<?php
namespace Courseware;
use User;
/**
* Courseware's structural elements.
*
* @author Marcus Eibrink-Lunzenauer <lunzenauer@elan-ev.de>
* @author Till Glöggler <gloeggler@elan-ev.de>
* @author Ron Lucke <lucke@elan-ev.de>
* @license GPL2 or any later version
*
* @since Stud.IP 5.0
*
* @property int $id database column
* @property int $parent_id database column
* @property int $is_link database column
* @property int $target_id database column
* @property string $range_id database column
* @property string $range_type database column
* @property string $owner_id database column
* @property string $editor_id database column
* @property string $edit_blocker_id database column
* @property int $position database column
* @property string $title database column
* @property string $image_id database column
* @property string $purpose database column
* @property \JSONArrayObject $payload database column
* @property int $public database column
* @property string $release_date database column
* @property string $withdraw_date database column
* @property \JSONArrayObject $read_approval database column
* @property \JSONArrayObject $write_approval database column
* @property \JSONArrayObject $copy_approval database column
* @property \JSONArrayObject $external_relations database column
* @property int $mkdate database column
* @property int $chdate database column
* @property \SimpleORMapCollection $children has_many Courseware\StructuralElement
* @property \SimpleORMapCollection $containers has_many Courseware\Container
* @property ?\Courseware\StructuralElement $parent belongs_to Courseware\StructuralElement
* @property \User $user belongs_to User
* @property \Course $course belongs_to Course
* @property \User $owner belongs_to User
* @property \User $editor belongs_to User
* @property ?\User $edit_blocker belongs_to User
* @property ?\FileRef $image has_one FileRef
* @property ?\Courseware\Task $task has_one Courseware\Task
* @property \SimpleORMapCollection $comments has_many Courseware\StructuralElementComment
* @property \SimpleORMapCollection $feedback has_many Courseware\StructuralElementFeedback
*
* @SuppressWarnings(PHPMD.TooManyPublicMethods)
* @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
*/
class StructuralElement extends \SimpleORMap
{
protected static function configure($config = [])
{
$config['db_table'] = 'cw_structural_elements';
$config['serialized_fields']['payload'] = 'JSONArrayObject';
$config['serialized_fields']['read_approval'] = 'JSONArrayObject';
$config['serialized_fields']['write_approval'] = 'JSONArrayObject';
$config['serialized_fields']['copy_approval'] = 'JSONArrayObject';
$config['serialized_fields']['external_relations'] = 'JSONArrayObject';
$config['has_many']['children'] = [
'class_name' => StructuralElement::class,
'assoc_foreign_key' => 'parent_id',
'on_delete' => 'delete',
'on_store' => 'store',
'order_by' => 'ORDER BY position',
];
$config['has_many']['containers'] = [
'class_name' => Container::class,
'assoc_foreign_key' => 'structural_element_id',
'on_delete' => 'delete',
'on_store' => 'store',
'order_by' => 'ORDER BY position',
];
$config['has_one']['task'] = [
'class_name' => Task::class,
'assoc_foreign_key' => 'structural_element_id',
'on_delete' => 'delete',
];
$config['belongs_to']['parent'] = [
'class_name' => StructuralElement::class,
'foreign_key' => 'parent_id',
];
$config['belongs_to']['user'] = [
'class_name' => \User::class,
'foreign_key' => 'range_id',
'assoc_foreign_key' => 'user_id',
];
$config['belongs_to']['course'] = [
'class_name' => \Course::class,
'foreign_key' => 'range_id',
'assoc_foreign_key' => 'seminar_id',
];
$config['belongs_to']['owner'] = [
'class_name' => User::class,
'foreign_key' => 'owner_id',
];
$config['belongs_to']['editor'] = [
'class_name' => User::class,
'foreign_key' => 'editor_id',
];
$config['belongs_to']['edit_blocker'] = [
'class_name' => User::class,
'foreign_key' => 'edit_blocker_id',
];
$config['has_one']['image'] = [
'class_name' => \FileRef::class,
'foreign_key' => 'image_id',
'on_delete' => 'delete',
'on_store' => 'store',
];
$config['has_many']['comments'] = [
'class_name' => StructuralElementComment::class,
'assoc_foreign_key' => 'structural_element_id',
'on_delete' => 'delete',
'on_store' => 'store',
'order_by' => 'ORDER BY chdate',
];
$config['has_many']['feedback'] = [
'class_name' => StructuralElementFeedback::class,
'assoc_foreign_key' => 'structural_element_id',
'on_delete' => 'delete',
'on_store' => 'store',
'order_by' => 'ORDER BY chdate',
];
parent::configure($config);
}
/**
* Returns the root element of a courseware instance for a user.
