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import { useRef } from 'react';
import { useDispatch, useSelector, connect } from 'react-redux';
import { useHistory } from 'react-router-dom';
import { positionsActions, devicesActions, sessionActions } from './store';
import { useEffectAsync } from './reactHelper';
const displayNotifications = (events) => {
if ('Notification' in window) {
if (Notification.permission === 'granted') {
events.forEach((event) => {
const notification = new Notification(`Event: ${event.type}`);
setTimeout(notification.close.bind(notification), 4 * 1000);
});
} else if (Notification.permission !== 'denied') {
Notification.requestPermission((permission) => {
if (permission === 'granted') {
displayNotifications(events);
}
});
}
}
};
const SocketController = () => {
const dispatch = useDispatch();
const history = useHistory();
const authenticated = useSelector((state) => !!state.session.user);
const socketRef = useRef();
const connectSocket = () => {
const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
const socket = new WebSocket(`${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) {
displayNotifications(data.events);
}
};
};
useEffectAsync(async () => {
const response = await fetch('/api/server');
if (response.ok) {
dispatch(sessionActions.updateServer(await response.json()));
}
}, []);
useEffectAsync(async () => {
if (authenticated) {
const response = await fetch('/api/devices');
if (response.ok) {
dispatch(devicesActions.refresh(await response.json()));
}
connectSocket();
return () => {
const socket = socketRef.current;
if (socket) {
socket.close();
}
}
} else {
const response = await fetch('/api/session');
if (response.ok) {
dispatch(sessionActions.updateUser(await response.json()));
} else {
history.push('/login');
}
}
}, [authenticated]);
return null;
};
export default connect()(SocketController);
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