Add stop command (#540)

Co-authored-by: Max Isom <hi@maxisom.me>

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- `/stop` command to disconnect and clear the queue
 
 ## [1.1.2] - 2022-02-21
 ### Changed

src/commands/stop.ts

@@ -0,0 +1,37 @@
+import {CommandInteraction} from 'discord.js';
+import {SlashCommandBuilder} from '@discordjs/builders';
+import {TYPES} from '../types.js';
+import {inject, injectable} from 'inversify';
+import PlayerManager from '../managers/player.js';
+import {STATUS} from '../services/player.js';
+import Command from '.';
+
+@injectable()
+export default class implements Command {
+  public readonly slashCommand = new SlashCommandBuilder()
+    .setName('stop')
+    .setDescription('stop playback, disconnect, and clear all songs in the queue');
+
+  public requiresVC = true;
+
+  private readonly playerManager: PlayerManager;
+
+  constructor(@inject(TYPES.Managers.Player) playerManager: PlayerManager) {
+    this.playerManager = playerManager;
+  }
+
+  public async execute(interaction: CommandInteraction) {
+    const player = this.playerManager.get(interaction.guild!.id);
+
+    if (!player.voiceConnection) {
+      throw new Error('not connected');
+    }
+
+    if (player.status !== STATUS.PLAYING) {
+      throw new Error('not currently playing');
+    }
+
+    player.stop();
+    await interaction.reply('u betcha');
+  }
+}

src/inversify.config.ts

@@ -26,6 +26,7 @@ import Remove from './commands/remove.js';
 import Seek from './commands/seek.js';
 import Shuffle from './commands/shuffle.js';
 import Skip from './commands/skip.js';
+import Stop from './commands/stop.js';
 import Unskip from './commands/unskip.js';
 import ThirdParty from './services/third-party.js';
 import FileCacheProvider from './services/file-cache.js';
@@ -66,6 +67,7 @@ container.bind<AddQueryToQueue>(TYPES.Services.AddQueryToQueue).to(AddQueryToQue
   Seek,
   Shuffle,
   Skip,
+  Stop,
   Unskip,
 ].forEach(command => {
   container.bind<Command>(TYPES.Command).to(command).inSingletonScope();

src/services/player.ts

@@ -342,6 +342,12 @@ export default class {
     return this.queueSize() === 0;
   }
 
+  stop(): void {
+    this.disconnect();
+    this.queuePosition = 0;
+    this.queue = [];
+  }
+
   private getHashForCache(url: string): string {
     return hasha(url);
   }