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233 lines
8.1 KiB
ReStructuredText
233 lines
8.1 KiB
ReStructuredText
===============================
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Working with Chats and Channels
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===============================
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.. note::
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These examples assume you have read :ref:`accessing-the-full-api`.
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Joining a chat or channel
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*************************
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Note that `Chat`__\ s are normal groups, and `Channel`__\ s are a
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special form of `Chat`__\ s,
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which can also be super-groups if their ``megagroup`` member is
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``True``.
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Joining a public channel
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************************
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Once you have the :ref:`entity <entities>` of the channel you want to join
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to, you can make use of the `JoinChannelRequest`__ to join such channel:
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.. code-block:: python
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from telethon.tl.functions.channels import JoinChannelRequest
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client(JoinChannelRequest(channel))
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# In the same way, you can also leave such channel
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from telethon.tl.functions.channels import LeaveChannelRequest
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client(LeaveChannelRequest(input_channel))
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For more on channels, check the `channels namespace`__.
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Joining a private chat or channel
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*********************************
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If all you have is a link like this one:
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``https://t.me/joinchat/AAAAAFFszQPyPEZ7wgxLtd``, you already have
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enough information to join! The part after the
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``https://t.me/joinchat/``, this is, ``AAAAAFFszQPyPEZ7wgxLtd`` on this
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example, is the ``hash`` of the chat or channel. Now you can use
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`ImportChatInviteRequest`__ as follows:
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.. code-block:: python
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from telethon.tl.functions.messages import ImportChatInviteRequest
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updates = client(ImportChatInviteRequest('AAAAAEHbEkejzxUjAUCfYg'))
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Adding someone else to such chat or channel
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*******************************************
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If you don't want to add yourself, maybe because you're already in,
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you can always add someone else with the `AddChatUserRequest`__,
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which use is very straightforward:
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.. code-block:: python
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from telethon.tl.functions.messages import AddChatUserRequest
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client(AddChatUserRequest(
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chat_id,
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user_to_add,
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fwd_limit=10 # Allow the user to see the 10 last messages
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))
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Checking a link without joining
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*******************************
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If you don't need to join but rather check whether it's a group or a
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channel, you can use the `CheckChatInviteRequest`__, which takes in
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the hash of said channel or group.
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__ https://lonamiwebs.github.io/Telethon/constructors/chat.html
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__ https://lonamiwebs.github.io/Telethon/constructors/channel.html
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__ https://lonamiwebs.github.io/Telethon/types/chat.html
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__ https://lonamiwebs.github.io/Telethon/methods/channels/join_channel.html
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__ https://lonamiwebs.github.io/Telethon/methods/channels/index.html
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__ https://lonamiwebs.github.io/Telethon/methods/messages/import_chat_invite.html
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__ https://lonamiwebs.github.io/Telethon/methods/messages/add_chat_user.html
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__ https://lonamiwebs.github.io/Telethon/methods/messages/check_chat_invite.html
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Retrieving all chat members (channels too)
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******************************************
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In order to get all the members from a mega-group or channel, you need
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to use `GetParticipantsRequest`__. As we can see it needs an
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`InputChannel`__, (passing the mega-group or channel you're going to
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use will work), and a mandatory `ChannelParticipantsFilter`__. The
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closest thing to "no filter" is to simply use
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`ChannelParticipantsSearch`__ with an empty ``'q'`` string.
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If we want to get *all* the members, we need to use a moving offset and
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a fixed limit:
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.. code-block:: python
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from telethon.tl.functions.channels import GetParticipantsRequest
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from telethon.tl.types import ChannelParticipantsSearch
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from time import sleep
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offset = 0
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limit = 100
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all_participants = []
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while True:
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participants = client(GetParticipantsRequest(
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channel, ChannelParticipantsSearch(''), offset, limit,
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hash=0
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))
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if not participants.users:
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break
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all_participants.extend(participants.users)
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offset += len(participants.users)
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.. note::
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It is **not** possible to get more than 10,000 members from a
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group. It's a hard limit impossed by Telegram and there is
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nothing you can do about it. Refer to `issue 573`__ for more.
