Fix getting and using participants

client/src/telethon/_impl/client/client/bots.py

@@ -10,10 +10,6 @@ if TYPE_CHECKING:
 
 
 class InlineResults(metaclass=NoPublicConstructor):
-    """
-    :final:
-    """
-
     def __init__(
         self,
         client: Client,

client/src/telethon/_impl/client/client/chats.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Optional, Set
 
 from ...tl import abcs, functions, types
 from ..types import AsyncList, ChatLike, File, Participant, RecentAction, build_chat_map
@@ -21,6 +21,7 @@ class ParticipantList(AsyncList[Participant]):
         self._chat = chat
         self._peer: Optional[abcs.InputPeer] = None
         self._offset = 0
+        self._seen: Set[int] = set()
 
     async def _fetch_next(self) -> None:
         if self._peer is None:
@@ -45,10 +46,17 @@ class ParticipantList(AsyncList[Participant]):
 
             chat_map = build_chat_map(result.users, result.chats)
 
-            self._buffer.extend(
+            seen_count = len(self._seen)
-                Participant._from_raw_channel(p, chat_map) for p in result.participants
+            for p in result.participants:
-            )
+                part = Participant._from_raw_channel(p, chat_map)
+                pid = part._peer_id()
+                if pid not in self._seen:
+                    self._seen.add(pid)
+                    self._buffer.append(part)
+
             self._total = result.count
+            self._offset += len(result.participants)
+            self._done = len(self._seen) == seen_count
 
         elif isinstance(self._peer, types.InputPeerChat):
             result = await self._client(

client/src/telethon/_impl/client/types/__init__.py

@@ -1,3 +1,4 @@
+from .admin_right import AdminRight
 from .async_list import AsyncList
 from .callback_answer import CallbackAnswer
 from .chat import (
@@ -22,6 +23,7 @@ from .password_token import PasswordToken
 from .recent_action import RecentAction
 
 __all__ = [
+    "AdminRight",
     "AsyncList",
     "CallbackAnswer",
     "Channel",

client/src/telethon/_impl/client/types/admin_right.py

@@ -0,0 +1,104 @@
+from __future__ import annotations
+
+from enum import Enum
+from typing import Set
+
+from ...tl import abcs, types
+
+
+class AdminRight(Enum):
+    """
+    A right that can be granted to a chat's administrator.
+
+    .. note::
+
+        The specific values of the enumeration are not covered by `semver <https://semver.org/>`_.
+        They also may do nothing in future updates if Telegram decides to change them.
+    """
+
+    CHANGE_INFO = "change_info"
+    """Allows editing the description in a group or channel."""
+
+    POST_MESSAGES = "post_messages"
+    """Allows sending messages in a broadcast channel."""
+
+    EDIT_MESSAGES = "edit_messages"
+    """Allows editing messages in a group or channel."""
+
+    DELETE_MESSAGES = "delete_messages"
+    """Allows deleting messages in a group or channel."""
+
+    BAN_USERS = "ban_users"
+    """Allows setting the banned rights of other users in a group or channel."""
+
+    INVITE_USERS = "invite_users"
+    """Allows inviting other users to the group or channel."""
+
+    PIN_MESSAGES = "pin_messages"
+    """Allows pinning a message to the group or channel."""
+
+    MANAGE_ADMINS = "add_admins"
+    """Allows setting the same or less administrator rights to other users in the group or channel."""
+
+    REMAIN_ANONYMOUS = "anonymous"
+    """Allows the administrator to remain anonymous."""
+
+    MANAGE_CALLS = "manage_call"
+    """Allows managing group or channel calls."""
+
+    OTHER = "other"
+    """Unspecified."""
+
+    MANAGE_TOPICS = "manage_topics"
+    """Allows managing the topics in a group."""
+
+    POST_STORIES = "post_stories"
+    """Allows posting stories in a channel."""
+
+    EDIT_STORIES = "edit_stories"
+    """Allows editing stories in a channel."""
+
+    DELETE_STORIES = "delete_stories"
+    """Allows deleting stories in a channel."""
+
+    @classmethod
+    def _from_raw(cls, rights: abcs.ChatAdminRights) -> Set[AdminRight]:
+        assert isinstance(rights, types.ChatAdminRights)
+        all_rights = (
+            cls.CHANGE_INFO if rights.change_info else None,
+            cls.POST_MESSAGES if rights.post_messages else None,
+            cls.EDIT_MESSAGES if rights.edit_messages else None,
+            cls.DELETE_MESSAGES if rights.delete_messages else None,
+            cls.BAN_USERS if rights.ban_users else None,
+            cls.INVITE_USERS if rights.invite_users else None,
+            cls.PIN_MESSAGES if rights.pin_messages else None,
+            cls.MANAGE_ADMINS if rights.add_admins else None,
+            cls.REMAIN_ANONYMOUS if rights.anonymous else None,
+            cls.MANAGE_CALLS if rights.manage_call else None,
+            cls.OTHER if rights.other else None,
+            cls.MANAGE_TOPICS if rights.manage_topics else None,
+            cls.POST_STORIES if rights.post_stories else None,
+            cls.EDIT_STORIES if rights.edit_stories else None,
+            cls.DELETE_STORIES if rights.delete_stories else None,
+        )
+        return set(filter(None, iter(all_rights)))
+
+    @classmethod
+    def _chat_rights(cls) -> Set[AdminRight]:
+        return {
+            cls.CHANGE_INFO,
+            cls.POST_MESSAGES,
+            cls.EDIT_MESSAGES,
+            cls.DELETE_MESSAGES,
+            cls.BAN_USERS,
+            cls.INVITE_USERS,
+            cls.PIN_MESSAGES,
+            cls.MANAGE_ADMINS,
+            cls.REMAIN_ANONYMOUS,
+            cls.MANAGE_CALLS,
+            cls.OTHER,
+            cls.MANAGE_TOPICS,
+            cls.POST_STORIES,
+            cls.EDIT_STORIES,
+            cls.DELETE_STORIES,
+        }

