npm install openai

const openai = require('openai');

const configuration = {
  openai: new openai.Configuration({
    basePath: 'https://ggf906-openai.openai.azure.com/openai/deployments/gpt3', (1)
    apiKey: '3f9f9f99f9f9f9f9f9f9f9f9f9f9f9f', (2)
  }),
};

module.exports = configuration;

const configuration = require('../config/configuration');

class MovieRecommendationsService {
  constructor(openAIApi) {
    this.openai = openAIApi; (1)
  }

  async getMovieRecommendations({ movies }) {
    const completion = await this.openai.createChatCompletion( (2)
      {
        model: 'gpt-3.5-turbo', (3)
        messages: [ (4)
          {
            role: 'system', (5)
            content:
              'Given a list of movies suggest 5 new movies. Reply with only the answer in JSON form and include no other commentary. It is an array of objects called movies with title, director, year and reason.', (6)
          },
          {
            role: 'user', (7)
            content: movies.join(','), (8)
          },
        ],
      },
      {
        headers: {
          'api-key': configuration.openai.apiKey, (9)
        },
        params: {
          'api-version': '2023-03-15-preview', (10)
        },
      }
    );

    return this.extractJSON(completion.data.choices[0].message.content); (11)
  }

  extractJSON(text) {
    const jsonStart = text.indexOf('```json'); (12)
    if (jsonStart === -1) { (13)
      const movies = JSON.parse(text);
      return movies.movies ? movies : { movies }; (14)
    }
    const jsonEnd = text.indexOf('```', jsonStart + 1);
    const json = text.substring(jsonStart + 7, jsonEnd);
    return JSON.parse(json);
  }
}

module.exports = MovieRecommendationsService;

const express = require('express');
const bodyParser = require('body-parser');

...

const MovieRecommendationsService = require('./services/movie-recommendations'); (1)
const configuration = require('./config/configuration'); (1)
const { OpenAIApi } = require('openai'); (1)

const app = express();
app.use(bodyParser.json()); (2)

...

app.put('/post-test', async (req, res) => { (3)
  console.log('Got body:', req.body);
  const recommendations = await new MovieRecommendationsService(
    new OpenAIApi(configuration.openai)
  ).getMovieRecommendations(req.body); (4)
  res.send(recommendations); (5)
});

module.exports = app;

{
  "movies": [
    "The Matrix",
    "Blade Runner",
    "2001: A Space Odyssey"
  ]
}

{
  "movies": [
    {
      "title": "Inception",
      "director": "Christopher Nolan",
      "year": "2010",
      "reason": "mind-bending sci-fi"
    },
    {
      "title": "Interstellar",
      "director": "Christopher Nolan",
      "year": "2014",
      "reason": "visually stunning sci-fi"
    },
    {
      "title": "Ex Machina",
      "director": "Alex Garland",
      "year": "2014",
      "reason": "thought-provoking sci-fi"
    },
    {
      "title": "Blade Runner 2049",
      "director": "Denis Villeneuve",
      "year": "2017",
      "reason": "sequel to Blade Runner"
    },
    {
      "title": "Her",
      "director": "Spike Jonze",
      "year": "2013",
      "reason": "romantic sci-fi"
    }
  ]
}