Ignore chat effect when older than 48h

src/components/structures/RoomView.tsx

@@ -1364,7 +1364,7 @@ export class RoomView extends React.Component<IRoomProps, IRoomState> {
             if (containsEmoji(ev.getContent(), effect.emojis) || ev.getContent().msgtype === effect.msgType) {
                 // For initial threads launch, chat effects are disabled see #19731
                 if (!ev.isRelation(THREAD_RELATION_TYPE.name)) {
-                    dis.dispatch({ action: `effects.${effect.command}` });
+                    dis.dispatch({ action: `effects.${effect.command}`, event: ev });
                 }
             }
         });

src/components/views/elements/EffectsOverlay.tsx

@@ -8,6 +8,7 @@ Please see LICENSE files in the repository root for full details.
  */
 import React, { FunctionComponent, useEffect, useRef } from "react";
 import { logger } from "matrix-js-sdk/src/logger";
+import { MatrixEvent } from "matrix-js-sdk/src/matrix";
 
 import dis from "../../../dispatcher/dispatcher";
 import ICanvasEffect from "../../../effects/ICanvasEffect";
@@ -44,9 +45,10 @@ const EffectsOverlay: FunctionComponent<IProps> = ({ roomWidth }) => {
                 canvasRef.current.height = UIStore.instance.windowHeight;
             }
         };
-        const onAction = (payload: { action: string }): void => {
+        const onAction = (payload: { action: string; event?: MatrixEvent }): void => {
             const actionPrefix = "effects.";
-            if (canvasRef.current && payload.action.startsWith(actionPrefix)) {
+            const isOutdated = isEventOutdated(payload.event);
+            if (canvasRef.current && payload.action.startsWith(actionPrefix) && !isOutdated) {
                 const effect = payload.action.slice(actionPrefix.length);
                 lazyLoadEffectModule(effect).then((module) => module?.start(canvasRef.current!));
             }
@@ -88,3 +90,19 @@ const EffectsOverlay: FunctionComponent<IProps> = ({ roomWidth }) => {
 };
 
 export default EffectsOverlay;
+
+// 48 hours
+// 48h * 60m * 60s * 1000ms
+const OUTDATED_EVENT_THRESHOLD = 48 * 60 * 60 * 1000;
+
+/**
+ * Return true if the event is older than 48h.
+ * @param event
+ */
+function isEventOutdated(event?: MatrixEvent): boolean {
+    if (!event) return false;
+
+    const nowTs = Date.now();
+    const eventTs = event.getTs();
+    return nowTs - eventTs > OUTDATED_EVENT_THRESHOLD;
+}

test/components/views/elements/EffectsOverlay-test.tsx

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2024 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+ * Please see LICENSE files in the repository root for full details.
+ *
+ */
+
+import React from "react";
+import { render, waitFor } from "@testing-library/react";
+
+import dis from "../../../../src/dispatcher/dispatcher";
+import EffectsOverlay from "../../../../src/components/views/elements/EffectsOverlay.tsx";
+
+describe("<EffectsOverlay/>", () => {
+    let isStarted: boolean;
+    beforeEach(() => {
+        isStarted = false;
+        jest.mock("../../../../src/effects/confetti/index.ts", () => {
+            return class Confetti {
+                start = () => {
+                    isStarted = true;
+                };
+                stop = jest.fn();
+            };
+        });
+    });
+
+    afterEach(() => jest.useRealTimers());
+
+    it("should render", () => {
+        const { asFragment } = render(<EffectsOverlay roomWidth={100} />);
+        expect(asFragment()).toMatchSnapshot();
+    });
+
+    it("should start the confetti effect", async () => {
+        render(<EffectsOverlay roomWidth={100} />);
+        dis.dispatch({ action: "effects.confetti" });
+        await waitFor(() => expect(isStarted).toBe(true));
+    });
+
+    it("should start the confetti effect when the event is not outdated", async () => {
+        const eventDate = new Date("2024-09-01");
+        const date = new Date("2024-09-02");
+        jest.useFakeTimers().setSystemTime(date);
+
+        render(<EffectsOverlay roomWidth={100} />);
+        dis.dispatch({ action: "effects.confetti", event: { getTs: () => eventDate.getTime() } });
+        await waitFor(() => expect(isStarted).toBe(true));
+    });
+});

test/components/views/elements/__snapshots__/EffectsOverlay-test.tsx.snap

@@ -0,0 +1,12 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`<EffectsOverlay/> should render 1`] = `
+<DocumentFragment>
+  <canvas
+    aria-hidden="true"
+    height="768"
+    style="display: block; z-index: 999999; pointer-events: none; position: fixed; top: 0px; right: 0px;"
+    width="100"
+  />
+</DocumentFragment>
+`;