Merge mancala.js repo

mancala.js/.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+dist

mancala.js/.eslintrc

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+{
+    "root": true,
+    "parser": "@typescript-eslint/parser",
+    "plugins": [
+      "@typescript-eslint"
+    ],
+    "extends": [
+      "eslint:recommended",
+      "plugin:@typescript-eslint/eslint-recommended",
+      "plugin:@typescript-eslint/recommended"
+    ]
+  }

mancala.js/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+dist

mancala.js/.prettierrc

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+{
+  "semi": true,
+  "trailingComma": "none",
+  "singleQuote": true,
+  "printWidth": 80
+}

mancala.js/README.md

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+# mancala.js
+
+mancala.js is a javascript library for mancala game.

mancala.js/jest.config.js

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+module.exports = {
+  transform: {'^.+\\.ts?$': 'ts-jest'},
+  testEnvironment: 'node',
+  testRegex: '/tests/.*\\.(test|spec)?\\.(ts|tsx)$',
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']
+};

mancala.js/package.json

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+{
+  "name": "mancala.js",
+  "version": "0.0.2-beta.3",
+  "description": "Mancala game library",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "dev": "yarn tsc -w",
+    "test": "yarn jest",
+    "lint": "eslint . --ext .ts",
+    "prettier-format": "prettier --config .prettierrc 'src/**/*.ts' --write",
+    "build": "tsc",
+    "prepublish": "tsc"
+  },
+  "author": "Halit Aksoy",
+  "license": "MIT",
+  "devDependencies": {
+    "@types/jest": "^27.4.1",
+    "@typescript-eslint/eslint-plugin": "^5.21.0",
+    "@typescript-eslint/parser": "^5.21.0",
+    "eslint": "^8.14.0",
+    "jest": "^27.5.1",
+    "prettier": "^2.6.2",
+    "ts-jest": "^27.1.4",
+    "typescript": "^4.6.3"
+  }
+}

mancala.js/src/common/CommonBoard.ts

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+import { Board } from '../core/Board';
+
+const pitCountByUser = 6;
+const initialStoneCountInPit = 4;
+
+export class CommonBoard extends Board {
+  constructor() {
+    super(pitCountByUser, initialStoneCountInPit);
+  }
+}

mancala.js/src/common/CommonMancalaGame.ts

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+import { MancalaGame } from '../core/MancalaGame';
+import { CommonBoard } from './CommonBoard';
+import { GRClearBoardAtEnd } from './game_rules/GRClearBoardAtEnd';
+import { GRDoubleStoneInPit } from './game_rules/GRDoubleStoneInPit';
+import { GRLastStoneInBank } from './game_rules/GRLastStoneInBank';
+import { GRLastStoneInEmptyPit } from './game_rules/GRLastStoneInEmptyPit';
+
+export class CommonMancalaGame extends MancalaGame {
+  constructor(id: string, player1Id: string, player2Id: string) {
+    super(
+      id,
+      new CommonBoard(),
+      player1Id,
+      player2Id,
+      player1Id,
+      [
+        new GRLastStoneInEmptyPit(),
+        new GRDoubleStoneInPit(),
+        new GRLastStoneInBank(),
+        new GRClearBoardAtEnd()
+      ],
+      []
+    );
+  }
+}

mancala.js/src/common/game_rules/GRClearBoardAtEnd.ts

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+import { Board } from '../../core/Board';
+import { GameRule } from '../../core/GameRule';
+import { GameStep } from '../../core/HistoryItem';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export const GAME_STEP_BOARD_CLEARED = 'GAME_STEP_BOARD_CLEARED';
+
+export type ClearBoardAtEndData = { pitIndexesThatHasStone: number[] };
+
+export class GRClearBoardAtEnd implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    if (game.getPlayer1StoneCountInPits() === 0) {
+      const clearBoardAtEndData = {
+        pitIndexesThatHasStone: this.getPitIndexesThatHasStone(game.board)
+      };
+      game.board.player1Bank.stoneCount += game.getPlayer2StoneCountInPits();
+      game.board.clearPlayer2Pits();
+      this.addGameStep(game, index, clearBoardAtEndData);
+    } else if (game.getPlayer2StoneCountInPits() === 0) {
+      const clearBoardAtEndData = {
+        pitIndexesThatHasStone: this.getPitIndexesThatHasStone(game.board)
+      };
+      game.board.player2Bank.stoneCount += game.getPlayer1StoneCountInPits();
+      game.board.clearPlayer1Pits();
+      this.addGameStep(game, index, clearBoardAtEndData);
+    }
+  }
+
+  private getPitIndexesThatHasStone(board: Board): number[] {
+    let index = 0;
+    const indexList = [];
+    for (const stoneCount of board.getStoneArray()) {
+      if (stoneCount > 0 && board.checkPitTypeIsNormalPitByIndex(index)) {
+        indexList.push(index);
+      }
+      index++;
+    }
+    return indexList;
+  }
+
+  private addGameStep(
+    game: MancalaGame,
+    index: number,
+    clearBoardAtEndData: ClearBoardAtEndData
+  ) {
+    game.addGameStep(
+      new GameStep(index, GAME_STEP_BOARD_CLEARED, clearBoardAtEndData)
+    );
+  }
+}

mancala.js/src/common/game_rules/GRDoubleStoneInPit.ts

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+import { GameRule } from '../../core/GameRule';
+import { GameStep } from '../../core/HistoryItem';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export const GAME_STEP_DOUBLE_STONE_IN_PIT = 'GAME_STEP_DOUBLE_STONE_IN_PIT';
+
+export type DoubleStoneInPitData = { pitIndex: number; bankIndex: number };
+
+export class GRDoubleStoneInPit implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    index = game.board.getPitIndexCircularly(index);
+    const pit = game.board.pits[index];
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (pit.stoneCount % 2 === 0) {
+      if (pitType === 'player1Pit' && game.isTurnPlayer2()) {
+        const pitIndex = index;
+        const bankIndex = game.board.player2BankIndex();
+        game.board.player2Bank.stoneCount +=
+          game.board.getPitCircularly(pitIndex).stoneCount;
+        game.board.getPitCircularly(pitIndex).stoneCount = 0;
+        this.addGameStep(game, index, { pitIndex, bankIndex });
+      } else if (pitType === 'player2Pit' && game.isTurnPlayer1()) {
+        const pitIndex = index;
+        const bankIndex = game.board.player1BankIndex();
+        game.board.player1Bank.stoneCount +=
+          game.board.getPitCircularly(pitIndex).stoneCount;
+        game.board.getPitCircularly(pitIndex).stoneCount = 0;
+        this.addGameStep(game, index, { pitIndex, bankIndex });
+      }
+    }
+  }
+
+  private addGameStep(
+    game: MancalaGame,
+    index: number,
+    doubleStoneInPitData: DoubleStoneInPitData
+  ) {
+    game.addGameStep(
+      new GameStep(index, GAME_STEP_DOUBLE_STONE_IN_PIT, doubleStoneInPitData)
+    );
+  }
+}

