class State(object):
"""
The State class is used to track global state based on events emitted from
the `GatewayClient`. State tracking is a core component of the Disco client,
providing the mechanism for most of the higher-level utility functions.
Attributes
----------
EVENTS : list(str)
A list of all events the State object binds to
client : `disco.client.Client`
The Client instance this state is attached to
config : `StateConfig`
The configuration for this state instance
me : `User`
The currently logged in user
dms : dict(snowflake, `Channel`)
Mapping of all known DM Channels
guilds : dict(snowflake, `Guild`)
Mapping of all known/loaded Guilds
channels : dict(snowflake, `Channel`)
Weak mapping of all known/loaded Channels
users : dict(snowflake, `User`)
Weak mapping of all known/loaded Users
voice_clients : dict(str, 'VoiceClient')
Weak mapping of all known voice clients
voice_states : dict(str, `VoiceState`)
Weak mapping of all known/active Voice States
messages : Optional[dict(snowflake, deque)]
Mapping of channel ids to deques containing `StackMessage` objects
"""
EVENTS = [
'Ready',
'GuildCreate',
'GuildUpdate',
'GuildDelete',
'GuildMemberAdd',
'GuildMemberRemove',
'GuildMemberUpdate',
'GuildMembersChunk',
'GuildRoleCreate',
'GuildRoleUpdate',
'GuildRoleDelete',
'GuildEmojisUpdate',
'ChannelCreate',
'ChannelUpdate',
'ChannelDelete',
'VoiceServerUpdate',
'VoiceStateUpdate',
'MessageCreate',
'PresenceUpdate',
]
def __init__(self, client, config):
self.client = client
self.config = config
self.ready = Event()
self.guilds_waiting_sync = 0
self.me = None
self.dms = HashMap()
self.guilds = HashMap()
self.channels = HashMap(weakref.WeakValueDictionary())
self.users = HashMap(weakref.WeakValueDictionary())
self.voice_clients = HashMap(weakref.WeakValueDictionary())
self.voice_states = HashMap(weakref.WeakValueDictionary())
# If message tracking is enabled, listen to those events
if self.config.track_messages:
self.messages = DefaultHashMap(
lambda: deque(maxlen=self.config.track_messages_size))
self.EVENTS += ['MessageDelete', 'MessageDeleteBulk']
# The bound listener objects
self.listeners = []
self.bind()
def unbind(self):
"""
Unbinds all bound event listeners for this state object.
"""
map(lambda k: k.unbind(), self.listeners)
self.listeners = []
def bind(self):
"""
Binds all events for this state object, storing the listeners for later
unbinding.
"""
assert not len(
self.listeners), 'Binding while already bound is dangerous'
for event in self.EVENTS:
func = 'on_' + underscore(event)
self.listeners.append(
self.client.events.on(event,
getattr(self, func),
priority=Priority.BEFORE))
def fill_messages(self, channel):
for message in reversed(next(channel.messages_iter(bulk=True))):
self.messages[channel.id].append(
StackMessage(message.id, message.channel_id,
message.author.id))
def on_ready(self, event):
self.me = event.user
self.guilds_waiting_sync = len(event.guilds)
for dm in event.private_channels:
self.dms[dm.id] = dm
self.channels[dm.id] = dm
def on_message_create(self, event):
if self.config.track_messages:
self.messages[event.message.channel_id].append(
StackMessage(event.message.id, event.message.channel_id,
event.message.author.id))
if event.message.channel_id in self.channels:
self.channels[
event.message.channel_id].last_message_id = event.message.id
def on_message_delete(self, event):
if event.channel_id not in self.messages:
return
sm = next(
(i for i in self.messages[event.channel_id] if i.id == event.id),
None)
if not sm:
return
self.messages[event.channel_id].remove(sm)
def on_message_delete_bulk(self, event):
if event.channel_id not in self.messages:
return
# TODO: performance
for sm in list(self.messages[event.channel_id]):
if sm.id in event.ids:
self.messages[event.channel_id].remove(sm)
def on_guild_create(self, event):
if event.unavailable is False:
self.guilds_waiting_sync -= 1
if self.guilds_waiting_sync <= 0:
self.ready.set()
self.guilds[event.guild.id] = event.guild
self.channels.update(event.guild.channels)
for member in six.itervalues(event.guild.members):
if member.user.id not in self.users:
self.users[member.user.id] = member.user
for presence in event.presences:
if presence.user.id in self.users:
self.users[presence.user.id].presence = presence
for voice_state in six.itervalues(event.guild.voice_states):
self.voice_states[voice_state.session_id] = voice_state
if self.config.sync_guild_members:
event.guild.request_guild_members()
def on_guild_update(self, event):
self.guilds[event.guild.id].inplace_update(event.guild,
ignored=[
'channels',
'members',
'voice_states',
'presences',
])
def on_guild_delete(self, event):
if event.id in self.guilds:
