2048 game script

a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
b = []
c = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
d = 0
f = 0
g = 0
h = 0
function newgame() {
  c = a
  a = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
  newtile()
  newtile()
}
function testtiles() {
  a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
}
function swapitems(list, item1, item2) {
  b = [];
  for (let i = 0; i < list.length; i++) {
    if (i == item1) {
      b = b.concat([list[item2]])
    } else {
      if (i == item2) {
        b = b.concat([list[item1]])
      } else {
        b = b.concat([list[i]])
      }
    }
  }
  return b;
}
function move() {
  for (let j = 0; j < 4; j++) {
    if (a[4*j+2] == 0 && a[4*j+3] !== 0) {
      a = swapitems(a, 4*j+2, 4*j+3)
    }
    if (a[4*j+1] == 0 && a[4*j+2] !== 0) {
      a = swapitems(a, 4*j+1, 4*j+2)
    }
    if (a[4*j+0] == 0 && a[4*j+1] !== 0) {
      a = swapitems(a, 4*j+0, 4*j+1)
    }
    if (a[4*j+2] == 0 && a[4*j+3] !== 0) {
      a = swapitems(a, 4*j+2, 4*j+3)
    }
    if (a[4*j+1] == 0 && a[4*j+2] !== 0) {
      a = swapitems(a, 4*j+1, 4*j+2)
    }
    if (a[4*j+2] == 0 && a[4*j+3] !== 0) {
      a = swapitems(a, 4*j+2, 4*j+3)
    }
  }
}
function merge() {
  for (let j = 0; j < 4; j++) {
    if(a[4*j+0] == a[4*j+1] && a[4*j+0] !== 0) {
      a.splice(4*j+0, 1, a[4*j+0]+1)
      a.splice(4*j+1, 1, 0)
    }
    if(a[4*j+2] == a[4*j+3] && a[4*j+2] !== 0) {
      a.splice(4*j+2, 1, a[4*j+2]+1)
      a.splice(4*j+3, 1, 0)
    }
    if(a[4*j+1] == a[4*j+2] && a[4*j+1] !== 0) {
      a.splice(4*j+1, 1, a[4*j+1]+1)
      a.splice(4*j+2, 1, 0)
    }
  }
}
function rotate() {
  a = [].concat(a[12]).concat(a[8]).concat(a[4]).concat(a[0]).concat(a[13]).concat(a[9]).concat(a[5]).concat(a[1]).concat(a[14]).concat(a[10]).concat(a[6]).concat(a[2]).concat(a[15]).concat(a[11]).concat(a[7]).concat(a[3])
}
function newtile() {
  if (a.includes(0)) {
    d = Math.floor(Math.random()*16)
    while (a[d] !== 0) {
      d = Math.floor(Math.random()*16)
    }
    if (Math.random() > 0.1) {a.splice(d, 1, 1)} else {a.splice(d, 1, 2)}
  }
}
function moveA() {
  c = a
  move()
  merge()
  move()
  if (a.includes(0) && a !== c) {
    newtile()
  }
}
function moveW() {
  c = a
  rotate()
  rotate()
  rotate()
  move()
  merge()
  move()
  rotate()
  if (a.includes(0) && a !== c) {
    newtile()
  }
}
function moveD() {
  c = a
  rotate()
  rotate()
  move()
  merge()
  move()
  rotate()
  rotate()
  if (a.includes(0) && a !== c) {
    newtile()
  }
}
function moveS() {
  c = a
  rotate()
  move()
  merge()
  move()
  rotate()
  rotate()
  rotate()
  if (a.includes(0) && a !== c) {
    newtile()
  }
}
newtile()
newtile()

w.on("msg", (data) => {
  if (data.msg == "move left") {
    moveA()
  }
  if (data.msg == "move up") {
    moveW()
  }
  if (data.msg == "move right") {
    moveD()
  }
  if (data.msg == "move down") {
    moveS()
  }
  if (data.msg == "new game") {
    newgame()
  }
});
w.on("pong", (data) => {
  f = cursor.x
  g = cursor.start
  h = cursor.y
  for (let i = 0; i < 13; i++) {
    for (let j = 0; j < 13; j++) {
      cursor.x = j - 6
      cursor.y = i + 9
      writeChar(".", 0)
    }
  }
  for (let dx = 0; dx < 4; dx++) {
    for (let dy = 0; dy < 4; dy++) {
      cursor.x = dy*3-5
      cursor.y = dx*3+10
      writeChar("          12482222"[a[dx*4+dy]], 0)
    }
  }
  for (let dx = 0; dx < 4; dx++) {
    for (let dy = 0; dy < 4; dy++) {
      cursor.x = dy*3-4
      cursor.y = dx*3+10
      writeChar("       1250001^^^^"[a[dx*4+dy]], 0)
    }
  }
  for (let dx = 0; dx < 4; dx++) {
    for (let dy = 0; dy < 4; dy++) {
      cursor.x = dy*3-5
      cursor.y = dx*3+11
      writeChar("    13625124991111"[a[dx*4+dy]], 0)
    }
  }
  for (let dx = 0; dx < 4; dx++) {
    for (let dy = 0; dy < 4; dy++) {
      cursor.x = dy*3-4
      cursor.y = dx*3+11
      writeChar(" 24862486248624567"[a[dx*4+dy]], 0)
    }
  }
  cursor.x = -6
  cursor.y = 7
  writeChar("2", 1)
  writeChar("0", 1)
  writeChar("4", 1)
  writeChar("8", 1)
  cursor.x = 10
  cursor.y = 14
  writeChar("W", 0)
  cursor.x = 8
  cursor.y = 15
  writeChar("A", 0)
  cursor.x = 10
  cursor.y = 16
  writeChar("S", 0)
  cursor.x = 12
  cursor.y = 15
  writeChar("D", 0)
  cursor.x = 10
  cursor.y = 18
  writeChar("+", 0)
  cursor.x = f
  cursor.start = g
  cursor.y = h
});
w.on("cursor", (data) => {
  if (data.l[0] ==10  && data.l[1] == 14) {
    moveW()
  }
  if (data.l[0] == 8 && data.l[1] == 15) {
    moveA()
  }
  if (data.l[0] == 10 && data.l[1] == 16) {
    moveS()
  }
  if (data.l[0] == 12 && data.l[1] == 15) {
    moveD()
  }
  if (data.l[0] == 10 && data.l[1] == 18) {
    newgame()
  }
});
w.chat.send("2048 bot initiated. say move direction to move tiles. say new game to make a new game. or maybe you can use the canvas keys if you don't wanna chat.", 0)