refactor: update chat route to use new AI SDK and improve streaming response handling

Author: Rayandri

app/api/chat/route.ts

@@ -1,28 +1,17 @@
-import { OpenAIStream, StreamingTextResponse } from "ai"
-import OpenAI from "openai"
+import { openai } from "@ai-sdk/openai"
+import { streamText } from "ai"
 
-// Create an OpenAI API client
-const openai = new OpenAI({
-  apiKey: process.env.OPENAI_API_KEY,
-})
+// Allow streaming responses up to 30 seconds
+export const maxDuration = 30
 
 export async function POST(req: Request) {
-  // Extract the `messages` from the body of the request
   const { messages } = await req.json()
 
-  // Request the OpenAI API for the response based on the prompt
-  const response = await openai.chat.completions.create({
-    model: "gpt-4o-mini",
-    stream: true,
-    messages: messages,
+  const result = streamText({
+    model: openai("gpt-4o-mini"),
+    messages,
   })
 
-  // Convert the response into a friendly text-stream
-  const stream = OpenAIStream(response)
-
-  // Respond with the stream
-  return new StreamingTextResponse(stream)
+  return result.toDataStreamResponse()
 }
 
-
-