code/static: Add frontend layer to the code example

master
ALI Hamza 2019-09-25 16:03:29 +07:00
parent 803f64c0d8
commit 9e05b41888
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5 changed files with 438 additions and 7 deletions

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@import url('https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap');
body {
justify-content: center;
align-items: center;
background-color: #19180A;
width: 100vw;
height: 100vh;
padding: 0;
margin: 0;
font-family: 'Open Sans', sans-serif;
display: flex;
}
#snackbar {
visibility: hidden;
min-width: 250px;
margin-left: -125px;
background-color: #4D5359;
color: #BBC4FF;
text-align: center;
border-radius: 4px;
padding: 16px;
position: fixed;
z-index: 2;
left: 50%;
bottom: 30px;
font-size: 15px;
}
#snackbar.snackshow {
visibility: visible;
-webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
animation: fadein 0.5s, fadeout 0.5s 2.5s;
}
.container {
display: flex;
flex-wrap: wrap;
justify-content: space-between;
margin: 32px;
width: 90%;
height: 90%;
}
.messages {
width: 82%;
height: 80%;
overflow-y: scroll;
border-radius: 4px;
background-color: #4D5359;
}
.messages > div {
padding: 20px;
}
.message hr {
border: none;
border-bottom: 1px solid transparent;
border-bottom-color: #6c6882;
margin: 14px 0;
}
.message .new{
border-bottom-color: #BA5C5C;
}
.message .author {
line-height: 24px;
line-height: 24px;
color: #AAB3FF;
display: inline;
font-weight: bold;
}
.message .timestamp {
line-height: 24px;
color: #888888;
display: inline;
font-size: 12px;
}
.message .content {
color: #C9CEB1;
}
.users {
width: 15%;
height: 80%;
border-radius: 4px;
background-color: #4D5359;
background: -moz-linear-gradient(left, #4d5359 0%, #324a59 100%);
background: -webkit-linear-gradient(left, #4d5359 0%,#324a59 100%);
background: linear-gradient(to bottom, #4d5359 0%,#324a59 100%);
font-weight: 200px;
text-align: center;
overflow-y: scroll;
}
.users h3 {
color: #EAF0CE;
font-weight: 100px;
}
.users p {
text-align: left;
color: #AAB3FF;
margin: 16px 6%;
padding: 3px 9%;
border-left: 4px solid #EAF0CE;
background-color: #EAF0CE22;
text-overflow: ellipsis;
overflow-x: hidden;
white-space: nowrap;
}
.chat {
display: flex;
align-items: center;
width: 96%;
height: 8%;
padding: 9px;
border-radius: 8px;
background-color: #4d5359;
}
.primary {
width: 100%;
background: -moz-linear-gradient(left, #4d5359 0%, #324a59 100%);
background: -webkit-linear-gradient(left, #4d5359 0%,#324a59 100%);
background: linear-gradient(to bottom, #4d5359 0%,#324a59 100%);
padding: 12px 32px 12px;
}
input {
font-family: Helvetica;
font-weight: 300;
width: 100%;
line-height: 2.2rem;
font-size: 1.1rem;
background-color: transparent;
border: none;
outline: none;
color: #AAB3FF;
padding: 0;
margin: 0;
}
input::placeholder{
color: #999;
}
button {
padding: 0;
background: none;
border: none;
outline: none;
}
i {
font-size: 22px;
transition: color 0.25s;
color: #AAB3FF;
}
i:hover {
color: #EAF0CE;
}
.modal {
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
background-color: #00000088;
animation-name: animatetop;
animation-duration: 0.6s;
}
.modal-content {
color: #AAB3FF;
position: relative;
background-color: #324a59;
margin: auto;
padding: 18px;
padding-bottom: 36px;
border-radius: 4px;
width: 60%;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
-webkit-animation-name: animatetop;
-webkit-animation-duration: 0.6s;
}
.modal-content h1 {
padding: 18px 0;
}
@-webkit-keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}
@keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}
@-webkit-keyframes fadein {
from {bottom: 0; opacity: 0;}
to {bottom: 30px; opacity: 1;}
}
@keyframes fadein {
from {bottom: 0; opacity: 0;}
to {bottom: 30px; opacity: 1;}
}
@-webkit-keyframes fadeout {
from {bottom: 30px; opacity: 1;}
to {bottom: 0; opacity: 0;}
}
@keyframes fadeout {
from {bottom: 30px; opacity: 1;}
to {bottom: 0; opacity: 0;}
}

