Moves conversation.getProps out of models

Co-authored-by: Scott Nonnenberg <scott@signal.org>

ts/util/migrateColor.ts

@@ -2,8 +2,9 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import { sample } from 'lodash';
-import type { AvatarColorType } from '../types/Colors';
 import { AvatarColors } from '../types/Colors';
+import type { ConversationAttributesType } from '../model-types';
+import type { AvatarColorType, CustomColorType } from '../types/Colors';
 
 const NEW_COLOR_NAMES = new Set(AvatarColors);
 
@@ -14,3 +15,20 @@ export function migrateColor(color?: string): AvatarColorType {
 
   return sample(AvatarColors) || AvatarColors[0];
 }
+
+export function getCustomColorData(conversation: ConversationAttributesType): {
+  customColor?: CustomColorType;
+  customColorId?: string;
+} {
+  if (conversation.conversationColor !== 'custom') {
+    return {
+      customColor: undefined,
+      customColorId: undefined,
+    };
+  }
+
+  return {
+    customColor: conversation.customColor,
+    customColorId: conversation.customColorId,
+  };
+}