mancala.js/src/common/game_rules/GRLastStoneInBank.ts

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+import { GameRule } from '../../core/GameRule';
+import { GameStep } from '../../core/HistoryItem';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export const GAME_STEP_LAST_STONE_IN_BANK = 'GAME_STEP_LAST_STONE_IN_BANK';
+
+export class GRLastStoneInBank implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    index = game.board.getPitIndexCircularly(index);
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (
+      (pitType === 'player1Bank' && game.isTurnPlayer1()) ||
+      (pitType === 'player2Bank' && game.isTurnPlayer2())
+    ) {
+      game.addGameStep(new GameStep(index, GAME_STEP_LAST_STONE_IN_BANK));
+    } else {
+      game.changePlayerTurn();
+    }
+  }
+}

mancala.js/src/common/game_rules/GRLastStoneInEmptyPit.ts

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+import { GameRule } from '../../core/GameRule';
+import { GameStep } from '../../core/HistoryItem';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export const GAME_STEP_LAST_STONE_IN_EMPTY_PIT =
+  'GAME_STEP_LAST_STONE_IN_EMPTY_PIT';
+
+export type LastStoneInEmptyPitData = { oppositeIndex: number };
+
+export class GRLastStoneInEmptyPit implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    index = game.board.getPitIndexCircularly(index);
+    const pit = game.board.pits[index];
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (pit.stoneCount === 1) {
+      if (pitType === 'player1Pit' && game.isTurnPlayer1()) {
+        const oppositeIndex = game.board.getOppositePitIndex(index);
+        const oppositePit = game.board.pits[oppositeIndex];
+        if (oppositePit.stoneCount > 0) {
+          const player1BankIndex =
+            game.board.pits[game.board.player1BankIndex()];
+          player1BankIndex.stoneCount += 1 + oppositePit.stoneCount;
+          oppositePit.stoneCount = 0;
+          pit.stoneCount = 0;
+          this.addGameStep(game, index, { oppositeIndex });
+        }
+      } else if (pitType === 'player2Pit' && game.isTurnPlayer2()) {
+        const oppositeIndex = game.board.getOppositePitIndex(index);
+        const oppositePit = game.board.pits[oppositeIndex];
+        if (oppositePit.stoneCount > 0) {
+          const player2BankIndex =
+            game.board.pits[game.board.player2BankIndex()];
+          player2BankIndex.stoneCount += 1 + oppositePit.stoneCount;
+          oppositePit.stoneCount = 0;
+          pit.stoneCount = 0;
+          this.addGameStep(game, index, { oppositeIndex });
+        }
+      }
+    }
+  }
+
+  private addGameStep(
+    game: MancalaGame,
+    index: number,
+    data: LastStoneInEmptyPitData
+  ) {
+    game.addGameStep(
+      new GameStep(index, GAME_STEP_LAST_STONE_IN_EMPTY_PIT, data)
+    );
+  }
+}

