voice_bot.py

import asyncio
from ctypes.util import find_library
import discord
from discord.ext import commands
from discord import opus
import random

class VoiceBot:
    def __init__(self, bot):
        self.bot = bot
        self.load_opus()

    async def on_ready(self):
        print('Logged in as')
        print(self.bot.user.name)
        print(self.bot.user.id)
        print('------')

    def load_opus(self):
        opus_path = find_library('opus')
        opus.load_opus(opus_path)
        if not opus.is_loaded():
        	print('Opus was not loaded')
        	self.bot.loop.stop()

    @commands.command(pass_context = True)
    async def rickroll(self, ctx, *, requested_channel: str):
        """ Joins and Rick-Rolls the specified channel name.
        Command use: '!rickroll <channel_name>' """
        if self.bot.is_voice_connected(ctx.message.server):
            await discord.utils.get(self.bot.voice_clients, server = ctx.message.server).disconnect()
        
        voice_channel = discord.utils.get(ctx.message.server.channels, name = requested_channel)
        if voice_channel == None:
            await self.bot.say('Channel "' + requested_channel + '" does not exist. (Channel names are case-sensitive)')
            return
        if voice_channel.type != discord.ChannelType.voice:
            await self.bot.say('Channel "' + requested_channel + '" is not a voice channel. (Channel names are case-sensitive)')
            return
        voice_client = await self.bot.join_voice_channel(voice_channel)
        yt_player = await voice_client.create_ytdl_player('https://www.youtube.com/watch?v=dQw4w9WgXcQ', after = lambda: self.bot.loop.create_task(voice_client.disconnect()))
        print('Player loaded.')
        yt_player.volume = 0.3
        yt_player.start()
                
    @commands.command(pass_context = True)
    async def disconnect(self, ctx):
        """ Disconnects the current voice client on the server. """
        await discord.utils.get(self.bot.voice_clients, server = ctx.message.server).disconnect()
        
    @commands.command(pass_context = True)
    async def youtube(self, ctx, link: str, *, requested_channel: str):
        """ Plays the audio of the youtube link in the specified channel.
        Command use: '!youtube <link> <channel_name>' """
        if self.bot.is_voice_connected(ctx.message.server):
            await discord.utils.get(self.bot.voice_clients, server = ctx.message.server).disconnect()
        
        voice_channel = discord.utils.get(ctx.message.server.channels, name = requested_channel)
        if voice_channel == None:
            await self.bot.say('Channel "' + requested_channel + '" does not exist. (Channel names are case-sensitive)')
            return
        if voice_channel.type != discord.ChannelType.voice:
            await self.bot.say('Channel "' + requested_channel + '" is not a voice channel. (Channel names are case-sensitive)')
            return
        voice_client = await self.bot.join_voice_channel(voice_channel)
        yt_player = await voice_client.create_ytdl_player(link, after = lambda: self.bot.loop.create_task(voice_client.disconnect()))
        print('Player loaded.')
        yt_player.volume = 0.15
        yt_player.start()

def setup(bot):
    bot.add_cog(VoiceBot(bot))