client/src/telethon/_impl/client/types/participant.py

@@ -1,7 +1,8 @@
-from typing import Dict, Self, Union
+from typing import Dict, Optional, Self, Set, Union
 
 from ...tl import abcs, types
-from .chat import Chat
+from .admin_right import AdminRight
+from .chat import Chat, User, peer_id
 from .meta import NoPublicConstructor
 
 
@@ -66,3 +67,98 @@ class Participant(metaclass=NoPublicConstructor):
             return cls._create(participant, chat_map)
         else:
             raise RuntimeError("unexpected case")
+
+    def _peer_id(self) -> int:
+        if isinstance(
+            self._raw,
+            (
+                types.ChannelParticipant,
+                types.ChannelParticipantSelf,
+                types.ChannelParticipantCreator,
+                types.ChannelParticipantAdmin,
+                types.ChatParticipant,
+                types.ChatParticipantCreator,
+                types.ChatParticipantAdmin,
+            ),
+        ):
+            return self._raw.user_id
+        elif isinstance(
+            self._raw, (types.ChannelParticipantBanned, types.ChannelParticipantLeft)
+        ):
+            return peer_id(self._raw.peer)
+        else:
+            raise RuntimeError("unexpected case")
+
+    @property
+    def user(self) -> Optional[User]:
+        """
+        The user participant that is currently present in the chat.
+
+        This will be :data:`None` if the participant was instead :attr:`banned` or has :attr:`left`.
+        """
+        if isinstance(
+            self._raw,
+            (
+                types.ChannelParticipant,
+                types.ChannelParticipantSelf,
+                types.ChannelParticipantCreator,
+                types.ChannelParticipantAdmin,
+                types.ChatParticipant,
+                types.ChatParticipantCreator,
+                types.ChatParticipantAdmin,
+            ),
+        ):
+            user = self._chat_map[self._raw.user_id]
+            assert isinstance(user, User)
+            return user
+        else:
+            return None
+
+    @property
+    def banned(self) -> Optional[Chat]:
+        """
+        The banned participant.
+
+        This will usually be a :class:`User`.
+        """
+        if isinstance(self._raw, types.ChannelParticipantBanned):
+            return self._chat_map[peer_id(self._raw.peer)]
+        else:
+            return None
+
+    @property
+    def left(self) -> Optional[Chat]:
+        """
+        The participant that has left the group.
+
+        This will usually be a :class:`User`.
+        """
+        if isinstance(self._raw, types.ChannelParticipantLeft):
+            return self._chat_map[peer_id(self._raw.peer)]
+        else:
+            return None
+
+    @property
+    def creator(self) -> bool:
+        """
+        :data:`True` if the participant is the creator of the chat.
+        """
+        return isinstance(
+            self._raw, (types.ChannelParticipantCreator, types.ChatParticipantCreator)
+        )
+
+    @property
+    def admin_rights(self) -> Optional[Set[AdminRight]]:
+        """
+        The set of administrator rights this participant has been granted, if they are an administrator.
+        """
+        if isinstance(
+            self._raw, (types.ChannelParticipantCreator, types.ChannelParticipantAdmin)
+        ):
+            return AdminRight._from_raw(self._raw.admin_rights)
+        elif isinstance(
+            self._raw, (types.ChatParticipantCreator, types.ChatParticipantAdmin)
+        ):
+            return AdminRight._chat_rights()
+        else:
+            return None

client/src/telethon/types/__init__.py

@@ -2,6 +2,7 @@
 Classes for the various objects the library returns.
 """
 from .._impl.client.types import (
+    AdminRight,
     AsyncList,
     CallbackAnswer,
     Channel,
@@ -22,6 +23,7 @@ from .._impl.client.types.buttons import Button, InlineButton
 from .._impl.session import PackedChat, PackedType
 
 __all__ = [
+    "AdminRight",
     "AsyncList",
     "CallbackAnswer",
     "Channel",

client/tests/types_test.py

@@ -0,0 +1,14 @@
+from pytest import mark
+from telethon._impl.client.types import AdminRight
+from telethon._impl.tl import types
+
+
+@mark.parametrize("slot", types.ChatAdminRights.__slots__)
+def test_admin_right_covers_all(slot: str) -> None:
+    kwargs = {slot: False for slot in types.ChatAdminRights.__slots__}
+    kwargs[slot] = True
+
+    rights = types.ChatAdminRights(**kwargs)
+    rights_set = AdminRight._from_raw(rights)
+    assert len(rights_set) == 1
+    assert next(iter(rights_set)).value == slot