mancala.js/src/core/Board.ts

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+import { Bank, Pit } from './Pit';
+
+const bankCount = 2;
+
+export type PitType =
+  | 'player1Pit'
+  | 'player1Bank'
+  | 'player2Pit'
+  | 'player2Bank';
+
+export class Board {
+  pits: Pit[];
+  playerPitCount: number;
+  initialStoneCountInPits: number;
+
+  onGameMoveStart: (index: number) => void = () => {};
+  onGameMove: (index: number) => void = () => {};
+  onGameMoveEnd: (index: number) => void = () => {};
+
+  constructor(
+    playerPitCount: number,
+    initialStoneCountInPits: number,
+    pits: Pit[] | null = null
+  ) {
+    this.playerPitCount = playerPitCount;
+    this.initialStoneCountInPits = initialStoneCountInPits;
+    this.pits = pits
+      ? pits
+      : this.createPits(playerPitCount, initialStoneCountInPits);
+  }
+
+  createPits(playerPitCount: number, initialStoneCountInPits: number): Pit[] {
+    const totalPitCount = playerPitCount + playerPitCount + bankCount;
+    const pitArray = new Array<Pit>(totalPitCount);
+    for (let index = 0; index < this.totalPitCount(); index++) {
+      const pitType = this.getPitTypeByIndex(index);
+      if (pitType === 'player1Pit' || pitType === 'player2Pit') {
+        pitArray[index] = new Pit(index, initialStoneCountInPits);
+      } else if (pitType === 'player1Bank' || pitType === 'player2Bank') {
+        pitArray[index] = new Bank(index, 0);
+      }
+    }
+    return pitArray;
+  }
+
+  public player1PitStartIndex = () => 0;
+  public player1PitStopIndex = () =>
+    this.player1PitStartIndex() + this.playerPitCount - 1;
+  public player1BankIndex = () => this.player1PitStopIndex() + 1;
+  public player2PitStartIndex = () => this.player1BankIndex() + 1;
+  public player2PitStopIndex = () =>
+    this.player2PitStartIndex() + this.playerPitCount - 1;
+  public player2BankIndex = () => this.player2PitStopIndex() + 1;
+  public totalPitCount = () => this.player2BankIndex() + 1;
+
+  public checkIndex(index: number): boolean {
+    return (
+      index >= this.player1PitStartIndex() && index <= this.player2BankIndex()
+    );
+  }
+
+  checkIndeAndMaybeThrowError(index: number): void {
+    if (!this.checkIndex(index)) {
+      throw new Error(
+        `IndexOutOfRange => index : ${index} [start, stop] = [${this.player1PitStartIndex()}, ${this.player2BankIndex()}]`
+      );
+    }
+  }
+
+  public getPitTypeByIndex(index: number): PitType {
+    this.checkIndeAndMaybeThrowError(index);
+    if (
+      index >= this.player1PitStartIndex() &&
+      index <= this.player1PitStopIndex()
+    ) {
+      return 'player1Pit';
+    } else if (index === this.player1BankIndex()) {
+      return 'player1Bank';
+    } else if (index <= this.player2PitStopIndex()) {
+      return 'player2Pit';
+    } else {
+      return 'player2Bank';
+    }
+  }
+
+  public checkPitTypeIsNormalPitByIndex(index: number): boolean {
+    this.checkIndeAndMaybeThrowError(index);
+    const pitType = this.getPitTypeByIndex(index);
+    return pitType === 'player1Pit' || pitType === 'player2Pit';
+  }
+
+  public checkPitTypeIsBankByIndex(index: number): boolean {
+    this.checkIndeAndMaybeThrowError(index);
+    const pitType = this.getPitTypeByIndex(index);
+    return pitType === 'player1Bank' || pitType === 'player2Bank';
+  }
+
+  public move(index: number) {
+    this.checkIndeAndMaybeThrowError(index);
+    const pitType = this.getPitTypeByIndex(index);
+    if (pitType === 'player1Bank' || pitType === 'player2Bank') {
+      throw new Error(`InCorrectPit => index : ${index} pitType = ${pitType}`);
+    }
+    const pit = this.pits[index];
+    if (pit.stoneCount <= 0) {
+      throw new Error(
+        `StoneNotFound => index : ${index} stoneCount = ${pit.stoneCount}`
+      );
+    }
+    const stepCount = pit.stoneCount;
+    this.pits[index].stoneCount = 0;
+    const startIndex = stepCount === 1 ? index + 1 : index;
+    this.moveInternal(startIndex, stepCount);
+  }
+
+  private moveInternal(startIndex: number, stepCount: number) {
+    this.fireOnGameMoveStart(startIndex);
+    for (let i = startIndex; i < startIndex + stepCount; i++) {
+      this.onGameMoveStep(i);
+    }
+    const stopIndex = startIndex + stepCount - 1;
+    this.fireOnGameMoveEnd(stopIndex);
+  }
+
+  public onGameMoveStep(index: number) {
+    const pit = this.pits[this.getPitIndexCircularly(index)];
+    pit.increaseStone();
+    this.fireOnGameMove(index);
+  }
+
+  public getNextPitCircularly(currentPitIndex: number) {
+    return this.pits[this.getNextPitIndexCircularly(currentPitIndex)];
+  }
+
+  public getNextPitIndexCircularly(currentPitIndex: number) {
+    this.checkIndeAndMaybeThrowError(currentPitIndex);
+    return this.getPitIndexCircularly(currentPitIndex + 1);
+  }
+
+  public getPitCircularly(currentPitIndex: number) {
+    return this.pits[this.getPitIndexCircularly(currentPitIndex)];
+  }
+
+  public getPitIndexCircularly(currentPitIndex: number) {
+    return currentPitIndex % this.totalPitCount();
+  }
+
+  fireOnGameMoveStart(index: number): void {
+    this.onGameMoveStart(index);
+  }
+
+  fireOnGameMove(index: number): void {
+    this.onGameMove(index);
+  }
+
+  fireOnGameMoveEnd(index: number): void {
+    this.onGameMoveEnd(index);
+  }
+
+  public getStoneArray(): number[] {
+    return [...this.pits.map((pit) => pit.stoneCount)];
+  }
+
+  public get player1Pits(): Pit[] {
+    return this.pits.slice(
+      this.player1PitStartIndex(),
+      this.player1BankIndex()
+    );
+  }
+
+  get player2Pits(): Pit[] {
+    return this.pits.slice(
+      this.player2PitStartIndex(),
+      this.player2BankIndex()
+    );
+  }
+
+  get player1Bank(): Bank {
+    return this.pits[this.player1BankIndex()];
+  }
+
+  get player2Bank(): Bank {
+    return this.pits[this.player2BankIndex()];
+  }
+
+  public getOppositePitIndex(index: number) {
+    if (index > this.player1BankIndex()) {
+      return this.player2PitStopIndex() - index;
+    } else {
+      return this.player1BankIndex() + this.playerPitCount - index;
+    }
+  }
+
+  public clear() {
+    this.player1Bank.stoneCount = 0;
+    this.player2Bank.stoneCount = 0;
+    this.clearPlayer1Pits();
+    this.clearPlayer2Pits();
+  }
+
+  public clearPlayer1Pits() {
+    this.fillPlayer1Pits(0);
+  }
+
+  public clearPlayer2Pits() {
+    this.fillPlayer2Pits(0);
+  }
+
+  public fillPlayer1Pits(stoneCount: number) {
+    this.player1Pits.forEach((pit) => (pit.stoneCount = stoneCount));
+  }
+
+  public fillPlayer2Pits(stoneCount: number) {
+    this.player2Pits.forEach((pit) => (pit.stoneCount = stoneCount));
+  }
+}

mancala.js/src/core/GameRule.ts

@@ -0,0 +1,7 @@
+import { MancalaGame } from './MancalaGame';
+
+export interface GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void;
+  onGameMove(game: MancalaGame, index: number): void;
+  onGameMoveEnd(game: MancalaGame, index: number): void;
+}

mancala.js/src/core/HistoryItem.ts

@@ -0,0 +1,34 @@
+export class HistoryItem {
+  boardSnapshot: number[];
+  gameSteps: GameStep[];
+  constructor(boardSnapshot: number[], gameSteps: GameStep[]) {
+    this.boardSnapshot = boardSnapshot;
+    this.gameSteps = gameSteps;
+  }
+}
+
+export class MoveHistoryItem extends HistoryItem {
+  playerId: string;
+  moveIndex: number;
+  constructor(
+    playerId: string,
+    moveIndex: number,
+    boardSnapshot: number[],
+    gameSteps: GameStep[]
+  ) {
+    super(boardSnapshot, gameSteps);
+    this.playerId = playerId;
+    this.moveIndex = moveIndex;
+  }
+}
+
+export class GameStep {
+  index: number;
+  type: string;
+  data: any | null;
+  constructor(index: number, type: string, data: any = null) {
+    this.index = index;
+    this.type = type;
+    this.data = data;
+  }
+}

