WebSocket/index.html at master · Bellboy-Capstone/WebSocket · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- Page Properties -->
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1,
    shrink-to-fit=no"
    />

    <!-- Site Title and Description -->
    <title>WebSocket Service</title>

    <!-- Scripts and Styling -->
    <script type="application/javascript" async defer>
      /* JavaScript! */
      var update_number = 1;

      /**
       * Checks if being served from localhost and returns proper backend URL.
       * @returns {string} The URL for the backend websocket connection.
       */
      function getServerUrl() {
        var url = window.location.href.toString();
        // TODO: Replace this with deployment URL.
        var server = "wss://" + location.host;

        // If running in development, point requests to localhost:8000
        if (url.indexOf("localhost") == 7) {
          console.log(
            "getServerUrl: In development mode, using local backend."
          );
          server = "ws://localhost:3000";
        }

        console.log("Using server " + server);
        return server;
      }

      function addText(string, elementId) {
        var bb = document.getElementById(elementId);
        var msg = document.createElement("p");
        msg.innerText = string;
        bb.appendChild(msg);
        msg.scrollIntoView();
      }
      function onClose(event) {
        console.log("disconnected");
      }
      function setupBellboy() {
        // Creates a websocket connection as the bellboy.
        let bellboy = new WebSocket(getServerUrl());
        bellboy.onopen = function () {
          console.log("connection opened");
          bellboy.send("BELLBOY"); // Register.

          setInterval(function () {
            console.log(
              "Sending hello #" +
                update_number +
                " to the backend from the bellboy..."
            );
            var str = "Status update #" + update_number++ + " from bellboy.";
            bellboy.send(str);
            str = "SEND: " + str;
            addText(str, "bellboy-text");
          }, 1000);
        };
      }

      /**
       * To be implemented in Website repository:
       * "Live feed" with messages from all active bellboys.
       *
       * Create a scrolling box that, when onmessage is called and
       * a new message is received, adds the message to the bottom of the
       * scroll-box. Can be implemented based on the minimal
       * example below.
       *
       */
      function setupWebsite() {
        // Creates a websocket connection as the website.
        let website = new WebSocket(getServerUrl());
        website.onopen = function () {
          website.send("WEBSITE"); // Register.
          website.onmessage = function (event) {
            console.log("Got data: " + event.data);
            var str = "RECV: " + event.data;
            addText(str, "website-text");
          };
        };
      }

      /*
       * On load operation. Calls a number of functions once the DOM is ready.
       * All features should be called in this block.
       */

      window.addEventListener("load", function (event) {
        setupBellboy();
        setupWebsite();
        onClose();
      });
    </script>

    <style>
      html,
      body {
        background: white;
        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
        height: 98%;
        overflow: hidden;
        text-align: left;
      }
      .container {
        display: flex;
        height: 98%;
      }
      .child {
        flex: 1;
        border: 1px solid black;
        padding: 5px;
        margin: 5px;
        height: 98%;
        display: block;
      }
      .scroll-container {
        border: 1px solid black;
        height: 80%;
        overflow-y: scroll;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="child">
        <h1>Bellboy</h1>
        <p>Log messages:</p>
        <div class="scroll-container">
          <div id="bellboy-text" class="scroll"></div>
        </div>
      </div>
      <div class="child">
        <h1>Website</h1>
        <p>Log messages:</p>
        <div class="scroll-container">
          <div id="website-text" class="scroll"></div>
        </div>
      </div>
    </div>
  </body>
</html>