/**
* Initialize lesson
*
* This function is used to initialize specific aspects of the current lesson
* These aspects can be the lesson content, announcements, users, glossary etc
* specified in the $deleteEntities array.
* <br/>Example:
* <code>
* try {
* $lesson = new EfrontLesson(32); //32 is the lesson id
* $lesson -> initialize(array('content', 'glossary', 'rules')); //Erase all content, glossary terms and content rules
* } catch (Exception $e) {
* echo $e -> getMessage();
* }
* </code><br/>
* If $deleteEntities is 'all', then all lesson aspects are reset
*
* @param mixed $deleteEntities Eiterh an array with lesson aspects to initialize, or 'all' which equals to 'reset everything'
* @return boolean True if everything is ok
* @since 3.5.0
* @access public
*/
public function initialize($deleteEntities)
{
$possibleEntities = array('content', 'tests', 'questions', 'rules', 'conditions', 'comments', 'users', 'news', 'files', 'calendar', 'glossary', 'tracking', 'scheduling', 'surveys', 'events', 'modules', 'projects');
if ($deleteEntities == 'all') {
$deleteEntities = $possibleEntities;
}
$content = eF_getTableDataFlat("content", "*", "lessons_ID=" . $this->lesson['id']);
//Get the lesson units
sizeof($content['id']) > 0 ? $content_list = implode(",", $content['id']) : ($content_list = array());
//Create list of content ids, will come in handy later
$commonFolderLessons = eF_getTableData("lessons", "id", "share_folder=" . $this->lesson['id']);
foreach ($deleteEntities as $value) {
switch ($value) {
case 'tests':
$lessonTests = $this->getTests(true);
foreach ($lessonTests as $id => $test) {
$test->delete();
}
break;
case 'questions':
$lessonQuestions = $this->getQuestions(true);
foreach ($lessonQuestions as $id => $question) {
$question->delete();
}
break;
case 'rules':
$content = new EfrontContentTree($this->lesson['id']);
$contentRules = $content->getRules();
$content->deleteRules(array_keys($contentRules));
break;
case 'conditions':
$lessonConditions = $this->getConditions();
$this->deleteConditions(array_keys($lessonConditions));
break;
case 'comments':
$content = new EfrontContentTree($this->lesson['id']);
$content->deleteComments(array_keys($content->getComments()));
//Delete all comments
break;
case 'content':
$content = new EfrontContentTree($this->lesson['id']);
foreach (new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($content->tree), RecursiveIteratorIterator::SELF_FIRST)) as $key => $unit) {
$unit->delete();
}
break;
case 'users':
$lessonUsers = $this->getUsers('student');
$this->removeUsers(array_keys($lessonUsers));
break;
case 'news':
$lessonNews = news::getNews($this->lesson['id']);
//$this -> getNews();
foreach ($lessonNews as $value) {
$value = new news($value);
$value->delete();
}
break;
case 'files':
//Only delete files if this lesson is not sharing its folder
if (!$this->lesson['share_folder'] && empty($commonFolderLessons)) {
$directory = new EfrontDirectory($this->directory);
$directory->delete();
mkdir($this->directory, 0755);
}
break;
case 'calendar':
!in_array('calendar', $deleteEntities) or calendar::deleteLessonCalendarEvents($this->lesson['id']);
break;
case 'glossary':
in_array('glossary', $deleteEntities) ? eF_deleteTableData("glossary", "lessons_ID=" . $this->lesson['id']) : null;
break;
case 'projects':
$lessonProjects = $this->getProjects(true);
foreach ($lessonProjects as $value) {
$value->delete();
}
break;
case 'tracking':
$tracking_info = array("done_content" => "", "issued_certificate" => "", "comments" => "", "completed" => 0, "current_unit" => 0, "score" => 0);
eF_updateTableData("users_to_lessons", $tracking_info, "lessons_ID = " . $this->lesson['id']);
/*
foreach ($this -> getUsers as $user => $foo) {
$cacheKey = "user_lesson_status:lesson:".$this -> lesson['id']."user:"******"completed_tests", "tests_ID={$id}");
}
$units = $this->getUnits();
if (sizeof($units) > 0) {
eF_deleteTableData("scorm_data", "content_ID in (" . implode(",", $units) . ")");
}
break;
case 'scheduling':
$this->lesson['from_timestamp'] = null;
$this->lesson['to_timestamp'] = null;
$this->persist();
break;
case 'surveys':
