add basic functionality mirrored from arthurbot

.devcontainer/Dockerfile

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+FROM python:slim
+WORKDIR /
+RUN apt-get -y update; apt-get -y upgrade
+RUN apt-get -y install git binutils xxd
+RUN apt-get -y install python3 python3-dev git python3-pip python-is-python3 libgl1-mesa-dev build-essential ffmpeg
+COPY requirements.txt .
+RUN pip install -r requirements.txt

.devcontainer/requirements.txt

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+discord
+PyNaCl
+pytube
+yt_dlp

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+**/*.json
+
+**/session/*

src/config.py

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+import json
+
+sample_json = """
+{
+	"guild":{
+		"token": "",
+		"prefix": "$",
+		"roleid": 0,
+		"username": "music-bot"
+	},
+}
+"""
+
+def load_config(path, config_vector):
+	try:
+		f = open(path, "r")
+		config_vector.update(json.load(f))
+		f.close()
+		return 0
+	except:
+		f = open(path, "w")
+		f.write(sample_json)
+		f.close()
+		return 1
+
+def save_config(path, config_vector):
+	f = open(path, "w")
+	json.dump(config_vector, f, ensure_ascii=False, indent=4)
+	f.close()
+	return 0
+
+def get_token(config_path):
+	config_vector = {}
+	success = load_config(config_path, config_vector)
+	if success == 0:
+		return config_vector["guild"]["token"]
+	else:
+		return None
+
+def get_prefix(config_path):
+	config_vector = {}
+	success = load_config(config_path, config_vector)
+	if success == 0:
+		return config_vector["guild"]["prefix"]
+	else:
+		return None
+
+def get_roleid(config_path):
+	config_vector = {}
+	success = load_config(config_path, config_vector)
+	if success == 0:
+		return config_vector["guild"]["roleid"]
+	else:
+		return None
+
+def get_username(config_path):
+	config_vector = {}
+	success = load_config(config_path, config_vector)
+	if success == 0:
+		return config_vector["guild"]["username"]
+	else:
+		return None

src/musicbot.py

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+from asyncio import sleep
+import discord
+from discord.ext import commands
+import yt_dlp
+from config import *
+
+config_path = "config.json"
+
+ffmpeg_options = {
+	'options': '-vn'
+}
+
+token = get_token(config_path)
+
+async def determine_prefix(bot, message):
+	return get_prefix(config_path)
+
+intents = discord.Intents.default()
+intents.members = True
+intents.message_content = True
+bot = commands.Bot(command_prefix = determine_prefix, description='very cool', intents = intents)
+
+@bot.event
+async def on_ready():
+	print('Logged in as {0} ({0.id})'.format(bot.user))
+	print('------')
+
+@bot.command()
+async def setprefix(ctx, *arg):
+	if(len(arg) != 1):
+		await ctx.send("usage: setprefix <prefix>")
+
+	else:
+		prefix = arg[0]
+
+		with open("prefix", "w") as f:
+			f.write(prefix)
+			f.close()
+
+		await ctx.send("set prefix to: {0}".format(prefix))
+
+@bot.command()
+async def setrole(ctx, *arg: discord.Role):
+	if(len(arg) != 1):
+		await ctx.send("usage: setrole @<rolename>")
+
+	else:
+		roleid = arg[0].id
+
+		with open("roleid", "w") as f:
+			f.write(str(roleid))
+			f.close()
+
+		await ctx.send("set followable role to {0}".format(arg[0]))
+
+@bot.command()
+async def playmusic(ctx, *arg):
+
+	ydl_opts = {
+		'format': 'mp4',
+		'quiet': True,
+		'paths': {
+			'home': './session/'
+		},
+		'outtmpl': {
+			'default': '%(autonumber)s.%(ext)s',
+		},
+		'postprocessors': [{
+			'key': 'FFmpegExtractAudio',
+		}],
+	}
+
+	try:
+		await ctx.voice_client.disconnect()
+	except:
+		pass
+
+	url = arg[0]
+
+	with yt_dlp.YoutubeDL(ydl_opts) as ydl:
+		info = ydl.extract_info(url, download=False)
+		duration = info.get('duration')
+		name = info.get('title')
+		if duration < 1200:
+			await ctx.send("downloading music requested: {0}".format(name))
+			ydl.download([url])
+			audio = "session/00001.m4a"
+			await ctx.author.voice.channel.connect()
+			ctx.voice_client.play(discord.FFmpegPCMAudio(audio), after=lambda e: print('Player error: %s' % e) if e else None)
+			while ctx.voice_client.is_playing():
+				await sleep(0.01)
+			await ctx.voice_client.disconnect()
+		else:
+			await ctx.send("music requested was too long ({0} > 1200)".format(duration))
+
+bot.run(token)