Node.jsとsocket.ioでLine風チャットを作成してみた4

node.jsとsocket.ioを使用する機会があったので、簡単にチャットを作ることにしました。



作成イメージ

2019-07-07_13h24_10.png



ディレクトリ

2019-07-07_13h12_12.png



完成コード


hello.html

<!DOCTYPE html>

<html>

<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" type="text/css" href="./Line.css">
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.2.0/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="./Line.js"></script>
</head>

<body>
<div class="line">
</div>

<div class="submit">
<input class="form-control" id="msgForm" autocomplete="off" maxlength="120">
<input type="button" id="sendButton" onclick="window.message()" value="送信">
</div>

<div class="file">
<input type="file" name="upfile" id="upfile" accept="image/*" capture="camera" />
<input type="button" onclick="upload()" value="送信">
</div>
</body>

</html>



hello.CSS

.line {

overflow:scroll;
float: left;
width:750px;
height:370px;
padding: 20px 10px;
max-width: 450px;
margin: 15px auto;
font-size: 14px;
background: #7da4cd;
}

.joincomment{
text-align:center;
}

.others{
display: inline-block;
position: relative;
left: -80px;
}

.icon{
display: inline-block;
border-radius: 50%;
width: 40px;
height: 40px;
position: relative;
top:10px;
left:75px;
}

.name{
display: inline-block;
font-size: 12px;
position: relative;
top:-35px;
left:90px;
}

.othercomment {
display: inline-block;
position: relative;
left:10px;
margin: 0 0 0 50px;
padding: 10px;
max-width: 250px;
border-radius: 12px;
background: #edf1ee;
text-align: left;

}

.othercomment:after {
content: "";
display: inline-block;
position: absolute;
top: 3px;
left: -19px;
border: 8px solid transparent;
border-right: 18px solid #edf1ee;
-webkit-transform: rotate(35deg);
transform: rotate(35deg);
}
.othercomment p {
margin: 0;
padding: 0;
}

.mycomment {
margin: 10px 0;
text-align: right;
}
.mycomment p {
display: inline-block;
position: relative;
margin: 0 10px 0 0;
padding: 8px;
max-width: 250px;
border-radius: 12px;
background: #30e852;
font-size: 15px;
}

.mycomment p:after {
content: "";
position: absolute;
top: 3px;
right: -19px;
border: 8px solid transparent;
border-left: 18px solid #30e852;
-webkit-transform: rotate(-35deg);
transform: rotate(-35deg);
}

.submit{
position: relative;
top: 450px;
left: -460px;
}

#msgForm{
width:410px;
}

.file{
position: relative;
top: 460px;
left: -460px;
}



Line.js

var socket = io.connect('http://localhost:3000');

var name = prompt('ニックネームを入力してください', '');
joinUser(name);

socket.on("server_to_client", function (data) {
appendOtherMsg(data.otherMsg, data.name, data.img);
});

socket.on("server_to_client_join", function (data) {
appendJoinMsg(data.join);
});

function appendJoinMsg(message) {
$(".line").append('<div class="joincomment">' + message + '</div><br>');
$('.line').animate({ scrollTop: $('.line')[0].scrollHeight }, 'fast');
}

function appendOtherMsg(message, name, img) {
$(".line").append('<div class="others"><img src="' + img + '" class="icon"><span class="name">' + name + '</span><div class="othercomment"><p>' + message + '</p></div></div><br><br>');
$('.line').animate({ scrollTop: $('.line')[0].scrollHeight }, 'fast');
}

function appendMyMsg(message) {
$(".line").append('<div class="mycomment"><p>' + message + '</p></div><br>');
$('.line').animate({ scrollTop: $('.line')[0].scrollHeight }, 'fast');
}

function message() {
if ($("#msgForm").val() != '') {
var message = $("#msgForm").val();
appendMyMsg(message);
$("#msgForm").val('');
socket.emit("client_to_server", { message: message, name: name });
}
}

function joinUser(name) {
var selectRoom = 1;
socket.emit("client_to_server_join", { room: selectRoom, name: name });
}

function upload() {
var img = $("#upfile").val().split("\\");
socket.emit("
client_to_sever_upload", { img: './image/' + img.pop() });
}

$('#msgForm').keypress(function (e) {
if (e.which == 13 && $("#msgForm").val() != ' ') {
message();
return false;
}
});



chatServer.js

var http = require('http');

var socketio = require('socket.io');
var server = http.createServer(function (req, res) {

}).listen(3000);

var io = socketio.listen(server);

io.sockets.on('connection', function (socket) {
var room = '';
var name = '';
var img = './image/icon.jpg';

socket.on('client_to_server_join', function (data) {
room = data.room;
name = data.name;
socket.join(room);
io.to(room).emit('server_to_client_join', { join: name + "さんが入室しました。" });
});

socket.on('client_to_sever_upload', function (data) {
img = data.img;
});

socket.on('client_to_server', function (data) {
socket.broadcast.to(room).emit('server_to_client', { otherMsg: data.message, name: name, img: img });
});

socket.on('disconnect', function () {
if (name == '') {
console.log("未入室のまま、どこかへ去っていきました。");
} else {
io.to(room).emit('server_to_client_join', { join: name + "さんが退室しました。" });
}
});
});



感想

データベースなしで作成したため、画像の持ち方は悪いと思います。

CSSに関しては得意ではないので、都度修正してください。画面のサイズでUIが変わると思います。

参考程度にしてください。