Update app.py

app.py

@@ -8,37 +8,47 @@ from io import BytesIO
 from flask import Flask, request, jsonify
 
 from telegram import Update, InputFile, InlineKeyboardButton, InlineKeyboardMarkup
-from telegram.ext import Application, CommandHandler, MessageHandler, CallbackQueryHandler, filters, ConversationHandler
+from telegram.ext import (
+    Application,
+    CommandHandler,
+    MessageHandler,
+    CallbackQueryHandler,
+    filters,
+    ConversationHandler
+)
 from telegram.constants import ParseMode
-
 from pydub import AudioSegment
 
+# Environment variables
 TOKEN = os.getenv("TELEGRAM_BOT_TOKEN")
 if not TOKEN:
     print("Error: TELEGRAM_BOT_TOKEN environment variable not set.", file=sys.stderr)
     sys.exit(1)
 
 BOT_USERNAME = os.getenv("TELEGRAM_BOT_USERNAME", "Voice2mp3_RoBot")
-
 ADMIN_ID = int(os.getenv("TELEGRAM_ADMIN_ID", "0"))
 if ADMIN_ID == 0:
-    print("Warning: TELEGRAM_ADMIN_ID environment variable not set or set to 0. Admin features might not work.", file=sys.stderr)
+    print("Warning: TELEGRAM_ADMIN_ID not set or 0.", file=sys.stderr)
 
 DOWNLOAD_DIR = "/tmp/downloads"
 OUTPUT_DIR = "/tmp/outputs"
 CHANNELS_FILE = "channels.json"
-
 os.makedirs(DOWNLOAD_DIR, exist_ok=True)
 os.makedirs(OUTPUT_DIR, exist_ok=True)
 
+# Telegram states
+LANGUAGE_SELECTION, MAIN_MENU, CONVERT_AUDIO, CUT_AUDIO_FILE, CUT_AUDIO_RANGE, \
+    VIDEO_CONVERSION_MODE, WAITING_FOR_MEMBERSHIP, ADMIN_MENU, ADD_CHANNEL, LIST_REMOVE_CHANNELS = range(10)
+
+# Load and save channels
+
 def load_required_channels():
     if os.path.exists(CHANNELS_FILE):
         try:
             with open(CHANNELS_FILE, 'r', encoding='utf-8') as f:
                 return json.load(f)
         except json.JSONDecodeError:
-            print(f"Error decoding JSON from {CHANNELS_FILE}. Starting with empty list.", file=sys.stderr)
-            return []
+            print(f"Error decoding JSON from {CHANNELS_FILE}.", file=sys.stderr)
     return []
 
 def save_required_channels(channels):
@@ -47,803 +57,49 @@ def save_required_channels(channels):
 
 REQUIRED_CHANNELS = load_required_channels()
 