*
* @param string $userId the user's id to return the root element for
*
* @return ?StructuralElement null, if there is none, the root StructuralElement if there is one
*/
public static function getCoursewareUser(string $userId): ?StructuralElement
{
return self::getCourseware($userId, 'user');
}
/**
* Returns the root element of a courseware instance for a course.
*
* @param string $courseId the course's id to return the root element for
*
* @return ?StructuralElement null, if there is none, the root StructuralElement if there is one
*/
public static function getCoursewareCourse(string $courseId): ?StructuralElement
{
return self::getCourseware($courseId, 'course');
}
public static function getSharedCoursewareUser(string $root_id): ?StructuralElement
{
return self::getCourseware('', '', $root_id);
}
private static function getCourseware(string $rangeId, string $rangeType, string $root_id = null): ?StructuralElement
{
if ($root_id) {
$result = self::find($root_id);
} else {
$result = self::findOneBySQL(
'range_id = ?
AND range_type = ? AND parent_id IS NULL',
[$rangeId, $rangeType]
);
}
return $result;
}
/**
* Returns the ID of the associated range.
*
* @return string the id of the range
*/
public function getRangeId(): string
{
return $this->range_id;
}
/**
* @return bool true, if this object is the root of a courseware, false otherwise
*/
public function isRootNode(): bool
{
return null === $this->parent_id;
}
/**
* @return bool true, if this object purpose is task, false otherwise
*/
public function isTask(): bool
{
return $this->purpose === 'task';
}
/**
* @param User $user the user to validate
*
* @return bool true if the user may edit this instance
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
public function canEdit($user): bool
{
if ($GLOBALS['perm']->have_perm('root', $user->id)) {
return true;
}
switch ($this->range_type) {
case 'user':
if ($this->range_id === $user->id) {
return true;
}
return $this->hasWriteApproval($user);
case 'course':
$hasEditingPermission = $this->hasEditingPermission($user);
if ($this->isTask()) {
$task = $this->task;
if (!$task) {
$task = $this->findParentTask();
if (!$task) {
return false;
}
}
if ($hasEditingPermission) {
return false;
}
if ($task->isSubmitted()) {
return false;
}
return $task->userIsASolver($user);
}
if ($hasEditingPermission) {
return true;
}
return $this->hasWriteApproval($user);
default:
throw new \InvalidArgumentException('Unknown range type.');
}
}
/**
* @param mixed $user the user to validate
*
* @return bool true if the user may read this instance
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
public function canRead($user): bool
{
// root darf immer
if ($GLOBALS['perm']->have_perm('root', $user->id)) {
return true;
}
switch ($this->range_type) {
case 'user':
if ($this->range_id === $user->id) {
return true;
}
return $this->hasReadApproval($user);
$link = StructuralElement::findOneBySQL('target_id = ?', [$this->id]);
if ($link) {
return true;
}
return false;
case 'course':
if (!$GLOBALS['perm']->have_studip_perm('user', $this->range_id, $user->id)) {
return false;
}
if ($this->canEdit($user)) {
return true;
}
if (!$this->releasedForReaders($this)) {
return false;
}
return $this->hasReadApproval($user);
default:
throw new \InvalidArgumentException('Unknown range type.');
}
}
public function canVisit($user): bool
{
// root darf immer
if ($GLOBALS['perm']->have_perm('root', $user->id)) {
return true;
}
switch ($this->range_type) {
case 'user':
if ($this->range_id === $user->id) {
return true;
}
return $this->hasReadApproval($user);
case 'course':
if (!$GLOBALS['perm']->have_studip_perm('user', $this->range_id, $user->id)) {
return false;
}
if ($this->isTask()) {
$task = $this->task;
if (!$task) {
$task = $this->findParentTask();
if (!$task) {
return false;
}
}
if ($task->isSubmitted() && $this->hasEditingPermission($user)) {
return true;
}
return $task->userIsASolver($user);
}
if ($this->canEdit($user)) {
return true;
}
if (!$this->releasedForReaders($this)) {
return false;
}
return $this->hasReadApproval($user) && $this->canReadSequential($user);
default:
throw new \InvalidArgumentException('Unknown range type.');
}
}
/**
* @param \User|\Seminar_User $user
*/
public function hasEditingPermission($user): bool
{
return $GLOBALS['perm']->have_perm('root', $user->id)
|| $GLOBALS['perm']->have_studip_perm(
\CourseConfig::get($this->range_id)->COURSEWARE_EDITING_PERMISSION[$this->getCoursewareCourse($this->range_id)->id] ?? 'tutor',
$this->range_id,
$user->id
);
}
private function hasReadApproval($user): bool
{
// this property is shared between all range types.
