Typing notification, user socketId saved to state

server/socket/index.js

@@ -1,6 +1,7 @@
 module.exports = io => {
   io.on('connection', socket => {
     console.log(`A socket connection to the server has been made: ${socket.id}`)
+    socket.broadcast.emit('user connection', socket.id)
 
     socket.on('disconnect', () => {
       console.log(`${socket.id} has disconnected.`)
@@ -9,5 +10,9 @@ module.exports = io => {
     socket.on('message', message => {
       socket.broadcast.emit('message', message)
     })
+
+    socket.on('typing', () => {
+      socket.broadcast.emit('typing')
+    })
   })
 }

src/components/Chat.js

@@ -1,5 +1,7 @@
 import React from 'react'
-import { Form, Row, Col, Button } from 'react-bootstrap'
+import { Form, Row, Col, Button, Card, ListGroup, Image } from 'react-bootstrap'
+//import ScrollToBottom from 'react-scroll-to-bottom'
+import userImage from '../assets/default-user-image.png'
 
 import uuid from 'uuid'
 
@@ -8,20 +10,53 @@ import socket from '../socket'
 class Chat extends React.Component {
   constructor() {
     super()
-    this.state = { text: '', messages: [] }
+    this.state = {
+      text: '',
+      messages: [],
+      user: {},
+    }
     this.handleSubmit = this.handleSubmit.bind(this)
     this.handleChange = this.handleChange.bind(this)
+    this.handleKey = this.handleKey.bind(this)
   }
 
   componentDidMount() {
+    this.scrollToBottom()
+
+    socket.on('typing', () => this.toggleTyping())
     socket.on('message', message => {
       this.addMessage(message)
     })
+    socket.on('user connection', payload =>
+      console.log('a user has logged in:', payload)
+    )
+
+    socket.on('connect', () => {
+      console.log('Connected!')
+      this.setState({ user: { socketId: socket.id } })
+    })
+  }
+
+  componentDidUpdate() {
+    this.scrollToBottom()
+  }
+  scrollToBottom = () => {
+    this.messagesEnd.scrollIntoView({ behavior: 'smooth' })
   }
 
   handleChange(e) {
     this.setState({ [e.target.name]: e.target.value })
   }
+
+  toggleTyping() {
+    if (this.state.typing) return
+    this.setState({ typing: true })
+    setTimeout(() => this.setState({ typing: false }), 2000)
+  }
+
+  handleKey(e) {
+    socket.emit('typing')
+  }
   addMessage(message) {
     const messages = this.state.messages.concat(message)
     this.setState({ messages })
@@ -36,32 +71,59 @@ class Chat extends React.Component {
 
   render() {
     return (
-      <div className="mt-5">
-        <div style={{ height: '30rem' }}>
+      <Card className="mt-5">
+        <Card.Body style={{ height: '60vh' }}>
+          <ListGroup style={{ height: '100%', overflowY: 'hidden' }}>
             {this.state.messages.map(msg => (
-            <div>
+              <ListGroup.Item key={uuid()} className="my-2">
+                <Image
+                  className={`mx-2 ${
+                    socket.id === this.state.user.socketId ? 'float-right' : ''
+                  }`}
+                  style={{ height: '24px' }}
+                  src={userImage}
+                />
                 {msg.userId}: {msg.text}
-            </div>
+              </ListGroup.Item>
             ))}
-        </div>
+            <div
+              style={{ float: 'left', clear: 'both' }}
+              ref={el => {
+                this.messagesEnd = el
+              }}
+            />
+          </ListGroup>
+        </Card.Body>
+        <Card.Body>
           <Form onSubmit={this.handleSubmit}>
             <Form.Group as={Row}>
               <Col xs={9} sm={10}>
                 <Form.Control
                   name="text"
-                autocomplete="off"
+                  autoComplete="off"
                   value={this.state.text}
                   onChange={this.handleChange}
+                  onKeyDown={this.handleKey}
                 />
               </Col>
               <Col xs={1} sm={2}>
-              <Button type="submit" variant="dark" onSubmit={this.handleSubmit}>
+                <Button
+                  type="submit"
+                  variant="dark"
+                  onSubmit={this.handleSubmit}
+                >
                   Send
                 </Button>
               </Col>
             </Form.Group>
           </Form>
-      </div>
+          {this.state.typing ? (
+            <div style={{ height: '2em' }}>Someone is typing...</div>
+          ) : (
+            <div style={{ height: '2em' }} />
+          )}
+        </Card.Body>
+      </Card>
     )
   }
 }

src/socket.js

@@ -2,8 +2,4 @@ import io from 'socket.io-client'
 
 const socket = io(window.location.origin)
 
-socket.on('connect', () => {
-  console.log('Connected!')
-})
-
 export default socket