Update app.py

app.py

@@ -4,6 +4,7 @@ import os
 import zipfile
 import logging
 from threading import Thread
+import json
 
 import dash
 import dash_bootstrap_components as dbc
@@ -54,8 +55,7 @@ app.layout = dbc.Container([
     ], className="my-3"),
     dbc.Button("Split PDF", id='split-button', color="primary", className="mt-3", disabled=True),
     dbc.Progress(id='progress-bar', className="my-3"),
-    dbc.Spinner(html.Div(id='processing-spinner'), color="primary", type="grow"),
-    dbc.Button("Download ZIP", id='download-button', color="success", className="mt-3", disabled=True),
+    dbc.Button("Download ZIP", id='download-button', color="success", className="mt-3"),
     dcc.Download(id="download-zip"),
     html.Div(id='log-output', style={'whiteSpace': 'pre-line'}),
 ], fluid=True)
@@ -104,9 +104,7 @@ def remove_range(n_clicks, existing_ranges):
 
 @callback(
     Output('progress-bar', 'value'),
-    Output('download-button', 'disabled'),
     Output('log-output', 'children'),
-    Output('processing-spinner', 'children'),
     Input('split-button', 'n_clicks'),
     State('upload-pdf', 'contents'),
     State('upload-pdf', 'filename'),
@@ -128,7 +126,7 @@ def split_pdf(n_clicks, contents, filename, ranges):
     thread = Thread(target=process_pdf, args=(contents, filename, ranges))
     thread.start()
     
-    return 0, True, "PDF splitting process started. Check console for detailed logs.", "Processing..."
+    return 0, "PDF splitting process started. Check console for detailed logs."
 
 def process_pdf(contents, filename, ranges):
     global progress, generated_file
@@ -168,9 +166,7 @@ def process_pdf(contents, filename, ranges):
 
 @callback(
     Output('progress-bar', 'value', allow_duplicate=True),
-    Output('download-button', 'disabled', allow_duplicate=True),
     Output('log-output', 'children', allow_duplicate=True),
-    Output('processing-spinner', 'children', allow_duplicate=True),
     Input('progress-bar', 'value'),
     prevent_initial_call=True
 )
@@ -178,12 +174,12 @@ def update_progress(value):
     global progress
     if progress == 100:
         logger.info("PDF splitting completed")
-        return 100, False, "PDF splitting completed. Click 'Download ZIP' to get your files.", ""
+        return 100, "PDF splitting completed. Click 'Download ZIP' to get your files."
     elif progress == -1:
         logger.error("PDF splitting failed")
-        return 0, True, "Error occurred during PDF splitting. Check console for details.", ""
+        return 0, "Error occurred during PDF splitting. Check console for details."
     else:
-        return progress, True, f"Processing... {progress:.0f}% complete", "Processing..."
+        return progress, f"Processing... {progress:.0f}% complete"
 
 @callback(
     Output("download-zip", "data"),