shardweb/assets/js/app.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

// Brunch automatically concatenates all files in your
// watched paths. Those paths can be configured at
// config.paths.watched in "brunch-config.js".
//
// However, those files will only be executed if
// explicitly imported. The only exception are files
// in vendor, which are never wrapped in imports and
// therefore are always executed.

// Import dependencies
//
// If you no longer want to use a dependency, remember
// to also remove its path from "config.paths.watched".
import "phoenix_html"

// Import local files
//
// Local files can be imported directly using relative
// paths "./socket" or full ones "web/static/js/socket".

import socket from "./socket"

var chat_channel = window.Gon.getAsset('chat_channel');
if (chat_channel != undefined)
{
  var channel = socket.channel(chat_channel, {}); // connect to chat "room"

  channel.on('shout', function (payload) { // listen to the 'shout' event
    var li = document.createElement("li"); // creaet new list item DOM element
    var name = payload.name || 'guest';    // get name from payload or set default
    li.innerHTML = '<b>&lt;' + name + '</b> <small>' + payload.pk16 + '</small><b>&gt;</b> ' + payload.message; // set li contents

    console.log(ul.scrollTop + ' ' + ul.scrollHeight + ' ' + ul.clientHeight);
    var must_scroll = (ul.scrollTop >= ul.scrollHeight - ul.clientHeight - 10);

    ul.appendChild(li);                    // append to list

    if (must_scroll) ul.scrollTop = ul.scrollHeight;
  });

  channel.join(); // join the channel.


  var ul = document.getElementById('msg-list');        // list of messages.
  var name = document.getElementById('name');          // name of message sender
  var msg = document.getElementById('msg');            // message input field

  // "listen" for the [Enter] keypress event to send a message:
  msg.addEventListener('keypress', function (event) {
    if (event.keyCode == 13 && msg.value.length > 0) { // don't sent empty msg.
      channel.push('shout', { // send the message to the server on "shout" channel
        message: msg.value    // get message text (value) from msg input field.
      });
      msg.value = '';         // reset the message input field for next message.
    }
  });
}