feat: add ability to share chats (#594)

app/(chat)/actions.ts

@@ -7,7 +7,9 @@ import { customModel } from '@/lib/ai';
 import {
   deleteMessagesByChatIdAfterTimestamp,
   getMessageById,
+  updateChatVisiblityById,
 } from '@/lib/db/queries';
+import { VisibilityType } from '@/components/visibility-selector';
 
 export async function saveModelId(model: string) {
   const cookieStore = await cookies();
@@ -40,3 +42,13 @@ export async function deleteTrailingMessages({ id }: { id: string }) {
     timestamp: message.createdAt,
   });
 }
+
+export async function updateChatVisibility({
+  chatId,
+  visibility,
+}: {
+  chatId: string;
+  visibility: VisibilityType;
+}) {
+  await updateChatVisiblityById({ chatId, visibility });
+}

app/(chat)/chat/[id]/page.tsx

@@ -18,12 +18,14 @@ export default async function Page(props: { params: Promise<{ id: string }> }) {
 
   const session = await auth();
 
-  if (!session || !session.user) {
-    return notFound();
-  }
+  if (chat.visibility === 'private') {
+    if (!session || !session.user) {
+      return notFound();
+    }
 
-  if (session.user.id !== chat.userId) {
-    return notFound();
+    if (session.user.id !== chat.userId) {
+      return notFound();
+    }
   }
 
   const messagesFromDb = await getMessagesByChatId({
@@ -41,6 +43,8 @@ export default async function Page(props: { params: Promise<{ id: string }> }) {
       id={chat.id}
       initialMessages={convertToUIMessages(messagesFromDb)}
       selectedModelId={selectedModelId}
+      selectedVisibilityType={chat.visibility}
+      isReadonly={session?.user?.id !== chat.userId}
     />
   );
 }

app/(chat)/page.tsx

@@ -20,6 +20,8 @@ export default async function Page() {
       id={id}
       initialMessages={[]}
       selectedModelId={selectedModelId}
+      selectedVisibilityType="private"
+      isReadonly={false}
     />
   );
 }