From 13e3ce6db8fdbcd0a532b768c51a37dfc38db1ba Mon Sep 17 00:00:00 2001
From: Kayne Ruse <kayneruse@gmail.com>
Date: Wed, 17 Mar 2021 16:52:14 +1100
Subject: [PATCH] Chat is working with a local chat-server

---
 client/components/app.jsx                     |  7 +-
 client/components/panels/popup-chat.jsx       | 89 ++++++++++++-------
 .../components/utilities/token-provider.jsx   | 37 +++++++-
 3 files changed, 96 insertions(+), 37 deletions(-)

diff --git a/client/components/app.jsx b/client/components/app.jsx
index c66786e..b0f1c9f 100644
--- a/client/components/app.jsx
+++ b/client/components/app.jsx
@@ -1,6 +1,7 @@
 //react
-import React from 'react';
+import React, { useContext } from 'react';
 import { BrowserRouter, Switch } from 'react-router-dom';
+import { TokenContext } from './utilities/token-provider';
 
 //library components
 import LazyRoute from './lazy-route';
@@ -15,6 +16,8 @@ import Footer from './panels/footer';
 import PopupChat from './panels/popup-chat';
 
 const App = props => {
+	const authTokens = useContext(TokenContext);
+
 	//default render
 	return (
 		<BrowserRouter>
@@ -33,7 +36,7 @@ const App = props => {
 
 					<LazyRoute path='*' component={() => import('./pages/not-found')} />
 				</Switch>
-				<PopupChat />
+				{ authTokens.accessToken ? <PopupChat /> : <></> }
 				<Footer />
 		</BrowserRouter>
 	);
diff --git a/client/components/panels/popup-chat.jsx b/client/components/panels/popup-chat.jsx
index 4c57d5c..c7547b1 100644
--- a/client/components/panels/popup-chat.jsx
+++ b/client/components/panels/popup-chat.jsx
@@ -1,38 +1,38 @@
-import React, { useState, useRef } from 'react';
-//import { io } from 'socket.io-client';
+import React, { useState, useEffect, useRef, useContext } from 'react';
+import { TokenContext } from '../utilities/token-provider';
+import { io } from 'socket.io-client';
 
 import '../../styles/popup-chat.css';
 
-//const socket = io(`${process.env.CHAT_URI}/chat`);
+const socket = io(`${process.env.CHAT_URI}/chat`);
 
 const PopupChat = props => {
 	const [open, setOpen] = useState(false);
-	const [chatlog, setChatlog] = useState([
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '},
-		{ username: 'foo', text: 'bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar '}
-	]);
+	const [chatlog, setChatlog] = useState([]);
 
 	const inputRef = useRef();
+	const sendRef = useRef();
+	const endRef = useRef();
+
+	const authTokens = useContext(TokenContext);
+
+	const pushChatlog = line => setChatlog(prevChatlog => [...prevChatlog, line]);
+
+	useEffect(() => {
+		socket.on('message', message => pushChatlog(message));
+		socket.on('disconnect', reason => pushChatlog({ emphasis: true, text: 'Lost connection' }));
+	}, []);
+
+	useEffect(() => {
+		if (open) {
+			endRef.current.scrollIntoView();
+		}
+	}, [chatlog, open]);
 
 	if (!open) {
 		return (
 			<div className='chat'>
-				<button type='button' className='open' onClick={() => handleOpen(setOpen)}>Open Chat</button>
+				<button type='button' className='open' onClick={() => authTokens.tokenCallback(accessToken => handleOpen(setOpen, accessToken))}>Open Chat</button>
 			</div>
 		);
 	}
@@ -41,32 +41,57 @@ const PopupChat = props => {
 		<div className='chat'>
 			<div className='log'>
 				<ul className='scrollable'>
-					{chatlog.map((line, index) => <li key={index} className='line'><span className='username'>{line.username}: </span><span className='text'>{line.text}</span></li>)}
+					{chatlog.map(processLine)}
+					<li ref={endRef} />
 				</ul>
 			</div>
-			<input type='text' className='input' placeholder='message' ref={inputRef}></input>
-			<button type='button' className='send' onClick={() => handleSend(inputRef)}>Send</button>
+			<input type='text' className='input' placeholder='message' onKeyPress={evt => evt.key == 'Enter' ? sendRef.current.click() : ''} ref={inputRef} />
+			<button type='button' className='send' onClick={() => authTokens.tokenCallback(accessToken => handleSend(inputRef, pushChatlog, authTokens.getPayload().username, accessToken))} ref={sendRef}>Send</button>
 			<button type='button' className='close' onClick={() => handleClose(setOpen)}>Close Chat</button>
 		</div>
 	);
 };
 
