Update app.py

app.py

@@ -1,41 +1,63 @@
 import gradio as gr
 import barcode
-from barcode.writer import ImageWriter
-from PIL import Image
+from barcode.writer import SVGWriter
+from io import BytesIO
 
-def generate_barcode(text, barcode_type):
-    # Select the barcode class based on user choice
+# Barcode explanations
+BARCODE_EXPLANATIONS = {
+    "EAN13": (
+        "EAN-13 (International Article Number) is a 13-digit barcode widely used for retail products globally. "
+        "It encodes a GS1 prefix (country or organization), manufacturer code, product code, and a check digit. "
+        "EAN-13 is compatible with UPC systems and is essential for international product identification."
+    ),
+    "Code128": (
+        "Code 128 is a high-density, variable-length barcode that can encode all ASCII characters (letters, numbers, symbols). "
+        "It is commonly used in logistics and shipping due to its ability to store complex data in a compact form and includes a checksum for error detection."
+    ),
+    "UPC": (
+        "UPC (Universal Product Code) is a 12-digit barcode used mainly in North America for retail product identification. "
+        "It consists of a manufacturer code, item number, and a check digit. UPCs streamline inventory and checkout processes in stores."
+    ),
+    "ISBN13": (
+        "ISBN-13 is a 13-digit identifier for books, encoded as an EAN-13 barcode. "
+        "It uniquely identifies books internationally and is essential for publishers, libraries, and retailers."
+    ),
+}
+
+def generate_barcode_svg(text, barcode_type):
     BARCODE_CLASSES = {
         "EAN13": barcode.get_barcode_class('ean13'),
         "Code128": barcode.get_barcode_class('code128'),
         "UPC": barcode.get_barcode_class('upc'),
         "ISBN13": barcode.get_barcode_class('isbn13'),
     }
+    explanation = BARCODE_EXPLANATIONS.get(barcode_type, "No explanation available.")
     try:
         bc_class = BARCODE_CLASSES[barcode_type]
-    except KeyError:
-        return None
-
-    # Generate barcode and save to image in memory
-    try:
-        barcode_img = bc_class(text, writer=ImageWriter())
-        # Save to a BytesIO object instead of disk
-        from io import BytesIO
-        buffer = BytesIO()
-        barcode_img.write(buffer)
-        buffer.seek(0)
-        img = Image.open(buffer)
-        return img
+        svg_buffer = BytesIO()
+        bc = bc_class(text, writer=SVGWriter())
+        bc.write(svg_buffer)
+        svg_data = svg_buffer.getvalue().decode("utf-8")
+        return explanation, svg_data
     except Exception as e:
-        return None
+        return f"Error: {str(e)}", None
 
 with gr.Blocks() as demo:
-    gr.Markdown("# Barcode Generator")
+    gr.Markdown("# Barcode Generator (SVG Output)")
     with gr.Row():
         text_input = gr.Textbox(label="Text to encode")
-        barcode_type = gr.Dropdown(["EAN13", "Code128", "UPC", "ISBN13"], value="Code128", label="Barcode Type")
-    output = gr.Image(type="pil", label="Generated Barcode")
+        barcode_type = gr.Dropdown(
+            ["EAN13", "Code128", "UPC", "ISBN13"],
+            value="Code128",
+            label="Barcode Type"
+        )
+    explanation_box = gr.Markdown(label="Barcode Explanation")
+    svg_output = gr.HTML(label="Generated Barcode (SVG)")
     btn = gr.Button("Generate Barcode")
-    btn.click(generate_barcode, inputs=[text_input, barcode_type], outputs=output)
+    btn.click(
+        generate_barcode_svg,
+        inputs=[text_input, barcode_type],
+        outputs=[explanation_box, svg_output]
+    )
 
 demo.launch()