index.js

import { Configuration, OpenAIApi } from 'openai';
import scraper from './scraper.js';
const configuration = new Configuration({
	organization: "org-yourorg",
	apiKey: "sk-yourapikey",
});

const openai = new OpenAIApi(configuration);

// Define your function
function helloWorld(appendString){
	let hello = "Hello World! " + appendString
	return hello
}

// Get the current time of day
function getTimeOfDay(){
	let date = new Date()
	let hours = date.getHours()
	let minutes = date.getMinutes()
	let seconds = date.getSeconds()
	let timeOfDay = "AM"
	if(hours > 12){
		hours = hours - 12
		timeOfDay = "PM"
	}
	return hours + ":" + minutes + ":" + seconds + " " + timeOfDay
}

// Define your ChatGPT Function
async function callChatGPTWithFunctions(appendString){
	let messages = [{
		role: "system",
		content: "Perform function requests for the user",
	},{
		role: "user",
		content: "Hello, I am a user, I would like to get 5 book recommendations with the keyword 'ChatGPT'",
	}];
	// Step 1: Call ChatGPT with the function name
	let chat = await openai.createChatCompletion({
		model: "gpt-3.5-turbo-0613",
		messages,
		functions: [{
			name: "helloWorld",
			description: "Prints hello world with the string passed to it",
			parameters: {
				type: "object",
				properties: {
					appendString: {
						type: "string",
						description: "The string to append to the hello world message",
					},
				},
				require: ["appendString"],
			}
		},{
			name: "scraper",
			description: "Scraps the book website goodreads for books with the keyword passed to it",
			parameters: {
				type: "object",
				properties: {
					keyword: {
						type: "string",
						description: "The keyword to search for",
					},
				},
				require: ["keyword"],
			}
		},
		{
			name: "getTimeOfDay",
			description: "Get the time of day.",
			parameters: {
				type: "object",
				properties: {
				},
				require: [],
			}
		}],
		function_call: "auto",
	})
	
	let wantsToUseFunction = chat.data.choices[0].finish_reason == "function_call"

	let content = ""
	// Step 2: Check if ChatGPT wants to use a function
	if(wantsToUseFunction){
		// Step 3: Use ChatGPT arguments to call your function
		if(chat.data.choices[0].message.function_call.name == "helloWorld"){
			let argumentObj = JSON.parse(chat.data.choices[0].message.function_call.arguments)
			content = helloWorld(argumentObj.appendString)
			messages.push(chat.data.choices[0].message)
			messages.push({
				role: "function",
				name: "helloWorld", 
				content,
			})
		}
		if(chat.data.choices[0].message.function_call.name == "scraper"){
			let argumentObj = JSON.parse(chat.data.choices[0].message.function_call.arguments)
			content = await scraper(argumentObj.keyword)
			messages.push(chat.data.choices[0].message)
			messages.push({
				role: "function",
				name: "scraper", 
				content,
			})
		}
		if(chat.data.choices[0].message.function_call.name == "getTimeOfDay"){
			content = getTimeOfDay()
			messages.push(chat.data.choices[0].message)
			messages.push({
				role: "function",
				name: "getTimeOfDay", 
				content,
			})
		}
	}

	
	// Step 4: Call ChatGPT again with the function response
	let step4response = await openai.createChatCompletion({
		model: "gpt-3.5-turbo-0613",
		messages,
	});
	console.log(step4response.data.choices[0])
	
}

callChatGPTWithFunctions()