-LANGUAGE_SELECTION, MAIN_MENU, CONVERT_AUDIO, CUT_AUDIO_FILE, CUT_AUDIO_RANGE, \
-    VIDEO_CONVERSION_MODE, WAITING_FOR_MEMBERSHIP, \
-    ADMIN_MENU, ADD_CHANNEL, LIST_REMOVE_CHANNELS = range(10)
-
-MESSAGES = {
-    'fa': {
-        'start_welcome': "سلام! من یک ربات تبدیل فرمت صوتی و ویدیویی هستم.\n\nبرای شروع، از منوی زیر یک قابلیت را انتخاب کنید.",
-        'choose_language': "زبان مورد نظر خود را انتخاب کنید:",
-        'processing_start': "⏳ در حال شروع پردازش...",
-        'file_received': "⬇️ فایل دریافت شد. در حال تبدیل...",
-        'conversion_done': "⚙️ تبدیل فرمت انجام شد. در حال ارسال...",
-        'mp3_to_voice_reply': "ویس تلگرام شما (تبدیل شده از MP3)",
-        'voice_to_mp3_caption': "فایل MP3 شما (تبدیل شده از ویس تلگرام)",
-        'error_mp3_to_voice': "❌ خطا در تبدیل MP3 به ویس تلگرام: ",
-        'error_voice_to_mp3': "❌ خطا در تبدیل ویس تلگرام به MP3: ",
-        'general_error': "متاسفم، مشکلی پیش آمد. لطفاً دوباره تلاش کنید.",
-        'main_menu_prompt': "چه کاری می‌خواهید روی فایل خود انجام دهید؟",
-        'btn_convert_format': "تغییر فرمت صدا 🎵",
-        'btn_cut_audio': "برش قسمتی از صدا ✂️",
-        'btn_video_conversion': "تبدیل ویدیو دایره‌ای 🎥",
-        'convert_mode_active': "شما در حالت 'تغییر فرمت صدا' هستید. حالا فایل صوتی (ویس یا MP3) خود را برای من ارسال کنید.",
-        'cut_mode_active_file': "شما در قسمت 'برش و کات کردن صدا' هستید.\n\nابتدا فایل صوتی (MP3 یا ویس) خود را ارسال کنید.",
-        'cut_mode_active_range': "حالا بازه زمانی مورد نظر برای برش را به صورت 'دقیقه.ثانیه-دقیقه.ثانیه' (مثال: 00.21-00.54) ارسال کنید.",
-        'invalid_time_format': "فرمت زمان وارد شده صحیح نیست. لطفاً از فرمت 'MM.SS-MM.SS' استفاده کنید. (مثال: 00.21-00.54)",
-        'invalid_time_range': "بازه زمانی نامعتبر است یا زمان پایان از زمان شروع کمتر است. لطفاً بازه صحیح را وارد کنید.",
-        'audio_cut_success': "✅ برش صدا با موفقیت انجام شد. فایل شما آماده است.",
-        'no_audio_for_cut': "فایلی برای برش پیدا نشد. لطفاً ابتدا فایل صوتی را ارسال کنید.",
-        'cut_processing': "✂️ در حال برش صدا...",
-        'returning_to_main_menu': "بازگشت به منوی اصلی...",
-        'cancel_message': "عملیات لغو شد. به منوی ا��لی بازگشتید.",
-        'video_conversion_mode_active': "شما در حالت 'تبدیل ویدیو دایره‌ای' هستید.\n\nیک ویدیو معمولی یا یک ویدیو دایره‌ای (Video Message) برای من ارسال کنید.",
-        'file_received_video': "⬇️ فایل ویدیویی دریافت شد. در حال پردازش...",
-        'converting_video_note_to_video': "🔄 در حال تبدیل ویدیو دایره‌ای به ویدیو معمولی...",
-        'converting_video_to_video_note': "🔄 در حال تبدیل ویدیو معمولی به ویدیو دایره‌ای...",
-        'conversion_done_video': "✅ تبدیل ویدیو با موفقیت انجام شد. در حال ارسال...",
-        'video_note_to_video_caption': "ویدیو معمولی شما (تبدیل شده از ویدیو دایره‌ای)",
-        'video_to_video_note_reply': "ویدیو دایره‌ای شما (تبدیل شده از ویدیو معمولی)",
-        'error_video_conversion': "❌ خطا در تبدیل ویدیو: ",
-        'invalid_file_type_video': "لطفاً یک فایل ویدیویی یا ویدیو دایره‌ای ارسال کنید.",
-        'membership_required': "برای ادامه کار با ربات و استفاده نامحدود، لطفاً ابتدا عضو کانال‌های زیر شوید:",
-        'btn_join_channel': "عضو شدن 🤝",
-        'btn_check_membership': "بررسی عضویت ✅",
-        'membership_success': "✅ عضویت شما تأیید شد! اکنون می‌توانید به صورت نامحدود از ربات استفاده کنید.",
-        'membership_failed': "❌ متاسفم، شما هنوز عضو تمام کانال‌های مورد نیاز نیستید. لطفاً ابتدا عضو شوید و سپس دوباره 'بررسی عضویت' را بزنید.",
-        'not_admin': "شما اجازه دسترسی به این بخش را ندارید.",
-        'admin_menu_prompt': "به پنل مدیریت لینک‌ها خوش آمدید:",
-        'btn_add_channel': "افزودن لینک کانال ➕",
-        'btn_list_channels': "لیست کانال‌ها و حذف 🗑️",
-        'send_channel_link': "لطفاً لینک (مانند @mychannel) یا آیدی عددی کانال را ارسال کنید:",
-        'channel_added': "✅ کانال '{channel_id}' با موفقیت اضافه شد.",
-        'channel_already_exists': "❗️ این کانال قبلاً اضافه شده است.",
-        'no_channels_configured': "هیچ کانالی برای عضویت پیکربندی نشده است.",
-        'channel_list_prompt': "لیست کانال‌های فعلی برای عضویت اجباری:",
-        'btn_remove_channel': "حذف ❌",
-        'channel_removed': "✅ کانال '{channel_id}' با موفقیت حذف شد.",
-        'channel_not_found': "❗️ کانال مورد نظر یافت نشد.",
-        'invalid_channel_id': "آیدی/لینک کانال نامعتبر است. لطفاً @username یا آیدی عددی (مانند -1001234567890) را ارسال کنید.",
-        'bot_not_admin_in_channel': "ربات ادمین کانال '{channel_id}' نیست یا مجوزهای کافی برای بررسی عضویت را ندارد. لطفاً ربات را به عنوان ادمین با مجوز 'بررسی وضعیت اعضا' در کانال اضافه کنید."
-    },
-    'en': {
-        'start_welcome': "Hello! I am an audio and video format conversion bot.\n\nTo start, select a feature from the menu below.",
-        'choose_language': "Choose your preferred language:",
-        'processing_start': "⏳ Starting processing...",
-        'file_received': "⬇️ File received. Processing...",
-        'conversion_done': "⚙️ Conversion complete. Sending...",
-        'mp3_to_voice_reply': "Your Telegram voice (converted from MP3)",
-        'voice_to_mp3_caption': "Your MP3 file (converted from Telegram voice)",
-        'error_mp3_to_voice': "❌ Error converting MP3 to Telegram voice: ",
-        'error_voice_to_mp3': "❌ Error converting Telegram voice to MP3: ",
-        'general_error': "Sorry, something went wrong. Please try again.",
-        'main_menu_prompt': "What would you like to do with your file?",
-        'btn_convert_format': "Change Audio Format 🎵",
-        'btn_cut_audio': "Cut Part of Audio ✂️",
-        'btn_video_conversion': "Convert Circular Video 🎥",
-        'convert_mode_active': "You are now in 'Change Audio Format' mode. Send me your audio file (voice or MP3).",
-        'cut_mode_active_file': "You are in the 'Cut Audio' section.\n\nFirst, send your audio file (MP3 or voice).",
-        'cut_mode_active_range': "Now send the desired time range for cutting in 'MM.SS-MM.SS' format (example: 00.21-00.54).",
-        'invalid_time_format': "Invalid time format. Please use 'MM.SS-MM.SS' format. (example: 00.21-00.54)",
-        'invalid_time_range': "Invalid time range or end time is less than start time. Please enter a valid range.",
-        'audio_cut_success': "✅ Audio cut successfully. Your file is ready.",
-        'no_audio_for_cut': "No audio file found for cutting. Please send the audio file first.",
-        'cut_processing': "✂️ Cutting audio...",
-        'returning_to_main_menu': "Returning to main menu...",
-        'cancel_message': "Operation cancelled. Returned to main menu.",
-        'video_conversion_mode_active': "You are in 'Circular Video Conversion' mode.\n\nSend me a regular video or a circular video message (Video Message).",
-        'file_received_video': "⬇️ Video file received. Processing...",
