/**
* Get all semesters that a course spans over.
*
* @param Seminar $course The course as a Seminar object
* @param String $selected Selected semester (can be updated)
*/
private function getSemestersForCourse(Seminar $course, &$selected)
{
// Step 1: Get all matching semesters
$semesters = array_filter(Semester::getAll(), function (Semester $semester) use($course) {
return $course->getStartSemester() <= $semester->vorles_beginn && $course->getEndSemesterVorlesEnde() >= $semester->vorles_ende;
});
// Step 2: Add option 'all' if more than one semester is found or if
// there is any date outside of the semester range. Otherwise, adjust
// the $selected variable
$temp = array();
if (count($semesters) > 1 || $course->hasDatesOutOfDuration(true)) {
$temp['all'] = _('Alle Semester');
} elseif (count($semesters) === 1) {
$semester = reset($semesters);
$selected = $semester->beginn;
}
// Step 3: Normalize semesters array (with option 'all' this needs
// to be in a pretty simple format)
$result = array();
foreach (array_reverse($semesters) as $semester) {
$temp[$semester->beginn] = $semester->name;
}
// Step 4: Create required result array from normalized array
$result = array();
foreach ($temp as $key => $val) {
$result[] = array('url' => '?cmd=applyFilter&newFilter=' . $key, 'value' => $key, 'linktext' => $val, 'is_selected' => $selected == $key);
}
return $result;
}