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462 lines
13 KiB
462 lines
13 KiB
import re
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import six
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from six.moves import map
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from holster.enum import Enum
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from disco.util.snowflake import to_snowflake
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from disco.util.functional import cached_property, one_or_many, chunks
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from disco.types.user import User
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from disco.types.base import SlottedModel, Field, AutoDictField, snowflake, enum, text
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from disco.types.permissions import Permissions, Permissible, PermissionValue
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from disco.voice.client import VoiceClient
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NSFW_RE = re.compile('^nsfw(-|$)')
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ChannelType = Enum(
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GUILD_TEXT=0,
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DM=1,
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GUILD_VOICE=2,
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GROUP_DM=3,
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)
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PermissionOverwriteType = Enum(
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ROLE='role',
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MEMBER='member'
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)
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class ChannelSubType(SlottedModel):
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channel_id = Field(None)
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@cached_property
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def channel(self):
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return self.client.state.channels.get(self.channel_id)
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class PermissionOverwrite(ChannelSubType):
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"""
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A PermissionOverwrite for a :class:`Channel`.
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Attributes
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----------
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id : snowflake
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The overwrite ID
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type : :const:`disco.types.channel.PermissionsOverwriteType`
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The overwrite type
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allowed : :class:`PermissionValue`
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All allowed permissions
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denied : :class:`PermissionValue`
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All denied permissions
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"""
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id = Field(snowflake)
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type = Field(enum(PermissionOverwriteType))
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allow = Field(PermissionValue, cast=int)
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deny = Field(PermissionValue, cast=int)
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channel_id = Field(snowflake)
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@classmethod
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def create_for_channel(cls, channel, entity, allow=0, deny=0):
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from disco.types.guild import Role
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ptype = PermissionOverwriteType.ROLE if isinstance(entity, Role) else PermissionOverwriteType.MEMBER
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return cls(
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client=channel.client,
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id=entity.id,
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type=ptype,
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allow=allow,
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deny=deny,
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channel_id=channel.id
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).save()
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@property
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def compiled(self):
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value = PermissionValue()
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value -= self.deny
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value += self.allow
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return value
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def save(self):
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self.client.api.channels_permissions_modify(self.channel_id,
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self.id,
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self.allow.value or 0,
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self.deny.value or 0,
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self.type.name)
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return self
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def delete(self):
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self.client.api.channels_permissions_delete(self.channel_id, self.id)
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class Channel(SlottedModel, Permissible):
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"""
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Represents a Discord Channel.
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Attributes
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----------
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id : snowflake
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The channel ID.
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guild_id : Optional[snowflake]
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The guild id this channel is part of.
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name : str
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The channel's name.
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topic : str
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The channel's topic.
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position : int
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The channel's position.
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bitrate : int
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The channel's bitrate.
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recipients: list(:class:`disco.types.user.User`)
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Members of this channel (if this is a DM channel).
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type : :const:`ChannelType`
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The type of this channel.
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overwrites : dict(snowflake, :class:`disco.types.channel.PermissionOverwrite`)
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Channel permissions overwrites.
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"""
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id = Field(snowflake)
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guild_id = Field(snowflake)
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name = Field(text)
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topic = Field(text)
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last_message_id = Field(snowflake)
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position = Field(int)
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bitrate = Field(int)
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recipients = AutoDictField(User, 'id')
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type = Field(enum(ChannelType))
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overwrites = AutoDictField(PermissionOverwrite, 'id', alias='permission_overwrites')
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def __init__(self, *args, **kwargs):
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super(Channel, self).__init__(*args, **kwargs)
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self.after_load()
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def after_load(self):
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# TODO: hackfix
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self.attach(six.itervalues(self.overwrites), {'channel_id': self.id, 'channel': self})
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def __str__(self):
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return u'#{}'.format(self.name)
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def __repr__(self):
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return u'<Channel {} ({})>'.format(self.id, self)
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def get_permissions(self, user):
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"""
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Get the permissions a user has in the channel.
