app.py

import qrcode
from PIL import Image
import gradio as gr
import io
import base64


# Function to generate a QR code and return base64 string
def generate_qr(data):
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=10,
        border=4,
    )
    qr.add_data(data)
    qr.make(fit=True)
    img = qr.make_image(fill="black", back_color="white")

    # Encode the image as a base64 string
    buffered = io.BytesIO()
    img.save(buffered, format="PNG")
    img_base64 = base64.b64encode(buffered.getvalue()).decode("utf-8")
    return f"data:image/png;base64,{img_base64}"  # Return the base64 string


# Gradio Interface
def create_gradio_interface():
    with gr.Blocks() as demo:
        gr.Markdown("## QR Code Generator and Viewer")
        
        # Input to generate QR code
        with gr.Tab("Generate QR Code"):
            with gr.Row():
                data_input = gr.Textbox(placeholder="Enter text or URL to encode", label="Input Data")
                generate_button = gr.Button("Generate QR Code")

            qr_code_html = gr.HTML(label="Generated QR Code (Base64 Embedded)")

            def generate_qr_interface(data):
                if not data.strip():
                    raise ValueError("Input text cannot be empty!")
                img_base64 = generate_qr(data)
                # Wrap the base64 string in an <img> tag for display
                html_content = f'<img src="{img_base64}" alt="QR Code" style="max-width:300px;">'
                return html_content

            generate_button.click(
                generate_qr_interface,
                inputs=data_input,
                outputs=qr_code_html,
            )

    demo.launch(share=True)


# Run the Gradio interface
create_gradio_interface()