start: a crufty yet working beginning
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247
bot.js
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247
bot.js
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/*
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shred.ing-discord - audio streaming c2+util
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Copyright 2025 Corwin Brust <corwin@bru.st>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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Commentary:
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Thanks to numerious kind folks on IRC on SO, as well ihis helpful post
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that turned me onto Eris: https://www.toptal.com/chatbot/how-to-make-a-discord-bot
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*/
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const fs = require('fs');
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//const eris = require('eris');
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const eris = require("@projectdysnomia/dysnomia");
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const configEnvVar = 'SHRED_BOT_CONFIG';
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const configFile = process.env.hasOwnProperty( configEnvVar )
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? process.env[ configEnvVar ]
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: '/opt/shred.ing/discord-channels-simple.json';
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const shredConfig = JSON.parse( fs.readFileSync( configFile ) );
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function writeConfig() { fs.writeFileSync( configFile, JSON.stringify( shredConfig ) ) }
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const token = fs.readFileSync( shredConfig.tokenFile ).toString();
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const uri = shredConfig.uri;
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const bot = new eris.Client( token, {
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seedVoiceConnections: true,
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reconnectDelay: 17000
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});
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const joinAndPlay = function (msg) {
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_internal_join_and_play( msg.member.voiceState.channelID, msg.channel.id);
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};
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let activeChannels = {};
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const _internal_join_and_play = function( joinID, msgID ) {
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bot.joinVoiceChannel(joinID).catch((err) => { // Join the user's voice channel
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if(msgID) {
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bot.createMessage(msgID, "Error joining voice channel: " + err.message); // Notify the user if there is an error
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}
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console.log({'error joining voice channel': err,chan:joinID}); // Log the error
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}).then((connection) => {
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//connection.play( uri, { voiceDataTimeout: -1 } ); // Play the file and notify the user
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const ac = { playing: false, timer: false };
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ac.stop = function() { connection.stopPlaying(); };
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ac.play = function() {
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connection.play( uri, { voiceDataTimeout: -1 });
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ac.playing = true
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};
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ac.before = function() {
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if (connection.playing) { // Stop playing if the connection is playing something
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connection.stopPlaying();
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}
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};
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ac.when = function() {
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if(msgID) {
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bot.createMessage(msgID, `Now playing **${uri}**`);
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}
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},
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ac.after = function() {
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//if(msgID) bot.createMessage(msgID, `Finished **${uri}**`); // Say when the file has finished playing
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ac.playing = false;
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console.log(`Finished in ${ joinID }`);
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},
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ac.cancel = function() {
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if(ac.timer) clearInterval( ac.timer );
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if(ac.playing) ac.stop();
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};
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ac.start = function() {
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ac.before();
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ac.play();
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ac.when();
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connection.once("end", () => { ac.after() });
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};
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ac.maybeStart = function() {
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try {
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if(! ac.playing ) {
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ac.start();
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}
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} catch(err) {
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console.log('ERROR: failed in maybeStart ' + err);
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}
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};
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activeChannels[ joinID ] = ac;
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ac.timer = setInterval( ac.maybeStart, 1000 );
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});
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};
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const doAutoJoin = function () {
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const autoJoin = shredConfig.autoJoin;
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for(var i = 0; i < autoJoin.length; ++i) {
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try {
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//console.debug({autoJoin:autoJoin[i],botGuilds:bot.guilds,chanGet:bot.guilds.get( autoJoin[i].guild )});
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//const vc = bot.guilds.get( autoJoin[i].guild ).channels.get( autoJoin[i].channel );
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//_internal_join_and_play( vc.id );
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_internal_join_and_play( autoJoin[i].channel );
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}
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catch (err) {
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console.log('ERROR: failed to autojoin channel #' + i + ' guild:' + autoJoin[i].guild + ' ID:'+ autoJoin[i].channel + ' -> ' + err);
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}
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}
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};
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let title = null;
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let trackUri = '';
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function formatArtist(artist,album,year) {
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var rv = '';
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if(album) {
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rv = rv ? rv + ' ' + album : album;
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}
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if(year && album != year) {
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rv = rv ? `${rv}, /${year}/` : year
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}
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if(artist) {
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rv = rv ? (rv.includes('(')?`${artist}, ${rv}` : `${artist} (${rv})`) : artist;
