text: #  Pyrogram - Telegram MTProto API Client Library for Python
  #  Copyright (C) 2017-2021 Dan <https://github.com/delivrance>
  #
  #  This file is part of Pyrogram.
  #
  #  Pyrogram is free software: you can redistribute it and/or modify
  #  it under the terms of the GNU Lesser General Public License as published
  #  by the Free Software Foundation, either version 3 of the License, or
  #  (at your option) any later version.
  #
  #  Pyrogram is distributed in the hope that it will be useful,
  #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #  GNU Lesser General Public License for more details.
  #
  #  You should have received a copy of the GNU Lesser General Public License
  #  along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
  
  from typing import Union, AsyncGenerator, Optional
  
  from pyrogram import types
  from pyrogram.scaffold import Scaffold
  
  
  class IterProfilePhotos(Scaffold):
      async def iter_profile_photos(
          self,
          chat_id: Union[int, str],
          offset: int = 0,
          limit: int = 0,
      ) -> Optional[AsyncGenerator["types.Message", None]]:
          """Iterate through a chat or a user profile photos sequentially.
  
          This convenience method does the same as repeatedly calling :meth:`~pyrogram.Client.get_profile_photos` in a
          loop, thus saving you from the hassle of setting up boilerplate code. It is useful for getting all the profile
          photos with a single call.
  
          Parameters:
              chat_id (``int`` | ``str``):
                  Unique identifier (int) or username (str) of the target chat.
                  For your personal cloud (Saved Messages) you can simply use "me" or "self".
                  For a contact that exists in your Telegram address book you can use his phone number (str).
  
              limit (``int``, *optional*):
                  Limits the number of profile photos to be retrieved.
                  By default, no limit is applied and all profile photos are returned.
  
              offset (``int``, *optional*):
                  Sequential number of the first profile photo to be returned.
  
          Returns:
              ``Generator``: A generator yielding :obj:`~pyrogram.types.Photo` objects.
  
          Example:
              .. code-block:: python
  
                  for photo in app.iter_profile_photos("haskell"):
                      print(photo.file_id)
          """
          current = 0
          total = limit or (1 << 31)
          limit = min(100, total)
  
          while True:
              photos = await self.get_profile_photos(
                  chat_id=chat_id,
                  offset=offset,
                  limit=limit
              )
  
              if not photos:
                  return
  
              offset += len(photos)
  
              for photo in photos:
                  yield photo
  
                  current += 1
  
                  if current >= total:
                      return
  