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274 lines
13 KiB
Python
274 lines
13 KiB
Python
#!/usr/bin/env python
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#
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# A library that provides a Python interface to the Telegram Bot API
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# Copyright (C) 2015-2024
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# Leandro Toledo de Souza <devs@python-telegram-bot.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser Public License for more details.
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#
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# You should have received a copy of the GNU Lesser Public License
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# along with this program. If not, see [http://www.gnu.org/licenses/].
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"""This module contains an object that represents a Telegram MessageEntity."""
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import copy
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import itertools
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from typing import TYPE_CHECKING, Dict, Final, List, Optional, Sequence
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from telegram import constants
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from telegram._telegramobject import TelegramObject
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from telegram._user import User
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from telegram._utils import enum
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from telegram._utils.strings import TextEncoding
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from telegram._utils.types import JSONDict
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if TYPE_CHECKING:
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from telegram import Bot
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class MessageEntity(TelegramObject):
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"""
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This object represents one special entity in a text message. For example, hashtags,
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usernames, URLs, etc.
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Objects of this class are comparable in terms of equality. Two objects of this class are
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considered equal, if their :attr:`type`, :attr:`offset` and :attr:`length` are equal.
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Args:
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type (:obj:`str`): Type of the entity. Can be :attr:`MENTION` (@username),
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:attr:`HASHTAG` (#hashtag), :attr:`CASHTAG` ($USD), :attr:`BOT_COMMAND`
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(/start@jobs_bot), :attr:`URL` (https://telegram.org),
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:attr:`EMAIL` (do-not-reply@telegram.org), :attr:`PHONE_NUMBER` (+1-212-555-0123),
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:attr:`BOLD` (**bold text**), :attr:`ITALIC` (*italic text*), :attr:`UNDERLINE`
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(underlined text), :attr:`STRIKETHROUGH`, :attr:`SPOILER` (spoiler message),
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:attr:`BLOCKQUOTE` (block quotation), :attr:`CODE` (monowidth string), :attr:`PRE`
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(monowidth block), :attr:`TEXT_LINK` (for clickable text URLs), :attr:`TEXT_MENTION`
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(for users without usernames), :attr:`CUSTOM_EMOJI` (for inline custom emoji stickers).
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.. versionadded:: 20.0
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Added inline custom emoji
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.. versionadded:: 20.8
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Added block quotation
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offset (:obj:`int`): Offset in UTF-16 code units to the start of the entity.
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length (:obj:`int`): Length of the entity in UTF-16 code units.
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url (:obj:`str`, optional): For :attr:`TEXT_LINK` only, url that will be opened after
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user taps on the text.
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user (:class:`telegram.User`, optional): For :attr:`TEXT_MENTION` only, the mentioned
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user.
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language (:obj:`str`, optional): For :attr:`PRE` only, the programming language of
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the entity text.
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custom_emoji_id (:obj:`str`, optional): For :attr:`CUSTOM_EMOJI` only, unique identifier
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of the custom emoji. Use :meth:`telegram.Bot.get_custom_emoji_stickers` to get full
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information about the sticker.
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.. versionadded:: 20.0
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Attributes:
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type (:obj:`str`): Type of the entity. Can be :attr:`MENTION` (@username),
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:attr:`HASHTAG` (#hashtag), :attr:`CASHTAG` ($USD), :attr:`BOT_COMMAND`
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(/start@jobs_bot), :attr:`URL` (https://telegram.org),
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:attr:`EMAIL` (do-not-reply@telegram.org), :attr:`PHONE_NUMBER` (+1-212-555-0123),
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:attr:`BOLD` (**bold text**), :attr:`ITALIC` (*italic text*), :attr:`UNDERLINE`
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(underlined text), :attr:`STRIKETHROUGH`, :attr:`SPOILER` (spoiler message),
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:attr:`BLOCKQUOTE` (block quotation), :attr:`CODE` (monowidth string), :attr:`PRE`
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(monowidth block), :attr:`TEXT_LINK` (for clickable text URLs), :attr:`TEXT_MENTION`
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(for users without usernames), :attr:`CUSTOM_EMOJI` (for inline custom emoji stickers).
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.. versionadded:: 20.0
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Added inline custom emoji
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.. versionadded:: 20.8
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Added block quotation
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offset (:obj:`int`): Offset in UTF-16 code units to the start of the entity.