mancala.js/src/core/MancalaGame.ts

@@ -0,0 +1,239 @@
+import { Board, PitType } from './Board';
+import { GameRule } from './GameRule';
+import { HistoryItem, MoveHistoryItem, GameStep } from './HistoryItem';
+
+export type GameState = 'initial' | 'playing' | 'ended';
+
+export const GAME_STEP_GAME_MOVE = 'GAME_STEP_GAME_MOVE';
+
+export class MancalaGame {
+  id: string;
+  board: Board;
+  player1Id: string;
+  player2Id: string;
+  turnPlayerId: string;
+  state: GameState;
+  gameRules: GameRule[];
+  history: HistoryItem[];
+  currentHistoryItem: HistoryItem | null = null;
+
+  constructor(
+    id: string,
+    board: Board,
+    player1Id: string,
+    player2Id: string,
+    turnPlayerId: string,
+    gameRules: GameRule[],
+    history: HistoryItem[],
+    state: GameState = 'initial'
+  ) {
+    this.id = id;
+    this.board = board;
+    this.player1Id = player1Id;
+    this.player2Id = player2Id;
+    this.turnPlayerId = turnPlayerId;
+    this.state = state;
+    this.gameRules = gameRules;
+    this.history = history;
+    this.listenBoardMoveEvents();
+  }
+
+  listenBoardMoveEvents() {
+    this.board.onGameMoveStart = (index: number) => {
+      this.gameRules.forEach((gameRule) => {
+        gameRule.onGameMoveStart(this, index);
+      });
+    };
+    this.board.onGameMove = (index: number) => {
+      this.addGameStep(new GameStep(index, GAME_STEP_GAME_MOVE));
+      this.gameRules.forEach((gameRule) => {
+        gameRule.onGameMove(this, index);
+      });
+    };
+    this.board.onGameMoveEnd = (index: number) => {
+      this.gameRules.forEach((gameRule) => {
+        gameRule.onGameMoveEnd(this, index);
+      });
+    };
+  }
+
+  changePlayerTurn() {
+    if (this.turnPlayerId === this.player1Id) {
+      this.turnPlayerId = this.player2Id;
+    } else {
+      this.turnPlayerId = this.player1Id;
+    }
+  }
+
+  isTurnPlayer1() {
+    return this.player1Id === this.turnPlayerId;
+  }
+
+  isTurnPlayer2() {
+    return this.player2Id === this.turnPlayerId;
+  }
+
+  getPlayerIdByPitType(pitType: PitType): string {
+    if (pitType === 'player1Pit' || pitType === 'player1Bank') {
+      return this.player1Id;
+    } else if (pitType === 'player2Pit' || pitType === 'player2Bank') {
+      return this.player2Id;
+    } else {
+      throw new Error('Unknown pit type : ' + pitType);
+    }
+  }
+
+  getPlayerIdByIndex(index: number): string {
+    const pitType = this.board.getPitTypeByIndex(index);
+    return this.getPlayerIdByPitType(pitType);
+  }
+
+  checkIsPlayerTurnByIndex(index: number): boolean {
+    const playerId = this.getPlayerIdByIndex(index);
+    return this.checkIsPlayerTurn(playerId);
+  }
+
+  getBoardIndexByPlayerId(playerId: string, pitIndex: number) {
+    if (this.player1Id === playerId) {
+      return this.board.player1PitStartIndex() + pitIndex;
+    } else if (this.player2Id === playerId) {
+      return this.board.player2PitStartIndex() + pitIndex;
+    } else {
+      return -1; // throwing an error might be better
+    }
+  }
+
+  public checkIsPlayerTurn(playerId: string) {
+    return playerId === this.turnPlayerId;
+  }
+
+  public checkPitIndexForPlayerId(playerId: string, pitIndex: number) {
+    const foundPlayerId = this.getPlayerIdByIndex(
+      this.getBoardIndexByPlayerId(playerId, pitIndex)
+    );
+    return playerId === foundPlayerId;
+  }
+
+  public checkIsPitIndexBank(playerId: string, pitIndex: number) {
+    const pitType = this.board.getPitTypeByIndex(
+      this.getBoardIndexByPlayerId(playerId, pitIndex)
+    );
+    return pitType === 'player1Bank' || pitType === 'player2Bank';
+  }
+
+  public canPlayerMove(playerId: string, pitIndex: number) {
+    const isPitIndexCorrect = this.checkPitIndexForPlayerId(playerId, pitIndex);
+    const isPitIndexBank = this.checkIsPitIndexBank(playerId, pitIndex);
+    const isPlayerTurn = this.checkIsPlayerTurn(playerId);
+    return isPitIndexCorrect && !isPitIndexBank && isPlayerTurn;
+  }
+
+  public moveByPlayerPit(playerId: string, pitIndex: number) {
+    if (this.state === 'ended') return;
+    if (this.state === 'initial') {
+      this.state = 'playing';
+    }
+    if (this.canPlayerMove(playerId, pitIndex)) {
+      const moveIndex = this.getBoardIndexByPlayerId(playerId, pitIndex);
+      this.currentHistoryItem = new MoveHistoryItem(
+        playerId,
+        moveIndex,
+        [],
+        []
+      );
+      this.board.move(moveIndex);
+      this.currentHistoryItem.boardSnapshot = this.board.getStoneArray();
+      this.history.push(this.currentHistoryItem);
+      if (this.checkGameIsEnded()) {
+        this.state = 'ended';
+      }
+    } else {
+      const isPitIndexCorrect = this.checkPitIndexForPlayerId(
+        playerId,
+        pitIndex
+      );
+      const isPlayerTurn = this.checkIsPlayerTurn(playerId);
+      throw new Error(
+        `Player cannot move reason : isPitIndexCorrect = ${isPitIndexCorrect} isPlayerTurn = ${isPlayerTurn}`
+      );
+    }
+  }
+
+  getPlayer1StoneCountInPits(): number {
+    return this.getPlayerStoneCountInPits(
+      this.board.player1PitStartIndex(),
+      this.board.player1BankIndex()
+    );
+  }
+
+  getPlayer2StoneCountInPits(): number {
+    return this.getPlayerStoneCountInPits(
+      this.board.player2PitStartIndex(),
+      this.board.player2BankIndex()
+    );
+  }
+
+  getPlayerStoneCountInPits(
+    playerPitStartIndex: number,
+    playerBankIndex: number
+  ): number {
+    const player2Pits = this.board.pits.slice(
+      playerPitStartIndex,
+      playerBankIndex
+    );
+    return player2Pits
+      .map((pit) => pit.stoneCount)
+      .reduce(
+        (previousStoneCount, stoneCount) => previousStoneCount + stoneCount
+      );
+  }
+
+  public checkGameIsEnded(): boolean {
+    if (
+      this.getPlayer1StoneCountInPits() === 0 ||
+      this.getPlayer2StoneCountInPits() === 0
+    ) {
+      return true;
+    }
+    return false;
+  }
+
+  public getWonPlayerId(): string | undefined {
+    const player1StoneCount = this.board.player1Bank.stoneCount;
+    const player2StoneCount = this.board.player2Bank.stoneCount;
+    if (this.checkGameIsEnded()) {
+      if (player1StoneCount === player2StoneCount) {
+        return undefined;
+      } else if (player1StoneCount > player2StoneCount) {
+        return this.player1Id;
+      } else {
+        return this.player2Id;
+      }
+    }
+  }
+
+  public static createFromMancalaGame(mancalaGame: MancalaGame): MancalaGame {
+    return new MancalaGame(
+      mancalaGame.id,
+      new Board(
+        mancalaGame.board.playerPitCount,
+        mancalaGame.board.initialStoneCountInPits,
+        mancalaGame.board.pits
+      ),
+      mancalaGame.player1Id,
+      mancalaGame.player2Id,
+      mancalaGame.turnPlayerId,
+      mancalaGame.gameRules,
+      mancalaGame.history,
+      mancalaGame.state
+    );
+  }
+
+  public getCurrentHistoryItem(): HistoryItem | null {
+    return this.currentHistoryItem;
+  }
+
+  public addGameStep(gameStep: GameStep) {
+    this.getCurrentHistoryItem()?.gameSteps.push(gameStep);
+  }
+}