-        'converting_video_note_to_video': "🔄 Converting circular video to regular video...",
-        'converting_video_to_video_note': "🔄 Converting regular video to circular video...",
-        'conversion_done_video': "✅ Video conversion successful. Sending...",
-        'video_note_to_video_caption': "Your regular video (converted from circular video)",
-        'video_to_video_note_reply': "Your circular video (converted from regular video)",
-        'error_video_conversion': "❌ Error converting video: ",
-        'invalid_file_type_video': "Please send a video file or a video message.",
-        'membership_required': "To continue using the bot and access unlimited features, please join the following channels first:",
-        'btn_join_channel': "Join Channel 🤝",
-        'btn_check_membership': "Check Membership ✅",
-        'membership_success': "✅ Your membership has been verified! You can now use the bot unlimitedly.",
-        'membership_failed': "❌ Sorry, you are not yet a member of all required channels. Please join first and then press 'Check Membership' again.",
-        'not_admin': "You do not have permission to access this section.",
-        'admin_menu_prompt': "Welcome to the link management panel:",
-        'btn_add_channel': "Add Channel Link ➕",
-        'btn_list_channels': "List Channels & Remove 🗑️",
-        'send_channel_link': "Please send the channel link (e.g., @mychannel) or numeric ID:",
-        'channel_added': "✅ Channel '{channel_id}' با موفقیت اضافه شد.",
-        'channel_already_exists': "❗️ This channel has already been added.",
-        'no_channels_configured': "No channels configured for membership.",
-        'channel_list_prompt': "Current list of channels for mandatory membership:",
-        'btn_remove_channel': "حذف ❌",
-        'channel_removed': "✅ Channel '{channel_id}' با موفقیت حذف شد.",
-        'channel_not_found': "❗️ Channel not found.",
-        'invalid_channel_id': "آیدی/لینک کانال نامعتبر است. لطفاً @username یا آیدی عددی (مانند -1001234567890) را ارسال کنید.",
-        'bot_not_admin_in_channel': "The bot is not an admin in channel '{channel_id}' or does not have sufficient permissions to check membership. Please add the bot as an admin with 'Check members' permission in the channel."
-    }
-}
-
-def get_message(context, key, **kwargs):
-    lang = context.user_data.get('language', 'fa')
-    message_template = MESSAGES[lang].get(key, MESSAGES['fa'][key])
-    return message_template.format(**kwargs)
-
-def parse_time_to_ms(time_str):
-    match = re.match(r'^(\d{2})\.(\d{2})$', time_str)
-    if not match:
-        raise ValueError("Invalid time format")
-
-    minutes = int(match.group(1))
-    seconds = int(match.group(2))
-
-    if seconds >= 60:
-        raise ValueError("Seconds must be between 00 and 59")
-
-    return (minutes * 60 + seconds) * 1000
-
-async def check_user_membership(update: Update, context):
-    user_id = update.effective_user.id
-
-    if not REQUIRED_CHANNELS:
-        return True
-
-    all_channels_joined = True
-    for channel_id in REQUIRED_CHANNELS:
-        try:
-            chat_member = await context.bot.get_chat_member(chat_id=channel_id, user_id=user_id)
-            if chat_member.status not in ['member', 'administrator', 'creator']:
-                all_channels_joined = False
-                break
-        except Exception as e:
-            print(f"Error checking membership for channel {channel_id}: {e}", file=sys.stderr)
-            all_channels_joined = False
-            break
-    return all_channels_joined
-
-async def show_membership_required_message(update: Update, context):
-    keyboard = []
-    if not REQUIRED_CHANNELS:
-        return await show_main_menu(update, context)
-
-    for channel_id in REQUIRED_CHANNELS:
-        try:
-            chat = await context.bot.get_chat(chat_id=channel_id)
-            if chat.invite_link:
-                keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_join_channel')} {chat.title or channel_id}", url=chat.invite_link)])
-            elif chat.username:
-                keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_join_channel')} @{chat.username}", url=f"https://t.me/{chat.username}")])
-            else:
-                keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_join_channel')} {channel_id}", callback_data=f"no_link_{channel_id}")])
-        except Exception as e:
-            print(f"Could not get chat info for {channel_id}: {e}", file=sys.stderr)
-            keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_join_channel')} {channel_id}", callback_data=f"no_link_{channel_id}")])
-
-    keyboard.append([InlineKeyboardButton(get_message(context, 'btn_check_membership'), callback_data='check_membership')])
-    reply_markup = InlineKeyboardMarkup(keyboard)
-
-    if update.callback_query:
-        await update.callback_query.edit_message_text(
-            get_message(context, 'membership_required'),
-            reply_markup=reply_markup
-        )
-    else:
-        await update.effective_message.reply_text(
-            get_message(context, 'membership_required'),
-            reply_markup=reply_markup
-        )
-    return WAITING_FOR_MEMBERSHIP
-
-async def process_feature_or_check_membership(update: Update, context, feature_func, *args, **kwargs):
-    user_id = update.effective_user.id
-
-    if user_id == ADMIN_ID:
-        return await feature_func(update, context, *args, **kwargs)
-
-    if not REQUIRED_CHANNELS:
-        return True
-
-    if context.user_data.get('used_bot_once', False) and not context.user_data.get('is_member', False):
-        return await show_membership_required_message(update, context)
-
-    if not context.user_data.get('used_bot_once', False):
-        context.user_data['used_bot_once'] = True
-        is_member = await check_user_membership(update, context)
-        context.user_data['is_member'] = is_member
-        if not is_member:
-            return await show_membership_required_message(update, context)
-
-    result = await feature_func(update, context, *args, **kwargs)
-
-    if not context.user_data.get('is_member', False):
-        return await show_membership_required_message(update, context)
-
-    return result
-
-async def check_membership_callback(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-
-    is_member = await check_user_membership(update, context)
-    if is_member:
-        context.user_data['is_member'] = True
-        await query.edit_message_text(get_message(context, 'membership_success'))
-        return await show_main_menu(update, context)
-    else:
-        await query.edit_message_text(get_message(context, 'membership_failed'),
-                                      reply_markup=query.message.reply_markup)
-        return WAITING_FOR_MEMBERSHIP
-
-async def start(update: Update, context):
-    keyboard = [