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length (:obj:`int`): Length of the entity in UTF-16 code units.
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url (:obj:`str`): Optional. For :attr:`TEXT_LINK` only, url that will be opened after
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user taps on the text.
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user (:class:`telegram.User`): Optional. For :attr:`TEXT_MENTION` only, the mentioned
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user.
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language (:obj:`str`): Optional. For :attr:`PRE` only, the programming language of
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the entity text.
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custom_emoji_id (:obj:`str`): Optional. For :attr:`CUSTOM_EMOJI` only, unique identifier
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of the custom emoji. Use :meth:`telegram.Bot.get_custom_emoji_stickers` to get full
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information about the sticker.
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.. versionadded:: 20.0
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"""
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__slots__ = ("custom_emoji_id", "language", "length", "offset", "type", "url", "user")
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def __init__(
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self,
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type: str, # pylint: disable=redefined-builtin
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offset: int,
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length: int,
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url: Optional[str] = None,
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user: Optional[User] = None,
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language: Optional[str] = None,
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custom_emoji_id: Optional[str] = None,
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*,
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api_kwargs: Optional[JSONDict] = None,
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):
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super().__init__(api_kwargs=api_kwargs)
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# Required
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self.type: str = enum.get_member(constants.MessageEntityType, type, type)
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self.offset: int = offset
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self.length: int = length
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# Optionals
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self.url: Optional[str] = url
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self.user: Optional[User] = user
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self.language: Optional[str] = language
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self.custom_emoji_id: Optional[str] = custom_emoji_id
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self._id_attrs = (self.type, self.offset, self.length)
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self._freeze()
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@classmethod
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def de_json(
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cls, data: Optional[JSONDict], bot: Optional["Bot"] = None
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) -> Optional["MessageEntity"]:
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"""See :meth:`telegram.TelegramObject.de_json`."""
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data = cls._parse_data(data)
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if not data:
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return None
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data["user"] = User.de_json(data.get("user"), bot)
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return super().de_json(data=data, bot=bot)
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@staticmethod
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def adjust_message_entities_to_utf_16(
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text: str, entities: Sequence["MessageEntity"]
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) -> Sequence["MessageEntity"]:
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"""Utility functionality for converting the offset and length of entities from
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Unicode (:obj:`str`) to UTF-16 (``utf-16-le`` encoded :obj:`bytes`).
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Tip:
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Only the offsets and lengths calulated in UTF-16 is acceptable by the Telegram Bot API.
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If they are calculated using the Unicode string (:obj:`str` object), errors may occur
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when the text contains characters that are not in the Basic Multilingual Plane (BMP).
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For more information, see `Unicode <https://en.wikipedia.org/wiki/Unicode>`_ and
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`Plane (Unicode) <https://en.wikipedia.org/wiki/Plane_(Unicode)>`_.
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.. versionadded:: 21.4
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Examples:
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Below is a snippet of code that demonstrates how to use this function to convert
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entities from Unicode to UTF-16 space. The ``unicode_entities`` are calculated in
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Unicode and the `utf_16_entities` are calculated in UTF-16.
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.. code-block:: python
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text = "𠌕 bold 𝄢 italic underlined: 𝛙𝌢𑁍"
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unicode_entities = [
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MessageEntity(offset=2, length=4, type=MessageEntity.BOLD),
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MessageEntity(offset=9, length=6, type=MessageEntity.ITALIC),
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MessageEntity(offset=28, length=3, type=MessageEntity.UNDERLINE),
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]
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utf_16_entities = MessageEntity.adjust_message_entities_to_utf_16(
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text, unicode_entities
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)
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await bot.send_message(
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chat_id=123,
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text=text,
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entities=utf_16_entities,
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)
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# utf_16_entities[0]: offset=3, length=4
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# utf_16_entities[1]: offset=11, length=6
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# utf_16_entities[2]: offset=30, length=6
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Args:
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text (:obj:`str`): The text that the entities belong to
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entities (Sequence[:class:`telegram.MessageEntity`]): Sequence of entities
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with offset and length calculated in Unicode
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Returns:
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Sequence[:class:`telegram.MessageEntity`]: Sequence of entities
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with offset and length calculated in UTF-16 encoding
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"""
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# get sorted positions
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positions = sorted(itertools.chain(*((x.offset, x.offset + x.length) for x in entities)))
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accumulated_length = 0
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# calculate the length of each slice text[:position] in utf-16 accordingly,
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# store the position translations
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position_translation: Dict[int, int] = {}
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for i, position in enumerate(positions):
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last_position = positions[i - 1] if i > 0 else 0
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text_slice = text[last_position:position]
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accumulated_length += len(text_slice.encode(TextEncoding.UTF_16_LE)) // 2
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position_translation[position] = accumulated_length
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# get the final output entites
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out = []
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for entity in entities:
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translated_positions = position_translation[entity.offset]
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translated_length = (
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position_translation[entity.offset + entity.length] - translated_positions
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)
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new_entity = copy.copy(entity)
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with new_entity._unfrozen():
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new_entity.offset = translated_positions
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new_entity.length = translated_length
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out.append(new_entity)
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return out
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ALL_TYPES: Final[List[str]] = list(constants.MessageEntityType)
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"""List[:obj:`str`]: A list of all available message entity types."""
