import asyncio import re from .common import EventBuilder, EventCommon, name_inner_event, _into_id_set from ..tl import types @name_inner_event class NewMessage(EventBuilder): """ Occurs whenever a new text message or a message with media arrives. Args: incoming (`bool`, optional): If set to `True`, only **incoming** messages will be handled. Mutually exclusive with ``outgoing`` (can only set one of either). outgoing (`bool`, optional): If set to `True`, only **outgoing** messages will be handled. Mutually exclusive with ``incoming`` (can only set one of either). from_users (`entity`, optional): Unlike `chats`, this parameter filters the *senders* of the message. That is, only messages *sent by these users* will be handled. Use `chats` if you want private messages with this/these users. `from_users` lets you filter by messages sent by *one or more* users across the desired chats (doesn't need a list). forwards (`bool`, optional): Whether forwarded messages should be handled or not. By default, both forwarded and normal messages are included. If it's `True` *only* forwards will be handled. If it's `False` only messages that are *not* forwards will be handled. pattern (`str`, `callable`, `Pattern`, optional): If set, only messages matching this pattern will be handled. You can specify a regex-like string which will be matched against the message, a callable function that returns `True` if a message is acceptable, or a compiled regex pattern. """ def __init__(self, chats=None, *, blacklist_chats=False, func=None, incoming=None, outgoing=None, from_users=None, forwards=None, pattern=None): if incoming and outgoing: incoming = outgoing = None # Same as no filter elif incoming is not None and outgoing is None: outgoing = not incoming elif outgoing is not None and incoming is None: incoming = not outgoing elif all(x is not None and not x for x in (incoming, outgoing)): raise ValueError("Don't create an event handler if you " "don't want neither incoming nor outgoing!") super().__init__(chats, blacklist_chats=blacklist_chats, func=func) self.incoming = incoming self.outgoing = outgoing self.from_users = from_users self.forwards = forwards if isinstance(pattern, str): self.pattern = re.compile(pattern).match elif not pattern or callable(pattern): self.pattern = pattern elif hasattr(pattern, 'match') and callable(pattern.match): self.pattern = pattern.match else: raise TypeError('Invalid pattern type given') # Should we short-circuit? E.g. perform no check at all self._no_check = all(x is None for x in ( self.chats, self.incoming, self.outgoing, self.pattern, self.from_users, self.forwards, self.from_users, self.func )) async def _resolve(self, client): await super()._resolve(client) self.from_users = await _into_id_set(client, self.from_users) @classmethod def build(cls, update, others=None, self_id=None): if isinstance(update, (types.UpdateNewMessage, types.UpdateNewChannelMessage)): if not isinstance(update.message, types.Message): return # We don't care about MessageService's here event = cls.Event(update.message) elif isinstance(update, types.UpdateShortMessage): event = cls.Event(types.Message( out=update.out, mentioned=update.mentioned, media_unread=update.media_unread, silent=update.silent, id=update.id, # Note that to_id/from_id complement each other in private # messages, depending on whether the message was outgoing. to_id=types.PeerUser(update.user_id if update.out else self_id), from_id=self_id if update.out else update.user_id, message=update.message, date=update.date, fwd_from=update.fwd_from, via_bot_id=update.via_bot_id, reply_to_msg_id=update.reply_to_msg_id, entities=update.entities )) elif isinstance(update, types.UpdateShortChatMessage): event = cls.Event(types.Message( out=update.out, mentioned=update.mentioned, media_unread=update.media_unread, silent=update.silent, id=update.id, from_id=update.from_id, to_id=types.PeerChat(update.chat_id), message=update.message, date=update.date, fwd_from=update.fwd_from, via_bot_id=update.via_bot_id, reply_to_msg_id=update.reply_to_msg_id, entities=update.entities )) else: return # Make messages sent to ourselves outgoing unless they're forwarded. # This makes it consistent with official client's appearance. ori = event.message if isinstance(ori.to_id, types.PeerUser): if ori.from_id == ori.to_id.user_id and not ori.fwd_from: event.message.out = True return event def filter(self, event): if self._no_check: return event if self.incoming and event.message.out: return if self.outgoing and not event.message.out: return if self.forwards is not None: if bool(self.forwards) != bool(event.message.fwd_from): return if self.from_users is not None: if event.message.from_id not in self.from_users: return if self.pattern: match = self.pattern(event.message.message or '') if not match: return event.pattern_match = match return super().filter(event) class Event(EventCommon): """ Represents the event of a new message. This event can be treated to all effects as a `Message `, so please **refer to its documentation** to know what you can do with this event. Members: message (`Message `): This is the only difference with the received `Message `, and will return the `telethon.tl.custom.message.Message` itself, not the text. See `Message ` for the rest of available members and methods. pattern_match (`obj`): The resulting object from calling the passed ``pattern`` function. Here's an example using a string (defaults to regex match): >>> from telethon import TelegramClient, events >>> client = TelegramClient(...) >>> >>> @client.on(events.NewMessage(pattern=r'hi (\\w+)!')) ... async def handler(event): ... # In this case, the result is a ``Match`` object ... # since the `str` pattern was converted into ... # the ``re.compile(pattern).match`` function. ... print('Welcomed', event.pattern_match.group(1)) ... >>> """ def __init__(self, message): self.__dict__['_init'] = False if not message.out and isinstance(message.to_id, types.PeerUser): # Incoming message (e.g. from a bot) has to_id=us, and # from_id=bot (the actual "chat" from a user's perspective). chat_peer = types.PeerUser(message.from_id) else: chat_peer = message.to_id super().__init__(chat_peer=chat_peer, msg_id=message.id, broadcast=bool(message.post)) self.pattern_match = None self.message = message def _set_client(self, client): super()._set_client(client) m = self.message m._finish_init(client, self._entities, None) self.__dict__['_init'] = True # No new attributes can be set def __getattr__(self, item): if item in self.__dict__: return self.__dict__[item] else: return getattr(self.message, item) def __setattr__(self, name, value): if not self.__dict__['_init'] or name in self.__dict__: self.__dict__[name] = value else: setattr(self.message, name, value)