Implement StageInstance

10 files changed, 502 insertions, 15 deletions

diff --git a/discord/__init__.py b/discord/__init__.py
index 3b057e36..dcf421ff 100644
--- a/discord/__init__.py
+++ b/discord/__init__.py
@@ -55,6 +55,7 @@ from .audit_logs import *
 from .raw_models import *
 from .team import *
 from .sticker import *
+from .stage_instance import *
 from .interactions import *
 from .components import *
 
diff --git a/discord/channel.py b/discord/channel.py
index c9eb9c34..ded4da41 100644
--- a/discord/channel.py
+++ b/discord/channel.py
@@ -30,11 +30,12 @@ from typing import Callable, Dict, List, Optional, TYPE_CHECKING, Union, overloa
 
 import discord.abc
 from .permissions import PermissionOverwrite, Permissions
-from .enums import ChannelType, try_enum, VoiceRegion, VideoQualityMode
+from .enums import ChannelType, StagePrivacyLevel, try_enum, VoiceRegion, VideoQualityMode
 from .mixins import Hashable
 from . import utils
 from .asset import Asset
 from .errors import ClientException, NoMoreItems, InvalidArgument
+from .stage_instance import StageInstance
 
 __all__ = (
     'TextChannel',
@@ -49,7 +50,7 @@ __all__ = (
 
 if TYPE_CHECKING:
     from .role import Role
-    from .member import Member
+    from .member import Member, VoiceState
     from .abc import Snowflake
     from .message import Message
     from .webhook import Webhook
@@ -611,7 +612,7 @@ class VocalGuildChannel(discord.abc.Connectable, discord.abc.GuildChannel, Hasha
         return ChannelType.voice.value
 
     @property
-    def members(self):
+    def members(self) -> List[Member]:
         """List[:class:`Member`]: Returns all members that are currently inside this voice channel."""
         ret = []
         for user_id, state in self.guild._voice_states.items():
@@ -622,7 +623,7 @@ class VocalGuildChannel(discord.abc.Connectable, discord.abc.GuildChannel, Hasha
         return ret
 
     @property
-    def voice_states(self):
+    def voice_states(self) -> Dict[int, VoiceState]:
         """Returns a mapping of member IDs who have voice states in this channel.
 
         .. versionadded:: 1.3
@@ -640,7 +641,7 @@ class VocalGuildChannel(discord.abc.Connectable, discord.abc.GuildChannel, Hasha
         return {key: value for key, value in self.guild._voice_states.items() if value.channel.id == self.id}
 
     @utils.copy_doc(discord.abc.GuildChannel.permissions_for)
-    def permissions_for(self, member):
+    def permissions_for(self, member: Union[Role, Member], /) -> Permissions:
         base = super().permissions_for(member)
 
         # voice channels cannot be edited by people who can't connect to them
@@ -875,20 +876,119 @@ class StageChannel(VocalGuildChannel):
         self.topic = data.get('topic')
 
     @property
-    def requesting_to_speak(self):
+    def requesting_to_speak(self) -> List[Member]:
         """List[:class:`Member`]: A list of members who are requesting to speak in the stage channel."""
         return [member for member in self.members if member.voice.requested_to_speak_at is not None]
 
     @property
+    def speakers(self) -> List[Member]:
+        """List[:class:`Member`]: A list of members who have been permitted to speak in the stage channel.
+
+        .. versionadded:: 2.0
+        """
+        return [member for member in self.members if not member.voice.suppress and member.voice.requested_to_speak_at is None]
+
+    @property
+    def listeners(self) -> List[Member]:
+        """List[:class:`Member`]: A list of members who are listening in the stage channel.
+
+        .. versionadded:: 2.0
+        """
+        return [member for member in self.members if member.voice.suppress]
+
+    @property
+    def moderators(self) -> List[Member]:
+        """List[:class:`Member`]: A list of members who are moderating the stage channel.
+
+        .. versionadded:: 2.0
+        """
+        required_permissions = Permissions.stage_moderator()
+        return [member for member in self.members if self.permissions_for(member) >= required_permissions]
+
+    @property
     def type(self):
         """:class:`ChannelType`: The channel's Discord type."""
         return ChannelType.stage_voice
 
