Add forward seek

src/commands/fseek.ts

@@ -0,0 +1,33 @@
+import {Message, TextChannel} from 'discord.js';
+import {TYPES} from '../types';
+import {inject, injectable} from 'inversify';
+import PlayerManager from '../managers/player';
+import LoadingMessage from '../utils/loading-message';
+import Command from '.';
+
+@injectable()
+export default class implements Command {
+  public name = 'fseek';
+  public description = 'forward seek position in currently playing song';
+  private readonly playerManager: PlayerManager;
+
+  constructor(@inject(TYPES.Managers.Player) playerManager: PlayerManager) {
+    this.playerManager = playerManager;
+  }
+
+  public async execute(msg: Message, args: string []): Promise<void> {
+    const seekTime = parseInt(args[0], 10);
+
+    const loading = new LoadingMessage(msg.channel as TextChannel, 'hold on a sec');
+
+    await loading.start();
+
+    try {
+      await this.playerManager.get(msg.guild!.id).forwardSeek(seekTime);
+
+      await loading.stop('seeked');
+    } catch (_) {
+      await loading.stop('error somewhere');
+    }
+  }
+}