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from flask import Flask, render_template_string, request, jsonify
import speech_recognition as sr
from tempfile import NamedTemporaryFile
import os
import ffmpeg
import logging
from werkzeug.exceptions import BadRequest
app = Flask(__name__)
logging.basicConfig(level=logging.INFO)
# Global variables
cart = [] # To store items and prices
MENU = {
"Biryani": {"Chicken Biryani": 250, "Veg Biryani": 200, "Mutton Biryani": 300},
"Starters": {
"Chicken Wings": 220,
"Paneer Tikka": 180,
"Fish Fingers": 250,
"Spring Rolls": 160,
},
"Breads": {
"Butter Naan": 50,
"Garlic Naan": 60,
"Roti": 40,
"Lachha Paratha": 70,
},
"Curries": {
"Butter Chicken": 300,
"Paneer Butter Masala": 250,
"Dal Tadka": 200,
"Chicken Tikka Masala": 320,
},
"Drinks": {"Coke": 60, "Sprite": 60, "Mango Lassi": 80, "Masala Soda": 70},
"Desserts": {
"Gulab Jamun": 100,
"Rasgulla": 90,
"Ice Cream": 120,
"Brownie with Ice Cream": 180,
},
}
# HTML Template for Frontend
html_code = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>AI Dining Assistant</title>
<style>
body {
font-family: Arial, sans-serif;
text-align: center;
background-color: #f4f4f9;
}
h1 {
color: #333;
}
.mic-button {
width: 80px;
height: 80px;
border-radius: 50%;
background-color: #007bff;
color: white;
font-size: 24px;
border: none;
cursor: pointer;
}
.status, .response {
margin-top: 20px;
}
</style>
</head>
<body>
<h1>AI Dining Assistant</h1>
<button class="mic-button" id="mic-button">🎤</button>
<div class="status" id="status">Press the mic button to start...</div>
<div class="response" id="response" style="display: none;">Response will appear here...</div>
<script>
const micButton = document.getElementById('mic-button');
const status = document.getElementById('status');
const response = document.getElementById('response');
let isListening = false;
micButton.addEventListener('click', () => {
if (!isListening) {
isListening = true;
greetUser();
}
});
function greetUser() {
const utterance = new SpeechSynthesisUtterance("Hi. Welcome to Biryani Hub. Can I show you the menu?");
speechSynthesis.speak(utterance);
utterance.onend = () => {
status.textContent = "Listening...";
startListening();
};
}
async function startListening() {
const stream = await navigator.mediaDevices.getUserMedia({ audio: true });
const mediaRecorder = new MediaRecorder(stream, { mimeType: "audio/webm;codecs=opus" });
const audioChunks = [];
mediaRecorder.ondataavailable = (event) => audioChunks.push(event.data);
mediaRecorder.onstop = async () => {
const audioBlob = new Blob(audioChunks, { type: "audio/webm" });
const formData = new FormData();
formData.append("audio", audioBlob);
status.textContent = "Processing...";
try {
const result = await fetch("/process-audio", { method: "POST", body: formData });
const data = await result.json();
response.textContent = data.response;
response.style.display = "block";
const utterance = new SpeechSynthesisUtterance(data.response);
speechSynthesis.speak(utterance);
utterance.onend = () => {
if (!data.response.includes("Goodbye") && !data.response.includes("final order")) {
startListening(); // Continue listening
} else {
status.textContent = "Conversation ended.";
isListening = false;
}
};
} catch (error) {
response.textContent = "Error processing your request. Please try again.";
status.textContent = "Press the mic button to restart.";
isListening = false;
}
};
mediaRecorder.start();
setTimeout(() => mediaRecorder.stop(), 5000); // Stop recording after 5 seconds
}
</script>
</body>
</html>
"""
@app.route("/")
def index():
return render_template_string(html_code)
@app.route("/process-audio", methods=["POST"])
def process_audio():
try:
audio_file = request.files.get("audio")
if not audio_file:
raise BadRequest("No audio file provided.")
temp_file = NamedTemporaryFile(delete=False, suffix=".webm")
audio_file.save(temp_file.name)
if os.path.getsize(temp_file.name) == 0:
raise BadRequest("Uploaded audio file is empty.")
converted_file = NamedTemporaryFile(delete=False, suffix=".wav")
ffmpeg.input(temp_file.name).output(
converted_file.name, acodec="pcm_s16le", ac=1, ar="16000"
).run(overwrite_output=True)
recognizer = sr.Recognizer()
with sr.AudioFile(converted_file.name) as source:
audio_data = recognizer.record(source)
try:
command = recognizer.recognize_google(audio_data)
response = process_command(command)
except sr.UnknownValueError:
response = "Sorry, I could not understand. Please try again."
return jsonify({"response": response})
except BadRequest as br:
return jsonify({"response": f"Bad Request: {str(br)}"}), 400
except Exception as e:
return jsonify({"response": f"An error occurred: {str(e)}"}), 500
finally:
os.unlink(temp_file.name)
os.unlink(converted_file.name)
def process_command(command):
global cart, MENU
command = command.lower()
# Handle specific category requests
for category in MENU.keys():
if category.lower() in command:
items = MENU[category]
item_list = ", ".join([f"{item} (₹{price})" for item, price in items.items()])
return f"{category} menu: {item_list}. What would you like to order?"
# Handle full menu request
if "menu" in command:
categories = ", ".join(MENU.keys())
return f"We have the following categories: {categories}. Which one would you like to explore?"
# Add items to the cart
all_items = {item.lower(): (category, price) for category, items in MENU.items() for item, price in items.items()}
if command in all_items.keys():
category, price = all_items[command]
cart.append((command.title(), price))
total = sum(item[1] for item in cart)
cart_summary = ", ".join([f"{i[0]} (₹{i[1]})" for i in cart])
return f"{command.title()} added to your cart. Your cart: {cart_summary}. Total: ₹{total}. Do you want to order anything else?"
# Remove items from the cart
if "remove" in command:
for item in cart:
if item[0].lower() in command:
cart.remove(item)
total = sum(i[1] for i in cart)
cart_summary = ", ".join([f"{i[0]} (₹{i[1]})" for i in cart])
return f"{item[0]} removed from your cart. Updated cart: {cart_summary}. Total: ₹{total}."
return "The item you are trying to remove is not in your cart. Please check again."
# Handle final order
if "final order" in command or "submit" in command:
if cart:
items = ", ".join([f"{item[0]} (₹{item[1]})" for item in cart])
total = sum(item[1] for item in cart)
cart.clear()
return f"Your final order is: {items}. Total price: ₹{total}. Thank you for ordering!"
else:
return "Your cart is empty. Please add items first."
# Handle goodbye
if "no" in command or "nothing" in command or "goodbye" in command:
cart.clear()
return "Goodbye! Thank you for using AI Dining Assistant."
return "Sorry, I didn't understand that. Please try again."
if __name__ == "__main__":
app.run(host="0.0.0.0", port=7860)
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