Emojis, formatting, clear all

web/src/app/Subscription.js

@@ -1,14 +1,18 @@
-import {topicUrl, shortTopicUrl, topicUrlWs} from './utils';
+import {shortTopicUrl, topicUrl} from './utils';
 
 export default class Subscription {
     constructor(baseUrl, topic) {
         this.id = topicUrl(baseUrl, topic);
         this.baseUrl = baseUrl;
         this.topic = topic;
-        this.notifications = new Map();
+        this.notifications = new Map(); // notification ID -> notification object
+        this.deleted = new Set(); // notification IDs
     }
 
     addNotification(notification) {
+        if (this.notifications.has(notification.id) || this.deleted.has(notification.id)) {
+            return this;
+        }
         this.notifications.set(notification.id, notification);
         return this;
     }
@@ -18,6 +22,21 @@ export default class Subscription {
         return this;
     }
 
+    deleteNotification(notificationId) {
+        this.notifications.delete(notificationId);
+        this.deleted.add(notificationId);
+        return this;
+    }
+
+    deleteAllNotifications() {
+        console.log(this.notifications);
+        for (const [id] of this.notifications) {
+            console.log(`delete ${id}`);
+            this.deleteNotification(id);
+        }
+        return this;
+    }
+
     getNotifications() {
         return Array.from(this.notifications.values());
     }