feat: refactor chat sharing implementation

app/actions.ts

@@ -2,10 +2,9 @@
 
 import { revalidatePath } from 'next/cache'
 import { kv } from '@vercel/kv'
+import { currentUser } from '@clerk/nextjs'
 
 import { type Chat } from '@/lib/types'
-import { currentUser } from '@clerk/nextjs'
-import { nanoid } from '@/lib/utils'
 
 export async function getChats(userId?: string | null) {
   if (!userId) {
@@ -52,9 +51,11 @@ export async function removeChat({ id, path }: { id: string; path: string }) {
   }
 
   const uid = await kv.hget<string>(`chat:${id}`, 'userId')
+
   if (uid !== user.id) {
     throw new Error('Unauthorized')
   }
+
   await kv.del(`chat:${id}`)
   await kv.zrem(`user:chat:${user.id}`, `chat:${id}`)
 
@@ -85,6 +86,16 @@ export async function clearChats() {
   revalidatePath('/')
 }
 
+export async function getSharedChat(id: string) {
+  const chat = await kv.hgetall<Chat>(`chat:${id}`)
+
+  if (!chat || !chat.sharePath) {
+    return null
+  }
+
+  return chat
+}
+
 export async function shareChat(chat: Chat) {
   const user = await currentUser()
 
@@ -92,23 +103,12 @@ export async function shareChat(chat: Chat) {
     throw new Error('Unauthorized')
   }
 
-  const id = nanoid()
-  const createdAt = Date.now()
-
   const payload = {
-    id,
-    title: chat.title,
-    userId: user.id,
-    createdAt,
-    path: `/share/${id}`,
-    chat
+    ...chat,
+    sharePath: `/share/${chat.id}`
   }
 
-  await kv.hmset(`share:${id}`, payload)
-  await kv.zadd(`user:share:${user.id}`, {
-    score: createdAt,
-    member: `share:${id}`
-  })
+  await kv.hmset(`chat:${chat.id}`, payload)
 
   return payload
 }