지뢰찾기

mine.js

const UNREVEALED_MINE = "M";
const UNREVEALED_EMPTY = "E";
const REVEALED_BLANK = "B";
const REVEALED_MINE = "X";

const adjacentIndexes = [
  [-1, -1],
  [-1, 0],
  [-1, 1],
  [1, 1],
  [1, 0],
  [1, -1],
  [0, -1],
  [0, 1],
];

const getAdjacentMineCount = (board, [row, column]) => {
  let count = 0;
  for (const [plusRow, plusColumn] of adjacentIndexes) {
    const adjacentRow = row + plusRow
    const adjacentColumn = column + plusColumn
    if (
      board?.[adjacentRow]?.[adjacentColumn] === UNREVEALED_MINE
    ) {
      count++;
    }
  }

  return count;
};

const resolveEmpty = (board, [row, column]) => {
  const adjacentMineCount = getAdjacentMineCount(board, [row, column])

  if (adjacentMineCount === 0) {
    board[row][column] = REVEALED_BLANK

    for (const [plusRow, plusColumn] of adjacentIndexes) {
      const adjacentRow = row + plusRow
      const adjacentColumn = column + plusColumn
      if (
        board?.[adjacentRow]?.[adjacentColumn] === UNREVEALED_EMPTY
      ) {

        resolveEmpty(board, [adjacentRow, adjacentColumn])
      }
    }
  } else {
    board[row][column] = String(adjacentMineCount)
  }


  return board

};

const updateBoard = function (board, click) {
  const newBoard = [...board.map(row => [...row])];
  const [row, column] = click;


  const cellType = newBoard[row][column];
  if (cellType === REVEALED_BLANK) {
    return newBoard;
  } else if (cellType === REVEALED_MINE) {
    return newBoard;
  } else if (Number.isInteger(Number(cellType))) {
    return newBoard;
  } else if (cellType === UNREVEALED_MINE) {
    newBoard[row][column] = REVEALED_MINE;
  } else if (cellType === UNREVEALED_EMPTY) {
    resolveEmpty(newBoard, [row, column])
  }

  return newBoard;
};