FIX to Error in [1:56:03]: Youtube Video: Build a SaaS AI Platform with Next.js 13, React, Tailwind, Prisma, Stripe | Full Tutorial 2023

route.ts

import { auth } from "@clerk/nextjs";
import { NextResponse } from "next/server";

// Old way (v3)
// import { Configuration, OpenAIApi } from "openai"

// New way (v4)
import OpenAI from "openai"

const openai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

export async function POST (
  req: Request
) {
  try {
    const { userId } = auth();
    const body = await req.json()
    const { messages } = body

    // if no userid, return unauthorized 401
    if (!userId) 
      return new NextResponse("Unauthorized", {status: 401});

    // if no openai configuration api key, return "Open ai api key not configure", status 500
    if (!openai.apiKey)
      return new NextResponse("OpenAI API key not assigned", {status: 500});

    // if no messages from openai, return "Messages are required,status: 400"
    if (!messages)
      return new NextResponse("Messages are required",{status: 400})

    // Old way (v3)
    // const response = await openai.createChatCompletion({
    //     model: "gpt-3.5-turbo",
    //     messages
    // })  
    
    
    // New way (v4)
    const response = await openai.chat.completions.create({
      model: "gpt-3.5-turbo",
      messages
    })
    
    // Old way (v3)
    // return NextResponse.json(response.data.choices[0].message);
    
    // New way (v4)
    return NextResponse.json(response.choices[0].message);

  } catch (error) {
    console.log("[CONVERSATION_ERROR]", error);
    return new NextResponse("Internal Error", {status: 500});
  }
}