app.py

import gradio as gr
import qrcode
from PIL import Image
import uuid
import os

def generate_qr(data):
    if not data:
        raise gr.Error("Please enter text or URL!")

    qr = qrcode.QRCode(box_size=10, border=4)
    qr.add_data(data)
    qr.make(fit=True)
    img = qr.make_image(fill_color="black", back_color="white")

    img = img.convert("RGB")  # Ensure PIL format
    return img

def save_qr(data):
    if not data:
        raise gr.Error("Please enter text or URL!")

    # Generate QR
    qr = qrcode.QRCode(box_size=10, border=4)
    qr.add_data(data)
    qr.make(fit=True)
    img = qr.make_image(fill_color="black", back_color="white")
    img = img.convert("RGB")

    # Save with unique file name
    filename = f"qr_{uuid.uuid4().hex}.png"
    filepath = f"/tmp/{filename}"
    img.save(filepath)

    return filepath  # Gradio automatically downloads this file

with gr.Blocks() as demo:
    gr.Markdown("## 📱 QR Code Generator")

    text = gr.Textbox(label="Enter Text / URL / Image URL")
    
    with gr.Row():
        generate = gr.Button("Generate QR Code")
        download = gr.Button("Download QR Code")

    output = gr.Image(label="QR Code")

    with gr.Accordion("Guideline", open=False):
        gr.Markdown("""
        **How to use this app**
        1. Enter Text or URL  
        2. Click **Generate QR Code**  
        3. Scan the QR code with your mobile  
        4. Or click **Download QR Code** to save it  
        """)

    generate.click(fn=generate_qr, inputs=text, outputs=output)
    download.click(fn=save_qr, inputs=text, outputs=gr.File(label="Download File"))

demo.launch()