/**
* Output column content to the lessons list in admin.
*
* @param string $column_name
* @param int $post_id
*/
public static function lessons_column_output($column_name, $post_id)
{
if ('course' == $column_name) {
$course_id = ib_edu_get_course_id($post_id);
if ($course_id && ($course = get_post($course_id))) {
echo '<a href="' . esc_url(get_permalink($course->ID)) . '" target="_blank">' . esc_html($course->post_title) . '</a>';
}
}
}
public static function can_user_access($object, $object_id)
{
$access = false;
$user_id = get_current_user_id();
if ('lesson' == $object) {
$lesson_access = ib_edu_lesson_access($object_id);
if ('public' == $lesson_access) {
$access = true;
} elseif ($user_id) {
if ('logged_in' == $lesson_access) {
$access = true;
} else {
self::set_current_user_courses($user_id);
if (in_array(ib_edu_get_course_id($object_id), self::$current_user_courses)) {
$access = true;
}
}
}
}
return $access;
}
<?php
$api = IB_Educator::get_instance();
// Get entry data for the current student. Entry status must be "inprogress".
$entry = $api->get_entry(array('user_id' => get_current_user_id(), 'course_id' => ib_edu_get_course_id(get_the_ID()), 'entry_status' => 'inprogress'));
if (!$entry) {
return;
}
$lesson_id = get_the_ID();
$questions = $api->get_questions(array('lesson_id' => $lesson_id));
?>
<?php
if ($questions) {
?>
<?php
$message = get_query_var('edu-message');
if (!$message) {
$message = ib_edu_message('quiz');
}
if ($message) {
switch ($message) {
case 'empty-answers':
echo '<div class="ib-edu-message error">' . __('Please answer all questions before submitting the quiz.', 'ibeducator') . '</div>';
break;
case 'quiz-submitted':
echo '<div class="ib-edu-message success">' . __('Thank you. The quiz has been accepted.', 'ibeducator') . '</div>';
break;
}
}
$quiz_submitted = $api->is_quiz_submitted($lesson_id, $entry->ID);
the_post();
?>
<section class="section-content">
<div class="container clearfix">
<div class="main-content">
<?php
IB_Educator_View::template_part('content', 'single-lesson');
?>
</div>
<div class="page-sidebar">
<?php
$lesson_id = get_the_ID();
$api = IB_Educator::get_instance();
$lessons = $api->get_lessons(ib_edu_get_course_id($lesson_id));
if ($lessons->have_posts()) {
$cl = null;
if (class_exists('IB_Educator_Completed_Lessons')) {
$cl = IB_Educator_Completed_Lessons::get_instance();
}
echo '<aside class="widget"><h1 class="widget-title">' . __('Lessons', 'ib-educator') . '</h1>';
echo '<ul class="lessons-nav">';
while ($lessons->have_posts()) {
$lessons->the_post();
$classes = null;
if ($cl) {
$classes = $cl->add_lesson_class(array(), get_the_ID());
}
if ($lesson_id == get_the_ID()) {
?>
/**
* Get the adjacent lesson.
*
* @param bool $previous
* @return mixed If global post object is not set returns null, if post is not found, returns empty string, else returns WP_Post.
*/
function ib_edu_get_adjacent_lesson($previous = true)
{
global $wpdb;
if (!($lesson = get_post())) {
return null;
}
$course_id = ib_edu_get_course_id($lesson->ID);
$cmp = $previous ? '<' : '>';
$order = $previous ? 'DESC' : 'ASC';
$join = "INNER JOIN {$wpdb->postmeta} pm ON pm.post_id = p.ID";
$where = $wpdb->prepare("WHERE p.post_type = 'ib_educator_lesson' AND p.post_status = 'publish' AND p.menu_order {$cmp} %d AND pm.meta_key = '_ibedu_course' AND pm.meta_value = %d", $lesson->menu_order, $course_id);
$sort = "ORDER BY p.menu_order {$order}";
$query = "SELECT p.ID FROM {$wpdb->posts} as p {$join} {$where} {$sort} LIMIT 1";
$result = $wpdb->get_var($query);
if (null === $result) {
return '';
}
return get_post($result);
}
/**
* This template renders a quiz.
*
* @version 1.1.0
*/
$user_id = get_current_user_id();
if ($user_id == 0) {
echo '<p>';
printf(__('You must be <a href="%s">logged in</a> to take the quiz.', 'ibeducator'), esc_url(wp_login_url(get_permalink())));
echo '</p>';
return;
}
$lesson_id = get_the_ID();
// Get entry data for the current student. Entry status must be "inprogress".
