Avatar defaults and colors

ts/util/isSameAvatarData.ts

@@ -0,0 +1,20 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { AvatarDataType } from '../types/Avatar';
+
+export function isSameAvatarData(
+  a?: AvatarDataType,
+  b?: AvatarDataType
+): boolean {
+  if (!a || !b) {
+    return false;
+  }
+  if (a.buffer && b.buffer) {
+    return a.buffer === b.buffer;
+  }
+  if (a.imagePath && b.imagePath) {
+    return a.imagePath === b.imagePath;
+  }
+  return a.id === b.id;
+}