mancala.js/src/core/Pit.ts

@@ -0,0 +1,31 @@
+export class Pit {
+  index: number;
+  stoneCount: number;
+
+  constructor(index: number, stoneCount = 0) {
+    this.index = index;
+    this.stoneCount = stoneCount;
+  }
+
+  get isBank(): boolean {
+    return false;
+  }
+
+  public increaseStone(count = 1) {
+    this.stoneCount += count;
+  }
+
+  public decreaseStone(count = 1) {
+    this.stoneCount -= count;
+  }
+}
+
+export class Bank extends Pit {
+  constructor(index: number, stoneCount = 0) {
+    super(index, stoneCount);
+  }
+
+  override get isBank(): boolean {
+    return true;
+  }
+}

mancala.js/src/index.ts

@@ -0,0 +1,11 @@
+export * from './core/MancalaGame';
+export * from './core/Board';
+export * from './core/Pit';
+export * from './core/GameRule';
+export * from './core/HistoryItem';
+export * from './common/CommonBoard';
+export * from './common/CommonMancalaGame';
+export * from './common/game_rules/GRLastStoneInBank';
+export * from './common/game_rules/GRLastStoneInEmptyPit';
+export * from './common/game_rules/GRDoubleStoneInPit';
+export * from './common/game_rules/GRClearBoardAtEnd';