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}
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return rv;
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}
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function formatTrackTitle(meta) {
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if(! meta) return '';
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const {title,artist,album,date,year,filename} = meta;
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const who = formatArtist(artist,album,year||date);
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const fileUri
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= 'https://f.shred.ing/'
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+ encodeURI(
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filename.replace('/spokes/gw11/storage/ftp/music/','')
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);
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//console.log({title:title,who:who,fileUri:fileUri,artist:artist,album:album,date:date,year:year,filename:filename});
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const rv
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= //'[🔗]('+ fileUri +') '
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//+ ' ' +
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title
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+ ' '
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+ formatArtist(artist,album,year||date)
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return [rv,fileUri];
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}
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const setStatus = async function() {
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try {
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const response = await fetch( shredConfig.titleUri );
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if(!response.ok) {
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//await msg.channel.createMessage( 'Playing (error retreiving title)' );
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//throw new Error(`Title response status: ${response.status}`);
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console.log(`ERROR: Title status response: ${response.status}`);
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}
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const json = await response.json();
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// if(json && json.title && json.title !== title) {
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// //await msg.channel.createMessage( "Playing: " + json.title );
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// title = json.title;
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// console.log("New track title: " + json.title);
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// bot.editStatus("online", [ { name: title, type: 0, url: "https://shred.ing" }]);
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// }
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//const {t,ar,al,dt,yr,fn} = await response.json();
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if(json) {
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let [newTitle,newLink] = formatTrackTitle(Object.fromEntries( json ));
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if(newTitle && newTitle != title) {
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console.log("New track title: " + newTitle + ' at ' + newLink);
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title = newTitle;
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trackUri = newLink;
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bot.editStatus("online", [ { name: title, type: 0, url: newLink}]);
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}
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}
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} catch (err) {
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console.log('ERROR: fetching title ' + err);
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}
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};
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let timer = setInterval( setStatus, 10000 );
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// Every time a message is sent anywhere the bot is present,
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// this event will fire and we will check if the bot was mentioned.
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// If it was, the bot will attempt to respond with "Present".
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bot.on('messageCreate', async (msg) => {
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const botWasMentioned = msg.mentions.find(
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mentionedUser => mentionedUser.id === bot.user.id,
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);
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if (botWasMentioned) {
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try {
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if( msg.content.indexOf( 'stop' ) != -1) {
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// request to stop
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if(! msg.member.voiceState.channelID ) {
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// user is not in a voice channel
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bot.createMessage(msg.channel.id, "You are not in a voice channel.");
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} else {
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const chan = bot.guilds.get( msg.guildID ).channels.get( msg.member.voiceState.channelID );
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if(chan.id && activeChannels[ chan.id ]) activeChannels[ chan.id ].cancel()
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chan.leave();
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}
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} else if( msg.content.indexOf( 'join' ) != -1) {
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// request to join a channel
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if(! msg.member.voiceState.channelID ) {
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// user is not in a voice channel
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bot.createMessage(msg.channel.id, "You are not in a voice channel.");
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} else {
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joinAndPlay( msg );
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}
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} else {
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// treat everything else a request for current track title
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// const response = await fetch( 'https://shred.ing/json' );
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// if(!response.ok) {
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// await msg.channel.createMessage( 'Playing (error retreiving title)' );
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// throw new Error(`Title response status: ${response.status}`);
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// }
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// const json = await response.json();
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await msg.channel.createMessage( "Playing: " + title + "\n\nDownload: " + trackUri + "\n" );
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//setStatus();
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}
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} catch (err) {
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// There are various reasons why sending a message may fail.
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// The API might time out or choke and return a 5xx status,
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// or the bot may not have permission to send the
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// message (403 status).
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console.warn('Failed to respond to mention.');
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console.warn(err);
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}
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}
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});
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bot.on('error', err => {
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console.warn(err);
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});
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bot.connect();
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const autoJoinTimer = setTimeout( doAutoJoin, 10000 );
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