Add support for guild intents

4 files changed, 331 insertions, 1 deletions

diff --git a/discord/client.py b/discord/client.py
index 407fd47f..91d83da4 100644
--- a/discord/client.py
+++ b/discord/client.py
@@ -140,6 +140,10 @@ class Client:
         Integer starting at ``0`` and less than :attr:`.shard_count`.
     shard_count: Optional[:class:`int`]
         The total number of shards.
+    intents: :class:`Intents`
+        A list of intents that you want to enable for the session. This is a way of
+        disabling and enabling certain gateway events from triggering and being sent.
+        Currently, if no intents are passed then you will receive all data.
     fetch_offline_members: :class:`bool`
         Indicates if :func:`.on_ready` should be delayed to fetch all offline
         members from the guilds the client belongs to. If this is ``False``\, then
diff --git a/discord/flags.py b/discord/flags.py
index 448bced2..4f5f197e 100644
--- a/discord/flags.py
+++ b/discord/flags.py
@@ -29,7 +29,8 @@ from .enums import UserFlags
 __all__ = (
     'SystemChannelFlags',
     'MessageFlags',
-    'PublicUserFlags'
+    'PublicUserFlags',
+    'Intents',
 )
 
 class flag_value:
@@ -327,3 +328,317 @@ class PublicUserFlags(BaseFlags):
     def all(self):
         """List[:class:`UserFlags`]: Returns all public flags the user has."""
         return [public_flag for public_flag in UserFlags if self._has_flag(public_flag.value)]
+
+
+@fill_with_flags()
+class Intents(BaseFlags):
+    r"""Wraps up a Discord gateway intent flag.
+
+    Similar to :class:`Permissions`\, the properties provided are two way.
+    You can set and retrieve individual bits using the properties as if they
+    were regular bools.
+
+    To construct an object you can pass keyword arguments denoting the flags
+    to enable or disable.
+
+    This is used to disable certain gateway features that are unnecessary to
+    run your bot. To make use of this, it is passed to the ``intents`` keyword
+    argument of :class:`Client`.
+
+    A default instance of this class has everything enabled except :attr:`presences`.
+
+    .. container:: operations
+
+        .. describe:: x == y
+
+            Checks if two flags are equal.
+        .. describe:: x != y
+
+            Checks if two flags are not equal.
+        .. describe:: hash(x)
+
+               Return the flag's hash.
+        .. describe:: iter(x)
+
+               Returns an iterator of ``(name, value)`` pairs. This allows it
+               to be, for example, constructed as a dict or a list of pairs.
+
+    Attributes
+    -----------
+    value: :class:`int`
+        The raw value. You should query flags via the properties
+        rather than using this raw value.
+    """
+
+    __slots__ = ()
+
+    def __init__(self, **kwargs):
+        # Change the default value to everything being enabled
+        # except presences
+        bits = max(self.VALID_FLAGS.values()).bit_length()
+        self.value = (1 << bits) - 1
+        self.presences = False
+        for key, value in kwargs.items():
+            if key not in self.VALID_FLAGS:
+                raise TypeError('%r is not a valid flag name.' % key)
+            setattr(self, key, value)
+
+    @classmethod
+    def all(cls):
+        """A factory method that creates a :class:`Intents` with everything enabled."""
+        bits = max(cls.VALID_FLAGS.values()).bit_length()
+        value = (1 << bits) - 1
+        self = cls.__new__(cls)
+        self.value = value
+        return self
+
+    @classmethod
+    def none(cls):
+        """A factory method that creates a :class:`Intents` with everything disabled."""
+        self = cls.__new__(cls)
+        self.value = self.DEFAULT_VALUE
+        return self
+
+    @flag_value
+    def guilds(self):
+        """:class:`bool`: Whether guild related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_guild_join`
+        - :func:`on_guild_remove`
+        - :func:`on_guild_available`
+        - :func:`on_guild_unavailable`
+        - :func:`on_guild_channel_update`
+        - :func:`on_guild_channel_create`
+        - :func:`on_guild_channel_delete`
+        - :func:`on_guild_channel_pins_update`
