example function in node js to call the chat gpt api with a function call

chat-gpt-turbo-function-example.js

const config = require('./config')
const { Configuration, OpenAIApi } = require("openai");
const configuration = new Configuration({
  apiKey: config.openai,
});
const openai = new OpenAIApi(configuration);


const businessType = async (businessType) => {
  console.log("businessType:", businessType)
  return 'cybersecurity'
}

setTimeout(async () => {
  const text = `please respond to my email`
  const output = await openai.createChatCompletion({
    model: "gpt-3.5-turbo-0613",
    messages: [
      { role: 'system', content: `Write an email subject given the business type. you may use emoji.` },
      { role: 'user', content: `business type is cybersecurity` }
    ],
    functions: [{
      name: 'businessType',
      description: 'get the email context like the type of business we are writing the email for',
      parameters: {
        type: "object",
        properties: {
          businessType: {
            type: "string",
            description: "the type of business we are writing the email for",
          }
        },
        required: ["businessType"]
      }
    }],
    function_call: 'auto',
    temperature: 1,
    max_tokens: 200,
    top_p: 1,
    frequency_penalty: 0,
    presence_penalty: 0,
  });
  const out = output?.data?.choices[0]
  if (out.finish_reason === 'function_call') {
    if (out?.message?.function_call?.name === 'businessType') {
      const j = JSON.parse(out?.message?.function_call?.arguments)
      console.log("j:", j)

    }
  } else {
    console.log("no function call:", out.message);
  }
})