From 3f62287bc7052d81778a6c8b3a0b5682c18c4f62 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 8 Sep 2023 00:24:58 +0200
Subject: room watches

---
 client-web/source/helper.ts | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'client-web/source/helper.ts')

diff --git a/client-web/source/helper.ts b/client-web/source/helper.ts
index ecfdf95..49c36fa 100644
--- a/client-web/source/helper.ts
+++ b/client-web/source/helper.ts
@@ -77,3 +77,10 @@ export function display_filesize(n: number): string {
     if (n > 1000) return (n / 1000).toFixed(1) + "kB"
     return n.toString() + "B"
 }
+
+export class EventEmitter<E> {
+    private handlers: Set<(e: E) => unknown> = new Set()
+    public dispatch(e: E) { this.handlers.forEach(h => h(e)) }
+    public add_listener(listener: (e: E) => unknown) { this.handlers.add(listener) }
+    public remove_listener(listener: (e: E) => unknown) { this.handlers.delete(listener) }
+}
-- 
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