From 0efd0a2baaa11fb43d2952304e940642f379754b Mon Sep 17 00:00:00 2001
From: Jeroen De Meerleer <me@jeroened.be>
Date: Thu, 30 May 2019 21:30:28 +0200
Subject: [PATCH] Added average performance tiebreak

---
 src/Tiebreaks.php  | 25 +++++++++++++++++++++++++
 src/Tournament.php |  3 +++
 2 files changed, 28 insertions(+)

diff --git a/src/Tiebreaks.php b/src/Tiebreaks.php
index 652b789..efdb580 100644
--- a/src/Tiebreaks.php
+++ b/src/Tiebreaks.php
@@ -122,8 +122,10 @@ abstract class Tiebreaks extends Tournament
         return $points;
     }
 
+
     /**
      * @param Player $player
+     * @param int $cut
      * @return float
      */
     protected function calculateAverageRating(Player $player, int $cut = 0)
@@ -145,6 +147,29 @@ abstract class Tiebreaks extends Tournament
         return round(array_sum($allratings) / count($allratings));
     }
 
+
+    /**
+     * @param Player $player
+     * @param int $cut
+     * @return float
+     */
+    protected function calculateAveragePerformance(Player $player, int $cut = 0)
+    {
+        $pairings = $player->getPairings();
+        $allratings = [];
+        foreach ($pairings as $pairing) {
+            if (array_search($pairing->getResult(), Constants::NotPlayed) === false) {
+                $toadd = $pairing->getOpponent()->getPerformance();
+                if ($toadd != 0) {
+                    $allratings[] = $toadd;
+                }
+            }
+        }
+        sort($allratings);
+        $allratings = array_slice($allratings, $cut);
+        return round(array_sum($allratings) / count($allratings));
+    }
+
     /**
      * @param Player $player
      * @param int $cut
diff --git a/src/Tournament.php b/src/Tournament.php
index 9841ec8..9d45bf7 100644
--- a/src/Tournament.php
+++ b/src/Tournament.php
@@ -317,6 +317,9 @@ class Tournament extends Tiebreaks
             case Tiebreak::Cumulative:
                 return $this->calculateCumulative($player);
                 break;
+            case Tiebreak::Performance:
+                return $this->calculateAveragePerformance($player);
+                break;
             default:
                 return null;
         }