     @utils.copy_doc(discord.abc.GuildChannel.clone)
     async def clone(self, *, name: str = None, reason: Optional[str] = None) -> StageChannel:
-        return await self._clone_impl({
-            'topic': self.topic,
-        }, name=name, reason=reason)
+        return await self._clone_impl({}, name=name, reason=reason)
+
+    @property
+    def instance(self) -> Optional[StageInstance]:
+        """Optional[:class:`StageInstance`]: The running stage instance of the stage channel.
+
+        .. versionadded:: 2.0
+        """
+        return utils.get(self.guild.stage_instances, channel_id=self.id)
+
+    async def create_instance(self, *, topic: str, privacy_level: StagePrivacyLevel = utils.MISSING) -> StageInstance:
+        """|coro|
+
+        Create a stage instance.
+
+        You must have the :attr:`~Permissions.manage_channels` permission to
+        use this.
+
+        .. versionadded:: 2.0
+
+        Parameters
+        -----------
+        topic: :class:`str`
+            The stage instance's topic.
+        privacy_level: :class:`StagePrivacyLevel`
+            The stage instance's privacy level. Defaults to :attr:`PrivacyLevel.guild_only`.
+
+        Raises
+        ------
+        InvalidArgument
+            If the ``privacy_level`` parameter is not the proper type.
+        Forbidden
+            You do not have permissions to create a stage instance.
+        HTTPException
+            Creating a stage instance failed.
+
+        Returns
+        --------
+        :class:`StageInstance`
+            The newly created stage instance.
+        """
+
+        payload = {
+            'channel_id': self.id,
+            'topic': topic
+        }
+
+        if privacy_level is not utils.MISSING:
+            if not isinstance(privacy_level, StagePrivacyLevel):
+                raise InvalidArgument('privacy_level field must be of type PrivacyLevel')
+
+            payload['privacy_level'] = privacy_level.value
+
+        data = await self._state.http.create_stage_instance(**payload)
+        return StageInstance(guild=self.guild, state=self._state, data=data)
+
+    async def fetch_instance(self) -> StageInstance:
+        """|coro|
+
+        Gets the running :class:`StageInstance`.
+
+        .. versionadded:: 2.0
+
+        Raises
+        -------
+        :exc:`.NotFound`
+            The stage instance or channel could not be found.
+        :exc:`.HTTPException`
+            Getting the stage instance failed.
+
+        Returns
+        --------
+        :class:`StageInstance`
+            The stage instance.
+        """
+        data = await self._state.http.get_stage_instance(self.id)
+        return StageInstance(guild=self.guild, state=self._state, data=data)
 
     @overload
     async def edit(
@@ -918,12 +1018,13 @@ class StageChannel(VocalGuildChannel):
         You must have the :attr:`~Permissions.manage_channels` permission to
         use this.
 
+        .. versionchanged:: 2.0
+            The ``topic`` parameter must now be set via :attr:`create_instance`.
+
         Parameters
         ----------
         name: :class:`str`
             The new channel's name.
-        topic: Optional[:class:`str`]
-            The new channel's topic.
         position: :class:`int`
             The new channel's position.
         sync_permissions: :class:`bool`
diff --git a/discord/client.py b/discord/client.py
index 60226012..48bae688 100644
--- a/discord/client.py
+++ b/discord/client.py
@@ -29,7 +29,7 @@ import logging
 import signal
 import sys
 import traceback
-from typing import Any, List, Optional, TYPE_CHECKING, Union
+from typing import Any, Generator, List, Optional, TYPE_CHECKING, TypeVar, Union
 
 import aiohttp
 
@@ -56,6 +56,7 @@ from .webhook import Webhook
 from .iterators import GuildIterator
 from .appinfo import AppInfo
 from .ui.view import View
+from .stage_instance import StageInstance
 
 __all__ = (
     'Client',
@@ -693,6 +694,28 @@ class Client:
         """
         return self._connection.get_channel(id)
 
+    def get_stage_instance(self, id) -> Optional[StageInstance]:
+        """Returns a stage instance with the given stage channel ID.
+
+        .. versionadded:: 2.0
+
+        Parameters
+        -----------
+        id: :class:`int`
+            The ID to search for.
+
+        Returns
+        --------
+        Optional[:class:`StageInstance`]
+            The returns stage instance of ``None`` if not found.
+        """
+        from .channel import StageChannel
+
+        channel = self._connection.get_channel(id)
+
+        if isinstance(channel, StageChannel):
+            return channel.instance
+
     def get_guild(self, id):
         """Returns a guild with the given ID.
 