# Just delete the guild, channel references will fail
del self.guilds[event.id]
if event.id in self.voice_clients:
self.voice_clients[event.id].disconnect()
def on_channel_create(self, event):
if event.channel.is_guild and event.channel.guild_id in self.guilds:
self.guilds[event.channel.guild_id].channels[
event.channel.id] = event.channel
self.channels[event.channel.id] = event.channel
elif event.channel.is_dm:
self.dms[event.channel.id] = event.channel
self.channels[event.channel.id] = event.channel
def on_channel_update(self, event):
if event.channel.id in self.channels:
self.channels[event.channel.id].inplace_update(event.channel)
if event.overwrites is not UNSET:
self.channels[event.channel.id].overwrites = event.overwrites
self.channels[event.channel.id].after_load()
def on_channel_delete(self, event):
if event.channel.is_guild and event.channel.guild and event.channel.id in event.channel.guild.channels:
del event.channel.guild.channels[event.channel.id]
elif event.channel.is_dm and event.channel.id in self.dms:
del self.dms[event.channel.id]
def on_voice_server_update(self, event):
if event.guild_id not in self.voice_clients:
return
voice_client = self.voice_clients.get(event.guild_id)
voice_client.set_endpoint(event.endpoint)
voice_client.set_token(event.token)
def on_voice_state_update(self, event):
# Existing connection, we are either moving channels or disconnecting
if event.state.session_id in self.voice_states:
# Moving channels
if event.state.channel_id:
self.voice_states[event.state.session_id].inplace_update(
event.state)
# Disconnection
else:
if event.state.guild_id in self.guilds:
if event.state.session_id in self.guilds[
event.state.guild_id].voice_states:
del self.guilds[event.state.guild_id].voice_states[
event.state.session_id]
del self.voice_states[event.state.session_id]
# New connection
elif event.state.channel_id:
if event.state.guild_id in self.guilds:
expired_voice_state = self.guilds[
event.state.guild_id].voice_states.select_one(
user_id=event.user_id)
if expired_voice_state:
del self.guilds[event.state.guild_id].voice_states[
expired_voice_state.session_id]
self.guilds[event.state.guild_id].voice_states[
event.state.session_id] = event.state
expired_voice_state = self.voice_states.select_one(
user_id=event.user_id)
if expired_voice_state:
del self.voice_states[expired_voice_state.session_id]
self.voice_states[event.state.session_id] = event.state
if event.state.user_id != self.me.id:
return
server_id = event.state.guild_id or event.state.channel_id
if server_id in self.voice_clients:
voice_client = self.voice_clients[server_id]
voice_client.channel_id = event.state.channel_id
if not event.state.channel_id:
voice_client.disconnect()
return
if voice_client.token:
voice_client.set_state(VoiceState.CONNECTED)
def on_guild_member_add(self, event):
if event.member.user.id not in self.users:
self.users[event.member.user.id] = event.member.user
else:
event.member.user = self.users[event.member.user.id]
if event.member.guild_id not in self.guilds:
return
self.guilds[event.member.guild_id].members[
event.member.id] = event.member
def on_guild_member_update(self, event):
if event.member.guild_id not in self.guilds:
return
if event.member.id not in self.guilds[event.member.guild_id].members:
return
self.guilds[event.member.guild_id].members[
event.member.id].inplace_update(event.member)
def on_guild_member_remove(self, event):
if event.guild_id not in self.guilds:
return
if event.user.id not in self.guilds[event.guild_id].members:
return
del self.guilds[event.guild_id].members[event.user.id]
def on_guild_members_chunk(self, event):
if event.guild_id not in self.guilds:
return
guild = self.guilds[event.guild_id]
for member in event.members:
member.guild_id = guild.id
guild.members[member.id] = member
if member.id not in self.users:
self.users[member.id] = member.user
else:
member.user = self.users[member.id]
def on_guild_role_create(self, event):
if event.guild_id not in self.guilds:
return
self.guilds[event.guild_id].roles[event.role.id] = event.role
def on_guild_role_update(self, event):
if event.guild_id not in self.guilds:
return
self.guilds[event.guild_id].roles[event.role.id].inplace_update(
event.role)
def on_guild_role_delete(self, event):
if event.guild_id not in self.guilds:
return
if event.role_id not in self.guilds[event.guild_id].roles:
return
del self.guilds[event.guild_id].roles[event.role_id]
def on_guild_emojis_update(self, event):
if event.guild_id not in self.guilds:
return
for emoji in event.emojis:
emoji.guild_id = event.guild_id
self.guilds[event.guild_id].emojis = HashMap(
{i.id: i
for i in event.emojis})
def on_presence_update(self, event):
