feat: show call participants in room list (Discord-style)

apps/web/src/utils/validate/index.ts

@@ -0,0 +1,9 @@
+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+export * from "./numberInRange";

apps/web/src/utils/validate/numberInRange.ts

@@ -0,0 +1,18 @@
+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+/**
+ * Validates that a value is
+ * - a number
+ * - in a provided range (inclusive)
+ */
+export const validateNumberInRange =
+    (min: number, max: number) =>
+    (value?: number): boolean => {
+        return typeof value === "number" && !(isNaN(value) || min > value || value > max);
+    };