diff --git a/web/src/App.js b/web/src/App.js
index d8c1c21..b75e643 100644
--- a/web/src/App.js
+++ b/web/src/App.js
@@ -3,44 +3,56 @@ import Container from '@mui/material/Container';
 import Typography from '@mui/material/Typography';
 import Box from '@mui/material/Box';
 import Link from '@mui/material/Link';
-import {useState} from "react";
+import {useEffect, useState} from "react";
 import Subscription from './Subscription';
 import WsConnection from './WsConnection';
 
-function SubscriptionList(props) {
+const SubscriptionList = (props) => {
+    const subscriptions = props.subscriptions;
     return (
         <div className="subscriptionList">
-            {props.subscriptions.map(subscription =>
-                <SubscriptionItem key={subscription.url} subscription={subscription}/>)}
+            {Object.keys(subscriptions).map(id =>
+                <SubscriptionItem
+                    key={id}
+                    subscription={subscriptions[id]}
+                    selected={props.selectedSubscription === subscriptions[id]}
+                    onClick={() => props.handleSubscriptionClick(id)}
+                />)
+            }
         </div>
     );
 }
 
-function SubscriptionItem(props) {
+const SubscriptionItem = (props) => {
     const subscription = props.subscription;
     return (
-        <div>
-            <div>{subscription.shortUrl()}</div>
-        </div>
+        <>
+            <div
+                onClick={props.onClick}
+                style={{ fontWeight: props.selected ? 'bold' : '' }}
+            >
+                {subscription.shortUrl()}
+            </div>
+        </>
     );
 }
 
-function NotificationList(props) {
+const NotificationList = (props) => {
     return (
         <div className="notificationList">
-            {props.notifications.map(notification => <NotificationItem key={notification.id} {...notification}/>)}
-            <div className="date">{props.timestamp}</div>
-            <div className="message">{props.message}</div>
+            {props.notifications.map(notification =>
+                <NotificationItem key={notification.id} notification={notification}/>)}
         </div>
     );
 }
 
 const NotificationItem = (props) => {
+    const notification = props.notification;
     return (
-        <div>
-            <div className="date">{props.time}</div>
-            <div className="message">{props.message}</div>
-        </div>
+        <>
+            <div className="date">{notification.time}</div>
+            <div className="message">{notification.message}</div>
+        </>
     );
 }
 
@@ -67,20 +79,23 @@ const SubscriptionAddForm = (props) => {
 }
 
 const App = () => {
-    const [state, setState] = useState({
-        subscriptions: [],
-    });
-    const notifications = [
-        {id: "qGrfmhp3vK", times: 1645193395, message: "Message 1"},
-        {id: "m4YYjfxwyT", times: 1645193428, message: "Message 2"}
-    ];
-    const addSubscription = (newSubscription) => {
-        const connection = new WsConnection(newSubscription.wsUrl());
+    const [subscriptions, setSubscriptions] = useState({});
+    const [selectedSubscription, setSelectedSubscription] = useState(null);
+    const [connections, setConnections] = useState({});
+    const subscriptionChanged = (subscription) => {
+        setSubscriptions(prev => ({...prev, [subscription.id]: subscription})); // Fake-replace
+    };
+    const addSubscription = (subscription) => {
+        const connection = new WsConnection(subscription, subscriptionChanged);
+        setSubscriptions(prev => ({...prev, [subscription.id]: subscription}));
+        setConnections(prev => ({...prev, [connection.id]: connection}));
         connection.start();
-        setState(prevState => ({
-            subscriptions: [...prevState.subscriptions, newSubscription],
-        }));
-    }
+    };
+    const handleSubscriptionClick = (subscriptionId) => {
+        console.log(`handleSubscriptionClick ${subscriptionId}`)
+        setSelectedSubscription(subscriptions[subscriptionId]);
+    };
+    const notifications = (selectedSubscription !== null) ? selectedSubscription.notifications : [];
     return (
         <Container maxWidth="sm">
             <Box sx={{my: 4}}>
@@ -88,7 +103,11 @@ const App = () => {
                     ntfy
                 </Typography>
                 <SubscriptionAddForm onSubmit={addSubscription}/>
-                <SubscriptionList subscriptions={state.subscriptions}/>
+                <SubscriptionList
+                    subscriptions={subscriptions}
+                    selectedSubscription={selectedSubscription}
+                    handleSubscriptionClick={handleSubscriptionClick}
+                />
                 <NotificationList notifications={notifications}/>
             </Box>
         </Container>
diff --git a/web/src/Subscription.js b/web/src/Subscription.js
index 7b517d4..1222ee2 100644
--- a/web/src/Subscription.js
+++ b/web/src/Subscription.js
@@ -1,15 +1,26 @@
 import {topicUrl, shortTopicUrl, topicUrlWs} from './utils';
 
