'Only an admin can change a calendar.']);
exit;
}
$calendar_id = intval($_GET['id'] ?? 0);
$calendar = calendarList()[$calendar_id] ?? null;
if (!$calendar) {
echo json_encode(['error' => 'That calendar no longer exists.']);
exit;
}
// The colour picker takes #rrggbb only - an old named colour shows as its shade
$color = calendarColor($calendar['calendar_color'], '#3c8dbc');
if (strlen($color) === 4) {
$color = '#' . $color[1] . $color[1] . $color[2] . $color[2] . $color[3] . $color[3];
}
ob_start();
?>