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import { useEffect } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { connect } from 'react-redux';
import { positionsActions, devicesActions, sessionActions } from './store';
import { useHistory } from 'react-router-dom';
import { useEffectAsync } from './reactHelper';
const displayNotifications = events => {
if ("Notification" in window) {
if (Notification.permission === "granted") {
for (const event of events) {
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 connectSocket = () => {
const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
const socket = new WebSocket(protocol + '//' + window.location.host + '/api/socket');
socket.onclose = () => {
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) {
const server = await response.json();
dispatch(sessionActions.updateServer(server));
}
}, []);
useEffectAsync(async () => {
if (authenticated) {
const response = await fetch('/api/devices');
if (response.ok) {
const devices = await response.json();
dispatch(devicesActions.update(devices));
}
connectSocket();
} else {
const response = await fetch('/api/session');
if (response.ok) {
const user = await response.json();
dispatch(sessionActions.updateUser(user));
} else {
history.push('/login');
}
}
}, [authenticated]);
return null;
}
export default connect()(SocketController);
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