 export default class Subscription {
-    url = '';
+    id = '';
     baseUrl = '';
     topic = '';
     notifications = [];
+    lastActive = null;
     constructor(baseUrl, topic) {
-        this.url = topicUrl(baseUrl, topic);
+        this.id = topicUrl(baseUrl, topic);
         this.baseUrl = baseUrl;
         this.topic = topic;
     }
+    addNotification(notification) {
+        if (notification.time === null) {
+            return;
+        }
+        this.notifications.push(notification);
+        this.lastActive = notification.time;
+    }
+    url() {
+        return this.id;
+    }
     wsUrl() {
         return topicUrlWs(this.baseUrl, this.topic);
     }
diff --git a/web/src/WsConnection.js b/web/src/WsConnection.js
index c9d7eb3..4e9dfaf 100644
--- a/web/src/WsConnection.js
+++ b/web/src/WsConnection.js
@@ -1,28 +1,47 @@
 
 export default class WsConnection {
-    constructor(url) {
-        this.url = url;
+    id = '';
+    constructor(subscription, onNotification) {
+        this.id = subscription.id;
+        this.subscription = subscription;
+        this.onNotification = onNotification;
         this.ws = null;
     }
     start() {
-        const socket = new WebSocket(this.url);
-        socket.onopen = function(e) {
-            console.log(this.url, "[open] Connection established");
+        const socket = new WebSocket(this.subscription.wsUrl());
+        socket.onopen = (event) => {
+            console.log(this.id, "[open] Connection established");
+        }
+        socket.onmessage = (event) => {
+            console.log(this.id, `[message] Data received from server: ${event.data}`);
+            try {
+                const data = JSON.parse(event.data);
+                const relevantAndValid =
+                    data.event === 'message' &&
+                    'id' in data &&
+                    'time' in data &&
+                    'message' in data;
+                if (!relevantAndValid) {
+                    return;
+                }
+                console.log('adding')
+                this.subscription.addNotification(data);
+                this.onNotification(this.subscription);
+            } catch (e) {
+                console.log(this.id, `[message] Error handling message: ${e}`);
+            }
         };
-        socket.onmessage = function(event) {
-            console.log(this.url, `[message] Data received from server: ${event.data}`);
-        };
-        socket.onclose = function(event) {
+        socket.onclose = (event) => {
             if (event.wasClean) {
-                console.log(this.url, `[close] Connection closed cleanly, code=${event.code} reason=${event.reason}`);
+                console.log(this.id, `[close] Connection closed cleanly, code=${event.code} reason=${event.reason}`);
             } else {
-                console.log(this.url, `[close] Connection died`);
+                console.log(this.id, `[close] Connection died`);
                 // e.g. server process killed or network down
                 // event.code is usually 1006 in this case
             }
         };
-        socket.onerror = function(error) {
-            console.log(this.url, `[error] ${error.message}`);
+        socket.onerror = (event) => {
+            console.log(this.id, `[error] ${event.message}`);
         };
         this.ws = socket;
     }