+        """
+        return 1 << 0
+
+    @flag_value
+    def members(self):
+        """:class:`bool`: Whether guild member related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_member_join`
+        - :func:`on_member_remove`
+        - :func:`on_member_update` (nickname, roles)
+        """
+        return 1 << 1
+
+    @flag_value
+    def bans(self):
+        """:class:`bool`: Whether guild ban related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_member_ban`
+        - :func:`on_member_unban`
+        """
+        return 1 << 2
+
+    @flag_value
+    def emojis(self):
+        """:class:`bool`: Whether guild emoji related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_guild_emojis_update`
+        """
+        return 1 << 3
+
+    @flag_value
+    def integrations(self):
+        """:class:`bool`: Whether guild integration related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_guild_integrations_update`
+        """
+        return 1 << 4
+
+    @flag_value
+    def webhooks(self):
+        """:class:`bool`: Whether guild webhook related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_webhooks_update`
+        """
+        return 1 << 5
+
+    @flag_value
+    def invites(self):
+        """:class:`bool`: Whether guild invite related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_invite_create`
+        - :func:`on_invite_delete`
+        """
+        return 1 << 6
+
+    @flag_value
+    def voice_states(self):
+        """:class:`bool`: Whether guild voice state related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_voice_state_update`
+        """
+        return 1 << 7
+
+    @flag_value
+    def presences(self):
+        """:class:`bool`: Whether guild voice state related events are enabled.
+
+        This corresponds to the following events:
+
+        - :func:`on_member_update` (activities, status)
+        - :func:`on_user_update`
+
+        .. note::
+
+            Currently, this requires opting in explicitly via the dev portal as well.
+            Bots in over 100 guilds will need to apply to Discord for approval.
+        """
+        return 1 << 8
+
+    @flag_value
+    def messages(self):
+        """:class:`bool`: Whether guild and direct message related events are enabled.
+
+        This is a shortcut to set or get both :attr:`guild_messages` and :attr:`dm_messages`.
+
+        This corresponds to the following events:
+
+        - :func:`on_message` (both guilds and DMs)
+        - :func:`on_message_update` (both guilds and DMs)
+        - :func:`on_message_delete` (both guilds and DMs)
+        - :func:`on_raw_message_delete` (both guilds and DMs)
+        - :func:`on_raw_message_update` (both guilds and DMs)
+        - :func:`on_private_channel_create`
+        """
+        return (1 << 9) | (1 << 12)
+
+    @flag_value
+    def guild_messages(self):
+        """:class:`bool`: Whether guild message related events are enabled.
+
+        See also :attr:`dm_messages` for DMs or :attr:`messages` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_message` (only for guilds)
+        - :func:`on_message_update` (only for guilds)
+        - :func:`on_message_delete` (only for guilds)
+        - :func:`on_raw_message_delete` (only for guilds)
+        - :func:`on_raw_message_update` (only for guilds)
+        """
+        return 1 << 9
+
+    @flag_value
+    def dm_messages(self):
+        """:class:`bool`: Whether direct message related events are enabled.
+
+        See also :attr:`guild_messages` for guilds or :attr:`messages` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_message` (only for DMs)
+        - :func:`on_message_update` (only for DMs)
+        - :func:`on_message_delete` (only for DMs)
+        - :func:`on_raw_message_delete` (only for DMs)
+        - :func:`on_raw_message_update` (only for DMs)
+        - :func:`on_private_channel_create`
+        """
+        return 1 << 12
+
+    @flag_value
+    def reactions(self):
+        """:class:`bool`: Whether guild and direct message reaction related events are enabled.
+
+        This is a shortcut to set or get both :attr:`guild_reactions` and :attr:`dm_reactions`.
+
