import asyncio from os import listdir from discord import Intents, User, Member from asyncio import AbstractEventLoop, Semaphore from multiprocessing import Process, Queue from threading import Lock, Thread from typing import Callable, List from discord import Client, Guild, FFmpegPCMAudio, VoiceChannel, TextChannel from Music.Playlist import Playlist from Music.Song import Song from Config.Configs import Configs from discord.ext.commands import Bot from Parallelism.Commands import VCommands, VCommandsType class TimeoutClock: def __init__(self, callback: Callable, loop: asyncio.AbstractEventLoop): self.__callback = callback self.__task = loop.create_task(self.__executor()) async def __executor(self): await asyncio.sleep(Configs().VC_TIMEOUT) await self.__callback() def cancel(self): self.__task.cancel() class PlayerProcess(Process): """Process that will play songs, receive commands from the main process by a Queue""" def __init__(self, name: str, playlist: Playlist, lock: Lock, queue: Queue, guildID: int, textID: int, voiceID: int, authorID: int) -> None: """ Start a new process that will have his own bot instance Due to pickle serialization, no objects are stored, the values initialization are being made in the run method """ Process.__init__(self, name=name, group=None, target=None, args=(), kwargs={}) # Synchronization objects self.__playlist: Playlist = playlist self.__lock: Lock = lock self.__queue: Queue = queue self.__semStopPlaying: Semaphore = None self.__loop: AbstractEventLoop = None # Discord context ID self.__textChannelID = textID self.__guildID = guildID self.__voiceChannelID = voiceID self.__authorID = authorID # All information of discord context will be retrieved directly with discord API self.__guild: Guild = None self.__bot: Client = None self.__voiceChannel: VoiceChannel = None self.__textChannel: TextChannel = None self.__author: User = None self.__botMember: Member = None self.__configs: Configs = None self.__playing = False self.__forceStop = False self.FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 'options': '-vn'} def run(self) -> None: """Method called by process.start(), this will exec the actually _run method in a event loop""" try: print(f'Starting Process {self.name}') self.__loop = asyncio.get_event_loop() self.__configs = Configs() self.__semStopPlaying = Semaphore(0) self.__stopped = asyncio.Event() self.__loop.run_until_complete(self._run()) except Exception as e: print(f'[Error in Process {self.name}] -> {e}') async def _run(self) -> None: # Recreate the bot instance and objects using discord API self.__bot = await self.__createBotInstance() self.__guild = self.__bot.get_guild(self.__guildID) self.__voiceChannel = self.__bot.get_channel(self.__voiceChannelID) self.__textChannel = self.__bot.get_channel(self.__textChannelID) self.__author = self.__bot.get_channel(self.__authorID) self.__botMember = self.__getBotMember() # Connect to voice Channel await self.__connectToVoiceChannel() # Start the timeout function self.__timer = TimeoutClock(self.__timeoutHandler, self.__loop) # Thread that will receive commands to be executed in this Process self.__commandsReceiver = Thread(target=self.__commandsReceiver, daemon=True) self.__commandsReceiver.start() # Start a Task to play songs self.__loop.create_task(self.__playPlaylistSongs()) # Try to acquire a semaphore, it'll be release when timeout function trigger, we use the Semaphore # from the asyncio lib to not block the event loop await self.__semStopPlaying.acquire() # In this point the process should finalize self.__timer.cancel() async def __playPlaylistSongs(self) -> None: if not self.__playing: with self.__lock: song = self.__playlist.next_song() await self.__playSong(song) async def __playSong(self, song: Song) -> None: try: if song is None: return if song.source is None: return self.__playNext(None) self.__playing = True player = FFmpegPCMAudio(song.source, **self.FFMPEG_OPTIONS) voice = self.__guild.voice_client voice.play(player, after=lambda e: self.__playNext(e)) self.__timer.cancel() self.__timer = TimeoutClock(self.__timeoutHandler, self.__loop) # await self.__context.invoke(self.__bot.get_command('np')) except Exception as e: print(f'[ERROR IN PLAY SONG] -> {e}') self.__playNext(None) def __playNext(self, error) -> None: if self.__forceStop: # If it's forced to stop player self.__forceStop = False return None with self.__lock: song = self.__playlist.next_song() if song is not None: coro = self.__playSong(song) self.__bot.loop.create_task(coro) else: self.__playing = False async def __playPrev(self, voiceChannelID: int) -> None: with self.__lock: song = self.__playlist.prev_song() if song is not None: if self.