@@ -1136,6 +1159,34 @@ class Client:
             data = await self.http.create_guild(name, region_value, icon)
         return Guild(data=data, state=self._connection)
 
+    async def fetch_stage_instance(self, channel_id: int) -> StageInstance:
+        """|coro|
+
+        Gets a :class:`StageInstance` for a stage channel id.
+
+        .. versionadded:: 2.0
+
+        Parameters
+        -----------
+        channel_id: :class:`int`
+            The stage channel ID.
+
+        Raises
+        -------
+        :exc:`.NotFound`
+            The stage instance or channel could not be found.
+        :exc:`.HTTPException`
+            Getting the stage instance failed.
+
+        Returns
+        --------
+        :class:`StageInstance`
+            The stage instance from the stage channel ID.
+        """
+        data = await self.http.get_stage_instance(channel_id)
+        guild = self.get_guild(int(data['guild_id']))
+        return StageInstance(guild=guild, state=self._connection, data=data)  # type: ignore
+
     # Invite management
 
     async def fetch_invite(self, url: Union[Invite, str], *, with_counts: bool = True, with_expiration: bool = True) -> Invite:
@@ -1261,7 +1312,7 @@ class Client:
     async def fetch_user(self, user_id):
         """|coro|
 
-        Retrieves a :class:`~discord.User` based on their ID. 
+        Retrieves a :class:`~discord.User` based on their ID.
         You do not have to share any guilds with the user to get this information,
         however many operations do require that you do.
 
diff --git a/discord/enums.py b/discord/enums.py
index f34d135c..897f9602 100644
--- a/discord/enums.py
+++ b/discord/enums.py
@@ -50,6 +50,7 @@ __all__ = (
     'VideoQualityMode',
     'ComponentType',
     'ButtonStyle',
+    'StagePrivacyLevel',
 )
 
 def _create_value_cls(name):
@@ -480,6 +481,11 @@ class ButtonStyle(Enum):
     def __int__(self):
         return self.value
 
+class StagePrivacyLevel(Enum):
+    public = 1
+    closed = 2
+    guild_only = 2
+
 T = TypeVar('T')
 
 def create_unknown_value(cls: Type[T], val: Any) -> T:
diff --git a/discord/guild.py b/discord/guild.py
index e7c74de9..be223559 100644
--- a/discord/guild.py
+++ b/discord/guild.py
@@ -46,6 +46,7 @@ from .widget import Widget
 from .asset import Asset
 from .flags import SystemChannelFlags
 from .integrations import Integration, _integration_factory
+from .stage_instance import StageInstance
 
 __all__ = (
     'Guild',
@@ -182,7 +183,7 @@ class Guild(Hashable):
                  'description', 'max_presences', 'max_members', 'max_video_channel_users',
                  'premium_tier', 'premium_subscription_count', '_system_channel_flags',
                  'preferred_locale', '_discovery_splash', '_rules_channel_id',
-                 '_public_updates_channel_id', 'nsfw')
+                 '_public_updates_channel_id', '_stage_instances', 'nsfw')
 
     _PREMIUM_GUILD_LIMITS = {
         None: _GuildLimit(emoji=50, bitrate=96e3, filesize=8388608),
@@ -319,6 +320,11 @@ class Guild(Hashable):
         self._public_updates_channel_id = utils._get_as_snowflake(guild, 'public_updates_channel_id')
         self.nsfw = guild.get('nsfw', False)
 
+        self._stage_instances = {}
+        for s in guild.get('stage_instances', []):
+            stage_instance = StageInstance(guild=self, data=s, state=state)
+            self._stage_instances[stage_instance.id] = stage_instance
+
         cache_joined = self._state.member_cache_flags.joined
         self_id = self._state.self_id
         for mdata in guild.get('members', []):
@@ -614,6 +620,32 @@ class Guild(Hashable):
         return None
 