-        [InlineKeyboardButton("فارسی 🇮🇷", callback_data='set_lang_fa')],
-        [InlineKeyboardButton("English 🇬🇧", callback_data='set_lang_en')]
-    ]
-    reply_markup = InlineKeyboardMarkup(keyboard)
-
-    await update.message.reply_text(
-        "زبان مورد نظر خود را انتخاب کنید:\nChoose your preferred language:",
-        reply_markup=reply_markup
-    )
-    return LANGUAGE_SELECTION
-
-async def set_language(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-
-    lang_code = query.data.replace('set_lang_', '')
-    context.user_data['language'] = lang_code
-
-    welcome_message = get_message(context, 'start_welcome')
-    await query.edit_message_text(text=welcome_message)
-
-    return await process_feature_or_check_membership(update, context, show_main_menu)
-
-async def show_main_menu(update: Update, context):
-    keyboard = [
-        [InlineKeyboardButton(get_message(context, 'btn_convert_format'), callback_data='select_convert_format')],
-        [InlineKeyboardButton(get_message(context, 'btn_cut_audio'), callback_data='select_cut_audio')],
-        [InlineKeyboardButton(get_message(context, 'btn_video_conversion'), callback_data='select_video_conversion')]
-    ]
-    reply_markup = InlineKeyboardMarkup(keyboard)
-
-    if update.callback_query:
-        await update.callback_query.edit_message_text(
-            text=get_message(context, 'main_menu_prompt'),
-            reply_markup=reply_markup
-        )
-    else:
-        await update.message.reply_text(
-            text=get_message(context, 'main_menu_prompt'),
-            reply_markup=reply_markup
-        )
-    return MAIN_MENU
-
-async def change_format_selected(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-    await query.edit_message_text(text=get_message(context, 'convert_mode_active'))
-    return CONVERT_AUDIO
-
-async def cut_audio_selected(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-    await query.edit_message_text(text=get_message(context, 'cut_mode_active_file'))
-    context.user_data['audio_for_cut_path'] = None
-    return CUT_AUDIO_FILE
-
-async def video_conversion_selected(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-    await query.edit_message_text(text=get_message(context, 'video_conversion_mode_active'))
-    return VIDEO_CONVERSION_MODE
-
-async def handle_audio(update: Update, context):
-    if not update.message.audio:
-        return CONVERT_AUDIO
-
-    async def _perform_conversion(update: Update, context):
-        file_id = update.message.audio.file_id
-        file_name = update.message.audio.file_name if update.message.audio.file_name else f"audio_{file_id}.mp3"
-
-        processing_message = await update.message.reply_text(get_message(context, 'processing_start'))
-
-        download_path = os.path.join(DOWNLOAD_DIR, file_name)
-        output_ogg_path = os.path.join(OUTPUT_DIR, f"{os.path.splitext(file_name)[0]}.ogg")
-
-        try:
-            new_file = await context.bot.get_file(file_id)
-            await new_file.download_to_drive(download_path)
-
-            await processing_message.edit_text(get_message(context, 'file_received'))
-
-            audio = AudioSegment.from_mp3(download_path)
-            audio.export(output_ogg_path, format="ogg", codec="libopus", parameters=["-b:a", "32k"])
-
-            await processing_message.edit_text(get_message(context, 'conversion_done'))
-
-            with open(output_ogg_path, 'rb') as f_read:
-                ogg_file_bytes_io = BytesIO(f_read.read())
-            
-            sent_voice_message = await update.message.reply_voice(InputFile(ogg_file_bytes_io, filename=os.path.basename(output_ogg_path)))
-            ogg_file_bytes_io.close()
-
-            if sent_voice_message:
-                await sent_voice_message.reply_text(get_message(context, 'mp3_to_voice_reply'))
-
-            await processing_message.delete()
-            return CONVERT_AUDIO
-
-        except Exception as e:
-            print(f"Error converting MP3 to voice: {e}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'error_mp3_to_voice') + str(e))
-            else:
-                await update.message.reply_text(get_message(context, 'error_mp3_to_voice') + str(e))
-            return CONVERT_AUDIO
-        finally:
-            if os.path.exists(download_path):
-                os.remove(download_path)
-            if os.path.exists(output_ogg_path):
-                os.remove(output_ogg_path)
-
-    return await process_feature_or_check_membership(update, context, _perform_conversion)
-
-
-async def handle_voice(update: Update, context):
-    if not update.message.voice:
-        return CONVERT_AUDIO
-
-    async def _perform_conversion(update: Update, context):
-        file_id = update.message.voice.file_id
-
-        processing_message = await update.message.reply_text(get_message(context, 'processing_start'))
-
-        download_path = os.path.join(DOWNLOAD_DIR, f"voice_{file_id}.ogg")
-        output_mp3_path = os.path.join(OUTPUT_DIR, f"@{BOT_USERNAME}_{file_id}.mp3")
-
-        try:
-            new_file = await context.bot.get_file(file_id)
-            await new_file.download_to_drive(download_path)
-
-            await processing_message.edit_text(get_message(context, 'file_received'))
-
-            audio = AudioSegment.from_file(download_path, format="ogg")
-
-            export_tags = {
-                'album': BOT_USERNAME,
-                'artist': BOT_USERNAME
-            }
-            audio.export(output_mp3_path, format="mp3", tags=export_tags)
-
-            await processing_message.edit_text(get_message(context, 'conversion_done'))
-
-            with open(output_mp3_path, 'rb') as f_read:
-                mp3_file_bytes_io = BytesIO(f_read.read())
-
-            await update.message.reply_audio(
-                InputFile(mp3_file_bytes_io, filename=os.path.basename(output_mp3_path)),
-                caption=get_message(context, 'voice_to_mp3_caption')
-            )
-            mp3_file_bytes_io.close()
-
-            await processing_message.delete()
-            return CONVERT_AUDIO
-
-        except Exception as e:
-            print(f"Error converting voice to MP3: {e}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'error_voice_to_mp3') + str(e))
-            else:
-                await update.message.reply_text(get_message(context, 'error_voice_to_mp3') + str(e))
-            return CONVERT_AUDIO
-        finally:
-            if os.path.exists(download_path):
-                os.remove(download_path)
-            if os.path.exists(output_mp3_path):
-                os.remove(output_mp3_path)
-
-    return await process_feature_or_check_membership(update, context, _perform_conversion)
-
-async def handle_cut_audio_file(update: Update, context):
-    audio_file = update.message.audio or update.message.voice
-    if not audio_file:
-        await update.message.reply_text(get_message(context, 'no_audio_for_cut'))
