#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2020
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Public License for more details.
#
# You should have received a copy of the GNU Lesser Public License
# along with this program.  If not, see [http://www.gnu.org/licenses/].
"""This module contains an object that represents a Telegram KeyboardButton."""

from telegram import TelegramObject


class KeyboardButton(TelegramObject):
    """
    This object represents one button of the reply keyboard. For simple text buttons String can be
    used instead of this object to specify text of the button.

    Note:
        Optional fields are mutually exclusive.

    Attributes:
        text (:obj:`str`): Text of the button.
        request_contact (:obj:`bool`): Optional. The user's phone number will be sent.
        request_location (:obj:`bool`): Optional. The user's current location will be sent.
        request_poll (:class:`KeyboardButtonPollType`): Optional. If the user should create a poll.

    Args:
        text (:obj:`str`): Text of the button. If none of the optional fields are used, it will be
            sent to the bot as a message when the button is pressed.
        request_contact (:obj:`bool`, optional): If :obj:`True`, the user's phone number will be
            sent as a contact when the button is pressed. Available in private chats only.
        request_location (:obj:`bool`, optional): If :obj:`True`, the user's current location will
            be sent when the button is pressed. Available in private chats only.
        request_poll (:class:`KeyboardButtonPollType`, optional): If specified, the user will be
            asked to create a poll and send it to the bot when the button is pressed. Available in
            private chats only.

    Note:
        :attr:`request_contact` and :attr:`request_location` options will only work in Telegram
        versions released after 9 April, 2016. Older clients will ignore them.

        :attr:`request_poll` option will only work in Telegram versions released after 23 January,
        2020. Older clients will receive unsupported message.

    """

    def __init__(self, text, request_contact=None, request_location=None, request_poll=None,
                 **kwargs):
        # Required
        self.text = text
        # Optionals
        self.request_contact = request_contact
        self.request_location = request_location
        self.request_poll = request_poll