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1. 코드

// express, socket.io , fs , nodemon

const socketio = require("socket.io");
const express = require("express");
const app = express();
const fs = require("fs");
const PORT = 4000;
const server = app.listen(PORT, () => {
  console.log("server start");
});
const io = socketio(server);

let daehan = [
  [1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
];
let asiana = [
  [1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
];
let jeju = [
  [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
  [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1],
];
let seats = [];
let timeTable = 3;
// ... 은 얕은복사
for (let i = 0; i < timeTable; i++) {
  seats.push(
    JSON.parse(JSON.stringify(daehan)),
    JSON.parse(JSON.stringify(asiana)),
    JSON.parse(JSON.stringify(jeju))
  );
}

app.get("/", (req, res) => {
  fs.readFile("homework/page2.html", "utf-8", (err, data) => {
    res.send(data.toString());
  });
});

app.get("/seats", (req, res) => {
  res.send(seats);
});

io.sockets.on("connection", (socket) => {
  socket.on("reserve", (data) => {
    seats[data.Time][data.y][data.x] = 2;
    socket.emit("reserve", data);
  });
});​
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        padding: 0;
        margin: 0;
      }
      body {
        width: 100%;
        height: 100vh;
      }
      .line {
        overflow: hidden;
      }
      .seat {
        margin: 2px;
        float: left;
        width: 30px;
        height: 30px;
        border-radius: 3px;
      }
      .enable {
        background-color: gray;
      }
      .enable:hover {
        background-color: rgb(195, 190, 190);
        cursor: pointer;
      }
      .disable {
        background-color: blue;
      }
      .startReserve {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 300px;
        height: 300px;
        font-size: 50px;
        font-weight: bold;
        background-color: beige;
      }
      .Wrap {
        position: absolute;
        top: 25%;
        left: 50%;
        transform: translate(-50%, -50%);
        display: flex;
      }
      .forTimeSelectDiv {
        display: none;
        margin-right: 50px;
        height: 100px;
        width: 400px;
      }
      .forBrandSelectDiv {
        display: none;
        width: 400px;
      }
      .forTimeSelectDiv button,
      .forBrandSelectDiv button {
        width: 100px;
        height: 50px;
        border-radius: 5px;
        font-weight: bold;
      }
      .time {
        display: none;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
      }
      .showProperty {
        position: absolute;
        top: 30%;
        left: 50%;
        transform: translate(-50%, -50%);
        display: none;
      }
      .showCurrent {
        font-size: 30px;
        font-weight: bold;
      }
      .colorEnable,
      .colordisable {
        width: 10px;
        height: 10px;
      }
      .colorEnable {
        background-color: gray;
      }
      .colordisable {
        background-color: blue;
      }
      .showColor {
        display: flex;
        margin-left: 100px;
        justify-content: center;
        align-items: center;
        font-size: 15px;
      }
      button {
        cursor: pointer;
      }
    </style>

    <script src="https://code.jquery.com/jquery-3.5.1.js"></script>
    <script src="/socket.io/socket.io.js"></script>
  </head>
  <body>
    <button class="startReserve">예매하기</button>
    <div class="Wrap">
      <div class="forTimeSelectDiv">
        시간
        <button class="timeSelect">13 : 00</button>
        <button class="timeSelect">15 : 00</button>
        <button class="timeSelect">17 : 00</button>
      </div>
      <div class="forBrandSelectDiv">
        항공사
        <button class="brandSelect">대한항공</button>
        <button class="brandSelect">아시아나</button>
        <button class="brandSelect">제주항공</button>
      </div>
    </div>
    <div class="showProperty">
      <div class="showCurrent"></div>
      <div class="showColor">
        <div class="colorEnable"></div>
        예약가능
        <div class="colordisable"></div>
        예약불가
      </div>
    </div>
  </body>
  <script>
    const socket = io();
    socket.on("reserve", (data) => {
      let $target = $(
        "div[data-Time =" +
          data.Time +
          "][data-x = " +
          data.x +
          "][data-y = " +
          data.y +
          "]"
      );
      $target.removeClass("enable");
      $target.addClass("disable");
    });

    $(window).ready(function () {
      const onClickSeat = function () {
        if ($(this).hasClass("disable")) {
          return;
        }

        let Time = $(this).attr("data-Time");
        let x = $(this).attr("data-x");
        let y = $(this).attr("data-y");
        if (confirm("예매 하겠습니까?")) {
          socket.emit("reserve", {
            Time,
            x,
            y,
          });
        } else {
          alert("취소 되었습니다.");
        }
      };

      $.getJSON("/seats", { dummy: new Date().getTime() }, (data) => {
        $.each(data, (indexTime, time) => {
          let $time = $("<div></div>").addClass("time");
          $.each(time, (indexY, line) => {
            let $line = $("<div></div>").addClass("line").appendTo($time);
            $.each(line, (indexX, seat) => {
              let $seat = $("<div></div>", {
                class: "seat",
                "data-Time": indexTime,
                "data-x": indexX,
                "data-y": indexY,
              }).appendTo($line);

              if (seat == 1) {
                $seat.addClass("enable").on("click", onClickSeat);
              } else if (seat == 2) {
                $seat.addClass("disable");
              }
            });
          });
          $time.appendTo("body");
        });
      });

      //시간, 항공사 클릭 관련 쿼리셀렉터
      let timeSelect = document.querySelectorAll(".timeSelect");
      let brandSelect = document.querySelectorAll(".brandSelect");
      //시간 클릭시 항공사 클릭버튼 나타나기
      $(".startReserve").on("click", () => {
        $(".forTimeSelectDiv").css("display", "block");
        $(".startReserve").css("display", "none");
        $(".timeSelect").on("click", () => {
          $(".forBrandSelectDiv").css("display", "block");
          $(".brandSelect").on("click", () => {
            $(".showProperty").css("display", "flex");
          });
        });
      });

      //버튼 클릭시
      for (let i = 0; i < timeSelect.length; i++) {
        timeSelect[i].onclick = function (e) {
          for (let k = 0; k < brandSelect.length; k++) {
            brandSelect[k].onclick = function (v) {
              $(".showCurrent").text(
                e.target.innerText + " " + v.target.innerText
              );
              let time = document.querySelectorAll(".time");
              for (let j = 0; j < time.length; j++) {
                time[j].style.display = "none";
              }
              time[3 * i + k].style.display = "block";
            };
          }
        };
      }
    });
  </script>
</html>

2. 결과

AJAX를 사용하여 데이터를 받아오기 위해 JQUERY를 사용함

시간, 항공사별로 다른 데이터를 불러왔다.

이 데이터들을 불러오려고 깊은복사를 이용해서 데이터 배열을 만들었다.

 

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