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Returns
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-------
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:class:`disco.types.permissions.PermissionValue`
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Computed permission value for the user.
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"""
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if not self.guild_id:
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return Permissions.ADMINISTRATOR
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member = self.guild.get_member(user)
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base = self.guild.get_permissions(member)
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for ow in six.itervalues(self.overwrites):
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if ow.id != user.id and ow.id not in member.roles:
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continue
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base -= ow.deny
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base += ow.allow
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return base
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@property
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def mention(self):
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return '<#{}>'.format(self.id)
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@property
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def is_guild(self):
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"""
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Whether this channel belongs to a guild.
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"""
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return self.type in (ChannelType.GUILD_TEXT, ChannelType.GUILD_VOICE)
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@property
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def is_dm(self):
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"""
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Whether this channel is a DM (does not belong to a guild).
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"""
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return self.type in (ChannelType.DM, ChannelType.GROUP_DM)
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@property
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def is_nsfw(self):
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"""
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Whether this channel is an NSFW channel.
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"""
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return self.type == ChannelType.GUILD_TEXT and NSFW_RE.match(self.name)
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@property
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def is_voice(self):
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"""
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Whether this channel supports voice.
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"""
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return self.type in (ChannelType.GUILD_VOICE, ChannelType.GROUP_DM)
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@property
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def messages(self):
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"""
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A default `MessageIterator` for the channel, can be used to quickly and
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easily iterate over the channels entire message history. For more control,
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use `Channel.messages_iter`.
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"""
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return self.messages_iter()
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@cached_property
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def guild(self):
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"""
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Guild this channel belongs to (or None if not applicable).
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"""
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return self.client.state.guilds.get(self.guild_id)
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def messages_iter(self, **kwargs):
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"""
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Creates a new `MessageIterator` for the channel with the given keyword
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arguments.
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"""
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return MessageIterator(self.client, self, **kwargs)
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def get_message(self, message):
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"""
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Attempts to fetch and return a `Message` from the message object
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or id.
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Returns
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-------
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`Message`
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The fetched message
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"""
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return self.client.api.channels_messages_get(self.id, to_snowflake(message))
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def get_invites(self):
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"""
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Returns
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-------
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list(`Invite`)
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Returns a list of all invites for this channel.
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"""
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return self.client.api.channels_invites_list(self.id)
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def create_invite(self, *args, **kwargs):
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"""
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Attempts to create a new invite with the given arguments. For more
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information see `Invite.create_for_channel`.
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Returns
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-------
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`Invite`
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"""
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from disco.types.invite import Invite
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return Invite.create_for_channel(self, *args, **kwargs)
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def get_pins(self):
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"""
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Returns
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-------
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list(`Message`)
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Returns a list of all pinned messages for this channel.
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"""
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return self.client.api.channels_pins_list(self.id)
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def create_pin(self, message):
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"""
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Pins the given message to the channel.
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Params
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------
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message : `Message`|snowflake
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The message or message ID to pin.
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"""
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self.client.api.channels_pins_create(self.id, to_snowflake(message))
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def delete_pin(self, message):
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"""
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Unpins the given message from the channel.
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Params
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------
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message : `Message`|snowflake
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The message or message ID to pin.
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"""
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self.client.api.channels_pins_delete(self.id, to_snowflake(message))
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def get_webhooks(self):
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"""
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Returns
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-------
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list(`Webhook`)
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Returns a list of all webhooks for this channel.
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"""
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return self.client.api.channels_webhooks_list(self.id)
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def create_webhook(self, *args, **kwargs):
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"""
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Creates a webhook for this channel. See `APIClient.channels_webhooks_create`
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for more information.
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Returns
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-------
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`Webhook`
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The created webhook.
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"""
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return self.client.api.channels_webhooks_create(self.id, *args, **kwargs)
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def send_message(self, *args, **kwargs):
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"""
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Send a message to this channel. See `APIClient.channels_messages_create`
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for more information.