if ($this->read_approval['all']) {
return true;
}
// now we also check against the perms for contents.
if ($this->range_type === 'user') {
return $this->hasUserReadApproval($user);
} else {
if (!count($this->read_approval)) {
return true;
}
// find user in users
$users = $this->read_approval['users'];
foreach ($users as $approvedUserId) {
if ($approvedUserId === $user->id) {
return true;
}
}
// find user in groups
$groups = $this->read_approval['groups'];
foreach ($groups as $groupId) {
/** @var ?\Statusgruppen $group */
$group = \Statusgruppen::find($groupId);
if ($group && $group->isMember($user->id)) {
return true;
}
}
}
return false;
}
private function hasUserReadApproval($user): bool
{
if (!count($this->read_approval)) {
if ($this->isRootNode()) {
return false;
}
return $this->parent->hasUserReadApproval($user);
}
// find user in users
$users = $this->read_approval['users'];
foreach ($users as $listedUserPerm) {
// now for contents, there is an expiry date defined.
if (!empty($listedUserPerm['expiry']) && strtotime($listedUserPerm['expiry']) < strtotime('today')) {
if ($this->isRootNode()) {
return false;
}
return $this->parent->hasUserReadApproval($user);
}
// In order to have a record of the users in the perms list of contents,
// we keep a full perm record in read_approval column, and set read property to true or false,
// this won't apply to write_approval column.
if ($listedUserPerm['id'] == $user->id && $listedUserPerm['read'] == true) {
return true;
}
}
//User not found.
return false;
}
private function hasWriteApproval($user): bool
{
// this property is shared between all range types.
if ($this->write_approval['all']) {
return true;
}
// now we also check against the perms for contents.
if ($this->range_type === 'user') {
return $this->hasUserWriteApproval($user);
} else {
if (!count($this->write_approval)) {
return false;
}
if ($this->write_approval['all']) {
return true;
}
// find user in users
$users = $this->write_approval['users']->getArrayCopy();
if (in_array($user->id, $users)) {
return true;
}
// find user in groups
foreach (\Statusgruppen::findMany($this->write_approval['groups']->getArrayCopy()) as $group) {
if ($group->isMember($user->id)) {
return true;
}
}
}
return false;
}
private function hasUserWriteApproval($user): bool
{
if (!count($this->write_approval)) {
if ($this->isRootNode()) {
return false;
}
return $this->parent->hasUserWriteApproval($user);
}
// find user in users
$users = $this->write_approval['users'];
foreach ($users as $listedUserPerm) {
// now for contents, there is an expiry date defined.