mancala.js/tests/Board.test.ts

@@ -0,0 +1,125 @@
+import { Board } from '../src/core/Board';
+
+describe('Board Test', () => {
+  test('test pit index', () => {
+    const board = new Board(6, 4);
+    expect(board.pits[0].index).toBe(0);
+    expect(board.pits[1].index).toBe(1);
+    expect(board.pits[2].index).toBe(2);
+    expect(board.pits[3].index).toBe(3);
+    expect(board.pits[4].index).toBe(4);
+    expect(board.pits[5].index).toBe(5);
+    expect(board.pits[6].index).toBe(6);
+    expect(board.pits[7].index).toBe(7);
+    expect(board.pits[8].index).toBe(8);
+    expect(board.pits[9].index).toBe(9);
+    expect(board.pits[10].index).toBe(10);
+    expect(board.pits[11].index).toBe(11);
+    expect(board.pits[12].index).toBe(12);
+    expect(board.pits[13].index).toBe(13);
+  });
+  test('test getPitTypeByIndex', () => {
+    const board = new Board(6, 4);
+    expect(board.getPitTypeByIndex(0)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(1)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(2)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(3)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(4)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(5)).toBe('player1Pit');
+    expect(board.getPitTypeByIndex(6)).toBe('player1Bank');
+    expect(board.getPitTypeByIndex(7)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(8)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(9)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(10)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(11)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(12)).toBe('player2Pit');
+    expect(board.getPitTypeByIndex(13)).toBe('player2Bank');
+    expect(() => board.getPitTypeByIndex(-1)).toThrowError();
+    expect(() => board.getPitTypeByIndex(14)).toThrowError();
+  });
+  test('test checkIndex', () => {
+    const board = new Board(6, 4);
+    expect(board.checkIndex(0)).toBe(true);
+    expect(board.checkIndex(1)).toBe(true);
+    expect(board.checkIndex(2)).toBe(true);
+    expect(board.checkIndex(4)).toBe(true);
+    expect(board.checkIndex(5)).toBe(true);
+    expect(board.checkIndex(6)).toBe(true);
+    expect(board.checkIndex(7)).toBe(true);
+    expect(board.checkIndex(8)).toBe(true);
+    expect(board.checkIndex(9)).toBe(true);
+    expect(board.checkIndex(10)).toBe(true);
+    expect(board.checkIndex(11)).toBe(true);
+    expect(board.checkIndex(12)).toBe(true);
+    expect(board.checkIndex(13)).toBe(true);
+    expect(board.checkIndex(14)).toBe(false);
+    expect(board.checkIndex(-1)).toBe(false);
+  });
+  test('test getPitIndexCircularly', () => {
+    const board = new Board(6, 4);
+    expect(board.getPitIndexCircularly(0)).toBe(0);
+    expect(board.getPitIndexCircularly(1)).toBe(1);
+    expect(board.getPitIndexCircularly(2)).toBe(2);
+    expect(board.getPitIndexCircularly(3)).toBe(3);
+    expect(board.getPitIndexCircularly(4)).toBe(4);
+    expect(board.getPitIndexCircularly(5)).toBe(5);
+    expect(board.getPitIndexCircularly(6)).toBe(6);
+    expect(board.getPitIndexCircularly(7)).toBe(7);
+    expect(board.getPitIndexCircularly(8)).toBe(8);
+    expect(board.getPitIndexCircularly(9)).toBe(9);
+    expect(board.getPitIndexCircularly(10)).toBe(10);
+    expect(board.getPitIndexCircularly(11)).toBe(11);
+    expect(board.getPitIndexCircularly(12)).toBe(12);
+    expect(board.getPitIndexCircularly(13)).toBe(13);
+    expect(board.getPitIndexCircularly(14)).toBe(0);
+    expect(board.getPitIndexCircularly(15)).toBe(1);
+    expect(board.getPitIndexCircularly(16)).toBe(2);
+  });
+  test('test move', () => {
+    const board = new Board(6, 4);
+    const initialBoard = [4, 4, 4, 4, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0];
+    expect(board.getStoneArray()).toStrictEqual(initialBoard);
+    board.move(0);
+    expect(board.getStoneArray()).toStrictEqual([
+      1, 5, 5, 5, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0
+    ]);
+    board.move(0);
+    expect(board.getStoneArray()).toStrictEqual([
+      0, 6, 5, 5, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0
+    ]);
+    board.move(1);
+    expect(board.getStoneArray()).toStrictEqual([
+      0, 1, 6, 6, 5, 5, 1, 4, 4, 4, 4, 4, 4, 0
+    ]);
+    board.move(5);
+    expect(board.getStoneArray()).toStrictEqual([
+      0, 1, 6, 6, 5, 1, 2, 5, 5, 5, 4, 4, 4, 0
+    ]);
+  });
+  test('test move 2', () => {
+    const board = new Board(6, 4);
+    board.pits[5].stoneCount = 15;
+    const initialBoard = [4, 4, 4, 4, 4, 15, 0, 4, 4, 4, 4, 4, 4, 0];
+    expect(board.getStoneArray()).toStrictEqual(initialBoard);
+    board.move(5);
+    expect(board.getStoneArray()).toStrictEqual([
+      5, 5, 5, 5, 5, 2, 1, 5, 5, 5, 5, 5, 5, 1
+    ]);
+  });
+
+  test('test getOppositePitIndex', () => {
+    const board = new Board(6, 4);
+    expect(board.getOppositePitIndex(0)).toBe(12);
+    expect(board.getOppositePitIndex(1)).toBe(11);
+    expect(board.getOppositePitIndex(2)).toBe(10);
+    expect(board.getOppositePitIndex(3)).toBe(9);
+    expect(board.getOppositePitIndex(4)).toBe(8);
+    expect(board.getOppositePitIndex(5)).toBe(7);
+    expect(board.getOppositePitIndex(7)).toBe(5);
+    expect(board.getOppositePitIndex(8)).toBe(4);
+    expect(board.getOppositePitIndex(9)).toBe(3);
+    expect(board.getOppositePitIndex(10)).toBe(2);
+    expect(board.getOppositePitIndex(11)).toBe(1);
+    expect(board.getOppositePitIndex(12)).toBe(0);
+  });
+});

