ng new simple-game --createApplication=false 
ng generate application mine-sweeper

ng new mine-sweeper

// model.ts

export enum GameState {
 BEGINNING = 0x00,
 PLAYING = 0x01,
 WIN = 0x02,
 LOST = 0x03,
}

export interface IMineBlock {
 // 当前块是否是的内部是地雷
 readonly isMine: boolean;
 // 附近地雷块的数量
 readonly nearestMinesCount: number;
 // 是否已经被点开
 readonly isFound: boolean;
}

ng generate service mine-sweeper

export class MineSweeperService {

 private readonly _mineBlocks = new BehaviorSubject<IMineBlock[]>([]);

 private readonly _side = new BehaviorSubject(10);

 private readonly _state = new BehaviorSubject<GameState>(GameState.BEGINNING);

 private readonly _mineCount = new BehaviorSubject<number>(10);

 readonly side$ = this._side.asObservable();

 readonly mineBlock$ = this._mineBlocks.asObservable();

 readonly state$ = this._state.asObservable();

 readonly mineCount$ = this._mineCount.asObservable();

 get side() { return this._side.value; }

 set side(value: number) { this._side.next(value); }

 get mineBlocks() { return this._mineBlocks.value; }

 get state() { return this._state.value; }

 get mineCount() { return this._mineCount.value; }

 //...
}

port class MineSweeperService {
 // ...
 
 start() {
  this._mineBlocks.next(this.createMineBlocks(this.side));
  this._state.next(GameState.BEGINNING);
 }

 doNext(index: number): boolean {
  switch (this.state) {
   case GameState.LOST:
   case GameState.WIN:
    return false;

   case GameState.BEGINNING:
    this.prepare(index);
    this._state.next(GameState.PLAYING);
    break;

   case GameState.PLAYING:
    if (this.testIsMine(index)) {
     this._state.next(GameState.LOST);
    }
    break;

   default:
    break;
  }
  if (this.vitoryVerify()) {
   this._state.next(GameState.WIN);
  }

  return true;
 }
 
 // ...
}

export class MineSweeperService {
 private prepare(index: number) {
  const blocks = [...this._mineBlocks.value];
  // 判断index是否越界了
  if (!blocks[index]) {
   throw Error('Out of index.');
  }
  // 将索引位置的块设置为已经打开的状态。
  blocks[index] = { isMine: false, isFound: true, nearestMinesCount: 0 };

  // 生成随机数数组，其中的随机数不包含 index。
  const numbers = this.generateRandomNumbers(this.mineCount, this.mineBlocks.length, index);
  // 通过随机数数组，设置指定的块为雷。
  for (const num of numbers) {
   blocks[num] = { isMine: true, isFound: false, nearestMinesCount: 0 };
  }

  // 使用横纵坐标遍历所有的地雷块
  // 这样做使得我们可以直接通过对坐标的增减来检测当前块附近雷的数量。
  const side = this.side;
  for (let i = 0; i < side; i++) {
   for (let j = 0; j < side; j++) {
    const index = transform(i, j);
    const block = blocks[index];
    // 如果当前块是雷，那么不进行检测
    if (block.isMine) {
     continue;
    }

    // 进行地雷块的附近的雷的数量检测，形如这样
    // x 1 o
    // 1 1 o
    // o o o
    //
    let nearestMinesCount = 0;
    for (let x = -1; x <= 1; x++) {
     for (let y = -1; y <= 1; y++) {
      nearestMinesCount += this.getMineCount(blocks[transform(i + x, j + y)]);
     }
    }
    // 对附近的地雷的数量进行更新
    blocks[index] = { ...block, nearestMinesCount };
   }
  }

  // 如果点击的位置附近的地雷数量是 0，则需要遍历附近所有的块，直到所有打开的块附近的地雷数量不为零。
  if (blocks[index].nearestMinesCount === 0) {
   this.cleanZeroCountBlock(blocks, index, this.transformToIndex(this.side));
  }

  // 触发更新
  this._mineBlocks.next(blocks);
 }
}

private testIsMine(index: number): boolean {
 const blocks = [...this._mineBlocks.value];
 if (!blocks[index]) {
  throw Error('Out of index.');
 }

 // 当前块为设打开状态
 const theBlock = { ...blocks[index], isFound: true };
 blocks[index] = theBlock;

 // 如果当前块是地雷，则找出所有是地雷的地雷块，将其状态设置为打开状态。
 // 或者如果点击的位置附近的地雷数量是 0，则需要遍历附近所有的块，直到所有打开的块附近的地雷数量不为零。
 if (theBlock.isMine) {
  for (let i = 0; i < blocks.length; i++) {
   if (blocks[i].isMine) {
    blocks[i] = { ...blocks[i], isFound: true };
   }
  }
 } else if (!theBlock.nearestMinesCount) {
  this.cleanZeroCountBlock(blocks, index);
 }

 // 触发更新
 this._mineBlocks.next(blocks);

 // 返回判定结果
 return theBlock.isMine;
}

 private vitoryVerify() {
  // 对当前地雷块数组进行 reduce 查找。
  return this.mineBlocks.reduce((prev, current) => {
   return !current.isMine && current.isFound "htmlcode">

private cleanZeroCountBlock(blocks: IMineBlock[], index: number) {
 const i = index % this.side;
 const j = Math.floor(index / this.side);
 // 对其附近的8个块进行检测
 for (let x = -1; x <= 1; x++) {
  for (let y = -1; y <= 1; y++) {
   const currentIndex = this.transformToIndex(i + x, j + y);
   const block = blocks[currentIndex];
   // 不为原始块，且块存在，且未打开，且不是地雷
   if (currentIndex === index || !block || block.isFound || block.isMine) {
    continue;
   }
   // 将其设为打开状态
   blocks[currentIndex] = { ...block, isFound: true };

   // 递归查询
   if (blocks[currentIndex].nearestMinesCount === 0) {
    this.cleanZeroCountBlock(blocks, currentIndex);
   }
  }
 }
}


到这里，我们基本已经编写完扫雷的具体逻辑。其他相关函数，可以查阅源码，不再赘述。
实现页面
到了这一步，其实就已经完成了大部分的工作，我们根据响应式对象编写组件，然后给dom对象添加点击事件，并触发相关的逻辑函数，之后再做各种的错误处理等等。页面代码就不贴在这里，在Github上可以查看源码。
源码以及参考


最后，如果有写得不好或者存在错误的地方，欢迎提出批评和修改建议，感谢您的阅读。
Mine Sweeper 源码
Angular 官方文档
Rxjs 官方文档