Normalize UUID in ConversationModel.initialize

ts/models/conversations.ts

@@ -17,6 +17,7 @@ import type {
   WhatIsThis,
 } from '../model-types.d';
 import { getInitials } from '../util/getInitials';
+import { normalizeUuid } from '../util/normalizeUuid';
 import type { AttachmentType } from '../types/Attachment';
 import { isGIF } from '../types/Attachment';
 import type { CallHistoryDetailsType } from '../types/Calling';
@@ -259,6 +260,17 @@ export class ConversationModel extends window.Backbone
   override initialize(
     attributes: Partial<ConversationAttributesType> = {}
   ): void {
+    const uuid = this.get('uuid');
+    const normalizedUuid =
+      uuid && normalizeUuid(uuid, 'ConversationModel.initialize');
+    if (uuid && normalizedUuid !== uuid) {
+      log.warn(
+        'ConversationModel.initialize: normalizing uuid from ' +
+          `${uuid} to ${normalizedUuid}`
+      );
+      this.set('uuid', normalizedUuid);
+    }
+
     if (isValidE164(attributes.id, false)) {
       this.set({ id: UUID.generate().toString(), e164: attributes.id });
     }

ts/test-both/util/normalizeUuid_test.ts

@@ -15,8 +15,9 @@ describe('normalizeUuid', () => {
 
   it("throws if passed a string that's not a UUID", () => {
     assert.throws(
-      () => normalizeUuid('not-uuid-at-all', 'context 3'),
-      'Normalizing invalid uuid: not-uuid-at-all in context "context 3"'
+      () => normalizeUuid('not-UUID-at-all', 'context 3'),
+      'Normalizing invalid uuid: not-UUID-at-all to not-uuid-at-all in ' +
+        'context "context 3"'
     );
   });
 });

ts/util/normalizeUuid.ts

@@ -1,14 +1,17 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import type { UUIDStringType } from '../types/UUID';
 import { isValidUuid } from '../types/UUID';
 import { assert } from './assert';
 
-export function normalizeUuid(uuid: string, context: string): string {
+export function normalizeUuid(uuid: string, context: string): UUIDStringType {
+  const result = uuid.toLowerCase();
+
   assert(
-    isValidUuid(uuid),
-    `Normalizing invalid uuid: ${uuid} in context "${context}"`
+    isValidUuid(uuid) && isValidUuid(result),
+    `Normalizing invalid uuid: ${uuid} to ${result} in context "${context}"`
   );
 
-  return uuid.toLowerCase();
+  return result;
 }