1 files changed, 61 insertions, 0 deletions
diff --git a/modern/src/SocketController.js b/modern/src/SocketController.js
new file mode 100644
index 00000000..b89845f2
--- /dev/null
+++ b/modern/src/SocketController.js
@@ -0,0 +1,61 @@
+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);