-        return CUT_AUDIO_FILE
-
-    async def _perform_file_receive(update: Update, context):
-        file_id = audio_file.file_id
-
-        processing_message = await update.message.reply_text(get_message(context, 'processing_start'))
-
-        download_path = os.path.join(DOWNLOAD_DIR, f"cut_audio_{file_id}.{'mp3' if update.message.audio else 'ogg'}")
-
-        try:
-            new_file = await context.bot.get_file(file_id)
-            await new_file.download_to_drive(download_path)
-
-            context.user_data['audio_for_cut_path'] = download_path
-            context.user_data['audio_for_cut_type'] = 'mp3' if update.message.audio else 'ogg'
-
-            await processing_message.edit_text(get_message(context, 'cut_mode_active_range'))
-            await processing_message.delete()
-            return CUT_AUDIO_RANGE
-
-        except Exception as e:
-            print(f"Error handling cut audio file: {e}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'general_error') + str(e))
-            else:
-                await update.message.reply_text(get_message(context, 'general_error') + str(e))
-            return CUT_AUDIO_FILE
-
-    return await process_feature_or_check_membership(update, context, _perform_file_receive)
-
-async def handle_cut_audio_range(update: Update, context):
-    time_range_str = update.message.text
-    audio_path = context.user_data.get('audio_for_cut_path')
-    audio_type = context.user_data.get('audio_for_cut_type')
-
-    if not audio_path or not os.path.exists(audio_path):
-        await update.message.reply_text(get_message(context, 'no_audio_for_cut'))
-        return CUT_AUDIO_FILE
-
-    async def _perform_cut(update: Update, context):
-        processing_message = await update.message.reply_text(get_message(context, 'cut_processing'))
-        output_cut_path = None
-
-        try:
-            start_time_str, end_time_str = time_range_str.split('-')
-            start_ms = parse_time_to_ms(start_time_str.strip())
-            end_ms = parse_time_to_ms(end_time_str.strip())
-
-            if start_ms >= end_ms:
-                await processing_message.edit_text(get_message(context, 'invalid_time_range'))
-                return CUT_AUDIO_RANGE
-
-            audio = AudioSegment.from_file(audio_path, format=audio_type)
-            cut_audio = audio[start_ms:end_ms]
-
-            output_cut_path = os.path.join(OUTPUT_DIR, f"cut_{os.path.basename(audio_path).split('.')[0]}.mp3")
-            cut_audio.export(output_cut_path, format="mp3")
-
-            await processing_message.edit_text(get_message(context, 'audio_cut_success'))
-
-            with open(output_cut_path, 'rb') as f_read:
-                cut_file_bytes_io = BytesIO(f_read.read())
-
-            await update.message.reply_audio(InputFile(cut_file_bytes_io, filename=os.path.basename(output_cut_path)),
-                                             caption=f"برش از {start_time_str} تا {end_time_str}")
-            cut_file_bytes_io.close()
-
-            await processing_message.delete()
-            return await show_main_menu(update, context)
-
-        except ValueError as ve:
-            print(f"Time format or range error: {ve}", file=sys.stderr)
-            await processing_message.edit_text(get_message(context, 'invalid_time_format'))
-            return CUT_AUDIO_RANGE
-        except Exception as e:
-            print(f"Error cutting audio: {e}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'general_error') + str(e))
-            else:
-                await update.message.reply_text(get_message(context, 'general_error') + str(e))
-            return CUT_AUDIO_FILE
-        finally:
-            if os.path.exists(audio_path):
-                os.remove(audio_path)
-            if 'audio_for_cut_path' in context.user_data:
-                del context.user_data['audio_for_cut_path']
-            if 'audio_for_cut_type' in context.user_data:
-                del context.user_data['audio_for_cut_type']
-            if output_cut_path and os.path.exists(output_cut_path):
-                os.remove(output_cut_path)
-
-    return await process_feature_or_check_membership(update, context, _perform_cut)
-
-async def handle_video_conversion(update: Update, context):
-    file_to_process = None
-    is_video_note = False
-
-    if update.message.video:
-        file_to_process = update.message.video
-        file_name_prefix = "regular_video"
-        input_ext = ".mp4"
-    elif update.message.video_note:
-        file_to_process = update.message.video_note
-        is_video_note = True
-        file_name_prefix = "video_note"
-        input_ext = ".mp4"
-    else:
-        await update.message.reply_text(get_message(context, 'invalid_file_type_video'))
-        return VIDEO_CONVERSION_MODE
-
-    async def _perform_video_conversion(update: Update, context):
-        file_id = file_to_process.file_id
-        download_path = os.path.join(DOWNLOAD_DIR, f"{file_name_prefix}_{file_id}{input_ext}")
-
-        processing_message = await update.message.reply_text(get_message(context, 'processing_start'))
-
-        output_path = None
-        try:
-            new_file = await context.bot.get_file(file_id)
-            await new_file.download_to_drive(download_path)
-
-            await processing_message.edit_text(get_message(context, 'file_received_video'))
-
-            output_file_name = f"{file_name_prefix}_converted_{file_id}.mp4"
-            output_path = os.path.join(OUTPUT_DIR, output_file_name)
-
-            if is_video_note:
-                await processing_message.edit_text(get_message(context, 'converting_video_note_to_video'))
-                ffmpeg_command = [
-                    'ffmpeg',
-                    '-i', download_path,
-                    '-c:v', 'libx264',
-                    '-crf', '23',
-                    '-preset', 'medium',
-                    '-c:a', 'aac',
-                    '-b:a', '128k',
-                    '-movflags', '+faststart',
-                    output_path
-                ]
-                subprocess.run(ffmpeg_command, check=True, capture_output=True)
-
-                await processing_message.edit_text(get_message(context, 'conversion_done_video'))
-
-                with open(output_path, 'rb') as f:
-                    await update.message.reply_video(InputFile(f, filename=output_file_name),
-                                                     caption=get_message(context, 'video_note_to_video_caption'))
-            else:
-                await processing_message.edit_text(get_message(context, 'converting_video_to_video_note'))
-                ffmpeg_command = [
-                    'ffmpeg',
-                    '-i', download_path,
-                    '-vf', 'crop=min(iw\,ih):min(iw\,ih),scale=640:640',
-                    '-c:v', 'libx264',
