public static function get_response_grade($response_id, $data = '')
{
$grade_data = get_post_meta($response_id, 'response_grade');
$module_id = wp_get_post_parent_id($response_id);
$autograde_modules = Unit_Module::auto_grade_modules();
$module_type = get_post_meta($module_id, 'module_type', true);
// Check if this needs to be auto graded
if (in_array($module_type, $autograde_modules) && 100 > $grade_data[0]['grade']) {
$grade = $grade_data[0]['grade'];
$response = get_post($response_id);
$student_id = $response->post_author;
$unit_id = get_post_ancestors($module_id);
$unit_id = $unit_id[0];
$course_id = get_post_meta($unit_id, 'course_id', true);
// Multiple or single correct answer?
$correct_answers = get_post_meta($module_id, 'checked_answer', true);
$correct_answers = empty($correct_answers) ? get_post_meta($module_id, 'checked_answers', true) : $correct_answers;
if (!is_array($correct_answers)) {
if (trim($response->post_content) == trim($correct_answers)) {
$grade = 100;
}
} else {
$student_answers = get_post_meta($response_id, 'student_checked_answers');
if (count($student_answers) !== 0) {
$cleaned_answers = array();
foreach ($correct_answers as $answer) {
$value = stripslashes($answer);
$value = strip_tags($value);
$value = htmlentities($value);
$cleaned_answers[] = $value;
}
$right_answers = $cleaned_answers;
$cleaned_response = array();
foreach ($student_answers as $answer) {
$value = stripslashes($answer);
$value = strip_tags($value);
$value = htmlentities($value);
$cleaned_response[] = $value;
}
$chosen_answers = $cleaned_response;
$grade = 0;
foreach ($chosen_answers as $chosen_answer) {
if (in_array($chosen_answer, $right_answers)) {
$grade = $grade + 100;
} else {
//$response_grade = $response_grade + 0;//this line can be empty as well : )
}
}
if (count($chosen_answers) >= count($right_answers)) {
$grade_cnt = count($chosen_answers);
} else {
$grade_cnt = count($right_answers);
}
$grade = round($grade / $grade_cnt, 0);
}
}
Unit_Module::save_response_grade($response_id, $grade, $student_id, $course_id, $unit_id, $module_id);
}
if ($grade_data) {
if ($data !== '') {
return $grade_data[0][$data];
} else {
return $grade_data[0];
}
} else {
}
}
