Add canvas interface (#461)

app/(chat)/api/suggestions/route.ts

@@ -0,0 +1,33 @@
+import { auth } from '@/app/(auth)/auth';
+import { getSuggestionsByDocumentId } from '@/db/queries';
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const documentId = searchParams.get('documentId');
+
+  if (!documentId) {
+    return new Response('Not Found', { status: 404 });
+  }
+
+  const session = await auth();
+
+  if (!session || !session.user) {
+    return new Response('Unauthorized', { status: 401 });
+  }
+
+  const suggestions = await getSuggestionsByDocumentId({
+    documentId,
+  });
+
+  const [suggestion] = suggestions;
+
+  if (!suggestion) {
+    return Response.json([], { status: 200 });
+  }
+
+  if (suggestion.userId !== session.user.id) {
+    return new Response('Unauthorized', { status: 401 });
+  }
+
+  return Response.json(suggestions, { status: 200 });
+}