server.js

require('dotenv').config();

const express = require('express');
const cors = require('cors');
const bParse = require('body-parser');
const axios = require('axios')
const hotelAPI = require('./hotelAPI.js');
const pythonAPI = require('./pythonAPI.js');
const app = express();


app.use(cors());
app.use(bParse.json());

const PORT = 3000;

app.listen(PORT, () => {
  console.log(`Running Server on ${PORT}`);
});

// app.get('/', async (req, res) => {
//   try {
//     const response = await axios.get('https://catfact.ninja/fact');
//     const data = response.data;
//     console.log('Data sent from backend:', data);
//     res.json(data);
//   } catch (error) {
//     console.error(error);
//     res.status(500).send('Internal server error');
//   }
// });


const messages = [{ "role": "user", "content": "Provide an array of size 3 with popular tourist cities JSON format with the format of city, popular_attractions, city_description" }];
//const messages = [{ "role": "user", "content": "hi" }];
//GPT-3 and DALL-E API Key
const GPTApiKey = process.env.GPT_API_KEY;
const model = 'gpt-3.5-turbo';


const GPTTouristData = {
    "messages": messages,
    "model": model
};


app.get('/GPTLocationInfo', async (req, res) => {
  //console.log("------- GPT IS BEING USED RIGHT NOW -------")
  const response = await axios({
    method: 'post',
    url: 'https://api.openai.com/v1/chat/completions',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': 'Bearer ' + GPTApiKey
    },
    data: GPTTouristData,
  })
  const data = JSON.parse('{ "locations" : ' + String(response.data.choices[0].message.content) + '}');
    //console.log(data);
    res.json(data);
});


app.post('/DALLEPicture', async (req, res) => {
  //console.log("------- DALLE IS BEING USED RIGHT NOW -------")
  body = req.body;
  if (JSON.stringify(body.data) == '{}') {
    res.json({
      url : ''
    });
    return;
  }
  const response = await axios({
    method: 'post',
    url: 'https://api.openai.com/v1/images/generations',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': 'Bearer ' + GPTApiKey,
    },
    data: {
      "prompt": body.data.place,
      'n': 1,
      'size': '512x512'
    },
  })
  const data = response.data.data[0];
  //console.log(data);
  res.json(data);
});

app.use('/hotelAPI', hotelAPI);
app.use('/pythonAPI', pythonAPI);