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let height = 10
let width = 10
let mine_rate = 0.10
let current_time = undefined
let interval = undefined
let mines = []
let visited = []
let running = false
function isValidPos(y, x) {
return y >= 0 && y < height && x >= 0 && x < width
}
function* neighboursGenerator(y, x) {
for (let i = -1; i <= 1; i++) {
for (let j = -1; j <= 1; j++) {
if (i === 0 && j === 0)
continue
let ret = [y + i, x + j]
if (!isValidPos(...ret))
continue
yield ret
}
}
}
let cells = []
function floodFill(y, x) {
visited[y][x] = true
let cell = cells[y][x]
cell.classList.add("visited")
if (mines[y][x] !== 0)
cell.textContent = mines[y][x]
switch (mines[y][x]) {
case 1: cell.style.color = "blue"; break
case 2: cell.style.color = "green"; break
case 3: cell.style.color = "red"; break
case 4: cell.style.color = "darkblue"; break
case 5: cell.style.color = "brown"; break
case 6: cell.style.color = "cyan"; break
case 7: cell.style.color = "black"; break
case 8: cell.style.color = "grey"; break
}
if (mines[y][x] !== 0)
return
for (let [ny, nx] of neighboursGenerator(y, x))
if (!visited[ny][nx])
floodFill(ny, nx)
}
const timer_node = document.getElementById("minesweeper-timer")
const flash_message_node = document.getElementById("flash-message")
flash_message_node.addEventListener("click", () => { flash_message_node.hidden = true })
function endFlashMessage(won) {
flash_message_node.textContent =
`You ${won ? "won" : "lost"} in ${timer_node.textContent} seconds`
flash_message_node.classList.remove("flash-won")
flash_message_node.classList.remove("flash-lost")
flash_message_node.classList.add(won ? "flash-won" : "flash-lost")
flash_message_node.hidden = false;
setTimeout(() => { flash_message_node.hidden = true }, 5000)
}
function initGrid() {
let table = document.getElementById("minesweeper-table")
table.innerHTML = ""
width = document.getElementById("minesweeper-width").value
height = document.getElementById("minesweeper-height").value
mine_rate = document.getElementById("minesweeper-mine-rate").value / 100
mines = []
visited = []
cells = []
for (let i = 0; i < height; i++) {
mines.push(new Array(width))
visited.push(new Array(width))
for (let j = 0; j < width; j++) {
mines[i][j] = Math.random() < mine_rate ? -1 : 0;
visited[i][j] = false;
}
}
// count neighbour mines
for (let i = 0; i < height; i++) {
for (let j = 0; j < width; j++) {
if (mines[i][j] === -1)
continue
mines[i][j] =
[...neighboursGenerator(i, j)]
.filter(([y, x]) => mines[y][x] === -1)
.length
}
}
for (let i = 0; i < height; i++) {
cells.push([])
let table_row = document.createElement("tr")
for (let j = 0; j < width; j++) {
let table_cell = document.createElement("td")
let cell = document.createElement("button")
cell.textContent = ""
cell.addEventListener("click", () => {
if (!running)
toggleRunning()
if (cell.classList.contains("flagged")) {
cell.classList.remove("flagged")
return
}
if (mines[i][j] === -1) {
toggleRunning()
endFlashMessage(false)
}
else {
floodFill(i, j)
won = true;
for (let y = 0; y < width; y++) {
for (let x = 0; x < width; x++) {
if (mines[y][x] !== -1 && !cells[y][x].classList.contains("visited"))
won = false
}
}
if (won) {
toggleRunning()
endFlashMessage(true)
}
}
})
cell.addEventListener("contextmenu", event => {
event.preventDefault()
if (!running)
toggleRunning()
if (cell.classList.contains("visited"))
return
if (cell.classList.contains("flagged"))
cell.classList.remove("flagged")
else
cell.classList.add("flagged")
})
cells[i].push(cell)
table_cell.appendChild(cell)
table_row.appendChild(table_cell)
}
table.appendChild(table_row)
}
}
for (input of document.querySelectorAll("#minesweeper-settings input")) {
input.addEventListener("input", () => initGrid())
}
function toggleRunning() {
flash_message_node.hidden = true;
if (running) {
clearInterval(interval)
initGrid()
}
else {
current_time = 0
timer_node.textContent = current_time
interval = setInterval(() => {
timer_node.textContent = current_time
current_time++
}, 1000)
}
running = !running
let settings = document.getElementById("minesweeper-settings")
let info = document.getElementById("minesweeper-game-info")
settings.hidden = !settings.hidden
info.hidden = !info.hidden
}
document.getElementById("minesweeper-stop").addEventListener("click", toggleRunning)
initGrid()
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