__guild.voice_client is None: # If not connect, connect to the user voice channel self.__voiceChannelID = voiceChannelID self.__voiceChannel = self.__guild.get_channel(self.__voiceChannelID) self.__connectToVoiceChannel() # If already playing, stop the current play if self.__guild.voice_client.is_playing() or self.__guild.voice_client.is_paused(): # Will forbidden next_song to execute after stopping current player self.__forceStop = True self.__guild.voice_client.stop() self.__playing = False await self.__playSong(song) def __commandsReceiver(self) -> None: while True: command: VCommands = self.__queue.get() type = command.getType() args = command.getArgs() print(f'Process {self.name} receive Command: {type} with Args: {args}') if type == VCommandsType.PAUSE: self.__pause() elif type == VCommandsType.PLAY: self.__loop.create_task(self.__playPlaylistSongs()) elif type == VCommandsType.PREV: self.__loop.create_task(self.__playPrev(args)) elif type == VCommandsType.RESUME: self.__resume() elif type == VCommandsType.SKIP: self.__skip() elif type == VCommandsType.RESET: self.__loop.create_task(self.__reset()) elif type == VCommandsType.STOP: self.__loop.create_task(self.__stop()) else: print(f'[ERROR] -> Unknown Command Received: {command}') def __pause(self) -> None: if self.__guild.voice_client is not None: if self.__guild.voice_client.is_playing(): self.__guild.voice_client.pause() async def __reset(self) -> None: if self.__guild.voice_client is None: return # Reset the bot self.__guild.voice_client.stop() await self.__guild.voice_client.disconnect() self.__playlist.clear() self.__playlist.loop_off() await self.__botMember.move_to(None) # Release semaphore to finish the current player process self.__semStopPlaying.release() async def __stop(self) -> None: if self.__guild.voice_client is not None: if self.__guild.voice_client.is_connected(): with self.__lock: self.__playlist.clear() self.__playlist.loop_off() self.__guild.voice_client.stop() await self.__guild.voice_client.disconnect() def __resume(self) -> None: if self.__guild.voice_client is not None: if self.__guild.voice_client.is_paused(): self.__guild.voice_client.resume() def __skip(self) -> None: if self.__guild.voice_client is not None: self.__guild.voice_client.stop() async def __forceStop(self) -> None: try: if self.__guild.voice_client is None: return self.__guild.voice_client.stop() await self.__guild.voice_client.disconnect() with self.__lock: self.__playlist.clear() self.__playlist.loop_off() except Exception as e: print(f'DEVELOPER NOTE -> Force Stop Error: {e}') async def __createBotInstance(self) -> Client: """Load a new bot instance that should not be directly called. Get the guild, voice and text Channel in discord API using IDs passed in constructor """ intents = Intents.default() intents.members = True bot = Bot(command_prefix='Rafael', pm_help=True, case_insensitive=True, intents=intents) bot.remove_command('help') # Add the Cogs for this bot too for filename in listdir(f'./{self.__configs.COMMANDS_PATH}'): if filename.endswith('.py'): bot.load_extension(f'{self.__configs.COMMANDS_PATH}.{filename[:-3]}') # Login and connect the bot instance to discord API task = self.__loop.create_task(bot.login(token=self.__configs.BOT_TOKEN, bot=True)) await task self.__loop.create_task(bot.connect(reconnect=True)) # Sleep to wait connection to be established await self.__ensureDiscordConnection(bot) return bot async def __timeoutHandler(self) -> None: try: print('TimeoutHandler') if self.__guild.voice_client is None: return if self.__guild.voice_client.is_playing() or self.__guild.voice_client.is_paused(): self.__timer = TimeoutClock(self.__timeoutHandler, self.__loop) elif self.__guild.voice_client.is_connected(): with self.__lock: self.__playlist.clear() self.__playlist.loop_off() self.__playing = False await self.__guild.voice_client.disconnect() # Release semaphore to finish process self.__semStopPlaying.release() except Exception as e: print(f'[Error in Timeout] -> {e}') def __is_connected(self) -> bool: try: if not self.__voiceChannel.is_connected(): return False else: return True except: return False async def __ensureDiscordConnection(self, bot: Client) -> None: """Await in this point until connection to discord is established""" guild = None while guild is None: guild = bot.get_guild(self.__guildID) await asyncio.sleep(0.2) async def __connectToVoiceChannel(self) -> bool: try: await self.__voiceChannel.connect(reconnect=True, timeout=None) return True except Exception as e: print(f'[ERROR CONNECTING TO VC] -> {e}') return False def __getBotMember(self) -> Member: guild_members: List[Member] = self.__guild.members for member in guild_members: if member.id == self.__bot.user.id: return member