Telethon/telethon/events/messagedeleted.py

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from .common import EventBuilder, EventCommon, name_inner_event
from ..tl import types
@name_inner_event
class MessageDeleted(EventBuilder):
"""
Occurs whenever a message is deleted. Note that this event isn't 100%
reliable, since Telegram doesn't always notify the clients that a message
was deleted.
.. important::
Telegram **does not** send information about *where* a message
was deleted if it occurs in private conversations with other users
or in small group chats, because message IDs are *unique* and you
can identify the chat with the message ID alone if you saved it
previously.
Telethon **does not** save information of where messages occur,
so it cannot know in which chat a message was deleted (this will
only work in channels, where the channel ID *is* present).
This means that the ``chats=`` parameter will not work reliably,
unless you intend on working with channels and super-groups only.
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Example
.. code-block:: python
from telethon import events
@client.on(events.MessageDeleted)
async def handler(event):
# Log all deleted message IDs
for msg_id in event.deleted_ids:
print('Message', msg_id, 'was deleted in', event.chat_id)
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"""
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@classmethod
def build(cls, update, others=None, self_id=None):
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if isinstance(update, types.UpdateDeleteMessages):
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return cls.Event(
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deleted_ids=update.messages,
peer=None
)
elif isinstance(update, types.UpdateDeleteChannelMessages):
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return cls.Event(
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deleted_ids=update.messages,
peer=types.PeerChannel(update.channel_id)
)
class Event(EventCommon):
def __init__(self, deleted_ids, peer):
super().__init__(
chat_peer=peer, msg_id=(deleted_ids or [0])[0]
)
self.deleted_id = None if not deleted_ids else deleted_ids[0]
self.deleted_ids = deleted_ids