Salesforceの商談を取得する

import { openai } from "@ai-sdk/openai";
import { streamText, tool } from "ai";
import { z } from "zod";
import { auth0 } from "@/lib/auth0";

export const maxDuration = 60;

export async function POST(req) {
  const { messages } = await req.json();

  const system = `You're a helpful AI agent that helps analyze salesforce data`;

  const response = streamText({
    model: openai("gpt-4o"),
    messages,
    system,
    maxSteps: 10,
    tools: {
      listOpportunities: tool({
        // 商談の一覧を取得するSalesforceツール呼び出し
        description: "Get a list of opportunities from Salesforce",
        parameters: z.object({
          limit: z
            .number()
            .default(10)
            .describe("The maximum number of opportunities to return"),
        }),
        execute: async ({ limit }) => {
          const instanceUrl = process.env.SALESFORCE_INSTANCE_URL;

          const endpoint = `query/?q=${encodeURIComponent(
            `SELECT Id, Name, StageName, CloseDate FROM Opportunity LIMIT ${limit}`
          )}`;
          const url = `${instanceUrl}/services/data/v57.0/${endpoint}`;

          // auth0を呼び出してアクセストークンを取得する
          const { accessToken } = await auth0.getAccessTokenForConnection({
            connection: "sfdc",
          });

          const response = await fetch(url, {
            method: "GET",
            headers: {
              Authorization: `Bearer ${accessToken}`,
              "Content-Type": "application/json",
            },
          });
          return await response.json();
        },
      }),
    },
  });
  return response.toDataStreamResponse();
}

"use client";
import { useChat } from "@ai-sdk/react";
export default function Chat() {
  const { messages, input, handleInputChange, handleSubmit } = useChat();
  return (
    <div className="flex flex-col w-full max-w-3xl py-24 mx-auto stretch text-gray-100">
      {messages.map((message) => (
        <div key={message.id} className="whitespace-pre-wrap">
          {message.role === "user" ? "User: " : "AI: "}
          {message.parts.map((part, i) => {
            switch (part.type) {
              case "text":
                return <div key={`${message.id}-${i}`}>{part.text}</div>;
            }
          })}
        </div>
      ))}
      <form onSubmit={handleSubmit}>
        <input
          className="fixed bottom-0 w-full max-w-3xl p-2 mb-8 border border-zinc-300 rounded shadow-xl"
          value={input}
          placeholder="Say something..."
          onChange={handleInputChange}
        />
      </form>
    </div>
  );
}