Add newrelic transaction attributes

cmd/server/end.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/bethanyj28/battlesnek/internal"
+	"github.com/newrelic/go-agent/v3/newrelic"
 	"github.com/sirupsen/logrus"
 )
 
@@ -21,10 +22,25 @@ func (s *server) handleEnd() http.HandlerFunc {
 			return
 		}
 
+		if txn := newrelic.FromContext(r.Context()); nil != txn {
+			txn.AddAttribute("won", didSnakeWin(state.Board.Snakes, state.You))
+			txn.AddAttribute("turns", state.Turn)
+			txn.AddAttribute("game_id", state.Game.ID)
+		}
+
 		s.logger.WithFields(logrus.Fields{
 			"game_state": fmt.Sprintf("%+v", state),
 		}).Info("END")
 
 		w.WriteHeader(http.StatusOK)
 	}
 }
+
+func didSnakeWin(remainingSnakes []internal.Battlesnake, you internal.Battlesnake) bool {
+	for _, snake := range remainingSnakes {
+		if snake.ID == you.ID {
+			return true
+		}
+	}
+	return false
+}