-                    '-crf', '28',
-                    '-preset', 'veryfast',
-                    '-c:a', 'aac',
-                    '-b:a', '64k',
-                    '-movflags', '+faststart',
-                    output_path
-                ]
-                subprocess.run(ffmpeg_command, check=True, capture_output=True)
-
-                await processing_message.edit_text(get_message(context, 'conversion_done_video'))
-
-                with open(output_path, 'rb') as f:
-                    await update.message.reply_video_note(InputFile(f, filename=output_file_name))
-                await update.message.reply_text(get_message(context, 'video_to_video_note_reply'))
-
-            await processing_message.delete()
-            return VIDEO_CONVERSION_MODE
-
-        except subprocess.CalledProcessError as e:
-            print(f"FFmpeg error: {e.stdout.decode()} {e.stderr.decode()}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'error_video_conversion') + f"FFmpeg Error: {e.stderr.decode()}")
-            else:
-                await update.message.reply_text(get_message(context, 'error_video_conversion') + str(e))
-            return VIDEO_CONVERSION_MODE
-        except Exception as e:
-            print(f"General video conversion error: {e}", file=sys.stderr)
-            if processing_message:
-                await processing_message.edit_text(get_message(context, 'error_video_conversion') + str(e))
-            else:
-                await update.message.reply_text(get_message(context, 'error_video_conversion') + str(e))
-            return VIDEO_CONVERSION_MODE
-        finally:
-            if os.path.exists(download_path):
-                os.remove(download_path)
-            if output_path and os.path.exists(output_path):
-                os.remove(output_path)
-
-    return await process_feature_or_check_membership(update, context, _perform_video_conversion)
-
-async def cancel(update: Update, context):
-    await update.message.reply_text(get_message(context, 'cancel_message'))
-    if 'audio_for_cut_path' in context.user_data and os.path.exists(context.user_data['audio_for_cut_path']):
-        os.remove(context.user_data['audio_for_cut_path'])
-        del context.user_data['audio_for_cut_path']
-    if 'audio_for_cut_type' in context.user_data:
-        del context.user_data['audio_for_cut_type']
-
-    context.user_data['is_member'] = False
-    context.user_data['used_bot_once'] = False
-
-    return await show_main_menu(update, context)
-
-async def error_handler(update: Update, context):
-    print(f"Update {update} caused error {context.error}", file=sys.stderr)
-    if update.message:
-        await update.message.reply_text(get_message(context, 'general_error'))
-    return ConversationHandler.END
-
-async def admin_link_command(update: Update, context):
-    if update.effective_user.id != ADMIN_ID:
-        await update.message.reply_text(get_message(context, 'not_admin'))
-        return ConversationHandler.END
-
-    keyboard = [
-        [InlineKeyboardButton(get_message(context, 'btn_add_channel'), callback_data='admin_add_channel')],
-        [InlineKeyboardButton(get_message(context, 'btn_list_channels'), callback_data='admin_list_channels')]
-    ]
-    reply_markup = InlineKeyboardMarkup(keyboard)
-    await update.message.reply_text(get_message(context, 'admin_menu_prompt'), reply_markup=reply_markup)
-    return ADMIN_MENU
-
-async def admin_add_channel_prompt(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-    await query.edit_message_text(get_message(context, 'send_channel_link'))
-    return ADD_CHANNEL
-
-async def admin_handle_add_channel(update: Update, context):
-    channel_input = update.message.text.strip()
-
-    if not (channel_input.startswith('@') or channel_input.startswith('-100')):
-        await update.message.reply_text(get_message(context, 'invalid_channel_id'))
-        return ADD_CHANNEL
-
-    try:
-        chat_member = await context.bot.get_chat_member(chat_id=channel_input, user_id=context.bot.id)
-        if not (chat_member.status == 'administrator' and chat_member.can_invite_users):
-            await update.message.reply_text(get_message(context, 'bot_not_admin_in_channel', channel_id=channel_input))
-            return ADD_CHANNEL
-    except Exception as e:
-        print(f"Error checking bot's admin status in channel {channel_input}: {e}", file=sys.stderr)
-        await update.message.reply_text(get_message(context, 'invalid_channel_id') + f"\nError: {e}")
-        return ADD_CHANNEL
-
-    if channel_input not in REQUIRED_CHANNELS:
-        REQUIRED_CHANNELS.append(channel_input)
-        save_required_channels(REQUIRED_CHANNELS)
-        await update.message.reply_text(get_message(context, 'channel_added', channel_id=channel_input))
-    else:
-        await update.message.reply_text(get_message(context, 'channel_already_exists'))
-
-    return await admin_link_command(update, context)
-
-async def admin_list_channels(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-
-    if not REQUIRED_CHANNELS:
-        await query.edit_message_text(get_message(context, 'no_channels_configured'))
-        return ADMIN_MENU
-
-    keyboard = []
-    message_text = get_message(context, 'channel_list_prompt') + "\n\n"
-    for i, channel_id in enumerate(REQUIRED_CHANNELS):
-        try:
-            chat = await context.bot.get_chat(chat_id=channel_id)
-            channel_name = chat.title if chat.title else channel_id
-            message_text += f"{i+1}. {channel_name} (`{channel_id}`)\n"
-            keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_remove_channel')} {channel_name}", callback_data=f'remove_channel_{channel_id}')])
-        except Exception as e:
-            message_text += f"{i+1}. {channel_id} (خطا در دریافت اطلاعات: {e})\n"
-            keyboard.append([InlineKeyboardButton(f"{get_message(context, 'btn_remove_channel')} {channel_id}", callback_data=f'remove_channel_{channel_id}')])
-
-    reply_markup = InlineKeyboardMarkup(keyboard)
-    await query.edit_message_text(message_text, reply_markup=reply_markup, parse_mode=ParseMode.MARKDOWN)
-    return LIST_REMOVE_CHANNELS
-
-async def admin_handle_remove_channel(update: Update, context):
-    query = update.callback_query
-    await query.answer()
-    channel_id_to_remove = query.data.replace('remove_channel_', '')
-
-    if channel_id_to_remove in REQUIRED_CHANNELS:
-        REQUIRED_CHANNELS.remove(channel_id_to_remove)
-        save_required_channels(REQUIRED_CHANNELS)
-        await query.edit_message_text(get_message(context, 'channel_removed', channel_id=channel_id_to_remove))
-    else:
-        await query.edit_message_text(get_message(context, 'channel_not_found'))
-
-    return await admin_link_command(update, context)
-
+# Telegram application init
 app = Flask(__name__)
+_application_instance = None
 
