Telethon/telethon/client/buttons.py

from .updates import UpdateMethods
from ..tl import types, custom
from .. import utils, events


class ButtonMethods(UpdateMethods):
    def _build_reply_markup(self, buttons):
        if buttons is None:
            return None

        try:
            if buttons.SUBCLASS_OF_ID == 0xe2e10ef2:
                return buttons  # crc32(b'ReplyMarkup'):
        except AttributeError:
            pass

        if not utils.is_list_like(buttons):
            buttons = [[buttons]]
        elif not utils.is_list_like(buttons[0]):
            buttons = [buttons]

        is_inline = False
        is_normal = False

        rows = []
        for row in buttons:
            current = []
            for button in row:
                inline = custom.Button._is_inline(button)
                is_inline |= inline
                is_normal |= not inline
                if isinstance(button, custom.Button):
                    if button.callback:
                        self.add_event_handler(
                            button.callback,
                            events.CallbackQuery(data=button.data)
                        )

                    button = button.button

                if button.SUBCLASS_OF_ID == 0xbad74a3:
                    # 0xbad74a3 == crc32(b'KeyboardButton')
                    current.append(button)

            if current:
                rows.append(types.KeyboardButtonRow(current))

        if is_inline == is_normal and is_normal:
            raise ValueError('You cannot mix inline with normal buttons')
        elif is_inline:
            return types.ReplyInlineMarkup(rows)
        elif is_normal:
            return types.ReplyKeyboardMarkup(rows)