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Movie Recommendation System with Node and Express.js
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Book Recommendation System using Node and Express.js

Last Updated : 25 Jul, 2024
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The Book Recommendation System aims to enhance the user's reading experience by suggesting books tailored to their interests and preferences. Leveraging the power of machine learning and natural language processing, the system will analyze user inputs and recommend relevant books from a database. In this project, we will develop a Book Recommendation System using NodeJS and ExpressJS. The system will utilize the OpenAI API for natural language processing to provide personalized book recommendations based on user preferences and input.

Output Preview: Let us have a look at how the final output will look like.


frame_00_delay-01s
Fig:1 Running/Executing the code
frame_45_delay-01s
Fig:2 Type in the desired recommendation
frame_61_delay-01s
Fig:3 Output of the program




Prerequisites:

  • NPM & Node JS
  • React JS
  • Express JS
  • REST API
  • HTML, CSS, and JavaScript

Approach to Create Book Recommendation System:

The Book Recommendation System will include the following functionalities:

  • Input processing: Analyze user preferences and input using the OpenAI API.
  • Book recommendation: Recommend relevant books based on user input and preferences.
  • User interface: Provide a user-friendly interface to interact with the system.

Steps to Create the NodeJS App and Installing Module:

Step 1: Create a new directory for your project and navigate into it:

mkdir book-recommendation
cd book-recommendation

Step 2: Create a server using the following command.

npm init -y

Step 3: Install Dependencies:You'll need to install Express.js and Axios for making HTTP requests:

npm install express axios dotenv

Step 4: Create a .env file, this file will contain your environment variables, including your OpenAI API key.

PORT=3000
OPENAI_API_KEY=your_openai_api_key_here

Step 5: Create Files ie. public/index.html this file will contain the HTML structure for our webpage and public/script.js this file handles the functionality of fetching user input and sending it to the server to get book recommendations using the OpenAI API. The server.js file will contain the NodeJS server code to handle requests and interact with the OpenAI API.

Project Structure:

Screenshot-2024-02-29-130058

The updated dependencies in package.json file will look like:

"dependencies": {
"axios": "^1.6.7",
"dotenv": "^16.4.5",
"express": "^4.18.2",
"openai": "^4.28.4",
}
HTML
<!-- public/index.html --> <!DOCTYPE html> <html lang="en">  <head> 	<meta charset="UTF-8" /> 	<meta name="viewport" 	content="width=device-width, initial-scale=1.0" /> 	<title>Book Recommendation</title> 	<link rel="stylesheet" 		href= "https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" /> 	<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script> </head>  <body> 	<div class="container"> 		<br> 		<h1 class="text-center"> 			Book Recommendation System 		</h1> 		<div class="form-group"> 			<label for="userInput"> 				Enter Your Preferences: 			</label> 			<textarea class="form-control" 			id="userInput" rows="3"> 			</textarea> 		</div> 		<button type="button" 				class="btn btn-primary" 				id="recommendBtn"> 			Get Book Recommendation 		</button> 		<div id="recommendation" class="mt-3"> 		</div> 		<div id="loader" class="mt-3 text-center" 		style="display: none;"> 			<div class="spinner-border text-primary" 				role="status"> 				<span class="sr-only"> 					Loading... 				</span> 			</div> 		</div> 	</div>  	<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script> 	<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script> 	<script src="script.js" defer></script> </body>  </html> 
JavaScript
// public/script.js  document.addEventListener("DOMContentLoaded", () => { 	const recommendBtn = document.getElementById("recommendBtn"); 	const userInput = document.getElementById("userInput"); 	const recommendationDiv = document.getElementById("recommendation"); 	const loaderDiv = document.getElementById("loader");  	recommendBtn.addEventListener("click", async () => { 		const inputText = userInput.value.trim();  		if (inputText === "") { 			alert("Please enter your preferences."); 			return; 		}  		// Show loader 		loaderDiv.style.display = "block";  		try { 			const response = await axios.get(`/recommend?input=${inputText}`); 			const recommendedBook = marked.parse(response.data);  			if (recommendedBook) { 				recommendationDiv.innerHTML = ` 					<h3>Recommended Book:</h3> 					<p>${recommendedBook}</p> 				`; 			} else { 				recommendationDiv.innerHTML = ` 					<p>No book recommendation available.</p> 				`; 			} 		} catch (error) { 			console.error(error); 			recommendationDiv.innerHTML = ` 				<p>An error occurred while fetching book recommendation.</p> 			`; 		} finally { 			// Hide loader 			loaderDiv.style.display = "none"; 		} 	}); }); 
JavaScript
// server.js const express = require("express"); const axios = require("axios"); const dotenv = require("dotenv"); const { OpenAI } = require("openai");  dotenv.config();  const app = express(); const PORT = process.env.PORT || 3000; const OPENAI_API_KEY = process.env.OPENAI_API_KEY;  const openai = new OpenAI({ apiKey: OPENAI_API_KEY });  app.use(express.static("public"));  app.get("/recommend", async (req, res) => { 	try { 		const userInput = req.query.input; 		const completion = await openai.chat.completions.create({ 			messages: [ 				{ 					role: "system", 					content: "You are helpful in recommending books." 				}, 				{ 					role: "user", 					content: userInput + "\n list out all books" 				}, 			], 			model: "gpt-3.5-turbo", 		}); 		const recommendedBook = completion.choices[0].message.content; 		res.send(recommendedBook); 	} catch (error) { 		console.error(error); 		res.status(500).send(` 	An error occurred while processing your request.`); 	} });  app.listen(PORT, () => { 	console.log(`Server is running on port ${PORT}`); }); 

Run the following command to start the server:

node server.js

Output:


frame_61_delay-01s
Fig:4 Output- Recommended Python books

Next Article
Movie Recommendation System with Node and Express.js
author
devnamdevcse
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Article Tags :
  • Project
  • Web Technologies
  • Node.js
  • Express.js
  • Dev Scripter
  • Web Development Projects
  • Dev Scripter 2024
  • Node.js - Projects

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