support file attachments

bot.py

@@ -49,6 +49,18 @@ async def get_or_create_conversation(channel_id):
         }
     return channel_conversations[channel_id]
 
+async def get_text_file_contents(attachment):
+    """Download and read the contents of a text file attachment"""
+    if not attachment.filename.endswith(('.txt', '.md', '.py', '.js', '.html', '.css', '.json', '.yaml', '.yml')):
+        return None
+
+    try:
+        file_content = await attachment.read()
+        return f"\nContents of {attachment.filename}:\n```\n{file_content.decode('utf-8')}\n```"
+    except Exception as e:
+        print(f"Error reading attachment {attachment.filename}: {e}")
+        return None
+
 @bot.event
 async def on_ready():
     print(f'{bot.user} has connected to Discord!')
@@ -69,10 +81,20 @@ async def on_message(message):
     # Get or create conversation for this channel
     conversation = await get_or_create_conversation(message.channel.id)
 
+    # Process message content and any text file attachments
+    full_message = message.content
+
+    # Handle text file attachments
+    if message.attachments:
+        for attachment in message.attachments:
+            file_content = await get_text_file_contents(attachment)
+            if file_content:
+                full_message += file_content
+
     # Always add message to conversation history
     conversation['messages'].append({
         'role': 'user',
-        'content': message.content
+        'content': full_message
     })
 
     # Keep conversation history manageable (last 20 messages)