$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;
}
$quizzes = Edr_Manager::get('edr_quizzes');
$questions = $quizzes->get_questions($lesson_id);
?>
<?php
if (!empty($questions)) {
?>
<?php
$message = get_query_var('edu-message');
if (!$message) {
$message = ib_edu_message('quiz');
/**
* Submit quiz.
*/
public static function submit_quiz()
{
if (empty($_POST)) {
return;
}
$lesson_id = get_the_ID();
$user_id = get_current_user_id();
$api = IB_Educator::get_instance();
// Verify nonce.
check_admin_referer('ibedu_submit_quiz_' . $lesson_id);
// Get questions.
$questions = $api->get_questions(array('lesson_id' => $lesson_id));
if (!$questions) {
return;
}
$num_questions = count($questions);
$num_answers = 0;
if (!isset($_POST['answers'])) {
// The student has to submit the answers to all questions.
ib_edu_message('quiz', 'empty-answers');
return;
} elseif (is_array($_POST['answers'])) {
// Count answers.
foreach ($_POST['answers'] as $answer) {
if (!empty($answer)) {
++$num_answers;
}
}
if ($num_answers != $num_questions) {
// Not all questions were answered.
ib_edu_message('quiz', 'empty-answers');
return;
}
}
// Get entry.
$entry = $api->get_entry(array('user_id' => $user_id, 'course_id' => ib_edu_get_course_id($lesson_id), 'entry_status' => 'inprogress'));
if (!$entry) {
return;
}
if ($api->is_quiz_submitted($lesson_id, $entry->ID)) {
// Quiz has been submitted already.
return;
}
$user_answer = '';
$answered = 0;
$correct = 0;
$automatic_grade = true;
$choices = $api->get_choices($lesson_id, true);
// Check answers to the quiz questions.
foreach ($questions as $question) {
if (!isset($_POST['answers'][$question->ID])) {
// Student has to submit an answer.
continue;
}
// Every question type needs a specific way to check for the valid answer.
switch ($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];
// Add answer to database.
$added = $api->add_student_answer(array('question_id' => $question->ID, 'entry_id' => $entry->ID, 'correct' => $choice->correct, 'choice_id' => $choice->ID));
if (1 == $added) {
++$answered;
}
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;
}
// Add answer to database.
$added = $api->add_student_answer(array('question_id' => $question->ID, 'entry_id' => $entry->ID, 'correct' => -1, 'answer_text' => $user_answer));
if (1 == $added) {
++$answered;
}
break;
}
}
if ($answered == $num_questions) {
$grade_data = array('lesson_id' => $lesson_id, 'entry_id' => $entry->ID);
if ($automatic_grade) {
$grade_data['grade'] = round($correct / $answered * 100);
$grade_data['status'] = 'approved';
} else {
$grade_data['grade'] = 0;
$grade_data['status'] = 'pending';
}
$api->add_quiz_grade($grade_data);
wp_redirect(ib_edu_get_endpoint_url('edu-message', 'quiz-submitted', get_permalink()));
exit;
}
}
/**
* 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;
}
?>
</h1>
<div id="ib-edu-breadcrumbs"><?php
ib_edu_breadcrumbs();
?>
</div>
<div class="lesson-content entry-content">
<?php
if ($student_can_study) {
the_content();
Edr_View::template_part('quiz');
} else {
echo '<p>';
printf(__('Please register for the %s to view this lesson.', 'ibeducator'), '<a href="' . esc_url(get_permalink(ib_edu_get_course_id())) . '">' . __('course', 'ibeducator') . '</a>');
echo '</p>';
}
?>
</div>
<nav class="ib-edu-lesson-nav">
<?php
echo ib_edu_get_adjacent_lesson_link('previous', '<div class="nav-previous">« %link</div>', __('Previous Lesson', 'ibeducator'));
echo ib_edu_get_adjacent_lesson_link('next', '<div class="nav-next">%link »</div>', __('Next Lesson', 'ibeducator'));
?>
</nav>
</article>
<?php
// Comments.
<?php
if ($student_can_study) {
?>
<div class="preview space-30">
<?php
get_template_part('templates/content/content', get_post_format());
?>
</div>
<?php
the_content();
Edr_View::template_part('quiz');
} else {
echo '<p>';
printf(esc_html__('Please register for the %s to view this lesson.', 'training'), '<a href="' . esc_url(get_permalink(ib_edu_get_course_id())) . '">' . esc_html__('course', 'training') . '</a>');
echo '</p>';
}
?>
</div>
<nav class="ib-edu-lesson-nav">
<?php
echo ib_edu_get_adjacent_lesson_link('previous', '<div class="nav-previous">« %link</div>', esc_html__('Previous Lesson', 'training'));
echo ib_edu_get_adjacent_lesson_link('next', '<div class="nav-next">%link »</div>', esc_html__('Next Lesson', 'training'));
?>
</nav>
</article>
</div>
</div>