-const handleOpen = setOpen => {
+//handlers
+const handleOpen = (setOpen, accessToken) => {
 	setOpen(true);
 
-	//TODO
+	socket.emit('open chat', {
+		accessToken
+	});
 };
 
 const handleClose = setOpen => {
 	setOpen(false);
-
-	//TODO
 };
 
-const handleSend = inputRef => {
-	//TODO
+const handleSend = (inputRef, pushChatlog, username, accessToken) => {
+	socket.emit('message', {
+		accessToken,
+		text: inputRef.current.value
+	});
+
+	if (!inputRef.current.value.startsWith('/')) {
+		pushChatlog({ username: username, text: inputRef.current.value });
+	}
 
 	inputRef.current.value = '';
 };
 
+//render each line
+const processLine = (line, index) => {
+	let content = <span>{line.username ? <span className='username'>{line.username}: </span> : ''}{line.text ? <span className='text'>{line.text}</span> : ''}</span>;
+
+	//decorators
+	if (line.emphasis) {
+		content = <em>{content}</em>;
+	}
+
+	if (line.strong) {
+		content = <strong>{content}</strong>;
+	}
+
+	return<li key={index} className='line'>{content}</li>;
+};
+
 export default PopupChat;
\ No newline at end of file
diff --git a/client/components/utilities/token-provider.jsx b/client/components/utilities/token-provider.jsx
index 71cdd46..5cb6bc3 100644
--- a/client/components/utilities/token-provider.jsx
+++ b/client/components/utilities/token-provider.jsx
@@ -11,7 +11,7 @@ const TokenProvider = props => {
 	useEffect(() => {
 		setAccessToken(localStorage.getItem("accessToken") || '');
 		setRefreshToken(localStorage.getItem("refreshToken") || '');
-	}, [])
+	}, []);
 
 	useEffect(() => {
 		localStorage.setItem("accessToken", accessToken);
@@ -79,11 +79,42 @@ const TokenProvider = props => {
 
 	//access the refreshed token via callback
 	const tokenCallback = async (cb) => {
-		//TODO: tokenCallback
+		//if expired (10 minutes, normally)
+		const expired = new Date(decode(accessToken).exp * 1000) < Date.now();
+
+		if (expired) {
+			//ping the auth server for a new token
+			const response = await fetch(`${process.env.AUTH_URI}/auth/token`, {
+				method: 'POST',
+				headers: {
+					'Content-Type': 'application/json',
+					'Access-Control-Allow-Origin': '*'
+				},
+				body: JSON.stringify({
+					token: refreshToken
+				})
+			});
+
+			//any errors, throw them
+			if (!response.ok) {
+				throw `${response.status}: ${await response.text()}`;
+			}
+
+			//save the new auth stuff (setting bearer as well)
+			const newAuth = await response.json();
+
+			setAccessToken(newAuth.accessToken);
+			setRefreshToken(newAuth.refreshToken);
+
+			//finally
+			return cb(newAuth.accessToken);
+		} else {
+			return cb(accessToken);
+		}
 	};
 
 	return (
-		<TokenContext.Provider value={{ accessToken, refreshToken, setAccessToken, setRefreshToken, tokenFetch, getPayload: () => decode(accessToken) }}>
+		<TokenContext.Provider value={{ accessToken, refreshToken, setAccessToken, setRefreshToken, tokenFetch, tokenCallback, getPayload: () => decode(accessToken) }}>
 			{props.children}
 		</TokenContext.Provider>
 	)