public static function parse_sorter($text)
{
// parse the sorter
$text = simplify_whitespace($text);
if (preg_match('/\\A(\\d+)([a-z]*)\\z/i', $text, $m) || preg_match('/\\A([^-,+#]+)[,+#]([a-z]*)\\z/i', $text, $m)) {
$sort = new ListSorter($m[1]);
foreach (str_split(strtoupper($m[2])) as $x) {
if ($x === "R" || $x === "N") {
$sort->reverse = $x === "R";
} else {
if ($x === "M") {
$sort->score = "C";
} else {
if (isset(self::$score_sorts[$x])) {
$sort->score = $x;
}
}
}
}
} else {
$sort = PaperSearch::parse_sorter($text);
}
if ($sort->score === null) {
$sort->score = self::default_score_sort();
}
return $sort;
}
