/**
* Display an offering asset
*
* @return void
*/
public function assetTask()
{
$sparams = new Registry($this->course->offering()->section()->get('params'));
$section_id = $this->course->offering()->section()->get('id');
$asset = new Models\Asset(Request::getInt('asset_id', null));
$asset->set('section_id', $section_id);
// First, check if current user has access to course
if (!$this->course->offering()->access('view')) {
// Is a preview available?
$preview = $sparams->get('preview', 0);
// If no preview is available or if type is form (i.e. you can never preview forms)
if (!$preview || $asset->get('type') == 'form') {
// Check if they're logged in
if (User::isGuest()) {
$this->loginTask(Lang::txt('COM_COURSES_ENROLLMENT_REQUIRED_FOR_ASSET'));
return;
} else {
// Redirect back to the course outline
App::redirect(Route::url($this->course->offering()->link()), Lang::txt('COM_COURSES_ENROLLMENT_REQUIRED_FOR_ASSET'), 'warning');
return;
}
} elseif ($preview == 2) {
$units = $asset->units();
if ($units && count($units) > 0) {
foreach ($units as $unit) {
if ($unit->get('ordering') > 1) {
// Check if they're logged in
if (User::isGuest()) {
$this->loginTask(Lang::txt('COM_COURSES_ENROLLMENT_REQUIRED_FOR_ASSET'));
return;
} else {
// Redirect back to the course outline
App::redirect(Route::url($this->course->offering()->link()), Lang::txt('COM_COURSES_ENROLLMENT_REQUIRED_FOR_ASSET'), 'warning');
return;
}
}
}
}
}
}
// If not a manager and either the offering or section is unpublished...
if (!$this->course->offering()->access('manage') && (!$this->course->offering()->isPublished() || !$this->course->offering()->section()->isPublished())) {
return App::abort(403, Lang::txt('COM_COURSES_ERROR_ASSET_UNAVAILABLE'));
}
if (!$this->course->offering()->access('manage') && !$asset->isAvailable()) {
// Allow expired forms to pass through (i.e. so students can see their results)
if (!$asset->get('type') == 'form' || !$asset->ended()) {
// Redirect back to the course outline
App::redirect(Route::url($this->course->offering()->link()), Lang::txt('COM_COURSES_ERROR_ASSET_UNAVAILABLE'), 'warning');
return;
}
}
// Check prerequisites
$member = $this->course->offering()->section()->member(User::get('id'));
if (is_null($member->get('section_id'))) {
$member->set('section_id', $section_id);
}
$prerequisites = $member->prerequisites($this->course->offering()->gradebook());
if (!$this->course->offering()->access('manage') && !$prerequisites->hasMet('asset', $asset->get('id'))) {
$prereqs = $prerequisites->get('asset', $asset->get('id'));
$requirements = array();
foreach ($prereqs as $pre) {
$reqAsset = new Models\Asset($pre['scope_id']);
$requirements[] = $reqAsset->get('title');
}
$requirements = implode(', ', $requirements);
// Redirect back to the course outline
App::redirect(Route::url($this->course->offering()->link()), Lang::txt('COM_COURSES_ERROR_ASSET_HAS_PREREQ', $requirements), 'warning');
return;
}
// If requesting a file from a wiki type asset, then serve that up directly
if ($asset->get('subtype') == 'wiki' && Request::getVar('file', false)) {
echo $asset->download($this->course);
}
echo $asset->render($this->course);
}
