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import discord
from discord.ext import commands
import lavalink
from lavalink import errors
from global_variables import (
LAVALINK_HOST,
LAVALINK_PASSWORD,
LAVALINK_PORT,
LOG,
CheckPlayerError,
)
from ai_recommendations import add_song_recommendations
class LavalinkVoiceClient(discord.VoiceProtocol):
"""
This is the preferred way to handle external voice sending
This client will be created via a cls in the connect method of the channel
see the following documentation:
https://discordpy.readthedocs.io/en/latest/api.html#voiceprotocol
"""
def __init__(self, client: commands.Bot, channel: discord.abc.Connectable):
self.client = client
self.channel = channel
self.guild_id = channel.guild.id
self._destroyed = False
if not hasattr(self.client, "lavalink"):
self.client.lavalink = lavalink.Client(client.user.id)
self.client.lavalink.add_node(
host=LAVALINK_HOST,
port=LAVALINK_PORT,
password=LAVALINK_PASSWORD,
region="us",
name="default-node",
) # Host, Port, Password, Region
self.lavalink = self.client.lavalink
async def on_voice_server_update(self, data):
lavalink_data = {"t": "VOICE_SERVER_UPDATE", "d": data}
await self.lavalink.voice_update_handler(lavalink_data)
async def on_voice_state_update(self, data):
channel_id = data["channel_id"]
if not channel_id:
await self._destroy()
return
self.channel = self.client.get_channel(int(channel_id))
# the data needs to be transformed before being handed down to
# voice_update_handler
lavalink_data = {"t": "VOICE_STATE_UPDATE", "d": data}
await self.lavalink.voice_update_handler(lavalink_data)
async def connect(
self,
*,
timeout: float,
reconnect: bool,
self_deaf: bool = True,
self_mute: bool = False,
) -> None:
self.lavalink.player_manager.create(guild_id=self.channel.guild.id)
await self.channel.guild.change_voice_state(
channel=self.channel, self_mute=self_mute, self_deaf=self_deaf
)
async def disconnect(self, *, force: bool) -> None:
player = self.lavalink.player_manager.get(self.channel.guild.id)
if not force and not player.is_connected:
return
await self.channel.guild.change_voice_state(channel=None)
player.channel_id = None
await self._destroy()
async def _destroy(self):
self.cleanup()
if self._destroyed:
return
self._destroyed = True
try:
await self.lavalink.player_manager.destroy(self.guild_id)
except lavalink.ClientError:
pass
class Music(commands.Cog):
def __init__(self, bot):
self.bot = bot
async def cog_load(self):
if not hasattr(
self.bot, "lavalink"
): # This ensures the client isn't overwritten during cog reloads.
self.bot.lavalink = lavalink.Client(self.bot.user.id)
node = self.bot.lavalink.add_node(
host=LAVALINK_HOST,
port=LAVALINK_PORT,
password=LAVALINK_PASSWORD,
region='us-central',
connect=False
) # Host, Port, Password, Region, Connect
try:
await node.get_version()
except lavalink.errors.ClientError:
LOG.error("Authentication to lavalink node failed. Check your login credentials.")
else:
await node.connect()
LOG.info(f"Connected to lavalink node {node.name}")
self.lavalink: lavalink.Client = self.bot.lavalink
self.lavalink.add_event_hooks(self)
def cog_unload(self):
"""Cog unload handler. This removes any event hooks that were registered."""
self.lavalink._event_hooks.clear()
async def create_player(interaction: discord.Interaction):
"""Create a player for the guild associated with the interaction, or raise an error"""
try:
player = interaction.client.lavalink.player_manager.create(interaction.guild.id)
except errors.ClientError:
raise CheckPlayerError(
{
"title": "Lavalink Error",
"description": "An error occured when attempting to use lavalink node. Please submit a bug report if this issue persists.",
}
)
should_connect = interaction.command.name in ("play",)
voice_client = interaction.guild.voice_client
if not interaction.user.voice or not interaction.user.voice.channel:
if voice_client is not None:
raise CheckPlayerError(
{
"title": "Not in my VC",
"description": "You must join my voice channel to run that command.",
}
)
raise CheckPlayerError(
{
"title": "No Channel",
"description": "You must join a voice channel before you can run that command.",
}
)
if voice_client is None:
if not should_connect:
raise CheckPlayerError(
{
"title": "Not Connected",
"description": "I am not connected and playing music right now, therefore that command will not work.",
}
)
permissions = interaction.user.voice.channel.permissions_for(
interaction.guild.me
)
if not permissions.connect or not permissions.speak:
raise CheckPlayerError(
{
"title": "Missing Permissions",
"description": "I need the `CONNECT` and `SPEAK` permissions in order to work.",
}
)
player.store("channel", interaction.channel.id)
else:
if int(player.channel_id) != interaction.user.voice.channel.id:
raise CheckPlayerError(
{
"title": "Not in my VC",
"description": "You must join my voice channel to run that command.",
}
)
return True
@lavalink.listener(lavalink.events.NodeConnectedEvent)
async def on_node_connection(self, event: lavalink.events.NodeConnectedEvent):
LOG.info(f"Connected to lavalink node {event.node.name}")
@lavalink.listener(lavalink.events.QueueEndEvent)
async def on_queue_end(self, event: lavalink.events.QueueEndEvent):
guild_id = event.player.guild_id
guild = self.bot.get_guild(guild_id)
try:
self.bot.autoplay.remove(guild_id)
except ValueError:
pass
if guild is not None:
await guild.voice_client.disconnect(force=True)
@lavalink.listener(lavalink.events.TrackEndEvent)
async def on_track_end(self, event: lavalink.events.TrackEndEvent):
guild_id = event.player.guild_id
if len(event.player.queue) <= 10 and guild_id in self.bot.autoplay:
inputs = {}
for song in event.player.queue[:10]:
inputs[song.title] = song.author
await add_song_recommendations(self.bot.user, event.player, 5, inputs)
async def setup(bot):
await bot.add_cog(Music(bot))
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