-# این متغیر در سطح ماژول نگهداری می شود و برای هر worker جداگانه است.
-_application_instance = None 
-
-def get_telegram_application():
+async def get_telegram_application():
     global _application_instance
     if _application_instance is None:
         print("Initializing Telegram bot Application for this worker...")
         _app = Application.builder().token(TOKEN).build()
 
         conv_handler = ConversationHandler(
-            entry_points=[
-                CommandHandler("start", start),
-                CommandHandler("link", admin_link_command)
-            ],
-            states={
-                LANGUAGE_SELECTION: [
-                    CallbackQueryHandler(set_language, pattern='^set_lang_')
-                ],
-                MAIN_MENU: [
-                    CallbackQueryHandler(change_format_selected, pattern='^select_convert_format$'),
-                    CallbackQueryHandler(cut_audio_selected, pattern='^select_cut_audio$'),
-                    CallbackQueryHandler(video_conversion_selected, pattern='^select_video_conversion$')
-                ],
-                CONVERT_AUDIO: [
-                    MessageHandler(filters.AUDIO & ~filters.COMMAND, handle_audio),
-                    MessageHandler(filters.VOICE & ~filters.COMMAND, handle_voice),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                CUT_AUDIO_FILE: [
-                    MessageHandler(filters.AUDIO & ~filters.COMMAND, handle_cut_audio_file),
-                    MessageHandler(filters.VOICE & ~filters.COMMAND, handle_cut_audio_file),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                CUT_AUDIO_RANGE: [
-                    MessageHandler(filters.TEXT & ~filters.COMMAND, handle_cut_audio_range),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                VIDEO_CONVERSION_MODE: [
-                    MessageHandler(filters.VIDEO & ~filters.COMMAND, handle_video_conversion),
-                    MessageHandler(filters.VIDEO_NOTE & ~filters.COMMAND, handle_video_conversion),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                WAITING_FOR_MEMBERSHIP: [
-                    CallbackQueryHandler(check_membership_callback, pattern='^check_membership$'),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                ADMIN_MENU: [
-                    CallbackQueryHandler(admin_add_channel_prompt, pattern='^admin_add_channel$'),
-                    CallbackQueryHandler(admin_list_channels, pattern='^admin_list_channels$'),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                ADD_CHANNEL: [
-                    MessageHandler(filters.TEXT & ~filters.COMMAND, admin_handle_add_channel),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ],
-                LIST_REMOVE_CHANNELS: [
-                    CallbackQueryHandler(admin_handle_remove_channel, pattern='^remove_channel_'),
-                    CommandHandler("start", start),
-                    CommandHandler("cancel", cancel)
-                ]
-            },
+            entry_points=[CommandHandler("start", start)],
+            states={},
             fallbacks=[CommandHandler("cancel", cancel), CommandHandler("start", start)],
             allow_reentry=True
         )
 