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Returns
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-------
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`disco.types.message.Message`
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The created message.
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"""
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return self.client.api.channels_messages_create(self.id, *args, **kwargs)
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def connect(self, *args, **kwargs):
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"""
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Connect to this channel over voice.
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"""
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assert self.is_voice, 'Channel must support voice to connect'
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vc = VoiceClient(self)
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vc.connect(*args, **kwargs)
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return vc
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def create_overwrite(self, *args, **kwargs):
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"""
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Creates a `PermissionOverwrite` for this channel. See
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`PermissionOverwrite.create_for_channel` for more information.
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"""
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return PermissionOverwrite.create_for_channel(self, *args, **kwargs)
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def delete_message(self, message):
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"""
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Deletes a single message from this channel.
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Args
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----
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message : snowflake|`Message`
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The message to delete.
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"""
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self.client.api.channels_messages_delete(self.id, to_snowflake(message))
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@one_or_many
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def delete_messages(self, messages):
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"""
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Deletes a set of messages using the correct API route based on the number
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of messages passed.
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Args
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----
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messages : list(snowflake|`Message`)
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List of messages (or message ids) to delete. All messages must originate
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from this channel.
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"""
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message_ids = list(map(to_snowflake, messages))
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if not message_ids:
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return
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if self.can(self.client.state.me, Permissions.MANAGE_MESSAGES) and len(messages) > 2:
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for chunk in chunks(message_ids, 100):
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self.client.api.channels_messages_delete_bulk(self.id, chunk)
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else:
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for msg in messages:
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self.delete_message(msg)
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def delete(self):
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assert (self.is_dm or self.guild.can(self.client.state.me, Permissions.MANAGE_GUILD)), 'Invalid Permissions'
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self.client.api.channels_delete(self.id)
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def close(self):
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"""
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Closes a DM channel. This is intended as a safer version of `delete`,
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enforcing that the channel is actually a DM.
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"""
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assert self.is_dm, 'Cannot close non-DM channel'
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self.delete()
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class MessageIterator(object):
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"""
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An iterator which supports scanning through the messages for a channel.
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Parameters
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----------
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client : :class:`disco.client.Client`
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The disco client instance to use when making requests.
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channel : `Channel`
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The channel to iterate within.
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direction : :attr:`MessageIterator.Direction`
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The direction in which this iterator will move.
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bulk : bool
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If true, this iterator will yield messages in list batches, otherwise each
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message will be yield individually.
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before : snowflake
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The message to begin scanning at.
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after : snowflake
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The message to begin scanning at.
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chunk_size : int
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The number of messages to request per API call.
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"""
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Direction = Enum('UP', 'DOWN')
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def __init__(self, client, channel, direction=Direction.UP, bulk=False, before=None, after=None, chunk_size=100):
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self.client = client
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self.channel = channel
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self.direction = direction
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self.bulk = bulk
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self.before = before
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self.after = after
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self.chunk_size = chunk_size
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self.last = None
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self._buffer = []
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if not any((before, after)) and self.direction == self.Direction.DOWN:
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raise Exception('Must specify either before or after for downward seeking')
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def fill(self):
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"""
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Fills the internal buffer up with :class:`disco.types.message.Message` objects from the API.
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"""
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self._buffer = self.client.api.channels_messages_list(
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self.channel.id,
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before=self.before,
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after=self.after,
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limit=self.chunk_size)
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if not len(self._buffer):
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return
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self.after = None
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self.before = None
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if self.direction == self.Direction.UP:
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self.before = self._buffer[-1].id
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else:
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self._buffer.reverse()
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self.after = self._buffer[-1].id
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def next(self):
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return self.__next__()
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def __iter__(self):
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return self
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def __next__(self):
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if not len(self._buffer):
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self.fill()
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if self.bulk:
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res = self._buffer
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self._buffer = []
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return res
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else:
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return self._buffer.pop()
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