1 files changed, 82 insertions, 0 deletions
diff --git a/backend/AudioControl.js b/backend/AudioControl.js
new file mode 100644
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--- /dev/null
+++ b/backend/AudioControl.js
@@ -0,0 +1,82 @@
+/**************************************************************************
+ *
+ *  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 { readdirSync, readFileSync } from 'node:fs';
+import { shufflePlaylist, orderPlaylist } from './QueueSystem.js';
+import { playAudio, currentTrack, updatePlaylist } from './PlayAudio.js';
+import { player } from './VoiceInitialization.js';
+
+const { shuffle } = JSON.parse(readFileSync('./config.json', 'utf-8'));
+export const files = readdirSync('music');
+export let playerState;
+export let isAudioStatePaused;
+
+let totalTrack = files.length;
+
+export async function nextAudio(bot) {
+  totalTrack--;
+  if (currentTrack >= totalTrack) {
+    console.log('All beats in the playlist has finished, repeating beats...');
+    totalTrack = files.length;
+    return (shuffle === true) ? await shufflePlaylist(bot) : await orderPlaylist(bot);
+  } else {
+    updatePlaylist('next');
+    return await playAudio(bot);
+  }
+}
+
+export async function previousAudio(bot, interaction) {
+  totalTrack++;
+  if (currentTrack <= 0) {
+    return await interaction.reply({ content: 'You are at the beginning of the playlist, cannot go further than this', ephemeral: true });
+  } else {
+    await interaction.reply({ content: 'Playing previous music', ephemeral: true });
+    player.stop();
+    updatePlaylist('back');
+    return await playAudio(bot);
+  }
+}
+
+export function toggleAudioState() {
+  if (isAudioStatePaused === true) {
+    audioState(0);
+  } else {
+    audioState(1);
+  }
+}
+
+export function audioState(state) {
+  switch (state) {
+    case 0:
+      playerState = 'Playing';
+      isAudioStatePaused = false;
+      player.unpause();
+      break;
+    case 1:
+      playerState = 'Paused';
+      isAudioStatePaused = true;
+      player.pause();
+      break;
+    case 2:
+      playerState = 'Stopped';
+      isAudioStatePaused = true;
+      break;
+  }
+}