streaming: don't notify self of own post

src/controllers/api/streaming.ts

@@ -38,6 +38,25 @@ const streamSchema = z.enum([
 
 type Stream = z.infer<typeof streamSchema>;
 
+/** https://docs.joinmastodon.org/methods/streaming/#events-11 */
+interface StreamingEvent {
+  /** https://docs.joinmastodon.org/methods/streaming/#events */
+  event:
+    | 'update'
+    | 'delete'
+    | 'notification'
+    | 'filters_changed'
+    | 'conversation'
+    | 'announcement'
+    | 'announcement.reaction'
+    | 'announcement.delete'
+    | 'status.update'
+    | 'encrypted_message'
+    | 'notifications_merged';
+  payload: string;
+  stream: Stream[];
+}
+
 const LIMITER_WINDOW = Time.minutes(5);
 const LIMITER_LIMIT = 100;
 
@@ -73,18 +92,14 @@ const streamingController: AppController = async (c) => {
 
   const policy = pubkey ? new MuteListPolicy(pubkey, await Storages.admin()) : undefined;
 
-  function send(name: string, payload: object) {
+  function send(e: StreamingEvent) {
     if (socket.readyState === WebSocket.OPEN) {
-      debug('send', name, JSON.stringify(payload));
-      socket.send(JSON.stringify({
-        event: name,
-        payload: JSON.stringify(payload),
-        stream: [stream],
-      }));
+      debug('send', e.event, e.payload);
+      socket.send(JSON.stringify(e));
     }
   }
 
-  async function sub(type: string, filters: NostrFilter[], render: (event: NostrEvent) => Promise<unknown>) {
+  async function sub(filters: NostrFilter[], render: (event: NostrEvent) => Promise<StreamingEvent | undefined>) {
     try {
       for await (const msg of pubsub.req(filters, { signal: controller.signal })) {
         if (msg[0] === 'EVENT') {
@@ -102,7 +117,7 @@ const streamingController: AppController = async (c) => {
           const result = await render(event);
 
           if (result) {
-            send(type, result);
+            send(result);
           }
         }
       }
@@ -118,19 +133,37 @@ const streamingController: AppController = async (c) => {
     const topicFilter = await topicToFilter(stream, c.req.query(), pubkey);
 
     if (topicFilter) {
-      sub('update', [topicFilter], async (event) => {
+      sub([topicFilter], async (event) => {
+        let payload: object | undefined;
+
         if (event.kind === 1) {
-          return await renderStatus(event, { viewerPubkey: pubkey });
+          payload = await renderStatus(event, { viewerPubkey: pubkey });
         }
         if (event.kind === 6) {
-          return await renderReblog(event, { viewerPubkey: pubkey });
+          payload = await renderReblog(event, { viewerPubkey: pubkey });
+        }
+
+        if (payload) {
+          return {
+            event: 'update',
+            payload: JSON.stringify(payload),
+            stream: [stream],
+          };
         }
       });
     }
 
     if (['user', 'user:notification'].includes(stream) && pubkey) {
-      sub('notification', [{ '#p': [pubkey] }], async (event) => {
-        return await renderNotification(event, { viewerPubkey: pubkey });
+      sub([{ '#p': [pubkey] }], async (event) => {
+        if (event.pubkey === pubkey) return; // skip own events
+        const payload = await renderNotification(event, { viewerPubkey: pubkey });
+        if (payload) {
+          return {
+            event: 'notification',
+            payload: JSON.stringify(payload),
+            stream: [stream],
+          };
+        }
       });
       return;
     }