From 8f3c0a1071d2ab13b2a40b496365278cf9990140 Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Wed, 14 Dec 2022 13:06:41 -0600
Subject: [PATCH] Carousel: make `seen` optional, only hit the API if
 features.carouselSeen is supported

---
 app/soapbox/queries/carousels.ts | 15 ++++++++++-----
 app/soapbox/utils/features.ts    |  6 ++++++
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/app/soapbox/queries/carousels.ts b/app/soapbox/queries/carousels.ts
index c908b352a..d6e05798a 100644
--- a/app/soapbox/queries/carousels.ts
+++ b/app/soapbox/queries/carousels.ts
@@ -1,12 +1,12 @@
 import { useMutation, useQuery } from '@tanstack/react-query';
 
-import { useApi } from 'soapbox/hooks';
+import { useApi, useFeatures } from 'soapbox/hooks';
 
 export type Avatar = {
   account_id: string
   account_avatar: string
   acct: string
-  seen: boolean
+  seen?: boolean
 }
 
 const CarouselKeys = {
@@ -36,10 +36,15 @@ function useCarouselAvatars() {
 
 function useMarkAsSeen() {
   const api = useApi();
+  const features = useFeatures();
 
-  return useMutation((account_id: string) => api.post('/api/v1/truth/carousels/avatars/seen', {
-    account_id,
-  }));
+  return useMutation(async (accountId: string) => {
+    if (features.carouselSeen) {
+      await void api.post('/api/v1/truth/carousels/avatars/seen', {
+        account_id: accountId,
+      });
+    }
+  });
 }
 
 export { useCarouselAvatars, useMarkAsSeen };
\ No newline at end of file
diff --git a/app/soapbox/utils/features.ts b/app/soapbox/utils/features.ts
index 9fc226b4e..1927bde2e 100644
--- a/app/soapbox/utils/features.ts
+++ b/app/soapbox/utils/features.ts
@@ -212,6 +212,12 @@ const getInstanceFeatures = (instance: Instance) => {
      */
     carousel: v.software === TRUTHSOCIAL,
 
+    /**
+     * Ability to mark a carousel avatar as "seen."
+     * @see POST /api/v1/truth/carousels/avatars/seen
+     */
+    carouselSeen: v.software === TRUTHSOCIAL,
+
     /**
      * Ability to accept a chat.
      * POST /api/v1/pleroma/chats/:id/accept