     @property
+    def stage_instances(self) -> List[StageInstance]:
+        """List[:class:`StageInstance`]: Returns a :class:`list` of the guild's stage instances that
+        are currently running.
+
+        .. versionadded:: 2.0
+        """
+        return list(self._stage_instances.values())
+
+    def get_stage_instance(self, stage_instance_id: int) -> Optional[StageInstance]:
+        """Returns a stage instance with the given ID.
+
+        .. versionadded:: 2.0
+
+        Parameters
+        -----------
+        stage_instance_id: :class:`int`
+            The ID to search for.
+
+        Returns
+        --------
+        Optional[:class:`StageInstance`]
+            The stage instance or ``None`` if not found.
+        """
+        return self._stage_instances.get(stage_instance_id)
+
+    @property
     def owner(self):
         """Optional[:class:`Member`]: The member that owns the guild."""
         return self.get_member(self.owner_id)
@@ -1801,7 +1833,7 @@ class Guild(Hashable):
             The list of integrations that are attached to the guild.
         """
         data = await self._state.http.get_all_integrations(self.id)
-        
+
         def convert(d):
             factory, _ = _integration_factory(d['type'])
             if factory is None:
diff --git a/discord/http.py b/discord/http.py
index c14cc8d4..4dfea5da 100644
--- a/discord/http.py
+++ b/discord/http.py
@@ -44,7 +44,9 @@ if TYPE_CHECKING:
     from .types import (
         interactions,
         invite,
+        stage_instance,
     )
+    from .types.snowflake import Snowflake
 
     T = TypeVar('T')
     Response = Coroutine[Any, Any, T]
@@ -1080,6 +1082,33 @@ class HTTPClient:
     def move_member(self, user_id, guild_id, channel_id, *, reason=None):
         return self.edit_member(guild_id=guild_id, user_id=user_id, channel_id=channel_id, reason=reason)
 
+    # Stage instance management
+
+    def get_stage_instance(self, channel_id: Snowflake) -> Response[stage_instance.StageInstance]:
+        return self.request(Route('GET', '/stage-instances/{channel_id}', channel_id=channel_id))
+
+    def create_stage_instance(self, **payload) -> Response[stage_instance.StageInstance]:
+        valid_keys = (
+            'channel_id',
+            'topic',
+            'privacy_level',
+        )
+        payload = {k: v for k, v in payload.items() if k in valid_keys}
+
+        return self.request(Route('POST', '/stage-instances'), json=payload)
+
+    def edit_stage_instance(self, channel_id: Snowflake, **payload) -> Response[None]:
+        valid_keys = (
+            'topic',
+            'privacy_level',
+        )
+        payload = {k: v for k, v in payload.items() if k in valid_keys}
+
+        return self.request(Route('PATCH', '/stage-instances/{channel_id}', channel_id=channel_id), json=payload)
+
+    def delete_stage_instance(self, channel_id: Snowflake) -> Response[None]:
+        return self.request(Route('DELETE', '/stage-instances/{channel_id}', channel_id=channel_id))
+
     # Application commands (global)
 
