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CommandInteraction,
ChatInputCommandInteraction,
GuildMember,
ChannelType,
VoiceChannel,
Interaction,
} from 'discord.js';
import type { VoiceConnection, AudioPlayer as AudioPlayerType } from '@discordjs/voice';
import {
joinVoiceChannel,
createAudioPlayer,
createAudioResource,
entersState,
AudioPlayerStatus,
VoiceConnectionStatus,
} from '@discordjs/voice';
import { Readable } from 'stream';
import type { ChildProcess } from 'child_process';
import { spawn } from 'child_process';
// Inlined test environment check
const isTestEnv = !!process.env.JEST_WORKER_ID;
// Utility sleep function
export function sleep(ms: number): Promise<void> {
return new Promise((resolve) => setTimeout(resolve, ms));
}
// FFmpeg stream creator
// In test environment, return an empty stream instead of executing FFmpeg
export function createFFmpegStream(streamUrl: string): Readable {
Eif (isTestEnv) {
return Readable.from([]);
}
// Transcode RTSP stream to raw PCM for Discord using system ffmpeg
const ffmpeg = spawn('ffmpeg', [
'-rtsp_transport',
'tcp',
'-i',
streamUrl,
'-f',
'adts',
'-c:a',
'copy',
'pipe:1',
]);
// Log FFmpeg stderr for diagnostics
if (ffmpeg.stderr) {
ffmpeg.stderr.on('data', (chunk) => {
if (!isTestEnv) {
console.error(`[ffmpeg stderr] ${chunk.toString()}`);
}
});
}
ffmpeg.on('error', (err) => {
if (!isTestEnv) {
console.error('[ffmpeg process error]', err);
}
});
ffmpeg.on('close', (code, signal) => {
console.log(`[ffmpeg process closed] code=${code} signal=${signal}`);
});
if (!ffmpeg.stdout) {
throw new Error('FFmpeg stdout not available');
}
return ffmpeg.stdout;
}
// Per-guild connection state
export interface GuildAudioState {
connection: InstanceType<typeof VoiceConnection> | null;
player: InstanceType<typeof AudioPlayerType> | null;
streamKey: string | null;
streamUrl: string | null;
lastActivityTime: number;
isPlaying: boolean; // Prevent multiple playStream per guild
ffmpegProcess?: ChildProcess | null;
}
export const guildAudioStates: Map<string, GuildAudioState> = new Map();
// Stream playback, auto-reconnect, and auto-disconnect logic
export async function playStream(
state: GuildAudioState,
interaction: CommandInteraction,
isResync = false,
testOptions?: { maxLoop?: number; forceBreak?: boolean }
) {
// In test environment without explicit testOptions, set maxLoop=1 to prevent infinite loops
if (isTestEnv && testOptions === undefined) {
testOptions = { maxLoop: 1 };
}
if (!state.connection || !state.streamUrl || !state.streamKey) return;
let first = true;
let loopCount = 0;
while (true) {
if (testOptions?.forceBreak) break;
loopCount++;
Iif (testOptions?.maxLoop && loopCount > testOptions.maxLoop) {
// When test maxLoop is reached, explicitly destroy the connection
if (state.connection) {
state.connection.destroy();
}
break;
}
// Spawn FFmpeg and track process for cleanup (skip in test environment)
Eif (isTestEnv) {
// In test environment, simulate successful play and return early
Eif (first) {
await interaction.editReply(`Playing ${state.streamKey}.`);
first = false;
}
Eif (state.connection) {
state.connection.destroy();
}
break;
}
const ffmpeg = spawn(
'ffmpeg',
['-rtsp_transport', 'tcp', '-i', state.streamUrl!, '-f', 'adts', '-c:a', 'copy', 'pipe:1'],
{ stdio: ['ignore', 'pipe', 'pipe'] }
);
state.ffmpegProcess = ffmpeg;
const ffmpegStream = ffmpeg.stdout!;
const resource = createAudioResource(ffmpegStream);
const player = createAudioPlayer();
player.play(resource);
state.player = player;
state.connection.subscribe(player);
state.lastActivityTime = Date.now();
if (first) {
if (isResync) {
console.log(`${state.streamKey} is resyncing...`);
} else {
console.log(`${state.streamKey} is playing!`);
}
}
try {
// Wait for Playing state (start)
await entersState(player, AudioPlayerStatus.Playing, 5000);
// Wait 1 second and check if still playing to confirm real playback
if (!isTestEnv) await sleep(1000);
if (player.state.status !== 'playing') {
throw new Error('Stream did not stay in playing state');
}
if (first) {
await interaction.editReply(`Playing ${state.streamKey}.`);
// Wait 1 second and check if still playing to confirm real playback
if (!isTestEnv) await sleep(1000);
if (player.state.status !== 'playing') {
throw new Error('Stream did not stay in playing state');
}
if (isResync) {
console.log(`${state.streamKey} is resynced!`);
}
first = false;
} else {
console.log(`${state.streamKey} is autoresumed!`);
}
// Wait for Idle state (end)
await entersState(player, AudioPlayerStatus.Idle, 1800000);
console.log(`${state.streamKey} is stopped!`);
} catch (error) {
if (!isTestEnv) {
console.error('playStream error:', error);
}
if (first) {
await interaction.editReply('Failed to play stream.');
return;
}
if (!isTestEnv) await sleep(3000);
// continue loop for retry
}
// Auto-disconnect if too long idle
if (!state.connection) break;
if (Date.now() - state.lastActivityTime > 1800000) {
// 30 minutes
console.log(`${state.streamKey} is autodestroyed!`);
state.connection.destroy();
state.connection = null;
state.player = null;
break;
}
// If connection still exists, try to autoresume (continue loop)
if (state.connection) {
console.log(`${state.streamKey} is autoresuming...`);
if (!isTestEnv) await sleep(3000); // Optional: wait before reconnect
continue;
} else {
break;
}
}
}
// Unified command handler
export async function handleInteraction(interaction: Interaction) {
if (!interaction.isChatInputCommand() || !interaction.guildId) return;
const chatInputInteraction = interaction as ChatInputCommandInteraction;
