Add queue clear command

src/commands/clear.ts

@@ -0,0 +1,22 @@
+import {Message} from 'discord.js';
+import {TYPES} from '../types';
+import {inject, injectable} from 'inversify';
+import Queue from '../services/queue';
+import Command from '.';
+
+@injectable()
+export default class implements Command {
+  public name = 'clear';
+  public description = 'clears all songs in queue (except currently playing)';
+  private readonly queue: Queue;
+
+  constructor(@inject(TYPES.Services.Queue) queue: Queue) {
+    this.queue = queue;
+  }
+
+  public async execute(msg: Message, _: string []): Promise<void> {
+    this.queue.clear(msg.guild!.id);
+
+    await msg.channel.send('cleared');
+  }
+}

src/inversify.config.ts

@@ -21,6 +21,7 @@ import Player from './services/player';
 
 // Comands
 import Command from './commands';
+import Clear from './commands/clear';
 import Config from './commands/config';
 import Play from './commands/play';
 import QueueCommad from './commands/queue';
@@ -38,6 +39,7 @@ container.bind<Player>(TYPES.Services.Player).to(Player).inSingletonScope();
 container.bind<Queue>(TYPES.Services.Queue).to(Queue).inSingletonScope();
 
 // Commands
+container.bind<Command>(TYPES.Command).to(Clear).inSingletonScope();
 container.bind<Command>(TYPES.Command).to(Config).inSingletonScope();
 container.bind<Command>(TYPES.Command).to(Play).inSingletonScope();
 container.bind<Command>(TYPES.Command).to(QueueCommad).inSingletonScope();

src/services/queue.ts

@@ -56,10 +56,7 @@ export default class {
   }
 
   add(guildId: string, song: QueuedSong): void {
-    if (!this.guildQueues.get(guildId)) {
-      this.guildQueues.set(guildId, []);
-      this.queuePositions.set(guildId, 0);
-    }
+    this.initQueue(guildId);
 
     if (song.playlist) {
       // Add to end of queue
@@ -95,7 +92,27 @@ export default class {
     this.guildQueues.set(guildId, [queue[0], ...shuffle(queue.slice(1))]);
   }
 
+  clear(guildId: string): void {
+    this.initQueue(guildId);
+    const queue = this.guildQueues.get(guildId);
+
+    const newQueue = [];
+
+    if (queue!.length > 0) {
+      newQueue.push(queue![0]);
+    }
+
+    this.guildQueues.set(guildId, newQueue);
+  }
+
   size(guildId: string): number {
     return this.get(guildId).length;
   }
+
+  private initQueue(guildId: string): void {
+    if (!this.guildQueues.get(guildId)) {
+      this.guildQueues.set(guildId, []);
+      this.queuePositions.set(guildId, 0);
+    }
+  }
 }