     def get_global_commands(self, application_id) -> Response[List[interactions.ApplicationCommand]]:
diff --git a/discord/stage_instance.py b/discord/stage_instance.py
new file mode 100644
index 00000000..a6479d75
--- /dev/null
+++ b/discord/stage_instance.py
@@ -0,0 +1,168 @@
+"""
+The MIT License (MIT)
+
+Copyright (c) 2015-present Rapptz
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+"""
+
+from __future__ import annotations
+
+from typing import Optional, TYPE_CHECKING
+
+from .utils import MISSING, cached_slot_property
+from .mixins import Hashable
+from .errors import InvalidArgument
+from .enums import StagePrivacyLevel, try_enum
+
+__all__ = (
+    'StageInstance',
+)
+
+if TYPE_CHECKING:
+    from .types.channel import StageInstance as StageInstancePayload
+    from .state import ConnectionState
+    from .channel import StageChannel
+    from .guild import Guild
+
+
+class StageInstance(Hashable):
+    """Represents a stage instance of a stage channel in a guild.
+
+    .. versionadded:: 2.0
+
+    .. container:: operations
+
+        .. describe:: x == y
+
+            Checks if two stagea instances are equal.
+
+        .. describe:: x != y
+
+            Checks if two stage instances are not equal.
+
+        .. describe:: hash(x)
+
+            Returns the stage instance's hash.
+
+    Attributes
+    -----------
+    id: :class:`int`
+        The stage instance's ID.
+    guild: :class:`Guild`
+        The guild that the stage instance is running in.
+    channel_id: :class:`int`
+        The ID of the channel that the stage instance is running in.
+    topic: :class:`str`
+        The topic of the stage instance.
+    privacy_level: :class:`StagePrivacyLevel`
+        The privacy level of the stage instance.
+    discoverable_disabled: :class:`bool`
+        Whether the stage instance is discoverable.
+    """
+
+    __slots__ = (
+        '_state',
+        'id',
+        'guild',
+        'channel_id',
+        'topic',
+        'privacy_level',
+        'discoverable_disabled',
+        '_cs_channel',
+    )
+
+    def __init__(self, *, state: ConnectionState, guild: Guild, data: StageInstancePayload) -> None:
+        self._state = state
+        self.guild = guild
+        self._update(data)
+
+    def _update(self, data: StageInstancePayload):
+        self.id: int = int(data['id'])
+        self.channel_id: int = int(data['channel_id'])
+        self.topic: str = data['topic']
+        self.privacy_level = try_enum(StagePrivacyLevel, data['privacy_level'])
+        self.discoverable_disabled = data['discoverable_disabled']
+
+    def __repr__(self) -> str:
+        return f'<StageInstance id={self.id} guild={self.guild!r} channel_id={self.channel_id} topic={self.topic!r}>'
+
+    @cached_slot_property('_cs_channel')
+    def channel(self) -> Optional[StageChannel]:
+        """Optional[:class:`StageChannel`: The guild that stage instance is running in."""
+        return self._state.get_channel(self.channel_id)
+
+    def is_public(self) -> bool:
+        return self.privacy_level is StagePrivacyLevel.public
+
+    async def edit(self, *, topic: str = MISSING, privacy_level: StagePrivacyLevel = MISSING) -> None:
+        """|coro|
+
+        Edits the stage instance.
+
+        You must have the :attr:`~Permissions.manage_channels` permission to
+        use this.
+
+        Parameters
+        -----------
+        topic: :class:`str`
+            The stage instance's new topic.
+        privacy_level: :class:`StagePrivacyLevel`
+            The stage instance's new privacy level.
+
+        Raises
+        ------
+        InvalidArgument
+            If the ``privacy_level`` parameter is not the proper type.
+        Forbidden
+            You do not have permissions to edit the stage instance.
+        HTTPException
+            Editing a stage instance failed.
+        """
+
+        payload = {}
+
+        if topic is not MISSING:
+            payload['topic'] = topic
+
+        if privacy_level is not MISSING:
+            if not isinstance(privacy_level, StagePrivacyLevel):
+                raise InvalidArgument('privacy_level field must be of type PrivacyLevel')
+
+            payload['privacy_level'] = privacy_level.value
+
+        if payload:
+            await self._state.http.edit_stage_instance(self.channel_id, **payload)
+
+    async def delete(self) -> None:
+        """|coro|
+
+        Deletes the stage instance.
+
+        You must have the :attr:`~Permissions.manage_channels` permission to
+        use this.
+
+        Raises
+        ------
+        Forbidden
+            You do not have permissions to delete the stage instance.
+        HTTPException
+            Deleting the stage instance failed.
+        """
+        await self._state.http.delete_stage_instance(self.channel_id)
diff --git a/discord/state.py b/discord/state.py
index fec75887..177c195c 100644
--- a/discord/state.py
+++ b/discord/state.py
@@ -53,6 +53,7 @@ from .object import Object
 from .invite import Invite
 from .interactions import Interaction
 from .ui.view import ViewStore
+from .stage_instance import StageInstance
 
 class ChunkRequest:
     def __init__(self, guild_id, loop, resolver, *, cache=True):
@@ -956,6 +957,40 @@ class ConnectionState:
         else:
             log.debug('WEBHOOKS_UPDATE referencing an unknown channel ID: %s. Discarding.', data['channel_id'])
 