if (!empty($listedUserPerm['expiry']) && strtotime($listedUserPerm['expiry']) < strtotime('today')) {
if ($this->isRootNode()) {
return false;
}
return $this->parent->hasUserWriteApproval($user);
}
if ($listedUserPerm['id'] == $user->id) {
return true;
}
}
if ($this->isRootNode()) {
return false;
}
return $this->parent->hasUserWriteApproval($user);
}
/**
* @param mixed $user the user to validate
*
* @return bool true if the user may read this instance in sequential progression
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
private function canReadSequential($user): bool
{
$unit = $this->findUnit();
if (!$unit->config['sequential_progression']) {
return true;
}
return $this->previousProgressAchieved($user);
}
/**
* @return bool true if the user may read this instance in time interval
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
private function releasedForReaders(StructuralElement $element): bool
{
$released = false;
if (!$element->release_date || $element->release_date <= time()) {
$released = true;
}
if ($element->withdraw_date && $element->withdraw_date <= time()) {
$released = false;
}
$parent_released = true;
if (!$element->isRootNode()) {
$parent_released = $this->releasedForReaders($element->parent);
}
return $released && $parent_released;
}
/**
* @param mixed $user the user to validate
*
* @return bool true if the user has achieved previous elements
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
private function previousProgressAchieved($user): bool
{
$elements = $this->findCoursewareElements($user);
foreach ($elements as $element) {
// found me in depth-first order
// so everything before me was fine and we're done
if ($element->id == $this->id) {
break;
}
if (!$element->hasBeenAchieved($user)) {
return false;
}
}
return true;
}
private function findCoursewareElements($user): array
{
$root = $this->getCourseware($this->range_id, $this->range_type);
$elements = array_merge([$root], $root->findDescendants($user));
return $elements;
}
private function hasBeenAchieved($user): bool
{
foreach ($this->containers as $container) {
foreach ($container->blocks as $block) {
/** @var ?UserProgress $progress */
$progress = UserProgress::findOneBySQL('user_id = ? and block_id = ?', [$user->id, $block->id]);
if (!$progress || $progress->grade != 1) {
return false;
}
}
}
return true;
}
/**
* Returns all projects of a user and a given purpose.
*
* @param string $userId the ID of the user
* @param string $purpose a string containing the purpose of the projects
*
* @return StructuralElement[] a list of projects
*/
public static function findProjects(string $userId, string $purpose = 'all'): array
{
$root = self::getCoursewareUser($userId);
if ('all' == $purpose) {
return self::findBySQL('range_id = ? AND parent_id = ? ORDER BY position ASC', [$userId, $root->id]);
} else {
return self::findBySQL('range_id = ? AND parent_id = ? AND purpose = ? ORDER BY position ASC', [
$userId,
$root->id,
$purpose,
]);
}
}
/**
* Return the number of children of this instance.
*
* @return int the number of children
*/
public function countChildren(): int
{
return self::countBySQL('parent_id= ? ', [$this->id]);
}
/**
* Returns the list of all ancestors traversing up to the root.
*
* @return array a list of all ancestors of this instance up to the root
*/
public function findAncestors(): array
{
$ancestors = [];
if ($this->parent) {
$ancestors[] = $this->parent;
$ancestors = array_merge($this->parent->findAncestors(), $ancestors);
}
return $ancestors;
}
public function findUnit()
{
if ($this->isRootNode()) {
$root = $this;
} else {
$root = $this->findAncestors()[0];
}
return Unit::findOneBySQL('structural_element_id = ?', [$root->id]);
}
/**
* Returns the list of all descendants of this instance in depth-first search order.
*
* @param ?User $user the user whose bookmarked structural elements will be returned
*
* @return StructuralElement[] a list of all descendants
*/
public function findDescendants(User $user = null)
{
$descendants = [];
foreach ($this->children as $child) {
if ($user === null || $child->canRead($user)) {
$descendants[] = $child;
$descendants = array_merge($descendants, $child->findDescendants($user));
}
}
return $descendants;
}
/**
* Creates a new and empty courseware instance for a given range.
*
* @param string $rangeId the ID of the range
* @param string $rangeType the type of the range
*
* @return Instance the created courseware instance
*
* @SuppressWarnings(PHPMD.Superglobals)
*/
public static function createEmptyCourseware(string $rangeId, string $rangeType): Instance
{
if ('user' == $rangeType) {
$user = \User::find($rangeId);
} else {
/** @var ?\Course $course */
$course = \Course::find($rangeId);
/** @var ?\User $user */
$user = \User::find($GLOBALS['user']->id); //must be dozent
if ('dozent' != $course->getParticipantStatus($user->id)) {
$coursemembers = $course->getMembersWithStatus('dozent'); //get studip perm
$user = $coursemembers[0]->user;
}
}
$struct = self::build([
'parent_id' => null,
'range_id' => $rangeId,
'range_type' => $rangeType,
'owner_id' => $user->id,
'editor_id' => $user->id,
'title' => _('neue Seite'),
]);
$struct->store();
return new Instance($struct);
}
/**
* Counts and returns the number of containers in this structural element.
*
* @return int the number of containers of this structural element
*/
public function countContainers(): int
{
return Container::countBySql('structural_element_id = ?', [$this->id]);
}
/**
* Returns all structural elements that a user bookmarked in a range.
