# Add these imports to the top of bot.py
import csv
import io
import database as db

async def export_members(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    """Exports channel members to a CSV file."""
    user = update.effective_user
    chat = update.effective_chat

    if chat.type != 'channel':
        await update.message.reply_text("This command can only be used in a channel.")
        return

    # --- Permission Check ---
    try:
        admins = await context.bot.get_chat_administrators(chat.id)
        is_creator = False
        for admin in admins:
            if admin.user.id == user.id and admin.status == 'creator':
                is_creator = True
                break
        
        if not is_creator:
            await update.message.reply_text("Sorry, only the channel creator can use this command.")
            return
            
    except Exception as e:
        await update.message.reply_text(f"An error occurred while checking permissions: {e}")
        return
        
    await update.message.reply_text("Exporting members... This may take a moment for large channels.")
    
    # The rest of the logic will go here in the next step

# In the main() function of bot.py, uncomment and add the handler:
# application.add_handler(CommandHandler("export", export_members))

# At the start of main(), also add the database setup call:
db.setup_database()

# Hashtags: #BotLogic #Permissions #Security #TelegramAPI

---

#Step 4: Fetching Members and Generating the CSV File

This is the continuation of the export_members function. After passing the permission check, the bot will fetch the list of administrators (as a reliable way to get some members) and generate a CSV file in memory.

NOTE: The Bot API has limitations on fetching a complete list of non-admin members in very large channels. This example reliably fetches administrators. A more advanced "userbot" would be needed to guarantee fetching all members.