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import { Component } from 'react';
import { connect } from 'react-redux';
import { updateDevices, updatePositions } from './actions';
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);
}
});
}
}
};
class SocketController extends Component {
connectSocket() {
const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
const socket = new WebSocket(protocol + '//' + window.location.host + '/api/socket');
socket.onclose = () => {
setTimeout(() => this.connectSocket(), 60 * 1000);
};
socket.onmessage = (event) => {
const data = JSON.parse(event.data);
if (data.devices) {
this.props.dispatch(updateDevices(data.devices));
}
if (data.positions) {
this.props.dispatch(updatePositions(data.positions));
}
if (data.events) {
displayNotifications(data.events);
}
}
}
componentDidMount() {
fetch('/api/devices').then(response => {
if (response.ok) {
response.json().then(devices => {
this.props.dispatch(updateDevices(devices));
});
}
this.connectSocket();
});
}
render() {
return null;
}
}
export default connect()(SocketController);
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