*
* @param User $user the user whose bookmarked structural elements will be returned
* @param \Range $range the range in which the user bookmarked structural elements
*
* @return array a list of bookmarked structural elements
*/
public static function findUsersBookmarksByRange(User $user, \Range $range): array
{
if (!in_array($range->getRangeType(), ['course', 'user'])) {
throw new \InvalidArgumentException();
}
$sql = <<<'SQL'
SELECT s.* FROM cw_structural_elements s
JOIN cw_bookmarks b
ON s.id = b.element_id
WHERE s.range_id = ? AND s.range_type = ? AND b.user_id = ?
ORDER BY b.chdate DESC
SQL;
$params = [$range->getRangeId(), $range->getRangeType(), $user->id];
return \DBManager::get()->fetchAll($sql, $params, StructuralElement::class . '::buildExisting');
}
/**
* Returns the URL of the image associated to this structural element.
*
* @return string the image URL, if it exists; an empty string otherwise
*/
public function getImageUrl()
{
return $this->image ? $this->image->getDownloadURL() : null;
}
/**
* Copies this instance into another course oder users contents.
*
* @param User $user this user will be the owner of the copy
* @param Range $parent the target where to copy this instance
*
* @return StructuralElement the copy of this instance
*/
public function copyToRange(User $user, string $rangeId, string $rangeType, string $purpose = ''): StructuralElement
{
$element = self::build([
'parent_id' => null,
'range_id' => $rangeId,
'range_type' => $rangeType,
'owner_id' => $user->id,
'editor_id' => $user->id,
'edit_blocker_id' => null,
'title' => $this->title,
'purpose' => $purpose ?: $this->purpose,
'position' => 0,
'payload' => $this->payload,
]);
$element->store();
$file_ref_id = $this->copyImage($user, $element);
$element->image_id = $file_ref_id;
$element->store();
$this->copyContainers($user, $element);
$this->copyChildren($user, $element, $purpose);
return $element;
}
/**
* Copies this instance as a child into another structural element.
*
* @param User $user this user will be the owner of the copy
* @param StructuralElement $parent the target where to copy this instance
*
* @return StructuralElement the copy of this instance
*/
public function copy(User $user, StructuralElement $parent, string $purpose = ''): StructuralElement
{
$ancestorIds = array_column($parent->findAncestors(), 'id');
$ancestorIds[] = $parent->id;
if (in_array($this->id, $ancestorIds)) {
throw new \InvalidArgumentException('Cannot copy into descendants.');
}
$file_ref_id = $this->copyImage($user, $parent);
$element = self::build([
'parent_id' => $parent->id,
'range_id' => $parent->range_id,
'range_type' => $parent->range_type,
'owner_id' => $user->id,
'editor_id' => $user->id,
'edit_blocker_id' => null,
'title' => $this->title,
'purpose' => empty($purpose) ? $this->purpose : $purpose,
'position' => $parent->countChildren(),
'payload' => $this->payload,
'image_id' => $file_ref_id,
'read_approval' => $parent->read_approval,
'write_approval' => $parent->write_approval
]);
$element->store();
$this->copyContainers($user, $element);
$this->copyChildren($user, $element, $purpose);
return $element;
}
private function copyImage(User $user, StructuralElement $parent) : ?string
{
$file_ref_id = null;
/** @var ?\FileRef $original_file_ref */
$original_file_ref = \FileRef::find($this->image_id);
if ($original_file_ref) {
$instance = new Instance($this->getCourseware($parent->range_id, $parent->range_type));
$folder = \Courseware\Filesystem\PublicFolder::findOrCreateTopFolder($instance);
/** @var \FileRef $file_ref */
$file_ref = \FileManager::copyFile($original_file_ref->getFileType(), $folder, $user);
$file_ref_id = $file_ref->id;
}
return $file_ref_id;
}
public function merge(User $user, StructuralElement $target): StructuralElement
{
// merge with target
if (!$target->image_id) {
$target->image_id = $this->copyImage($user, $target);
}
if ($target->title === 'neue Seite' || $target->title === 'New page') {
$target->title = $this->title;
}
if (!$target->purpose) {
$target->purpose = $this->purpose;
}
