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Make a Website Chat BOT with Node.js

Below is a comprehensive lab workbook for creating a men's ware ecommerce website using Node.js, MongoDB for the backend, and integrating an OpenAI chatbot for customer service.

The lab includes code for setting up the backend, populating the MongoDB database, creating the web frontend, and processing orders by writing text files to the host file system.


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Lab Workbook: Men's Ware Ecommerce Website with MongoDB and OpenAI Chatbot

Prerequisites

Before starting this lab, you should have the following prerequisites in place:
Basic understanding of HTML, CSS, and JavaScript.
Node.js and npm (Node Package Manager) installed on your machine.
MongoDB installed and running locally or on a cloud service.

Setup

Create a new directory for your project and navigate to it using the terminal or command prompt.
Initialize a new Node.js project by running the following command:
npm init -y
Install the required dependencies (Express.js, MongoDB, Mongoose, EJS, Axios, and Body-parser) by running: npm install express mongoose ejs axios body-parser
Create the following project structure:
- your-project-folder |- public | |- css | | |- styles.css | |- js | | |- client.js |- views | |- index.ejs | |- chatbot.ejs |- server.js

Step 1: Setting up the Backend (server.js)

Create the server.js file in your project folder. This file will handle the backend setup, MongoDB connection, and API endpoints.
const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const axios = require("axios");

const app = express();

// Replace 'YOUR_MONGODB_CONNECTION_STRING' with your actual MongoDB connection string
mongoose.connect("YOUR_MONGODB_CONNECTION_STRING", {
useNewUrlParser: true,
useUnifiedTopology: true,
});

const productSchema = new mongoose.Schema({
name: String,
category: String,
price: Number,
});

const Product = mongoose.model("Product", productSchema);

app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static("public"));
app.set("view engine", "ejs");

// API endpoint to get all products
app.get("/api/products", async (req, res) => {
try {
const products = await Product.find();
res.json(products);
} catch (error) {
res.status(500).json({ message: "Internal server error" });
}
});

// API endpoint to process orders and write to the host file system
app.post("/api/orders", (req, res) => {
// Code to process orders and write to the file system goes here
// For simplicity, we'll just respond with a success message
res.json({ message: "Order processed successfully" });
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
console.log(`Server is running on http://localhost:${port}`);
});

Step 2: Populating Data Records for Men's Ware Products

Before running this step, make sure your MongoDB server is running, and you have a connection string to your MongoDB database.

const mongoose = require("mongoose");

mongoose.connect("YOUR_MONGODB_CONNECTION_STRING", {
useNewUrlParser: true,
useUnifiedTopology: true,
});

const productSchema = new mongoose.Schema({
name: String,
category: String,
price: Number,
});

const Product = mongoose.model("Product", productSchema);

// Populate data records for items typically sold at a men's ware website
const products = [
{ name: "Hat", category: "Hats", price: 20 },
{ name: "Coat", category: "Coats", price: 100 },
{ name: "Gloves", category: "Gloves", price: 15 },
{ name: "Formal Wear", category: "Formal Wear", price: 150 },
{ name: "Leisure Wear", category: "Leisure Wear", price: 50 },
];

Product.insertMany(products)
.then(() => {
console.log("Data records inserted successfully");
mongoose.connection.close();
})
.catch((error) => {
console.error("Error inserting data records:", error);
mongoose.connection.close();
});

Step 3: Creating the Front-end (index.ejs)

Create the index.ejs file inside the views folder. This file will contain the HTML structure and the forms to select products and place orders.
<!DOCTYPE html>
<html>
<head>
<title>Men's Ware Ecommerce Website</title>
<link rel="stylesheet" href="/css/styles.css">
</head>
<body>
<h1>Welcome to Men's Ware Ecommerce</h1>

<h2>Available Products:</h2>
<ul>
<% products.forEach((product) => { %>
<li>
<%= product.name %> - <%= product.category %> - $<%= product.price %>
<form action="/api/orders" method="POST">
<input type="hidden" name="product" value="<%= product.name %>">
<button type="submit">Order</button>
</form>
</li>
<% }) %>
</ul>

<!-- Add your JavaScript code here -->
<script src="/js/client.js"></script>
</body>
</html>

Step 4: Implementing the Front-end Interaction (client.js)

Create the client.js file inside the public/js folder. This file will handle the front-end interactions and make API calls to place orders.
const orderForms = document.querySelectorAll("form");

orderForms.forEach((form) => {
form.addEventListener("submit", async (event) => {
event.preventDefault();
const formData = new FormData(form);
const product = formData.get("product");

try {
const response = await axios.post("/api/orders", { product });
console.log(response.data.message);
} catch (error) {
console.error("Error placing the order:", error);
}
});
});

Step 5: Creating the Chatbot Front-end (chatbot.ejs)

Create the chatbot.ejs file inside the views folder. This file will contain the chat interface with the OpenAI chatbot.
<!DOCTYPE html>
<html>
<head>
<title>Customer Service Chat</title>
<link rel="stylesheet" href="/css/styles.css">
</head>
<body>
<h1>Customer Service Chat</h1>
<div id="chat-container">
<ul id="chat-messages"></ul>
</div>
<input type="text" id="user-input" placeholder="Type your message...">
<button onclick="sendMessage()">Send</button>

<!-- Add your JavaScript code here -->
<script src="/js/client.js"></script>
</body>
</html>

Step 6: Implementing the OpenAI Chatbot Interaction (client.js)

Update the client.js file inside the public/js folder
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Men's Ware Ecommerce Website with MongoDB and OpenAI Chatbot

Introduction

In this project, we will build a Men's Ware Ecommerce Website with a backend powered by Node.js and MongoDB. The website will allow users to browse and select products, place orders, and interact with a chatbot for customer service.

Prerequisites

Node.js and npm installed on your machine.
MongoDB installed and running locally or on a cloud service.
Basic knowledge of HTML, CSS, and JavaScript.

Step 1: Setting up the Backend

Create a new directory for the project and initialize a new Node.js project.
Install the required dependencies (Express.js, MongoDB, Mongoose, EJS, Axios, and Body-parser).
Create the server.js file to handle the backend setup, MongoDB connection, and API endpoints.
javascriptCopy code
// Include server.js code here

Step 2: Populating Data Records

Create a new file, e.g., data-population.js.
Include the code to connect to MongoDB and populate data records for men's ware products (hats, coats, gloves, formal wear, and leisure wear).
javascriptCopy code
// Include data-population.js code here

Step 3: Creating the Front-end

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