/**
* Handle showing the box that allows a user to mark a unit as completed.
*/
function WPCW_units_processUnitContent($content)
{
// #### Ensure we're only showing a course unit, a single item
if (!is_single() || 'course_unit' != get_post_type()) {
return $content;
}
global $post;
// #### Get associated data for this unit. No course/module data, not a unit
$parentData = WPCW_units_getAssociatedParentData($post->ID);
if (!$parentData) {
return $content;
}
// #### Ensure we're logged in
$user_id = get_current_user_id();
if ($user_id == 0) {
// Return no access error without content
return WPCW_units_createErrorMessage($parentData->course_message_unit_not_logged_in);
}
$userProgress = new UserProgress($parentData->course_id, $user_id);
// #### User not allowed access to content, so certainly can't say they've done this unit.
if (!$userProgress->canUserAccessCourse()) {
// Return no access error without content
return WPCW_units_createErrorMessage($parentData->course_message_unit_no_access);
}
// #### Is user allowed to access this unit yet?
if (!$userProgress->canUserAccessUnit($post->ID)) {
// Return no access error without content
return WPCW_units_createErrorMessage($parentData->course_message_unit_not_yet);
}
// #### Determine if this unit has been completed or not.
$progressDetails = WPCW_units_getUserUnitDetails($user_id, $post->ID);
$completed = $progressDetails && $progressDetails->unit_completed_status == 'complete';
// #### Show completion box
if ($completed) {
$completionBox = WPCW_units_getCompletionBox_complete($parentData, $post->ID, $user_id);
} else {
$completionBox = WPCW_units_getCompletionBox_pending($parentData, $post->ID);
}
// #### Show the navigation box (disable the next item if not completed yet).
$navigationBox = WPCW_units_getNavigationBox($parentData, $post->ID, $userProgress, !$completed);
return $content . $completionBox . $navigationBox;
}
/**
* Function called when a user is submitting quiz answers via
* the frontend form.
*/
function WPCW_AJAX_units_handleQuizResponse()
{
// Security check
if (!wp_verify_nonce(WPCW_arrays_getValue($_POST, 'progress_nonce'), 'wpcw-progress-nonce')) {
die(__('Security check failed!', 'wp_courseware'));
}
// Quiz ID and Unit ID are combined in the single CSS ID for validation.
// So validate both are correct and that user is allowed to access quiz.
$quizAndUnitID = WPCW_arrays_getValue($_POST, 'id');
// e.g. quiz_complete_69_1 or quiz_complete_17_2 (first ID is unit, 2nd ID is quiz)
if (!preg_match('/quiz_complete_(\\d+)_(\\d+)/', $quizAndUnitID, $matches)) {
echo WPCW_units_getCompletionBox_error();
die;
}
// Use the extracted data for further validation
$unitID = $matches[1];
$quizID = $matches[2];
$user_id = get_current_user_id();
// #### Get associated data for this unit. No course/module data, not a unit
$parentData = WPCW_units_getAssociatedParentData($unitID);
if (!$parentData) {
// No error, as not a valid unit.
die;
}
// #### User not allowed access to content, so certainly can't say they've done this unit.
if (!WPCW_courses_canUserAccessCourse($parentData->course_id, $user_id)) {
// No error, as not a valid unit.
die;
}
// #### Check that the quiz is valid and belongs to this unit
$quizDetails = WPCW_quizzes_getQuizDetails($quizID, true);
if (!($quizDetails && $quizDetails->parent_unit_id == $unitID)) {
die;
}
// Validate the quiz answers... which means we might have to
// send back the form to be re-filled.
$canContinue = WPCW_quizzes_handleQuizRendering_canUserContinueAfterQuiz($quizDetails, $_POST, $user_id);
// Check that user is allowed to progress.
if ($canContinue) {
WPCW_units_saveUserProgress_Complete($user_id, $unitID, 'complete');
// Unit complete, check if course/module is complete too.
do_action('wpcw_user_completed_unit', $user_id, $unitID, $parentData);
// Only complete if allowed to continue.
echo WPCW_units_getCompletionBox_complete($parentData, $unitID, $user_id);
}
die;
}