+        This corresponds to the following events:
+
+        - :func:`on_reaction_add` (both guilds and DMs)
+        - :func:`on_reaction_remove` (both guilds and DMs)
+        - :func:`on_reaction_clear` (both guilds and DMs)
+        - :func:`on_raw_reaction_add` (both guilds and DMs)
+        - :func:`on_raw_reaction_remove` (both guilds and DMs)
+        - :func:`on_raw_reaction_clear` (both guilds and DMs)
+        """
+        return (1 << 10) | (1 << 13)
+
+    @flag_value
+    def guild_reactions(self):
+        """:class:`bool`: Whether guild message reaction related events are enabled.
+
+        See also :attr:`dm_reactions` for DMs or :attr:`reactions` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_reaction_add` (only for guilds)
+        - :func:`on_reaction_remove` (only for guilds)
+        - :func:`on_reaction_clear` (only for guilds)
+        - :func:`on_raw_reaction_add` (only for guilds)
+        - :func:`on_raw_reaction_remove` (only for guilds)
+        - :func:`on_raw_reaction_clear` (only for guilds)
+        """
+        return 1 << 10
+
+    @flag_value
+    def dm_reactions(self):
+        """:class:`bool`: Whether direct message reaction related events are enabled.
+
+        See also :attr:`guild_reactions` for guilds or :attr:`reactions` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_reaction_add` (only for DMs)
+        - :func:`on_reaction_remove` (only for DMs)
+        - :func:`on_reaction_clear` (only for DMs)
+        - :func:`on_raw_reaction_add` (only for DMs)
+        - :func:`on_raw_reaction_remove` (only for DMs)
+        - :func:`on_raw_reaction_clear` (only for DMs)
+        """
+        return 1 << 13
+
+    @flag_value
+    def typing(self):
+        """:class:`bool`: Whether guild and direct message typing related events are enabled.
+
+        This is a shortcut to set or get both :attr:`guild_typing` and :attr:`dm_typing`.
+
+        This corresponds to the following events:
+
+        - :func:`on_typing` (both guilds and DMs)
+        """
+        return (1 << 11) | (1 << 14)
+
+    @flag_value
+    def guild_typing(self):
+        """:class:`bool`: Whether guild and direct message typing related events are enabled.
+
+        See also :attr:`dm_typing` for DMs or :attr:`typing` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_typing` (only for guilds)
+        """
+        return 1 << 11
+
+    @flag_value
+    def dm_typing(self):
+        """:class:`bool`: Whether guild and direct message typing related events are enabled.
+
+        See also :attr:`guild_typing` for guilds or :attr:`typing` for both.
+
+        This corresponds to the following events:
+
+        - :func:`on_typing` (only for DMs)
+        """
+        return 1 << 14
diff --git a/discord/gateway.py b/discord/gateway.py
index 382d60f1..ab595566 100644
--- a/discord/gateway.py
+++ b/discord/gateway.py
@@ -343,6 +343,9 @@ class DiscordWebSocket:
                 'afk': False
             }
 
+        if state._intents is not None:
+            payload['d']['intents'] = state._intents
+
         await self.call_hooks('before_identify', self.shard_id, initial=self._initial_identify)
         await self.send_as_json(payload)
         log.info('Shard ID %s has sent the IDENTIFY payload.', self.shard_id)
diff --git a/discord/state.py b/discord/state.py
index fc297d03..6c0f1e89 100644
--- a/discord/state.py
+++ b/discord/state.py
@@ -51,6 +51,7 @@ from .member import Member
 from .role import Role
 from .enums import ChannelType, try_enum, Status, Enum
 from . import utils
+from .flags import Intents
 from .embeds import Embed
 from .object import Object
 from .invite import Invite
@@ -115,8 +116,15 @@ class ConnectionState:
             else:
                 status = str(status)
 
+        intents = options.get('intents', None)
+        if intents is not None:
+            if not isinstance(intents, Intents):
+                raise TypeError('intents parameter must be Intent not %r' % type(intents))
+            intents = intents.value
+
         self._activity = activity
         self._status = status
+        self._intents = intents
 
         self.parsers = parsers = {}
         for attr, func in inspect.getmembers(self):