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Note that ``GetParticipantsRequest`` returns `ChannelParticipants`__,
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which may have more information you need (like the role of the
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participants, total count of members, etc.)
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__ https://lonamiwebs.github.io/Telethon/methods/channels/get_participants.html
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__ https://lonamiwebs.github.io/Telethon/methods/channels/get_participants.html
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__ https://lonamiwebs.github.io/Telethon/types/channel_participants_filter.html
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__ https://lonamiwebs.github.io/Telethon/constructors/channel_participants_search.html
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__ https://lonamiwebs.github.io/Telethon/constructors/channels/channel_participants.html
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__ https://github.com/LonamiWebs/Telethon/issues/573
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Recent Actions
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**************
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"Recent actions" is simply the name official applications have given to
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the "admin log". Simply use `GetAdminLogRequest`__ for that, and
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you'll get AdminLogResults.events in return which in turn has the final
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`.action`__.
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__ https://lonamiwebs.github.io/Telethon/methods/channels/get_admin_log.html
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__ https://lonamiwebs.github.io/Telethon/types/channel_admin_log_event_action.html
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Admin Permissions
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*****************
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Giving or revoking admin permissions can be done with the `EditAdminRequest`__:
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.. code-block:: python
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from telethon.tl.functions.channels import EditAdminRequest
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from telethon.tl.types import ChannelAdminRights
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# You need both the channel and who to grant permissions
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# They can either be channel/user or input channel/input user.
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#
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# ChannelAdminRights is a list of granted permissions.
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# Set to True those you want to give.
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rights = ChannelAdminRights(
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post_messages=None,
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add_admins=None,
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invite_users=None,
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change_info=True,
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ban_users=None,
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delete_messages=True,
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pin_messages=True,
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invite_link=None,
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edit_messages=None
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)
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# Equivalent to:
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# rights = ChannelAdminRights(
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# change_info=True,
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# delete_messages=True,
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# pin_messages=True
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# )
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# Once you have a ChannelAdminRights, invoke it
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client(EditAdminRequest(channel, user, rights))
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# User will now be able to change group info, delete other people's
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# messages and pin messages.
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| Thanks to `@Kyle2142`__ for `pointing out`__ that you **cannot** set all
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| parameters to ``True`` to give a user full permissions, as not all
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| permissions are related to both broadcast channels/megagroups.
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| E.g. trying to set ``post_messages=True`` in a megagroup will raise an
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| error. It is recommended to always use keyword arguments, and to set only
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| the permissions the user needs. If you don't need to change a permission,
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| it can be omitted (full list `here`__).
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__ https://lonamiwebs.github.io/Telethon/methods/channels/edit_admin.html
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__ https://github.com/Kyle2142
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__ https://github.com/LonamiWebs/Telethon/issues/490
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__ https://lonamiwebs.github.io/Telethon/constructors/channel_admin_rights.html
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Increasing View Count in a Channel
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**********************************
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It has been asked `quite`__ `a few`__ `times`__ (really, `many`__), and
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while I don't understand why so many people ask this, the solution is to
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use `GetMessagesViewsRequest`__, setting ``increment=True``:
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.. code-block:: python
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# Obtain `channel' through dialogs or through client.get_entity() or anyhow.
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# Obtain `msg_ids' through `.get_message_history()` or anyhow. Must be a list.
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client(GetMessagesViewsRequest(
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peer=channel,
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id=msg_ids,
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increment=True
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))
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__ https://github.com/LonamiWebs/Telethon/issues/233
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__ https://github.com/LonamiWebs/Telethon/issues/305
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__ https://github.com/LonamiWebs/Telethon/issues/409
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__ https://github.com/LonamiWebs/Telethon/issues/447
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__ https://lonamiwebs.github.io/Telethon/methods/messages/get_messages_views.html
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