$surveys = eF_getTableDataFlat("surveys", "id", "lessons_ID=" . $this->lesson['id']);
$surveys_list = implode(",", $surveys['id']);
if (!empty($surveys_list)) {
eF_deleteTableData("questions_to_surveys", "surveys_ID IN ({$surveys_list})");
eF_deleteTableData("survey_questions_done", "surveys_ID IN ({$surveys_list})");
eF_deleteTableData("users_to_surveys", "surveys_ID IN ({$surveys_list})");
eF_deleteTableData("users_to_done_surveys", "surveys_ID IN ({$surveys_list})");
eF_deleteTableData("surveys", "lessons_ID=" . $this->lesson['id']);
}
break;
case 'events':
eF_deleteTableData("events", "lessons_ID=" . $this->lesson['id']);
break;
case 'modules':
$modules = eF_loadAllModules();
foreach ($modules as $module) {
$module->onDeleteLesson($this->lesson['id']);
}
break;
}
EfrontCache::getInstance()->deleteCache();
}
/*
if (in_array('questions', $deleteEntities)) { //Delete lesson questions
$result = eF_getTableData("questions", "id", "lessons_ID=".$this -> lesson['id']);
foreach ($result as $value) {
$questionIds[] = $value['id'];
}
if (sizeof($questionIds) > 0) {
eF_deleteTableData("tests_to_questions", "questions_ID in (".implode(",", $questionIds).")");
}
eF_deleteTableData("questions", "lessons_ID=".$this -> lesson['id']);
}
if (in_array('content', $deleteEntities)) { //Delete lesson units
foreach ($content['id'] as $value) {
$value = new EfrontUnit($value);
$value -> delete();
}
$result = eF_getTableDataFlat("content", "id", "lessons_ID=".$this -> lesson['id']);
$list = implode(",", $result['id']);
EfrontSearch :: removeText('content', $list, '', true);
eF_deleteTableData("content", "lessons_ID=".$this -> lesson['id']); //Just make sure everything is deleted
}
if (in_array('surveys', $deleteEntities)) {
$surveys = eF_getTableDataFlat("surveys", "id", "lessons_ID=".$this -> lesson['id']);
$surveys_list = implode(",", $surveys['id']);
eF_deleteTableData("questions_to_surveys", "surveys_ID IN ($surveys_list)");
eF_deleteTableData("survey_questions_done", "surveys_ID IN ($surveys_list)");
eF_deleteTableData("users_to_surveys", "surveys_ID IN ($surveys_list)");
eF_deleteTableData("users_to_done_surveys", "surveys_ID IN ($surveys_list)");
eF_deleteTableData("surveys", "lessons_ID=".$this -> lesson['id']);
}
if (in_array('tracking', $deleteEntities)) {
$tracking_info = array("done_content" => "",
"issued_certificate" => "",
"comments" => "",
"completed" => 0,
"current_unit" => 0,
"score" => 0);
eF_updateTableData("users_to_lessons", $tracking_info, "lessons_ID = ".$this -> lesson['id']);
}
if (in_array('files', $deleteEntities)) {
$filesystem = new FileSystemTree($this -> getDirectory());
foreach (new ArrayIterator($filesystem -> tree) as $key => $value) {
$value -> delete();
}
}
in_array('conditions', $deleteEntities) ? eF_deleteTableData("lesson_conditions", "lessons_ID=".$this -> lesson['id']) : null;
in_array('calendar', $deleteEntities) ? eF_deleteTableData("calendar", "lessons_ID=".$this -> lesson['id']) : null;
in_array('periods', $deleteEntities) ? eF_deleteTableData("periods", "lessons_ID=".$this -> lesson['id']) : null;
in_array('news', $deleteEntities) ? eF_deleteTableData("news", "lessons_ID=".$this -> lesson['id']) : null;
in_array('glossary', $deleteEntities) ? eF_deleteTableData("glossary", "lessons_ID=".$this -> lesson['id']) : null;
in_array('users', $deleteEntities) ? eF_deleteTableData("users_to_lessons", "lessons_ID=".$this -> lesson['id']." and user_type = 'student'") : null;
in_array('comments', $deleteEntities) ? eF_deleteTableData("comments", "content_ID IN (".$content_list.")") : null;
in_array('rules', $deleteEntities) ? eF_deleteTableData("rules", "content_ID IN (".$content_list.") or rule_content_ID IN (".$content_list.")") : null;
$done_tests = eF_getTableDataFlat("done_tests", "id", "tests_ID IN ($content_list)");
sizeof($done_tests) > 0 ? eF_deleteTableData("done_questions", "done_tests_ID IN (".implode(",", $done_tests['id']).")") : null;
eF_deleteTableData("done_tests", "tests_ID IN ($content_list)");
eF_deleteTableData("users_to_done_tests", "tests_ID IN ($content_list)");
eF_deleteTableData("logs", "action='test_begin' AND comments IN ($content_list)");
*/
}
