Modularized audio backend

1 files changed, 128 insertions, 0 deletions

diff --git a/backend/PlayAudio.js b/backend/PlayAudio.js
new file mode 100644
index 0000000..77a33bc
--- /dev/null
+++ b/backend/PlayAudio.js
@@ -0,0 +1,128 @@
+/**************************************************************************
+ *
+ *  DLAP Bot: A Discord bot that plays local audio tracks.
+ *  (C) Copyright 2022
+ *  Programmed by Andrew Lee
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ ***************************************************************************/
+import { createAudioResource } from '@discordjs/voice';
+import { parseFile } from 'music-metadata';
+import { readdirSync, readFileSync, writeFile } from 'node:fs';
+import { EmbedBuilder } from 'discord.js';
+import { player } from './VoiceInitialization.js';
+import { audioState, files } from './AudioControl.js';
+import { integer } from '../commands/play.js';
+const { statusChannel, txtFile } = JSON.parse(readFileSync('./config.json', 'utf-8'));
+
+let fileData;
+export let audio;
+export let duration;
+export let metadataEmpty = false;
+export let audioTitle;
+export let audioArtist;
+export let audioYear;
+export let audioAlbum;
+export let currentTrack;
+
+const inputFiles = readdirSync('music');
+export async function playAudio(bot) {
+  const resource = createAudioResource('music/' + audio);
+  player.play(resource);
+
+  console.log('Now playing: ' + audio);
+
+  audioState(0);
+
+  const audioFile = audio;
+
+  try {
+    const { common, format } = await parseFile('music/' + audio);
+    metadataEmpty = false;
+    if (common.title && common.artist && common.year && common.album) {
+      audioTitle = common.title;
+      audioArtist = common.artist;
+      audioYear = common.year;
+      audioAlbum = common.album;
+    } else {
+      metadataEmpty = true;
+    }
+    const toHHMMSS = (numSecs) => {
+      const secNum = parseInt(numSecs, 10);
+      const hours = Math.floor(secNum / 3600).toString().padStart(2, '0');
+      const minutes = Math.floor((secNum - (hours * 3600)) / 60).toString().padStart(2, '0');
+      const seconds = secNum - (hours * 3600) - (minutes * 60).toString().padStart(2, '0');
+      return `${hours}:${minutes}:${seconds}`;
+    };
+    duration = toHHMMSS(format.duration);
+  } catch (e) {
+    console.error(e);
+  }
+
+  audio = audio.split('.').slice(0, -1).join('.');
+
+  if (txtFile === true) {
+    fileData = 'Now Playing: ' + audio;
+    writeFile('./now-playing.txt', fileData, (err) => {
+      if (err) { console.log(err); }
+    });
+  }
+
+  const statusEmbed = new EmbedBuilder();
+  if (metadataEmpty === true) {
+    statusEmbed.setTitle('Now Playing');
+    statusEmbed.addFields(
+      { name: 'Title', value: audio },
+      { name: 'Duration', value: duration }
+    );
+    statusEmbed.setColor('#0066ff');
+  } else {
+    statusEmbed.setTitle('Now Playing');
+    statusEmbed.addFields(
+      { name: 'Title', value: audioTitle, inline: true },
+      { name: 'Artist', value: audioArtist, inline: true },
+      { name: 'Year', value: `${audioYear}` },
+      { name: 'Duration', value: duration }
+    );
+    statusEmbed.setFooter({ text: `Album: ${audioAlbum}\nFilename: ${audioFile}` });
+    statusEmbed.setColor('#0066ff');
+  }
+  const channel = bot.channels.cache.get(statusChannel);
+  if (!channel) return console.error('The status channel does not exist! Skipping.');
+  return await channel.send({ embeds: [statusEmbed] });
+}
+
+export function updatePlaylist(i) {
+  switch (i) {
+    case 'next':
+      currentTrack++;
+      audio = files[currentTrack];
+      break;
+    case 'back':
+      currentTrack--;
+      audio = files[currentTrack];
+      break;
+    case 'reset':
+      currentTrack = 0;
+      audio = files[currentTrack];
+      break;
+    case 'input':
+      audio = inputFiles[integer];
+      break;
+    case 'stop':
+      audio = 'Not Playing';
+      break;
+  }
+}