Update app.py

app.py

@@ -23,6 +23,7 @@ async def fetch_messages(channel_username):
                 'date': str(message.date),
                 'forwarded_from': message.forward.sender.username if message.forward else None
             })
+        print(f"Messages fetched: {len(messages)}")  # Mensaje de depuración
         return messages
     except Exception as e:
         print(f"Error fetching messages: {str(e)}")
@@ -46,13 +47,19 @@ def visualize_network(channel_username):
         messages = asyncio.run(fetch_messages(channel_username))
         
         if not messages:  # Si no hay mensajes, devuelve un gráfico vacío
-            G = nx.DiGraph()
             plt.figure(figsize=(10, 8))
-            plt.title("No data available")
+            plt.title("No data available for this channel")
+            plt.text(0.5, 0.5, "Try another channel or check the username.", fontsize=12, ha='center')
             return plt.gcf()
         
         G = build_network(messages)
         
+        if G.number_of_edges() == 0:  # Si no hay aristas, muestra un mensaje
+            plt.figure(figsize=(10, 8))
+            plt.title("No forwarding patterns found")
+            plt.text(0.5, 0.5, "This channel has no forwarded messages.", fontsize=12, ha='center')
+            return plt.gcf()
+        
         plt.figure(figsize=(10, 8))
         pos = nx.spring_layout(G)
         nx.draw(G, pos, with_labels=True, node_size=3000, node_color='lightblue', font_size=10, font_weight='bold')
@@ -64,6 +71,7 @@ def visualize_network(channel_username):
         print(f"Error in visualize_network: {str(e)}")
         plt.figure(figsize=(10, 8))
         plt.title("An error occurred")
+        plt.text(0.5, 0.5, "Please check the logs for more details.", fontsize=12, ha='center')
         return plt.gcf()
 
 # Interfaz de Gradio