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script.js
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script.js
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const gameBody = document.getElementById('gameBody')
gameStateSpan = document.getElementById('gameState')
gameLevelSpan = document.getElementById('gameLevel')
startPos = 0
endPos = 4 // 6x6 grid as it starts from 0
gameState = {
status: 'aiming',
level: 1
}
foodIcon = "🍎"
obsatcleIcon = "🔥"
eatIcon = "✅";
let movePos = [0, 0]
// levels by level
const levels = {
1: {
[`[${endPos - 1},0]`]: true,
[`[${endPos},0]`]: true,
[`[${endPos},${endPos}]`]: true,
// [`[${endPos},0]`]: true
},
2: {
[`[1,${endPos}]`]: true,
'[2,0]': true,
'[3,3]': true,
},
3: {
[`[0,${endPos}]`]: true,
[`[2,${endPos - 1}]`]: true,
[`[${endPos},0]`]: true,
},
4: {
[`[1,${endPos - 1}]`]: true,
[`[2,1]`]: true,
[`[3,${endPos}]`]: true,
[`[${endPos},0]`]: true,
},
5: {
[`[2,0]`]: true,
[`[3,1]`]: true,
[`[${endPos},${endPos - 1}]`]: true,
[`[${endPos},${endPos}]`]: true,
}
}
const isAnObstacle = (pos) => {
return levels[gameState.level][`[${pos}]`]
}
const buildGame = () => {
for (let i = 0; i < endPos + 1; i++) {
const tr = document.createElement('tr');
for (let j = 0; j < endPos + 1; j++) {
const aim = document.createElement('img');
aim.src = "./images/aim.svg"
aim.classList.add('absolute', 'aim', 'top-0', 'left-0', 'w-full', `${i == 0 && j == 0 ? 'opacity-100' : 'opacity-0'}`)
const td = document.createElement('td')
td.classList.add('p-6', 'relative', "text-lg", 'bg-gray-500')
// food
const food = document.createElement("span");
// put some obsatcles
if (isAnObstacle([i, j])) {
food.textContent = obsatcleIcon
td.setAttribute("data-blocked", true)
} else {
food.textContent = foodIcon
td.setAttribute("data-blocked", false)
td.setAttribute("data-eaten", false)
}
food.classList.add("food")
td.append(food)
td.append(aim)
td.setAttribute('data-pos', [i, j])
tr.append(td)
}
gameBody.append(tr)
}
}
const resetGame = () => {
movePos = [0, 0]
gameState.status = "aiming"
gameBody.innerHTML = "";
gameLevelSpan.textContent = `Level ${gameState.level}`
gameStateSpan.textContent = "🎯 Move ⁘ & Press Space or Enter to start"
buildGame()
}
// init the game
resetGame()
const nextLevel = () => {
if (gameState.level + 1 > Object.keys(levels).length) {
alert('We only have 5 levels for now, come back later for more levels');
return;
}
gameState.level = Math.min(gameState.level + 1, Object.keys(levels).length)
gameLevelSpan.textContent = `Level ${gameState.level}`
resetGame()
}
const toggleAimDisplay = (show) => {
document.querySelector(`td[data-pos='${movePos}']`).querySelector("img").style.opacity = show ? 1 : 0
}
const snakeFace = document.createElement("img");
snakeFace.src = "./images/snake.png";
snakeFace.classList.add('absolute', 'aim', 'top-0', 'left-0', 'w-full', 'snakeFace')
const didWin = () => {
// user wins when he eats all the food except the levels ofc
return document.querySelectorAll(".food[data-eaten='true']").length == Math.pow(endPos + 1, 2) - Object.keys(levels[gameState.level]).length;
}
const eatFood = (key, from, to) => {
if (key === "ArrowRight") {
// mark the TDs i moved throght as blocked
for (let i = from[1]; i <= to[1]; i++) {
let td = document.querySelector(`td[data-pos='${[from[0], i]}']`)
let food = td.querySelector(".food")
food.textContent = eatIcon;
food.setAttribute("data-eaten", true)
td.setAttribute("data-blocked", true)
}
}
if (key === "ArrowLeft") {
// mark the TDs i moved throght as blocked
for (let i = from[1]; i >= to[1]; i--) {
let td = document.querySelector(`td[data-pos='${[from[0], i]}']`)
let food = td.querySelector(".food")
food.textContent = eatIcon;
food.setAttribute("data-eaten", true)
td.setAttribute("data-blocked", true)
}
// move left
}
if (key === "ArrowUp") {
// mark the TDs i moved throght as blocked