# TODO: this is recursive, we hackfix in model, but its still lame ATM
user = event.presence.user
user.presence = event.presence
# if we have the user tracked locally, we can just use the presence
# update to update both their presence and the cached user object.
if user.id in self.users:
self.users[user.id].inplace_update(user)
else:
# Otherwise this user does not exist in our local cache, so we can
# use this opportunity to add them. They will quickly fall out of
# scope and be deleted if they aren't used below
self.users[user.id] = user
# Some updates come with a guild_id and roles the user is in, we should
# use this to update the guild member, but only if we have the guild
# cached.
if event.roles is UNSET or event.guild_id not in self.guilds:
return
if user.id not in self.guilds[event.guild_id].members:
return
self.guilds[event.guild_id].members[user.id].roles = event.roles
class State(object):
"""
The State class is used to track global state based on events emitted from
the :class:`GatewayClient`. State tracking is a core component of the Disco
client, providing the mechanism for most of the higher-level utility functions.
Attributes
----------
EVENTS : list(str)
A list of all events the State object binds to
client : :class:`disco.client.Client`
The Client instance this state is attached to
config : :class:`StateConfig`
The configuration for this state instance
me : :class:`disco.types.user.User`
The currently logged in user
dms : dict(snowflake, :class:`disco.types.channel.Channel`)
Mapping of all known DM Channels
guilds : dict(snowflake, :class:`disco.types.guild.Guild`)
Mapping of all known/loaded Guilds
channels : dict(snowflake, :class:`disco.types.channel.Channel`)
Weak mapping of all known/loaded Channels
users : dict(snowflake, :class:`disco.types.user.User`)
Weak mapping of all known/loaded Users
voice_states : dict(str, :class:`disco.types.voice.VoiceState`)
Weak mapping of all known/active Voice States
messages : Optional[dict(snowflake, :class:`deque`)]
Mapping of channel ids to deques containing :class:`StackMessage` objects
"""
EVENTS = [
'Ready', 'GuildCreate', 'GuildUpdate', 'GuildDelete', 'GuildMemberAdd',
'GuildMemberRemove', 'GuildMemberUpdate', 'GuildMembersChunk',
'GuildRoleCreate', 'GuildRoleUpdate', 'GuildRoleDelete',
'GuildEmojisUpdate', 'ChannelCreate', 'ChannelUpdate', 'ChannelDelete',
'VoiceStateUpdate', 'MessageCreate', 'PresenceUpdate'
]
def __init__(self, client, config):
self.client = client
self.config = config
self.ready = Event()
self.guilds_waiting_sync = 0
self.me = None
self.dms = HashMap()
self.guilds = HashMap()
self.channels = HashMap(weakref.WeakValueDictionary())
self.users = HashMap(weakref.WeakValueDictionary())
self.voice_states = HashMap(weakref.WeakValueDictionary())
# If message tracking is enabled, listen to those events
if self.config.track_messages:
self.messages = DefaultHashMap(
lambda: deque(maxlen=self.config.track_messages_size))
self.EVENTS += ['MessageDelete', 'MessageDeleteBulk']
# The bound listener objects
self.listeners = []
self.bind()
def unbind(self):
"""
Unbinds all bound event listeners for this state object.
"""
map(lambda k: k.unbind(), self.listeners)
self.listeners = []
def bind(self):
"""
Binds all events for this state object, storing the listeners for later
unbinding.
