first commit

common/resources/client/users/queries/use-followed-users.ts

@@ -0,0 +1,32 @@
+import {useQuery} from '@tanstack/react-query';
+import {apiClient} from '@common/http/query-client';
+import {BackendResponse} from '@common/http/backend-response/backend-response';
+import {useAuth} from '@common/auth/use-auth';
+import {User} from '@common/auth/user';
+
+interface Response extends BackendResponse {
+  ids: number[];
+}
+
+export function useFollowedUsers() {
+  const {user} = useAuth();
+  return useQuery({
+    queryKey: ['users', 'followed', 'ids'],
+    queryFn: () => fetchIds(),
+    enabled: !!user,
+  });
+}
+
+export function useIsUserFollowing(user: User) {
+  const {data, isLoading} = useFollowedUsers();
+  return {
+    isLoading,
+    isFollowing: !!data?.ids.includes(user.id),
+  };
+}
+
+function fetchIds() {
+  return apiClient
+    .get<Response>(`users/me/followed-users/ids`)
+    .then(response => response.data);
+}