From 08f42adc2681d428f6c479a8cc09999a8fb53125 Mon Sep 17 00:00:00 2001
From: Jeroen De Meerleer <me@jeroened.be>
Date: Thu, 30 May 2019 08:33:52 +0200
Subject: [PATCH] Implemented Aro Cut 1

---
 src/Tiebreaks.php  | 10 ++++++----
 src/Tournament.php |  3 +++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/Tiebreaks.php b/src/Tiebreaks.php
index 1670315..424ce83 100644
--- a/src/Tiebreaks.php
+++ b/src/Tiebreaks.php
@@ -141,20 +141,22 @@ abstract class Tiebreaks extends Tournament
      * @param Player $player
      * @return float
      */
-    protected function calculateAverageRating(Player $player)
+    protected function calculateAverageRating(Player $player, int $cut = 0)
     {
         $pairings = $player->getPairings();
         $totalrating = 0;
         $totalopponents = 0;
+        $allratings = [];
         foreach ($pairings as $pairing) {
             if (array_search($pairing->getResult(), self::NotPlayed) === false) {
                 $toadd = $pairing->getOpponent()->getElos()['home'];
                 if ($toadd != 0) {
-                    $totalrating += $toadd;
-                    $totalopponents++;
+                    $allratings[] = $toadd;
                 }
             }
         }
-        return round($totalrating / $totalopponents);
+        sort($allratings);
+        $allratings = array_slice($allratings, $cut);
+        return round(array_sum($allratings) / count($allratings));
     }
 }
diff --git a/src/Tournament.php b/src/Tournament.php
index cd08fa7..09e1107 100644
--- a/src/Tournament.php
+++ b/src/Tournament.php
@@ -293,6 +293,9 @@ class Tournament extends Tiebreaks
             case Tiebreak::Aro:
                 return $this->calculateAverageRating($player);
                 break;
+            case Tiebreak::AroCut:
+                return $this->calculateAverageRating($player, 1);
+                break;
             default:
                 return null;
         }