"""
assert not len(
self.listeners), 'Binding while already bound is dangerous'
for event in self.EVENTS:
func = 'on_' + inflection.underscore(event)
self.listeners.append(
self.client.events.on(event, getattr(self, func)))
def fill_messages(self, channel):
for message in reversed(next(channel.messages_iter(bulk=True))):
self.messages[channel.id].append(
StackMessage(message.id, message.channel_id,
message.author.id))
def on_ready(self, event):
self.me = event.user
self.guilds_waiting_sync = len(event.guilds)
for dm in event.private_channels:
self.dms[dm.id] = dm
self.channels[dm.id] = dm
def on_message_create(self, event):
if self.config.track_messages:
self.messages[event.message.channel_id].append(
StackMessage(event.message.id, event.message.channel_id,
event.message.author.id))
if event.message.channel_id in self.channels:
self.channels[
event.message.channel_id].last_message_id = event.message.id
def on_message_delete(self, event):
if event.channel_id not in self.messages:
return
sm = next(
(i for i in self.messages[event.channel_id] if i.id == event.id),
None)
if not sm:
return
self.messages[event.channel_id].remove(sm)
def on_message_delete_bulk(self, event):
if event.channel_id not in self.messages:
return
# TODO: performance
for sm in list(self.messages[event.channel_id]):
if sm.id in event.ids:
self.messages[event.channel_id].remove(sm)
def on_guild_create(self, event):
if event.unavailable is False:
self.guilds_waiting_sync -= 1
if self.guilds_waiting_sync <= 0:
self.ready.set()
self.guilds[event.guild.id] = event.guild
self.channels.update(event.guild.channels)
for member in six.itervalues(event.guild.members):
self.users[member.user.id] = member.user
for voice_state in six.itervalues(event.guild.voice_states):
self.voice_states[voice_state.session_id] = voice_state
if self.config.sync_guild_members:
event.guild.sync()
def on_guild_update(self, event):
self.guilds[event.guild.id].update(event.guild)
def on_guild_delete(self, event):
if event.id in self.guilds:
# Just delete the guild, channel references will fall
del self.guilds[event.id]
def on_channel_create(self, event):
if event.channel.is_guild and event.channel.guild_id in self.guilds:
self.guilds[event.channel.guild_id].channels[
event.channel.id] = event.channel
self.channels[event.channel.id] = event.channel
elif event.channel.is_dm:
self.dms[event.channel.id] = event.channel
self.channels[event.channel.id] = event.channel
def on_channel_update(self, event):
if event.channel.id in self.channels:
self.channels[event.channel.id].update(event.channel)
def on_channel_delete(self, event):
if event.channel.is_guild and event.channel.guild and event.channel.id in event.channel.guild.channels:
del event.channel.guild.channels[event.channel.id]
elif event.channel.is_dm and event.channel.id in self.dms:
del self.dms[event.channel.id]
def on_voice_state_update(self, event):
# Happy path: we have the voice state and want to update/delete it
guild = self.guilds.get(event.state.guild_id)
if not guild:
return
if event.state.session_id in guild.voice_states:
if event.state.channel_id:
guild.voice_states[event.state.session_id].update(event.state)
else:
del guild.voice_states[event.state.session_id]
# Prevent a weird race where events come in before the guild_create (I think...)
if event.state.session_id in self.voice_states:
del self.voice_states[event.state.session_id]
elif event.state.channel_id:
guild.voice_states[event.state.session_id] = event.state
self.voice_states[event.state.session_id] = event.state
def on_guild_member_add(self, event):
if event.member.user.id not in self.users:
self.users[event.member.user.id] = event.member.user
else:
event.member.user = self.users[event.member.user.id]
if event.member.guild_id not in self.guilds:
return
self.guilds[event.member.guild_id].members[
event.member.id] = event.member
def on_guild_member_update(self, event):
if event.member.guild_id not in self.guilds:
return
if event.member.id not in self.guilds[event.member.guild_id].members:
return
self.guilds[event.member.guild_id].members[event.member.id].update(
event.member)
def on_guild_member_remove(self, event):
if event.guild_id not in self.guilds:
return
if event.user.id not in self.guilds[event.guild_id].members:
return
del self.guilds[event.guild_id].members[event.user.id]
def on_guild_members_chunk(self, event):
if event.guild_id not in self.guilds:
return
guild = self.guilds[event.guild_id]
for member in event.members:
member.guild_id = guild.id
guild.members[member.id] = member
self.users[member.id] = member.user
def on_guild_role_create(self, event):
if event.guild_id not in self.guilds:
return
self.guilds[event.guild_id].roles[event.role.id] = event.role
def on_guild_role_update(self, event):
if event.guild_id not in self.guilds:
return
self.guilds[event.guild_id].roles[event.role.id].update(event.role)
def on_guild_role_delete(self, event):
if event.guild_id not in self.guilds:
return
if event.role_id not in self.guilds[event.guild_id].roles:
return
del self.guilds[event.guild_id].roles[event.role_id]
def on_guild_emojis_update(self, event):
if event.guild_id not in self.guilds:
return
self.guilds[event.guild_id].emojis = HashMap(
{i.id: i
for i in event.emojis})
def on_presence_update(self, event):
if event.user.id in self.users:
self.users[event.user.id].update(event.presence.user)
self.users[event.user.id].presence = event.presence
event.presence.user = self.users[event.user.id]
if event.guild_id not in self.guilds:
return
if event.user.id not in self.guilds[event.guild_id].members:
return
self.guilds[event.guild_id].members[event.user.id].user.update(
event.user)
