public static function ExtractCourse($data, $singleResult = false, $CourseExtension = '', $SheetExtension = '', $isResult = true)
{
// generates an assoc array of courses by using a defined list of
// its attributes
$courses = DBJson::getObjectsByAttributes($data, Course::getDBPrimaryKey(), Course::getDBConvert(), $CourseExtension);
// generates an assoc array of settings by using a defined list of
// its attributes
$settings = DBJson::getObjectsByAttributes($data, Setting::getDBPrimaryKey(), Setting::getDBConvert());
// generates an assoc array of exercise sheets by using a defined list of
// its attributes
$exerciseSheets = DBJson::getObjectsByAttributes($data, ExerciseSheet::getDBPrimaryKey(), array(ExerciseSheet::getDBPrimaryKey() => ExerciseSheet::getDBConvert()[ExerciseSheet::getDBPrimaryKey()]), $SheetExtension);
// concatenates the courses and the associated settings
$res = DBJson::concatObjectListResult($data, $courses, Course::getDBPrimaryKey(), Course::getDBConvert()['C_settings'], $settings, Setting::getDBPrimaryKey());
// concatenates the courses and the associated exercise sheet IDs
$res = DBJson::concatResultObjectListAsArray($data, $res, Course::getDBPrimaryKey(), Course::getDBConvert()['C_exerciseSheets'], $exerciseSheets, ExerciseSheet::getDBPrimaryKey(), $SheetExtension, $CourseExtension);
if ($isResult) {
$res = Course::decodeCourse($res, false);
if ($singleResult == true) {
// only one object as result
if (count($res) > 0) {
$res = $res[0];
}
}
}
return $res;
}
