/
public function testCanViewCertificate()
{
global $current_user;
// Create student.
$student1_id = wp_insert_user(array('user_login' => 'student1', 'user_pass' => '123456', 'role' => 'student'));
// Create entry.
$entry = Edr_Crt_Test::get_instance()->addEntry(array('user_id' => $student1_id, 'course_id' => 1, 'entry_status' => 'complete'));
// Create certificate.
$edr_crt = Edr_Manager::get('edr_crt');
$certificate_id = $edr_crt->create_certificate($entry);
$certificate = get_post($certificate_id);
// Guest user.
$this->assertEquals(0, get_current_user_id());
$this->assertFalse($edr_crt->can_view_certificate($certificate));
// Student 1.
$current_user = new WP_User($student1_id);
$this->assertEquals($student1_id, get_current_user_id());
$this->assertTrue($edr_crt->can_view_certificate($certificate));
// Administrator.
$current_user = new WP_User(1);
$this->assertEquals(1, get_current_user_id());
$this->assertTrue($edr_crt->can_view_certificate($certificate));
}
public function testAddAnswer()
{
$quizzes = Edr_Manager::get('edr_quizzes');
$questions = $quizzes->get_questions($this->lessons[0]);
$question1 = reset($questions);
$choices = $quizzes->get_choices($this->lessons[0], true);
$choice1 = reset($choices[$question1->ID]);
$grade_id = $quizzes->add_grade(array('lesson_id' => $this->lessons[0], 'entry_id' => $this->entries['inprogress'], 'grade' => 80.29000000000001, 'status' => 'approved'));
$answer_data = array('question_id' => $question1->ID, 'grade_id' => $grade_id, 'entry_id' => $this->entries['inprogress'], 'correct' => $choice1->correct, 'choice_id' => $choice1->ID, 'answer_text' => 'abc');
$quizzes->add_answer($answer_data);
// Get original answer data as object.
$original_answer_object = new stdClass();
foreach ($answer_data as $key => $value) {
$original_answer_object->{$key} = $value;
}
// Get the created answer.
$answers = $quizzes->get_answers($grade_id);
$answer = reset($answers);
unset($answer->ID);
$this->assertEquals($original_answer_object, $answer);
}
/**
* Output the data for the custom columns on the certificates list page.
*
* @param string $column
* @param int $post_id
* @return array
*/
public function output_certificate_column_values($column, $post_id)
{
switch ($column) {
case 'student':
$student_id = get_post_meta($post_id, 'student_id', true);
if ($student_id && ($student = get_user_by('id', $student_id))) {
echo esc_html(Edr_Manager::get('edr_crt')->get_student_name($student));
}
break;
case 'course':
$course_id = get_post_meta($post_id, 'course_id', true);
if ($course_id && ($course = get_post($course_id))) {
echo esc_html($course->post_title);
}
break;
case 'date_created':
the_date();
break;
}
}
/**
* Display the "view certificate" link in the completed courses table.
*
* @param array $values
* @param string $status
* @param IB_Educator_Entry $entry
* @return array
*/
public function my_courses_certificate_link($values, $status, $entry)
{
if ('complete' == $status) {
$certificate_url = Edr_Manager::get('edr_crt')->get_certificate_url($entry->ID);
if (!empty($certificate_url)) {
if (!isset($values['actions'])) {
$values['actions'] = '<td><a href="' . esc_url($certificate_url) . '" target="_blank">' . __('View Certificate', 'edr-crt') . '</a></td>';
}
} else {
if (!isset($values['actions'])) {
$values['actions'] = '<td></td>';
}
}
}
return $values;
}
<?php
$quizzes = Edr_Manager::get('edr_quizzes');
$lesson_id = (int) $post->ID;
$attempts_number = get_post_meta($lesson_id, '_edr_attempts', true);
if (!$attempts_number) {
$attempts_number = 1;
}
?>
<h2><?php
_e('Settings', 'ibeducator');
?>
</h2>
<div class="ib-edu-field">
<div class="ib-edu-label">
<label for="edr-attempts-number"><?php
_e('Number of attempts', 'ibeducator');
?>
</label>
</div>
<div class="ib-edu-control">
<input type="number" id="edr-attempts-number" name="_edr_attempts" value="<?php
echo intval($attempts_number);
?>
">
</div>
</div>
<h2><?php
/**
* Submit quiz.