+    def parse_stage_instance_create(self, data):
+        guild = self._get_guild(int(data['guild_id']))
+        if guild is not None:
+            stage_instance = StageInstance(guild=guild, state=self, data=data)
+            guild._stage_instances[stage_instance.id] = stage_instance
+            self.dispatch('stage_instance_create', stage_instance)
+        else:
+            log.debug('STAGE_INSTANCE_CREATE referencing unknown guild ID: %s. Discarding.', data['guild_id'])
+
+    def parse_stage_instance_update(self, data):
+        guild = self._get_guild(int(data['guild_id']))
+        if guild is not None:
+            stage_instance = guild._stage_instances.get(int(data['id']))
+            if stage_instance is not None:
+                old_stage_instance = copy.copy(stage_instance)
+                stage_instance._update(data)
+                self.dispatch('stage_instance_update', old_stage_instance, stage_instance)
+            else:
+                log.debug('STAGE_INSTANCE_UPDATE referencing unknown stage instance ID: %s. Discarding.', data['id'])
+        else:
+            log.debug('STAGE_INSTANCE_UPDATE referencing unknown guild ID: %s. Discarding.', data['guild_id'])
+
+    def parse_stage_instance_delete(self, data):
+        guild = self._get_guild(int(data['guild_id']))
+        if guild is not None:
+            try:
+                stage_instance = guild._stage_instances.pop(int(data['id']))
+            except KeyError:
+                pass
+            else:
+                self.dispatch('stage_instance_delete', stage_instance)
+        else:
+            log.debug('STAGE_INSTANCE_DELETE referencing unknown guild ID: %s. Discarding.', data['guild_id'])
+
     def parse_voice_state_update(self, data):
         guild = self._get_guild(utils._get_as_snowflake(data, 'guild_id'))
         channel_id = utils._get_as_snowflake(data, 'channel_id')
diff --git a/discord/types/channel.py b/discord/types/channel.py
index d9c9f74d..ea3747ab 100644
--- a/discord/types/channel.py
+++ b/discord/types/channel.py
@@ -89,3 +89,15 @@ class DMChannel(PartialChannel):
 class GroupDMChannel(DMChannel):
     icon: Optional[str]
     owner_id: Snowflake
+
+
+PrivacyLevel = Literal[1, 2]
+
+
+class StageInstance(TypedDict):
+    id: Snowflake
+    guild_id: Snowflake
+    channel_id: Snowflake
+    topic: str
+    privacy_level: PrivacyLevel
+    discoverable_disabled: bool
diff --git a/docs/api.rst b/docs/api.rst
index 27604ae4..ff6b1375 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -835,6 +835,32 @@ to handle it, which defaults to print a traceback and ignoring the exception.
     :param after: The voice state after the changes.
     :type after: :class:`VoiceState`
 
+.. function:: on_stage_instance_create(stage_instance)
+              on_stage_instance_delete(stage_instance)
+
+    Called when a :class:`StageInstance` is created or deleted for a :class:`StageChannel`.
+
+    .. versionadded:: 2.0
+
+    :param stage_instance: The stage instance that was created or deleted.
+    :type stage_instance: :class:`StageInstance`
+
+.. function:: on_stage_instance_update(before, after)
+
+    Called when a :class:`StageInstance` is updated.
+
+    The following, but not limited to, examples illustrate when this event is called:
+
+    - The topic is changed.
+    - The privacy level is changed.
+
+    .. versionadded:: 2.0
+
+    :param before: The stage instance before the update.
+    :type before: :class:`StageInstance`
+    :param after: The stage instance after the update.
+    :type after: :class:`StageInstance`
+
 .. function:: on_member_ban(guild, user)
 
     Called when user gets banned from a :class:`Guild`.
@@ -2120,6 +2146,23 @@ of :class:`enum.Enum`.
 
         Represents full camera video quality.
 
+.. class:: PrivacyLevel
+
+    Represents a stage instance's privacy level.
+
+    .. versionadded:: 2.0
+
+    .. attribute:: public
+
+        The stage instance can be joined by external users.
+
+    .. attribute:: closed
+
+        The stage instance can only be joined by members of the guild.
+
+    .. attribute:: guild_only
+
+        Alias for :attr:`.closed`
 
 Async Iterator
 ----------------
@@ -3126,6 +3169,15 @@ StageChannel
     :members:
     :inherited-members:
 
+
+StageInstance
+~~~~~~~~~~~~~~
+
+.. attributetable:: StageInstance
+
+.. autoclass:: StageInstance()
+    :members:
+
 CategoryChannel
 ~~~~~~~~~~~~~~~~~