added won player and lastIndex overflow bug

src/mancala.ts

@@ -65,6 +65,7 @@ export class Game {
                 eachHole.ballCount++
             }
         })
+        
         hole.ballCount = holeEndBallCount
         console.log((stopIndex));
         console.log(checkIsOwnHole(stopIndex, circleSize));
@@ -73,7 +74,7 @@ export class Game {
             //check if it was 0 before
             if (stopHole.ballCount == 1) {
                 const ownStore = getOwnStore(circle)
-                const opponentHole = getOpponentHoleByIndex(stopIndex, circle)
+                const opponentHole = getOpponentHoleByIndex(stopIndex%16, circle)
 
                 if (opponentHole.ballCount > 0) {
                     ownStore.ballCount++
@@ -125,9 +126,31 @@ export class Game {
         }
     }
 
+    //todo throw expection
+    public getPlayerKeyByName(key: "player1" | "player2"): string {
+        if (this.player1 == key) {
+            return "player1"
+        } else {
+            return "player2"
+        }
+    }
+
     public checkGameTurn(user: string): boolean {
         return this.getPlayerNameByKey(user) == this.turn
     }
+
+    public getWonPlayer() : string | undefined {
+        const player1BallCount = this.board.player1Store.ballCount
+        const player2BallCount = this.board.player2Store.ballCount
+
+        if(player1BallCount < player2BallCount){
+            return this.getPlayerKeyByName("player1")
+        }else if(player1BallCount > player2BallCount) {
+            return this.getPlayerKeyByName("player2")
+        }else{
+            return undefined
+        }
+    }
 }
 
 export function createGame(player1: string, player2: string) {
@@ -182,6 +205,14 @@ export class Board {
     public player2Circle(): Array<Hole> {
         return [...this.player2Holes, this.player2Store, ...this.player1Holes, this.player1Store]
     }
+
+    public getBallCount(holes : Array<Hole> ) : number {
+        let ballCount = 0
+        for (let hole of holes) {
+            ballCount += hole.ballCount;
+        }
+        return ballCount
+    }
 }
 
 function iterateHoles(holes: Array<Hole>, start: number, stop: number, callback: (hole: Hole, index: number) => void) {

tests/mancala.test.ts

@@ -33,4 +33,18 @@ describe('mancala', function () {
     expect(game.board.player1Holes[game.board.player1Holes.length / 2].ballCount).toBe(0)
     expect(game.state).toBe("ended")
   })
+
+  it('game end won user 1', function () {
+    const board = new Board(
+      [new Hole(0), new Hole(0), new Hole(0), new Hole(0), new Hole(4), new Hole(4)],
+      [new Hole(0), new Hole(0), new Hole(0), new Hole(0), new Hole(0), new Hole(1)],
+      new Store(0), new Store(0))
+    const game = new Game(player1, player2, board, "player2", "playing")
+    game.moveByIndex(5, "player2")
+    expect(game.turn).toBe("player2")
+    expect(game.board.player2Store.ballCount).toBe(9)
+    expect(game.board.player1Holes[game.board.player1Holes.length / 2].ballCount).toBe(0)
+    expect(game.state).toBe("ended")
+    expect(game.getWonPlayer()).toBe("player2")
+  })
 })