socket-io-example/index.html at master · eulogik/socket-io-example · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <title>Socket.io demo :: Eulogik</title>
    <style media="screen">
      #online{
        display: none;
      }
      /*#users>li>span{
        float: right;
      }*/
    </style>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.1/socket.io.slim.js"></script>
    <script src="https://code.jquery.com/jquery-1.11.1.js"></script>

    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">


    <script>

    function timeSince(date) {

  var seconds = Math.floor((new Date() - date) / 1000);

  var interval = Math.floor(seconds / 31536000);

  if (interval > 1) {
    return interval + " years";
  }
  interval = Math.floor(seconds / 2592000);
  if (interval > 1) {
    return interval + " months";
  }
  interval = Math.floor(seconds / 86400);
  if (interval > 1) {
    return interval + " days";
  }
  interval = Math.floor(seconds / 3600);
  if (interval > 1) {
    return interval + " hours";
  }
  interval = Math.floor(seconds / 60);
  if (interval > 1) {
    return interval + " minutes";
  }
  return Math.floor(seconds) + " seconds";
}

var $users = new Array();

      $(function () {
        var people_online = new Array();
        var socket = io();

        $('form').submit(function(){
          if($('#user').val()!=''){
          socket.emit('people online', $('#user').val());
          $('#user').val('');
          $(this).hide();
          $('#online').show();
          return false;
          }
          else {
             $('.form-group').addClass('has-danger').find('#user').addClass('form-control-danger');
             return false;
          }
        });

        socket.on('online now', function(users){
            $users = users;
            updateUsers();
        });


      });
      function updateUsers(){
        $('#users').empty();
        $.each($users, function(i){
          $('#users').append($('<li class="list-group-item justify-content-between">').html($users[i].name+' <small>'+timeSince($users[i].since)+'</small>'));
        });
        console.log('time updated');

      }

      var t = setInterval(updateUsers, 1000);

    </script>

  </head>
  <body>
    <div class="container">
      <h1>
        Socket.io Demo
        <small class="text-muted">by Eulogik</small>
      </h1>
<hr>
      <div class="row justify-content-md-center">
        <div class="col-lg-6">

          <form id="login" action="">
            <div class="card">
              <div class="card-block">
                <h4 class="card-title">Login</h4>
                <div class="form-group">
                  <input type="text"  class="form-control" id="user" placeholder="Enter username">
                </div>
                <button type="submit" class="btn btn-primary">Login &raquo;</button>
              </div>
            </div>

          </form>
        </div>
      </div>
        <div id="online">
          <h3>Users online</h2>
          <ul class="list-group" id="users">

          </ul>

        </div>
  </div>
  </body>
</html>