bug fixes, and performance improvements, and drawer

server/utils/events.ts

@@ -1,5 +1,9 @@
+import { createLiveTopicText } from './live-topic-text';
+
+type StreamSink = Pick<ReadableStreamDefaultController, 'enqueue'>;
+
 interface StreamConnection {
-    controller: ReadableStreamDefaultController;
+    controller: StreamSink;
     lastPing: number;
     subscribedAt: number;
 }
@@ -91,9 +95,13 @@ export const userEvents = {
 };
 
 const topicSubscribers = new Map<string, Set<StreamConnection>>();
+const liveTopicText = createLiveTopicText();
 
 export const topicEvents = {
-    subscribe(topicId: string, controller: ReadableStreamDefaultController) {
+    applyLiveText: liveTopicText.apply,
+    clearLiveText: liveTopicText.removeMessage,
+
+    subscribe(topicId: string, controller: StreamSink) {
         if (!topicSubscribers.has(topicId)) {
             topicSubscribers.set(topicId, new Set());
         }
@@ -120,7 +128,7 @@ export const topicEvents = {
         (conn as any).pingInterval = pingInterval;
     },
 
-    unsubscribe(topicId: string, controller: ReadableStreamDefaultController) {
+    unsubscribe(topicId: string, controller: StreamSink) {
         const connections = topicSubscribers.get(topicId);
         if (!connections) return;
 
@@ -137,14 +145,14 @@ export const topicEvents = {
     },
 
     async emit(topicId: string, events: Array<{ type: string; payload: any; timestamp?: number }> | { type: string; payload: any; timestamp?: number }) {
-        const connections = topicSubscribers.get(topicId);
-        if (!connections || connections.size === 0) return;
-
         if (!Array.isArray(events)) {
             events = [events];
         }
 
         for (const event of events) {
+            liveTopicText.update(topicId, event);
+            const connections = topicSubscribers.get(topicId);
+            if (!connections || connections.size === 0) continue;
             const timestamp = event.timestamp ?? Date.now();
             const data = `data: ${JSON.stringify({ ...event, timestamp })}\n\n`;