feat(ping): add slash command for ping

src/commands/utils/ping.ts

@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+/*
+    Animal Rights Advocates Discord Bot
+    Copyright (C) 2022  Anthony Berg
+
+    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 { isMessageInstance } from '@sapphire/discord.js-utilities';
+import { Command } from '@sapphire/framework';
+
+export class PingCommand extends Command {
+  public constructor(context: Command.Context, options: Command.Options) {
+    super(context, {
+      ...options,
+      name: 'ping',
+      description: 'ping pong',
+    });
+  }
+
+  // Registers the slash command
+  public override registerApplicationCommands(registry: Command.Registry) {
+    registry.registerChatInputCommand((builder) => builder
+      .setName(this.name)
+      .setDescription(this.description));
+  }
+
+  // Command run
+  public async chatInputRun(interaction: Command.ChatInputInteraction) {
+    const msg = await interaction.reply({ content: 'Ping?', ephemeral: true, fetchReply: true });
+
+    if (isMessageInstance(msg)) {
+      const diff = msg.createdTimestamp - interaction.createdTimestamp;
+      const ping = Math.round(this.container.client.ws.ping);
+      return interaction.editReply(`Pong 🏓! (Round trip took: ${diff}ms. Heartbeat: ${ping}ms.)`);
+    }
+
+    return interaction.editReply('Failed to retrieve ping :(');
+  }
+}