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<head> <head>
<meta charset="UTF-8"> <meta charset="UTF-8">
<title>Go Chat Application</title> <title>Go Chat Application</title>
<link rel="stylesheet" type="text/css" href="/css/style.css">
<link rel="stylesheet" type="text/css" href="https://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css">
</head> </head>
<div id="snackbar">Warning: This is some message.</div>
<body> <body>
<div id="modal" class="modal">
<div class="modal-content">
<h1>Enter a username:</h1>
<div class="chat">
<input type="text" id="nickI" placeholder="Nickname">
<button type="submit" id="nickB"><i class="icon ion-android-arrow-forward"></i></button>
</input>
</div>
</div>
</div>
<div class="container">
<div class="messages">
<div id="messages">
</div>
</div>
<div class="users" id="users">
<h3>Online Users</h3>
</div>
<div class="chat primary">
<input type="text" id="chatI" placeholder="Enter your message">
<button type="submit" id="chatB"><i class="icon ion-android-arrow-forward"></i></button>
</input>
</div>
</div>
<script src="/js/index.js"></script>
</body> </body>
</html> </html>

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//Saved nickname from previous usage
let nickname = window.localStorage.getItem("nickname");
//Nickname button and input
let nickI = document.getElementById("nickI");
let nickB = document.getElementById("nickB");
if (nickname != null) {
nickI.value = nickname;
}
//Chatting button and input
let chatI = document.getElementById("chatI");
let chatB = document.getElementById("chatB");
let registered = false;
let modal = document.getElementById("modal");
//Gets websocket url by replacing http with ws and https with wss, and appending /websocket to the host
let protocol = location.protocol == "http:" ? "ws:" : "wss:";
let url = protocol + "//" + location.host + "/websocket";
let ws = new WebSocket(url);
ws.onopen = function() {
modal.style.display = "block";
nickI.focus();
}
ws.onmessage = function(info) {
let data = JSON.parse(info.data);
console.log(data);
if(!data.success) {
toast("Error: " + data.content);
return;
}
if (!registered) {
registered = true;
window.localStorage.setItem("nickname", nickname);
modal.style.display = "none";
chatI.focus()
let users = data.content;
for(let i = 0; i < users.length; i++) {
userJoin(users[i]);
}
return;
}
newMessage(data);
}
/*
* Message receive handling
*/
function newMessage(data) {
switch(data.type) {
case "join":
userJoin(data.content);
break;
case "leave":
userLeave(data.content);
break;
case "message":
chatMessage(data.sender, data.content, data.date)
}
}
function chatMessage(sender, content, date) {
let msg = create("div", "message");
let hr = create("hr", "seperator");
let author = create("div", "author");
author.innerText = sender;
let timestamp = create("div", "timestamp");
timestamp.innerText = dateToString(new Date(date));
let text = create("div", "content");
text.innerText = content;
msg.append(hr, author, timestamp, text);
//If message scrolling at the bottom, move to bottom again to update
let scroller = document.getElementsByClassName("messages")[0];
let currentScroll = scroller.scrollTop;
let maxScroll = scroller.scrollHeight - scroller.clientHeight;
document.getElementById("messages").append(msg);
if (currentScroll === maxScroll) {
msg.scrollIntoView();
}
}
function userJoin(user) {
let p = document.createElement("p");
p.className = user;
p.innerText = user;
document.getElementById("users").appendChild(p);
}
function userLeave(user) {
users = document.getElementById("users");
users.removeChild(users.getElementsByClassName(user)[0]);
}
/*
* Registration
*/
function register() {
let nick = nickI.value;
if (nick.trim().length == 0) return;
nickname = nick;
ws.send(nick);
}
nickI.onkeydown = function(ev) {
if(ev.key !== "Enter") {
return;
}
register();
}
nickB.onclick = function() {
register();
}
/**
* Message sending
*/
chatI.onkeydown = function(ev) {
if(ev.key !== "Enter") {
return;
}
if(chatI.value.trim().length == 0) return;
ws.send(chatI.value);
chatI.value = "";
}
nickB.onclick = function() {
if(chatI.value.trim().length == 0) return;
ws.send(chatI.value);
chatI.value = "";
}
/*
* Util functions
*/
function toast(message) {
var x = document.getElementById("snackbar");
x.innerText = message;
x.className = "snackshow";
setTimeout(function(){ x.className = x.className.replace("snackshow", ""); }, 3000);
}
let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
function dateToString(date) {
let year = date.getFullYear();
let month = months[date.getMonth()];
let day = date.getDate();
let hour = date.getHours();
let minute = date.getMinutes();
return ` ${day} ${month} ${year} at ${hour}:${minute}`;
}
function create(name, classes) {
let x = document.createElement(name);
x.className = classes;
return x;
}