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import React, { useEffect, useRef, useState } from 'react';
import { useDispatch, useSelector, connect } from 'react-redux';
import { Snackbar } from '@material-ui/core';
import { useNavigate } from 'react-router-dom';
import { positionsActions, devicesActions, sessionActions } from './store';
import { useEffectAsync } from './reactHelper';
import { useTranslation } from './common/components/LocalizationProvider';
import { prefixString } from './common/util/stringUtils';
import { snackBarDurationLongMs } from './common/util/duration';
const SocketController = () => {
const dispatch = useDispatch();
const navigate = useNavigate();
const t = useTranslation();
const authenticated = useSelector((state) => !!state.session.user);
const devices = useSelector((state) => state.devices.items);
const socketRef = useRef();
const [events, setEvents] = useState([]);
const [notifications, setNotifications] = useState([]);
const connectSocket = () => {
const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
const socket = new WebSocket(`${protocol}//${window.location.host}/api/socket`);
socketRef.current = socket;
socket.onerror = () => {
setTimeout(() => connectSocket(), 60 * 1000);
};
socket.onmessage = (event) => {
const data = JSON.parse(event.data);
if (data.devices) {
dispatch(devicesActions.update(data.devices));
}
if (data.positions) {
dispatch(positionsActions.update(data.positions));
}
if (data.events) {
setEvents(data.events);
}
};
};
useEffectAsync(async () => {
const response = await fetch('/api/server');
if (response.ok) {
dispatch(sessionActions.updateServer(await response.json()));
} else {
throw Error(await response.text());
}
}, []);
useEffectAsync(async () => {
if (authenticated) {
const response = await fetch('/api/devices');
if (response.ok) {
dispatch(devicesActions.refresh(await response.json()));
} else {
throw Error(await response.text());
}
connectSocket();
return () => {
const socket = socketRef.current;
if (socket) {
socket.close();
}
};
}
const response = await fetch('/api/session');
if (response.ok) {
dispatch(sessionActions.updateUser(await response.json()));
} else {
navigate('/login');
}
return null;
}, [authenticated]);
useEffect(() => {
setNotifications(events.map((event) => ({
id: event.id,
message: `${devices[event.deviceId]?.name}: ${t(prefixString('event', event.type))}`,
show: true,
})));
}, [events, devices, t]);
return (
<>
{notifications.map((notification) => (
<Snackbar
key={notification.id}
open={notification.show}
message={notification.message}
autoHideDuration={snackBarDurationLongMs}
onClose={() => setEvents(events.filter((e) => e.id !== notification.id))}
/>
))}
</>
);
};
export default connect()(SocketController);
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