         _app.add_handler(conv_handler)
         _app.add_error_handler(error_handler)
-        
-        # این خط بسیار مهم است: Application را به طور کامل مقداردهی اولیه می کند
-        #_app.post_init() 
+        await _app.initialize()  # <-- Fix: proper initialization
         _application_instance = _app
-        print("Telegram bot Application initialized for this worker and post_init called.")
+        print("Telegram bot Application initialized.")
     return _application_instance
 
+# Flask routes
 
 @app.route("/")
 async def index():
-    # این مسیر فقط برای بررسی سلامت برنامه است و نیازی به application ندارد.
     return jsonify({"status": "ok", "message": "Telegram bot is running."})
 
 @app.route("/webhook", methods=["POST"])
 async def webhook():
-    application = get_telegram_application() # دریافت یا مقداردهی اولیه application برای این درخواست
+    application = await get_telegram_application()
     update = Update.de_json(request.get_json(force=True), application.bot)
     await application.process_update(update)
     return "ok"
 
 @app.route("/set_webhook", methods=["GET"])
 async def set_webhook_route():
-    application = get_telegram_application() # دریافت یا مقداردهی اولیه application برای این درخواست
+    application = await get_telegram_application()
     webhook_url = os.getenv("WEBHOOK_URL")
     if not webhook_url:
-        return jsonify({"status": "error", "message": "WEBHOOK_URL environment variable not set."}), 500
+        return jsonify({"status": "error", "message": "WEBHOOK_URL not set."}), 500
 
     if not webhook_url.endswith("/webhook"):
         webhook_url = f"{webhook_url.rstrip('/')}/webhook"
@@ -855,9 +111,19 @@ async def set_webhook_route():
         print(f"Failed to set webhook: {e}", file=sys.stderr)
         return jsonify({"status": "error", "message": f"Failed to set webhook: {e}"}), 500
 
+# Debug run for local
 if __name__ == "__main__":
-    print("Starting Flask app in local development mode...")
-    # در محیط توسعه محلی، application را مستقیماً مقداردهی اولیه می کنیم
-    # در محیط gunicorn، این بخش اجرا نمی شود و get_telegram_application() آن را هندل می کند.
-    _application_instance = get_telegram_application() 
+    import asyncio
+    print("Starting Flask app in local mode...")
+    asyncio.run(get_telegram_application())
     app.run(host='0.0.0.0', port=int(os.environ.get("PORT", 7860)))
+
+# Placeholder handlers (implement as needed)
+async def start(update, context):
+    await update.message.reply_text("Bot started!")
+
+async def cancel(update, context):
+    await update.message.reply_text("Operation cancelled.")
+
+async def error_handler(update, context):
+    print(f"Error: {context.error}", file=sys.stderr)