Fix James's nits

functions/src/create-post.ts

@@ -68,13 +68,11 @@ export const createpost = newEndpoint({}, async (req, auth) => {
       const groupData = group.data()
       if (groupData) {
         const postIds = groupData.postIds ?? []
-        if (postIds) {
         postIds.push(postRef.id)
         await groupRef.update({ postIds })
       }
     }
   }
-  }
 
   return { status: 'success', post }
 })

web/components/create-post.tsx

@@ -11,7 +11,7 @@ import { MAX_POST_TITLE_LENGTH } from 'common/post'
 import { postPath } from 'web/lib/firebase/posts'
 import { Group } from 'common/group'
 
-export default function CreatePost(props: { group?: Group }) {
+export function CreatePost(props: { group?: Group }) {
   const [title, setTitle] = useState('')
   const [error, setError] = useState('')
   const [isSubmitting, setIsSubmitting] = useState(false)

web/hooks/use-post.ts

@@ -32,4 +32,8 @@ export const usePosts = (postIds: string[]) => {
   }, [postIds])
 
   return posts
+    .filter(
+      (post, index, self) => index === self.findIndex((t) => t.id === post.id)
+    )
+    .sort((a, b) => b.createdTime - a.createdTime)
 }

web/pages/group/[...slugs]/index.tsx

@@ -56,7 +56,7 @@ import { Tabs } from 'web/components/layout/tabs'
 import { Avatar } from 'web/components/avatar'
 import { Title } from 'web/components/title'
 import { fromNow } from 'web/lib/util/time'
-import CreatePost from 'web/components/create-post'
+import { CreatePost } from 'web/components/create-post'
 
 export const getStaticProps = fromPropz(getStaticPropz)
 export async function getStaticPropz(props: { params: { slugs: string[] } }) {