for (let i = from[0]; i >= to[0]; i--) {
let td = document.querySelector(`td[data-pos='${[i, from[1]]}']`)
let food = td.querySelector(".food")
food.textContent = eatIcon;
food.setAttribute("data-eaten", true)
td.setAttribute("data-blocked", true)
}
// move up
}
if (key === "ArrowDown") {
// mark the TDs i moved throght as blocked
for (let i = from[0]; i <= to[0]; i++) {
let td = document.querySelector(`td[data-pos='${[i, from[1]]}']`)
let food = td.querySelector(".food")
food.textContent = eatIcon;
food.setAttribute("data-eaten", true)
td.setAttribute("data-blocked", true)
}
// move down
}
}
const moveSnake = (dir) => {
if (dir === "ArrowRight") {
// move right until the first blocked
for (let i = movePos[1] + 1; i < endPos + 1; i++) {
movePos[1] = Math.min(endPos - 1, movePos[1])
let td = document.querySelector(`td[data-pos='${[movePos[0], i]}']`)
if (td.getAttribute("data-blocked") == "false") {
movePos[1] += 1
} else {
break
}
}
}
if (dir === "ArrowLeft") {
// move left until the first blocked
for (let i = movePos[1] - 1; i >= 0; i--) {
movePos[1] = Math.max(0, movePos[1])
let td = document.querySelector(`td[data-pos='${[movePos[0], i]}']`)
if (td.getAttribute("data-blocked") == "false") {
movePos[1] -= 1
} else {
break
}
}
}
if (dir === "ArrowUp") {
// move up until the first blocked
for (let i = movePos[0] - 1; i >= 0; i--) {
movePos[0] = Math.max(0, movePos[0])
let td = document.querySelector(`td[data-pos='${[i, movePos[1]]}']`)
if (td.getAttribute("data-blocked") == "false") {
movePos[0] -= 1
} else {
break
}
}
}
if (dir === "ArrowDown") {
// let mvTo = 0
// stop at the first blocked
for (let i = movePos[0] + 1; i < endPos + 1; i++) {
movePos[0] = Math.min(endPos - 1, movePos[0])
// console.log(i)
let td = document.querySelector(`td[data-pos='${[i, movePos[1]]}']`)
// console.log(td)
if (td.getAttribute("data-blocked") == "false") {
movePos[0] += 1
} else {
break
}
}
}
}
const moveAim = (key) => {
toggleAimDisplay(false)
if (key === "ArrowRight") {
// move right
let mvTo = Math.min(movePos[1] + 1, endPos);
if (document.querySelector(`td[data-pos='${[movePos[0], mvTo]}']`).getAttribute("data-blocked") == "true") {
mvTo = movePos[1]
}
movePos[1] = mvTo
}
if (key === "ArrowLeft") {
// left
let mvTo = Math.max(movePos[1] - 1, 0);
if (document.querySelector(`td[data-pos='${[movePos[0], mvTo]}']`).getAttribute("data-blocked") == "true") {
mvTo = movePos[1]
}
movePos[1] = mvTo
}
if (key === "ArrowUp") {
// up
let mvTo = Math.max(movePos[0] - 1, 0);
if (document.querySelector(`td[data-pos='${[mvTo, movePos[1]]}']`).getAttribute("data-blocked") == "true") {
mvTo = movePos[0]
}
movePos[0] = mvTo
}
if (key === "ArrowDown") {
// down
let mvTo = Math.min(movePos[0] + 1, endPos);
if (document.querySelector(`td[data-pos='${[mvTo, movePos[1]]}']`).getAttribute("data-blocked") == "true") {
mvTo = movePos[0]
}
movePos[0] = mvTo
}
toggleAimDisplay(true)
}
document.addEventListener('keydown', function (event) {
const key = event.code;
// choosing the starting point
if (gameState.status == "aiming") {
moveAim(key)
if (key == "Space" || key == "Enter") {
// select the starting point and update the game state to "playing"
toggleAimDisplay(false)
gameState.status = "playing"
gameStateSpan.textContent = "🐍 Now try to eat all the food, its tricky"
document.querySelector(`td[data-pos='${movePos}']`).append(snakeFace);
}
} else {
if (key == "Escape") {
resetGame()
}
// we are playing steve
// remove the snake face from the current position
const currentTd = document.querySelector(`td[data-pos='${movePos}']`)
currentTd.querySelector(".snakeFace").remove()
const from = [...movePos] // copy of the prev move
moveSnake(key)
eatFood(key, from, movePos)
// show it on the news position
document.querySelector(`td[data-pos='${movePos}']`).append(snakeFace);
if (didWin()) {
nextLevel()
}
}
});