mancala.js/tests/MancalaGame.test.ts

@@ -0,0 +1,176 @@
+import { GameStep, MoveHistoryItem } from '../src/core/HistoryItem';
+import { GAME_STEP_GAME_MOVE, MancalaGame } from '../src/core/MancalaGame';
+import { createGame } from './TestUtil';
+
+describe('Game Test', () => {
+  test('test getPlayerIdByIndex', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.getPlayerIdByIndex(0)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(1)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(2)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(3)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(4)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(5)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(6)).toStrictEqual(player1Id);
+    expect(game.getPlayerIdByIndex(7)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(8)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(9)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(10)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(11)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(12)).toStrictEqual(player2Id);
+    expect(game.getPlayerIdByIndex(13)).toStrictEqual(player2Id);
+  });
+  test('test canPlayerMove', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.canPlayerMove(player1Id, 0)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 1)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 2)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 3)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 4)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 5)).toBe(true);
+    expect(game.canPlayerMove(player1Id, 6)).toBe(false);
+    expect(game.canPlayerMove(player2Id, 0)).toBe(false);
+  });
+
+  test('test moveByPlayerPit', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.state).toBe('initial');
+    expect(game.turnPlayerId).toBe(player1Id);
+
+    game.moveByPlayerPit(player1Id, 0);
+    expect(game.state).toBe('playing');
+    expect(game.turnPlayerId).toBe(player2Id);
+
+    game.moveByPlayerPit(player2Id, 0);
+    expect(game.state).toBe('playing');
+    expect(game.turnPlayerId).toBe(player1Id);
+  });
+
+  test('test game end test', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.state).toBe('initial');
+    game.board.pits[0].stoneCount = 0;
+    game.board.pits[1].stoneCount = 0;
+    game.board.pits[2].stoneCount = 0;
+    game.board.pits[3].stoneCount = 0;
+    game.board.pits[4].stoneCount = 0;
+    game.board.pits[5].stoneCount = 1;
+    game.moveByPlayerPit(player1Id, 5);
+    expect(game.state).toBe('ended');
+  });
+
+  test('test last stone in bank', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.state).toBe('initial');
+    expect(game.turnPlayerId).toBe(player1Id);
+
+    game.moveByPlayerPit(player1Id, 3);
+    expect(game.state).toBe('playing');
+    expect(game.turnPlayerId).toBe(player1Id);
+  });
+
+  test('test empty pit 1', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    expect(game.state).toBe('initial');
+    game.board.pits[0].stoneCount = 1;
+    game.board.pits[1].stoneCount = 0;
+    game.moveByPlayerPit(player1Id, 0);
+    expect(game.state).toBe('playing');
+    expect(game.turnPlayerId).toBe(player2Id);
+    expect(game.board.getStoneArray()).toStrictEqual([
+      0, 0, 4, 4, 4, 4, 5, 4, 4, 4, 4, 0, 4, 0
+    ]);
+  });
+
+  test('test game history', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+    game.moveByPlayerPit(player1Id, 0);
+    game.moveByPlayerPit(player2Id, 0);
+    game.moveByPlayerPit(player1Id, 1);
+    game.moveByPlayerPit(player2Id, 1);
+    const historyItem1 = new MoveHistoryItem(
+      player1Id,
+      0,
+      [1, 5, 5, 5, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0],
+      [
+        new GameStep(0, GAME_STEP_GAME_MOVE),
+        new GameStep(1, GAME_STEP_GAME_MOVE),
+        new GameStep(2, GAME_STEP_GAME_MOVE),
+        new GameStep(3, GAME_STEP_GAME_MOVE)
+      ]
+    );
+    const historyItem2 = new MoveHistoryItem(
+      player2Id,
+      7,
+      [1, 5, 5, 5, 4, 4, 0, 1, 5, 5, 5, 4, 4, 0],
+      [
+        new GameStep(7, GAME_STEP_GAME_MOVE),
+        new GameStep(8, GAME_STEP_GAME_MOVE),
+        new GameStep(9, GAME_STEP_GAME_MOVE),
+        new GameStep(10, GAME_STEP_GAME_MOVE)
+      ]
+    );
+    const historyItem3 = new MoveHistoryItem(
+      player1Id,
+      1,
+      [1, 1, 6, 6, 5, 5, 0, 1, 5, 5, 5, 4, 4, 0],
+      [
+        new GameStep(1, GAME_STEP_GAME_MOVE),
+        new GameStep(2, GAME_STEP_GAME_MOVE),
+        new GameStep(3, GAME_STEP_GAME_MOVE),
+        new GameStep(4, GAME_STEP_GAME_MOVE),
+        new GameStep(5, GAME_STEP_GAME_MOVE)
+      ]
+    );
+    const historyItem4 = new MoveHistoryItem(
+      player2Id,
+      8,
+      [1, 1, 6, 6, 5, 5, 0, 1, 1, 6, 6, 5, 5, 0],
+      [
+        new GameStep(8, GAME_STEP_GAME_MOVE),
+        new GameStep(9, GAME_STEP_GAME_MOVE),
+        new GameStep(10, GAME_STEP_GAME_MOVE),
+        new GameStep(11, GAME_STEP_GAME_MOVE),
+        new GameStep(12, GAME_STEP_GAME_MOVE)
+      ]
+    );
+    expect(game.history[0]).toStrictEqual(historyItem1);
+    expect(game.history[1]).toStrictEqual(historyItem2);
+    expect(game.history[2]).toStrictEqual(historyItem3);
+    expect(game.history[3]).toStrictEqual(historyItem4);
+  });
+
+  test('test getWonPlayerId', () => {
+    const game = createGame();
+    const player1Id = '0';
+    const player2Id = '1';
+
+    game.board.clear();
+
+    game.board.pits[game.board.player1BankIndex()].stoneCount = 1;
+    game.board.pits[game.board.player2BankIndex()].stoneCount = 0;
+    expect(game.getWonPlayerId()).toBe(player1Id);
+
+    game.board.pits[game.board.player1BankIndex()].stoneCount = 0;
+    game.board.pits[game.board.player2BankIndex()].stoneCount = 1;
+    expect(game.getWonPlayerId()).toBe(player2Id);
+
+    game.board.pits[game.board.player1BankIndex()].stoneCount = 0;
+    game.board.pits[game.board.player2BankIndex()].stoneCount = 0;
+    expect(game.getWonPlayerId()).toBe(undefined);
+  });
+});

mancala.js/tests/TestUtil.ts

@@ -0,0 +1,27 @@
+import { GRClearBoardAtEnd } from '../src/common/game_rules/GRClearBoardAtEnd';
+import { GRLastStoneInBank } from '../src/common/game_rules/GRLastStoneInBank';
+import { GRLastStoneInEmptyPit } from '../src/common/game_rules/GRLastStoneInEmptyPit';
+import { GRDoubleStoneInPit } from '../src/common/game_rules/GRDoubleStoneInPit';
+import { Board } from '../src/core/Board';
+import { MancalaGame } from '../src/core/MancalaGame';
+
+export function createGame(): MancalaGame {
+  const board = new Board(6, 4);
+  const player1Id = '0';
+  const player2Id = '1';
+  const game = new MancalaGame(
+    '0',
+    board,
+    player1Id,
+    player2Id,
+    player1Id,
+    [
+      new GRLastStoneInEmptyPit(),
+      new GRDoubleStoneInPit(),
+      new GRLastStoneInBank(),
+      new GRClearBoardAtEnd()
+    ],
+    []
+  );
+  return game;
+}

mancala.js/tests/game_rules/GRClearBoardAtEnd.test.ts

@@ -0,0 +1,46 @@
+import {
+  GAME_STEP_LAST_STONE_IN_BANK,
+  GRLastStoneInBank
+} from '../../src/common/game_rules/GRLastStoneInBank';
+import {
+  GAME_STEP_LAST_STONE_IN_EMPTY_PIT,
+  GRLastStoneInEmptyPit
+} from '../../src/common/game_rules/GRLastStoneInEmptyPit';
+import {
+  GAME_STEP_BOARD_CLEARED,
+  GRClearBoardAtEnd
+} from '../../src/common/game_rules/GRClearBoardAtEnd';
+import { Board } from '../../src/core/Board';
+import { GAME_STEP_GAME_MOVE, MancalaGame } from '../../src/core/MancalaGame';
+import { GameStep } from '../../src/core/HistoryItem';
+import { createGame } from '../TestUtil';
+
+describe('GRClearBoardAtEnd Test', () => {
+  test('test GRClearBoardAtEnd 1', () => {
+    const game = createGame();
+    game.board.fillPlayer1Pits(0);
+    game.board.fillPlayer2Pits(0);
+    game.board.player1Pits[5].stoneCount = 1;
+    game.board.player2Pits[5].stoneCount = 1;
+    game.moveByPlayerPit('0', 5);
+    expect(game.board.player1Bank.stoneCount).toBe(2);
+    expect(game.board.player2Bank.stoneCount).toBe(0);
+    expect(
+      game.board.player1Pits
+        .map((pit) => pit.stoneCount)
+        .reduce((sum, stoneCount) => sum + stoneCount, 0)
+    ).toBe(0);
+    expect(
+      game.board.player2Pits
+        .map((pit) => pit.stoneCount)
+        .reduce((sum, stoneCount) => sum + stoneCount, 0)
+    ).toBe(0);
+    expect(game.history[0].gameSteps).toStrictEqual([
+      new GameStep(6, GAME_STEP_GAME_MOVE),
+      new GameStep(6, GAME_STEP_LAST_STONE_IN_BANK),
+      new GameStep(6, GAME_STEP_BOARD_CLEARED, {
+        pitIndexesThatHasStone: [12]
+      })
+    ]);
+  });
+});

