+/**
+ * Implements a sensible ranking system described in
+ * https://stackoverflow.com/a/1411268/2826013
+ */
+function calculateRank(array $games)
+{
+ $averageRatings = array_map(
+ function ($game) {
+ return $game->rating->average;
+ },
+ $games
+ );
+ $average = array_sum($averageRatings) / count($averageRatings);
+ $C = $average;
+ $m = 500;
+
+ foreach ($games as $game) {
+ $R = $game->rating->average;
+ $v = $game->rating->count;
+ $game->rating->rank = ($R * $v + $C * $m) / ($v + $m);
+ }
+}
+