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board.js
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board.js
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MineSweeper.Board = function(width, height, bombs) {
var boardCells = []; // Cells arranged as a 2D matrix
var cellsNotContainingBomb = []; // Cells arranged in a vector
var cellsContainingBomb = []; // The rest of the cells
var atLeastOneCellRevealed = false;
var countBlockedCells = 0;
var countHiddenCells = 0;
var buildBoard = function() {
for (var i=0; i<height; i++) {
boardCells[i] = [];
for (var j=0; j<width; j++) {
boardCells[i][j] = MineSweeper.Cell(i, j);
}
}
};
var resetBoard = function() {
cellsNotContainingBomb = [];
cellsContainingBomb = [];
countHiddenCells = width * height;
for (var i=0; i<height; i++) {
for (var j=0; j<width; j++) {
boardCells[i][j].hide().removeBomb();
cellsNotContainingBomb.push(boardCells[i][j]);
}
}
atLeastOneCellRevealed = false;
countBlockedCells = 0;
return this;
};
var deployBombsInBoard = function() {
cellsContainingBomb = [];
for (var i=0; i<bombs; i++) {
var cellWhereToDropTheBomb = getRandomElementFrom(cellsNotContainingBomb);
deployBombIn(cellWhereToDropTheBomb);
}
return this;
};
var deployBombIn = function(cell) {
cell.putBomb();
cellsContainingBomb.push(cell);
cellsNotContainingBomb.splice(cellsNotContainingBomb.indexOf(cell), 1);
};
var getAllBombs = function() {
return cellsContainingBomb;
};
var getSurroundingCells = function(row, column) {
var ret = [];
var hasTop = row > 0,
hasBottom = row < (height-1),
hasLeft = column > 0,
hasRight = column < (width-1);
if (hasLeft) ret.push(boardCells[row][column-1]);
if (hasLeft && hasTop) ret.push(boardCells[row-1][column-1]);
if (hasTop) ret.push(boardCells[row-1][column]);
if (hasTop && hasRight) ret.push(boardCells[row-1][column+1]);
if (hasRight) ret.push(boardCells[row][column+1]);
if (hasRight && hasBottom) ret.push(boardCells[row+1][column+1]);
if (hasBottom) ret.push(boardCells[row+1][column]);
if (hasBottom && hasLeft) ret.push(boardCells[row+1][column-1]);
return ret;
};
var initializeBoard = function() {
buildBoard();
resetBoard();
deployBombsInBoard();
return this;
};
var hasBombAtPosition = function(row, column) {
return boardCells[row][column].hasBomb();
};
var numBombsSurroundingPosition = function(row, column) {
return getSurroundingCells(row, column).filter(function(cell) {
return cell.hasBomb();
}).length;
};
var numcountBlockedCellsSurrooundingPosition = function(row, column) {
return getSurroundingCells(row, column).filter(function(cell) {
return cell.isBlocked();
}).length;
}
var getRandomElementFrom = function(arr) {
return arr[Math.floor(Math.random()*arr.length)];
};
var exposeCellAtPosition = function(row, column) {
var wasExposed = boardCells[row][column].isExposed();
boardCells[row][column].expose();
var nowIsExposed = boardCells[row][column].isExposed();
if (nowIsExposed) {
atLeastOneCellRevealed = true;
if (!wasExposed) {
countHiddenCells--;
}
}
}
var isExposedCellAtPosition = function(row, column) {
return boardCells[row][column].isExposed();
}
var toggleBlockCellAtPosition = function(row, column) {
var wasBlocked = isBlockedCellAtPosition(row, column);
boardCells[row][column].toggleBlock();
var nowIsBlocked = isBlockedCellAtPosition(row, column);
if (wasBlocked && !nowIsBlocked) countBlockedCells--;
if (!wasBlocked && nowIsBlocked) countBlockedCells++;
}
var howManyCellsAreBlocked = function() {
return countBlockedCells;
}
var howManyCellsAreHidden = function() {
return countHiddenCells;
}
var isBlockedCellAtPosition = function(row, column) {
return boardCells[row][column].isBlocked();
}
var validateAllFreeCellsExposed = function() {
for (var i=0, l=cellsNotContainingBomb.length; i<l; i++) {
if (cellsNotContainingBomb[i].isHidden()) return false;
}
return true;
}
var isAtLeastOneCellExposed = function() {
return atLeastOneCellRevealed;
}
return {
width: width,
height: height,
numBombs: bombs,
init: initializeBoard,
hasBomb: hasBombAtPosition,
bombs: getAllBombs,
bombsAround: numBombsSurroundingPosition,
blockedAround: numcountBlockedCellsSurrooundingPosition,
cellsAround: getSurroundingCells,
expose: exposeCellAtPosition,
isExposed: isExposedCellAtPosition,
validate: validateAllFreeCellsExposed,
toggleBlock: toggleBlockCellAtPosition,
isBlocked: isBlockedCellAtPosition,
atLeastOneCell: isAtLeastOneCellExposed,
blockedCells: howManyCellsAreBlocked,
hiddenCells: howManyCellsAreHidden
};
};