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BLOCKQUOTE: Final[str] = constants.MessageEntityType.BLOCKQUOTE
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""":const:`telegram.constants.MessageEntityType.BLOCKQUOTE`
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.. versionadded:: 20.8
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"""
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BOLD: Final[str] = constants.MessageEntityType.BOLD
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""":const:`telegram.constants.MessageEntityType.BOLD`"""
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BOT_COMMAND: Final[str] = constants.MessageEntityType.BOT_COMMAND
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""":const:`telegram.constants.MessageEntityType.BOT_COMMAND`"""
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CASHTAG: Final[str] = constants.MessageEntityType.CASHTAG
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""":const:`telegram.constants.MessageEntityType.CASHTAG`"""
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CODE: Final[str] = constants.MessageEntityType.CODE
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""":const:`telegram.constants.MessageEntityType.CODE`"""
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CUSTOM_EMOJI: Final[str] = constants.MessageEntityType.CUSTOM_EMOJI
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""":const:`telegram.constants.MessageEntityType.CUSTOM_EMOJI`
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.. versionadded:: 20.0
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"""
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EMAIL: Final[str] = constants.MessageEntityType.EMAIL
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""":const:`telegram.constants.MessageEntityType.EMAIL`"""
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EXPANDABLE_BLOCKQUOTE: Final[str] = constants.MessageEntityType.EXPANDABLE_BLOCKQUOTE
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""":const:`telegram.constants.MessageEntityType.EXPANDABLE_BLOCKQUOTE`
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.. versionadded:: 21.3
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"""
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HASHTAG: Final[str] = constants.MessageEntityType.HASHTAG
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""":const:`telegram.constants.MessageEntityType.HASHTAG`"""
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ITALIC: Final[str] = constants.MessageEntityType.ITALIC
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""":const:`telegram.constants.MessageEntityType.ITALIC`"""
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MENTION: Final[str] = constants.MessageEntityType.MENTION
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""":const:`telegram.constants.MessageEntityType.MENTION`"""
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PHONE_NUMBER: Final[str] = constants.MessageEntityType.PHONE_NUMBER
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""":const:`telegram.constants.MessageEntityType.PHONE_NUMBER`"""
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PRE: Final[str] = constants.MessageEntityType.PRE
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""":const:`telegram.constants.MessageEntityType.PRE`"""
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SPOILER: Final[str] = constants.MessageEntityType.SPOILER
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""":const:`telegram.constants.MessageEntityType.SPOILER`
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.. versionadded:: 13.10
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"""
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STRIKETHROUGH: Final[str] = constants.MessageEntityType.STRIKETHROUGH
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""":const:`telegram.constants.MessageEntityType.STRIKETHROUGH`"""
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TEXT_LINK: Final[str] = constants.MessageEntityType.TEXT_LINK
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""":const:`telegram.constants.MessageEntityType.TEXT_LINK`"""
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TEXT_MENTION: Final[str] = constants.MessageEntityType.TEXT_MENTION
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""":const:`telegram.constants.MessageEntityType.TEXT_MENTION`"""
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UNDERLINE: Final[str] = constants.MessageEntityType.UNDERLINE
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""":const:`telegram.constants.MessageEntityType.UNDERLINE`"""
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URL: Final[str] = constants.MessageEntityType.URL
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""":const:`telegram.constants.MessageEntityType.URL`"""
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