音乐队列，discord.py 音乐机器人

Question

我正在尝试向我的音乐齿轮添加队列系统。如果可能，它应该能够添加歌曲并在结束之前播放下一首歌曲。解释它应该如何工作就足够了，根本不需要提供任何代码。如果需要任何其他信息，请随时询问。

我的代码（精简一点）：

# IMPORT


import discord
from discord.ext import commands
import json
import asyncio
import youtube_dl



# LOKALE_VARIABLEN


ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': False,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0'
}

ffmpeg_options = {
    'options': '-vn'
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)

songs = asyncio.Queue()
play_next_song = asyncio.Event()


# ----

class YTDLSource(discord.PCMVolumeTransformer):
    def __init__(self, source, *, data, volume=0.5):
        super().__init__(source, volume)

        self.data = data

        self.title = data.get('title')
        self.url = data.get('url')
        self.thumbnail = data.get('thumbnail')


    @classmethod
    async def from_url(cls, url, *, loop=None, stream=False):
        loop = loop or asyncio.get_event_loop()
        data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))

        if 'entries' in data:
            data = data['entries'][0]

        filename = data['url'] if stream else ytdl.prepare_filename(data)
        return cls(discord.FFmpegPCMAudio(filename, **ffmpeg_options), data=data)


# COG_SETUP(START)


class Music(commands.Cog):

    def __init__(self, client):
        self.client = client


    @commands.command()
    async def join(self, ctx, *, channel: discord.VoiceChannel):

        if ctx.voice_client is not None:
            return await ctx.voice_client.move_to(channel)

        await channel.connect()

    @commands.command()
    @commands.cooldown(1, 10, commands.BucketType.user)
    async def play(self, ctx, *, url):

        try:

            async with ctx.typing():
                player = await YTDLSource.from_url(url, loop=self.client.loop, stream=True)
            ctx.voice_client.play(player, after=lambda e: print('Player error: %s' % e) if e else None)

        except:
            embed = discord.Embed(
                title='Fehler!',
                colour=discord.Colour.red(),
                description='Dies ist eine nicht Unterstützte URL!'
            )

            return await ctx.send(embed=embed)

        embed = discord.Embed(
            title='',
            colour=discord.Colour.blue(),
            description=f'[{format(player.title)}]({player.url})'
        )
        embed.set_author(name='Spielt gerade:')
        embed.set_image(url=player.thumbnail)
        embed.set_footer(text=f'Hinzugefügt von: {ctx.author.name}', icon_url=ctx.author.avatar_url)


        await ctx.send(embed=embed)




    @commands.command()
    async def volume(self, ctx, volume: int):

        if ctx.voice_client is None:

            embed = discord.Embed(
                title='Fehler!',
                colour=discord.Colour.red(),
                description='Ich bin mit keinem Sprachkanal verbunden!'
            )

            return await ctx.send(embed=embed)

        elif ctx.voice_client is not None:

            if volume in range(0, 201):
                try:
                    ctx.voice_client.source.volume = volume / 100

                    embed = discord.Embed(
                        title='Lautstärke',
                        colour=discord.Colour.blue(),
                        description=f'Lautstärke auf **{format(volume)}**% gestellt.'
                    )
                    embed.set_footer(text=f"Angepasst von: {ctx.author.name}", icon_url=ctx.author.avatar_url)

                    return await ctx.send(embed=embed)
                except:
                    pass

            else:

                embed = discord.Embed(
                    title='Fehler!',
                    colour=discord.Colour.red(),
                    description='Das ist Lauter, als die Musik geht!'
                )

                return await ctx.send(embed=embed)

    @commands.command()
    async def stop(self, ctx):
        try:

            await ctx.voice_client.disconnect()
            await ctx.message.delete()

        except:
            pass

    @commands.command()
    async def pause(self, ctx):

        if ctx.voice_client.is_playing():

            ctx.voice_client.pause()
            await ctx.message.delete()
            return

        else:

            embed = discord.Embed(
                title='Fehler!',
                colour=discord.Colour.red(),
                description='Es spielt keine Musik!'
            )

            return await ctx.send(embed=embed)

    @commands.command()
    async def resume(self, ctx):

        if ctx.voice_client.is_paused():

            ctx.voice_client.resume()
            await ctx.message.delete()
            return

        else:

            embed = discord.Embed(
                title='Fehler!',
                colour=discord.Colour.red(),
                description='Es wurde keine Musik pausiert, darum kann ich auch nichts fortsetzen!'
            )

            return await ctx.send(embed=embed)

    @resume.before_invoke
    @play.before_invoke
    async def ensure_voice(self, ctx):
        if ctx.voice_client is None:
            if ctx.author.voice:
                try:

                    await ctx.author.voice.channel.connect()

                except commands.CommandError:
                    embed = discord.Embed(
                        title='Fehler!',
                        colour=discord.Colour.red(),
                        description='Du bist nicht mit einem Sprachkanal verbunden!'
                    )

                    await ctx.send(embed=embed)

        elif ctx.voice_client.is_playing():
            ctx.voice_client.stop()


# COG_SETUP(END)


def setup(client):
    client.add_cog(Music(client))