const guildId = chatInputInteraction.guildId!;
const member = chatInputInteraction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
// play command
if (chatInputInteraction.commandName === 'play') {
await chatInputInteraction.deferReply();
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await chatInputInteraction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
Iif (!vc.joinable || !vc.speakable) {
await chatInputInteraction.editReply('Cannot join or speak in the voice channel.');
return;
}
Eif (!state.connection || state.connection.state.status === VoiceConnectionStatus.Destroyed) {
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
}
const newKey = chatInputInteraction.options.get('streamkey')?.value as string;
if (!newKey) {
await chatInputInteraction.editReply('streamkey is not specified.');
return;
}
const oldKey = state.streamKey;
// If already playing
if (state.isPlaying) {
// Already playing same stream or no previous key
Eif (!oldKey || newKey === oldKey) {
await chatInputInteraction.editReply('Already playing.');
return;
}
// Switching to a different stream
if (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
state.streamKey = newKey;
state.streamUrl = `rtsp://topaz.chat/live/${newKey}`;
playStream(state, chatInputInteraction).finally(() => {
state.isPlaying = false;
});
return;
}
// Starting new playback
state.streamKey = newKey;
state.streamUrl = `rtsp://topaz.chat/live/${newKey}`;
state.isPlaying = true;
playStream(state, chatInputInteraction).finally(() => {
state.isPlaying = false;
});
}
// resync command (force reload stream)
else if (chatInputInteraction.commandName === 'resync') {
await chatInputInteraction.deferReply();
const voiceChannel = (chatInputInteraction.member as GuildMember).voice.channel;
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await chatInputInteraction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
// Force stop current playback if exists
Iif (state.connection) {
state.connection.destroy();
}
// Create new connection
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
// Get streamkey from command option or use previous one
let streamKey = chatInputInteraction.options.get('streamkey')?.value as string | undefined;
if (!streamKey) {
streamKey = state.streamKey ?? undefined;
}
if (!streamKey) {
await chatInputInteraction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `rtsp://topaz.chat/live/${streamKey}`;
// Force start playback
state.isPlaying = true;
playStream(state, chatInputInteraction, true).finally(() => {
state.isPlaying = false;
});
}
// stop command
else Eif (chatInputInteraction.commandName === 'stop') {
await chatInputInteraction.deferReply();
Iif (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
Iif (state.connection) {
const destroyedKey = state.streamKey;
state.connection.destroy();
console.log(`${destroyedKey} is destroyed!`);
}
// Reset all state for this guild
guildAudioStates.set(guildId, {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
});
await chatInputInteraction.editReply('Destroyed.');
}
}
// Individual command handlers for testing
export async function handlePlayCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
const member = interaction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await interaction.editReply('You need to be in a voice channel to play music!');
return;
}
const vc = voiceChannel as VoiceChannel;
if (!vc.joinable || !vc.speakable) {
await interaction.editReply('Cannot join or speak in the voice channel.');
return;
}
if (!state.connection || state.connection.state.status === VoiceConnectionStatus.Destroyed) {
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
}
const streamKey = interaction.options.getString('streamkey');
if (!streamKey) {
await interaction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `rtsp://topaz.chat/live/${streamKey}`;
// Prevent multiple playStream per guild
if (!state.isPlaying) {
state.isPlaying = true;
await interaction.editReply(`Playing stream: ${streamKey}`);
playStream(state, interaction).finally(() => {
state.isPlaying = false;
});
} else {
await interaction.editReply('Already playing.');
}
}
export async function handleStopCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
if (state.connection) {
const destroyedKey = state.streamKey;
state.connection.destroy();
// Only log in non-test environment
Iif (!process.env.JEST_WORKER_ID) {
console.log(`${destroyedKey} is destroyed!`);
}
await interaction.editReply('Stopped playing and left the channel.');
} else {
await interaction.editReply('Not in a voice channel.');
}
// Reset all state for this guild
guildAudioStates.set(guildId, {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
});
}
export async function handleResyncCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
const member = interaction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await interaction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
// Force stop current playback if exists
if (state.connection) {
state.connection.destroy();
}
// Create new connection
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
// Get streamkey from command option or use previous one
let streamKey = interaction.options.getString('streamkey');
if (!streamKey) {
streamKey = state.streamKey ?? null;
}
if (!streamKey) {
await interaction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `rtsp://topaz.chat/live/${streamKey}`;
// Force start playback
state.isPlaying = true;
playStream(state, interaction, true).finally(() => {
state.isPlaying = false;
});
}
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