if (!$target->payload['color']) {
$target->payload['color'] = $this->payload['color'];
}
if (!$target->payload['description']) {
$target->payload['description'] = $this->payload['description'];
}
if (!$target->payload['license_type']) {
$target->payload['license_type'] = $this->payload['license_type'];
}
if (!$target->payload['required_time']) {
$target->payload['required_time'] = $this->payload['required_time'];
}
if (!$target->payload['difficulty_start']) {
$target->payload['difficulty_start'] = $this->payload['difficulty_start'];
}
if (!$target->payload['difficulty_end']) {
$target->payload['difficulty_end'] = $this->payload['difficulty_end'];
}
$target->store();
// add Containers to target
$this->copyContainers($user, $target);
// copy Children
$this->copyChildren($user, $target);
return $this;
}
private function copyContainers(User $user, StructuralElement $newElement): void
{
foreach ($this->containers as $container) {
$container->copy($user, $newElement);
}
}
private function copyChildren(User $user, StructuralElement $newElement, string $purpose = ''): void
{
foreach ($this->children as $child) {
$child->copy($user, $newElement, $purpose);
}
}
public function link(User $user, StructuralElement $parent): StructuralElement
{
$element = self::build([
'parent_id' => $parent->id,
'is_link' => 1,
'target_id' => $this->id,
'range_id' => $parent->range_id,
'range_type' => $parent->range_type,
'owner_id' => $user->id,
'editor_id' => $user->id,
'edit_blocker_id' => null,
'title' => $this->title,
'purpose' => $this->purpose,
'position' => $parent->countChildren(),
'payload' => $this->payload,
'read_approval' => $parent->read_approval,
'write_approval' => $parent->write_approval
]);
$element->store();
$this->linkChildren($user, $element);
return $element;
}
private function linkChildren(User $user, StructuralElement $newElement): void
{
$children = self::findBySQL('parent_id = ?', [$this->id]);
foreach ($children as $child) {
$child->link($user, $newElement);
}
}
public function pdfExport($user, bool $with_children = false)
{
$doc = new \ExportPDF('P', 'mm', 'A4', true, 'UTF-8', false);
$doc->setHeaderTitle(_('Courseware'));
if ($this->course) {
$doc->setHeaderTitle(sprintf(_('Courseware aus %s'), $this->course->name));
}
if ($this->user) {
$doc->setHeaderTitle(sprintf(_('Courseware von %s'), $this->user->getFullname()));
}
if (!self::canVisit($user)) {
$doc->addPage();
$doc->addContent(_('Diese Seite steht Ihnen nicht zur Verfügung!'));
return $doc;
}
$this->getElementPdfExport(0, $with_children, $user, $doc);
if ($with_children) {
$doc->addTOCPage();
$doc->SetFont('helvetica', 'B', 16);
$doc->MultiCell(0, 0, _('Inhaltsverzeichnis'), 0, 'C', 0, 1, '', '', true, 0);
$doc->Ln();
$doc->SetFont('helvetica', '', 12);
$doc->addTOC(1, 'helvetica', '.', _('Inhaltsverzeichnis'), 'B', array(0,0,0));
$doc->endTOCPage();
}
return $doc;
}
private function getElementPdfExport(int $depth, bool $with_children, $user, $doc)
{
if (!$this->canVisit($user)) {
return '';
}
$doc->addPage();
$doc->Bookmark(htmlReady($this->title), $depth, 0, '', '', array(128,0,0));
$html = "<h1>" . htmlReady($this->title) . "</h1>";
$html .= $this->getContainerPdfExport();
$doc->writeHTML($html);
if ($with_children) {
$this->getChildrenPdfExport($depth, $with_children, $user, $doc);
}
}
private function getChildrenPdfExport(int $depth, bool $with_children, $user, $doc)
{
$children = self::findBySQL('parent_id = ?', [$this->id]);
$depth++;
foreach ($children as $child) {
$child->getElementPdfExport($depth, $with_children, $user, $doc);
}
}
private function getContainerPdfExport()
{
$containers = \Courseware\Container::findBySQL('structural_element_id = ?', [$this->id]);
$html = '';
foreach ($containers as $container) {
$container_html_template = $container->type->getPdfHtmlTemplate();
$html .= $container_html_template ? $container_html_template->render() : '';
}
return $html;
}
private function findParentTask()
{
if ($this->isRootNode()) {
return null;
}
if ($this->task) {
return $this->task;
}
return $this->parent->findParentTask();
}
}