mancala.js/tests/game_rules/GRDoubleStoneInPit.test.ts

@@ -0,0 +1,43 @@
+import { GameStep } from '../../src/core/HistoryItem';
+import { GAME_STEP_GAME_MOVE } from '../../src/core/MancalaGame';
+import { createGame } from '../TestUtil';
+import { GAME_STEP_DOUBLE_STONE_IN_PIT } from '../../src/common/game_rules/GRDoubleStoneInPit';
+
+describe('GRDoubleStoneInPit Test', () => {
+  test('test GRDoubleStoneInPit 1', () => {
+    const game = createGame();
+    const board = game.board;
+    const initialBoard = [3, 4, 4, 4, 4, 3, 0, 3, 4, 4, 4, 4, 3, 0];
+    game.board.pits[5].stoneCount = 3;
+    game.board.pits[7].stoneCount = 3;
+    game.board.pits[12].stoneCount = 3;
+    game.board.pits[0].stoneCount = 3;
+    expect(board.getStoneArray()).toStrictEqual(initialBoard);
+    game.moveByPlayerPit('0', 5);
+    expect(board.getStoneArray()).toStrictEqual([
+      3, 4, 4, 4, 4, 1, 5, 0, 4, 4, 4, 4, 3, 0
+    ]);
+    expect(game.history[0].gameSteps).toStrictEqual([
+      new GameStep(5, GAME_STEP_GAME_MOVE),
+      new GameStep(6, GAME_STEP_GAME_MOVE),
+      new GameStep(7, GAME_STEP_GAME_MOVE),
+      new GameStep(7, GAME_STEP_DOUBLE_STONE_IN_PIT, {
+        pitIndex: 7,
+        bankIndex: 6
+      })
+    ]);
+    game.moveByPlayerPit('1', 5);
+    expect(board.getStoneArray()).toStrictEqual([
+      0, 4, 4, 4, 4, 1, 5, 0, 4, 4, 4, 4, 1, 5
+    ]);
+    expect(game.history[game.history.length - 1].gameSteps).toStrictEqual([
+      new GameStep(12, GAME_STEP_GAME_MOVE),
+      new GameStep(13, GAME_STEP_GAME_MOVE),
+      new GameStep(14, GAME_STEP_GAME_MOVE),
+      new GameStep(0, GAME_STEP_DOUBLE_STONE_IN_PIT, {
+        pitIndex: 0,
+        bankIndex: 13
+      })
+    ]);
+  });
+});

mancala.js/tests/game_rules/GRLastStoneInEmptyPit.test.ts

@@ -0,0 +1,27 @@
+import { GAME_STEP_GAME_MOVE } from '../../src/core/MancalaGame';
+import { GameStep } from '../../src/core/HistoryItem';
+import { createGame } from '../TestUtil';
+import { GAME_STEP_LAST_STONE_IN_EMPTY_PIT } from '../../src/common/game_rules/GRLastStoneInEmptyPit';
+
+describe('GRClearBoardAtEnd Test', () => {
+  test('test GRClearBoardAtEnd 1', () => {
+    const game = createGame();
+    const board = game.board;
+    const initialBoard = [4, 4, 4, 4, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0];
+    expect(board.getStoneArray()).toStrictEqual(initialBoard);
+    game.board.player1Pits[0].stoneCount = 1;
+    game.board.player1Pits[1].stoneCount = 0;
+    expect(board.getStoneArray()).toStrictEqual([
+      1, 0, 4, 4, 4, 4, 0, 4, 4, 4, 4, 4, 4, 0
+    ]);
+    game.moveByPlayerPit('0', 0);
+    expect(board.getStoneArray()).toStrictEqual([
+      0, 0, 4, 4, 4, 4, 5, 4, 4, 4, 4, 0, 4, 0
+    ]);
+
+    expect(game.history[0].gameSteps).toStrictEqual([
+      new GameStep(1, GAME_STEP_GAME_MOVE),
+      new GameStep(1, GAME_STEP_LAST_STONE_IN_EMPTY_PIT, { oppositeIndex: 11 })
+    ]);
+  });
+});

mancala.js/tsconfig.json

@@ -0,0 +1,110 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Projects */
+    // "incremental": true,                              /* Enable incremental compilation */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./",                          /* Specify the folder for .tsbuildinfo incremental compilation files. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+
+    /* Language and Environment */
+    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    // "jsx": "preserve",                                /* Specify what JSX code is generated. */
+    // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */
+    // "reactNamespace": "",                             /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */
+    // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+
+    /* Modules */
+    "module": "commonjs",                                /* Specify what module code is generated. */
+    // "rootDir": "./",                                  /* Specify the root folder within your source files. */
+    // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
+    // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "typeRoots": [],                                  /* Specify multiple folders that act like `./node_modules/@types`. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files */
+    // "noResolve": true,                                /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */
+
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */
+
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
+    "outDir": "dist",                                   /* Specify an output folder for all emitted files. */
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    //"sourceRoot": "src",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have `@internal` in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like `__extends` in compiled output. */
+    // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing `const enum` declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
+
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
+
+    /* Type Checking */
+    "strict": true,                                      /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied `any` type.. */
+    // "strictNullChecks": true,                         /* When type checking, take into account `null` and `undefined`. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "noImplicitThis": true,                           /* Enable error reporting when `this` is given the type `any`. */
+    // "useUnknownInCatchVariables": true,               /* Type catch clause variables as 'unknown' instead of 'any'. */
+    // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
+    // "noUnusedLocals": true,                           /* Enable error reporting when a local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
+    // "noUncheckedIndexedAccess": true,                 /* Include 'undefined' in index signature results */
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+
+    /* Completeness */
+    // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true,                                /* Skip type checking all .d.ts files. */
+    "declaration": true
+  },
+  "include": [
+    "src"
+  ],
+  "exclude": [
+    "node_modules",
+    "**/__tests__/*",
+    "dist"
+  ]
+}