*/
public static function submit_quiz()
{
if (empty($_POST)) {
return;
}
$lesson_id = get_the_ID();
check_admin_referer('edr_submit_quiz_' . $lesson_id);
$user_id = get_current_user_id();
if (!$user_id) {
return;
}
$quizzes = Edr_Manager::get('edr_quizzes');
$questions = $quizzes->get_questions($lesson_id);
if (empty($questions)) {
return;
}
if (!isset($_POST['answers']) || !is_array($_POST['answers'])) {
// No answers.
ib_edu_message('quiz', 'empty-answers');
return;
} else {
foreach ($questions as $question) {
if (empty($_POST['answers'][$question->ID])) {
// Not all questions were answered.
ib_edu_message('quiz', 'empty-answers');
return;
}
}
}
$entry = IB_Educator::get_instance()->get_entry(array('user_id' => $user_id, 'course_id' => ib_edu_get_course_id($lesson_id), 'entry_status' => 'inprogress'));
$entry_id = $entry ? $entry->ID : 0;
if (!$entry_id && 'ib_educator_lesson' == get_post_type()) {
return;
}
$max_attempts_number = $quizzes->get_max_attempts_number($lesson_id);
if (!is_numeric($max_attempts_number)) {
$max_attempts_number = 1;
}
$attempts_number = $quizzes->get_attempts_number($lesson_id, $entry_id);
// Check if the student exceeded the number of allowed attempts.
if ($attempts_number >= $max_attempts_number) {
return;
}
// Add initial grade data to the database.
$grade_id = $quizzes->add_grade(array('lesson_id' => $lesson_id, 'entry_id' => $entry_id, 'user_id' => $user_id, 'grade' => 0, 'status' => 'pending'));
if (!$grade_id) {
return;
}
$user_answer = '';
$correct = 0;
$automatic_grade = true;
$choices = $quizzes->get_choices($lesson_id, true);
// Check answers to the quiz questions.
foreach ($questions as $question) {
// Every question type needs a specific way to check for the valid answer.
switch ($question->question_type) {
// Multiple Choice Question.
case 'multiplechoice':
$user_answer = absint($_POST['answers'][$question->ID]);
if (isset($choices[$question->ID]) && isset($choices[$question->ID][$user_answer])) {
$choice = $choices[$question->ID][$user_answer];
$answer_data = apply_filters('edr_submit_answer_pre', array('question_id' => $question->ID, 'grade_id' => $grade_id, 'entry_id' => $entry_id, 'correct' => $choice->correct, 'choice_id' => $choice->ID), $question);
$added = $quizzes->add_answer($answer_data);
if (1 == $choice->correct) {
++$correct;
}
}
break;
// Written Answer Question.
// Written Answer Question.
case 'writtenanswer':
// We cannot check written answers automatically.
if ($automatic_grade) {
$automatic_grade = false;
}
$user_answer = stripslashes($_POST['answers'][$question->ID]);
if (empty($user_answer)) {
continue;
}
$answer_data = apply_filters('edr_submit_answer_pre', array('question_id' => $question->ID, 'grade_id' => $grade_id, 'entry_id' => $entry_id, 'correct' => -1, 'answer_text' => $user_answer), $question);
$added = $quizzes->add_answer($answer_data);
break;
}
}
if ($automatic_grade) {
$quizzes->update_grade($grade_id, array('grade' => round($correct / count($questions) * 100), 'status' => 'approved'));
}
wp_redirect(ib_edu_get_endpoint_url('edu-message', 'quiz-submitted', get_permalink()));
exit;
}
/**
* Get the entries with ungraded quizzes.
*
* @param array $ids
* @return array
*/
public function check_quiz_pending($ids)
{
_ib_edu_deprecated_function('IB_Educator::check_quiz_pending', '1.6', 'Edr_Quizzes::check_for_pending_quizzes');
return Edr_Manager::get('edr_quizzes')->check_for_pending_quizzes($ids);
}
/**
* AJAX: add grade for a quiz.
*/
public static function quiz_grade()
{
global $wpdb;
$entry_id = isset($_POST['entry_id']) ? absint($_POST['entry_id']) : 0;
$lesson_id = isset($_POST['lesson_id']) ? absint($_POST['lesson_id']) : 0;
// Verify nonce.
if (!isset($_POST['_wpnonce']) || !wp_verify_nonce($_POST['_wpnonce'], 'edr_edit_progress_' . $entry_id)) {
exit;
}
// Verify capabilities.
if (!current_user_can('edit_ib_educator_lesson', $lesson_id)) {
exit;
}
$quizzes = Edr_Manager::get('edr_quizzes');
$quiz_grade = $quizzes->get_grade($lesson_id, $entry_id);
if (!$quiz_grade) {
exit;
}
$grade = isset($_POST['grade']) ? floatval($_POST['grade']) : 0;
$quizzes->update_grade($quiz_grade->ID, array('grade' => $grade, 'status' => 'approved'));
// Send notification email to the student.
$entry = edr_get_entry($entry_id);
$student = get_user_by('id', $entry->user_id);
if ($student) {
$lesson_title = get_the_title($lesson_id);
ib_edu_send_notification($student->user_email, 'quiz_grade', array('lesson_title' => $lesson_title), array('student_name' => $student->display_name, 'lesson_title' => $lesson_title, 'grade' => ib_edu_format_grade($grade)));
}
echo json_encode(array('status' => 'success'));
exit;
}