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minesweeper-ascii.js
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minesweeper-ascii.js
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function minesweeperAscii(size = 10, mines = 10) {
const getNeighbouringCoords = (x, y) =>
[
[y, x + 1],
[y, x - 1],
[y - 1, x],
[y - 1, x - 1],
[y - 1, x + 1],
[y + 1, x],
[y + 1, x + 1],
[y + 1, x - 1],
].filter(([y, x]) => y >= 0 && x >= 0 && x < size && y < size)
const createMatrix = (v) =>
Array(size)
.fill([])
.map(() => Array(size).fill(v))
let field = createMatrix(0)
let uncoveredField = createMatrix(false)
let flaggedField = createMatrix(false)
const setMines = () => {
let minesLeft = mines
while (minesLeft--) {
const mineX = Math.round(Math.random() * (size - 1))
const mineY = Math.round(Math.random() * (size - 1))
if (field[mineY][mineX] !== "m") {
field[mineY][mineX] = "m"
getNeighbouringCoords(mineX, mineY)
.filter(([y, x]) => field[y][x] !== "m")
.forEach(([y, x]) => {
field[y][x]++
})
}
}
}
const checkIfWon = () => {
return flaggedField.every((row, y) =>
row.every((cell, x) => {
return (
(cell && field[y][x] === "m") ||
(!cell && field[y][x] !== "m")
)
})
)
}
const characterMap = {
m: "[x]",
0: " 0 ",
1: " 1 ",
2: " 2 ",
3: " 3 ",
4: " 4 ",
5: " 5 ",
6: " 6 ",
7: " 7 ",
8: " 8 ",
}
const renderField = (playerX, playerY) => {
console.clear()
console.log("===".repeat(size + 2))
for (let y = 0; y < size; ++y) {
let row = "|||"
for (let x = 0; x < size; ++x) {
if (x === playerX && y === playerY) row += "\x1b[47m\x1b[30m"
if (flaggedField[y][x]) row += "<|>"
else if (uncoveredField[y][x]) row += characterMap[field[y][x]]
else row += " "
if (x === playerX && y === playerY) row += "\x1b[0m"
}
row += "|||"
console.log(row)
}
console.log("===".repeat(size + 2))
console.log("Press ENTER to uncover a field, SPACE to place a flag")
}
const uncoverCoords = (x, y) => {
uncoveredField[y][x] = true
const neighbours = getNeighbouringCoords(x, y)
if (field[y][x] === 0)
neighbours.forEach(([y, x]) => {
if (uncoveredField[y][x] !== true) uncoverCoords(x, y)
})
}
let playerX = 0
let playerY = 0
let hasLost = false
let hasWon = false
setMines()
renderField(playerX, playerY)
const readlineModule = require("readline")
readlineModule.emitKeypressEvents(process.stdin)
process.stdin.setRawMode(true)
process.stdin.on("keypress", (character, key) => {
if (!hasLost && !hasWon) {
if (key.name === "right" && playerX < size - 1) playerX++
if (key.name === "left" && playerX > 0) playerX--
if (key.name === "down" && playerY < size - 1) playerY++
if (key.name === "up" && playerY > 0) playerY--
if (key.name === "return") {
uncoverCoords(playerX, playerY)
if (field[playerY][playerX] === "m") {
hasLost = true
uncoveredField = Array(size)
.fill([])
.map(() => Array(size).fill(true))
}
}
if (key.name === "space") {
flaggedField[playerY][playerX] = !flaggedField[playerY][playerX]
hasWon = checkIfWon()
}
} else {
if (key.name === "return") {
field = createMatrix(0)
uncoveredField = createMatrix(false)
flaggedField = createMatrix(false)
playerX = 0
playerY = 0
hasLost = false
hasWon = false
setMines()
}
}
renderField(playerX, playerY)
if (hasLost) {
console.log("Lost :(\n")
console.log("Press ENTER to play again? (Ctrl+C to abort)")
}
if (hasWon) {
console.log("Won :)\n")
console.log("Press ENTER to play again? (Ctrl+C to abort)")
}
if (key.name === "c" && key.ctrl) {
console.log("Thanks for playing! Made by 01-DC")
process.exit(0)
}
})
}
module.exports = minesweeperAscii